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2024 Compare Climate & Weather:
San Francisco, CA vs Petaluma, CA

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Highlights

On average, there are 260 sunny days per year in Petaluma. San Francisco averages 259 sunny days per year. The US average is 205 sunny days.

Petaluma, California gets 29.8 inches of rain, on average, per year. San Francisco, California gets 24.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Petaluma averages 0 inches of snow per year. San Francisco averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.


Weather Highlights

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

San Francisco, California
Summer High:
the July high is around 67.2 degrees
Winter Low: the January low is 45.5
Rain: averages 24.6 inches of rain a year
Snow: averages 0 inches of snow a year


BESTPLACES COMFORT INDEX
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.

San Francisco

The annual BestPlaces Comfort Index for San Francisco is 8.5 (10=best), which means it is more comfortable than most places in California.

8.5 / 10
September, August and October are the most pleasant months in San Francisco, while January and December are the least comfortable months.


Today's Weather - San Francisco, CA

3 PM PST

Sunny

54°F

DAYDESCRIPTIONHIGH / LOWWIND
This AfternoonSunny54° / 49°NW 36 mph
TuesdaySunny53° / 50°NW 31 to 38 mph
WednesdaySunny55° / 51°NW 21 to 32 mph
ThursdaySunny55° / 50°NW 22 to 28 mph
FridayMostly Sunny54° / 50°NW 20 to 23 mph
SaturdaySlight Chance Light Rain54° / 49°WNW 18 mph
SundayMostly Sunny55° / 50°NW 17 mph

Today's Weather - Petaluma, CA

3 PM PST

Sunny

69°F

DAYDESCRIPTIONHIGH / LOWWIND
This AfternoonSunny71° / 43°WNW 21 mph
TuesdaySunny71° / 44°WNW 10 to 20 mph
WednesdaySunny76° / 48°NW 14 mph
ThursdaySunny77° / 49°WNW 7 to 14 mph
FridaySunny76° / 49°W 6 to 14 mph
SaturdaySlight Chance Rain64° / 45°W 9 to 17 mph
SundayMostly Sunny65° / 46°W 8 to 14 mph

Average Monthly High / Low (°F)
MonthSan Francisco, CAPetaluma, CA
January58° / 46°57° / 39°
February60° / 47°62° / 41°
March62° / 49°66° / 42°
April63° / 50°70° / 44°
May65° / 52°74° / 48°
June67° / 54°81° / 51°
July67° / 55°84° / 53°
August69° / 56°84° / 53°
September70° / 56°83° / 51°
October69° / 54°77° / 48°
November64° / 50°66° / 42°
December58° / 46°57° / 38°

Hot, Freezing, Rainy, Snowy Days: San Francisco / Petaluma
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 00 / 512 / 130 / 0
February0 / 00 / 211 / 120 / 0
March0 / 00 / 111 / 110 / 0
April0 / 00 / 06 / 70 / 0
May0 / 20 / 04 / 40 / 0
June0 / 50 / 02 / 10 / 0
July0 / 60 / 01 / 00 / 0
August0 / 70 / 01 / 00 / 0
September1 / 70 / 02 / 20 / 0
October0 / 20 / 04 / 40 / 0
November0 / 00 / 29 / 100 / 0
December0 / 00 / 712 / 120 / 0
September is the hottest month for San Francisco with an average high temperature of 69.9°, which ranks it as one of the coolest places in California. In San Francisco, there are 0 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Francisco are September, October and August.

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.


January has the coldest nighttime temperatures for San Francisco with an average of 45.5°. This is one of the warmest places in California.

December has the coldest nighttime temperatures for Petaluma with an average of 38.3°. This is about average compared to other places in California.



In San Francisco, there are 1.9 days annually when the high temperature is over 90°, which is one of the coolest 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 San Francisco, there are 0.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest 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 San Francisco, 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 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.



January is the wettest month in San Francisco with 4.8 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 24.6 inches in San Francisco means that it is wetter than most 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 rainiest month in San Francisco with 11.7 days of rain, and July is the driest month with only 0.6 rainy days. There are 72.3 rainy days annually in San Francisco, which is rainier than most places in California. The rainiest season is Spring when it rains 48% of the time and the driest is Autumn with only a 4% chance of a rainy day.

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.



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

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



Any measurable snowfall is a rare occurance in San Francisco.

Any measurable snowfall is a rare occurance in Petaluma.


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 San Francisco    2 Reviews

Over 15 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

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Over 15 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

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Reviews for Petaluma    2 Reviews

Over 15 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

Over 15 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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ZIPS IN SAN FRANCISCO, CALIFORNIA
94112, 94110, 94122, 94109, 94116, 94121, 94117, 94134, 94118, 94115, 27 total
ZIPS IN PETALUMA, CALIFORNIA
94954, 94952

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