2025 Compare Climate & Weather:
Sierra Vista, AZ vs Kennewick, WA

Highlights

On average, there are 191 sunny days per year in Kennewick. Sierra Vista averages 284 sunny days per year. The US average is 205 sunny days.

Kennewick, Washington gets 8.1 inches of rain, on average, per year. Sierra Vista, Arizona gets 15.2 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. Sierra Vista averages 1.2 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

Sierra Vista, Arizona
Summer High: the July high is around 91.5 degrees
Winter Low: the January low is 34.2
Rain: averages 15.2 inches of rain a year
Snow: averages 1.2 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 Sierra Vista is 8.4 (10=best), which means it is one of the most pleasant places in Arizona.

Today's Weather - Sierra Vista, AZ

54°F

Today's Weather - Kennewick, WA

62°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Sierra Vista / Kennewick

June is the hottest month for Sierra Vista with an average high temperature of 93.0°, which ranks it as cooler than most places in Arizona. In Sierra Vista, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sierra Vista are October, April and May.

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.

January has the coldest nighttime temperatures for Sierra Vista with an average of 34.2°. This is about average compared to other places in Arizona.

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

In Sierra Vista, there are 72.1 days annually when the high temperature is over 90°, which is cooler than most places in Arizona.

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 Sierra Vista, there are 35.1 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Arizona.

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

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

August is the wettest month in Sierra Vista with 3.7 inches of rain, and the driest month is May with 0.3 inches. The wettest season is Autumn with 50% of yearly precipitation and 9% occurs in Summer, which is the driest season. The annual rainfall of 15.2 inches in Sierra Vista means that it is wetter than most places in Arizona.


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.

August is the rainiest month in Sierra Vista with 11.6 days of rain, and May is the driest month with only 1.5 rainy days. There are 53.2 rainy days annually in Sierra Vista, which is rainier than most places in Arizona. The rainiest season is Autumn when it rains 47% of the time and the driest is Summer with only a 11% 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 1.2 inches in Sierra Vista means that it is about average compared to other places in Arizona.

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

January is the snowiest month in Sierra Vista with 0.5 inches of snow, and 1 month 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.