Frost dates for Houston Hobby Airport, TX
At Houston Hobby Airport, the median last spring frost (32°F) is Jan 30 and the median first fall frost is Dec 28, for a typical growing season of 330 days. For a 90% chance that the last frost has passed, wait until Mar 1. Nearby ZIP codes are in USDA hardiness zone 9b.
- Jan 30Last spring frost (median)50% chance of 32°F after this date
- Mar 1Safer planting date10% chance of 32°F after this date
- Dec 28First fall frost (median)50% chance of 32°F by this date
- 330 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 | Jan 20 | Feb 17 | Mar 12 |
| 32°F | Dec 29 | Jan 30 | Mar 1 |
| 28°F | Dec 22 | Jan 17 | Feb 17 |
| 24°F | Jan 1 | Jan 13 | Feb 10 |
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 15 | Dec 4 | Jan 3 |
| 32°F | Nov 27 | Dec 28 | Jan 27 |
| 28°F | Dec 12 | Jan 8 | Feb 4 |
| 24°F | Jan 1 | Jan 12 | Feb 7 |
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 | 260 days | 293 days | 328 days |
| 32°F | 292 days | 330 days | 365 days |
| 28°F | 329 days | 365 days | 365 days |
| 24°F | 361 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 86% |
| 28°F | 47% |
| 24°F | 14% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 77061 | 9b | 25 to 30°F | 1 km |
| 77075 | 9b | 25 to 30°F | 2 km |
| 77048 | 9b | 25 to 30°F | 5 km |
| 77587 | 9b | 25 to 30°F | 6 km |
| 77087 | 9b | 25 to 30°F | 6 km |
| 77033 | 9b | 25 to 30°F | 6 km |
| 77034 | 9b | 25 to 30°F | 9 km |
| 77504 | 9b | 25 to 30°F | 9 km |
| 77502 | 9b | 25 to 30°F | 9 km |
| 77051 | 9b | 25 to 30°F | 10 km |
| 77047 | 9b | 25 to 30°F | 11 km |
| 77054 | 9b | 25 to 30°F | 13 km |
| 77505 | 9b | 25 to 30°F | 14 km |
| 77045 | 9b | 25 to 30°F | 14 km |
| 77025 | 9b | 25 to 30°F | 16 km |
| 77053 | 9b | 25 to 30°F | 18 km |
| 77571 | 9b | 25 to 30°F | 22 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 USW00012918, at 29.6381, -95.2819, elevation 13 m (44 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 4.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Houston-Port (12 km)
- Houston Clover Field (14 km)
- Houston NWSO (27 km)
- Alvin (31 km)
- Houston Sugarland Mem (36 km)
- Sugar Land (36 km)
- Thompsons 3 WSW (38 km)
- Houston Intercont Airport (39 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.