Twin Peaks Weather
Viewpoint • San Francisco Bay Area
At 922 feet, the two grassy summits of Twin Peaks near San Francisco's geographic center are second in height only to Mount Davidson. San Francisco Recreation and Parks manages the 64-acre park, whose coastal scrub and grassland are habitat for the endangered mission blue butterfly. Twin Peaks Boulevard winds around both summits to the north peak overlook at Christmas Tree Point, with Sutro Tower just beyond. Few spots in the city put you so squarely on the ridge that splits foggy west from sunny east.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Twin Peaks weather today and through the year
It's 51°F at Twin Peaks right now (feels like 48°F), with 5 mph wind and a comfort score of 75. Monday's forecast high at Twin Peaks is 53°F, 10°F below the mid November normal of 63°F. No fog in the forecast for today at Twin Peaks. In November, 14% of morning hours here are foggy on average. The best window today is 10 AM to 1 PM, at about 49°F with a 3 mph wind (comfort 52).
September is the warmest month at Twin Peaks, with an average high of 74°F. January is the coldest, with an average low of 43°F. December is the wettest month (5.2 in.), out of about 24.9 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Twin Peaks are September, October, and August. The best hours are usually noon to 3 PM in September, noon to 3 PM in October, and noon to 3 PM in August.
Twin Peaks is the hinge of San Francisco's summer weather. Recreation and Parks' natural-areas plan calls it a prominent dividing point for the summer coastal fog. The west-facing slopes get substantial fog and strong winds, while the east-facing slopes get more sun and warmth. From the summit you can often look west over a gray Sunset and east over a sunny Mission and downtown at the same moment.
Forecast updated November 15, 2026 at 4:00 AM PST. Climate figures come from NOAA 1991-2020 normals. Hourly patterns come from NOAA's HRRR hourly analysis from September 2014 to April 2026.
What to expect at Twin Peaks in the next few days
Active National Weather Service alerts
- High Surf Advisory until Tue 4:00 AM
- High Surf Warning until Sun 4:00 AM
Fog
No fog in the forecast for today at Twin Peaks. In November, 14% of morning hours here are foggy on average.
Best time to go
The best window today is 10 AM to 1 PM, at about 49°F with a 3 mph wind (comfort 52).
Hiking conditions
Best hiking day this week: Monday, with 9 daylight hours that are dry, 45 to 80°F, and under 18 mph wind. 4 of the next 7 days have at least 4 such hours.
Best day this week
Of the next 7 days, Friday looks best for Twin Peaks, with a 58°F high and midday comfort near 77. Today looks weakest (38).
Rain
Next good chance of rain: today (75%, about 0.72 in.).
Live weather map
Weather around Twin Peaks right now
Overcast and 51° at Twin Peaks right now.
About the live weather map for Twin Peaks
The map centers on Twin Peaks and stacks fog, satellite clouds, and precipitation radar on one view. Clouds come from the GOES-West satellite and rain from NOAA radar, and both show current conditions. Fog comes from our HRRR-based fog model, and the slider steps through its forecast for the next 12 hours.
Dots mark nearby places with their current temperature, colored by comfort score. Use the layer buttons to turn any layer off, or open the full map for every destination in the region.
Nearby Temperature Comparison
Conditions at nearby San Francisco Bay Area destinations
Tip: Bay Area temperatures can change by 20 to 30°F over a short distance because of microclimates.
Twin Peaks vs nearby places
Typical summer conditions compared with Twin Peaks, from the same NOAA HRRR hourly record. The list shows the closest places, then nearby places whose climate differs the most.
