Frost dates for Houston Intercont Airport, TX
At Houston Intercont Airport, the median last spring frost (32°F) is Feb 13 and the median first fall frost is Dec 9, for a typical growing season of 300 days. For a 90% chance that the last frost has passed, wait until Mar 12. Nearby ZIP codes are in USDA hardiness zone 9b.
- Feb 13Last spring frost (median)50% chance of 32°F after this date
- Mar 12Safer planting date10% chance of 32°F after this date
- Dec 9First fall frost (median)50% chance of 32°F by this date
- 300 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 5 | Mar 2 | Mar 25 |
| 32°F | Jan 12 | Feb 13 | Mar 12 |
| 28°F | Dec 26 | Jan 27 | Mar 2 |
| 24°F | Dec 21 | Jan 15 | Feb 15 |
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 6 | Nov 25 | Dec 14 |
| 32°F | Nov 17 | Dec 9 | Jan 11 |
| 28°F | Dec 2 | Jan 2 | Feb 2 |
| 24°F | Dec 14 | Jan 8 | Feb 5 |
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 | 234 days | 266 days | 296 days |
| 32°F | 264 days | 300 days | 339 days |
| 28°F | 301 days | 343 days | 365 days |
| 24°F | 338 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 99% |
| 28°F | 77% |
| 24°F | 33% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 77032 | 9b | 25 to 30°F | 2 km |
| 77073 | 9b | 25 to 30°F | 4 km |
| 77060 | 9b | 25 to 30°F | 6 km |
| 77039 | 9b | 25 to 30°F | 8 km |
| 77090 | 9b | 25 to 30°F | 8 km |
| 77338 | 9b | 25 to 30°F | 8 km |
| 77067 | 9b | 25 to 30°F | 9 km |
| 77373 | 9b | 25 to 30°F | 9 km |
| 77014 | 9b | 25 to 30°F | 10 km |
| 77396 | 9b | 25 to 30°F | 10 km |
| 77037 | 9b | 25 to 30°F | 10 km |
| 77038 | 9b | 25 to 30°F | 10 km |
| 77050 | 9b | 25 to 30°F | 12 km |
| 77093 | 9b | 25 to 30°F | 13 km |
| 77386 | 9b | 25 to 30°F | 13 km |
| 77076 | 9b | 25 to 30°F | 14 km |
| 77088 | 9b | 25 to 30°F | 14 km |
| 77086 | 9b | 25 to 30°F | 14 km |
| 77339 | 9b | 25 to 30°F | 15 km |
| 77091 | 9b | 25 to 30°F | 16 km |
| 77365 | 9b | 25 to 30°F | 17 km |
| 77346 | 9b | 25 to 30°F | 18 km |
| 77092 | 9b | 25 to 30°F | 20 km |
| 77040 | 9b | 25 to 30°F | 20 km |
| 77345 | 9b | 25 to 30°F | 21 km |
| 77080 | 9b | 25 to 30°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 USW00012960, at 29.9800, -95.3600, elevation 29 m (95 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 10.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Houston Hooks Mem Airport (21 km)
- Houston-Port (27 km)
- Baytown (36 km)
- Houston Hobby Airport (39 km)
- Conroe (41 km)
- Conroe Montgomery Co Airport (42 km)
- Houston Sugarland Mem (49 km)
- Sugar Land (49 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.