Bellflower Illinois Climate Data

Monthly Average Climate Data for Bellflower Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.6 °F32.9 °F2.25 in.
February19.9 °F37.3 °F1.95 in.
March29.0 °F49.1 °F2.66 in.
April39.7 °F62.5 °F3.88 in.
May51.7 °F73.4 °F4.46 in.
June61.1 °F81.9 °F4.51 in.
July63.9 °F84.5 °F4.14 in.
August61.5 °F83.0 °F3.53 in.
September53.9 °F78.2 °F3.3 in.
October42.3 °F65.4 °F3.33 in.
November31.5 °F50.4 °F2.89 in.
December22.2 °F37.7 °F2.3 in.
Annual41.1 °F61.4 °F39.2 in.

Climate Data for Bellflower 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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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