Cowlitz County, WA Climate

Cowlitz, WA County has a marine west coast climate, which is characterized by mild temperatures and ample precipitation through the year. The summers are usually warm and dry with occasional heavy rains and thunderstorms while the winters are cool and wet with average snowfall of 15 inches annually. The yearly average temperature in Cowlitz is 48°F (9°C), while the average high temperature in summer months reaches 70°F (21°C) and the average low temperature in winter months drops down to 35°F (2°C). Precipitation levels remain fairly consistent throughout the year, with an average of 40-45 inches of rain per year.

Cowlitz County, Washington gets 65 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Cowlitz County averages 5 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 140 sunny days per year in Cowlitz County. The US average is 205 sunny days.

Cowlitz County gets some kind of precipitation, on average, 178 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 78 degrees
Winter Low: the January low is 33
Rain: averages 65 inches of rain a year
Snow: averages 5 inches of snow a year

Bestplaces Comfort Index

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

9.1 Summer - 5 Winter

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

Climate	Cowlitz, Washington	United States
	Unlock	38.1 in.
	5.2 in.	Unlock
	Unlock	106.2 days
	140 days	Unlock
	78.3°	85.8°
	Unlock	21.7°
	7	Unlock
	Unlock	4.3
	1320 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 Cowlitz County with an average high temperature of 79.4°, which ranks it as warmer than most places in Washington. In Cowlitz County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Cowlitz County are July, August and September.

In Cowlitz County, there are 9.2 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

December has the coldest nighttime temperatures for Cowlitz County with an average of 32.7°. This is about average compared to other places in Washington.

In Cowlitz County, there are 57.2 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Washington.

In Cowlitz County, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

Humidity in Cowlitz County is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are August, July and September.

November is the wettest month in Cowlitz County with 10.5 inches of rain, and the driest month is July with 1.0 inches. The wettest season is Spring with 40% of yearly precipitation and 8% occurs in Autumn, which is the driest season. The annual rainfall of 65.1 inches in Cowlitz County means that it is wetter than most places in Washington.

November is the rainiest month in Cowlitz County with 21.2 days of rain, and August is the driest month with only 5.2 rainy days. There are 177.7 rainy days annually in Cowlitz County, which is rainier than most places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 12% chance of a rainy day.

An annual snowfall of 5.2 inches in Cowlitz County means that it is about average compared to other places in Washington. January is the snowiest month in Cowlitz County with 1.7 inches of snow, and 3 months of the year have significant snowfall.

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Kelsonian · Kelso, WA

Cowlitz is in the middle of it all

Over 6 years ago

Cowlitz county is a great area. It has a mild climate, and extreme weather is not all that common, making it quite ideal year round. There are many towns and cities of More