Stockton Illinois Climate Data

Monthly Average Climate Data for Stockton Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.6 °F27.4 °F1.33 in.
February15.0 °F31.7 °F1.57 in.
March25.6 °F44.2 °F2.11 in.
April36.4 °F58.0 °F3.84 in.
May48.2 °F69.6 °F4.27 in.
June58.3 °F78.7 °F5.66 in.
July61.4 °F81.6 °F4.57 in.
August59.3 °F79.9 °F4.02 in.
September51.1 °F73.9 °F3.57 in.
October39.8 °F61.2 °F2.89 in.
November28.7 °F45.7 °F2.35 in.
December17.9 °F32.8 °F1.75 in.
Annual37.8 °F57.1 °F37.93 in.

Climate Data for Stockton Illinois

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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