Seymour, WI Weather & Growing Conditions
Today
83°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Partly sunny. High near 83, with temperatures falling to around 80 in the afternoon. Heat index values as high as 87. West southwest wind 9 to 13 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 | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 9 to 13 mph WSW | 34% |
| Tonight | 62°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 40% |
| Wednesday | 79°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 3 mph NNW | 20% |
| Wednesday Night | 55°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 82°F | Mostly Sunny | 1 to 5 mph WSW | 0% |
| Thursday Night | 59°F | Mostly Clear | 5 mph SSW | 0% |
| Friday | 84°F | Sunny | 3 to 13 mph SW | 3% |
| Friday Night | 65°F | Mostly Clear | 7 to 12 mph SW | 12% |
| Saturday | 85°F | Mostly Sunny | 6 to 10 mph SW | 12% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 5 to 8 mph SSW | 42% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 42% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 3 to 8 mph WNW | 43% |
| Monday | 82°F | Chance Showers And Thunderstorms | 6 mph SSE | 33% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 6 mph NNW | 37% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Seymour, WI
Last spring frost
May 1
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
5a
Explore more for Seymour, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Green Bay Wfo, Wi (10.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.