Summit, UT Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Summit, a community in Iron County, Utah.

Tonight

55°F

Mostly Clear

Mostly clear. Low around 55, with temperatures rising to around 58 overnight. South southwest wind 1 to 14 mph.

7-day forecast for Summit

When	Temp	Forecast	Wind	Precip
Tonight	55°F	Mostly Clear	1 to 14 mph SSW	13%
Saturday	74°F	Sunny	0 to 9 mph W	2%
Saturday Night	53°F	Mostly Clear	2 to 6 mph ESE	0%
Sunday	76°F	Sunny	1 to 8 mph N	0%
Sunday Night	55°F	Partly Cloudy	2 to 6 mph NNE	0%
Monday	77°F	Mostly Sunny	1 to 7 mph S	8%
Monday Night	54°F	Showers And Thunderstorms Likely	7 mph SSE	57%
Tuesday	72°F	Chance Showers And Thunderstorms	7 mph SSE	53%
Tuesday Night	52°F	Slight Chance Showers And Thunderstorms then Partly Cloudy	5 mph SE	17%
Wednesday	75°F	Sunny then Slight Chance Showers And Thunderstorms	5 mph NNE	15%
Wednesday Night	54°F	Mostly Clear	6 mph E	4%
Thursday	76°F	Mostly Sunny then Slight Chance Showers And Thunderstorms	6 mph SSE	16%
Thursday Night	57°F	Slight Chance Showers And Thunderstorms then Partly Cloudy	5 to 8 mph SE	14%
Friday	76°F	Mostly Sunny then Slight Chance Showers And Thunderstorms	7 mph SSE	24%

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

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

All Utah locations ›

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 Sep 19, 2026.