Macomb Illinois Climate Data

Monthly Average Climate Data for Macomb Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.6 °F32.6 °F1.82 in.
February19.2 °F37.3 °F1.9 in.
March29.3 °F49.7 °F2.3 in.
April39.9 °F62.8 °F3.92 in.
May52.0 °F73.3 °F5.15 in.
June61.6 °F82.0 °F4.93 in.
July64.6 °F84.9 °F4.02 in.
August62.1 °F83.3 °F3.5 in.
September53.7 °F78.0 °F3.76 in.
October42.2 °F65.6 °F3.13 in.
November31.0 °F50.5 °F2.68 in.
December21.3 °F37.8 °F1.91 in.
Annual41 °F61.5 °F39.02 in.

Climate Data for Macomb Illinois

Average First Frost DateOct. 11 - Oct. 20
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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation