2025 Compare Climate & Weather:
San Luis Obispo, CA vs Santa Rosa, CA

Highlights

On average, there are 256 sunny days per year in Santa Rosa. San Luis Obispo averages 287 sunny days per year. The US average is 205 sunny days.

Santa Rosa, California gets 38.2 inches of rain, on average, per year. San Luis Obispo, California gets 20 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. San Luis Obispo 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

San Luis Obispo, California
Summer High: the July high is around 73.7 degrees
Winter Low: the January low is 42.8
Rain: averages 20 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for San Luis Obispo is 8.8 (10=best), which means it is more comfortable than most places in California.

Today's Weather - San Luis Obispo, CA

50°F

Today's Weather - Santa Rosa, CA

48°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Luis Obispo / Santa Rosa

September is the hottest month for San Luis Obispo with an average high temperature of 75.3°, which ranks it as one of the coolest places in California. In San Luis Obispo, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Luis Obispo are September, August and July.

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 San Luis Obispo with an average of 42.2°. This is warmer than most 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 San Luis Obispo, there are 6.3 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 San Luis Obispo, there are 3.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most 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 San Luis Obispo, 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.

February is the wettest month in San Luis Obispo with 4.2 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 59% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 20.0 inches in San Luis Obispo means that it is about average compared to other 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.

February is the rainiest month in San Luis Obispo with 9.2 days of rain, and July is the driest month with only 0.4 rainy days. There are 50.5 rainy days annually in San Luis Obispo, which is about average compared to other places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 3% 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 San Luis Obispo, 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 San Luis Obispo.

Any measurable snowfall is a rare occurance in Santa Rosa.