Alta, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alta, a town in Salt Lake County, Utah.
Today
68°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 68. West wind 5 to 10 mph.
7-day forecast for Alta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Patchy Smoke | 5 to 10 mph W | 0% |
| Tonight | 48°F | Patchy Smoke | 6 to 10 mph NW | 0% |
| Wednesday | 69°F | Patchy Smoke | 6 to 9 mph W | 0% |
| Wednesday Night | 51°F | Patchy Smoke then Partly Cloudy | 5 to 9 mph NE | 0% |
| Thursday | 73°F | Sunny | 5 to 9 mph SW | 0% |
| Thursday Night | 55°F | Mostly Clear | 5 to 10 mph NNE | 0% |
| Friday | 76°F | Sunny | 5 to 8 mph SW | 0% |
| Friday Night | 58°F | Mostly Clear | 5 to 9 mph NNW | 0% |
| Saturday | 76°F | Sunny | 7 mph SW | 1% |
| Saturday Night | 59°F | Mostly Clear | 7 mph ENE | 5% |
| Sunday | 74°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 7 mph SSW | 15% |
| Sunday Night | 57°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 to 9 mph SE | 12% |
| Monday | 71°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 9 mph SW | 22% |
| Monday Night | 54°F | Slight Chance Showers And Thunderstorms | 8 mph SSW | 22% |
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
Draper
Emigration Canyon metro township
Granite
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 Aug 4, 2026.