Frost dates for Marfa 3w, TX
At Marfa 3w, the median last spring frost (32°F) is Apr 14 and the median first fall frost is Oct 27, for a typical growing season of 196 days. For a 90% chance that the last frost has passed, wait until May 1. Nearby ZIP codes are in USDA hardiness zones 8a to 9a.
- Apr 14Last spring frost (median)50% chance of 32°F after this date
- May 1Safer planting date10% chance of 32°F after this date
- Oct 27First fall frost (median)50% chance of 32°F by this date
- 196 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 | Apr 9 | Apr 26 | May 9 |
| 32°F | Mar 30 | Apr 14 | May 1 |
| 28°F | Mar 12 | Apr 2 | Apr 21 |
| 24°F | Feb 26 | Mar 14 | Apr 6 |
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 | Oct 4 | Oct 19 | Nov 3 |
| 32°F | Oct 13 | Oct 27 | Nov 13 |
| 28°F | Oct 20 | Nov 7 | Nov 22 |
| 24°F | Oct 29 | Nov 17 | Dec 2 |
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 | 156 days | 175 days | 198 days |
| 32°F | 172 days | 196 days | 217 days |
| 28°F | 191 days | 216 days | 242 days |
| 24°F | 216 days | 245 days | 270 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 |
|---|---|---|---|
| 79734 | 8a | 10 to 15°F | 42 km |
| 79830 | 8b | 15 to 20°F | 44 km |
| 79843 | 8a | 10 to 15°F | 59 km |
| 79854 | 8a | 10 to 15°F | 62 km |
| 79845 | 9a | 20 to 25°F | 80 km |
| 79718 | 8a | 10 to 15°F | 82 km |
| 79780 | 8a | 10 to 15°F | 90 km |
| 79855 | 8a | 10 to 15°F | 102 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 USC00415596, at 30.3125, -104.0722, elevation 1460 m (4,790 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 107.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Alpine 7nw (29 km)
- Fort Davis (37 km)
- Alpine (40 km)
- Mount Locke (44 km)
- Valentine (51 km)
- Candelaria (62 km)
- Marathon (78 km)
- Kent 8se (78 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.