Chestnut Illinois Climate Data

Monthly Average Climate Data for Chestnut Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.1 °F34.6 °F2.23 in.
February21.3 °F39.5 °F2.05 in.
March30.5 °F51.0 °F2.73 in.
April41.3 °F64.1 °F3.97 in.
May52.8 °F74.3 °F4.33 in.
June62.1 °F83.1 °F4.42 in.
July65.0 °F85.9 °F4.17 in.
August63.0 °F84.2 °F3.25 in.
September54.7 °F79.3 °F3.0 in.
October43.1 °F66.6 °F3.22 in.
November32.3 °F51.7 °F2.9 in.
December23.7 °F39.5 °F2.27 in.
Annual42.3 °F62.8 °F38.54 in.

Climate Data for Chestnut 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
2024 plantmaps.com