| Place | Distance | Summer afternoons | Morning fog | Afternoon wind | Compared with Twin Peaks |
|---|---|---|---|---|---|
| Forest Hill | 0.7 mi | same | 48% | 13 mph | same 3 km weather-model cell, so our hourly data cannot tell them apart |
| Noe Valley | 0.9 mi | same | 48% | 13 mph | same 3 km weather-model cell, so our hourly data cannot tell them apart |
| Castro District | 0.9 mi | same | 48% | 13 mph | same 3 km weather-model cell, so our hourly data cannot tell them apart |
| Lafayette | 20.2 mi | +17°F | 13% | 9 mph | about 17°F warmer on summer afternoons and less summer morning fog (13% vs 48% of morning hours) |
| Walnut Creek | 23.6 mi | +20°F | 11% | 8 mph | about 20°F warmer on summer afternoons and less summer morning fog (11% vs 48% of morning hours) |
| Danville | 24.9 mi | +19°F | 3% | 8 mph | about 19°F warmer on summer afternoons and less summer morning fog (3% vs 48% of morning hours) |
Places with a climate like Twin Peaks'
- Davenport (53 mi away): similar temperatures through the year
- Año Nuevo Point (45 mi away): similar temperatures through the year
- Año Nuevo State Park (44 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Twin Peaks climate comparisons mean
These cards compare recent conditions at Twin Peaks with the available local baseline. Temperature and year-to-date rainfall use long-term normals when available. Fog, sunshine, wind, and comfort use the matching recent or modeled baseline identified on each card.
Positive and negative differences describe how Twin Peaks departs from its own usual pattern. They should not be read as a direct comparison with another city or as a forecast beyond the period shown.
Twin Peaks weather by month
September is the warmest month at Twin Peaks, with an average high of 74°F. January is the coldest, with an average low of 43°F. December is the wettest month (5.2 in.), out of about 24.9 in. a year. Morning fog peaks in July, when fog or low cloud covers 55% of the hours from 6 to 10 AM. October has the clearest middays, with clouds covering about 24% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Twin Peaks are September, October, and August. The best hours are usually noon to 3 PM in September, noon to 3 PM in October, and noon to 3 PM in August.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 57°F | 43°F | 4.7 in | 9 | 19% | 36% | 6 mph | 9.8 h | 55 |
| Feb | 60°F | 45°F | 4.8 in | 9 | 17% | 29% | 8 mph | 10.7 h | 57 |
| Mar | 62°F | 46°F | 3.5 in | 8 | 17% | 32% | 9 mph | 11.9 h | 60 |
| Apr | 64°F | 47°F | 1.7 in | 5 | 20% | 29% | 11 mph | 13.2 h | 66 |
| May | 67°F | 50°F | 0.8 in | 4 | 30% | 35% | 13 mph | 14.2 h | 63 |
| Jun | 70°F | 52°F | 0.2 in | 2 | 40% | 30% | 13 mph | 14.8 h | 71 |
| Jul | 71°F | 54°F | 0.0 in | 1 | 55% | 38% | 13 mph | 14.5 h | 71 |
| Aug | 73°F | 54°F | 0.1 in | 1 | 48% | 36% | 12 mph | 13.6 h | 79 |
| Sep | 74°F | 54°F | 0.1 in | 2 | 33% | 31% | 11 mph | 12.3 h | 86 |
| Oct | 71°F | 52°F | 1.1 in | 4 | 17% | 24% | 8 mph | 11.1 h | 81 |
| Nov | 63°F | 47°F | 2.8 in | 7 | 14% | 25% | 6 mph | 10.0 h | 66 |
| Dec | 57°F | 43°F | 5.2 in | 10 | 24% | 37% | 6 mph | 9.6 h | 34 |
Morning fog is the share of hours from 6 to 10 AM with fog or low cloud. Midday cloud is the average from 11 AM to 3 PM, and afternoon wind is the average from 1 to 5 PM. The highlighted rows are the most comfortable months.
In summer, recent daily NOAA readings at Twin Peaks average about 7°F cooler than the 1991-2020 normals. The normals average over a wider area that also covers nearby terrain. Read the monthly highs as a rough range, and use the recent months below for what Twin Peaks has actually seen.
What makes Twin Peaks' weather different
Among the 10 San Francisco Bay Area viewpoints we track, Twin Peaks has the 2nd-foggiest summer mornings and the 3rd-cloudiest summer middays.
