Alton, UT Weather & Growing Conditions
Overnight
55°F
Mostly Clear
Mostly clear. Low around 55, with temperatures rising to around 58 overnight. South southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Mostly Clear | 2 mph SSW | 0% |
| Tuesday | 89°F | Sunny | 2 to 10 mph SSW | 0% |
| Tuesday Night | 56°F | Mostly Clear | 1 to 9 mph WSW | 0% |
| Wednesday | 89°F | Sunny | 2 to 8 mph W | 0% |
| Wednesday Night | 55°F | Mostly Clear | 0 to 7 mph W | 0% |
| Thursday | 88°F | Sunny then Scattered Showers And Thunderstorms | 5 mph W | 26% |
| Thursday Night | 55°F | Mostly Clear | 3 mph NW | 0% |
| Friday | 88°F | Sunny | 1 to 5 mph WSW | 8% |
| Friday Night | 56°F | Partly Cloudy | 1 to 5 mph WNW | 1% |
| Saturday | 88°F | Sunny then Slight Chance Showers And Thunderstorms | 5 mph WNW | 16% |
| Saturday Night | 56°F | Partly Cloudy | 1 to 5 mph NW | 9% |
| Sunday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 6 mph W | 32% |
| Sunday Night | 55°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph W | 15% |
| Monday | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph WSW | 43% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Alton, UT
Last spring frost
Jun 1
First fall frost
Sep 30
Growing season
120 days
Hardiness zone
6a
Explore more for Alton, UT: full frost dates · planting calendar · Utah frost dates
Climate data from the nearest NOAA station, Alton, Ut (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.