Coulee Dam, WA Climate


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United States / Washington / Wenatchee Metro Area / Okanogan County / Coulee Dam / Zip Codes
Coulee Dam, WA has a temperate climate which is characterized by mild, wet winters and warm, dry summers. The average temperature in the summer months ranges from highs of around 78°F during the day to lows of around 54°F at night. During the winter months, temperatures typically hover between 35°F and 47°F during the day and drop to an average low of 24°F during the overnight hours. Rainfall is abundant throughout the year with an annual average of 25 inches and snowfall averages 1-2 inches per year.

Coulee Dam, Washington gets 12 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Coulee Dam averages 32 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 185 sunny days per year in Coulee Dam. The US average is 205 sunny days.

Coulee Dam gets some kind of precipitation, on average, 87 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 88 degrees
Winter Low: the January low is 22
Rain: averages 12 inches of rain a year
Snow: averages 32 inches of snow a year

Bestplaces Comfort Index

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

8.9 Summer - 4.4 Winter
September, June and August are the most pleasant months in Coulee Dam, while December and January are the least comfortable months.

  ClimateCoulee Dam, WashingtonUnited States
    Unlock38.1 in.
  31.6 in.  Unlock
    Unlock106.2 days
  185 days  Unlock
  88.2°85.8°
    Unlock21.7°
  7.1  Unlock
    Unlock4.3
  1148 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.

July is the hottest month for Coulee Dam with an average high temperature of 88.2°, which ranks it as one of the hottest places in Washington. In Coulee Dam, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Coulee Dam are September, June and May.
In Coulee Dam, there are 33.1 days annually when the high temperature is over 90°, which is one of the hottest places in Washington.
December has the coldest nighttime temperatures for Coulee Dam with an average of 21.9°. This is colder than most places in Washington.
In Coulee Dam, there are 125.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.
In Coulee Dam, there are 1.9 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.
Humidity is low in Coulee Dam, 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.
December is the wettest month in Coulee Dam with 1.7 inches of rain, and the driest month is August with 0.3 inches. The wettest season is Spring with 35% of yearly precipitation and 18% occurs in Autumn, which is the driest season. The annual rainfall of 11.7 inches in Coulee Dam means that it is drier than most places in Washington.
December is the rainiest month in Coulee Dam with 11.7 days of rain, and August is the driest month with only 2.8 rainy days. There are 86.8 rainy days annually in Coulee Dam, which is less rainy than most places in Washington. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only a 15% chance of a rainy day.
An annual snowfall of 31.6 inches in Coulee Dam means that it is snowier than most places in Washington. December is the snowiest month in Coulee Dam with 13.0 inches of snow, and 5 months of the year have significant snowfall.
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