Rohnert Park Weather
Town • San Francisco Bay Area
Rohnert Park was laid out in the 1950s as one of the first planned communities in the country. It fills the middle of the Santa Rosa Plain along Highway 101, between Cotati and Santa Rosa. Sonoma State University and its Green Music Center occupy the city's east side, where the flat neighborhoods meet the Sonoma Mountain foothills. Crane Creek Regional Park climbs into those hills. The city is also home to Graton Resort & Casino.
Plan your week
10-Day Forecast
Hour by hour
Hourly Forecast
Current Conditions
Comfort Breakdown
Rohnert Park weather today and through the year
It's 56°F at Rohnert Park right now (feels like 54°F), with 8 mph wind and a comfort score of 81. Today's forecast high at Rohnert Park is 59°F, 6°F below the mid November normal of 65°F. No fog in the forecast for today at Rohnert Park. In November, 30% of morning hours here are foggy on average. The best window today is 2 PM to 5 PM, at about 50°F with a 3 mph wind (comfort 54).
August is the warmest month at Rohnert Park, with an average high of 83°F. December is the coldest, with an average low of 38°F. December is the wettest month (6.5 in.), out of about 31.4 in. a year. By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Rohnert Park are September, June, and July. The best hours are usually 10 AM to 1 PM in September, 10 AM to 1 PM in June, and 5 PM to 8 PM in July.
Rohnert Park sits just north of the Petaluma Gap, the low break in the coast hills that lets Pacific air flow inland. Once that air clears the gap's rolling hills near Cotati, it spreads across the flat Santa Rosa Plain with nothing to slow it. Summer afternoons here are usually breezy and somewhat cooler than in Santa Rosa, which sits farther from the gap.
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 Rohnert Park in the next few days
No active National Weather Service alerts for this location.
Fog
No fog in the forecast for today at Rohnert Park. In November, 30% of morning hours here are foggy on average.
Best time to go
The best window today is 2 PM to 5 PM, at about 50°F with a 3 mph wind (comfort 54).
Best day this week
Of the next 7 days, Friday looks best for Rohnert Park, with a 60°F high and midday comfort near 73. Today looks weakest (43).
Rain
Next good chance of rain: today (82%, about 0.72 in.).
Snow
Snow is in the forecast: about 1.4 in. over the next week, starting Monday.
Live weather map
Weather around Rohnert Park right now
Overcast and 56° at Rohnert Park right now.
About the live weather map for Rohnert Park
The map centers on Rohnert Park 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.
Rohnert Park vs nearby places
Typical summer conditions compared with Rohnert Park, 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 Rohnert Park |
|---|---|---|---|---|---|
| Cotati | 1.1 mi | -1°F | 31% | 10 mph | a very similar climate |
| Santa Rosa | 7 mi | +2°F | 33% | 9 mph | a very similar climate |
| Sebastopol | 7.9 mi | same | 30% | 10 mph | a very similar climate |
| Dillon Beach | 15.7 mi | -25°F | 43% | 12 mph | about 25°F cooler on summer afternoons and windier summer afternoons (12 vs 8 mph) |
| Salmon Creek Beach | 19.9 mi | -25°F | 49% | 11 mph | about 25°F cooler on summer afternoons and about 52% more rain a year |
| Schoolhouse Beach | 20.6 mi | -25°F | 51% | 9 mph | about 25°F cooler on summer afternoons and about 68% more rain a year |
Places with a climate like Rohnert Park's
- Forestville (14 mi away): nearly the same temperatures every month
- Windsor (16 mi away): similar temperatures through the year
- Portola Redwoods State Park (80 mi away): similar temperatures through the year
Climate Dashboard
Current conditions vs. NOAA normals and recent destination baseline
What the Rohnert Park climate comparisons mean
These cards compare recent conditions at Rohnert Park 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 Rohnert Park 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.
Rohnert Park weather by month
August is the warmest month at Rohnert Park, with an average high of 83°F. December is the coldest, with an average low of 38°F. December is the wettest month (6.5 in.), out of about 31.4 in. a year. Morning fog peaks in December, when fog or low cloud covers 41% of the hours from 6 to 10 AM. June has the clearest middays, with clouds covering about 13% of the sky from 11 AM to 3 PM.
