Harristown, IL Weather - Forecast & Monthly Averages

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Weather Quick Facts

The highest monthly average temperature in Harristown for August is 78.1 degrees
The lowest monthly average temperature in Harristown for February is 29.4 degrees
The most monthly precipitation in Harristown occurs in June with 8.1 inches
The air quality index in Harristown is 5% worse than the national average
The pollution index in Harristown is 74% better than the national average

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Harristown 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	24°F	38°F	31°F	6.8"
February	23°F	37°F	29°F	3.4"
March	35°F	56°F	45°F	3.0"
April	43°F	65°F	54°F	4.2"
May	54°F	78°F	66°F	3.1"
June	64°F	86°F	75°F	8.1"
July	65°F	86°F	76°F	4.0"
August	68°F	89°F	78°F	3.9"
September	59°F	85°F	72°F	7.7"
October	49°F	71°F	60°F	7.1"
November	37°F	56°F	45°F	6.1"
December	24°F	37°F	30°F	2.5"

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Harristown 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	Harristown	Illinois	National
Air quality index	44	41	42
Pollution index	703,218	3,148,694	2,726,193

Harristown air quality information

Measurement	Total
Days measured	365
Days with good air quality	255
Days with moderate air quality	110
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Harristown air quality information

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

Average monthly Harristown temperature with heat index

Harristown monthly precipitation with daily maximum

Harristown monthly snow depth with daily maximum

Harristown monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Macon, IL	1,091	44	12.0%
Illiopolis, IL	767	44	12.0%
Argenta, IL	1,051	44	12.0%
Warrensburg, IL	1,261	44	12.0%
Blue Mound, IL	1,135	44	12.0%
Harristown, IL	1,294	44	12.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Canton Valley, CT	1,294	41	18.0%
Glenns Ferry, ID	1,294	20	60.0%
Bonneau Beach, SC	1,294	38	24.0%
Coldwell, MB	1,294	n/a
Brookdale, CA	1,293	35	30.0%
Harristown, IL	1,294	44	12.0%

Source: The Harristown, 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.