- #2of 10
foggiest summer morningsamong San Francisco Bay Area viewpoints
- #3of 10
cloudiest summer middaysamong San Francisco Bay Area viewpoints
When the fog burns off
61%of 9 AM hours foggy in July
Fog or low cloud covers Twin Peaks in 61% of 9 AM hours in July, the foggiest month. It often lingers, and 31% of mid-afternoon hours are still foggy. November mornings are the least foggy (14%).
When the wind picks up
2 PMwhen afternoon wind builds, February–October
From February through October, wind at Twin Peaks typically builds after 2 PM. In July it peaks around 6 PM, averaging 15 mph with 47% of those hours windy, while mornings average 8 mph.
Model resolution
6 placesshare one 3 km NOAA HRRR grid cell
Twin Peaks shares one 3 km grid cell in NOAA's HRRR model with Noe Valley, Haight-Ashbury, Castro District, Corona Heights Park and Forest Hill. The places in that cell range from 121 to 916 ft. The hourly fog, wind, cloud, and temperature patterns on this site are the same for all of them. Real differences between them come from hills, elevation, and wind exposure that the model cannot resolve.
Daylight
9.6–14.8 hof daylight, Dec to Jun
Days at Twin Peaks range from about 9.6 hours in December to 14.8 hours in June. In mid-June the sun sets around 8:34 PM, and in mid-December around 4:58 PM.
Seasons at Twin Peaks
- Warm seasonJul 3 – Oct 6 · highs 71°F+
The warm season lasts about 3.2 months, from Jul 3 to Oct 6, when the average high is 71°F or warmer. Highs peak around Sep 8 at about 74°F.
- Cool seasonNov 29 – Feb 28 · highs 61°F or lower
The cool season runs from Nov 29 to Feb 28, when the average high is 61°F or lower. The coldest nights come around Jan 8, with an average low near 43°F.
- Rainy seasonNov 6 – Apr 7 · 84% of the year's rain
The rainy season runs from Nov 6 to Apr 7, when a day has at least a 20% chance of measurable rain. That stretch brings 84% of the year's rain.
The dark line marks today. Season dates come from the smoothed daily NOAA 1991-2020 normals. Counting from Oct. 1, a typical year has its first inch of rain by Oct 28 and half of its annual total by Jan 23.
Days per year and extremes (Nov 1, 2024 to Oct 31, 2026)
This record runs from Nov 1, 2024 to Oct 31, 2026. Over this record, Twin Peaks averaged 1 day a year at 90°F or hotter and no freezing nights. It averaged 17 days a year with at least half an inch of rain and 2 afternoons with wind of 20 mph or more at 2 PM. About 148 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Sep 9, 2026 (93°F) and the coldest night was Feb 20, 2026 (39°F). The wettest day was Nov 23, 2024 (3.36 in.), and the strongest 2 PM gust was 44 mph on Mar 12, 2025.
- 1day at 90°F or hotter
- 0nights at or below freezing
- 17days with ½ in. of rain or more
- 2afternoons with 20+ mph wind
- 148mornings with 3+ hours of fog or low cloud
- Hottest day93°FSep 9, 2026
- Coldest night39°FFeb 20, 2026
- Wettest day3.36 inNov 23, 2024
- Strongest 2 PM gust44 mphMar 12, 2025
What shapes Twin Peaks' weather
Twin Peaks' 922-foot summit is not high enough to reliably clear the summer marine layer, the deck of cool, foggy ocean air. When the layer is deep, the peaks sit inside the cloud, with blowing mist and little view. When it is shallow, you can stand above a sea of fog covering the west side, which is the scene most photographers come for.
Wind is the constant on Twin Peaks. The sea breeze pushes up the west slopes and speeds up over the top, and the mission blue butterflies here have adapted by flying low between lupine plants. In winter, these hills wring extra rain from Pacific storms. The Weather Service's rainfall analysis puts the city's wettest ground in the high south-central hills.
Tips for visiting Twin Peaks
Dress for real wind
On a survey day the park's plan calls typical, the wind blew steadily around 25 mph, with gusts over 35 mph. Bring a windproof layer even on a sunny day.
