Last spring frost
Apr 1
Frost Dates for Post, TX
First fall frost
Nov 9
Growing season
223 days
Hardiness zone
8a
In an average year around Post, TX, the last spring frost (32°F) is about Apr 1 and the first fall frost is about Nov 9, giving roughly a 223-day growing season. To be safe most years, wait until Mar 10 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 10 | Mar 25 |
| Freeze (32°F) | Apr 19 | Apr 1 | Mar 10 |
| Hard (28°F) | Apr 5 | Mar 17 | Feb 26 |
| Severe (24°F) | Mar 23 | Mar 2 | Feb 11 |
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 13 | Apr 10 | Apr 6 | Apr 3 | Mar 31 | Mar 25 |
| 32°F | Apr 19 | Apr 11 | Apr 7 | Apr 4 | Apr 1 | Mar 29 | Mar 23 | Mar 17 | Mar 10 |
| 28°F | Apr 5 | Apr 1 | Mar 27 | Mar 21 | Mar 17 | Mar 12 | Mar 7 | Mar 3 | Feb 26 |
| 24°F | Mar 23 | Mar 16 | Mar 10 | Mar 6 | Mar 2 | Feb 28 | Feb 23 | Feb 18 | Feb 11 |
| 20°F | Mar 10 | Mar 3 | Feb 28 | Feb 23 | Feb 18 | Feb 13 | Feb 8 | Jan 31 | Jan 17 |
| 16°F | Feb 28 | Feb 21 | Feb 12 | Feb 7 | Jan 31 | Jan 23 | Jan 16 | Jan 7 | Dec 31 |
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 17 | Oct 30 | Nov 12 |
| Freeze (32°F) | Oct 25 | Nov 9 | Nov 23 |
| Hard (28°F) | Nov 2 | Nov 19 | Dec 5 |
| Severe (24°F) | Nov 13 | Nov 29 | Dec 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 17 | Oct 20 | Oct 24 | Oct 27 | Oct 30 | Nov 2 | Nov 5 | Nov 8 | Nov 12 |
| 32°F | Oct 25 | Oct 30 | Nov 3 | Nov 6 | Nov 9 | Nov 11 | Nov 14 | Nov 18 | Nov 23 |
| 28°F | Nov 2 | Nov 9 | Nov 12 | Nov 16 | Nov 19 | Nov 23 | Nov 26 | Dec 1 | Dec 5 |
| 24°F | Nov 13 | Nov 18 | Nov 23 | Nov 26 | Nov 29 | Dec 3 | Dec 7 | Dec 12 | Dec 20 |
| 20°F | Nov 23 | Nov 29 | Dec 3 | Dec 8 | Dec 14 | Dec 20 | Dec 27 | Jan 4 | Jan 13 |
| 16°F | Dec 2 | Dec 9 | Dec 16 | Dec 22 | Dec 29 | Jan 4 | Jan 10 | Jan 19 | 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: Post, Tx, about 6.2 miles away@if(!empty($station['elevation_ft'])), at 2,611 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 Post, TX?
On average, the last spring frost (32°F) around Post, TX is about Apr 1. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 10.
When is the first frost in the fall?
The first fall frost around Post, TX typically arrives about Nov 9. 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 1 on average, or Mar 10 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 79356 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026