Last spring frost
Feb 27
Frost Dates for Box Canyon, TX
First fall frost
Nov 27
Growing season
270 days
Hardiness zone
8b
In an average year around Box Canyon, TX, the last spring frost (32°F) is about Feb 27 and the first fall frost is about Nov 27, giving roughly a 270-day growing season. To be safe most years, wait until Feb 4 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 30 | Mar 8 | Feb 21 |
| Freeze (32°F) | Mar 17 | Feb 27 | Feb 4 |
| Hard (28°F) | Mar 7 | Feb 10 | Jan 14 |
| Severe (24°F) | Feb 20 | Jan 19 | Dec 17 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 30 | Mar 23 | Mar 16 | Mar 12 | Mar 8 | Mar 5 | Mar 1 | Feb 26 | Feb 21 |
| 32°F | Mar 17 | Mar 9 | Mar 6 | Mar 2 | Feb 27 | Feb 23 | Feb 17 | Feb 12 | Feb 4 |
| 28°F | Mar 7 | Feb 28 | Feb 23 | Feb 16 | Feb 10 | Feb 3 | Jan 30 | Jan 23 | Jan 14 |
| 24°F | Feb 20 | Feb 9 | Feb 2 | Jan 26 | Jan 19 | Jan 11 | Jan 3 | Dec 29 | Dec 17 |
| 20°F | Feb 7 | Feb 1 | Jan 20 | Jan 10 | Jan 4 | Dec 31 | Dec 28 | Dec 20 | Dec 11 |
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 1 | Nov 16 | Dec 2 |
| Freeze (32°F) | Nov 10 | Nov 27 | Dec 13 |
| Hard (28°F) | Nov 22 | Dec 8 | Jan 1 |
| Severe (24°F) | Dec 1 | Dec 22 | Jan 23 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 1 | Nov 6 | Nov 10 | Nov 13 | Nov 16 | Nov 19 | Nov 22 | Nov 27 | Dec 2 |
| 32°F | Nov 10 | Nov 15 | Nov 19 | Nov 24 | Nov 27 | Nov 30 | Dec 3 | Dec 7 | Dec 13 |
| 28°F | Nov 22 | Nov 27 | Dec 1 | Dec 5 | Dec 8 | Dec 12 | Dec 17 | Dec 23 | Jan 1 |
| 24°F | Dec 1 | Dec 6 | Dec 12 | Dec 17 | Dec 22 | Dec 28 | Jan 1 | Jan 8 | Jan 23 |
| 20°F | Dec 6 | Dec 14 | Dec 20 | Dec 26 | Dec 30 | Jan 2 | Jan 9 | Jan 19 | Feb 3 |
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: Langtry, Tx, about 7.3 miles away@if(!empty($station['elevation_ft'])), at 1,290 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 Box Canyon, TX?
On average, the last spring frost (32°F) around Box Canyon, TX is about Feb 27. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 4.
When is the first frost in the fall?
The first fall frost around Box Canyon, TX typically arrives about Nov 27. 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 27 on average, or Feb 4 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 270 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 78871 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026