Last spring frost
Feb 2
Frost Dates for Houston, TX
First fall frost
Dec 25
Growing season
327 days
Hardiness zone
9b
In an average year around Houston, TX, the last spring frost (32°F) is about Feb 2 and the first fall frost is about Dec 25, giving roughly a 327-day growing season. To be safe most years, wait until Dec 31 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Mar 16 | Feb 24 | Jan 22 |
| Freeze (32°F) | Mar 5 | Feb 2 | Dec 31 |
| Hard (28°F) | Feb 25 | Jan 23 | Dec 24 |
| Severe (24°F) | Feb 16 | Jan 15 | Dec 29 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 16 | Mar 9 | Mar 4 | Feb 28 | Feb 24 | Feb 17 | Feb 8 | Jan 31 | Jan 22 |
| 32°F | Mar 5 | Feb 28 | Feb 18 | Feb 9 | Feb 2 | Jan 28 | Jan 21 | Jan 13 | Dec 31 |
| 28°F | Feb 25 | Feb 11 | Feb 2 | Jan 27 | Jan 23 | Jan 17 | Jan 11 | Jan 2 | Dec 24 |
| 24°F | Feb 16 | Feb 3 | Jan 28 | Jan 22 | Jan 15 | Jan 11 | Jan 7 | Jan 3 | Dec 29 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Nov 12 | Dec 2 | Jan 1 |
| Freeze (32°F) | Nov 27 | Dec 25 | Jan 21 |
| Hard (28°F) | Dec 8 | Jan 5 | Feb 9 |
| Severe (24°F) | Dec 25 | Jan 10 | Feb 14 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 12 | Nov 19 | Nov 25 | Nov 30 | Dec 2 | Dec 7 | Dec 13 | Dec 22 | Jan 1 |
| 32°F | Nov 27 | Dec 2 | Dec 8 | Dec 17 | Dec 25 | Dec 31 | Jan 4 | Jan 10 | Jan 21 |
| 28°F | Dec 8 | Dec 19 | Dec 28 | Jan 1 | Jan 5 | Jan 10 | Jan 16 | Jan 26 | Feb 9 |
| 24°F | Dec 25 | Jan 1 | Jan 3 | Jan 7 | Jan 10 | Jan 15 | Jan 22 | Feb 1 | Feb 14 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Houston-Port, Tx, about 12.1 miles away@if(!empty($station['elevation_ft'])), at 19 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Houston, TX?
On average, the last spring frost (32°F) around Houston, TX is about Feb 2. In cooler years it can run later, so for a safer bet many gardeners wait until Dec 31.
When is the first frost in the fall?
The first fall frost around Houston, TX typically arrives about Dec 25. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Feb 2 on average, or Dec 31 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 327 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 77081 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026