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
64°F
Sunny
Sunny. High near 64, with temperatures falling to around 62 in the afternoon. West wind 0 to 5 mph.
7-day forecast for St. George
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Sunny | 0 to 5 mph W | 1% |
| Tonight | 43°F | Mostly Clear | 3 mph N | 1% |
| Thursday | 62°F | Partly Sunny | 1 mph NE | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph NNE | 0% |
| Friday | 64°F | Sunny | 1 mph NE | 0% |
| Friday Night | 44°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Saturday | 66°F | Sunny | 1 mph NNE | 0% |
| Saturday Night | 45°F | Clear | 0 to 3 mph NE | 0% |
| Sunday | 68°F | Sunny | 0 to 3 mph ENE | 0% |
| Sunday Night | 48°F | Mostly Clear | 0 to 3 mph NE | 0% |
| Monday | 68°F | Mostly Sunny | 0 to 3 mph ENE | 0% |
| Monday Night | 49°F | Partly Cloudy | 1 mph ENE | 0% |
| Tuesday | 68°F | Mostly Sunny | 1 mph NE | 1% |
| Tuesday Night | 49°F | Mostly Clear | 1 mph NE | 3% |
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 Nov 4, 2026.