Green Bay, WI Weather & Growing Conditions
Today
85°F
Partly Sunny then Chance Showers And Thunderstorms
A slight chance of rain showers between noon and 1pm, then a chance of showers and thunderstorms. Partly sunny. High near 85, with temperatures falling to around 82 in the afternoon. Heat index values as high as 89. Southwest wind 8 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 8 to 12 mph SW | 26% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 7 mph NW | 58% |
| Wednesday | 79°F | Partly Sunny | 3 mph ENE | 14% |
| Wednesday Night | 59°F | Slight Chance Rain Showers | 0 to 3 mph SSE | 6% |
| Thursday | 83°F | Sunny | 0 to 5 mph SSW | 2% |
| Thursday Night | 62°F | Mostly Clear | 5 mph SSW | 1% |
| Friday | 86°F | Sunny | 3 to 10 mph SW | 1% |
| Friday Night | 67°F | Mostly Clear | 8 mph SW | 9% |
| Saturday | 86°F | Mostly Sunny | 6 to 10 mph SW | 14% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 3 to 8 mph SSW | 44% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 to 9 mph WSW | 44% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 2 to 8 mph W | 44% |
| Monday | 81°F | Chance Showers And Thunderstorms | 6 mph S | 33% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 6 mph NNE | 37% |
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 (2.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.