Gillespie Illinois Climate Data

Monthly Average Climate Data for Gillespie Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January20.4 °F36.2 °F2.51 in.
February23.8 °F41.5 °F2.22 in.
March32.8 °F52.5 °F3.09 in.
April43.2 °F64.6 °F4.74 in.
May54.4 °F74.3 °F4.99 in.
June63.3 °F83.1 °F4.33 in.
July66.4 °F86.0 °F3.94 in.
August64.3 °F85.2 °F3.44 in.
September55.8 °F79.5 °F3.33 in.
October44.5 °F67.4 °F3.25 in.
November34.4 °F52.8 °F3.47 in.
December25.4 °F41.1 °F2.56 in.
Annual44.1 °F63.7 °F41.87 in.

Climate Data for Gillespie Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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