Green Bay, WI Weather & Growing Conditions
Today
84°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Partly sunny. High near 84, with temperatures falling to around 81 in the afternoon. Heat index values as high as 88. Southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 10 to 14 mph SW | 45% |
| Tonight | 63°F | Chance Showers And Thunderstorms | 5 to 9 mph WSW | 45% |
| Wednesday | 78°F | Chance Showers And Thunderstorms then Partly Sunny | 5 mph N | 28% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 7 mph SSE | 0% |
| Thursday | 81°F | Mostly Sunny | 2 to 8 mph SSW | 0% |
| Thursday Night | 60°F | Mostly Clear | 5 to 8 mph S | 0% |
| Friday | 84°F | Sunny | 5 to 13 mph SSW | 3% |
| Friday Night | 65°F | Mostly Clear | 12 mph SW | 9% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 8 to 12 mph SW | 15% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 to 12 mph SSW | 44% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 7 to 10 mph WSW | 44% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 5 to 9 mph W | 45% |
| Monday | 81°F | Chance Showers And Thunderstorms | 7 mph SW | 32% |
| Monday Night | 63°F | Chance Showers And Thunderstorms | 7 mph NNE | 38% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Green Bay, WI
Last spring frost
May 7
First fall frost
Oct 9
Growing season
154 days
Hardiness zone
5b
Explore more for Green Bay, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Green Bay Botanical, Wi (14 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.