Greenville, Illinois Climate

United States

Pop. 6,666 Elev. 190 m / 623 ft TZ: America/Chicago (UTC-5) ·

Greenville sees warm summers peaking at 88°F (31°C) in July, and frigid winters that bottom out around 19°F (-7°C) in January. Humidity pushes the summer feels-like temperature to around 105°F (41°C). Precipitation occurs on roughly 65 days per year (41.0 in / 1043 mm total), with snow on 5 days and 28 in (717 mm) of annual accumulation. The city averages 133 sunny days per year and around 46 thunderstorm days. Nearby lake water reaches 82°F (28°C) in summer.

Temperature 88°F (31°C) high 19°F (-7°C) low
Feels like 105°F (41°C) high 13°F (-10°C) low
Rain 65 days 41.0 in (1043 mm) /yr
Snow 5 days 28.2 in (717 mm) /yr
Sky 133 sunny 46 stormy
Wind 2.2 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 (%)
49
Jan
60
Feb
51
Mar
65
Apr
62
May
56
Jun
60
Jul
47
Aug
38
Sep
44
Oct
51
Nov
63
Dec
Humidity (%)
66
Jan
64
Feb
52
Mar
61
Apr
63
May
70
Jun
76
Jul
70
Aug
63
Sep
66
Oct
68
Nov
72
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

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Nearby Cities

Nearby

Commercial airport 33 mi Scott AFB/Midamerica Airport (BLV)
Ski resort 71 mi Hidden Valley
National park 77 mi Emmett Till and Mamie Till-Mobley National Monument
Hospital 1 mi Holy Family Hospital
Hiking trail 59 mi ADT - Illinois (South) - J - Seg 3

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 35°F 1°C 19°F -7°C 0.6 in 15 mm 12.5 in317 mm 13
February 43°F 6°C 27°F -3°C 0.9 in 23 mm 6.9 in176 mm 9
March 64°F 18°C 42°F 5°C 3.0 in 76 mm 0.5 in13 mm 15
April 69°F 21°C 49°F 10°C 6.6 in 168 mm 6
May 75°F 24°C 57°F 14°C 5.5 in 139 mm 9
June 85°F 29°C 69°F 21°C 6.2 in 157 mm 8
July 88°F 31°C 73°F 23°C 7.0 in 179 mm 8
August 84°F 29°C 65°F 19°C 1.1 in 27 mm 16
September 83°F 29°C 58°F 15°C 3.2 in 82 mm 17
October 71°F 22°C 51°F 11°C 3.1 in 80 mm 16
November 56°F 13°C 39°F 4°C 3.0 in 75 mm 4.5 in116 mm 10
December 43°F 6°C 28°F -2°C 0.8 in 20 mm 3.8 in96 mm 6

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 13 0
February 9 1
March 15 4
April 6 7
May 9 7
June 8 8
July 8 11
August 16 1
September 17 4
October 16 2
November 10 1
December 6 0

Water Temperatures Data

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Month Lake Avg High
January 33°F 1°C
February 33°F 0°C
March 48°F 9°C
April 58°F 14°C
May 65°F 18°C
June 76°F 24°C
July 82°F 28°C
August 77°F 25°C
September 71°F 22°C
October 62°F 17°C
November 46°F 8°C
December 34°F 1°C