Osseo, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Osseo, a city in Trempealeau County, Wisconsin.
Tonight
51°F
Showers And Thunderstorms
Showers and thunderstorms before 1am, then a chance of showers and thunderstorms between 1am and 3am, then showers and thunderstorms likely. Cloudy, with a low around 51. East wind around 15 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Osseo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Showers And Thunderstorms | 15 mph E | 95% |
| Saturday | 63°F | Showers And Thunderstorms Likely | 9 to 13 mph E | 64% |
| Saturday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 5 to 9 mph NE | 37% |
| Sunday | 68°F | Partly Sunny | 7 to 10 mph NE | 4% |
| Sunday Night | 45°F | Mostly Cloudy | 7 mph E | 2% |
| Monday | 63°F | Mostly Cloudy | 6 to 9 mph E | 8% |
| Monday Night | 41°F | Mostly Cloudy | 6 mph E | 7% |
| Tuesday | 62°F | Mostly Sunny | 7 mph E | 7% |
| Tuesday Night | 41°F | Partly Cloudy | 3 mph E | 4% |
| Wednesday | 65°F | Sunny | 5 mph E | 1% |
| Wednesday Night | 44°F | Partly Cloudy | 2 mph SE | 4% |
| Thursday | 68°F | Mostly Sunny | 3 mph SE | 6% |
| Thursday Night | 47°F | Partly Cloudy | 1 mph E | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov) for Osseo (44.580, -91.214). Updated through the day.
Growing snapshot for Osseo
Last spring frost
May 7
First fall frost
Oct 1
Growing season
146 days
Hardiness zone
4b
More local growing data for Osseo: nearby ZIP 54758 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Augusta Rs, Wi (9.5 mi from Osseo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.