Osseo, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Osseo, a city in Trempealeau County, Wisconsin.
Overnight
65°F
Mostly Cloudy
Mostly cloudy. Low around 65, with temperatures rising to around 68 overnight. South wind around 9 mph, with gusts as high as 20 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Osseo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Mostly Cloudy | 9 mph S | 10% |
| Tuesday | 79°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 9 mph W | 38% |
| Tuesday Night | 56°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 7 mph NW | 24% |
| Wednesday | 79°F | Mostly Sunny | 2 to 6 mph NW | 1% |
| Wednesday Night | 54°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Thursday | 84°F | Sunny | 0 to 8 mph S | 1% |
| Thursday Night | 60°F | Mostly Clear | 3 to 7 mph SW | 1% |
| Friday | 86°F | Sunny | 3 to 10 mph SW | 8% |
| Friday Night | 63°F | Chance Rain Showers | 3 to 10 mph SW | 26% |
| Saturday | 86°F | Slight Chance Rain Showers | 3 to 8 mph SW | 18% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 39% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 38% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 2 to 7 mph E | 30% |
| Monday | 83°F | Chance Rain Showers | 3 to 8 mph S | 29% |
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 Aug 4, 2026.