Washington, IL Weather - Forecast & Monthly Averages

TEMPERATURE	25
HUMIDITY	60
PRESSURE	103050
WIND COND.	100 7.6

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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.
South Pekin, IL	1,061	41	18.0%
Chillicothe, IL	6,326	41	18.0%
Peoria Heights, IL	5,825	41	18.0%
Eureka, IL	5,485	41	18.0%
Marquette Heights, IL	2,742	41	18.0%
Washington, IL	16,555	41	18.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
South Venice, FL	16,555	38	24.0%
Abington, MA	16,557	43	14.0%
Gainesville, TX	16,557	43	14.0%
Mercedes, TX	16,561	42	16.0%
Country Club Hills, IL	16,564	55	10.0%
Washington, IL	16,555	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.