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2024 Compare Climate & Weather:
Seattle, WA vs Sunnyvale, CA

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Highlights

On average, there are 260 sunny days per year in Sunnyvale. Seattle averages 152 sunny days per year. The US average is 205 sunny days.

Sunnyvale, California gets 15.4 inches of rain, on average, per year. Seattle, Washington gets 38 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Sunnyvale averages 0 inches of snow per year. Seattle averages 4.6 inches of snow per year. The US average is 27.8 inches of snow per year.


Weather Highlights

Sunnyvale, California
Summer High:
the July high is around 80.3 degrees
Winter Low: the January low is 42.3
Rain: averages 15.4 inches of rain a year
Snow: averages 0 inches of snow a year

Seattle, Washington
Summer High:
the July high is around 75.8 degrees
Winter Low: the January low is 37
Rain: averages 38 inches of rain a year
Snow: averages 4.6 inches of snow a year


BESTPLACES COMFORT INDEX
Sunnyvale

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

8.8 / 10
August, July and September are the most pleasant months in Sunnyvale, while January and December are the least comfortable months.

Seattle

The annual BestPlaces Comfort Index for Seattle is 7.5 (10=best), which means it is one of the most pleasant places in Washington.

7.5 / 10
August, July and September are the most pleasant months in Seattle, while December and January are the least comfortable months.


Today's Weather - Seattle, WA

9 AM PST

Mostly Cloudy then Slight Chance Light Rain

51°F

DAYDESCRIPTIONHIGH / LOWWIND
TodayMostly Cloudy then Slight Chance Light Rain67° / 50°SSW 5 to 8 mph
SaturdayLight Rain Likely55° / 47°WSW 8 mph
SundayLight Rain Likely54° / 48°S 8 to 14 mph
MondayShowers And Thunderstorms55° / 43°SSW 15 mph
TuesdayChance Light Rain57° / 44°SW 9 mph
WednesdayMostly Sunny59° / 44°SW 9 mph
ThursdaySunny64° / 48°NNE 6 to 12 mph

Today's Weather - Sunnyvale, CA

9 AM PST

Sunny

54°F

DAYDESCRIPTIONHIGH / LOWWIND
TodaySunny74° / 52°NW 3 to 15 mph
SaturdayRain61° / 44°SSW 6 to 16 mph
SundaySunny62° / 43°WNW 6 to 17 mph
MondaySunny67° / 48°WNW 6 to 15 mph
TuesdaySunny70° / 47°NW 7 to 15 mph
WednesdaySunny75° / 50°NW 5 to 15 mph
ThursdaySunny79° / 52°NNW 6 to 14 mph

Average Monthly High / Low (°F)
MonthSeattle, WASunnyvale, CA
January48° / 37°58° / 42°
February51° / 37°62° / 45°
March54° / 40°66° / 47°
April59° / 43°69° / 49°
May65° / 48°74° / 53°
June70° / 53°78° / 56°
July76° / 57°80° / 58°
August76° / 57°80° / 59°
September71° / 53°79° / 57°
October60° / 46°74° / 53°
November52° / 40°65° / 46°
December46° / 36°58° / 42°

Hot, Freezing, Rainy, Snowy Days: Seattle / Sunnyvale
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 06 / 118 / 101 / 0
February0 / 05 / 015 / 101 / 0
March0 / 02 / 017 / 100 / 0
April0 / 10 / 015 / 60 / 0
May0 / 10 / 012 / 30 / 0
June0 / 30 / 010 / 10 / 0
July1 / 30 / 06 / 00 / 0
August0 / 30 / 05 / 00 / 0
September0 / 30 / 08 / 10 / 0
October0 / 10 / 013 / 40 / 0
November0 / 03 / 019 / 80 / 0
December0 / 07 / 118 / 111 / 0
August is the hottest month for Seattle with an average high temperature of 76.3°, which ranks it as cooler than most places in Washington. In Seattle, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Seattle are August, July and September.

August is the hottest month for Sunnyvale with an average high temperature of 80.3°, which ranks it as cooler than most places in California. In Sunnyvale, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sunnyvale are June, September and July.


December has the coldest nighttime temperatures for Seattle with an average of 35.9°. This is one of the warmest places in Washington.

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



In Seattle, there are 1.7 days annually when the high temperature is over 90°, which is cooler than most places in Washington.

In Sunnyvale, there are 13.3 days annually when the high temperature is over 90°, which is cooler than most places in California.



In Seattle, there are 24.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Washington.

In Sunnyvale, there are 2.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.



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

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



November is the wettest month in Seattle with 6.2 inches of rain, and the driest month is July with 0.8 inches. The wettest season is Spring with 39% of yearly precipitation and 9% occurs in Autumn, which is the driest season. The annual rainfall of 38.0 inches in Seattle means that it is about average compared to other places in Washington.


February is the wettest month in Sunnyvale with 3.1 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 56% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 15.4 inches in Sunnyvale means that it is drier than most places in California.


November is the rainiest month in Seattle with 18.7 days of rain, and August is the driest month with only 5.3 rainy days. There are 155.3 rainy days annually in Seattle, which is about average compared to other places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 13% chance of a rainy day.

December is the rainiest month in Sunnyvale with 10.5 days of rain, and July is the driest month with only 0.2 rainy days. There are 62.6 rainy days annually in Sunnyvale, 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.



An annual snowfall of 4.6 inches in Seattle means that it is about average compared to other places in Washington.

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



December is the snowiest month in Seattle with 2.1 inches of snow, and 4 months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Sunnyvale.


DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.


Reviews for Seattle    2 Reviews

Over 15 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

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Over 15 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

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Reviews for Sunnyvale    2 Reviews

Over 15 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply

Over 15 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Sunnyvale

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ZIPS IN SEATTLE, WASHINGTON
98115, 98103, 98133, 98105, 98118, 98125, 98122, 98117, 98144, 98109, 28 total
ZIPS IN SUNNYVALE, CALIFORNIA
94087, 94086, 94085, 94089

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