Nevada Plant Hardiness Zones
Nevada’s towns run from zone 5a to zone 10a: the average coldest winter night is 31.8°F at Laughlin and -16.8°F at Wells.
Hardiness zones in Nevada
In USDA’s colors, neighboring states washed out. Zones follow elevation, coasts and cities down to half a mile. Drawn by WeatherOverTime from the USDA-ARS and Oregon State University PRISM Climate Group 2023 GIS data; this is not the official USDA Plant Hardiness Zone Map.
- 4b
- 5a
- 5b
- 6a
- 6b
- 7a
- 7b
- 8a
- 8b
- 9a
- 9b
- 10a
Towns by zone
Each town’s 1991-2020 average annual extreme minimum at its center, read from the map’s 800 m grid. Warmest zone first.
10a Zone 10a, 30 to 35°F 1 towns
9b Zone 9b, 25 to 30°F 8 towns
- Boulder City26.4°F
- Henderson27.4°F
- Las Vegas26°F
- North Las Vegas26.2°F
- Paradise26.2°F
- Sunrise Manor25.6°F
- Whitney26.8°F
- Winchester26.4°F
9a Zone 9a, 20 to 25°F 10 towns
- Bunkerville20°F
- Enterprise23.5°F
- Mesquite20°F
- Moapa Town21.6°F
- Moapa Valley21.2°F
- Nellis Air Force Base24.8°F
- Sandy Valley20.1°F
- Searchlight23.4°F
- Spring Valley24°F
- Summerlin South22.6°F
8b Zone 8b, 15 to 20°F 2 towns
8a Zone 8a, 10 to 15°F 2 towns
7b Zone 7b, 5 to 10°F 6 towns
7a Zone 7a, 0 to 5°F 26 towns
- Caliente2.6°F
- Carson City1.6°F
- Carter Springs4.1°F
- Cold Springs1.1°F
- Dayton1.1°F
- Fallon1.7°F
- Fallon Station2.4°F
- Fernley3.4°F
- Genoa2.4°F
- Incline Village0.3°F
- Kingsbury4.7°F
- Lemmon Valley2.5°F
- Mogul3.6°F
- Pioche4.4°F
- Schurz0.9°F
- Silver Springs2.9°F
- Spanish Springs3.6°F
- Stagecoach2°F
- Stateline2.9°F
- Tonopah3.3°F
- Topaz Ranch Estates2.2°F
- Verdi1.9°F
- Virginia City3.6°F
- Wadsworth3.4°F
- Yerington1.4°F
- Zephyr Cove1.8°F
6b Zone 6b, -5 to 0°F 15 towns
- Battle Mountain-4.4°F
- East Valley-1.5°F
- Eureka-3.9°F
- Fish Springs-0.3°F
- Gardnerville-1.8°F
- Gardnerville Ranchos-1.4°F
- Indian Hills-0.2°F
- Johnson Lane-0.2°F
- Lovelock-1.3°F
- Minden-1.6°F
- Panaca-2.1°F
- Smith-0.9°F
- Smith Valley-0.6°F
- West Wendover-2°F
- Winnemucca-4.9°F
6a Zone 6a, -10 to -5°F 2 towns
5b Zone 5b, -15 to -10°F 6 towns
5a Zone 5a, -20 to -15°F 1 towns
Counties
At the county’s center; a county with hills or a coast spans several zones.
| County | Zone at the center | Average coldest night |
|---|---|---|
| Churchill County | 6b | -1°F |
| Clark County | 9a | 24.9°F |
| Douglas County | 7a | 4.2°F |
| Elko County | 5a | -16.3°F |
| Esmeralda County | 7a | 4.5°F |
| Eureka County | 5b | -11.4°F |
| Humboldt County | 6a | -5.3°F |
| Lander County | 6a | -9.8°F |
| Lincoln County | 7a | 1.5°F |
| Lyon County | 7a | 0.9°F |
| Mineral County | 7b | 5.2°F |
| Nye County | 7a | 1.5°F |
| Pershing County | 6b | -2.3°F |
| Storey County | 7a | 4.7°F |
| Washoe County | 7a | 3.1°F |
| White Pine County | 5b | -12°F |
The zones
A plant hardiness zone is set by the average of each winter’s single coldest temperature, 1991 to 2020: zones are 10°F apart and each half zone, a and b, 5°F. It says how cold a winter night usually gets, not the coldest it has ever been, and nothing about summer heat, rain or soil. Plant labels give the coldest zone a perennial survives in.
| Zone | Average coldest night | In Celsius |
|---|---|---|
| 5a | -20 to -15°F | -28.9 to -26.1°C |
| 5b | -15 to -10°F | -26.1 to -23.3°C |
| 6a | -10 to -5°F | -23.3 to -20.6°C |
| 6b | -5 to 0°F | -20.6 to -17.8°C |
| 7a | 0 to 5°F | -17.8 to -15.0°C |
| 7b | 5 to 10°F | -15.0 to -12.2°C |
| 8a | 10 to 15°F | -12.2 to -9.4°C |
| 8b | 15 to 20°F | -9.4 to -6.7°C |
| 9a | 20 to 25°F | -6.7 to -3.9°C |
| 9b | 25 to 30°F | -3.9 to -1.1°C |
| 10a | 30 to 35°F | -1.1 to 1.7°C |
Sources
Hardiness zones: USDA Plant Hardiness Zone Map, 2023, Agricultural Research Service, U.S. Department of Agriculture, from the GIS data of the PRISM Climate Group, Oregon State University, which may be freely reproduced and redistributed. Drawn by WeatherOverTime from the USDA-ARS and Oregon State University PRISM Climate Group 2023 GIS data; this is not the official USDA Plant Hardiness Zone Map.