St. George, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. George, a city in Washington County, Utah.
This Afternoon
64°F
Sunny
Sunny. High near 64, with temperatures falling to around 62 in the afternoon. West northwest wind 3 to 7 mph.
7-day forecast for St. George
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Sunny | 3 to 7 mph WNW | 1% |
| Tonight | 42°F | Mostly Clear | 3 mph NE | 0% |
| Thursday | 63°F | Partly Sunny | 1 mph NNE | 0% |
| Thursday Night | 43°F | Partly Cloudy | 2 mph NNE | 0% |
| Friday | 64°F | Sunny | 1 mph NE | 0% |
| Friday Night | 42°F | Mostly Clear | 1 to 6 mph NNE | 0% |
| Saturday | 65°F | Sunny | 1 mph NNE | 0% |
| Saturday Night | 45°F | Clear | 2 mph NE | 0% |
| Sunday | 67°F | Sunny | 2 mph ENE | 0% |
| Sunday Night | 46°F | Mostly Clear | 2 mph ENE | 0% |
| Monday | 67°F | Mostly Sunny | 2 mph E | 0% |
| Monday Night | 49°F | Partly Cloudy | 0 mph | 0% |
| Tuesday | 67°F | Mostly Sunny | 0 mph | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 1 mph NNE | 1% |
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
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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.