Frost dates for Sealy, TX
At Sealy, the median last spring frost (32°F) is Feb 28 and the median first fall frost is Nov 30, for a typical growing season of 276 days. For a 90% chance that the last frost has passed, wait until Mar 21. Nearby ZIP codes are in USDA hardiness zone 9a.
- Feb 28Last spring frost (median)50% chance of 32°F after this date
- Mar 21Safer planting date10% chance of 32°F after this date
- Nov 30First fall frost (median)50% chance of 32°F by this date
- 276 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 20 | Mar 13 | Apr 5 |
| 32°F | Jan 30 | Feb 28 | Mar 21 |
| 28°F | Jan 2 | Feb 10 | Mar 9 |
| 24°F | Dec 22 | Jan 28 | Mar 1 |
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 17 | Dec 6 |
| 32°F | Nov 9 | Nov 30 | Dec 29 |
| 28°F | Nov 20 | Dec 20 | Jan 29 |
| 24°F | Dec 4 | Jan 5 | Feb 10 |
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 | 220 days | 249 days | 279 days |
| 32°F | 245 days | 276 days | 311 days |
| 28°F | 275 days | 314 days | 353 days |
| 24°F | 305 days | 351 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 94% |
| 24°F | 62% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 77474 | 9a | 20 to 25°F | 4 km |
| 77473 | 9a | 20 to 25°F | 5 km |
| 77466 | 9a | 20 to 25°F | 13 km |
| 77485 | 9a | 20 to 25°F | 17 km |
| 77423 | 9a | 20 to 25°F | 17 km |
| 77476 | 9a | 20 to 25°F | 20 km |
| 77441 | 9a | 20 to 25°F | 24 km |
| 77464 | 9a | 20 to 25°F | 26 km |
| 77451 | 9a | 20 to 25°F | 36 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 USC00418160, at 29.7714, -96.1456, elevation 60 m (196 ft).
- Data quality: Representative (10+ years), 11 years of freeze data.
- Average days per year at or below 32°F: 13.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Eagle Lake Resch Center (27 km)
- Bellville 6nne (30 km)
- Columbus (42 km)
- Brenham (49 km)
- Sugar Land (50 km)
- Houston Sugarland Mem (50 km)
- Thompsons 3 WSW (59 km)
- Washington State Park (61 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.