Sherman Illinois Climate Data

Monthly Average Climate Data for Sherman Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.3 °F35.0 °F2.13 in.
February21.6 °F39.7 °F1.98 in.
March30.8 °F51.4 °F2.76 in.
April41.5 °F64.3 °F4.11 in.
May53.1 °F74.3 °F4.62 in.
June62.3 °F82.8 °F4.67 in.
July65.3 °F85.9 °F3.75 in.
August63.2 °F84.4 °F3.36 in.
September54.8 °F79.2 °F3.21 in.
October43.3 °F66.8 °F3.25 in.
November32.5 °F52.1 °F2.98 in.
December23.7 °F40.0 °F2.22 in.
Annual42.5 °F63 °F39.04 in.

Climate Data for Sherman Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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