Drive in from Portola Drive
The gate off Burnett Avenue is closed to vehicles, so use the gate off Portola Drive.
Hike the summit trail for the full view
A 0.7-mile trail network climbs both peaks and gives 360-degree views that beat the 180-degree view from the north peak parking lot.
Take Muni and leave nothing in the car
Muni buses stop along Crestline Drive and Portola Drive. If you drive, don't leave valuables in parked cars.
Twin Peaks through the seasons
- Spring (March–May)
- Wildflowers and lupine bloom in the grassland in spring, and clear days are common before the summer fog sets in. Look for the light blue mission blue butterfly in the rocky grassland.
- Summer (June–August)
- Summer is windy, with substantial fog on the west-facing slopes and the summit often in the cloud. Views above the fog come when the marine layer is shallow.
- Fall (September–October)
- The fog season fades, the wind eases, and the long views to the bay and East Bay hills open up.
- Winter (November–February)
- Winter is the rainy season, and the summit gets some of the city's heaviest rain. Clear days between storms give the sharpest views.
Activities and the weather that matters
- City views and photography: Photos need a clear day or a low, shallow fog layer. Fall mornings and post-storm winter days give the longest views.
- Hiking the peaks: The trails are short but exposed, with strong winds most afternoons. Stay on established trails to avoid poison oak and erosion.
- Creek to Peaks hike from Glen Canyon: A 1.2-mile route links Glen Canyon to Twin Peaks. Start in the sheltered canyon and expect wind once you top out.
Official sources and current conditions
Numbers on this page come from NOAA data. The text draws on the official sources linked above.
Historical Climate Data
Long-term weather patterns and climate data
Data sources: Recent temperatures come from NOAA URMA and recent precipitation from NOAA Stage IV. Fog, cloud, wind, humidity, and sunshine come from NOAA HRRR, and long-term baselines from NOAA 1991-2020 climate normals.
Climate Overview
Based on NOAA 30-year temperature/rain normals (1991-2020) with recent fog/sun baseline
🌟 Best Months to Visit
⚠️ Challenging Months
Monthly Breakdown
| Month | Comfort | High/Low | ☀️ Sun | 🌫️ Fog | 💧 Rain | Perfect |
|---|---|---|---|---|---|---|
| November 2024 | 78 | 60.7° / 48.9° | 6.7h | 6d | 5.43" | 18 |
| December 2024 | 69 | 58.8° / 48.2° | 5.1h | 10d | 6.84" | 12 |
| January 2025 | 82 | 58.6° / 45.4° | 7h | 6d | 0.22" | 20 |
| February 2025 | 73 | 58.9° / 46.1° | 6.4h | 6d | 8.37" | 11 |
| March 2025 | 77 | 58.9° / 46.6° | 8h | 3d | 2.07" | 14 |
| April 2025 | 81 | 59.3° / 48.4° | 9.3h | 10d | 0.45" | 18 |
| May 2025 | 86 | 63° / 50.3° | 11.8h | 6d | 0.18" | 23 |
| June 2025 | 79 | 61.3° / 51.6° | 11.3h | 19d | 0" | 13 |
| July 2025 | 78 | 61.9° / 54.1° | 9.9h | 22d | 0" | 10 |
| August 2025 | 84 | 66.7° / 56.2° | 10.1h | 15d | 0" | 17 |
| September 2025 | 85 | 69.1° / 58.6° | 9h | 9d | 0.1" | 23 |
| October 2025 | 86 | 67° / 54.8° | 8h | 7d | 1.03" | 24 |
| November 2025 | 77 | 61.9° / 51.8° | 6.5h | 13d | 3.37" | 10 |
| December 2025 | 66 | 55.8° / 46.7° | 4.9h | 13d | 5.7" | 3 |
| January 2026 | 79 | 60.5° / 48° | 6.7h | 3d | 4.48" | 21 |
| February 2026 | 75 | 61.9° / 49.2° | 6.5h | 4d | 5.53" | 15 |
| March 2026 | 92 | 69.9° / 52.5° | 9.6h | 3d | 0.06" | 26 |
| April 2026 | 81 | 62.6° / 50.8° | 9.2h | 7d | 4.45" | 17 |
| May 2026 | 84 | 62.8° / 51.4° | 11h | 11d | 0.74" | 22 |
| June 2026 | 83 | 64.4° / 53.6° | 11.2h | 15d | 0.02" | 18 |
| July 2026 | 84 | 65.2° / 55.1° | 10.9h | 14d | 0" | 20 |
| August 2026 | 81 | 65.1° / 56° | 9.9h | 23d | 0" | 14 |
| September 2026 | 87 | 67.6° / 56.6° | 9.3h | 7d | 0.09" | 23 |
| October 2026 | 89 | 68.9° / 54.3° | 8.4h | 3d | 0.2" | 28 |
Climate Trends
Average Temperature by Month
About the Twin Peaks climate charts
The temperature chart compares average monthly highs and lows at Twin Peaks, showing both the seasonal cycle and the typical day-to-night range. The comfort chart summarizes how often the combined weather pattern is favorable rather than judging temperature alone.
