Ortonville, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ortonville, a city in Big Stone County, Minnesota.
Today
70°F
Mostly Sunny
Mostly sunny, with a high near 70. Northwest wind 6 to 10 mph.
7-day forecast for Ortonville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Mostly Sunny | 6 to 10 mph NW | 0% |
| Tonight | 52°F | Mostly Clear | 5 mph SW | 0% |
| Wednesday | 75°F | Sunny | 3 to 9 mph SSW | 0% |
| Wednesday Night | 59°F | Partly Cloudy | 3 to 12 mph SSW | 2% |
| Thursday | 79°F | Sunny | 9 to 13 mph SW | 2% |
| Thursday Night | 61°F | Mostly Clear | 8 mph SSW | 6% |
| Friday | 81°F | Sunny | 6 to 9 mph SSW | 9% |
| Friday Night | 60°F | Mostly Clear | 2 to 6 mph SSE | 9% |
| Saturday | 80°F | Sunny | 2 to 10 mph SE | 11% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 5 to 8 mph E | 27% |
| Sunday | 79°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 to 8 mph NE | 26% |
| Sunday Night | 61°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 6 mph ENE | 24% |
| Monday | 76°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph NE | 24% |
| Monday Night | 60°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph NE | 16% |
Forecast source: National Weather Service (api.weather.gov) for Ortonville (45.302, -96.442). Updated through the day.
Growing snapshot for Ortonville
Last spring frost
May 1
First fall frost
Oct 8
Growing season
159 days
Hardiness zone
4b
More local growing data for Ortonville: nearby ZIP 56278 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Artichoke Lake 1 E, Mn (12.6 mi from Ortonville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.