Calistoga Weather
Town • San Francisco Bay Area
Calistoga sits at the narrow northern head of the Napa Valley. Here the valley floor runs out against Mount St. Helena, and Highway 29 starts its climb toward Lake County. Hot mineral water rises beneath Calistoga and feeds its spas, mud baths and naturally heated pools. The Old Faithful Geyser of California erupts just north of downtown on Tubbs Lane. It is the last town before the road reaches Robert Louis Stevenson State Park.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Calistoga weather today and through the year
It's 54°F at Calistoga right now (feels like 51°F), with 7 mph wind and a comfort score of 77. Today's forecast high at Calistoga is 57°F, 8°F below the mid November normal of 65°F. No fog in the forecast for today at Calistoga. In November, 27% of morning hours here are foggy on average. The best window today is 2 PM to 5 PM, at about 49°F with a 4 mph wind (comfort 58).
July is the warmest month at Calistoga, with an average high of 89°F. December is the coldest, with an average low of 37°F. December is the wettest month (7.3 in.), out of about 35.0 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Calistoga are September, October, and May. The best hours are usually 9 AM to noon in September, 11 AM to 2 PM in October, and 11 AM to 2 PM in May.
Calistoga is the far end of the Napa Valley's sea breeze. Cool air from San Pablo Bay works north up the valley on summer afternoons. By the time it gets here, it has warmed over many miles of vineyards. Summer afternoons in the upper valley run far hotter than in Napa near the bay. Fog and low cloud reach Calistoga on some summer mornings, but summer middays are almost always clear.
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 Calistoga in the next few days
No active National Weather Service alerts for this location.
Fog
No fog in the forecast for today at Calistoga. In November, 27% of morning hours here are foggy on average.
Best time to go
The best window today is 2 PM to 5 PM, at about 49°F with a 4 mph wind (comfort 58).
Best day this week
Of the next 7 days, Friday looks best for Calistoga, with a 59°F high and midday comfort near 72. Wednesday looks weakest (48).
Rain
Next good chance of rain: today (84%, about 0.42 in.).
Live weather map
Weather around Calistoga right now
Overcast and 54° at Calistoga right now.
About the live weather map for Calistoga
The map centers on Calistoga 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.
Calistoga vs nearby places
Typical summer conditions compared with Calistoga, 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 Calistoga |
|---|---|---|---|---|---|
| Robert Louis Stevenson State Park | 5.5 mi | -6°F | 8% | 10 mph | less summer morning fog (8% vs 29% of morning hours) and about 38% more rain a year |
| Angwin | 7.2 mi | -2°F | 14% | 10 mph | less summer morning fog (14% vs 29% of morning hours) and 1,264 ft higher |
| St. Helena | 7.8 mi | +4°F | 24% | 7 mph | about 4°F warmer on summer afternoons |
| Boggs Mountain Demonstration State Forest | 18.7 mi | -4°F | 5% | 6 mph | less summer morning fog (5% vs 29% of morning hours) and 2,096 ft higher |
| Lake Berryessa | 19.2 mi | +4°F | 1% | 8 mph | less summer morning fog (1% vs 29% of morning hours) and about 4°F warmer on summer afternoons |
| Occidental | 23.1 mi | -11°F | 36% | 9 mph | about 11°F cooler on summer afternoons and about 34% more rain a year |
Places with a climate like Calistoga's
- Yountville (17 mi away): nearly the same temperatures every month
- Oakville (14 mi away): nearly the same temperatures every month
- Napa (25 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Calistoga climate comparisons mean
These cards compare recent conditions at Calistoga 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 Calistoga 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.
Calistoga weather by month
July is the warmest month at Calistoga, with an average high of 89°F. December is the coldest, with an average low of 37°F. December is the wettest month (7.3 in.), out of about 35.0 in. a year. Morning fog peaks in December, when fog or low cloud covers 39% of the hours from 6 to 10 AM. July has the clearest middays, with clouds covering about 4% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Calistoga are September, October, and May. The best hours are usually 9 AM to noon in September, 11 AM to 2 PM in October, and 11 AM to 2 PM in May.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 58°F | 38°F | 7.0 in | 11 | 35% | 35% | 6 mph | 9.8 h | 38 |
| Feb | 61°F | 39°F | 6.6 in | 11 | 20% | 28% | 7 mph | 10.7 h | 46 |
| Mar | 65°F | 41°F | 4.9 in | 9 | 23% | 32% | 7 mph | 11.9 h | 51 |
| Apr | 70°F | 43°F | 2.2 in | 6 | 22% | 24% | 8 mph | 13.2 h | 71 |
| May | 77°F | 48°F | 1.3 in | 5 | 25% | 19% | 9 mph | 14.3 h | 84 |
| Jun | 84°F | 52°F | 0.3 in | 2 | 19% | 6% | 9 mph | 14.9 h | 83 |
| Jul | 89°F | 54°F | 0.0 in | 0 | 32% | 4% | 9 mph | 14.6 h | 82 |
| Aug | 89°F | 54°F | 0.0 in | 1 | 35% | 6% | 8 mph | 13.6 h | 83 |
| Sep | 86°F | 52°F | 0.1 in | 2 | 30% | 10% | 8 mph | 12.3 h | 87 |
| Oct | 78°F | 47°F | 1.7 in | 5 | 25% | 16% | 6 mph | 11.1 h | 86 |
| Nov | 65°F | 41°F | 3.5 in | 8 | 27% | 22% | 6 mph | 10.0 h | 71 |
| Dec | 57°F | 37°F | 7.3 in | 11 | 39% | 38% | 6 mph | 9.5 h | 36 |
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.
