Griggsville Illinois Climate Data

Monthly Average Climate Data for Griggsville Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.4 °F35.1 °F2.07 in.
February22.0 °F40.2 °F1.9 in.
March31.3 °F51.5 °F2.77 in.
April41.8 °F64.0 °F4.02 in.
May53.2 °F73.7 °F4.57 in.
June62.5 °F82.3 °F4.66 in.
July65.7 °F85.8 °F4.4 in.
August63.4 °F84.8 °F3.26 in.
September54.8 °F78.8 °F3.61 in.
October43.4 °F66.4 °F2.94 in.
November33.1 °F52.3 °F2.87 in.
December23.7 °F40.0 °F2.13 in.
Annual42.8 °F62.9 °F39.2 in.

Climate Data for Griggsville 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 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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