Winthrop, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winthrop, a city in Sibley County, Minnesota.
This Afternoon
65°F
Mostly Cloudy
Mostly cloudy, with a high near 65. East northeast wind 10 to 15 mph.
7-day forecast for Winthrop
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Mostly Cloudy | 10 to 15 mph ENE | 0% |
| Tonight | 48°F | Cloudy | 10 mph ENE | 8% |
| Monday | 57°F | Slight Chance Rain Showers | 5 to 10 mph ENE | 21% |
| Monday Night | 43°F | Partly Cloudy | 0 to 5 mph ENE | 7% |
| Tuesday | 63°F | Sunny | 5 to 10 mph E | 0% |
| Tuesday Night | 42°F | Mostly Clear | 5 mph ESE | 0% |
| Wednesday | 66°F | Sunny | 5 to 10 mph SE | 0% |
| Wednesday Night | 47°F | Mostly Cloudy then Chance Rain Showers | 5 mph SE | 25% |
| Thursday | 66°F | Chance Rain Showers | 10 mph SSE | 45% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph SSE | 10% |
| Friday | 69°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph SSE | 16% |
| Friday Night | 54°F | Chance Rain Showers | 5 to 10 mph SE | 26% |
| Saturday | 70°F | Chance Rain Showers | 10 to 15 mph SSE | 28% |
| Saturday Night | 55°F | Chance Rain Showers | 5 to 10 mph SSE | 41% |
Forecast source: National Weather Service (api.weather.gov) for Winthrop (44.542, -94.360). Updated through the day.
Growing snapshot for Winthrop
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
170 days
Hardiness zone
4b
More local growing data for Winthrop: nearby ZIP 55396 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Gaylord, Mn (7.2 mi from Winthrop). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.