Washington, IL Weather - Forecast & Monthly Averages

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TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.

Weather Quick Facts

The highest monthly average temperature in Washington for July is 76.3 degrees
The lowest monthly average temperature in Washington for January is 25.9 degrees
The most monthly precipitation in Washington occurs in June with 5.4 inches
The air quality index in Washington is 3% better than the national average
The pollution index in Washington is 75% better than the national average

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Washington Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	17°F	37°F	26°F	2.3"
February	18°F	39°F	28°F	2.1"
March	31°F	54°F	42°F	3.1"
April	41°F	67°F	54°F	4.7"
May	51°F	77°F	64°F	4.4"
June	62°F	85°F	73°F	5.4"
July	65°F	88°F	76°F	3.4"
August	64°F	86°F	74°F	3.5"
September	56°F	81°F	68°F	4.1"
October	44°F	68°F	55°F	3.4"
November	33°F	55°F	43°F	2.9"
December	22°F	39°F	30°F	2.7"

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Washington air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
Index	Washington	Illinois	National
Air quality index	41	41	42
Pollution index	672,031	3,148,694	2,726,193

Washington air quality

Measurement	Total
Days measured	365
Days with good air quality	285
Days with moderate air quality	78
Days w/ poor A.Q. for sensitive groups	2
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.001%
Benzene	0.030%
Carbon Tetrachloride	0.000%
Lead	0.001%
Mercury	0.020%

Average monthly Washington temperature with heat index

Washington monthly precipitation with daily maximum

Washington monthly snow depth with daily maximum

Washington monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Metamora, IL	3,970	41	18.0%
Spring Bay, IL	490	41	18.0%
East Peoria, IL	23,130	41	18.0%
Mackinaw, IL	2,019	41	18.0%
Pekin, IL	33,468	41	18.0%
Washington, IL	16,894	41	18.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Heber, UT	16,894	46	8.0%
Storrs, CT	16,897	33	34.0%
Hillcrest Heights, MD	16,890	47	6.0%
Mercedes, TX	16,898	42	16.0%
Menomonie, WI	16,888	34	32.0%
Washington, IL	16,894	41	18.0%

Source: The Washington, IL weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.