Anna, Illinois Climate

United States

Pop. 4,321 Elev. 189 m / 620 ft TZ: America/Chicago (UTC-5) ·

Summers in Anna are warm, with July highs around 88°F (31°C), while winters are cold with January lows of 25°F (-4°C). Humidity pushes the summer feels-like temperature to around 107°F (42°C). Expect around 71 rainy days annually (49.5 in / 1257 mm total), with snow on 4 days and 18 in (469 mm) of annual accumulation. The city averages 142 sunny days per year and around 53 thunderstorm days. Nearby lake water reaches 85°F (29°C) in summer.

Temperature 88°F (31°C) high 25°F (-4°C) low
Feels like 107°F (41°C) high 25°F (-4°C) low
Rain 71 days 49.5 in (1257 mm) /yr
Snow 4 days 18.5 in (469 mm) /yr
Sky 142 sunny 53 stormy
Wind 2.1 mph (0.9 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 (%)
46
Jan
61
Feb
50
Mar
61
Apr
67
May
55
Jun
50
Jul
39
Aug
40
Sep
39
Oct
54
Nov
56
Dec
Humidity (%)
62
Jan
70
Feb
52
Mar
65
Apr
72
May
76
Jun
79
Jul
67
Aug
63
Sep
68
Oct
68
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 24 mi Veterans Airport of Southern Illinois (MWA)
Ski resort 107 mi Hidden Valley
National park 29 mi Emmett Till and Mamie Till-Mobley National Monument
Hospital 0 mi Union County Hospital
Hiking trail 9 mi River to River Segment 6 - Giant City to Alto Pass

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 39°F 4°C 25°F -4°C 3.5 in 89 mm 6.2 in157 mm 16
February 46°F 8°C 28°F -2°C 4.2 in 107 mm 10.0 in254 mm 7
March 66°F 19°C 44°F 7°C 2.8 in 71 mm 0.1 in2 mm 12
April 72°F 22°C 52°F 11°C 9.0 in 228 mm 7
May 74°F 23°C 59°F 15°C 7.2 in 183 mm 7
June 85°F 29°C 70°F 21°C 6.7 in 170 mm 9
July 88°F 31°C 74°F 23°C 4.6 in 118 mm 13
August 87°F 30°C 67°F 19°C 0.6 in 16 mm 18
September 85°F 29°C 61°F 16°C 2.3 in 59 mm 14
October 73°F 23°C 52°F 11°C 4.5 in 115 mm 17
November 60°F 15°C 42°F 6°C 3.0 in 76 mm 0.6 in15 mm 11
December 48°F 9°C 33°F 1°C 1.0 in 25 mm 1.6 in40 mm 11

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 16 3
February 7 3
March 12 3
April 7 8
May 7 10
June 9 7
July 13 8
August 18 1
September 14 3
October 17 3
November 11 3
December 11 1

Water Temperatures Data

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Month Lake Avg High
January 35°F 1°C
February 35°F 2°C
March 46°F 8°C
April 58°F 15°C
May 66°F 19°C
June 77°F 25°C
July 85°F 29°C
August 80°F 27°C
September 73°F 23°C
October 65°F 18°C
November 50°F 10°C
December 38°F 3°C