2025 Compare Climate & Weather:
Mountain View, CA vs Sammamish, WA

Highlights

On average, there are 155 sunny days per year in Sammamish. Mountain View averages 256 sunny days per year. The US average is 205 sunny days.

Sammamish, Washington gets 52.7 inches of rain, on average, per year. Mountain View, California gets 15.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Sammamish averages 6.3 inches of snow per year. Mountain View averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Sammamish, Washington
Summer High: the July high is around 75.4 degrees
Winter Low: the January low is 35.3
Rain: averages 52.7 inches of rain a year
Snow: averages 6.3 inches of snow a year

Mountain View, California
Summer High: the July high is around 79.3 degrees
Winter Low: the January low is 41.1
Rain: averages 15.5 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Sammamish is 7.1 (10=best), which means it is about average compared to other places in Washington.

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

Today's Weather - Mountain View, CA

78°F

Today's Weather - Sammamish, WA

62°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Mountain View / Sammamish

August is the hottest month for Mountain View with an average high temperature of 79.3°, which ranks it as cooler than most places in California. In Mountain View, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mountain View are June, September and July.

August is the hottest month for Sammamish with an average high temperature of 76.0°, which ranks it as cooler than most places in Washington. In Sammamish, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sammamish are August, July and September.

December has the coldest nighttime temperatures for Mountain View with an average of 40.9°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Sammamish with an average of 33.9°. This is warmer than most places in Washington.

In Mountain View, there are 11.7 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Sammamish, there are 3.1 days annually when the high temperature is over 90°, which is about average compared to other places in Washington.

In Mountain View, there are 5.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Sammamish, there are 42.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.

In Mountain View, 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 Sammamish, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

February is the wettest month in Mountain View with 3.1 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 15.5 inches in Mountain View means that it is drier than most places in California.


November is the wettest month in Sammamish with 8.6 inches of rain, and the driest month is July with 1.2 inches. The wettest season is Spring with 36% of yearly precipitation and 10% occurs in Autumn, which is the driest season. The annual rainfall of 52.7 inches in Sammamish means that it is wetter than most places in Washington.

February is the rainiest month in Mountain View with 10.4 days of rain, and July is the driest month with only 0.2 rainy days. There are 61.6 rainy days annually in Mountain View, 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.

November is the rainiest month in Sammamish with 20.4 days of rain, and August is the driest month with only 5.7 rainy days. There are 173.5 rainy days annually in Sammamish, which is rainier than most places in Washington. The rainiest season is Spring when it rains 31% of the time and the driest is Autumn with only a 14% chance of a rainy day.

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

An annual snowfall of 6.3 inches in Sammamish means that it is about average compared to other places in Washington.

Any measurable snowfall is a rare occurance in Mountain View.

December is the snowiest month in Sammamish with 2.0 inches of snow, and 5 months of the year have significant snowfall.