Mattawa, WA Climate


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United States / Washington / Moses Lake Metro Area / Grant County / Mattawa / Zip Codes
Mattawa, WA experiences a semi-arid climate with warm, dry summers and mild winters. The average high temperature in the summer months is around 90 degrees Fahrenheit, while the average low temperature during the winter months is near 30 degrees Fahrenheit. Precipitation is fairly minimal throughout the year, but the area does receive more snowfall than most of Washington State. The region has numerous sunny days and plenty of sunshine to enjoy throughout the year.

Mattawa, Washington gets 8 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Mattawa averages 9 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 188 sunny days per year in Mattawa. The US average is 205 sunny days.

Mattawa gets some kind of precipitation, on average, 59 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 91 degrees
Winter Low: the January low is 27
Rain: averages 8 inches of rain a year
Snow: averages 9 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Mattawa is 7.6 (10=best), which means it is one of the most pleasant places in Washington.

8.7 Summer - 5.5 Winter
June, September and May are the most pleasant months in Mattawa, while December and January are the least comfortable months.

  ClimateMattawa, WashingtonUnited States
  7.5 in.38.1 in.
  9.1 in.27.8 in.
  59.1 days106.2 days
  188 days205 days
  91.1°85.8°
  27.1°21.7°
  7.67
  3.24.3
  768 ft.2443 ft.
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 Mattawa with an average high temperature of 91.1°, which ranks it as one of the hottest places in Washington. In Mattawa, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mattawa are May, September and June.
In Mattawa, there are 45.7 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 Mattawa with an average of 25.3°. This is colder than most places in Washington.
In Mattawa, there are 97.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.
In Mattawa, there are 1.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.
Humidity is low in Mattawa, 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 Mattawa with 1.3 inches of rain, and the driest month is July with 0.2 inches. The wettest season is Spring with 39% of yearly precipitation and 12% occurs in Autumn, which is the driest season. The annual rainfall of 7.5 inches in Mattawa means that it is one of the driest places in Washington.
December is the rainiest month in Mattawa with 8.1 days of rain, and July is the driest month with only 1.7 rainy days. There are 59.1 rainy days annually in Mattawa, which is one of the least rainy places in Washington. The rainiest season is Spring when it rains 37% of the time and the driest is Autumn with only a 12% chance of a rainy day.
An annual snowfall of 9.1 inches in Mattawa means that it is snowier than most places in Washington. December is the snowiest month in Mattawa with 4.8 inches of snow, and 4 months of the year have significant snowfall.
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