Green Bay Wisconsin Climate Data

Monthly Average Climate Data for Green Bay Wisconsin

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January9.9 °F25.5 °F1.55 in.
February11.1 °F28.7 °F1.2 in.
March21.1 °F39.3 °F1.84 in.
April32.4 °F52.6 °F3.24 in.
May43.8 °F65.6 °F3.76 in.
June53.8 °F75.1 °F4.08 in.
July58.6 °F79.8 °F3.67 in.
August57.4 °F78.1 °F3.42 in.
September49.2 °F71.0 °F3.34 in.
October38.2 °F57.6 °F2.81 in.
November27.5 °F43.4 °F1.94 in.
December16.8 °F31.2 °F1.77 in.
Annual35 °F54 °F32.62 in.

Climate Data for Green Bay Wisconsin

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year