2025 Compare Climate & Weather:
Petaluma, CA vs Santa Rosa, CA

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Highlights

On average, there are 256 sunny days per year in Santa Rosa. Petaluma averages 260 sunny days per year. The US average is 205 sunny days.

Santa Rosa, California gets 38.2 inches of rain, on average, per year. Petaluma, California gets 29.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Santa Rosa averages 0 inches of snow per year. Petaluma averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Santa Rosa, California
Summer High: the July high is around 83.8 degrees
Winter Low: the January low is 38
Rain: averages 38.2 inches of rain a year
Snow: averages 0 inches of snow a year

Petaluma, California
Summer High: the July high is around 83.7 degrees
Winter Low: the January low is 38.7
Rain: averages 29.8 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index
Santa Rosa

The annual BestPlaces Comfort Index for Santa Rosa is 8.3 (10=best), which means it is more comfortable than most places in California.

8.3 / 10
June, August and July are the most pleasant months in Santa Rosa, while December and January are the least comfortable months.

Petaluma

The annual BestPlaces Comfort Index for Petaluma is 8.4 (10=best), which means it is more comfortable than most places in California.

8.4 / 10
June, August and July are the most pleasant months in Petaluma, while January and December are the least comfortable months.

Today's Weather - Petaluma, CA

7 PM PST

Mostly Clear

70°F

DAYDESCRIPTIONHIGH / LOWWIND
TonightMostly Clear54° / 82°WNW 9 to 13 mph
Monday NightMostly Clear51° / 74°NW 2 to 9 mph
Tuesday NightPartly Cloudy then Patchy Fog48° / 70°SW 2 to 8 mph
Wednesday NightPartly Cloudy then Patchy Fog47° / 75°WSW 2 to 8 mph
Thursday NightPartly Cloudy then Patchy Fog47° / 79°W 1 to 7 mph
Friday NightMostly Clear49° / 80°W 2 to 7 mph
Saturday NightPartly Cloudy49° / 75°W 3 to 8 mph
Today's Weather - Santa Rosa, CA

7 PM PST

Clear

72°F

DAYDESCRIPTIONHIGH / LOWWIND
TonightClear55° / 84°NNW 8 to 12 mph
Monday NightMostly Clear54° / 76°NNW 2 to 10 mph
Tuesday NightMostly Clear then Areas Of Fog48° / 72°SW 1 to 6 mph
Wednesday NightMostly Clear then Patchy Fog49° / 78°W 1 to 6 mph
Thursday NightMostly Clear50° / 82°WNW 1 to 6 mph
Friday NightMostly Clear51° / 83°W 1 to 6 mph
Saturday NightPartly Cloudy51° / 78°W 2 to 7 mph
Average Monthly High / Low (°F)
MonthPetaluma, CASanta Rosa, CA
January57° / 39°58° / 38°
February62° / 41°62° / 40°
March66° / 42°66° / 42°
April70° / 44°70° / 43°
May74° / 48°75° / 47°
June81° / 51°81° / 50°
July84° / 53°84° / 52°
August84° / 53°84° / 52°
September83° / 51°84° / 50°
October77° / 48°77° / 46°
November66° / 42°66° / 42°
December57° / 38°58° / 38°
Hot, Freezing, Rainy, Snowy Days: Petaluma / Santa Rosa
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 05 / 713 / 130 / 0
February0 / 02 / 312 / 120 / 0
March0 / 01 / 111 / 110 / 0
April0 / 00 / 07 / 70 / 0
May2 / 20 / 04 / 40 / 0
June5 / 50 / 01 / 10 / 0
July6 / 70 / 00 / 00 / 0
August7 / 70 / 00 / 00 / 0
September7 / 70 / 02 / 20 / 0
October2 / 30 / 04 / 40 / 0
November0 / 02 / 310 / 100 / 0
December0 / 07 / 812 / 120 / 0
August is the hottest month for Petaluma with an average high temperature of 83.7°, which ranks it as cooler than most places in California. In Petaluma, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Petaluma are October, June and May.

August is the hottest month for Santa Rosa with an average high temperature of 84.1°, which ranks it as cooler than most places in California. In Santa Rosa, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Santa Rosa are October, May and June.
December has the coldest nighttime temperatures for Petaluma with an average of 38.3°. This is about average compared to other places in California.

December has the coldest nighttime temperatures for Santa Rosa with an average of 37.5°. This is about average compared to other places in California.

In Petaluma, there are 28.1 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Santa Rosa, there are 31.5 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Petaluma, there are 16.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in California.

In Santa Rosa, there are 22.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In Petaluma, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

In Santa Rosa, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

December is the wettest month in Petaluma with 5.7 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 57% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 29.8 inches in Petaluma means that it is wetter than most places in California.


December is the wettest month in Santa Rosa with 7.4 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 57% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 38.2 inches in Santa Rosa means that it is wetter than most places in California.

January is the rainiest month in Petaluma with 12.5 days of rain, and July is the driest month with only 0.2 rainy days. There are 74.8 rainy days annually in Petaluma, which is rainier than most places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 2% chance of a rainy day.

January is the rainiest month in Santa Rosa with 12.8 days of rain, and July is the driest month with only 0.2 rainy days. There are 75.7 rainy days annually in Santa Rosa, which is rainier than most places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 2% chance of a rainy day.

There is rarely any recorded snowfall in Petaluma, ranking it as one of the least snowy places in California.

There is rarely any recorded snowfall in Santa Rosa, ranking it as one of the least snowy places in California.
Any measurable snowfall is a rare occurance in Petaluma.

Any measurable snowfall is a rare occurance in Santa Rosa.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Petaluma    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Petaluma

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Reviews for Santa Rosa    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Santa Rosa

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Zips In Petaluma, California
94954, 94952
Zips In SANTA ROSA, CALIFORNIA
95403, 95407, 95404, 95401, 95409, 95405
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