Dayton, WA Climate


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United States / Washington / Walla Walla Metro Area / Columbia County / Dayton / Zip Codes
Dayton, WA has a warm climate throughout the year with mild winters and hot summers. The average high temperature in summer is around 84°F, and the average low temperature in winter is around 32°F. Rainfall is fairly consistent throughout the year, with an average annual precipitation of about 17 inches, making it a great place to enjoy outdoor activities all year round.

Dayton, Washington gets 16 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Dayton averages 15 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 176 sunny days per year in Dayton. The US average is 205 sunny days.

Dayton gets some kind of precipitation, on average, 107 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 86 degrees
Winter Low: the January low is 26
Rain: averages 16 inches of rain a year
Snow: averages 15 inches of snow a year

Bestplaces Comfort Index

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

9 Summer - 4.9 Winter
June, September and August are the most pleasant months in Dayton, while December and January are the least comfortable months.

  ClimateDayton, WashingtonUnited States
  16.4 in.38.1 in.
  14.6 in.27.8 in.
  106.9 days106.2 days
  176 days205 days
  86.4°85.8°
  26.3°21.7°
  7.17
  3.14.3
  1660 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 Dayton with an average high temperature of 86.4°, which ranks it as warmer than most places in Washington. In Dayton, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Dayton are September, June and August.
In Dayton, there are 28.1 days annually when the high temperature is over 90°, which is hotter than most places in Washington.
December has the coldest nighttime temperatures for Dayton with an average of 24.8°. This is colder than most places in Washington.
In Dayton, there are 113.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.
In Dayton, 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 Dayton, 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 Dayton with 2.2 inches of rain, and the driest month is July with 0.5 inches. The wettest season is Spring with 33% of yearly precipitation and 13% occurs in Autumn, which is the driest season. The annual rainfall of 16.4 inches in Dayton means that it is drier than most places in Washington.
November is the rainiest month in Dayton with 14.1 days of rain, and August is the driest month with only 3.4 rainy days. There are 106.9 rainy days annually in Dayton, which is less rainy 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 13% chance of a rainy day.
An annual snowfall of 14.6 inches in Dayton means that it is snowier than most places in Washington. December is the snowiest month in Dayton with 5.1 inches of snow, and 5 months of the year have significant snowfall.
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