St. George, UT Weather & Growing Conditions
Overnight
78°F
Clear
Clear. Low around 78, with temperatures rising to around 80 overnight. East northeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 78°F | Clear | 1 mph ENE | 0% |
| Tuesday | 109°F | Sunny | 0 to 9 mph WSW | 0% |
| Tuesday Night | 77°F | Mostly Clear | 2 to 9 mph NW | 0% |
| Wednesday | 108°F | Sunny | 1 to 8 mph W | 0% |
| Wednesday Night | 79°F | Mostly Clear | 2 to 8 mph WNW | 0% |
| Thursday | 108°F | Sunny | 0 to 5 mph NW | 1% |
| Thursday Night | 79°F | Mostly Clear | 2 to 6 mph ESE | 2% |
| Friday | 111°F | Sunny | 0 to 3 mph W | 0% |
| Friday Night | 80°F | Mostly Clear | 1 to 5 mph ESE | 2% |
| Saturday | 110°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 81°F | Mostly Clear | 1 to 6 mph SSE | 4% |
| Sunday | 107°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 6 mph WSW | 15% |
| Sunday Night | 80°F | Partly Cloudy | 1 to 8 mph SSW | 5% |
| Monday | 103°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 7 mph SW | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. George, UT
Last spring frost
Mar 14
First fall frost
Nov 10
Growing season
239 days
Hardiness zone
8b
Explore more for St. George, UT: full frost dates · planting calendar · Utah frost dates
Climate data from the nearest NOAA station, St George, Ut (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.