Barstow Illinois Climate Data

Monthly Average Climate Data for Barstow Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.5 °F30.6 °F1.54 in.
February18.1 °F35.1 °F1.75 in.
March28.8 °F47.8 °F2.52 in.
April39.9 °F61.0 °F3.69 in.
May51.7 °F72.3 °F4.82 in.
June61.8 °F81.8 °F4.84 in.
July65.4 °F85.0 °F4.3 in.
August63.3 °F83.1 °F3.97 in.
September55.0 °F76.9 °F3.49 in.
October43.2 °F64.0 °F2.84 in.
November31.2 °F48.8 °F2.27 in.
December20.7 °F36.0 °F2.02 in.
Annual41.1 °F60.2 °F38.05 in.

Climate Data for Barstow Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°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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