Frost dates for Huntsville Muni Airport, TX
At Huntsville Muni Airport, the median last spring frost (32°F) is Mar 2 and the median first fall frost is Nov 26, for a typical growing season of 272 days. For a 90% chance that the last frost has passed, wait until Mar 24. Nearby ZIP codes are in USDA hardiness zone 9a.
- Mar 2Last spring frost (median)50% chance of 32°F after this date
- Mar 24Safer planting date10% chance of 32°F after this date
- Nov 26First fall frost (median)50% chance of 32°F by this date
- 272 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 22 | Mar 15 | Apr 6 |
| 32°F | Jan 31 | Mar 2 | Mar 24 |
| 28°F | Jan 8 | Feb 8 | Mar 10 |
| 24°F | Dec 26 | Jan 23 | 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 | Oct 30 | Nov 14 | Dec 1 |
| 32°F | Nov 7 | Nov 26 | Dec 19 |
| 28°F | Nov 20 | Dec 16 | Jan 17 |
| 24°F | Dec 7 | Jan 5 | Feb 6 |
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 | 216 days | 243 days | 270 days |
| 32°F | 240 days | 272 days | 307 days |
| 28°F | 272 days | 309 days | 347 days |
| 24°F | 308 days | 351 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 95% |
| 24°F | 69% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 77342 | 9a | 20 to 25°F | 3 km |
| 77320 | 9a | 20 to 25°F | 8 km |
| 77873 | 9a | 20 to 25°F | 27 km |
| 77876 | 9a | 20 to 25°F | 31 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 USW00053903, at 30.7439, -95.5861, elevation 112 m (366 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 19.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Huntsville (6 km)
- Madisonville (39 km)
- Conroe Montgomery Co Airport (46 km)
- Conroe (47 km)
- Livingston 2 NNE (63 km)
- Crockett (64 km)
- Cleveland (64 km)
- Groveton (66 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.