Last spring frost
May 10
Frost Dates for Tonopah, NV
First fall frost
Sep 30
Growing season
141 days
Hardiness zone
6b
In an average year around Tonopah, NV, the last spring frost (32°F) is about May 10 and the first fall frost is about Sep 30, giving roughly a 141-day growing season. To be safe most years, wait until Apr 24 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Jun 15 | May 26 | May 9 |
| Freeze (32°F) | Jun 2 | May 10 | Apr 24 |
| Hard (28°F) | May 12 | Apr 25 | Apr 7 |
| Severe (24°F) | Apr 30 | Apr 10 | Mar 21 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 15 | Jun 7 | Jun 2 | May 30 | May 26 | May 22 | May 18 | May 15 | May 9 |
| 32°F | Jun 2 | May 24 | May 17 | May 13 | May 10 | May 6 | May 3 | Apr 30 | Apr 24 |
| 28°F | May 12 | May 4 | May 1 | Apr 28 | Apr 25 | Apr 22 | Apr 18 | Apr 13 | Apr 7 |
| 24°F | Apr 30 | Apr 23 | Apr 18 | Apr 15 | Apr 10 | Apr 6 | Apr 2 | Mar 30 | Mar 21 |
| 20°F | Apr 15 | Apr 8 | Apr 3 | Mar 31 | Mar 27 | Mar 20 | Mar 13 | Mar 6 | Feb 26 |
| 16°F | Apr 1 | Mar 25 | Mar 15 | Mar 9 | Mar 2 | Feb 26 | Feb 20 | Feb 15 | Feb 9 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Sep 4 | Sep 17 | Oct 1 |
| Freeze (32°F) | Sep 15 | Sep 30 | Oct 12 |
| Hard (28°F) | Sep 28 | Oct 11 | Oct 24 |
| Severe (24°F) | Oct 11 | Oct 22 | Nov 3 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 4 | Sep 8 | Sep 12 | Sep 15 | Sep 17 | Sep 20 | Sep 23 | Sep 27 | Oct 1 |
| 32°F | Sep 15 | Sep 20 | Sep 24 | Sep 27 | Sep 30 | Oct 2 | Oct 5 | Oct 8 | Oct 12 |
| 28°F | Sep 28 | Oct 2 | Oct 5 | Oct 7 | Oct 11 | Oct 14 | Oct 16 | Oct 19 | Oct 24 |
| 24°F | Oct 11 | Oct 15 | Oct 18 | Oct 20 | Oct 22 | Oct 25 | Oct 28 | Oct 31 | Nov 3 |
| 20°F | Oct 19 | Oct 24 | Oct 27 | Oct 30 | Nov 1 | Nov 3 | Nov 5 | Nov 8 | Nov 12 |
| 16°F | Oct 28 | Nov 1 | Nov 4 | Nov 7 | Nov 9 | Nov 13 | Nov 16 | Nov 19 | Nov 22 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Twin Spring Fallini, Nv, about 17.8 miles away@if(!empty($station['elevation_ft'])), at 5,300 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Tonopah, NV?
On average, the last spring frost (32°F) around Tonopah, NV is about May 10. In cooler years it can run later, so for a safer bet many gardeners wait until Apr 24.
When is the first frost in the fall?
The first fall frost around Tonopah, NV typically arrives about Sep 30. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around May 10 on average, or Apr 24 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 141 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 89049 Planting calendar → Nevada frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026