Downers Grove Illinois Climate Data

Monthly Average Climate Data for Downers Grove Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.9 °F31.7 °F2.19 in.
February18.6 °F35.7 °F2.13 in.
March28.0 °F47.6 °F2.38 in.
April38.3 °F60.1 °F3.98 in.
May49.2 °F71.3 °F4.83 in.
June59.3 °F81.2 °F4.55 in.
July64.1 °F85.2 °F3.95 in.
August62.5 °F83.3 °F4.21 in.
September54.7 °F76.8 °F3.35 in.
October42.5 °F63.4 °F3.58 in.
November31.5 °F48.7 °F2.6 in.
December21.6 °F36.6 °F2.29 in.
Annual40.5 °F60.1 °F40.04 in.

Climate Data for Downers Grove Illinois

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness ZoneZone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation