Winthrop, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winthrop, a city in Sibley County, Minnesota.
Overnight
61°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy. Low around 61, with temperatures rising to around 64 overnight. North northwest wind around 15 mph. Chance of precipitation is 40%.
7-day forecast for Winthrop
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Chance Showers And Thunderstorms | 15 mph NNW | 36% |
| Tuesday | 71°F | Partly Sunny | 10 mph NW | 12% |
| Tuesday Night | 52°F | Partly Cloudy | 0 to 10 mph WNW | 4% |
| Wednesday | 74°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 56°F | Mostly Clear | 5 mph S | 0% |
| Thursday | 79°F | Sunny | 5 to 15 mph SSW | 1% |
| Thursday Night | 62°F | Mostly Clear | 10 mph S | 3% |
| Friday | 82°F | Sunny | 5 to 10 mph SSW | 9% |
| Friday Night | 63°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 15% |
| Saturday | 81°F | Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms | 5 to 10 mph ENE | 39% |
| Sunday | 80°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 39% |
| Sunday Night | 64°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph NE | 23% |
| Monday | 79°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph ENE | 23% |
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 Aug 4, 2026.