Frost dates for Grants Milan Muni Airport, NM
At Grants Milan Muni Airport, the median last spring frost (32°F) is May 24 and the median first fall frost is Oct 1, for a typical growing season of 129 days. For a 90% chance that the last frost has passed, wait until Jun 9. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- May 24Last spring frost (median)50% chance of 32°F after this date
- Jun 9Safer planting date10% chance of 32°F after this date
- Oct 1First fall frost (median)50% chance of 32°F by this date
- 129 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 | May 19 | Jun 3 | Jun 19 |
| 32°F | May 7 | May 24 | Jun 9 |
| 28°F | Apr 24 | May 9 | May 29 |
| 24°F | Apr 11 | Apr 28 | May 15 |
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 11 | Sep 24 | Oct 4 |
| 32°F | Sep 19 | Oct 1 | Oct 13 |
| 28°F | Sep 28 | Oct 12 | Oct 23 |
| 24°F | Oct 8 | Oct 22 | Nov 3 |
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 | 92 days | 111 days | 128 days |
| 32°F | 108 days | 129 days | 150 days |
| 28°F | 130 days | 153 days | 172 days |
| 24°F | 154 days | 175 days | 196 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 |
|---|---|---|---|
| 87021 | 6a | -10 to -5°F | 3 km |
| 87005 | 6a | -10 to -5°F | 15 km |
| 87051 | 6a | -10 to -5°F | 15 km |
| 87020 | 6a | -10 to -5°F | 17 km |
| 87049 | 6b | -5 to 0°F | 25 km |
| 87045 | 6a | -10 to -5°F | 28 km |
| 87034 | 6b | -5 to 0°F | 36 km |
| 87323 | 6a | -10 to -5°F | 41 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 USW00093057, at 35.1664, -107.8992, elevation 1987 m (6,520 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 192.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Grants Airport (0 km)
- Thoreau 12 SE (27 km)
- Cubero (36 km)
- El Morro National Mon (43 km)
- McGaffey 5 SE (53 km)
- Pietown 19ne (75 km)
- Gallup Sand & Gravel (83 km)
- Zuni (86 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.