Precipitation shows the total recorded or modeled rainfall for each month at Twin Peaks. Sunshine compares average bright-sky hours with the daylight available, while fog shows the average number of morning fog or low-cloud hours per day. Switch between the chart tabs to compare the same months across each measure.
Hourly Temperature, Fog, Wind, Cloud Cover, and Solar Radiation Patterns
Average local hour by month from 2014-09-30 to 2026-04-30
- Temperature: At Twin Peaks, the warmest typical hour is 2 PM in September (69°F). The coldest is 7 AM in January (46°F).
- Fog: Fog or low cloud covers Twin Peaks in 61% of 9 AM hours in July, the foggiest month. It often lingers, and 31% of mid-afternoon hours are still foggy. November mornings are the least foggy (14%).
- Wind: From February through October, wind at Twin Peaks typically builds after 2 PM. In July it peaks around 6 PM, averaging 15 mph with 47% of those hours windy, while mornings average 8 mph.
- Cloud Cover: October middays are the clearest at Twin Peaks (24% average cloud cover), and July middays are the cloudiest (38%).
- Solar Radiation: The strongest typical sun at Twin Peaks comes at 1 PM in June, averaging 871 W/m².
How to read the hourly heatmaps for Twin Peaks
This heatmap shows how average temperature at Twin Peaks changes by hour and month. Read left to right for the seasons and top to bottom for the time of day. Warmer colors mark the usual afternoon peaks, and cooler colors show overnight and winter lows.
This heatmap shows when fog or low cloud is most likely at Twin Peaks. Darker cells mark the months and hours when fog has been most common. They help separate overnight or morning fog from cloud that tends to linger into the afternoon.
This heatmap shows the typical hourly wind pattern at Twin Peaks through the year. It makes recurring afternoon wind, calmer overnight periods, and seasonal changes easier to compare than a single daily wind value.
This heatmap shows average cloud cover at Twin Peaks for every month and hour. Use it to see whether cloudiness is mainly an overnight and morning pattern or commonly persists during the part of the day you plan to visit.
This heatmap shows the average solar radiation reaching Twin Peaks by month and hour. Brighter cells indicate the strongest typical sun, while muted cells can reflect nighttime, shorter winter days, cloud cover, smoke, or terrain shading.
Each cell combines one month with one local hour. Hover over or focus on a cell for its value and sample coverage. The red marker shows the current month and hour.
How recent months compared at Twin Peaks
- October 2026 recap: October 2026 at Twin Peaks averaged a high of 69°F, 2°F warmer than October 2025 (67°F).
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 25.5 in. of rain to Twin Peaks, 102% of the 24.9 in. normal.
Location Details
Twin Peaks weather questions
Everything you need to know about weather and visiting Twin Peaks
What is the weather like at Twin Peaks today?
It's 51°F at Twin Peaks right now, with a comfort score of 75 (great). Monday's forecast high at Twin Peaks is 53°F, 10°F below the mid November normal of 63°F. The best window today is 10 AM to 1 PM, at about 49°F with a 3 mph wind (comfort 52).
