Saybrook Illinois Climate Data

Monthly Average Climate Data for Saybrook Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.4 °F32.6 °F2.22 in.
February19.5 °F37.1 °F1.89 in.
March28.7 °F48.8 °F2.61 in.
April39.5 °F62.1 °F3.72 in.
May51.6 °F73.2 °F4.46 in.
June61.1 °F81.6 °F4.39 in.
July63.7 °F84.2 °F4.04 in.
August61.3 °F82.8 °F3.51 in.
September53.6 °F77.9 °F3.3 in.
October42.1 °F65.2 °F3.3 in.
November31.2 °F50.2 °F2.73 in.
December21.8 °F37.5 °F2.19 in.
Annual40.9 °F61.1 °F38.36 in.

Climate Data for Saybrook 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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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