Union Ohio Climate Data

Monthly Average Climate Data for Union Ohio

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January20.4 °F35.9 °F3.04 in.
February22.6 °F39.7 °F2.3 in.
March30.9 °F49.9 °F3.3 in.
April41.7 °F62.7 °F4.22 in.
May52.8 °F72.9 °F4.53 in.
June61.7 °F81.4 °F4.36 in.
July64.7 °F84.5 °F4.11 in.
August62.8 °F83.6 °F3.02 in.
September55.3 °F77.6 °F3.19 in.
October43.8 °F65.3 °F2.87 in.
November33.5 °F51.7 °F3.06 in.
December25.7 °F40.4 °F3.08 in.
Annual43 °F62.1 °F41.08 in.

Climate Data for Union Ohio

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
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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