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Rohnert Park are September, June, and July. The best hours are usually 10 AM to 1 PM in September, 10 AM to 1 PM in June, and 5 PM to 8 PM in July.
| Month | Avg high | Avg low | Rain | Rainy days | Morning fog | Midday cloud | Afternoon wind | Daylight | Comfort |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 58°F | 38°F | 6.1 in | 10 | 36% | 36% | 5 mph | 9.8 h | 39 |
| Feb | 62°F | 40°F | 6.2 in | 10 | 22% | 28% | 7 mph | 10.7 h | 48 |
| Mar | 65°F | 41°F | 4.2 in | 9 | 25% | 33% | 7 mph | 11.9 h | 65 |
| Apr | 69°F | 43°F | 2.0 in | 6 | 21% | 26% | 8 mph | 13.2 h | 75 |
| May | 74°F | 47°F | 1.1 in | 4 | 20% | 24% | 9 mph | 14.3 h | 80 |
| Jun | 80°F | 50°F | 0.3 in | 2 | 24% | 13% | 9 mph | 14.8 h | 84 |
| Jul | 82°F | 51°F | 0.0 in | 0 | 40% | 13% | 8 mph | 14.6 h | 84 |
| Aug | 83°F | 51°F | 0.1 in | 1 | 37% | 13% | 8 mph | 13.6 h | 84 |
| Sep | 82°F | 50°F | 0.1 in | 2 | 34% | 16% | 8 mph | 12.3 h | 87 |
| Oct | 76°F | 47°F | 1.5 in | 5 | 28% | 19% | 7 mph | 11.1 h | 81 |
| Nov | 65°F | 41°F | 3.4 in | 8 | 30% | 23% | 5 mph | 10.0 h | 68 |
| Dec | 57°F | 38°F | 6.5 in | 11 | 41% | 41% | 5 mph | 9.5 h | 35 |
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 Rohnert Park average about 5°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 Rohnert Park has actually seen.
What makes Rohnert Park's weather different
When the fog burns off
1 PMwhen December fog usually thins (46% foggy at 7 AM)
Fog or low cloud covers Rohnert Park in 46% of 7 AM hours in December, the foggiest month. It usually thins to a third of that by 1 PM. May mornings are the least foggy (20%).
When the wind picks up
1 PMwhen afternoon wind builds, February–October
From February through October, wind at Rohnert Park typically builds after 1 PM. In June it peaks around 3 PM, averaging 9 mph with 3% of those hours windy, while mornings average 3 mph.
Daylight
9.5–14.8 hof daylight, Dec to Jun
Days at Rohnert Park range from about 9.5 hours in December to 14.8 hours in June. In mid-June the sun sets around 8:35 PM, and in mid-December around 4:56 PM.
Seasons at Rohnert Park
- Warm seasonJun 26 – Sep 28 · highs 80°F+
The warm season lasts about 3.1 months, from Jun 26 to Sep 28, when the average high is 80°F or warmer. Highs peak around Aug 8 at about 83°F.
- Cool seasonNov 28 – Feb 26 · highs 63°F or lower
The cool season runs from Nov 28 to Feb 26, when the average high is 63°F or lower. The coldest nights come around Dec 8, with an average low near 38°F.
- Rainy seasonOct 29 – Apr 15 · 88% of the year's rain
The rainy season runs from Oct 29 to Apr 15, when a day has at least a 20% chance of measurable rain. That stretch brings 88% 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 22 and half of its annual total by Jan 22.
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, Rohnert Park averaged 10 days a year at 90°F or hotter and 4 nights a year at or below freezing. It averaged 19 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 179 mornings a year had 3 or more hours of fog or low cloud.
In the same record, the hottest day was Oct 3, 2026 (98°F) and the coldest night was Feb 10, 2025 (29°F). The wettest day was Nov 21, 2024 (4.53 in.), and the strongest 2 PM gust was 41 mph on Mar 12, 2025.
- 10days at 90°F or hotter
- 4nights at or below freezing
- 19days with ½ in. of rain or more
- 1afternoon with 20+ mph wind
- 179mornings with 3+ hours of fog or low cloud
- Hottest day98°FOct 3, 2026
- Coldest night29°FFeb 10, 2025
- Wettest day4.53 inNov 21, 2024
- Strongest 2 PM gust41 mphMar 12, 2025
What shapes Rohnert Park's weather
Sonoma Mountain rises behind the university and shapes Rohnert Park's nights. It shelters the Sonoma Valley on its far side but does little for Rohnert Park, which faces the gap. On calm, clear nights cold air drains off the mountain's lower slopes and pools on the plain. The flat neighborhoods west of the freeway can be frosty or foggy at dawn in winter.
Pacific storms reach the Santa Rosa Plain with little terrain in the way. The city warns that storm season can bring heavy rain, localized flooding, strong winds, and power outages. In fall, dry offshore wind days carry the same fire risk here as elsewhere in Sonoma County.
