St. George, UT Frost Dates
The last spring frost in St. George usually comes around March 14 and the first fall frost around November 10.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | March 14 | November 10 |
| Hard freeze, 28°F | February 27 | November 20 |
Growing season: about 239 days.
Frequently asked questions
When is the last frost in St. George, UT?
The median date of the last spring frost (32°F) is March 14. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past March 14 lowers the risk for tender plants.
When is the first frost in St. George?
The median date of the first fall frost (32°F) is November 10, and a hard freeze (28°F) usually follows around November 20.
How long is the growing season in St. George?
About 239 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USC00427516. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.