Alton Weather

US Geography / US Weather / Illinois Weather / Alton

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg. High 36 40 52 64 74 84 88 86 78 67 54 40
Avg. Low 17 21 32 44 54 64 68 66 57 46 35 24
Mean 27 31 44 55 65 74 78 76 68 57 45 32
Avg. Precip. 1.9 in 2.1 in 3.6 in 3.7 in 4.3 in 3.3 in 3.7 in 3.3 in 3.1 in 2.8 in 3.4 in 3.3 in

Degrees in Fahrenheit

 

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