Last spring frost
Feb 25
Frost Dates for Premont, TX
First fall frost
Dec 1
Growing season
285 days
Hardiness zone
9b
In an average year around Premont, TX, the last spring frost (32°F) is about Feb 25 and the first fall frost is about Dec 1, giving roughly a 285-day growing season. To be safe most years, wait until Jan 19 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 4 | Mar 9 | Feb 9 |
| Freeze (32°F) | Mar 18 | Feb 25 | Jan 19 |
| Hard (28°F) | Mar 9 | Jan 31 | Dec 21 |
| Severe (24°F) | Mar 5 | Jan 13 | Dec 11 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 4 | Mar 27 | Mar 18 | Mar 13 | Mar 9 | Mar 5 | Feb 28 | Feb 22 | Feb 9 |
| 32°F | Mar 18 | Mar 11 | Mar 6 | Mar 1 | Feb 25 | Feb 17 | Feb 6 | Jan 29 | Jan 19 |
| 28°F | Mar 9 | Mar 1 | Feb 22 | Feb 10 | Jan 31 | Jan 23 | Jan 15 | Jan 4 | Dec 21 |
| 24°F | Mar 5 | Feb 20 | Feb 3 | Jan 24 | Jan 13 | Jan 6 | Dec 31 | Dec 25 | Dec 11 |
| 20°F | Mar 6 | Feb 16 | Feb 1 | Jan 16 | Jan 8 | Jan 5 | Jan 2 | Dec 29 | Dec 20 |
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 31 | Nov 18 | Dec 12 |
| Freeze (32°F) | Nov 12 | Dec 1 | Jan 1 |
| Hard (28°F) | Nov 24 | Dec 20 | Feb 1 |
| Severe (24°F) | Dec 4 | Jan 1 | Feb 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 31 | Nov 5 | Nov 10 | Nov 15 | Nov 18 | Nov 23 | Nov 29 | Dec 3 | Dec 12 |
| 32°F | Nov 12 | Nov 19 | Nov 23 | Nov 28 | Dec 1 | Dec 5 | Dec 11 | Dec 22 | Jan 1 |
| 28°F | Nov 24 | Dec 1 | Dec 5 | Dec 11 | Dec 20 | Dec 27 | Jan 2 | Jan 11 | Feb 1 |
| 24°F | Dec 4 | Dec 9 | Dec 17 | Dec 27 | Jan 1 | Jan 5 | Jan 13 | Jan 31 | Feb 20 |
| 20°F | Dec 14 | Dec 26 | Dec 31 | Jan 2 | Jan 5 | Jan 9 | Jan 21 | Feb 7 | Mar 4 |
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: Falfurrias, Tx, about 18.3 miles away@if(!empty($station['elevation_ft'])), at 139 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 Premont, TX?
On average, the last spring frost (32°F) around Premont, TX is about Feb 25. In cooler years it can run later, so for a safer bet many gardeners wait until Jan 19.
When is the first frost in the fall?
The first fall frost around Premont, TX typically arrives about Dec 1. 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 25 on average, or Jan 19 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 285 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 78375 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026