2025 Compare Climate & Weather:
Surprise, AZ vs Richland, WA

Highlights

On average, there are 196 sunny days per year in Richland. Surprise averages 301 sunny days per year. The US average is 205 sunny days.

Richland, Washington gets 8.1 inches of rain, on average, per year. Surprise, Arizona gets 9.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Richland averages 3.6 inches of snow per year. Surprise averages 0.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Richland, 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 3.6 inches of snow a year

Surprise, Arizona
Summer High: the July high is around 105.5 degrees
Winter Low: the January low is 42.2
Rain: averages 9.2 inches of rain a year
Snow: averages 0.1 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Surprise is 7.3 (10=best), which means it is less comfortable than most places in Arizona.

Today's Weather - Surprise, AZ

69°F

Today's Weather - Richland, WA

46°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Surprise / Richland

July is the hottest month for Surprise with an average high temperature of 105.5°, which ranks it as warmer than most places in Arizona. In Surprise, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Surprise are March, November and April.

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

December has the coldest nighttime temperatures for Surprise with an average of 41.1°. This is warmer than most places in Arizona.

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

In Surprise, there are 165.1 days annually when the high temperature is over 90°, which is hotter than most places in Arizona.

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

In Surprise, there are 4.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Arizona.

In Richland, there are 86.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

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

February is the wettest month in Surprise with 1.3 inches of rain, and the driest month is May with 0.1 inches. The wettest season is Spring with 37% of yearly precipitation and 15% occurs in Summer, which is the driest season. The annual rainfall of 9.2 inches in Surprise means that it is drier than most places in Arizona.


December is the wettest month in Richland with 1.2 inches of rain, and the driest month is August with 0.2 inches. The wettest season is Spring with 38% of yearly precipitation and 14% occurs in Autumn, which is the driest season. The annual rainfall of 8.1 inches in Richland means that it is one of the driest places in Washington.

February is the rainiest month in Surprise with 3.9 days of rain, and June is the driest month with only 0.4 rainy days. There are 32.0 rainy days annually in Surprise, which is less rainy than most places in Arizona. The rainiest season is Spring when it rains 36% of the time and the driest is Summer with only a 19% chance of a rainy day.

January is the rainiest month in Richland 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 Richland, 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 0.1 inches in Surprise means that it is less snowy than most places in Arizona.

An annual snowfall of 3.6 inches in Richland means that it is less snowy than most places in Washington.

December is the snowiest month in Surprise with 0.0 inches of snow, and no months of the year have significant snowfall.

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