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
56°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy. Low around 56, with temperatures rising to around 58 overnight. East wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Green Bay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Showers And Thunderstorms Likely | 7 mph E | 74% |
| Saturday | 64°F | Rain Showers | 7 to 10 mph E | 80% |
| Saturday Night | 54°F | Rain Showers Likely then Cloudy | 8 mph NE | 66% |
| Sunday | 66°F | Partly Sunny | 9 to 13 mph NE | 8% |
| Sunday Night | 52°F | Mostly Cloudy | 8 to 13 mph NE | 1% |
| Monday | 61°F | Mostly Cloudy | 8 to 13 mph NE | 4% |
| Monday Night | 48°F | Mostly Cloudy | 6 to 10 mph NE | 4% |
| Tuesday | 62°F | Partly Sunny | 6 to 12 mph ENE | 4% |
| Tuesday Night | 49°F | Partly Cloudy | 3 to 8 mph ENE | 6% |
| Wednesday | 65°F | Mostly Sunny | 3 to 8 mph NE | 6% |
| Wednesday Night | 50°F | Partly Cloudy | 1 to 5 mph NE | 4% |
| Thursday | 69°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 3 mph N | 4% |
| Friday | 71°F | Mostly Sunny | 3 mph N | 4% |
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 19, 2026.