Last spring frost
Mar 14
Frost Dates for Southlake, TX
First fall frost
Nov 17
Growing season
249 days
Hardiness zone
8b
In an average year around Southlake, TX, the last spring frost (32°F) is about Mar 14 and the first fall frost is about Nov 17, giving roughly a 249-day growing season. To be safe most years, wait until Feb 23 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 15 | Mar 29 | Mar 8 |
| Freeze (32°F) | Apr 3 | Mar 14 | Feb 23 |
| Hard (28°F) | Mar 20 | Mar 1 | Feb 4 |
| Severe (24°F) | Mar 11 | Feb 12 | Jan 17 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 15 | Apr 9 | Apr 5 | Apr 2 | Mar 29 | Mar 25 | Mar 20 | Mar 15 | Mar 8 |
| 32°F | Apr 3 | Mar 29 | Mar 23 | Mar 18 | Mar 14 | Mar 11 | Mar 6 | Mar 1 | Feb 23 |
| 28°F | Mar 20 | Mar 14 | Mar 9 | Mar 5 | Mar 1 | Feb 25 | Feb 20 | Feb 13 | Feb 4 |
| 24°F | Mar 11 | Mar 2 | Feb 24 | Feb 18 | Feb 12 | Feb 6 | Jan 31 | Jan 26 | Jan 17 |
| 20°F | Feb 24 | Feb 13 | Feb 6 | Feb 1 | Jan 28 | Jan 22 | Jan 15 | Jan 7 | Dec 26 |
| 16°F | Feb 11 | Feb 2 | Jan 27 | Jan 22 | Jan 17 | Jan 12 | Jan 6 | Dec 31 | Dec 18 |
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 7 | Nov 23 |
| Freeze (32°F) | Nov 2 | Nov 17 | Dec 4 |
| Hard (28°F) | Nov 9 | Nov 29 | Dec 20 |
| Severe (24°F) | Nov 18 | Dec 13 | Jan 14 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 26 | Oct 30 | Nov 2 | Nov 5 | Nov 7 | Nov 10 | Nov 14 | Nov 18 | Nov 23 |
| 32°F | Nov 2 | Nov 6 | Nov 9 | Nov 13 | Nov 17 | Nov 21 | Nov 25 | Nov 29 | Dec 4 |
| 28°F | Nov 9 | Nov 15 | Nov 21 | Nov 26 | Nov 29 | Dec 2 | Dec 7 | Dec 13 | Dec 20 |
| 24°F | Nov 18 | Nov 27 | Dec 2 | Dec 7 | Dec 13 | Dec 19 | Dec 26 | Jan 3 | Jan 14 |
| 20°F | Dec 1 | Dec 10 | Dec 17 | Dec 25 | Jan 1 | Jan 6 | Jan 13 | Jan 20 | Feb 3 |
| 16°F | Dec 12 | Dec 21 | Dec 31 | Jan 3 | Jan 8 | Jan 14 | Jan 19 | Jan 26 | Feb 2 |
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: Grapevine Dam, Tx, about 5.4 miles away@if(!empty($station['elevation_ft'])), at 585 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 Southlake, TX?
On average, the last spring frost (32°F) around Southlake, TX is about Mar 14. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 23.
When is the first frost in the fall?
The first fall frost around Southlake, TX typically arrives about Nov 17. 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 14 on average, or Feb 23 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 249 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 76092 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026