Last spring frost
Apr 3
Frost Dates for Alamo, NV
First fall frost
Oct 31
Growing season
212 days
Hardiness zone
8a
In an average year around Alamo, NV, the last spring frost (32°F) is about Apr 3 and the first fall frost is about Oct 31, giving roughly a 212-day growing season. To be safe most years, wait until Mar 12 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) | May 11 | Apr 21 | Apr 3 |
| Freeze (32°F) | Apr 21 | Apr 3 | Mar 12 |
| Hard (28°F) | Apr 4 | Mar 12 | Feb 21 |
| Severe (24°F) | Mar 14 | Feb 22 | Jan 25 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 11 | May 4 | Apr 30 | Apr 25 | Apr 21 | Apr 17 | Apr 13 | Apr 9 | Apr 3 |
| 32°F | Apr 21 | Apr 14 | Apr 9 | Apr 6 | Apr 3 | Mar 30 | Mar 25 | Mar 20 | Mar 12 |
| 28°F | Apr 4 | Mar 29 | Mar 22 | Mar 16 | Mar 12 | Mar 7 | Mar 4 | Feb 28 | Feb 21 |
| 24°F | Mar 14 | Mar 7 | Mar 2 | Feb 26 | Feb 22 | Feb 15 | Feb 9 | Feb 3 | Jan 25 |
| 20°F | Mar 1 | Feb 16 | Feb 7 | Jan 31 | Jan 25 | Jan 18 | Jan 11 | Jan 4 | Dec 28 |
| 16°F | Feb 6 | Jan 27 | Jan 15 | Jan 9 | Jan 5 | Jan 1 | Dec 28 | Dec 21 | Dec 11 |
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) | Oct 8 | Oct 21 | Nov 5 |
| Freeze (32°F) | Oct 16 | Oct 31 | Nov 18 |
| Hard (28°F) | Oct 24 | Nov 12 | Nov 30 |
| Severe (24°F) | Nov 6 | Nov 25 | Dec 11 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 8 | Oct 13 | Oct 16 | Oct 19 | Oct 21 | Oct 24 | Oct 28 | Oct 31 | Nov 5 |
| 32°F | Oct 16 | Oct 21 | Oct 24 | Oct 28 | Oct 31 | Nov 3 | Nov 7 | Nov 12 | Nov 18 |
| 28°F | Oct 24 | Oct 30 | Nov 4 | Nov 8 | Nov 12 | Nov 16 | Nov 20 | Nov 25 | Nov 30 |
| 24°F | Nov 6 | Nov 12 | Nov 17 | Nov 21 | Nov 25 | Nov 28 | Dec 2 | Dec 6 | Dec 11 |
| 20°F | Nov 17 | Nov 25 | Nov 30 | Dec 4 | Dec 7 | Dec 11 | Dec 15 | Dec 21 | Jan 1 |
| 16°F | Nov 28 | Dec 5 | Dec 10 | Dec 14 | Dec 20 | Dec 26 | Jan 1 | Jan 6 | Jan 24 |
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: Pahranagat Wr, Nv, about 11 miles away@if(!empty($station['elevation_ft'])), at 3,334 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 Alamo, NV?
On average, the last spring frost (32°F) around Alamo, NV is about Apr 3. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 12.
When is the first frost in the fall?
The first fall frost around Alamo, NV typically arrives about Oct 31. 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 Apr 3 on average, or Mar 12 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 212 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 89001 Planting calendar → Nevada frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026