Last spring frost
Mar 18
Frost Dates for Cooper, TX
First fall frost
Nov 13
Growing season
241 days
Hardiness zone
8b
In an average year around Cooper, TX, the last spring frost (32°F) is about Mar 18 and the first fall frost is about Nov 13, giving roughly a 241-day growing season. To be safe most years, wait until Mar 1 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 16 | Mar 30 | Mar 14 |
| Freeze (32°F) | Apr 1 | Mar 18 | Mar 1 |
| Hard (28°F) | Mar 23 | Mar 6 | Feb 13 |
| Severe (24°F) | Mar 14 | Feb 23 | Jan 22 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 16 | Apr 8 | Apr 4 | Apr 1 | Mar 30 | Mar 27 | Mar 23 | Mar 19 | Mar 14 |
| 32°F | Apr 1 | Mar 28 | Mar 24 | Mar 21 | Mar 18 | Mar 14 | Mar 11 | Mar 6 | Mar 1 |
| 28°F | Mar 23 | Mar 18 | Mar 14 | Mar 10 | Mar 6 | Mar 3 | Feb 28 | Feb 23 | Feb 13 |
| 24°F | Mar 14 | Mar 8 | Mar 4 | Feb 28 | Feb 23 | Feb 15 | Feb 7 | Jan 31 | Jan 22 |
| 20°F | Mar 7 | Feb 28 | Feb 20 | Feb 10 | Feb 2 | Jan 29 | Jan 22 | Jan 13 | Dec 31 |
| 16°F | Feb 28 | Feb 14 | Feb 5 | Jan 30 | Jan 25 | Jan 20 | Jan 13 | Jan 4 | Dec 25 |
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 22 | Nov 4 | Nov 20 |
| Freeze (32°F) | Oct 30 | Nov 13 | Dec 1 |
| Hard (28°F) | Nov 6 | Nov 26 | Dec 20 |
| Severe (24°F) | Nov 17 | Dec 12 | Jan 9 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 22 | Oct 27 | Oct 31 | Nov 2 | Nov 4 | Nov 6 | Nov 10 | Nov 14 | Nov 20 |
| 32°F | Oct 30 | Nov 3 | Nov 6 | Nov 9 | Nov 13 | Nov 17 | Nov 21 | Nov 27 | Dec 1 |
| 28°F | Nov 6 | Nov 11 | Nov 17 | Nov 21 | Nov 26 | Dec 1 | Dec 4 | Dec 9 | Dec 20 |
| 24°F | Nov 17 | Nov 26 | Dec 1 | Dec 6 | Dec 12 | Dec 21 | Dec 27 | Jan 1 | Jan 9 |
| 20°F | Dec 3 | Dec 11 | Dec 19 | Dec 25 | Jan 1 | Jan 4 | Jan 10 | Jan 17 | Feb 1 |
| 16°F | Dec 14 | Dec 22 | Dec 30 | Jan 3 | Jan 8 | Jan 14 | Jan 20 | Jan 29 | Feb 9 |
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: Cooper Dam, Tx, about 11.7 miles away@if(!empty($station['elevation_ft'])), at 463 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 Cooper, TX?
On average, the last spring frost (32°F) around Cooper, TX is about Mar 18. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 1.
When is the first frost in the fall?
The first fall frost around Cooper, TX typically arrives about Nov 13. 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 18 on average, or Mar 1 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 241 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 75415 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026