Lewistown, Illinois Climate

United States

Pop. 2,261 Elev. 180 m / 591 ft TZ: America/Chicago (UTC-5) ·

Lewistown has a dry climate with warm summers reaching 89°F (32°C) in July and cold winters averaging 18°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 103°F (39°C), while wind chill can drive winter lows to 10°F (-12°C). Rain falls on about 46 days per year (27.1 in / 689 mm total), with snow on 4 days and 29 in (729 mm) of annual accumulation. The city averages 126 sunny days per year and around 30 thunderstorm days.

Temperature 89°F (32°C) high 18°F (-8°C) low
Feels like 103°F (40°C) high 10°F (-12°C) low
Rain 46 days 27.1 in (689 mm) /yr
Snow 4 days 28.7 in (729 mm) /yr
Sky 126 sunny 30 stormy
Wind 2.4 mph (1.1 m/s) avg

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Monthly Climate Chart

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

Sky & Air by Month

Cloud cover (%)
49
Jan
59
Feb
50
Mar
68
Apr
55
May
52
Jun
67
Jul
50
Aug
40
Sep
44
Oct
51
Nov
68
Dec
Humidity (%)
63
Jan
64
Feb
58
Mar
62
Apr
58
May
65
Jun
71
Jul
70
Aug
57
Sep
58
Oct
65
Nov
77
Dec

Weather Days by Month

↓ Weather days table

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Nearby Cities

Nearby

Commercial airport 31 mi General Wayne A. Downing Peoria International Airport (PIA)
Ski resort 131 mi Hidden Valley
National park 189 mi Pikes Peak State Park
Hospital 8 mi Mason District Hospital
Hiking trail 40 mi Kickapoo Creek Rec Area

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 33°F 1°C 18°F -8°C 0.3 in 8 mm 5.3 in133 mm 13
February 38°F 4°C 22°F -5°C 0.1 in 4 mm 3.9 in100 mm 8
March 61°F 16°C 38°F 3°C 3.5 in 88 mm 3.8 in97 mm 13
April 66°F 19°C 46°F 8°C 4.7 in 120 mm 5
May 74°F 24°C 54°F 12°C 3.0 in 77 mm 10
June 87°F 30°C 67°F 19°C 2.4 in 61 mm 10
July 89°F 32°C 72°F 22°C 6.0 in 152 mm 7
August 84°F 29°C 65°F 18°C 1.8 in 45 mm 14
September 84°F 29°C 58°F 14°C 0.8 in 19 mm 15
October 72°F 22°C 51°F 11°C 1.4 in 37 mm 14
November 54°F 12°C 37°F 3°C 1.6 in 39 mm 7.8 in197 mm 10
December 38°F 3°C 22°F -6°C 1.5 in 38 mm 7.9 in202 mm 7

Weather Days by Month

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Month Sunny Days Storm Days
January 13 0
February 8 0
March 13 4
April 5 7
May 10 2
June 10 2
July 7 8
August 14 2
September 15 1
October 14 1
November 10 2
December 7 1