Eureka Illinois Climate Data

Monthly Average Climate Data for Eureka Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9 °C0.3 °C55.37 mm
February-7.1 °C3 °C50.04 mm
March-1.7 °C9.8 °C66.8 mm
April4.2 °C17.2 °C94.23 mm
May10.7 °C23.1 °C114.81 mm
June16.1 °C27.9 °C111.76 mm
July17.8 °C29.7 °C94.23 mm
August16.7 °C28.7 °C90.42 mm
September12.2 °C26.1 °C87.38 mm
October5.8 °C18.8 °C79.76 mm
November-0.4 °C10.3 °C69.09 mm
December-5.8 °C3.2 °C53.34 mm
Annual5 °C16.5 °C967.23 mm

Climate Data for Eureka 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 : -26.1°C to -23.3°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