Last spring frost
May 30
Frost Dates for Aragon, NM
First fall frost
Oct 3
Growing season
127 days
Hardiness zone
6a
In an average year around Aragon, NM, the last spring frost (32°F) is about May 30 and the first fall frost is about Oct 3, giving roughly a 127-day growing season. To be safe most years, wait until May 14 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 25 | Jun 10 | May 28 |
| Freeze (32°F) | Jun 12 | May 30 | May 14 |
| Hard (28°F) | Jun 2 | May 13 | Apr 29 |
| Severe (24°F) | May 13 | May 1 | Apr 17 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Jun 25 | Jun 20 | Jun 16 | Jun 13 | Jun 10 | Jun 7 | Jun 4 | May 31 | May 28 |
| 32°F | Jun 12 | Jun 8 | Jun 4 | Jun 1 | May 30 | May 26 | May 23 | May 18 | May 14 |
| 28°F | Jun 2 | May 25 | May 20 | May 17 | May 13 | May 10 | May 6 | May 3 | Apr 29 |
| 24°F | May 13 | May 9 | May 5 | May 3 | May 1 | Apr 28 | Apr 25 | Apr 22 | Apr 17 |
| 20°F | May 1 | Apr 28 | Apr 23 | Apr 20 | Apr 17 | Apr 14 | Apr 11 | Apr 7 | Apr 1 |
| 16°F | Apr 17 | Apr 11 | Apr 7 | Apr 3 | Mar 31 | Mar 25 | Mar 19 | Mar 14 | Mar 8 |
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 11 | Sep 26 | Oct 5 |
| Freeze (32°F) | Sep 22 | Oct 3 | Oct 14 |
| Hard (28°F) | Oct 1 | Oct 12 | Oct 25 |
| Severe (24°F) | Oct 8 | Oct 23 | Nov 5 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 11 | Sep 17 | Sep 21 | Sep 24 | Sep 26 | Sep 28 | Oct 1 | Oct 2 | Oct 5 |
| 32°F | Sep 22 | Sep 27 | Sep 30 | Oct 1 | Oct 3 | Oct 5 | Oct 8 | Oct 11 | Oct 14 |
| 28°F | Oct 1 | Oct 3 | Oct 6 | Oct 9 | Oct 12 | Oct 14 | Oct 17 | Oct 20 | Oct 25 |
| 24°F | Oct 8 | Oct 13 | Oct 17 | Oct 20 | Oct 23 | Oct 26 | Oct 29 | Nov 1 | Nov 5 |
| 20°F | Oct 17 | Oct 22 | Oct 26 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 13 | Nov 17 |
| 16°F | Oct 26 | Nov 1 | Nov 5 | Nov 9 | Nov 13 | Nov 16 | Nov 19 | Nov 23 | Nov 29 |
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: Reserve Rs, Nm, about 18.8 miles away@if(!empty($station['elevation_ft'])), at 5,847 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 Aragon, NM?
On average, the last spring frost (32°F) around Aragon, NM is about May 30. In cooler years it can run later, so for a safer bet many gardeners wait until May 14.
When is the first frost in the fall?
The first fall frost around Aragon, NM typically arrives about Oct 3. 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 30 on average, or May 14 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 127 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 87820 Planting calendar → New Mexico frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026