Harristown, Illinois Climate

United States

Pop. 1,332 Elev. 213 m / 699 ft TZ: America/Chicago (UTC-5) ·

Harristown is largely arid, with warm summers peaking at 87°F (31°C) in July and cold winters around 17°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 101°F (38°C), while wind chill can drive winter lows to 9°F (-13°C). Precipitation occurs on roughly 46 days per year (30.4 in / 772 mm total), with snow on 7 days and 31 in (779 mm) of annual accumulation. The city averages 128 sunny days per year and around 28 thunderstorm days.

Temperature 87°F (30°C) high 17°F (-8°C) low
Feels like 101°F (38°C) high 9°F (-13°C) low
Rain 46 days 30.4 in (772 mm) /yr
Snow 7 days 30.6 in (779 mm) /yr
Sky 128 sunny 28 stormy
Wind 2.7 mph (1.2 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Mar, Aug, Sep, Oct

Sky & Air by Month

Cloud cover (%)
50
Jan
59
Feb
53
Mar
68
Apr
60
May
58
Jun
63
Jul
46
Aug
33
Sep
44
Oct
50
Nov
68
Dec
Humidity (%)
69
Jan
65
Feb
56
Mar
62
Apr
64
May
72
Jun
79
Jul
71
Aug
60
Sep
62
Oct
67
Nov
78
Dec

Weather Days by Month

↓ Weather days table

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Nearby Cities

Nearby

Commercial airport 12 mi Decatur Airport (DEC)
Ski resort 124 mi Hidden Valley
National park 109 mi Shakamak State Park
Hospital 7 mi Decatur Memorial Hospital
Hiking trail 4 mi River Trail

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Monthly Weather Data

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Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 32°F 0°C 17°F -8°C 0.5 in 12 mm 8.9 in226 mm 14
February 40°F 5°C 24°F -4°C 0.4 in 11 mm 5.9 in149 mm 8
March 62°F 17°C 40°F 4°C 2.8 in 72 mm 1.1 in27 mm 13
April 67°F 20°C 47°F 8°C 5.1 in 129 mm 4
May 74°F 23°C 54°F 12°C 3.7 in 95 mm 10
June 84°F 29°C 67°F 20°C 5.4 in 137 mm 9
July 87°F 30°C 72°F 22°C 5.1 in 130 mm 4
August 83°F 28°C 64°F 18°C 0.9 in 23 mm 15
September 83°F 28°C 57°F 14°C 1.8 in 46 mm 18
October 71°F 22°C 50°F 10°C 2.0 in 51 mm 16
November 54°F 12°C 37°F 3°C 1.7 in 42 mm 7.2 in184 mm 11
December 40°F 4°C 24°F -5°C 1.0 in 25 mm 7.6 in193 mm 6

Weather Days by Month

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Month Sunny Days Storm Days
January 14 0
February 8 0
March 13 3
April 4 6
May 10 3
June 9 6
July 4 6
August 15 0
September 18 2
October 16 1
November 11 1
December 6 0