Plymouth, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a town in Box Elder County, Utah.
This Afternoon
73°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 73, with temperatures falling to around 69 in the afternoon. Southeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Showers And Thunderstorms | 10 mph SE | 82% |
| Tonight | 46°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 2 to 8 mph N | 59% |
| Saturday | 67°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph WNW | 48% |
| Saturday Night | 44°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph N | 12% |
| Sunday | 72°F | Sunny | 5 mph NW | 0% |
| Sunday Night | 47°F | Mostly Clear | 3 mph SE | 0% |
| Monday | 78°F | Sunny | 5 mph ENE | 0% |
| Monday Night | 51°F | Partly Cloudy | 3 mph NNE | 0% |
| Tuesday | 79°F | Partly Sunny | 2 to 6 mph SSE | 3% |
| Tuesday Night | 51°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph SE | 14% |
| Wednesday | 79°F | Sunny | 1 to 6 mph SSE | 4% |
| Wednesday Night | 51°F | Mostly Clear | 1 to 5 mph N | 4% |
| Thursday | 82°F | Sunny | 2 to 6 mph ESE | 2% |
| Thursday Night | 53°F | Partly Cloudy | 1 to 5 mph ESE | 4% |
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.