St. George, UT Weather & Growing Conditions
Tonight
65°F
Mostly Clear
Mostly clear. Low around 65, with temperatures rising to around 67 overnight. South wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 65°F | Mostly Clear | 3 mph S | 1% |
| Saturday | 90°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 61°F | Mostly Clear | 1 to 6 mph NE | 0% |
| Sunday | 91°F | Sunny | 1 mph NNE | 0% |
| Sunday Night | 66°F | Partly Cloudy | 2 mph NW | 0% |
| Monday | 91°F | Mostly Sunny | 2 mph ESE | 5% |
| Monday Night | 65°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 1 to 5 mph NNW | 30% |
| Tuesday | 88°F | Chance Showers And Thunderstorms | 2 mph E | 28% |
| Tuesday Night | 63°F | Mostly Clear | 3 mph NNE | 9% |
| Wednesday | 92°F | Sunny | 1 mph E | 7% |
| Wednesday Night | 66°F | Mostly Clear | 1 to 5 mph NE | 4% |
| Thursday | 94°F | Mostly Sunny | 2 mph E | 5% |
| Thursday Night | 68°F | Partly Cloudy | 2 to 7 mph ENE | 11% |
| Friday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 mph ESE | 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 Sep 19, 2026.