Grantsville, UT Weather & Growing Conditions
Tonight
35°F
Mostly Cloudy then Slight Chance Rain And Snow
A slight chance of rain and snow after 5am. Mostly cloudy, with a low around 35. South wind around 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 35°F | Mostly Cloudy then Slight Chance Rain And Snow | 5 mph S | 24% |
| Wednesday | 43°F | Slight Chance Rain And Snow then Partly Sunny | 3 to 7 mph WNW | 24% |
| Wednesday Night | 33°F | Mostly Clear | 6 mph S | 1% |
| Thursday | 44°F | Partly Sunny | 5 mph WSW | 6% |
| Thursday Night | 32°F | Partly Cloudy | 3 mph NE | 0% |
| Friday | 45°F | Sunny | 5 mph NNE | 0% |
| Friday Night | 32°F | Mostly Clear | 3 mph E | 0% |
| Saturday | 47°F | Sunny | 3 mph SW | 0% |
| Saturday Night | 34°F | Mostly Clear | 2 to 6 mph E | 0% |
| Sunday | 52°F | Sunny | 1 to 7 mph SSW | 0% |
| Sunday Night | 38°F | Partly Cloudy | 1 to 5 mph SSE | 0% |
| Monday | 52°F | Mostly Sunny | 5 mph SSW | 0% |
| Monday Night | 39°F | Mostly Cloudy | 5 mph SSE | 1% |
| Tuesday | 52°F | Mostly Sunny | 5 mph WSW | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grantsville, UT
Last spring frost
May 2
First fall frost
Oct 14
Growing season
164 days
Hardiness zone
7a
Explore more for Grantsville, UT: full frost dates · planting calendar · Utah frost dates
Climate data from the nearest NOAA station, Grantsville 2W, Ut (23.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.