Fairfield, Illinois Climate

United States

Pop. 5,040 Elev. 134 m / 440 ft TZ: America/Chicago (UTC-5) ·

Fairfield sees warm summers peaking at 90°F (32°C) in July, and frigid winters that bottom out around 20°F (-7°C) in January. Humidity pushes the summer feels-like temperature to around 107°F (42°C). Precipitation occurs on roughly 67 days per year (42.4 in / 1078 mm total), with snow on 4 days and 23 in (591 mm) of annual accumulation. The city averages 122 sunny days per year and around 46 thunderstorm days. Nearby lake water reaches 83°F (28°C) in summer.

Temperature 90°F (32°C) high 20°F (-7°C) low
Feels like 107°F (42°C) high 15°F (-10°C) low
Rain 67 days 42.4 in (1078 mm) /yr
Snow 4 days 23.3 in (591 mm) /yr
Sky 122 sunny 46 stormy
Wind 2.3 mph (1.0 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 (%)
48
Jan
61
Feb
53
Mar
63
Apr
66
May
57
Jun
57
Jul
43
Aug
36
Sep
44
Oct
52
Nov
63
Dec
Humidity (%)
66
Jan
67
Feb
52
Mar
61
Apr
63
May
67
Jun
73
Jul
66
Aug
61
Sep
67
Oct
67
Nov
70
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

Cities with Similar Climate

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Nearby Cities

Nearby

Commercial airport 51 mi Evansville Regional Airport (EVV)
Ski resort 125 mi Hidden Valley
National park 52 mi Emmett Till and Mamie Till-Mobley National Monument
Mountain peak (5,125 ft) 319 mi Little Haw Knob
Hospital 1 mi Fairfield Memorial Hospital
Hiking trail 44 mi ADT - Illinois (South) - J - Seg 1

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 36°F 2°C 20°F -7°C 1.6 in 39 mm 11.1 in282 mm 12
February 45°F 7°C 28°F -2°C 3.0 in 77 mm 6.8 in172 mm 8
March 65°F 18°C 42°F 6°C 3.7 in 93 mm 0.3 in7 mm 10
April 71°F 21°C 50°F 10°C 7.5 in 191 mm 5
May 75°F 24°C 58°F 15°C 4.9 in 125 mm 6
June 86°F 30°C 70°F 21°C 4.6 in 117 mm 9
July 90°F 32°C 74°F 23°C 5.1 in 130 mm 9
August 85°F 30°C 66°F 19°C 0.8 in 21 mm 13
September 84°F 29°C 60°F 15°C 3.3 in 85 mm 17
October 71°F 22°C 51°F 11°C 3.4 in 86 mm 18
November 57°F 14°C 40°F 4°C 3.5 in 88 mm 1.1 in29 mm 9
December 46°F 8°C 32°F 0°C 1.0 in 26 mm 4.0 in101 mm 6

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 12 0
February 8 3
March 10 4
April 5 8
May 6 5
June 9 5
July 9 9
August 13 2
September 17 3
October 18 3
November 9 3
December 6 1

Water Temperatures Data

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Month Lake Avg High
January 34°F 1°C
February 36°F 2°C
March 48°F 9°C
April 59°F 15°C
May 66°F 19°C
June 77°F 25°C
July 83°F 28°C
August 79°F 26°C
September 72°F 22°C
October 64°F 18°C
November 49°F 9°C
December 37°F 3°C