Nelson Illinois Climate Data

Monthly Average Climate Data for Nelson Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.9 °F29.3 °F1.74 in.
February16.7 °F33.9 °F1.77 in.
March27.2 °F46.4 °F2.41 in.
April37.8 °F59.9 °F3.73 in.
May49.7 °F71.3 °F4.96 in.
June59.6 °F80.3 °F5.39 in.
July62.8 °F83.2 °F4.31 in.
August60.7 °F81.6 °F4.23 in.
September52.4 °F75.9 °F3.78 in.
October40.7 °F62.9 °F2.83 in.
November29.5 °F47.6 °F2.33 in.
December19.5 °F35.0 °F1.98 in.
Annual39.1 °F58.9 °F39.46 in.

Climate Data for Nelson Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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