Jefferson County, Washington 

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United States / Washington / No Metro Area / Jefferson County / Cities / Zip Codes

Climate in Jefferson County, Washington

Jefferson County, Washington gets 27 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Jefferson County averages 2 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 159 sunny days per year in Jefferson County. The US average is 205 sunny days.

Jefferson County gets some kind of precipitation, on average, 143 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 73 degrees
Winter Low: the January low is 35
Rain: averages 27 inches of rain a year
Snow: averages 2 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for Jefferson County is 7.3 (10=best), which means it is more comfortable than most places in Washington.

7.3 / 10
August, July and September are the most pleasant months in Jefferson County, while December and January are the least comfortable months.

Climate Averages
  Jefferson, WashingtonUnited States
  27.1 in.38.1 in.
  2.2 in.27.8 in.
  142.5 days106.2 days
  159 days205 days
  73.3°85.8°
  35.1°21.7°
  7.37
  2.64.3
  2144 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.


August is the hottest month for Jefferson County with an average high temperature of 74.0°, which ranks it as cooler than most places in Washington. In Jefferson County, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jefferson County are August, July and September.


December has the coldest nighttime temperatures for Jefferson County with an average of 34.2°. This is warmer than most places in Washington.


In Jefferson County, there are 1.7 days annually when the high temperature is over 90°, which is cooler than most places in Washington.


In Jefferson County, there are 45.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.


In Jefferson 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.


November is the wettest month in Jefferson County with 4.2 inches of rain, and the driest month is July with 0.8 inches. The wettest season is Spring with 37% of yearly precipitation and 11% occurs in Autumn, which is the driest season. The annual rainfall of 27.1 inches in Jefferson County means that it is drier than most places in Washington.


November is the rainiest month in Jefferson County with 17.1 days of rain, and August is the driest month with only 5.3 rainy days. There are 142.5 rainy days annually in Jefferson County, which is less rainy than most places in Washington. The rainiest season is Spring when it rains 32% of the time and the driest is Autumn with only a 15% chance of a rainy day.


An annual snowfall of 2.2 inches in Jefferson County means that it is less snowy than most places in Washington. December is the snowiest month in Jefferson County with 0.7 inches of snow, and 2 months of the year have significant snowfall.





CLIMATE MAP
  • Annual Rainfall (US Avg: 36.5")
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    MAPS OF JEFFERSON COUNTY, WASHINGTON
    ZIP CODES IN JEFFERSON COUNTY, WASHINGTON
    98368 98365 98339 98376 98325 98320 98358

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