Astoria Illinois Climate Data

Monthly Average Climate Data for Astoria Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.6 °F33.6 °F1.99 in.
February20.3 °F38.4 °F1.91 in.
March29.9 °F50.4 °F2.52 in.
April40.6 °F63.2 °F3.9 in.
May52.3 °F73.4 °F4.91 in.
June61.7 °F82.1 °F4.76 in.
July64.9 °F85.3 °F4.06 in.
August62.4 °F83.9 °F3.58 in.
September54.1 °F78.4 °F3.54 in.
October42.7 °F65.7 °F3.09 in.
November31.6 °F51.1 °F2.79 in.
December22.3 °F38.8 °F2.16 in.
Annual41.6 °F62 °F39.21 in.

Climate Data for Astoria Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
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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