Seymour Illinois Climate Data

Monthly Average Climate Data for Seymour Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.9 °C0.9 °C57.66 mm
February-6.3 °C3.3 °C50.55 mm
March-1.2 °C9.9 °C69.6 mm
April4.7 °C17.4 °C103.63 mm
May11.3 °C23.2 °C114.55 mm
June16.2 °C27.9 °C118.11 mm
July17.8 °C29 °C104.39 mm
August16.4 °C28.2 °C81.53 mm
September12.4 °C25.9 °C80.52 mm
October5.8 °C18.7 °C87.12 mm
November-0.1 °C10.6 °C78.23 mm
December-4.8 °C3.6 °C61.21 mm
Annual5.4 °C16.6 °C1007.1 mm

Climate Data for Seymour 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 : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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