2025 Compare Climate & Weather:
Portola Valley, CA vs Saratoga, CA

Highlights

On average, there are 257 sunny days per year in Saratoga. Portola Valley averages 262 sunny days per year. The US average is 205 sunny days.

Saratoga, California gets 33.7 inches of rain, on average, per year. Portola Valley, California gets 30.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Saratoga averages 0 inches of snow per year. Portola Valley averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Saratoga, California
Summer High: the July high is around 85.9 degrees
Winter Low: the January low is 37.7
Rain: averages 33.7 inches of rain a year
Snow: averages 0 inches of snow a year

Portola Valley, California
Summer High: the July high is around 77.2 degrees
Winter Low: the January low is 40.8
Rain: averages 30.7 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

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

Today's Weather - Portola Valley, CA

52°F

Today's Weather - Saratoga, CA

53°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Portola Valley / Saratoga

August is the hottest month for Portola Valley with an average high temperature of 77.6°, which ranks it as cooler than most places in California. In Portola Valley, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Portola Valley are August, September and July.

July is the hottest month for Saratoga with an average high temperature of 85.9°, which ranks it as cooler than most places in California. In Saratoga, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Saratoga are October, May and June.

December has the coldest nighttime temperatures for Portola Valley with an average of 40.7°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Saratoga with an average of 37.5°. This is about average compared to other places in California.

In Portola Valley, there are 19.7 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Saratoga, there are 35.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Portola Valley, there are 14.8 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in California.

In Saratoga, there are 21.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In Portola Valley, 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 Saratoga, 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 Portola Valley with 6.0 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 30.7 inches in Portola Valley means that it is wetter than most places in California.


January is the wettest month in Saratoga with 6.9 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 33.7 inches in Saratoga means that it is wetter than most places in California.

February is the rainiest month in Portola Valley with 11.2 days of rain, and July is the driest month with only 1.0 rainy days. There are 72.9 rainy days annually in Portola Valley, which is rainier than most places in California. The rainiest season is Spring when it rains 45% of the time and the driest is Autumn with only a 6% chance of a rainy day.

January is the rainiest month in Saratoga with 11.0 days of rain, and July is the driest month with only 0.2 rainy days. There are 64.8 rainy days annually in Saratoga, 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 3% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in Portola Valley.

Any measurable snowfall is a rare occurance in Saratoga.