Normal, Illinois Climate

United States

Pop. 54,373 Elev. 248 m / 814 ft TZ: America/Chicago (UTC-5) ·

Normal is largely arid, with warm summers peaking at 86°F (30°C) in July and cold winters around 17°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 99°F (37°C), while wind chill can drive winter lows to 9°F (-13°C). Precipitation occurs on roughly 48 days per year (31.8 in / 807 mm total), with snow on 3 days and 30 in (764 mm) of annual accumulation. The city averages 117 sunny days per year and around 33 thunderstorm days. Nearby lake water reaches 79°F (26°C) in summer.

Temperature 86°F (30°C) high 17°F (-8°C) low
Feels like 99°F (37°C) high 9°F (-13°C) low
Rain 48 days 31.8 in (807 mm) /yr
Snow 3 days 30.1 in (764 mm) /yr
Sky 117 sunny 33 stormy
Wind 3.0 mph (1.3 m/s) avg

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Monthly Climate Chart

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

Sky & Air by Month

Cloud cover (%)
53
Jan
60
Feb
53
Mar
67
Apr
60
May
54
Jun
67
Jul
50
Aug
35
Sep
45
Oct
51
Nov
71
Dec
Humidity (%)
64
Jan
65
Feb
57
Mar
61
Apr
61
May
70
Jun
76
Jul
74
Aug
60
Sep
61
Oct
66
Nov
78
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

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Nearby Cities

Nearby

Commercial airport 5 mi Central Illinois Regional Airport at Bloomington-Normal (BMI)
Ski resort 103 mi
National park 109 mi Historic Pullman Foundation Exhibit Hall
Hospital 1 mi Carle BroMenn Medical Center
Hiking trail 27 mi Meadow Valley Park

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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 11 mm 6.6 in168 mm 15
February 38°F 3°C 23°F -5°C 0.3 in 7 mm 5.7 in144 mm 8
March 60°F 16°C 38°F 4°C 3.3 in 84 mm 2.6 in67 mm 10
April 65°F 19°C 45°F 7°C 4.2 in 107 mm 0.1 in3 mm 4
May 73°F 23°C 53°F 12°C 3.4 in 86 mm 10
June 84°F 29°C 66°F 19°C 4.8 in 122 mm 8
July 86°F 30°C 71°F 21°C 5.5 in 140 mm 3
August 82°F 28°C 64°F 18°C 2.3 in 58 mm 13
September 82°F 28°C 57°F 14°C 1.3 in 33 mm 17
October 70°F 21°C 50°F 10°C 3.4 in 87 mm 15
November 53°F 11°C 36°F 2°C 1.6 in 41 mm 7.7 in197 mm 10
December 37°F 3°C 21°F -6°C 1.2 in 31 mm 7.3 in186 mm 4

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 15 0
February 8 0
March 10 5
April 4 3
May 10 2
June 8 4
July 3 7
August 13 5
September 17 2
October 15 2
November 10 2
December 4 1

Water Temperatures Data

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Month Lake Avg High
January 32°F 0°C
February 32°F 0°C
March 42°F 6°C
April 53°F 12°C
May 61°F 16°C
June 73°F 23°C
July 79°F 26°C
August 75°F 24°C
September 68°F 20°C
October 59°F 15°C
November 43°F 6°C
December 32°F 0°C