Decatur Weather

US Geography / US Weather / Illinois Weather / Decatur

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg. High 34 38 51 65 76 84 87 85 80 67 52 38
Avg. Low 16 20 31 42 51 60 64 62 55 44 34 21
Mean 25 30 42 54 64 74 76 74 68 56 44 30
Avg. Precip. 2.0 in 2.0 in 3.4 in 3.8 in 4.3 in 3.9 in 4.3 in 4.1 in 3.4 in 2.8 in 3.1 in 3.3 in

Degrees in Fahrenheit

 

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