Adair Illinois Climate Data

Monthly Average Climate Data for Adair Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.8 °F33.0 °F1.87 in.
February19.4 °F37.7 °F1.9 in.
March29.5 °F50.2 °F2.47 in.
April40.1 °F63.2 °F3.88 in.
May52.1 °F73.7 °F5.06 in.
June61.6 °F82.4 °F4.85 in.
July64.7 °F85.5 °F4.03 in.
August62.3 °F83.8 °F3.54 in.
September54.0 °F78.3 °F3.65 in.
October42.2 °F65.9 °F3.08 in.
November31.2 °F50.8 °F2.61 in.
December21.6 °F38.2 °F1.98 in.
Annual41.2 °F61.9 °F38.92 in.

Climate Data for Adair 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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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