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Grand Tower, Illinois Climate Averages

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Grand Tower Monthly Climate Averages

January
February
March
April
May
June
July
August
September
October
November
December
Hi 41°F Lo 27°F Hi 45°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 67°F Hi 88°F Lo 70°F Hi 87°F Lo 68°F Hi 81°F Lo 62°F Hi 69°F Lo 51°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
3.9 in 3.9 in 5.8 in 7.1 in 5.8 in 4.1 in 4.5 in 4.2 in 3.4 in 4.6 in 3.9 in 4.2 in
76% 77% 76% 77% 79% 75% 76% 75% 72% 68% 71% 76%
49% 49% 47% 43% 39% 29% 31% 29% 28% 32% 34% 48%
30.1 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
21 18 22 21 21 21 21 23 24 25 23 22
7 7 8 9 10 9 10 8 6 6 6 7
3 3 1 0 0 0 0 0 0 0 1 2
0 0 0 0 0 0 0 0 0 0 0 0
2 2 3 4 5 6 6 6 5 3 2 2
164 147 161 171 198 235 241 249 239 230 220 166
January
February
March
April
May
June
July
August
September
October
November
December
Hi 5°C Lo -3°C Hi 7°C Lo -1°C Hi 14°C Lo 4°C Hi 19°C Lo 9°C Hi 24°C Lo 15°C Hi 30°C Lo 20°C Hi 31°C Lo 21°C Hi 30°C Lo 20°C Hi 27°C Lo 17°C Hi 20°C Lo 11°C Hi 13°C Lo 4°C Hi 8°C Lo 0°C
15 km/h 15 km/h 15 km/h 14 km/h 12 km/h 11 km/h 9 km/h 9 km/h 10 km/h 13 km/h 14 km/h 14 km/h
98 mm 99 mm 147 mm 180 mm 147 mm 103 mm 115 mm 107 mm 85 mm 116 mm 100 mm 106 mm
76% 77% 76% 77% 79% 75% 76% 75% 72% 68% 71% 76%
49% 49% 47% 43% 39% 29% 31% 29% 28% 32% 34% 48%
1021 mb 1020 mb 1018 mb 1015 mb 1015 mb 1014 mb 1015 mb 1015 mb 1017 mb 1017 mb 1021 mb 1020 mb
21 18 22 21 21 21 21 23 24 25 23 22
7 7 8 9 10 9 10 8 6 6 6 7
3 3 1 0 0 0 0 0 0 0 1 2
0 0 0 0 0 0 0 0 0 0 0 0
2 2 3 4 5 6 6 6 5 3 2 2
164 147 161 171 198 235 241 249 239 230 220 166
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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