Tips for visiting Rohnert Park
Take the train instead of Highway 101
The Sonoma-Marin Area Rail Transit (SMART) train has a Rohnert Park station, with Cotati one stop to the south and Santa Rosa Downtown to the north.
Hike Crane Creek in spring
The 128-acre county park has 3.5 miles of trails, open 7 a.m. to sunset.
Bring a jacket to summer concerts
The back wall of Weill Hall at the Green Music Center opens onto a lawn for summer concerts. Evenings on the plain cool off once the breeze arrives.
Prepare for storm-season outages
Keep flashlights, charged phones and a few days of supplies ready in winter, when storms can bring flooding and knock out power.
Rohnert Park through the seasons
- Spring (March–May)
- The foothills on the Sonoma Mountain side are green, and Crane Creek's meadows fill with wildflowers.
- Summer (June–August)
- Summer brings warm days with a dependable afternoon breeze from the Petaluma Gap, which strengthens as the inland valleys heat up. Evenings turn cool.
- Fall (September–October)
- Afternoons stay warm into September and grow calmer as the sea breeze fades. Fall is also offshore wind season, when dry wind blows from inland toward the coast.
- Winter (November–February)
- Winter brings rain, gusty storms, and occasional outages, with frost or fog on the flats on clear, calm mornings.
Activities and the weather that matters
- Hiking at Crane Creek Regional Park: Spring is best for wildflowers. On warm afternoons, the creekside trails run beneath mature oaks while the ridges are open.
- Outdoor concerts at the Green Music Center: Warm, still summer evenings are ideal. Once the gap breeze picks up, the lawn gets chilly.
- Cycling the flat city grid: The flat streets make easy riding in any dry weather, but expect a headwind riding south toward Cotati on summer afternoons.
Official sources and current conditions
- Sonoma County Regional Parks: Crane Creek Regional Park
- SMART train stations
- City of Rohnert Park: storm preparedness
- Sonoma County emergency alerts (SoCoAlert)
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 | 76 | 62.3° / 42° | 6.1h | 9d | 11.23" | 15 |
| December 2024 | 67 | 58.8° / 42.8° | 5.1h | 15d | 7.53" | 11 |
| January 2025 | 81 | 60.3° / 38.7° | 6.9h | 10d | 0.38" | 19 |
| February 2025 | 72 | 60.3° / 41.4° | 5.9h | 8d | 8.62" | 14 |
| March 2025 | 78 | 60.8° / 42.9° | 7.2h | 7d | 2.81" | 18 |
| April 2025 | 87 | 64.7° / 45.1° | 9.4h | 11d | 0.39" | 22 |
| May 2025 | 94 | 72.4° / 47.3° | 11.9h | 2d | 0.07" | 31 |
| June 2025 | 92 | 72.7° / 49.4° | 11.7h | 15d | 0" | 30 |
| July 2025 | 92 | 73.5° / 52.9° | 11.3h | 13d | 0" | 31 |
| August 2025 | 91 | 80.3° / 53.1° | 10.8h | 9d | 0" | 31 |
| September 2025 | 90 | 78.2° / 55.9° | 9.2h | 6d | 0.08" | 29 |
| October 2025 | 84 | 71.6° / 50.3° | 7.1h | 13d | 0.84" | 23 |
| November 2025 | 74 | 63.4° / 47.8° | 5.7h | 18d | 3.65" | 13 |
| December 2025 | 60 | 54.7° / 42.9° | 4h | 24d | 4.85" | 2 |
| January 2026 | 75 | 60° / 40.9° | 6.5h | 10d | 3.91" | 19 |
| February 2026 | 76 | 62.5° / 44.5° | 6.3h | 7d | 3.6" | 16 |
| March 2026 | 95 | 75.1° / 46.3° | 9.9h | 3d | 0.03" | 30 |
| April 2026 | 85 | 66.3° / 46.4° | 9.1h | 6d | 3.82" | 22 |
| May 2026 | 91 | 70.4° / 50° | 11.4h | 10d | 0.76" | 29 |
| June 2026 | 92 | 74.9° / 52.2° | 11.8h | 10d | 0" | 30 |
| July 2026 | 93 | 77.5° / 52.6° | 11.4h | 10d | 0" | 31 |
| August 2026 | 90 | 78.1° / 54.2° | 10.2h | 17d | 0" | 30 |
| September 2026 | 91 | 77.8° / 52.6° | 9.3h | 11d | 0.23" | 29 |
| October 2026 | 90 | 76.8° / 47° | 8.5h | 5d | 0.11" | 29 |
Climate Trends
Average Temperature by Month
About the Rohnert Park climate charts
The temperature chart compares average monthly highs and lows at Rohnert Park, 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 Rohnert Park. 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 Rohnert Park, the warmest typical hour is 3 PM in August (82°F). The coldest is 7 AM in February (42°F).
