Deerfield Illinois Climate Data

Monthly Average Climate Data for Deerfield Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.4 °F31.1 °F2.2 in.
February20.1 °F34.8 °F2.02 in.
March28.9 °F44.8 °F2.24 in.
April38.9 °F56.4 °F3.85 in.
May49.7 °F68.1 °F4.56 in.
June59.6 °F78.3 °F4.32 in.
July65.5 °F82.9 °F3.72 in.
August64.5 °F81.2 °F3.99 in.
September56.8 °F74.7 °F3.64 in.
October44.8 °F62.3 °F3.41 in.
November33.2 °F47.9 °F2.56 in.
December23.4 °F36.6 °F2.17 in.
Annual41.9 °F58.3 °F38.68 in.

Climate Data for Deerfield Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation