| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F | |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F | |
| Average First Frost Date: | Jan. 11 - Jan. 20 | |
| Average Last Frost Date: | Jan. 21 - Jan. 31 | |
| Koppen-Geiger Climate Zone: | BWh - Hot 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 89005 - Boulder City, NV | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 43 | 47 | 54 | 62 | 71 | 77 | 76 | 69 | 58 | 46 | 38 | 57 |
| Avg Max Temp (°F) | 57 | 63 | 70 | 79 | 88 | 98 | 104 | 102 | 94 | 81 | 66 | 57 | 80 |
| Avg Precip (In.) | .68 | .75 | .9 | .23 | .23 | .11 | .52 | .81 | .59 | .3 | .49 | .46 | 6.07 |