Frost dates for Welder Wildlife Foundation, TX
At Welder Wildlife Foundation, the median last spring frost (32°F) is Feb 24 and the median first fall frost is Dec 1, for a typical growing season of 283 days. For a 90% chance that the last frost has passed, wait until Mar 15. Nearby ZIP codes are in USDA hardiness zone 9b.
- Feb 24Last spring frost (median)50% chance of 32°F after this date
- Mar 15Safer planting date10% chance of 32°F after this date
- Dec 1First fall frost (median)50% chance of 32°F by this date
- 283 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 | Feb 14 | Mar 8 | Mar 31 |
| 32°F | Jan 18 | Feb 24 | Mar 15 |
| 28°F | Dec 24 | Jan 31 | Mar 5 |
| 24°F | Dec 12 | Jan 12 | Feb 24 |
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 | Nov 1 | Nov 18 | Dec 9 |
| 32°F | Nov 9 | Dec 1 | Jan 1 |
| 28°F | Nov 22 | Dec 18 | Jan 24 |
| 24°F | Dec 3 | Dec 31 | Feb 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 | 226 days | 256 days | 287 days |
| 32°F | 252 days | 283 days | 324 days |
| 28°F | 279 days | 323 days | 365 days |
| 24°F | 316 days | 363 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 90% |
| 24°F | 54% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78393 | 9b | 25 to 30°F | 10 km |
| 78390 | 9b | 25 to 30°F | 14 km |
| 78359 | 9b | 25 to 30°F | 23 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 USC00419559, at 28.1136, -97.4178, elevation 15 m (50 ft).
- Data quality: Standard (24+ years of data), 24 years of freeze data.
- Average days per year at or below 32°F: 8.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Sinton (15 km)
- Refugio 3 SW (22 km)
- Refugio 2 NW (27 km)
- Rockport Aransas Co Airport (37 km)
- Rockport (37 km)
- Corpus Christi (38 km)
- Corpus Christi NWS (38 km)
- Robstown (43 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.