St. George, UT Weather & Growing Conditions
Overnight
64°F
Mostly Clear
Mostly clear. Low around 64, with temperatures rising to around 66 overnight. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Mostly Clear | 0 mph | 0% |
| Saturday | 91°F | Sunny | 1 to 5 mph W | 0% |
| Saturday Night | 61°F | Mostly Clear | 2 to 6 mph NW | 0% |
| Sunday | 92°F | Mostly Sunny | 2 mph NNE | 0% |
| Sunday Night | 66°F | Partly Cloudy | 3 mph N | 0% |
| Monday | 91°F | Mostly Sunny | 2 mph E | 3% |
| Monday Night | 65°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph WNW | 37% |
| Tuesday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 3 mph E | 35% |
| Tuesday Night | 63°F | Mostly Clear | 3 mph NNE | 8% |
| Wednesday | 92°F | Sunny | 1 mph E | 3% |
| Wednesday Night | 66°F | Mostly Clear | 3 mph NNE | 4% |
| Thursday | 94°F | Sunny | 3 mph ESE | 3% |
| Thursday Night | 68°F | Partly Cloudy | 2 to 8 mph E | 11% |
| Friday | 93°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph SE | 19% |
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 Sep 19, 2026.