Plymouth, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a city in Hennepin County, Minnesota.
Today
75°F
Mostly Sunny then Patchy Smoke
Patchy smoke after 5pm. Mostly sunny, with a high near 75. West northwest wind 5 to 10 mph.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Mostly Sunny then Patchy Smoke | 5 to 10 mph WNW | 2% |
| Tonight | 57°F | Partly Cloudy | 5 to 10 mph WNW | 2% |
| Wednesday | 77°F | Sunny | 0 to 10 mph WSW | 0% |
| Wednesday Night | 60°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Thursday | 82°F | Sunny | 5 to 15 mph SSW | 0% |
| Thursday Night | 65°F | Mostly Clear | 10 mph SSW | 3% |
| Friday | 85°F | Sunny | 10 mph SSW | 10% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 23% |
| Saturday | 84°F | Sunny | 5 to 10 mph SSW | 14% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph WNW | 51% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 51% |
| Sunday Night | 66°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph NNE | 17% |
| Monday | 82°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 21% |
| Monday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 23% |
Forecast source: National Weather Service (api.weather.gov) for Plymouth (45.022, -93.463). Updated through the day.
Growing snapshot for Plymouth
Last spring frost
Apr 29
First fall frost
Oct 12
Growing season
163 days
Hardiness zone
5a
More local growing data for Plymouth: nearby ZIP 55446 weather · frost dates · planting calendar · Minnesota frost dates
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Climate data from the nearest NOAA station, New Hope, Mn (5.8 mi from Plymouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.