Richmond Illinois Climate Data

Monthly Average Climate Data for Richmond Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.4 °F29.0 °F1.78 in.
February16.1 °F32.9 °F1.85 in.
March25.4 °F44.2 °F2.17 in.
April35.7 °F57.1 °F3.78 in.
May46.8 °F68.6 °F4.41 in.
June56.9 °F78.4 °F4.84 in.
July61.3 °F82.4 °F3.74 in.
August59.6 °F80.8 °F3.82 in.
September51.8 °F74.2 °F3.61 in.
October40.5 °F60.9 °F3.05 in.
November29.8 °F46.7 °F2.41 in.
December19.5 °F34.2 °F1.99 in.
Annual38.1 °F57.5 °F37.45 in.

Climate Data for Richmond 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 5b : -15°F to -10°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
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