Bloomington Illinois Climate Data

Monthly Average Climate Data for Bloomington Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.2 °F32.4 °F2.32 in.
February19.7 °F37.3 °F1.91 in.
March29.0 °F49.3 °F2.71 in.
April40.0 °F62.6 °F3.79 in.
May51.6 °F73.4 °F4.52 in.
June61.3 °F82.3 °F4.14 in.
July64.4 °F85.4 °F3.88 in.
August62.4 °F83.4 °F3.67 in.
September54.6 °F78.3 °F3.32 in.
October43.1 °F65.3 °F3.31 in.
November31.7 °F50.3 °F2.82 in.
December22.1 °F37.6 °F2.38 in.
Annual41.3 °F61.5 °F38.77 in.

Climate Data for Bloomington Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 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