Frost dates across Utah
Typical last spring frost, first fall frost, and USDA zone for 7 Utah cities, from 30-year NOAA climate normals. Every date is a 50 percent odds line, not a promise. Pick a city for the full frost window and what is plantable there now.
Not on the list? Any Utah ZIP works.
| City | Last spring frost | First fall frost | Season length | Zone |
|---|---|---|---|---|
| Salt Lake City | Mar 31 | Nov 8 | about 222 days | 7b |
| West Valley City | Apr 8 | Oct 31 | about 206 days | 7b |
| West Jordan | Apr 18 | Oct 22 | about 187 days | 7b |
| Provo | Apr 18 | Oct 21 | about 186 days | 7a |
| Saint George | Mar 14 | Nov 10 | about 241 days | 8b |
| Logan | Apr 30 | Oct 16 | about 169 days | 6a |
| Vernal | May 7 | Oct 6 | about 152 days | 5b |
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