Green Bay, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Green Bay, a city in Brown County, Wisconsin.
Tonight
56°F
Rain Showers
Rain showers before 1am. Cloudy, with a low around 56. Northeast wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Green Bay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Rain Showers | 9 mph NE | 75% |
| Sunday | 65°F | Partly Sunny | 9 to 14 mph NNE | 2% |
| Sunday Night | 51°F | Mostly Cloudy | 7 to 13 mph NE | 1% |
| Monday | 60°F | Mostly Cloudy | 7 to 12 mph ENE | 0% |
| Monday Night | 46°F | Mostly Cloudy | 6 to 10 mph NE | 1% |
| Tuesday | 61°F | Partly Sunny | 6 to 12 mph ENE | 3% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 8 mph ENE | 3% |
| Wednesday | 64°F | Mostly Sunny | 5 to 9 mph ENE | 5% |
| Wednesday Night | 50°F | Partly Cloudy | 2 to 6 mph NE | 4% |
| Thursday | 67°F | Mostly Sunny | 2 to 6 mph ENE | 4% |
| Thursday Night | 52°F | Mostly Cloudy | 0 to 3 mph NE | 4% |
| Friday | 70°F | Partly Sunny | 3 mph NE | 3% |
| Friday Night | 52°F | Partly Cloudy | 2 mph NE | 1% |
| Saturday | 72°F | Mostly Sunny | 0 to 3 mph ENE | 3% |
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 Sep 20, 2026.