2025 Compare Climate & Weather:
San Mateo, CA vs San Jose, CA

Highlights

On average, there are 257 sunny days per year in San Jose. San Mateo averages 265 sunny days per year. The US average is 205 sunny days.

San Jose, California gets 17.2 inches of rain, on average, per year. San Mateo, California gets 24.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

San Jose averages 0 inches of snow per year. San Mateo averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

San Jose, California
Summer High: the July high is around 81.9 degrees
Winter Low: the January low is 41.6
Rain: averages 17.2 inches of rain a year
Snow: averages 0 inches of snow a year

San Mateo, California
Summer High: the July high is around 74.1 degrees
Winter Low: the January low is 42.2
Rain: averages 24.4 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

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

Today's Weather - San Mateo, CA

54°F

Today's Weather - San Jose, CA

57°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Mateo / San Jose

August is the hottest month for San Mateo with an average high temperature of 74.5°, which ranks it as one of the coolest places in California. In San Mateo, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Mateo are August, September and July.

August is the hottest month for San Jose with an average high temperature of 81.9°, which ranks it as cooler than most places in California. In San Jose, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Jose are June, September and May.

January has the coldest nighttime temperatures for San Mateo with an average of 42.2°. This is warmer than most places in California.

December has the coldest nighttime temperatures for San Jose with an average of 41.5°. This is warmer than most places in California.

In San Mateo, there are 9.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Jose, there are 16.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Mateo, there are 4.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In San Jose, there are 4.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In San Mateo, 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 San Jose, 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 Mateo with 4.8 inches of rain, and the driest month is July with 0.1 inches. The wettest season is Spring with 57% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 24.4 inches in San Mateo means that it is wetter than most places in California.


February is the wettest month in San Jose with 3.5 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 17.2 inches in San Jose means that it is about average compared to other places in California.

January is the rainiest month in San Mateo with 11.6 days of rain, and July is the driest month with only 1.7 rainy days. There are 76.9 rainy days annually in San Mateo, which is rainier than most places in California. The rainiest season is Spring when it rains 44% of the time and the driest is Autumn with only a 7% chance of a rainy day.

December is the rainiest month in San Jose with 10.3 days of rain, and July is the driest month with only 0.2 rainy days. There are 61.8 rainy days annually in San Jose, which is rainier than most places in California. The rainiest season is Spring when it rains 50% 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 Mateo, ranking it as one of the least snowy places in California.

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

Any measurable snowfall is a rare occurance in San Mateo.

Any measurable snowfall is a rare occurance in San Jose.