Smithfield, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithfield, a city in Cache County, Utah.
Today
88°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 88. West wind 2 to 6 mph.
7-day forecast for Smithfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Patchy Smoke | 2 to 6 mph W | 0% |
| Tonight | 56°F | Areas Of Smoke | 2 to 6 mph NE | 0% |
| Wednesday | 91°F | Areas Of Smoke | 1 to 5 mph WSW | 0% |
| Wednesday Night | 60°F | Patchy Smoke then Mostly Clear | 5 mph SSW | 0% |
| Thursday | 96°F | Sunny | 1 to 5 mph SW | 0% |
| Thursday Night | 63°F | Clear | 3 mph ESE | 0% |
| Friday | 99°F | Sunny | 5 mph SSW | 0% |
| Friday Night | 66°F | Mostly Clear | 5 mph E | 0% |
| Saturday | 98°F | Sunny | 1 to 6 mph NW | 0% |
| Saturday Night | 68°F | Mostly Clear | 3 to 7 mph E | 0% |
| Sunday | 97°F | Mostly Sunny | 2 to 8 mph SW | 3% |
| Sunday Night | 67°F | Mostly Clear | 3 to 7 mph SE | 2% |
| Monday | 95°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 9 mph S | 15% |
| Monday Night | 66°F | Partly Cloudy | 3 to 7 mph SE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Smithfield (41.835, -111.828). Updated through the day.
Growing snapshot for Smithfield
Last spring frost
May 8
First fall frost
Oct 2
Growing season
144 days
Hardiness zone
6a
More local growing data for Smithfield: nearby ZIP 84318 weather · frost dates · planting calendar · Utah frost dates
Nearby towns & communities
Amalga
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Benson
Cache
Clarkston
Cornish
Hyde Park
Hyrum
Lewiston
Logan
Mendon
Millville
Newton
Nibley
North Logan
Paradise
Peter
Providence
Richmond
River Heights
Trenton
Wellsville
Climate data from the nearest NOAA station, Logan Cache Ap, Ut (2.7 mi from Smithfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.