- Fog: Fog or low cloud covers Rohnert Park in 46% of 7 AM hours in December, the foggiest month. It usually thins to a third of that by 1 PM. May mornings are the least foggy (20%).
- Wind: From February through October, wind at Rohnert Park typically builds after 1 PM. In June it peaks around 3 PM, averaging 9 mph with 3% of those hours windy, while mornings average 3 mph.
- Cloud Cover: June middays are the clearest at Rohnert Park (13% average cloud cover), and December middays are the cloudiest (41%).
- Solar Radiation: The strongest typical sun at Rohnert Park comes at 1 PM in June, averaging 967 W/m².
How to read the hourly heatmaps for Rohnert Park
This heatmap shows how average temperature at Rohnert Park 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 Rohnert Park. 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 Rohnert Park 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 Rohnert Park 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 Rohnert Park 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 Rohnert Park
- October 2026 recap: October 2026 at Rohnert Park averaged a high of 77°F, 5°F warmer than October 2025 (72°F).
- Rain year: The 2025-26 rain year (Oct. 1 to Sep. 30) brought 21.7 in. of rain to Rohnert Park, 69% of the 31.4 in. normal.
Location Details
Rohnert Park weather questions
Everything you need to know about weather and visiting Rohnert Park
What is the weather like at Rohnert Park today?
It's 56°F at Rohnert Park right now, with a comfort score of 81 (great). Today's forecast high at Rohnert Park is 59°F, 6°F below the mid November normal of 65°F. The best window today is 2 PM to 5 PM, at about 50°F with a 3 mph wind (comfort 54).
What is the best month to visit Rohnert Park?
By typical temperature, wind, cloud, humidity, and rain odds, the most comfortable months at Rohnert Park are September, June, and July. The best hours are usually 10 AM to 1 PM in September, 10 AM to 1 PM in June, and 5 PM to 8 PM in July. The warm season lasts about 3.1 months, from Jun 26 to Sep 28, when the average high is 80°F or warmer. Highs peak around Aug 8 at about 83°F.
What are the warmest and coldest months at Rohnert Park?
August is the warmest month at Rohnert Park, with an average high of 83°F. December is the coldest, with an average low of 38°F.
When does the fog burn off at Rohnert Park?
Fog or low cloud covers Rohnert Park in 46% of 7 AM hours in December, the foggiest month. It usually thins to a third of that by 1 PM. May mornings are the least foggy (20%).
When is it windiest at Rohnert Park?
From February through October, wind at Rohnert Park typically builds after 1 PM. In June it peaks around 3 PM, averaging 9 mph with 3% of those hours windy, while mornings average 3 mph.
How much rain does Rohnert Park get?
December is the wettest month (6.5 in.), out of about 31.4 in. a year. The rainy season runs from Oct 29 to Apr 15, when a day has at least a 20% chance of measurable rain. That stretch brings 88% of the year's rain. The 2025-26 rain year (Oct. 1 to Sep. 30) brought 21.7 in. of rain to Rohnert Park, 69% of the 31.4 in. normal.
What kind of place is Rohnert Park?
Rohnert Park was laid out in the 1950s as one of the first planned communities in the country. It fills the middle of the Santa Rosa Plain along Highway 101, between Cotati and Santa Rosa. Sonoma State University and its Green Music Center occupy the city's east side, where the flat neighborhoods meet the Sonoma Mountain foothills. Crane Creek Regional Park climbs into those hills. The city is also home to Graton Resort & Casino.
What is Rohnert Park weather like in November?
November at Rohnert Park averages a high of 65°F and a low of 41°F, with 3.4 in. of rain over about 8 rainy days. About 30% of morning hours are foggy. Afternoon wind averages 5 mph.
More about Rohnert Park weather
Guides that explain the weather here and nearby
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.
- SMART (Sonoma-Marin Area Rail Transit), Stations (accessed 2026-10-27)
- Sonoma County Regional Parks, Crane Creek Regional Park (accessed 2026-10-27)
- Sonoma County Tourism, Rohnert Park (accessed 2026-10-27)
- City of Rohnert Park, storm preparedness alert (accessed 2026-10-27)
- TTB final rule establishing the Petaluma Gap viticultural area, Federal Register, Dec. 7, 2017 (accessed 2026-10-27)
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