Last spring frost
Apr 11
Frost Dates for Morton, TX
First fall frost
Oct 31
Growing season
199 days
Hardiness zone
7b
In an average year around Morton, TX, the last spring frost (32°F) is about Apr 11 and the first fall frost is about Oct 31, giving roughly a 199-day growing season. To be safe most years, wait until Mar 28 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) | May 3 | Apr 21 | Apr 8 |
| Freeze (32°F) | Apr 26 | Apr 11 | Mar 28 |
| Hard (28°F) | Apr 17 | Mar 31 | Mar 11 |
| Severe (24°F) | Apr 4 | Mar 15 | Feb 26 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 3 | Apr 30 | Apr 27 | Apr 24 | Apr 21 | Apr 19 | Apr 16 | Apr 13 | Apr 8 |
| 32°F | Apr 26 | Apr 20 | Apr 17 | Apr 14 | Apr 11 | Apr 8 | Apr 5 | Apr 1 | Mar 28 |
| 28°F | Apr 17 | Apr 10 | Apr 6 | Apr 3 | Mar 31 | Mar 27 | Mar 22 | Mar 17 | Mar 11 |
| 24°F | Apr 4 | Mar 31 | Mar 25 | Mar 20 | Mar 15 | Mar 11 | Mar 7 | Mar 3 | Feb 26 |
| 20°F | Mar 23 | Mar 15 | Mar 10 | Mar 6 | Mar 3 | Feb 28 | Feb 24 | Feb 19 | Feb 12 |
| 16°F | Mar 11 | Mar 4 | Feb 28 | Feb 22 | Feb 16 | Feb 10 | Feb 6 | Jan 30 | Jan 15 |
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 4 | Oct 19 | Nov 1 |
| Freeze (32°F) | Oct 16 | Oct 31 | Nov 11 |
| Hard (28°F) | Oct 24 | Nov 7 | Nov 21 |
| Severe (24°F) | Nov 2 | Nov 18 | Dec 3 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 4 | Oct 10 | Oct 14 | Oct 17 | Oct 19 | Oct 22 | Oct 25 | Oct 28 | Nov 1 |
| 32°F | Oct 16 | Oct 21 | Oct 24 | Oct 28 | Oct 31 | Nov 1 | Nov 4 | Nov 7 | Nov 11 |
| 28°F | Oct 24 | Oct 30 | Nov 2 | Nov 5 | Nov 7 | Nov 10 | Nov 13 | Nov 17 | Nov 21 |
| 24°F | Nov 2 | Nov 7 | Nov 11 | Nov 14 | Nov 18 | Nov 20 | Nov 24 | Nov 28 | Dec 3 |
| 20°F | Nov 10 | Nov 17 | Nov 22 | Nov 25 | Nov 30 | Dec 3 | Dec 6 | Dec 11 | Dec 17 |
| 16°F | Nov 22 | Nov 30 | Dec 4 | Dec 8 | Dec 14 | Dec 18 | Dec 23 | Dec 30 | Jan 8 |
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: Morton, Tx, about 6.4 miles away@if(!empty($station['elevation_ft'])), at 3,766 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 Morton, TX?
On average, the last spring frost (32°F) around Morton, TX is about Apr 11. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 28.
When is the first frost in the fall?
The first fall frost around Morton, TX typically arrives about Oct 31. 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 Apr 11 on average, or Mar 28 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 199 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 79346 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026