Forsyth, Illinois Climate

United States

Pop. 3,584 Elev. 212 m / 696 ft TZ: America/Chicago (UTC-5) ·

Dry and warm, Forsyth sees July highs of 87°F (31°C) and cold January lows of 17°F (-8°C). Humidity pushes the summer feels-like temperature to 101°F (38°C), while wind chill can drive winter lows to 9°F (-13°C). Expect around 48 rainy days annually (30.3 in / 769 mm total), with snow on 6 days and 31 in (777 mm) of annual accumulation. The city averages 126 sunny days per year and around 35 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 48 days 30.3 in (769 mm) /yr
Snow 6 days 30.6 in (777 mm) /yr
Sky 126 sunny 35 stormy
Wind 2.8 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 (%)
51
Jan
59
Feb
54
Mar
67
Apr
60
May
58
Jun
64
Jul
47
Aug
33
Sep
44
Oct
50
Nov
69
Dec
Humidity (%)
68
Jan
65
Feb
55
Mar
61
Apr
62
May
72
Jun
78
Jul
71
Aug
58
Sep
60
Oct
66
Nov
79
Dec

Weather Days by Month

↓ Weather days table

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Nearby Cities

Nearby

Commercial airport 8 mi Decatur Airport (DEC)
Ski resort 136 mi
National park 105 mi Shakamak State Park
Mountain peak (5,125 ft) 417 mi Little Haw Knob
Hospital 5 mi Decatur Memorial Hospital
Hiking trail 8 mi River Trail

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 32°F 0°C 17°F -8°C 0.4 in 9 mm 8.1 in205 mm 14
February 40°F 4°C 24°F -5°C 0.4 in 10 mm 5.8 in147 mm 10
March 62°F 17°C 39°F 4°C 3.0 in 76 mm 1.4 in35 mm 11
April 67°F 19°C 46°F 8°C 5.1 in 129 mm 4
May 74°F 23°C 54°F 12°C 3.6 in 91 mm 10
June 84°F 29°C 67°F 19°C 5.1 in 131 mm 9
July 87°F 30°C 71°F 22°C 5.3 in 135 mm 3
August 83°F 28°C 64°F 18°C 1.1 in 28 mm 16
September 83°F 28°C 58°F 14°C 1.1 in 28 mm 18
October 71°F 22°C 50°F 10°C 2.7 in 69 mm 14
November 54°F 12°C 37°F 3°C 1.5 in 39 mm 7.5 in192 mm 11
December 39°F 4°C 23°F -5°C 1.0 in 26 mm 7.8 in198 mm 6

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 14 0
February 10 0
March 11 4
April 4 6
May 10 3
June 9 5
July 3 10
August 16 2
September 18 0
October 14 2
November 11 2
December 6 1