Summit, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Summit, a community in Iron County, Utah.
Today
51°F
Mostly Sunny
Mostly sunny. High near 51, with temperatures falling to around 49 in the afternoon. East southeast wind around 3 mph.
7-day forecast for Summit
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 51°F | Mostly Sunny | 3 mph ESE | 0% |
| Tonight | 36°F | Mostly Clear then Slight Chance Rain And Snow | 2 to 6 mph SSE | 18% |
| Wednesday | 46°F | Slight Chance Rain And Snow then Sunny | 2 to 7 mph WNW | 18% |
| Wednesday Night | 32°F | Mostly Clear | 0 to 7 mph ENE | 0% |
| Thursday | 50°F | Mostly Sunny | 0 to 3 mph N | 0% |
| Thursday Night | 35°F | Mostly Clear | 2 mph NE | 0% |
| Friday | 52°F | Sunny | 1 to 7 mph NNE | 0% |
| Friday Night | 35°F | Mostly Clear | 6 mph NE | 0% |
| Saturday | 55°F | Sunny | 0 to 3 mph NNE | 0% |
| Saturday Night | 39°F | Clear | 0 to 3 mph E | 0% |
| Sunday | 60°F | Sunny | 0 to 3 mph S | 0% |
| Sunday Night | 43°F | Mostly Clear | 2 mph E | 0% |
| Monday | 59°F | Mostly Sunny | 2 mph S | 4% |
| Monday Night | 44°F | Partly Cloudy | 2 mph ESE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Summit (37.805, -112.933). Updated through the day.
Growing snapshot for Summit
Last spring frost
Jun 21
First fall frost
Sep 12
Growing season
82 days
Hardiness zone
6b
More local growing data for Summit: nearby ZIP 84772 weather · frost dates · planting calendar · Utah frost dates
Nearby towns & communities
Beryl Junction
Brian Head
Cedar City
Cedar Highlands
Enoch
Kanarraville
Modena
Newcastle
Paragonah
Parowan
Climate data from the nearest NOAA station, Brian Head, Ut (8.8 mi from Summit). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.