Plymouth, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a town in Box Elder County, Utah.
Overnight
36°F
Cloudy
Cloudy. Low around 36, with temperatures rising to around 38 overnight. North wind around 3 mph.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 36°F | Cloudy | 3 mph N | 2% |
| Wednesday | 55°F | Mostly Cloudy | 6 mph NNW | 5% |
| Wednesday Night | 33°F | Patchy Fog | 1 to 5 mph NNW | 3% |
| Thursday | 52°F | Patchy Fog then Partly Sunny | 1 to 5 mph NNW | 11% |
| Thursday Night | 32°F | Partly Cloudy | 3 mph NW | 11% |
| Friday | 53°F | Sunny | 3 mph WNW | 0% |
| Friday Night | 32°F | Partly Cloudy | 2 mph E | 0% |
| Saturday | 56°F | Sunny | 2 mph SE | 0% |
| Saturday Night | 35°F | Mostly Clear | 1 mph ESE | 0% |
| Sunday | 59°F | Sunny | 0 to 6 mph SSE | 0% |
| Sunday Night | 37°F | Partly Cloudy | 2 mph NNE | 0% |
| Monday | 60°F | Mostly Sunny | 3 mph SE | 0% |
| Monday Night | 38°F | Mostly Cloudy | 2 mph ENE | 0% |
| Tuesday | 59°F | Mostly Sunny | 0 to 3 mph SE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Plymouth (41.874, -112.147). Updated through the day.
Growing snapshot for Plymouth
Last spring frost
May 3
First fall frost
Oct 12
Growing season
160 days
Hardiness zone
6a
More local growing data for Plymouth: nearby ZIP 84330 weather · frost dates · planting calendar · Utah frost dates
Nearby towns & communities
Bear River City
Brigham City
Corinne
Deweyville
Elwood
Fielding
Garland
Honeyville
Howell
Mantua
Perry
Portage
Riverside
Snowville
Thatcher
Tremonton
Climate data from the nearest NOAA station, Cutler Dam, Ut (7.7 mi from Plymouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.