Plymouth, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a village in Hancock County, Illinois.
Today
55°F
Cloudy
Cloudy, with a high near 55. West southwest wind 13 to 17 mph, with gusts as high as 24 mph.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Cloudy | 13 to 17 mph WSW | 8% |
| Tonight | 46°F | Mostly Cloudy | 12 mph WSW | 9% |
| Thursday | 55°F | Slight Chance Drizzle then Chance Rain Showers | 9 to 14 mph W | 28% |
| Thursday Night | 43°F | Slight Chance Rain Showers | 9 mph NW | 23% |
| Friday | 52°F | Partly Sunny | 7 to 10 mph N | 10% |
| Friday Night | 32°F | Partly Cloudy | 1 to 6 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 1 to 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 3 mph WNW | 1% |
| Sunday | 58°F | Sunny | 3 to 8 mph W | 2% |
| Sunday Night | 35°F | Clear | 3 mph WSW | 0% |
| Monday | 64°F | Sunny | 2 to 8 mph SW | 0% |
| Monday Night | 41°F | Clear | 6 mph WSW | 0% |
| Tuesday | 65°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 41°F | Partly Cloudy | 2 mph NNE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Plymouth (40.292, -90.916). Updated through the day.
Growing snapshot for Plymouth
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
6a
More local growing data for Plymouth: nearby ZIP 62367 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Augusta
Basco
Bentley
Bowen
Carthage
Dallas City
Elvaston
Ferris
Hamilton
La Harpe
Nauvoo
Niota
Pontoosuc
West Point
Climate data from the nearest NOAA station, Bentley, Il (13.4 mi from Plymouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.