Plymouth, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a city in Marshall County, Indiana.
This Afternoon
74°F
Mostly Sunny
Mostly sunny, with a high near 74. East wind around 5 mph.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Mostly Sunny | 5 mph E | 8% |
| Tonight | 58°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph E | 35% |
| Saturday | 77°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph SE | 78% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph SW | 86% |
| Sunday | 74°F | Showers And Thunderstorms | 5 to 10 mph N | 81% |
| Sunday Night | 53°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 57% |
| Monday | 66°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 54% |
| Monday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 29% |
| Tuesday | 66°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Tuesday Night | 50°F | Slight Chance Rain Showers | 5 to 10 mph NE | 22% |
| Wednesday | 66°F | Mostly Cloudy | 5 to 10 mph NE | 13% |
| Wednesday Night | 51°F | Mostly Cloudy | 5 to 10 mph NE | 9% |
| Thursday | 70°F | Partly Sunny | 5 mph N | 5% |
| Thursday Night | 51°F | Mostly Cloudy | 0 to 5 mph N | 5% |
Forecast source: National Weather Service (api.weather.gov) for Plymouth (41.349, -86.319). Updated through the day.
Growing snapshot for Plymouth
Last spring frost
Apr 25
First fall frost
Oct 21
Growing season
178 days
Hardiness zone
6a
More local growing data for Plymouth: nearby ZIP 46563 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Argos
Bourbon
Bremen
Culver
Donaldson
Koontz Lake
La Paz
Lake of the Woods
Talma
Teegarden
Tippecanoe
Tyner
Climate data from the nearest NOAA station, Plymouth, In (1.2 mi from Plymouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.