What makes Calistoga's weather different
Among the 163 San Francisco Bay Area towns we track, Calistoga has the 2nd-coldest winter nights.
- #2of 163
coldest winter nightsamong San Francisco Bay Area towns
When the fog burns off
2 PMwhen December fog usually thins (43% foggy at 6 AM)
Fog or low cloud covers Calistoga in 43% of 6 AM hours in December, the foggiest month. It usually thins to a third of that by 2 PM. June mornings are the least foggy (19%).
When the wind picks up
3 PMwhen afternoon wind builds, April–September
From April through September, wind at Calistoga typically builds after 3 PM. In June it peaks around 4 PM, averaging 11 mph with 6% of those hours windy, while mornings average 5 mph.
Hot hours
4 habove 85°F on a typical July afternoon
In July, the average temperature stays at or above 85°F for 4 hours a day.
Elevation
−6°Fsummer afternoons at Robert Louis Stevenson State Park, 1,739 ft up
Robert Louis Stevenson State Park sits 1,739 ft higher, 5.5 miles away. Its summer highs average 6°F cooler and its winter lows 1°F milder than Calistoga.
Daylight
9.5–14.9 hof daylight, Dec to Jun
Days at Calistoga range from about 9.5 hours in December to 14.9 hours in June. In mid-June the sun sets around 8:37 PM, and in mid-December around 4:55 PM.
Seasons at Calistoga
- Warm seasonJun 26 – Sep 25 · highs 85°F+
The warm season lasts about 3 months, from Jun 26 to Sep 25, when the average high is 85°F or warmer. Highs peak around Jul 8 at about 89°F.
- Cool seasonNov 27 – Feb 28 · highs 63°F or lower
The cool season runs from Nov 27 to Feb 28, when the average high is 63°F or lower. The coldest nights come around Dec 8, with an average low near 37°F.
- Rainy seasonOct 27 – Apr 20 · 89% of the year's rain
The rainy season runs from Oct 27 to Apr 20, when a day has at least a 20% chance of measurable rain. That stretch brings 89% 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 19 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, Calistoga averaged 36 days a year at 90°F or hotter and 2 nights a year at or below freezing. It averaged 23 days a year with at least half an inch of rain and 1 afternoon with wind of 20 mph or more at 2 PM. About 116 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Jun 11, 2026 (102°F) and the coldest night was Feb 20, 2026 (31°F). The wettest day was Nov 21, 2024 (6.47 in.), and the strongest 2 PM gust was 40 mph on Feb 13, 2025.
- 36days at 90°F or hotter
- 2nights at or below freezing
- 23days with ½ in. of rain or more
- 1afternoon with 20+ mph wind
- 116mornings with 3+ hours of fog or low cloud
- Hottest day102°FJun 11, 2026
- Coldest night31°FFeb 20, 2026
- Wettest day6.47 inNov 21, 2024
- Strongest 2 PM gust40 mphFeb 13, 2025
What shapes Calistoga's weather
Calistoga's nights are much colder than its afternoons. Mount St. Helena to the north, the Palisades cliffs to the northeast and the Mayacamas Mountains to the west close in the head of the valley. After dark, cold air slides off those slopes and pools on the valley floor. That gives Calistoga some of the widest day-to-night temperature swings in the Bay Area, and frost forms on the coldest winter mornings.
Winter storms pile up against the south face of Mount St. Helena and drop more rain on the upper valley than on the southern end near Napa. Snow sometimes dusts the mountain above town but rarely reaches the valley floor.
The ridges around Calistoga make it a fire-weather town. Offshore winds are dry winds that blow from the interior toward the coast. In fall they can pour over the ridges northeast of town, and fires then move fast across the valley. The 2017 Tubbs Fire started just north of Calistoga, and the 2020 Glass Fire forced the whole town to evacuate again three years later.
