Oslo, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oslo, a city in Marshall County, Minnesota.
This Afternoon
47°F
Slight Chance Drizzle
A slight chance of drizzle before 5pm. Mostly cloudy. High near 47, with temperatures falling to around 43 in the afternoon. North wind around 20 mph.
7-day forecast for Oslo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 47°F | Slight Chance Drizzle | 20 mph N | 11% |
| Tonight | 35°F | Mostly Cloudy | 13 to 17 mph N | 13% |
| Wednesday | 47°F | Mostly Cloudy | 21 mph N | 1% |
| Wednesday Night | 30°F | Mostly Cloudy | 18 mph N | 0% |
| Thursday | 41°F | Partly Sunny | 7 to 18 mph N | 0% |
| Thursday Night | 23°F | Partly Cloudy | 2 to 6 mph ESE | 0% |
| Friday | 45°F | Mostly Sunny | 3 to 13 mph S | 0% |
| Friday Night | 28°F | Partly Cloudy | 10 mph S | 0% |
| Saturday | 54°F | Mostly Sunny | 10 to 14 mph SW | 10% |
| Saturday Night | 33°F | Partly Cloudy | 10 mph W | 8% |
| Sunday | 52°F | Mostly Sunny | 10 mph SW | 1% |
| Sunday Night | 35°F | Mostly Cloudy | 12 mph S | 0% |
| Monday | 55°F | Mostly Sunny | 13 to 21 mph W | 1% |
| Monday Night | 32°F | Partly Cloudy | 6 to 13 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Oslo (48.196, -97.131). Updated through the day.
Growing snapshot for Oslo
Last spring frost
May 15
First fall frost
Sep 26
Growing season
134 days
Hardiness zone
4a
More local growing data for Oslo: nearby ZIP 56744 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Argyle, Mn (15 mi from Oslo). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.