Alta, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alta, a town in Salt Lake County, Utah.
This Afternoon
53°F
Scattered Showers And Thunderstorms
Scattered showers and thunderstorms before 3pm, then showers and thunderstorms. Mostly cloudy. High near 53, with temperatures falling to around 50 in the afternoon. South southwest wind around 8 mph. Chance of precipitation is 80%.
7-day forecast for Alta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 53°F | Scattered Showers And Thunderstorms | 8 mph SSW | 82% |
| Tonight | 39°F | Showers And Thunderstorms | 2 to 6 mph SW | 81% |
| Saturday | 48°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 2 to 7 mph W | 25% |
| Saturday Night | 35°F | Partly Cloudy | 6 mph WNW | 0% |
| Sunday | 52°F | Sunny | 5 mph W | 0% |
| Sunday Night | 38°F | Partly Cloudy | 5 mph NE | 0% |
| Monday | 57°F | Mostly Sunny | 1 to 5 mph S | 0% |
| Monday Night | 44°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph NE | 17% |
| Tuesday | 54°F | Chance Rain Showers | 5 mph S | 54% |
| Tuesday Night | 41°F | Chance Showers And Thunderstorms | 5 mph SSE | 43% |
| Wednesday | 56°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph SSW | 19% |
| Wednesday Night | 42°F | Mostly Clear | 5 mph NE | 6% |
| Thursday | 58°F | Mostly Sunny | 5 mph S | 8% |
| Thursday Night | 44°F | Partly Cloudy | 2 to 6 mph E | 10% |
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
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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 Sep 18, 2026.