Tips for visiting Calistoga
Catch the geyser any time of year
Old Faithful Geyser of California on Tubbs Lane erupts about every 20 to 35 minutes and is open daily year-round, rain or shine.
Save the hot springs for cool days
Calistoga's spa pools are fed by natural hot springs and stay warm as fall and winter temperatures drop.
Find redwood shade south of town
Bothe-Napa Valley State Park, 4 miles south, has redwoods along the creek in Ritchey Canyon, but State Parks warns summer temperatures there may reach 105°F.
Sign up for Alert Napa County
The Calistoga Police Department uses this free system for severe weather, road closures, and evacuations.
Calistoga through the seasons
- Spring (March–May)
- Spring brings mild days and cold nights, with frost still possible on the valley floor early in the season. State Parks calls spring and fall the best seasons at nearby Bothe-Napa Valley State Park.
- Summer (June–August)
- Summer afternoons are hot and dry, far hotter than in Napa. State Parks says summer at nearby Bothe can reach 105°F, though nights are usually cool.
- Fall (September–November)
- Fall brings warm, dry harvest weather until the first storms. It is also the season for dry offshore winds and Red Flag Warnings, the Weather Service alerts for dangerous fire weather, so keep emergency alerts turned on.
- Winter (December–February)
- Winter is the wet season. State Parks says most of the rain at nearby Bothe falls from December to March, and snow is infrequent.
Activities and the weather that matters
- Hot springs, mineral pools, and mud baths: Best on cool, gray, or rainy days from fall through spring, when the warm water feels best.
- Biking through the vineyards: Ride in the morning in summer. Spring and fall afternoons are the most comfortable.
- Watching Old Faithful Geyser: The geyser is open rain or shine, and a cool, still morning shows off the steam best.
- Wine tasting: Indoor tasting rooms are a good retreat on hot afternoons, and the valley's cool evenings suit patio sipping.
Official sources and current conditions
- City of Calistoga: Emergency Services
- Alert Napa County sign-up
- Visit Calistoga
- California State Parks: Bothe-Napa Valley State Park
- National Weather Service forecast: Calistoga
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 | 77 | 62.1° / 43.1° | 6h | 7d | 16.47" | 17 |
| December 2024 | 70 | 60.4° / 43.6° | 4.8h | 12d | 8.53" | 13 |
| January 2025 | 82 | 61.6° / 41.1° | 7.1h | 9d | 0.46" | 20 |
| February 2025 | 73 | 61.1° / 42° | 6.1h | 7d | 11.81" | 14 |
| March 2025 | 79 | 61.5° / 42.6° | 7.5h | 7d | 4.54" | 17 |
| April 2025 | 88 | 68.8° / 46.1° | 9.6h | 10d | 0.59" | 24 |
| May 2025 | 94 | 78.6° / 50.1° | 12.5h | 1d | 0.13" | 31 |
| June 2025 | 94 | 81.8° / 51.3° | 12.8h | 1d | 0" | 30 |
| July 2025 | 91 | 82.3° / 53.8° | 12.3h | 7d | 0" | 31 |
| August 2025 | 89 | 89° / 55.6° | 11.5h | 5d | 0" | 29 |
| September 2025 | 89 | 82.4° / 57.1° | 9.8h | 5d | 0.1" | 28 |
| October 2025 | 85 | 72.1° / 51.5° | 7.3h | 10d | 1.2" | 24 |
| November 2025 | 78 | 63.8° / 48.1° | 6.4h | 13d | 5.25" | 13 |
| December 2025 | 65 | 56.8° / 44.1° | 4.9h | 22d | 8.56" | 5 |
| January 2026 | 80 | 63.5° / 43.6° | 6.7h | 6d | 5.73" | 22 |
| February 2026 | 77 | 63.9° / 44.9° | 6.2h | 7d | 5.51" | 14 |
| March 2026 | 94 | 78.5° / 49.9° | 9.8h | 2d | 0.04" | 30 |
| April 2026 | 85 | 68° / 46.4° | 9.1h | 4d | 5.51" | 22 |
| May 2026 | 91 | 75.7° / 51.6° | 11.8h | 6d | 1.01" | 29 |
| June 2026 | 93 | 82.5° / 54.4° | 12.8h | 2d | 0" | 29 |
| July 2026 | 90 | 86.8° / 55.4° | 12h | 3d | 0" | 30 |
| August 2026 | 87 | 86.9° / 54.5° | 11.1h | 13d | 0" | 28 |
| September 2026 | 89 | 82.3° / 54° | 9.8h | 10d | 0.37" | 27 |
| October 2026 | 87 | 80.3° / 49.2° | 8.4h | 2d | 0.05" | 24 |
Climate Trends
Average Temperature by Month
About the Calistoga climate charts
The temperature chart compares average monthly highs and lows at Calistoga, 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 Calistoga. 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 Calistoga, the warmest typical hour is 3 PM in August (88°F). The coldest is 7 AM in December (46°F).
