Altona Illinois Climate Data

Monthly Average Climate Data for Altona Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.8 °F30.4 °F1.69 in.
February17.1 °F35.0 °F1.96 in.
March27.6 °F48.1 °F2.41 in.
April38.3 °F61.4 °F3.9 in.
May50.5 °F72.2 °F5.21 in.
June60.3 °F81.0 °F4.7 in.
July63.5 °F84.0 °F3.91 in.
August61.3 °F82.4 °F3.71 in.
September52.9 °F76.6 °F3.82 in.
October41.4 °F64.0 °F2.88 in.
November29.8 °F48.7 °F2.46 in.
December19.7 °F35.9 °F2.12 in.
Annual39.7 °F60 °F38.77 in.

Climate Data for Altona Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°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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