St. George, UT Weather & Growing Conditions
Overnight
77°F
Mostly Clear
Mostly clear. Low around 77, with temperatures rising to around 80 overnight. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 77°F | Mostly Clear | 5 mph E | 0% |
| Tuesday | 109°F | Sunny | 1 to 12 mph W | 0% |
| Tuesday Night | 77°F | Mostly Clear | 3 to 12 mph ESE | 0% |
| Wednesday | 108°F | Sunny | 2 to 10 mph NW | 0% |
| Wednesday Night | 78°F | Mostly Clear | 3 to 10 mph SSW | 0% |
| Thursday | 108°F | Sunny | 0 to 6 mph S | 1% |
| Thursday Night | 79°F | Mostly Clear | 3 to 7 mph SSE | 2% |
| Friday | 111°F | Sunny | 0 to 3 mph S | 0% |
| Friday Night | 80°F | Mostly Clear | 5 mph SSW | 1% |
| Saturday | 110°F | Sunny | 0 to 7 mph ESE | 0% |
| Saturday Night | 80°F | Mostly Clear | 2 to 7 mph S | 5% |
| Sunday | 108°F | Sunny then Slight Chance Showers And Thunderstorms | 1 to 7 mph SSE | 12% |
| Sunday Night | 79°F | Partly Cloudy | 3 to 9 mph SSW | 5% |
| Monday | 104°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 8 mph S | 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 (5.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.