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Grand Chain, Illinois Climate Averages

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Grand Chain Monthly Climate Averages

January
February
March
April
May
June
July
August
September
October
November
December
Hi 40°F Lo 27°F Hi 44°F Lo 30°F Hi 56°F Lo 40°F Hi 66°F Lo 48°F Hi 76°F Lo 58°F Hi 85°F Lo 66°F Hi 88°F Lo 68°F Hi 87°F Lo 66°F Hi 81°F Lo 60°F Hi 69°F Lo 50°F Hi 55°F Lo 39°F Hi 46°F Lo 33°F
9 mph 9 mph 9 mph 9 mph 8 mph 7 mph 6 mph 6 mph 6 mph 8 mph 9 mph 9 mph
2.3 in 3 in 3.6 in 4.1 in 4.1 in 3.7 in 3.3 in 3.4 in 2.3 in 2.6 in 2.5 in 2.4 in
76% 79% 78% 77% 79% 76% 76% 75% 73% 71% 73% 77%
50% 51% 49% 42% 38% 27% 29% 28% 28% 33% 35% 47%
30.2 in 30.1 in 30.1 in 30.0 in 30.0 in 29.9 in 30.0 in 30.0 in 30.0 in 30.0 in 30.1 in 30.1 in
20 17 22 24 24 24 25 25 27 27 25 24
5 5 7 6 7 7 6 6 3 4 4 4
6 6 2 1 0 0 0 0 0 0 1 3
5 3 4 4 5 5 5 6 5 3 2 3
2 2 3 4 6 6 6 6 5 3 3 2
238 214 245 269 300 325 342 342 317 301 278 252
January
February
March
April
May
June
July
August
September
October
November
December
Hi 4°C Lo -3°C Hi 7°C Lo -1°C Hi 13°C Lo 4°C Hi 19°C Lo 9°C Hi 24°C Lo 14°C Hi 30°C Lo 19°C Hi 31°C Lo 20°C Hi 31°C Lo 19°C Hi 27°C Lo 16°C Hi 20°C Lo 10°C Hi 13°C Lo 4°C Hi 8°C Lo 1°C
15 km/h 15 km/h 15 km/h 14 km/h 12 km/h 10 km/h 9 km/h 9 km/h 10 km/h 13 km/h 14 km/h 14 km/h
58 mm 75 mm 92 mm 103 mm 105 mm 94 mm 83 mm 86 mm 58 mm 67 mm 63 mm 60 mm
76% 79% 78% 77% 79% 76% 76% 75% 73% 71% 73% 77%
50% 51% 49% 42% 38% 27% 29% 28% 28% 33% 35% 47%
1021 mb 1021 mb 1019 mb 1015 mb 1015 mb 1014 mb 1015 mb 1015 mb 1017 mb 1017 mb 1021 mb 1020 mb
20 17 22 24 24 24 25 25 27 27 25 24
5 5 7 6 7 7 6 6 3 4 4 4
6 6 2 1 0 0 0 0 0 0 1 3
5 3 4 4 5 5 5 6 5 3 2 3
2 2 3 4 6 6 6 6 5 3 3 2
238 214 245 269 300 325 342 342 317 301 278 252
Month
Avg. Temperatures
Avg. Wind Speed
Avg. Precipitation
Average Humidity
Avg. Cloud Cover
Pressure Average
Average Dry Days
Avg. Precip. Days
Avg. Snow Days
Average Fog Days
Average UV Index
Avg. Hours of Sun
Averages are based on historical weather data from the past 10 years.

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