Harlan Indiana Climate Data

Monthly Average Climate Data for Harlan Indiana

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.1 °C0.2 °C58.67 mm
February-7.2 °C2.1 °C49.28 mm
March-2.4 °C8.2 °C62.23 mm
April3.2 °C15.7 °C91.44 mm
May9.6 °C21.9 °C113.28 mm
June15.2 °C26.9 °C98.55 mm
July16.9 °C29.2 °C95 mm
August15.7 °C28 °C96.27 mm
September11.6 °C24.8 °C75.44 mm
October5.5 °C17.7 °C67.82 mm
November-0.1 °C9.5 °C73.15 mm
December-4.9 °C2.9 °C57.66 mm
Annual4.6 °C15.6 °C938.79 mm

Climate Data for Harlan Indiana

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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