Frost dates for Tonopah, NV
At Tonopah, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 22, for a typical growing season of 173 days. For a 90% chance that the last frost has passed, wait until May 22. Nearby ZIP codes are in USDA hardiness zones 6a to 7b.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 22Safer planting date10% chance of 32°F after this date
- Oct 22First fall frost (median)50% chance of 32°F by this date
- 173 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 27 | May 15 | Jun 2 |
| 32°F | Apr 14 | Apr 30 | May 22 |
| 28°F | Mar 26 | Apr 16 | May 7 |
| 24°F | Mar 2 | Mar 28 | Apr 18 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Sep 28 | Oct 12 | Oct 28 |
| 32°F | Oct 5 | Oct 22 | Nov 8 |
| 28°F | Oct 16 | Nov 4 | Nov 19 |
| 24°F | Oct 27 | Nov 15 | Dec 2 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 126 days | 149 days | 172 days |
| 32°F | 146 days | 173 days | 198 days |
| 28°F | 172 days | 201 days | 226 days |
| 24°F | 201 days | 233 days | 263 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 89047 | 7a | 0 to 5°F | 50 km |
| 89022 | 6b | -5 to 0°F | 54 km |
| 89013 | 7b | 5 to 10°F | 78 km |
| 89010 | 7a | 0 to 5°F | 79 km |
| 89049 | 6b | -5 to 0°F | 81 km |
| 89045 | 6a | -10 to -5°F | 90 km |
| 89422 | 7a | 0 to 5°F | 92 km |
| 89420 | 7a | 0 to 5°F | 96 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00268160, at 38.0694, -117.2355, elevation 1832 m (6,010 ft).
- Data quality: Estimated from nearby stations (2+ years), 9 years of freeze data.
- Average days per year at or below 32°F: 127.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tonopah (13 km)
- Goldfield (40 km)
- Silverpeak (45 km)
- Smoky Valley - Carvers (80 km)
- Mina (84 km)
- Dyer 5s (85 km)
- Twin Spring Fallini (94 km)
- Gabbs 1ne (107 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.