Athens Illinois Climate Data

Monthly Average Climate Data for Athens Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.2 °F34.9 °F2.13 in.
February21.6 °F39.7 °F1.92 in.
March30.8 °F51.4 °F2.65 in.
April41.5 °F64.3 °F3.99 in.
May53.1 °F74.1 °F4.55 in.
June62.4 °F82.4 °F4.57 in.
July65.4 °F85.5 °F3.79 in.
August63.2 °F84.1 °F3.5 in.
September54.9 °F78.9 °F3.22 in.
October43.3 °F66.5 °F3.24 in.
November32.6 °F52.0 °F3.02 in.
December23.7 °F40.1 °F2.21 in.
Annual42.6 °F62.8 °F38.79 in.

Climate Data for Athens 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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