Alta, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alta, a town in Salt Lake County, Utah.
Today
35°F
Mostly Sunny
Mostly sunny. High near 35, with temperatures falling to around 31 in the afternoon. South wind 3 to 7 mph.
7-day forecast for Alta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 35°F | Mostly Sunny | 3 to 7 mph S | 0% |
| Tonight | 26°F | Mostly Cloudy then Chance Light Snow | 2 to 7 mph S | 30% |
| Wednesday | 28°F | Light Snow Likely | 5 mph W | 61% |
| Wednesday Night | 21°F | Mostly Cloudy | 3 mph WSW | 12% |
| Thursday | 32°F | Partly Sunny | 0 to 3 mph WSW | 6% |
| Thursday Night | 22°F | Mostly Cloudy | 3 mph W | 6% |
| Friday | 32°F | Mostly Sunny | 3 mph WNW | 4% |
| Friday Night | 23°F | Partly Cloudy | 5 mph NNW | 3% |
| Saturday | 36°F | Sunny | 2 mph NNW | 0% |
| Saturday Night | 27°F | Mostly Clear | 0 to 3 mph SSW | 0% |
| Sunday | 42°F | Sunny | 3 mph SW | 0% |
| Sunday Night | 31°F | Partly Cloudy | 1 to 7 mph S | 0% |
| Monday | 42°F | Mostly Sunny | 2 to 6 mph WSW | 1% |
| Monday Night | 32°F | Mostly Cloudy | 2 to 6 mph NW | 3% |
Forecast source: National Weather Service (api.weather.gov) for Alta (40.582, -111.620). Updated through the day.
Growing snapshot for Alta
Last spring frost
Jun 11
First fall frost
Sep 18
Growing season
98 days
Hardiness zone
6a
More local growing data for Alta: nearby ZIP 84121 weather · frost dates · planting calendar · Utah frost dates
Nearby towns & communities
Bluffdale
Brighton
Copperton metro township
Cottonwood Heights
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Emigration Canyon metro township
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Herriman
Holladay
Kearns metro township
Magna metro township
Midvale
Millcreek
Murray
Riverton
Salt Lake City
Sandy
South Jordan
South Salt Lake
Taylorsville
West Jordan
West Valley City
White City metro township
Climate data from the nearest NOAA station, Alta, Ut (3.2 mi from Alta). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.