- Fog: Fog or low cloud covers Calistoga in 43% of 6 AM hours in December, the foggiest month. It usually thins to a third of that by 2 PM. June mornings are the least foggy (19%).
- Wind: From April through September, wind at Calistoga typically builds after 3 PM. In June it peaks around 4 PM, averaging 11 mph with 6% of those hours windy, while mornings average 5 mph.
- Cloud Cover: July middays are the clearest at Calistoga (4% average cloud cover), and December middays are the cloudiest (38%).
- Solar Radiation: The strongest typical sun at Calistoga comes at 1 PM in July, averaging 987 W/m².
How to read the hourly heatmaps for Calistoga
This heatmap shows how average temperature at Calistoga 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 Calistoga. 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 Calistoga 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 Calistoga 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 Calistoga 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 Calistoga
- October 2026 recap: October 2026 at Calistoga averaged a high of 80°F, 8°F warmer than October 2025 (72°F).
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 33.2 in. of rain to Calistoga, 95% of the 35.0 in. normal.
Location Details
Calistoga weather questions
Everything you need to know about weather and visiting Calistoga
What is the weather like at Calistoga today?
It's 54°F at Calistoga right now, with a comfort score of 77 (great). Today's forecast high at Calistoga is 57°F, 8°F below the mid November normal of 65°F. The best window today is 2 PM to 5 PM, at about 49°F with a 4 mph wind (comfort 58).
What is the best month to visit Calistoga?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Calistoga are September, October, and May. The best hours are usually 9 AM to noon in September, 11 AM to 2 PM in October, and 11 AM to 2 PM in May. The warm season lasts about 3 months, from Jun 26 to Sep 25, when the average high is 85°F or warmer. Highs peak around Jul 8 at about 89°F.
What are the warmest and coldest months at Calistoga?
July is the warmest month at Calistoga, with an average high of 89°F. December is the coldest, with an average low of 37°F.
When does the fog burn off at Calistoga?
Fog or low cloud covers Calistoga in 43% of 6 AM hours in December, the foggiest month. It usually thins to a third of that by 2 PM. June mornings are the least foggy (19%).
When is it windiest at Calistoga?
From April through September, wind at Calistoga typically builds after 3 PM. In June it peaks around 4 PM, averaging 11 mph with 6% of those hours windy, while mornings average 5 mph.
How much rain does Calistoga get?
December is the wettest month (7.3 in.), out of about 35.0 in. a year. The rainy season runs from Oct 27 to Apr 20, when a day has at least a 20% chance of measurable rain. That stretch brings 89% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 33.2 in. of rain to Calistoga, 95% of the 35.0 in. normal.
How does Calistoga weather compare with Robert Louis Stevenson State Park?
Robert Louis Stevenson State Park sits 1,739 ft higher, 5.5 miles away. Its summer highs average 6°F cooler and its winter lows 1°F milder than Calistoga.
What kind of place is Calistoga?
Calistoga sits at the narrow northern head of the Napa Valley. Here the valley floor runs out against Mount St. Helena, and Highway 29 starts its climb toward Lake County. Hot mineral water rises beneath Calistoga and feeds its spas, mud baths and naturally heated pools. The Old Faithful Geyser of California erupts just north of downtown on Tubbs Lane. It is the last town before the road reaches Robert Louis Stevenson State Park.
What is Calistoga weather like in November?
November at Calistoga averages a high of 65°F and a low of 41°F, with 3.5 in. of rain over about 8 rainy days. About 27% of morning hours are foggy. Afternoon wind averages 6 mph.
More about Calistoga weather
Guides that explain the weather here and nearby
- Napa Valley Weather Guide: Best Times to Visit and What to Expect
- Napa Weather in March: Late Rains, Wildflowers, and Shoulder Season Perks
- Napa Weather in October: Peak Harvest Season and What It Means for Visitors
- Sonoma Weather Guide: How Wine Country's Climate Differs from Napa
- Wine Country Harvest Season Weather: Napa and Sonoma Crush Guide
- Santa Rosa Weather: Climate, Fire Season and the Coastal Divide
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.
- Old Faithful Geyser of California (accessed 2026-10-27)
- Visit Calistoga (city visitor guide) (accessed 2026-10-27)
- California State Parks, Bothe-Napa Valley State Park (accessed 2026-10-27)
- City of Calistoga, Sign Up for Alert Napa County (accessed 2026-10-27)
Rendered 2026-11-15T12:16:24.471Z.