Alton, UT Weather & Growing Conditions
This Afternoon
48°F
Mostly Sunny
Mostly sunny. High near 48, with temperatures falling to around 45 in the afternoon. South southeast wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Mostly Sunny | 2 to 6 mph SSE | 1% |
| Tonight | 28°F | Mostly Clear then Patchy Fog | 2 mph SSE | 5% |
| Wednesday | 48°F | Patchy Fog then Sunny | 1 to 7 mph WNW | 5% |
| Wednesday Night | 26°F | Mostly Clear | 2 to 9 mph N | 0% |
| Thursday | 49°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Thursday Night | 28°F | Mostly Clear | 0 to 8 mph N | 0% |
| Friday | 52°F | Sunny | 0 to 12 mph NNE | 0% |
| Friday Night | 30°F | Mostly Clear | 0 to 8 mph N | 0% |
| Saturday | 55°F | Sunny | 0 to 9 mph NE | 0% |
| Saturday Night | 31°F | Clear | 1 mph NNE | 0% |
| Sunday | 56°F | Sunny | 0 to 5 mph ESE | 1% |
| Sunday Night | 33°F | Mostly Clear | 0 mph | 1% |
| Monday | 56°F | Mostly Sunny | 0 to 3 mph SSE | 5% |
| Monday Night | 34°F | Partly Cloudy | 1 mph WNW | 2% |
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 Nov 4, 2026.