Climate
Green Bay weather by month
Average highs, lows, rain and snow for every month, from 30 years of weather records.
Average temperatures
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Best time to visit: May, August, September, when highs are mild and rain is lightest.
Month by month
| Month | High | Low | Rain | Snow | Wet days |
|---|---|---|---|---|---|
| January | 26°F | 11°F | 1.4 in | 14.3 in | 11 |
| February | 29°F | 13°F | 1.2 in | 12.0 in | 9 |
| March | 40°F | 24°F | 2.0 in | 8.1 in | 10 |
| April | 54°F | 35°F | 3.0 in | 4.7 in | 12 |
| May | 67°F | 46°F | 3.4 in | 0.00 in | 12 |
| June | 77°F | 56°F | 4.1 in | 0.00 in | 11 |
| July | 81°F | 60°F | 3.6 in | 0.00 in | 11 |
| August | 79°F | 58°F | 3.4 in | 0.00 in | 10 |
| September | 72°F | 50°F | 3.2 in | 0.00 in | 10 |
| October | 58°F | 40°F | 2.7 in | 0.30 in | 10 |
| November | 44°F | 29°F | 2.0 in | 3.1 in | 10 |
| December | 31°F | 18°F | 1.8 in | 13.1 in | 11 |
NOAA U.S. Climate Normals 1991–2020, Green Bay, Wi Us (4.8 mi away, 682 ft). Wet days: days with at least 0.01 in of precipitation.
Questions
What is the hottest month in Green Bay?
July, with an average high of 81°F and low of 60°F.
What is the coldest month in Green Bay?
January, with an average low of 11°F and high of 26°F.
When does it rain most in Green Bay?
June is the wettest month, averaging 4.1 in of precipitation; the year totals about 31.8 inches.
Does it snow in Green Bay?
Yes. Snowfall averages about 56 inches a year, mostly in January and December.
What is the best time to visit Green Bay?
For mild weather (highs between 65°F and 85°F) with the least rain, May, August, September.
Where do these numbers come from?
NOAA’s 1991–2020 U.S. Climate Normals for the Green Bay weather station, 4.8 miles from downtown: 30-year averages, not a forecast.