| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Nov. 11 - Nov. 20 | |
| Average Last Frost Date: | Mar. 1 - Mar. 10 | |
| Koppen-Geiger Climate Zone: | BWk - Cold Desert Climate | |
| Ecoregion: | 14a - Creosote Bush-Dominated Basins | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 84790 - Saint George, UT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 29 | 33 | 39 | 46 | 55 | 63 | 70 | 68 | 59 | 47 | 35 | 29 | 48 |
| Avg Max Temp (°F) | 55 | 61 | 69 | 77 | 87 | 98 | 103 | 100 | 93 | 81 | 64 | 55 | 79 |
| Avg Precip (In.) | 1.21 | .99 | 1.07 | .54 | .35 | .22 | .55 | .69 | .61 | .7 | .64 | .54 | 8.11 |