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Rohnert Park weather

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Rohnert Park weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Rohnert Park weather in numbers

measured normals and 10 years of recorded weather

Rohnert Park swings 39°F across the year, from 78°F highs in August to 39°F lows in December, and December is usually the wettest month in a year that brings about 34 in of precipitation. Over 10 years of recorded weather it averages 87 days a year at 77°F or above, 23 of them at 86°F or above, 5 frost nights, and rain on 61 days.

Warmest month
August
78°F average high
Coldest month
December
39°F average low
Wettest month
December
34 in a year
Comfortable
4 months
March, April, May and June
Residents
42,000
share this forecast
Most accurate here
European
94/100 CheckWeather Score
Warm days
87 days
a year at 77°F or above
Frost nights
5 nights
a year below 32°F
Rain days
61 days
a year with 0.04 in or more

Day counts are from the ERA5 reanalysis for Rohnert Park’s grid square, 2016 to 2025, counted the same way for every city so the numbers compare. A reanalysis square is an area, not a weather station, so it is good for counting days and not for a single day’s record.

The weather map: all three models at once

NWS, American, European side by side around Rohnert Park and nearby towns.Live rain radar →
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Rohnert Park hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Rohnert Park 10-day forecast, out to 14 days

where the models agree, and where they split

Rohnert Park, California (CA) is at its warmest in Aug (average highs near 78°F) and coldest in Dec (lows around 39°F), with roughly 34 in of precipitation across the year. Below, compare what NWS, American, European forecast for Rohnert Park right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Rohnert Park climate by month

average daytime high and overnight low across a typical year (1991-2020)
Jan
56°
41°
Feb
59°
41°
Mar
60°
44°
Apr
65°
44°
May
69°
48°
Jun
75°
52°
Jul
77°
50°
Aug
78°
53°
Sep
78°
54°
Oct
74°
48°
Nov
64°
44°
Dec
55°
39°

Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.

How the weather around Rohnert Park has changed since 1995

Rohnert Park sits in the same roughly 50 km square of NASA's reanalysis as Santa Rosa. That square ran 0.9°F warmer in 2015-2024 than in 1995-2004. See the full 30-year picture on the Santa Rosa page.

Which forecast is most accurate in Rohnert Park?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
94
/100rank #1
87±1.3°F97±1.1 mph100100% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
88
/100rank #2
75±2.5°F94±1.8 mph100100% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Common questions

What's the weather in Rohnert Park today?
On this page we show what NWS, American, European each forecast for Rohnert Park today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Rohnert Park today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Rohnert Park and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Rohnert Park?
Over the last 30 days, the European model has been the most accurate for Rohnert Park (CheckWeather Score 94/100), ahead of the American at 88. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Rohnert Park?
August is typically the warmest month in Rohnert Park, with average highs around 78°F.
How cold does Rohnert Park get?
The coldest month in Rohnert Park is December, when overnight lows average about 39°F.
How much rain does Rohnert Park get?
Rohnert Park sees roughly 34 in of precipitation a year, with December usually the wettest month.

Nearby

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