Troy Illinois Climate Data

Monthly Average Climate Data for Troy Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.6 °C4.3 °C69.6 mm
February-2.9 °C7.3 °C61.47 mm
March2.1 °C13.1 °C88.14 mm
April8 °C19.5 °C126.24 mm
May14.1 °C24.6 °C132.08 mm
June19 °C29.4 °C121.92 mm
July21.1 °C31.1 °C107.95 mm
August19.9 °C30.6 °C95 mm
September15.3 °C27.1 °C82.8 mm
October9.1 °C20.6 °C83.57 mm
November2.6 °C12.7 °C93.47 mm
December-2.1 °C6.8 °C70.36 mm
Annual8.5 °C18.9 °C1132.6 mm

Climate Data for Troy Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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