Lake Forest Weather

US Geography / US Weather / Illinois Weather / Lake Forest

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg. High 27 31 42 54 66 76 81 78 72 61 47 34
Avg. Low 10 14 25 35 45 55 61 58 52 41 30 17
Mean 18 24 34 45 56 66 71 70 64 51 38 25
Avg. Precip. 1.7 in 1.3 in 2.5 in 3.5 in 3.3 in 3.6 in 3.7 in 4.0 in 3.7 in 2.3 in 2.4 in 2.3 in

Degrees in Fahrenheit

 

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