Last spring frost
Mar 29
Frost Dates for Throckmorton, TX
First fall frost
Nov 7
Growing season
223 days
Hardiness zone
8a
In an average year around Throckmorton, TX, the last spring frost (32°F) is about Mar 29 and the first fall frost is about Nov 7, giving roughly a 223-day growing season. To be safe most years, wait until Mar 9 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 26 | Apr 8 | Mar 23 |
| Freeze (32°F) | Apr 16 | Mar 29 | Mar 9 |
| Hard (28°F) | Apr 3 | Mar 14 | Feb 25 |
| Severe (24°F) | Mar 21 | Mar 2 | Feb 5 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 26 | Apr 21 | Apr 16 | Apr 11 | Apr 8 | Apr 5 | Apr 2 | Mar 29 | Mar 23 |
| 32°F | Apr 16 | Apr 8 | Apr 4 | Apr 1 | Mar 29 | Mar 24 | Mar 20 | Mar 15 | Mar 9 |
| 28°F | Apr 3 | Mar 29 | Mar 23 | Mar 18 | Mar 14 | Mar 10 | Mar 7 | Mar 2 | Feb 25 |
| 24°F | Mar 21 | Mar 14 | Mar 10 | Mar 6 | Mar 2 | Feb 27 | Feb 22 | Feb 15 | Feb 5 |
| 20°F | Mar 9 | Mar 2 | Feb 27 | Feb 22 | Feb 17 | Feb 11 | Feb 5 | Jan 29 | Jan 17 |
| 16°F | Mar 1 | Feb 21 | Feb 14 | Feb 8 | Feb 1 | Jan 26 | Jan 17 | Jan 5 | Dec 24 |
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 16 | Oct 31 | Nov 13 |
| Freeze (32°F) | Oct 23 | Nov 7 | Nov 26 |
| Hard (28°F) | Oct 31 | Nov 15 | Dec 5 |
| Severe (24°F) | Nov 6 | Nov 28 | Dec 21 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 16 | Oct 21 | Oct 24 | Oct 28 | Oct 31 | Nov 2 | Nov 5 | Nov 8 | Nov 13 |
| 32°F | Oct 23 | Oct 29 | Nov 1 | Nov 5 | Nov 7 | Nov 10 | Nov 13 | Nov 19 | Nov 26 |
| 28°F | Oct 31 | Nov 4 | Nov 8 | Nov 11 | Nov 15 | Nov 20 | Nov 25 | Nov 30 | Dec 5 |
| 24°F | Nov 6 | Nov 13 | Nov 18 | Nov 23 | Nov 28 | Dec 1 | Dec 6 | Dec 13 | Dec 21 |
| 20°F | Nov 15 | Nov 25 | Nov 30 | Dec 4 | Dec 11 | Dec 17 | Dec 23 | Jan 1 | Jan 11 |
| 16°F | Nov 27 | Dec 5 | Dec 13 | Dec 20 | Dec 27 | Jan 2 | Jan 7 | Jan 17 | 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: Throckmorton 10N, Tx, about 11.7 miles away@if(!empty($station['elevation_ft'])), at 1,396 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 Throckmorton, TX?
On average, the last spring frost (32°F) around Throckmorton, TX is about Mar 29. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 9.
When is the first frost in the fall?
The first fall frost around Throckmorton, TX typically arrives about Nov 7. 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 29 on average, or Mar 9 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 223 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 76483 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026