Sullivan Ohio Climate Data

Monthly Average Climate Data for Sullivan Ohio

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.8 °F33.4 °F2.83 in.
February19.1 °F36.1 °F2.14 in.
March27.1 °F45.9 °F2.94 in.
April38.0 °F59.8 °F3.79 in.
May48.7 °F70.4 °F4.05 in.
June58.0 °F79.1 °F4.31 in.
July61.3 °F82.6 °F4.19 in.
August59.6 °F81.2 °F3.83 in.
September52.4 °F75.2 °F3.38 in.
October41.6 °F62.7 °F3.15 in.
November32.0 °F49.4 °F2.91 in.
December23.8 °F38.1 °F2.7 in.
Annual40 °F59.5 °F40.22 in.

Climate Data for Sullivan Ohio

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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