Plymouth, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a town in Box Elder County, Utah.
Overnight
46°F
Mostly Cloudy
Mostly cloudy. Low around 46, with temperatures rising to around 48 overnight. North northwest wind around 2 mph.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Mostly Cloudy | 2 mph NNW | 9% |
| Saturday | 67°F | Mostly Sunny then Scattered Showers And Thunderstorms | 2 to 8 mph NW | 35% |
| Saturday Night | 41°F | Isolated Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph N | 11% |
| Sunday | 72°F | Sunny | 5 mph ESE | 0% |
| Sunday Night | 44°F | Mostly Clear | 3 mph E | 0% |
| Monday | 78°F | Sunny | 5 mph E | 0% |
| Monday Night | 49°F | Partly Cloudy | 3 mph ENE | 0% |
| Tuesday | 77°F | Mostly Sunny | 6 mph E | 4% |
| Tuesday Night | 49°F | Slight Chance Showers And Thunderstorms | 3 mph ESE | 24% |
| Wednesday | 79°F | Mostly Sunny | 1 to 7 mph SSE | 9% |
| Wednesday Night | 48°F | Mostly Clear | 5 mph ESE | 4% |
| Thursday | 82°F | Sunny | 2 to 6 mph SE | 2% |
| Thursday Night | 51°F | Partly Cloudy | 1 to 5 mph ESE | 0% |
| Friday | 83°F | Mostly Sunny | 2 to 9 mph SSE | 5% |
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 Sep 19, 2026.