Washington, Illinois 

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IL Gifts

Climate in Washington, Illinois

Washington, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Washington averages 24 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 194 sunny days per year in Washington. The US average is 205 sunny days.

Washington gets some kind of precipitation, on average, 108 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 16
Rain: averages 39 inches of rain a year
Snow: averages 24 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for Washington is 7.1 (10=best), which means it is more comfortable than most places in Illinois.

8.5 / 4.9

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

Climate Averages
  Washington, IllinoisUnited States
  38.7 in.38.1 in.
  23.5 in.27.8 in.
  108.4 days106.2 days
  194 days205 days
  86.0°85.8°
  15.6°21.7°
  7.17
  3.94.3
  761 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 86.0°, which ranks it as about average compared to other places in Illinois. 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, May and June.


In Washington, there are 20.8 days annually when the high temperature is over 90°, which is about average compared to other places in Illinois.


January has the coldest nighttime temperatures for Washington with an average of 15.6°. This is colder than most places in Illinois.


In Washington, there are 125.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.


In Washington, there are 7.4 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.


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 4.6 inches of rain, and the driest month is February with 1.7 inches. The wettest season is Autumn with 31% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 38.7 inches in Washington means that it is about average compared to other places in Illinois.


May is the rainiest month in Washington with 11.3 days of rain, and September is the driest month with only 7.0 rainy days. There are 108.4 rainy days annually in Washington, which is about average compared to other places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 23% chance of a rainy day.


An annual snowfall of 23.5 inches in Washington means that it is snowier than most places in Illinois. January is the snowiest month in Washington with 7.4 inches of snow, and 6 months of the year have significant snowfall.





  • Annual Rainfall (US Avg: 36.5")
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