Blue Island Illinois Climate Data

Monthly Average Climate Data for Blue Island Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.9 °F32.2 °F2.19 in.
February20.6 °F35.9 °F2.08 in.
March29.8 °F46.7 °F2.38 in.
April40.0 °F59.3 °F3.9 in.
May50.9 °F70.3 °F4.57 in.
June61.0 °F80.3 °F4.39 in.
July65.9 °F84.5 °F4.38 in.
August64.4 °F82.6 °F4.18 in.
September56.8 °F76.4 °F3.25 in.
October44.6 °F63.4 °F3.49 in.
November33.6 °F49.3 °F2.66 in.
December23.4 °F37.3 °F2.3 in.
Annual42.4 °F59.9 °F39.77 in.

Climate Data for Blue Island 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 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation