St. Rosa, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Rosa, a city in Stearns County, Minnesota.
Tonight
52°F
Rain Showers Likely
Rain showers likely and patchy fog before 1am, then a chance of drizzle between 1am and 3am. Cloudy, with a low around 52. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for St. Rosa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Rain Showers Likely | 10 to 15 mph E | 68% |
| Saturday | 64°F | Cloudy | 10 mph NE | 6% |
| Saturday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 2% |
| Sunday | 66°F | Mostly Cloudy | 10 to 15 mph NE | 0% |
| Sunday Night | 46°F | Mostly Cloudy | 5 to 10 mph ENE | 3% |
| Monday | 62°F | Mostly Cloudy | 5 to 10 mph E | 5% |
| Monday Night | 41°F | Partly Cloudy | 0 to 5 mph E | 3% |
| Tuesday | 64°F | Mostly Sunny | 0 to 10 mph ESE | 1% |
| Tuesday Night | 43°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Wednesday | 65°F | Mostly Sunny | 0 to 10 mph SE | 2% |
| Wednesday Night | 47°F | Partly Cloudy then Slight Chance Rain Showers | 0 to 5 mph SSE | 16% |
| Thursday | 68°F | Slight Chance Rain Showers then Partly Sunny | 0 to 10 mph S | 16% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph SSE | 7% |
| Friday | 71°F | Mostly Sunny | 0 to 10 mph SSE | 9% |
Forecast source: National Weather Service (api.weather.gov) for St. Rosa (45.727, -94.714). Updated through the day.
Growing snapshot for St. Rosa
Last spring frost
May 4
First fall frost
Oct 1
Growing season
148 days
Hardiness zone
4b
More local growing data for St. Rosa: nearby ZIP 56331 weather · frost dates · planting calendar · Minnesota frost dates
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Climate data from the nearest NOAA station, Melrose, Mn (6.3 mi from St. Rosa). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.