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
64°F
Mostly Clear
Mostly clear, with a low around 64. South southwest wind around 6 mph.
7-day forecast for Green Bay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Mostly Clear | 6 mph SSW | 0% |
| Tuesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 6 to 12 mph SW | 39% |
| Tuesday Night | 64°F | Chance Showers And Thunderstorms | 3 to 7 mph WNW | 61% |
| Wednesday | 78°F | Slight Chance Rain Showers then Partly Sunny | 3 mph NE | 14% |
| Wednesday Night | 59°F | Slight Chance Rain Showers | 3 mph SSE | 6% |
| Thursday | 81°F | Patchy Fog then Sunny | 0 to 5 mph SSW | 3% |
| Thursday Night | 62°F | Mostly Clear | 5 mph SSW | 1% |
| Friday | 85°F | Sunny | 3 to 10 mph SW | 1% |
| Friday Night | 66°F | Mostly Clear | 8 mph SW | 9% |
| Saturday | 86°F | Mostly Sunny | 6 to 9 mph SW | 14% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 3 to 8 mph SSW | 44% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 5 to 8 mph WSW | 44% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 2 to 7 mph W | 44% |
| Monday | 82°F | Chance Showers And Thunderstorms | 2 to 6 mph S | 33% |
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 Aug 4, 2026.