Green Bay, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Green Bay, a city in Brown County, Wisconsin.
Overnight
59°F
Rain Showers
Rain showers and areas of fog. Cloudy. Low around 59, with temperatures rising to around 61 overnight. South southeast wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Green Bay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Rain Showers | 9 mph SSE | 89% |
| Wednesday | 64°F | Rain Showers | 8 to 12 mph S | 85% |
| Wednesday Night | 47°F | Chance Rain Showers | 7 to 10 mph SW | 49% |
| Thursday | 54°F | Rain Showers Likely | 7 to 13 mph WNW | 67% |
| Thursday Night | 36°F | Chance Rain Showers | 14 mph N | 31% |
| Friday | 46°F | Chance Rain Showers | 7 to 13 mph N | 27% |
| Friday Night | 31°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Saturday | 49°F | Sunny | 3 mph WNW | 0% |
| Saturday Night | 33°F | Mostly Clear | 2 to 6 mph WSW | 5% |
| Sunday | 54°F | Sunny | 6 to 9 mph W | 8% |
| Sunday Night | 34°F | Mostly Clear | 2 to 6 mph W | 0% |
| Monday | 57°F | Mostly Sunny | 2 to 9 mph WSW | 0% |
| Monday Night | 39°F | Partly Cloudy | 7 mph W | 2% |
| Tuesday | 56°F | Mostly Sunny | 5 to 8 mph WNW | 8% |
Forecast source: National Weather Service (api.weather.gov) for Green Bay (44.522, -87.987). Updated through the day.
Growing snapshot for Green Bay
Last spring frost
May 7
First fall frost
Oct 9
Growing season
154 days
Hardiness zone
5b
More local growing data for Green Bay: nearby ZIP 54302 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Allouez
Ashwaubenon
Bellevue
De Pere
Denmark
Dyckesville
Greenleaf
Hobart
Howard
Suamico
Wrightstown
Climate data from the nearest NOAA station, Green Bay Botanical, Wi (6.3 mi from Green Bay). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.