What is the best month to visit Twin Peaks?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Twin Peaks are September, October, and August. The best hours are usually noon to 3 PM in September, noon to 3 PM in October, and noon to 3 PM in August. The warm season lasts about 3.2 months, from Jul 3 to Oct 6, when the average high is 71°F or warmer. Highs peak around Sep 8 at about 74°F.
What are the warmest and coldest months at Twin Peaks?
September is the warmest month at Twin Peaks, with an average high of 74°F. January is the coldest, with an average low of 43°F.
When does the fog burn off at Twin Peaks?
Fog or low cloud covers Twin Peaks in 61% of 9 AM hours in July, the foggiest month. It often lingers, and 31% of mid-afternoon hours are still foggy. November mornings are the least foggy (14%).
When is it windiest at Twin Peaks?
From February through October, wind at Twin Peaks typically builds after 2 PM. In July it peaks around 6 PM, averaging 15 mph with 47% of those hours windy, while mornings average 8 mph.
How much rain does Twin Peaks get?
December is the wettest month (5.2 in.), out of about 24.9 in. a year. The rainy season runs from Nov 6 to Apr 7, when a day has at least a 20% chance of measurable rain. That stretch brings 84% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 25.5 in. of rain to Twin Peaks, 102% of the 24.9 in. normal.
Does it ever snow on Twin Peaks?
Rarely. The National Weather Service's climate history of San Francisco notes up to 7 inches on Twin Peaks in February 1887. It also records up to 5 inches at the top in February 1976. Measurable snow anywhere in the city is extremely rare.
What kind of place is Twin Peaks?
At 922 feet, the two grassy summits of Twin Peaks near San Francisco's geographic center are second in height only to Mount Davidson. San Francisco Recreation and Parks manages the 64-acre park, whose coastal scrub and grassland are habitat for the endangered mission blue butterfly. Twin Peaks Boulevard winds around both summits to the north peak overlook at Christmas Tree Point, with Sutro Tower just beyond. Few spots in the city put you so squarely on the ridge that splits foggy west from sunny east.
What is Twin Peaks weather like in November?
November at Twin Peaks averages a high of 63°F and a low of 47°F, with 2.8 in. of rain over about 7 rainy days. About 14% of morning hours are foggy. Afternoon wind averages 6 mph.
More about Twin Peaks weather
Guides that explain the weather here and nearby
- Fata Morgana: Why the Farallon Islands Seem to Float
- San Francisco Weather in February: Rain and Early Spring
- Upslope Fog: Why Bay Area Hills Are Foggier Than the Flats
- San Francisco Weather in January: Cold, Wet, Unpredictable
- Does It Snow in San Francisco? What Actually Happens in Winter
- San Francisco Weather in June: Fog Season Sets In, Here's What to Know
Data sources and methods
- Monthly temperatures and precipitation: NOAA 1991-2020 normals.
- Fog, cloud, wind, sun, and comfort by hour and month: NOAA's HRRR hourly analysis from September 2014 to April 2026.
- Daily records and recent months: NOAA URMA and HRRR analyses, plus NOAA Stage IV precipitation.
- Nearby comparisons and regional rankings use the same hourly HRRR summaries for every destination in the region.
- Alerts: National Weather Service. Tides and ocean temperature: NOAA CO-OPS, where shown.
- All statements on this page are computed from these datasets, apart from the “What shapes the weather” guide, which cites its sources inline.
- San Francisco Recreation and Parks, Twin Peaks (accessed 2026-10-27)
- San Francisco Recreation and Parks, Twin Peaks Trail (accessed 2026-10-27)
- SF Recreation and Parks, Significant Natural Resource Areas Management Plan, section 6.8 Twin Peaks (final draft, February 2006) (accessed 2026-10-27)
- National Weather Service, Climate of San Francisco (NOAA Technical Memorandum NWS WR-126, Jan Null, 1995) (accessed 2026-10-27)
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