2025 Compare Climate & Weather:
Seattle, WA vs Boulder, UT

Highlights

On average, there are 254 sunny days per year in Boulder. Seattle averages 152 sunny days per year. The US average is 205 sunny days.

Boulder, Utah gets 10.7 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.

Boulder averages 36.9 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

Boulder, Utah
Summer High: the July high is around 85.7 degrees
Winter Low: the January low is 19.6
Rain: averages 10.7 inches of rain a year
Snow: averages 36.9 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

The annual BestPlaces Comfort Index for Boulder is 7.4 (10=best), which means it is one of the most pleasant places in Utah.

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

Today's Weather - Seattle, WA

51°F

Today's Weather - Boulder, UT

52°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Seattle / Boulder

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.

July is the hottest month for Boulder with an average high temperature of 85.7°, which ranks it as cooler than most places in Utah. In Boulder, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Boulder are June, September and August.

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

January has the coldest nighttime temperatures for Boulder with an average of 19.6°. This is warmer than most places in Utah.

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

In Boulder, there are 15.3 days annually when the high temperature is over 90°, which is cooler than most places in Utah.

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 Boulder, there are 138.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Utah.

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 Boulder, there are 0.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Utah.

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.


August is the wettest month in Boulder with 1.7 inches of rain, and the driest month is April with 0.5 inches. The wettest season is Autumn with 30% of yearly precipitation and 19% occurs in Summer, which is the driest season. The annual rainfall of 10.7 inches in Boulder means that it is drier than most places in Utah.

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.

August is the rainiest month in Boulder with 9.5 days of rain, and November is the driest month with only 3.3 rainy days. There are 62.6 rainy days annually in Boulder, which is less rainy than most places in Utah. The rainiest season is Autumn when it rains 32% of the time and the driest is Summer with only a 22% 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.

An annual snowfall of 36.9 inches in Boulder means that it is less snowy than most places in Utah.

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

January is the snowiest month in Boulder with 12.6 inches of snow, and 6 months of the year have significant snowfall.