Frost dates for Fort Worth Alliance Airport, TX
At Fort Worth Alliance Airport, the median last spring frost (32°F) is Mar 12 and the median first fall frost is Nov 17, for a typical growing season of 249 days. For a 90% chance that the last frost has passed, wait until Apr 3. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Mar 12Last spring frost (median)50% chance of 32°F after this date
- Apr 3Safer planting date10% chance of 32°F after this date
- Nov 17First fall frost (median)50% chance of 32°F by this date
- 249 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 | Mar 6 | Mar 27 | Apr 18 |
| 32°F | Feb 21 | Mar 12 | Apr 3 |
| 28°F | Feb 1 | Feb 28 | Mar 19 |
| 24°F | Jan 8 | Feb 11 | Mar 8 |
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 21 | Nov 6 | Nov 23 |
| 32°F | Oct 31 | Nov 17 | Dec 5 |
| 28°F | Nov 10 | Dec 1 | Dec 24 |
| 24°F | Nov 25 | Dec 17 | Jan 19 |
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 | 196 days | 225 days | 250 days |
| 32°F | 222 days | 249 days | 276 days |
| 28°F | 249 days | 276 days | 309 days |
| 24°F | 274 days | 307 days | 345 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 98% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 76177 | 8b | 15 to 20°F | 2 km |
| 76052 | 8b | 15 to 20°F | 5 km |
| 76244 | 8b | 15 to 20°F | 6 km |
| 76248 | 8b | 15 to 20°F | 10 km |
| 76262 | 8b | 15 to 20°F | 10 km |
| 76247 | 8b | 15 to 20°F | 13 km |
| 76071 | 8b | 15 to 20°F | 15 km |
| 76078 | 8a | 10 to 15°F | 19 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 USW00053909, at 32.9733, -97.3181, elevation 209 m (685 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 45.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Fort Worth Wsfo (16 km)
- Fort Worth Meacham Field (18 km)
- Fort Worth Meacham Field Naaf (18 km)
- Fort Worth Nature Center (20 km)
- Grapevine Dam (25 km)
- Fort Worth NAS (26 km)
- Denton Muni Airport (28 km)
- Dallas Fort Worth Airport (29 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.