Last spring frost
Mar 27
Frost Dates for Chillicothe, TX
First fall frost
Nov 9
Growing season
225 days
Hardiness zone
7b
In an average year around Chillicothe, TX, the last spring frost (32°F) is about Mar 27 and the first fall frost is about Nov 9, giving roughly a 225-day growing season. To be safe most years, wait until Mar 5 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 9 | Mar 23 |
| Freeze (32°F) | Apr 15 | Mar 27 | Mar 5 |
| Hard (28°F) | Mar 31 | Mar 9 | Feb 22 |
| Severe (24°F) | Mar 16 | Feb 28 | Feb 7 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 26 | Apr 21 | Apr 17 | Apr 13 | Apr 9 | Apr 6 | Apr 2 | Mar 31 | Mar 23 |
| 32°F | Apr 15 | Apr 7 | Apr 3 | Mar 31 | Mar 27 | Mar 23 | Mar 18 | Mar 12 | Mar 5 |
| 28°F | Mar 31 | Mar 24 | Mar 18 | Mar 13 | Mar 9 | Mar 6 | Mar 2 | Feb 27 | Feb 22 |
| 24°F | Mar 16 | Mar 10 | Mar 6 | Mar 3 | Feb 28 | Feb 25 | Feb 20 | Feb 15 | Feb 7 |
| 20°F | Mar 7 | Mar 2 | Feb 26 | Feb 22 | Feb 17 | Feb 11 | Feb 6 | Jan 30 | Jan 18 |
| 16°F | Mar 1 | Feb 23 | Feb 15 | Feb 10 | Feb 3 | Jan 28 | Jan 20 | Jan 9 | Dec 26 |
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 16 | Nov 1 | Nov 14 |
| Freeze (32°F) | Oct 24 | Nov 9 | Nov 24 |
| Hard (28°F) | Nov 1 | Nov 18 | Dec 5 |
| Severe (24°F) | Nov 12 | Nov 30 | Dec 19 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 16 | Oct 22 | Oct 26 | Oct 29 | Nov 1 | Nov 3 | Nov 5 | Nov 9 | Nov 14 |
| 32°F | Oct 24 | Oct 30 | Nov 3 | Nov 6 | Nov 9 | Nov 12 | Nov 15 | Nov 20 | Nov 24 |
| 28°F | Nov 1 | Nov 7 | Nov 11 | Nov 15 | Nov 18 | Nov 22 | Nov 26 | Nov 30 | Dec 5 |
| 24°F | Nov 12 | Nov 17 | Nov 22 | Nov 26 | Nov 30 | Dec 3 | Dec 7 | Dec 13 | Dec 19 |
| 20°F | Nov 23 | Nov 29 | Dec 4 | Dec 9 | Dec 14 | Dec 18 | Dec 23 | Jan 1 | Jan 10 |
| 16°F | Dec 3 | Dec 10 | Dec 16 | Dec 21 | Dec 26 | Jan 4 | Jan 10 | Jan 19 | Jan 31 |
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: Vernon, Tx, about 12.4 miles away@if(!empty($station['elevation_ft'])), at 1,210 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 Chillicothe, TX?
On average, the last spring frost (32°F) around Chillicothe, TX is about Mar 27. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 5.
When is the first frost in the fall?
The first fall frost around Chillicothe, 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 Mar 27 on average, or Mar 5 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 225 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 79225 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026