Prairie du Rocher Illinois Climate Data

Monthly Average Climate Data for Prairie du Rocher Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.1 °F41.1 °F2.5 in.
February26.6 °F46.4 °F2.39 in.
March34.7 °F56.3 °F3.59 in.
April44.8 °F68.1 °F4.88 in.
May55.7 °F77.4 °F5.15 in.
June64.7 °F86.3 °F4.26 in.
July68.3 °F89.3 °F4.16 in.
August66.1 °F88.4 °F3.32 in.
September57.4 °F81.8 °F3.39 in.
October45.6 °F70.4 °F3.19 in.
November35.5 °F56.2 °F3.63 in.
December26.9 °F44.9 °F2.91 in.
Annual45.8 °F67.2 °F43.37 in.

Climate Data for Prairie du Rocher Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com