Harlan Indiana Climate Data

Monthly Average Climate Data for Harlan Indiana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.5 °F32.3 °F2.31 in.
February19.1 °F35.8 °F1.94 in.
March27.6 °F46.8 °F2.45 in.
April37.8 °F60.2 °F3.6 in.
May49.3 °F71.5 °F4.46 in.
June59.3 °F80.4 °F3.88 in.
July62.4 °F84.6 °F3.74 in.
August60.3 °F82.4 °F3.79 in.
September52.8 °F76.7 °F2.97 in.
October41.9 °F63.8 °F2.67 in.
November31.8 °F49.1 °F2.88 in.
December23.1 °F37.2 °F2.27 in.
Annual40.2 °F60.1 °F36.96 in.

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 : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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