Sullivan Indiana Climate Data

Monthly Average Climate Data for Sullivan Indiana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.6 °F37.8 °F3.25 in.
February24.5 °F42.7 °F2.46 in.
March33.4 °F53.7 °F3.47 in.
April43.9 °F66.1 °F5.03 in.
May54.3 °F75.8 °F4.83 in.
June63.0 °F83.8 °F4.66 in.
July65.8 °F86.8 °F4.3 in.
August63.7 °F85.9 °F3.07 in.
September56.1 °F80.4 °F3.55 in.
October44.6 °F68.6 °F3.59 in.
November34.4 °F54.2 °F3.66 in.
December26.3 °F42.4 °F3.18 in.
Annual44.3 °F64.9 °F45.05 in.

Climate Data for Sullivan Indiana

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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