2024 Compare Climate & Weather:
Petaluma, CA vs St. Louis, MO
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Highlights
On average, there are 202 sunny days per year in St. Louis. Petaluma averages 260 sunny days per year. The US average is 205 sunny days.
St. Louis, Missouri gets 42.2 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.
St. Louis averages 15.5 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
St. Louis, Missouri
Summer High: the July high is around 88.5 degrees
Winter Low: the January low is 22.8
Rain: averages 42.2 inches of rain a year
Snow: averages 15.5 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
St. LouisThe annual BestPlaces Comfort Index for St. Louis is 7.2 (10=best), which means it is more comfortable than most places in Missouri.
7.2 / 10
September, May and October are the most pleasant months in St. Louis, while January and December are the least comfortable months.
PetalumaThe 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
8 AM PST
Patchy Fog then Mostly Sunny
52°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Today | Patchy Fog then Mostly Sunny | 74° / 49° | SSW 2 to 8 mph |
| Saturday | Areas Of Fog then Mostly Sunny | 70° / 46° | WSW 2 to 9 mph |
| Sunday | Patchy Fog then Sunny | 74° / 47° | W 2 to 10 mph |
| Monday | Sunny | 78° / 49° | WNW 2 to 9 mph |
| Tuesday | Sunny | 79° / 49° | W 2 to 10 mph |
| Wednesday | Sunny | 76° / 47° | W 3 to 13 mph |
| Thursday | Sunny | 75° / 47° | W 5 to 12 mph |
Today's Weather - St. Louis, MO
8 AM PST
Partly Sunny then Scattered Showers And Thunderstorms
74°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Today | Partly Sunny then Scattered Showers And Thunderstorms | 80° / 62° | S 5 mph |
| Saturday | Patchy Fog then Sunny | 85° / 65° | SW 3 mph |
| Sunday | Sunny | 89° / 68° | SW 5 mph |
| Monday | Mostly Sunny then Slight Chance Showers And Thunderstorms | 88° / 71° | S 6 to 10 mph |
| Tuesday | Chance Showers And Thunderstorms | 91° / 66° | S 7 to 12 mph |
| Wednesday | Chance Showers And Thunderstorms | 85° / 61° | W 10 mph |
| Thursday | Slight Chance Rain Showers | 82° / 64° | SW 8 mph |
Average Monthly High / Low (°F)
| Month | Petaluma, CA | St. Louis, MO |
|---|
| January | 57° / 39° | 40° / 23° |
| February | 62° / 41° | 45° / 27° |
| March | 66° / 42° | 56° / 36° |
| April | 70° / 44° | 67° / 46° |
| May | 74° / 48° | 76° / 56° |
| June | 81° / 51° | 85° / 65° |
| July | 84° / 53° | 89° / 69° |
| August | 84° / 53° | 88° / 68° |
| September | 83° / 51° | 80° / 59° |
| October | 77° / 48° | 69° / 47° |
| November | 66° / 42° | 56° / 37° |
| December | 57° / 38° | 43° / 27° |
Hot, Freezing, Rainy, Snowy Days: Petaluma / St. Louis
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 5 / 25 | 13 / 8 | 0 / 3 |
| February | 0 / 0 | 2 / 20 | 12 / 7 | 0 / 2 |
| March | 0 / 0 | 1 / 12 | 11 / 10 | 0 / 1 |
| April | 0 / 0 | 0 / 2 | 7 / 11 | 0 / 0 |
| May | 2 / 1 | 0 / 0 | 4 / 11 | 0 / 0 |
| June | 5 / 7 | 0 / 0 | 1 / 9 | 0 / 0 |
| July | 6 / 13 | 0 / 0 | 0 / 8 | 0 / 0 |
| August | 7 / 11 | 0 / 0 | 0 / 8 | 0 / 0 |
| September | 7 / 3 | 0 / 0 | 2 / 7 | 0 / 0 |
| October | 2 / 0 | 0 / 2 | 4 / 8 | 0 / 0 |
| November | 0 / 0 | 2 / 10 | 10 / 9 | 0 / 1 |
| December | 0 / 0 | 7 / 22 | 12 / 9 | 0 / 3 |
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.
July is the hottest month for St. Louis with an average high temperature of 88.5°, which ranks it as about average compared to other places in Missouri. In St. Louis, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for St. Louis are May, September 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.
January has the coldest nighttime temperatures for St. Louis with an average of 22.8°. This is warmer than most places in Missouri.
In Petaluma, there are 28.1 days annually when the high temperature is over 90°, which is cooler than most places in California.
In St. Louis, there are 36.0 days annually when the high temperature is over 90°, which is hotter than most places in Missouri.
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 St. Louis, there are 91.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.
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 St. Louis, there are 1.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Missouri.
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.
May is the wettest month in St. Louis with 4.8 inches of rain, and the driest month is February with 2.3 inches. The wettest season is Summer with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 42.2 inches in St. Louis means that it is drier than most places in Missouri.
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.
May is the rainiest month in St. Louis with 11.3 days of rain, and September is the driest month with only 7.0 rainy days. There are 105.3 rainy days annually in St. Louis, which is rainier than most places in Missouri. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 23% chance of a rainy day.
There is rarely any recorded snowfall in Petaluma, ranking it as one of the least snowy places in California.
An annual snowfall of 15.5 inches in St. Louis means that it is snowier than most places in Missouri.
Any measurable snowfall is a rare occurance in Petaluma.
January is the snowiest month in St. Louis with 4.9 inches of snow, and 5 months of the year have significant snowfall.
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
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
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
Start Your Review of Petaluma
Reviews for St. Louis 2 Reviews
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
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
Start Your Review of St. Louis
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