2025 Compare Climate & Weather:
San Carlos, CA vs Palo Alto, CA

Highlights

On average, there are 261 sunny days per year in Palo Alto. San Carlos averages 264 sunny days per year. The US average is 205 sunny days.

Palo Alto, California gets 17.3 inches of rain, on average, per year. San Carlos, California gets 26.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Palo Alto averages 0 inches of snow per year. San Carlos averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Palo Alto, California
Summer High: the July high is around 79.8 degrees
Winter Low: the January low is 40.5
Rain: averages 17.3 inches of rain a year
Snow: averages 0 inches of snow a year

San Carlos, California
Summer High: the July high is around 80.4 degrees
Winter Low: the January low is 38.9
Rain: averages 26.8 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

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

Today's Weather - San Carlos, CA

50°F

Today's Weather - Palo Alto, CA

51°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: San Carlos / Palo Alto

July is the hottest month for San Carlos with an average high temperature of 80.4°, which ranks it as cooler than most places in California. In San Carlos, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Carlos are June, September and August.

July is the hottest month for Palo Alto with an average high temperature of 79.8°, which ranks it as cooler than most places in California. In Palo Alto, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Palo Alto are June, September and August.

December has the coldest nighttime temperatures for San Carlos with an average of 38.5°. This is about average compared to other places in California.

December has the coldest nighttime temperatures for Palo Alto with an average of 40.2°. This is warmer than most places in California.

In San Carlos, there are 22.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Palo Alto, there are 13.0 days annually when the high temperature is over 90°, which is cooler than most places in California.

In San Carlos, there are 15.2 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in California.

In Palo Alto, there are 7.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In San Carlos, 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 Palo Alto, 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 Carlos with 5.3 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 58% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 26.8 inches in San Carlos means that it is wetter than most places in California.


February is the wettest month in Palo Alto with 3.5 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 58% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 17.3 inches in Palo Alto means that it is about average compared to other places in California.

January is the rainiest month in San Carlos with 11.0 days of rain, and July is the driest month with only 0.9 rainy days. There are 70.1 rainy days annually in San Carlos, which is rainier than most places in California. The rainiest season is Spring when it rains 46% of the time and the driest is Autumn with only a 5% chance of a rainy day.

January is the rainiest month in Palo Alto with 10.2 days of rain, and July is the driest month with only 0.1 rainy days. There are 60.6 rainy days annually in Palo Alto, which is about average compared to other 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 Carlos, ranking it as one of the least snowy places in California.

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

Any measurable snowfall is a rare occurance in San Carlos.

Any measurable snowfall is a rare occurance in Palo Alto.