2025 Compare Climate & Weather:
Hayden, ID vs Kennewick, WA

Highlights

On average, there are 191 sunny days per year in Kennewick. Hayden averages 172 sunny days per year. The US average is 205 sunny days.

Kennewick, Washington gets 8.1 inches of rain, on average, per year. Hayden, Idaho gets 25.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Kennewick averages 3.5 inches of snow per year. Hayden averages 42.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Kennewick, Washington
Summer High: the July high is around 89.9 degrees
Winter Low: the January low is 28.7
Rain: averages 8.1 inches of rain a year
Snow: averages 3.5 inches of snow a year

Hayden, Idaho
Summer High: the July high is around 81.5 degrees
Winter Low: the January low is 23.5
Rain: averages 25.6 inches of rain a year
Snow: averages 42.5 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Hayden is 6.7 (10=best), which means it is more comfortable than most places in Idaho.

Today's Weather - Hayden, ID

67°F

Today's Weather - Kennewick, WA

68°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Hayden / Kennewick

August is the hottest month for Hayden with an average high temperature of 81.6°, which ranks it as cooler than most places in Idaho. In Hayden, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hayden are July, August and June.

July is the hottest month for Kennewick with an average high temperature of 89.9°, which ranks it as one of the hottest places in Washington. In Kennewick, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Kennewick are September, May and June.

December has the coldest nighttime temperatures for Hayden with an average of 22.9°. This is warmer than most places in Idaho.

December has the coldest nighttime temperatures for Kennewick with an average of 27.5°. This is colder than most places in Washington.

In Hayden, there are 11.8 days annually when the high temperature is over 90°, which is cooler than most places in Idaho.

In Kennewick, there are 39.9 days annually when the high temperature is over 90°, which is one of the hottest places in Washington.

In Hayden, there are 139.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Idaho.

In Kennewick, there are 87.1 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

In Hayden, there are 2.4 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Idaho.

In Kennewick, there are 0.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.

November is the wettest month in Hayden with 3.6 inches of rain, and the driest month is August with 0.9 inches. The wettest season is Spring with 33% of yearly precipitation and 15% occurs in Autumn, which is the driest season. The annual rainfall of 25.6 inches in Hayden means that it is wetter than most places in Idaho.


December is the wettest month in Kennewick with 1.2 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Spring with 39% of yearly precipitation and 13% occurs in Autumn, which is the driest season. The annual rainfall of 8.1 inches in Kennewick means that it is one of the driest places in Washington.

November is the rainiest month in Hayden with 14.3 days of rain, and August is the driest month with only 4.4 rainy days. There are 116.6 rainy days annually in Hayden, which is rainier than most places in Idaho. The rainiest season is Spring when it rains 30% of the time and the driest is Autumn with only a 16% chance of a rainy day.

January is the rainiest month in Kennewick with 11.5 days of rain, and August is the driest month with only 2.3 rainy days. There are 82.8 rainy days annually in Kennewick, which is less rainy than most places in Washington. The rainiest season is Spring when it rains 38% of the time and the driest is Autumn with only a 12% chance of a rainy day.

An annual snowfall of 42.5 inches in Hayden means that it is about average compared to other places in Idaho.

An annual snowfall of 3.5 inches in Kennewick means that it is less snowy than most places in Washington.

December is the snowiest month in Hayden with 15.9 inches of snow, and 5 months of the year have significant snowfall.

December is the snowiest month in Kennewick with 1.4 inches of snow, and 3 months of the year have significant snowfall.