2025 Compare Climate & Weather:
Black Diamond, WA vs Chelan, WA

Highlights

On average, there are 196 sunny days per year in Chelan. Black Diamond averages 156 sunny days per year. The US average is 205 sunny days.

Chelan, Washington gets 12.4 inches of rain, on average, per year. Black Diamond, Washington gets 50 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Chelan averages 33.8 inches of snow per year. Black Diamond averages 4.7 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Chelan, Washington
Summer High: the July high is around 86.3 degrees
Winter Low: the January low is 22.3
Rain: averages 12.4 inches of rain a year
Snow: averages 33.8 inches of snow a year

Black Diamond, Washington
Summer High: the July high is around 75.7 degrees
Winter Low: the January low is 34.7
Rain: averages 50 inches of rain a year
Snow: averages 4.7 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Chelan is 7.1 (10=best), which means it is about average compared to other places in Washington.

The annual BestPlaces Comfort Index for Black Diamond is 7.0 (10=best), which means it is less comfortable than most places in Washington.

Today's Weather - Black Diamond, WA

48°F

Today's Weather - Chelan, WA

55°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Black Diamond / Chelan

August is the hottest month for Black Diamond with an average high temperature of 76.4°, which ranks it as cooler than most places in Washington. In Black Diamond, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Black Diamond are August, July and September.

August is the hottest month for Chelan with an average high temperature of 86.6°, which ranks it as warmer than most places in Washington. In Chelan, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chelan are June, September and May.

December has the coldest nighttime temperatures for Black Diamond with an average of 33.2°. This is about average compared to other places in Washington.

December has the coldest nighttime temperatures for Chelan with an average of 21.8°. This is colder than most places in Washington.

In Black Diamond, there are 3.3 days annually when the high temperature is over 90°, which is about average compared to other places in Washington.

In Chelan, there are 27.3 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Black Diamond, there are 49.9 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Washington.

In Chelan, there are 122.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

In Black Diamond, 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 Chelan, there are 2.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.

November is the wettest month in Black Diamond with 7.9 inches of rain, and the driest month is July with 1.3 inches. The wettest season is Spring with 34% of yearly precipitation and 11% occurs in Autumn, which is the driest season. The annual rainfall of 50.0 inches in Black Diamond means that it is wetter than most places in Washington.


December is the wettest month in Chelan with 1.9 inches of rain, and the driest month is August with 0.3 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 12.4 inches in Chelan means that it is drier than most places in Washington.

November is the rainiest month in Black Diamond with 20.3 days of rain, and August is the driest month with only 5.8 rainy days. There are 173.6 rainy days annually in Black Diamond, which is rainier than most places in Washington. The rainiest season is Spring when it rains 31% of the time and the driest is Autumn with only a 14% chance of a rainy day.

December is the rainiest month in Chelan with 9.1 days of rain, and August is the driest month with only 2.2 rainy days. There are 69.4 rainy days annually in Chelan, which is one of the least rainy places in Washington. The rainiest season is Spring when it rains 36% of the time and the driest is Autumn with only a 15% chance of a rainy day.

An annual snowfall of 4.7 inches in Black Diamond means that it is about average compared to other places in Washington.

An annual snowfall of 33.8 inches in Chelan means that it is snowier than most places in Washington.

November is the snowiest month in Black Diamond with 1.4 inches of snow, and 4 months of the year have significant snowfall.

December is the snowiest month in Chelan with 13.7 inches of snow, and 5 months of the year have significant snowfall.