Merrimac Wisconsin Climate Data

Monthly Average Climate Data for Merrimac Wisconsin

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January9.6 °F27.2 °F1.36 in.
February12.3 °F31.6 °F1.37 in.
March22.8 °F43.5 °F2.08 in.
April34.7 °F57.1 °F3.93 in.
May47.0 °F69.4 °F4.35 in.
June57.4 °F79.0 °F5.43 in.
July61.2 °F82.7 °F4.4 in.
August58.8 °F80.8 °F4.29 in.
September50.6 °F73.2 °F3.58 in.
October38.9 °F60.2 °F2.82 in.
November27.6 °F45.0 °F2.06 in.
December16.8 °F32.5 °F1.64 in.
Annual36.5 °F56.9 °F37.31 in.

Climate Data for Merrimac Wisconsin

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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