Washington, IA Climate


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United States / Iowa / Iowa City Metro Area / Washington County / Washington / Zip Codes
Washington, IA has a humid continental climate with warm summers and cold winters. Average temperatures range from 24°F to 78°F throughout the year, and the area typically sees precipitation of 36 inches per year. The hottest months are July and August, while January is usually the coldest month of the year. Snowfall in Washington generally occurs between November and April, with an average of 25 inches of snow during those months.

Washington, Iowa gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Washington averages 29 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 199 sunny days per year in Washington. The US average is 205 sunny days.

Washington gets some kind of precipitation, on average, 105 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 13
Rain: averages 37 inches of rain a year
Snow: averages 29 inches of snow a year

Bestplaces Comfort Index

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

8.5 Summer - 4.8 Winter
June, September and May are the most pleasant months in Washington, while January and December are the least comfortable months.

  ClimateWashington, IowaUnited States
  37.3 in.38.1 in.
  28.7 in.27.8 in.
  105.1 days106.2 days
  199 days205 days
  85.7°85.8°
  12.8°21.7°
  77
  3.94.3
  758 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 Washington with an average high temperature of 85.7°, which ranks it as warmer than most places in Iowa. In Washington, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Washington are September, June and May.
In Washington, there are 18.0 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.
January has the coldest nighttime temperatures for Washington with an average of 12.8°. This is warmer than most places in Iowa.
In Washington, there are 135.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.
In Washington, there are 13.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.
The humidity is usually comfortable in Washington but some summer months can be unpleasant. July is the most humid month, though humidity is low for most of the year. The most humid months in Washington are July, August and June.
May is the wettest month in Washington with 4.7 inches of rain, and the driest month is January with 1.3 inches. The wettest season is Autumn with 36% of yearly precipitation and 12% occurs in Spring, which is the driest season. The annual rainfall of 37.3 inches in Washington means that it is wetter than most places in Iowa.
May is the rainiest month in Washington with 11.4 days of rain, and February is the driest month with only 6.9 rainy days. There are 105.1 rainy days annually in Washington, which is rainier than most places in Iowa. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 21% chance of a rainy day.
An annual snowfall of 28.7 inches in Washington means that it is less snowy than most places in Iowa. February is the snowiest month in Washington with 7.7 inches of snow, and 6 months of the year have significant snowfall.
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