St. George, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. George, a city in Washington County, Utah.
Today
91°F
Sunny
Sunny, with a high near 91. North northeast wind 1 to 6 mph.
7-day forecast for St. George
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Sunny | 1 to 6 mph NNE | 0% |
| Tonight | 63°F | Mostly Clear | 2 to 7 mph NE | 0% |
| Sunday | 92°F | Mostly Sunny | 1 mph N | 0% |
| Sunday Night | 67°F | Partly Cloudy | 2 mph NNW | 0% |
| Monday | 92°F | Mostly Sunny | 2 mph ESE | 3% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 mph E | 34% |
| Tuesday | 89°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 3 mph E | 35% |
| Tuesday Night | 64°F | Mostly Clear | 3 mph NNE | 8% |
| Wednesday | 92°F | Sunny | 1 mph E | 3% |
| Wednesday Night | 68°F | Mostly Clear | 3 mph N | 4% |
| Thursday | 95°F | Sunny | 2 mph E | 3% |
| Thursday Night | 69°F | Partly Cloudy | 2 to 6 mph E | 11% |
| Friday | 93°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 mph SE | 20% |
| Friday Night | 69°F | Mostly Clear | 5 mph ESE | 11% |
Forecast source: National Weather Service (api.weather.gov) for St. George (37.077, -113.577). Updated through the day.
Growing snapshot for St. George
Last spring frost
Mar 14
First fall frost
Nov 10
Growing season
239 days
Hardiness zone
8b
More local growing data for St. George: nearby ZIP 84790 weather · frost dates · planting calendar · Utah frost dates
Nearby towns & communities
Apple Valley
Central
Dammeron Valley
Enterprise
Hildale
Hurricane
Ivins
La Verkin
Leeds
New Harmony
Pine Valley
Rockville
Santa Clara
Springdale
Toquerville
Veyo
Virgin
Washington
Climate data from the nearest NOAA station, St George, Ut (5.7 mi from St. George). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.