2025 Compare Climate & Weather:
Nampa, ID vs Chester, CA

Highlights

On average, there are 243 sunny days per year in Chester. Nampa averages 207 sunny days per year. The US average is 205 sunny days.

Chester, California gets 40.7 inches of rain, on average, per year. Nampa, Idaho gets 10.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Chester averages 121.4 inches of snow per year. Nampa averages 9.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Chester, California
Summer High: the July high is around 83.9 degrees
Winter Low: the January low is 22.3
Rain: averages 40.7 inches of rain a year
Snow: averages 121.4 inches of snow a year

Nampa, Idaho
Summer High: the July high is around 91.3 degrees
Winter Low: the January low is 23.6
Rain: averages 10.7 inches of rain a year
Snow: averages 9.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Chester is 6.7 (10=best), which means it is one of the least comfortable places in California.

The annual BestPlaces Comfort Index for Nampa is 7.3 (10=best), which means it is one of the most pleasant places in Idaho.

Today's Weather - Nampa, ID

55°F

Today's Weather - Chester, CA

56°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Nampa / Chester

July is the hottest month for Nampa with an average high temperature of 91.3°, which ranks it as warmer than most places in Idaho. In Nampa, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Nampa are September, May and June.

July is the hottest month for Chester with an average high temperature of 83.9°, which ranks it as cooler than most places in California. In Chester, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chester are September, June and August.

December has the coldest nighttime temperatures for Nampa with an average of 22.7°. This is warmer than most places in Idaho.

January has the coldest nighttime temperatures for Chester with an average of 22.3°. This is one of the coldest places in California.

In Nampa, there are 47.8 days annually when the high temperature is over 90°, which is hotter than most places in Idaho.

In Chester, there are 11.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Nampa, there are 116.6 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Idaho.

In Chester, there are 176.7 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in California.

In Nampa, there are 2.8 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Idaho.

In Chester, there are 0.8 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in California.

December is the wettest month in Nampa with 1.5 inches of rain, and the driest month is July with 0.3 inches. The wettest season is Spring with 33% of yearly precipitation and 12% occurs in Autumn, which is the driest season. The annual rainfall of 10.7 inches in Nampa means that it is drier than most places in Idaho.


December is the wettest month in Chester with 7.3 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Spring with 50% of yearly precipitation and 3% occurs in Autumn, which is the driest season. The annual rainfall of 40.7 inches in Chester means that it is wetter than most places in California.

December is the rainiest month in Nampa with 10.4 days of rain, and July is the driest month with only 2.3 rainy days. There are 80.1 rainy days annually in Nampa, which is less rainy than most places in Idaho. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only a 12% chance of a rainy day.

December is the rainiest month in Chester with 11.5 days of rain, and July is the driest month with only 1.0 rainy days. There are 83.2 rainy days annually in Chester, which is one of the rainiest places in California. The rainiest season is Spring when it rains 40% of the time and the driest is Autumn with only a 7% chance of a rainy day.

An annual snowfall of 9.2 inches in Nampa means that it is one of the least snowy places in Idaho.

An annual snowfall of 121.4 inches in Chester means that it is one of the snowiest places in California.

December is the snowiest month in Nampa with 4.0 inches of snow, and 4 months of the year have significant snowfall.

January is the snowiest month in Chester with 31.1 inches of snow, and 8 months of the year have significant snowfall.