Chelan County, WA Climate

The climate in Chelan, WA County is very mild. Summers are warm and dry, with average temperatures ranging from the mid-60s to the high-90s. Winters are cool and wet, with average temperatures ranging from the low-30s to the mid-40s. Rainfall averages around 18 inches a year while snowfall averages 4 inches a year. The area has a semi-arid climate that is perfect for growing grapes and other agricultural products.

Chelan County, Washington gets 24 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Chelan County averages 100 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 199 sunny days per year in Chelan County. The US average is 205 sunny days.

Chelan County gets some kind of precipitation, on average, 93 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 83 degrees
Winter Low: the January low is 22
Rain: averages 24 inches of rain a year
Snow: averages 100 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Chelan County is 6.7 (10=best), which means it is less comfortable than most places in Washington.

9.1 Summer - 3.6 Winter

August, July and June are the most pleasant months in Chelan County, while December and January are the least comfortable months.

Climate	Chelan, Washington	United States
	Unlock	38.1 in.
	100.0 in.	Unlock
	Unlock	106.2 days
	199 days	Unlock
	82.9°	85.8°
	Unlock	21.7°
	6.7	Unlock
	Unlock	4.3
	3960 ft.	Unlock

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

August is the hottest month for Chelan County with an average high temperature of 82.9°, which ranks it as warmer than most places in Washington. In Chelan County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chelan County are June, September and July.

In Chelan County, there are 20.5 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

December has the coldest nighttime temperatures for Chelan County with an average of 20.6°. This is one of the coldest places in Washington.

In Chelan County, there are 144.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

In Chelan County, there are 2.8 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Washington.

Humidity is low in Chelan County, and some people might find the dryness to be uncomfortable. Days with noticeable humidity are rare throughout the year. A very dry climate can lead to cracked, itchy skin and dry eyes.

November is the wettest month in Chelan County with 4.1 inches of rain, and the driest month is July with 0.5 inches. The wettest season is Spring with 42% of yearly precipitation and 9% occurs in Autumn, which is the driest season. The annual rainfall of 23.7 inches in Chelan County means that it is drier than most places in Washington.

December is the rainiest month in Chelan County with 12.4 days of rain, and August is the driest month with only 3.1 rainy days. There are 93.3 rainy days annually in Chelan County, which is less rainy than most places in Washington. The rainiest season is Spring when it rains 36% of the time and the driest is Autumn with only a 14% chance of a rainy day.

An annual snowfall of 100.0 inches in Chelan County means that it is one of the snowiest places in Washington. December is the snowiest month in Chelan County with 33.3 inches of snow, and 7 months of the year have significant snowfall.

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