Utah planting zones & frost dates
The 11 Utah cities on this site fall in zones 6b, 7a, 7b, 8b. Last spring frost dates range from Mar 25 in St. George to May 8 in Sandy.
| City | Zone | Last frost | First frost | Population |
|---|---|---|---|---|
| Salt Lake City | 7b | Apr 16 | Oct 25 | 217,783 |
| West Valley City | 7b | Apr 16 | Oct 25 | 138,144 |
| West Jordan | 7b | Apr 25 | Oct 16 | 116,688 |
| Provo | 6b | Apr 25 | Oct 16 | 115,479 |
| St. George | 8b | Mar 25 | Nov 5 | 106,288 |
| Orem | 7a | Apr 26 | Oct 13 | 96,646 |
| Lehi | 7a | May 8 | Oct 2 | 93,446 |
| Sandy | 7b | May 8 | Oct 16 | 92,840 |
| Ogden | 7a | Apr 28 | Oct 17 | 88,656 |
| South Jordan | 7a | Apr 25 | Oct 16 | 86,156 |
| Layton | 7a | Apr 27 | Oct 13 | 84,348 |
Frost dates are 30%-risk dates from the nearest suitable NOAA station. Population: Census Vintage 2024 estimates.