Plymouth, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a city in Hennepin County, Minnesota.
This Afternoon
58°F
Light Rain
Rain before 2pm, then rain and patchy fog. Cloudy. High near 58, with temperatures falling to around 55 in the afternoon. North wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Light Rain | 10 mph N | 100% |
| Tonight | 50°F | Rain | 10 mph N | 98% |
| Wednesday | 55°F | Rain | 5 to 10 mph N | 95% |
| Wednesday Night | 45°F | Light Rain | 10 to 15 mph NNW | 94% |
| Thursday | 48°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 29% |
| Thursday Night | 36°F | Mostly Cloudy | 5 to 10 mph NNE | 1% |
| Friday | 45°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Friday Night | 32°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph SW | 1% |
| Saturday Night | 38°F | Partly Cloudy | 5 mph W | 9% |
| Sunday | 55°F | Mostly Sunny | 5 to 10 mph W | 6% |
| Sunday Night | 39°F | Partly Cloudy | 5 mph SW | 0% |
| Monday | 57°F | Mostly Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 to 10 mph WNW | 1% |
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 Nov 3, 2026.