Delavan Illinois Climate Data

Monthly Average Climate Data for Delavan Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.1 °F33.8 °F2.14 in.
February20.6 °F38.7 °F1.93 in.
March30.2 °F50.7 °F2.58 in.
April40.9 °F63.8 °F3.86 in.
May52.6 °F74.3 °F4.64 in.
June62.0 °F83.0 °F4.45 in.
July64.8 °F86.0 °F4.08 in.
August62.7 °F84.4 °F3.52 in.
September54.6 °F79.4 °F3.34 in.
October42.9 °F66.6 °F3.15 in.
November32.0 °F51.4 °F2.82 in.
December22.8 °F39.0 °F2.21 in.
Annual41.9 °F62.6 °F38.72 in.

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