Frost dates for El Morro National Mon, NM
At El Morro National Mon, the median last spring frost (32°F) is Jun 3 and the median first fall frost is Sep 27, for a typical growing season of 114 days. For a 90% chance that the last frost has passed, wait until Jun 15. Nearby ZIP codes are in USDA hardiness zones 5b to 6a.
- Jun 3Last spring frost (median)50% chance of 32°F after this date
- Jun 15Safer planting date10% chance of 32°F after this date
- Sep 27First fall frost (median)50% chance of 32°F by this date
- 114 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 | Jun 1 | Jun 12 | Jun 28 |
| 32°F | May 20 | Jun 3 | Jun 15 |
| 28°F | May 4 | May 20 | Jun 6 |
| 24°F | Apr 20 | May 4 | May 21 |
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 5 | Sep 19 | Sep 29 |
| 32°F | Sep 14 | Sep 27 | Oct 7 |
| 28°F | Sep 22 | Oct 4 | Oct 17 |
| 24°F | Oct 1 | Oct 13 | Oct 29 |
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 | 75 days | 95 days | 110 days |
| 32°F | 96 days | 114 days | 133 days |
| 28°F | 116 days | 137 days | 157 days |
| 24°F | 141 days | 161 days | 182 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 87321 | 6a | -10 to -5°F | 6 km |
| 87357 | 5b | -15 to -10°F | 24 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 USC00292785, at 35.0381, -108.3492, elevation 2202 m (7,223 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 201.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- McGaffey 5 SE (34 km)
- Thoreau 12 SE (34 km)
- Grants Airport (43 km)
- Grants Milan Muni Airport (43 km)
- Zuni (45 km)
- Fence Lake (52 km)
- Gallup Sand & Gravel (63 km)
- Gallup Muni Airport (67 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.