Clayton Illinois Climate Data

Monthly Average Climate Data for Clayton Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.2 °C1.1 °C47.24 mm
February-6.2 °C3.9 °C49.02 mm
March-0.8 °C10.4 °C64.01 mm
April5.2 °C17.2 °C102.11 mm
May11.6 °C22.8 °C131.32 mm
June16.8 °C27.8 °C122.68 mm
July18.7 °C29.8 °C103.12 mm
August17.3 °C28.9 °C93.98 mm
September12.6 °C25.7 °C88.14 mm
October6.3 °C18.7 °C82.3 mm
November0.2 °C10.8 °C68.07 mm
December-5.2 °C3.8 °C52.83 mm
Annual5.7 °C16.7 °C1004.82 mm

Climate Data for Clayton Illinois

Average First Frost DateOct. 21 - Oct. 31
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
2024 plantmaps.com