Last spring frost
Mar 8
Frost Dates for Thrall, TX
First fall frost
Nov 21
Growing season
257 days
Hardiness zone
9a
In an average year around Thrall, TX, the last spring frost (32°F) is about Mar 8 and the first fall frost is about Nov 21, giving roughly a 257-day growing season. To be safe most years, wait until Feb 14 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) | Apr 10 | Mar 21 | Mar 1 |
| Freeze (32°F) | Mar 30 | Mar 8 | Feb 14 |
| Hard (28°F) | Mar 15 | Feb 24 | Jan 22 |
| Severe (24°F) | Mar 7 | Feb 2 | Dec 28 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 10 | Apr 4 | Mar 31 | Mar 26 | Mar 21 | Mar 16 | Mar 12 | Mar 7 | Mar 1 |
| 32°F | Mar 30 | Mar 21 | Mar 16 | Mar 11 | Mar 8 | Mar 4 | Mar 1 | Feb 24 | Feb 14 |
| 28°F | Mar 15 | Mar 9 | Mar 4 | Mar 1 | Feb 24 | Feb 18 | Feb 10 | Feb 1 | Jan 22 |
| 24°F | Mar 7 | Feb 28 | Feb 19 | Feb 11 | Feb 2 | Jan 29 | Jan 20 | Jan 9 | Dec 28 |
| 20°F | Feb 24 | Feb 10 | Jan 31 | Jan 25 | Jan 19 | Jan 12 | Jan 5 | Dec 31 | Dec 21 |
| 16°F | Feb 1 | Jan 22 | Jan 15 | Jan 10 | Jan 7 | Jan 4 | Jan 1 | Dec 29 | Dec 20 |
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) | Oct 26 | Nov 9 | Nov 30 |
| Freeze (32°F) | Nov 2 | Nov 21 | Dec 12 |
| Hard (28°F) | Nov 12 | Dec 4 | Jan 2 |
| Severe (24°F) | Nov 25 | Dec 24 | Feb 1 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 26 | Oct 31 | Nov 3 | Nov 6 | Nov 9 | Nov 13 | Nov 17 | Nov 22 | Nov 30 |
| 32°F | Nov 2 | Nov 8 | Nov 13 | Nov 17 | Nov 21 | Nov 27 | Dec 1 | Dec 5 | Dec 12 |
| 28°F | Nov 12 | Nov 19 | Nov 24 | Dec 1 | Dec 4 | Dec 9 | Dec 16 | Dec 24 | Jan 2 |
| 24°F | Nov 25 | Dec 2 | Dec 8 | Dec 17 | Dec 24 | Jan 1 | Jan 6 | Jan 15 | Feb 1 |
| 20°F | Dec 8 | Dec 20 | Dec 27 | Jan 1 | Jan 4 | Jan 9 | Jan 17 | Jan 29 | Feb 11 |
| 16°F | Dec 20 | Dec 26 | Jan 1 | Jan 2 | Jan 5 | Jan 7 | Jan 11 | Jan 18 | Feb 1 |
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: Taylor 1Nw, Tx, about 11.1 miles away@if(!empty($station['elevation_ft'])), at 571 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 Thrall, TX?
On average, the last spring frost (32°F) around Thrall, TX is about Mar 8. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 14.
When is the first frost in the fall?
The first fall frost around Thrall, TX typically arrives about Nov 21. 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 Mar 8 on average, or Feb 14 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 257 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 76578 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026