USDA Hardiness Zone 8a
Frost Dates for 79512 — Colorado City, Texas
NOAA 1991–2020 normals from Colorado City, TX (2,110 ft), 5 miles northeast.
Updated
In Colorado City, the last spring frost (32°F) is around April 4 in half of years and has passed by April 22 in nine years out of ten. The first fall frost comes around November 5, as early as October 22 one year in ten, leaving a typical freeze-free season of 216 days (NOAA, Colorado City, TX).
- Last spring frost
- April 4
- First fall frost
- November 5
- Growing season
- 216 days
- Hardiness zone
- 8a
50% probability
50% probability
freeze-free, 50%
10 to 15°F (-12.2 to -9.4°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 27%
- Snow per year
- 1.6"
median, 1991–2020
median, 1991–2020
4 of 15 observed
NOAA normal
Frost risk by date in Colorado City
Half of springs at Colorado City, TX see their last 32°F night by April 4; only one in ten is past it by March 13, and one in ten still has one after April 22. Planting tender crops after April 12 leaves a 30% risk of a frost on them, after April 17 20%, and after April 22 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 75% of the 339 Texas stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 5 in half of years, as early as October 22 one year in ten, and holds off past November 19 one year in ten. A hard freeze of 28°F follows 9 days later, around November 14; in spring the one-in-ten date for 28°F is April 11, 11 days before the 32°F one. The freeze-free season lasts 216 days in a typical year, shorter than at 88% of the 339 Texas stations; it reaches 240 days one year in ten and falls short of 193 one year in ten. On average 76 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 10 days longer, to about April 14, and return around October 28. Severe cold of 16°F or below comes in 94% of winters, usually between December 20 and February 7.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 26 | Apr 3 | Apr 8 | Apr 11 | Apr 14 | Apr 18 | Apr 20 | Apr 24 | Apr 29 |
| 32°F | Mar 13 | Mar 20 | Mar 26 | Mar 31 | Apr 4 | Apr 7 | Apr 12 | Apr 17 | Apr 22 |
| 28°F | Mar 2 | Mar 7 | Mar 11 | Mar 14 | Mar 18 | Mar 25 | Mar 31 | Apr 4 | Apr 11 |
| 24°F | Feb 15 | Feb 22 | Feb 27 | Mar 2 | Mar 5 | Mar 9 | Mar 12 | Mar 16 | Mar 27 |
| 20°F | Jan 28 | Feb 6 | Feb 13 | Feb 18 | Feb 23 | Feb 26 | Mar 1 | Mar 5 | Mar 11 |
| 16°F94% of yrs | Dec 31 | Jan 14 | Jan 25 | Feb 1 | Feb 7 | Feb 12 | Feb 17 | Feb 23 | Mar 2 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 14 | Oct 19 | Oct 22 | Oct 25 | Oct 28 | Oct 31 | Nov 2 | Nov 5 | Nov 9 |
| 32°F | Oct 22 | Oct 27 | Oct 31 | Nov 3 | Nov 5 | Nov 8 | Nov 10 | Nov 13 | Nov 19 |
| 28°F | Oct 31 | Nov 4 | Nov 8 | Nov 11 | Nov 14 | Nov 17 | Nov 20 | Nov 26 | Dec 1 |
| 24°F | Nov 8 | Nov 13 | Nov 17 | Nov 21 | Nov 24 | Nov 28 | Dec 1 | Dec 4 | Dec 9 |
| 20°F | Nov 18 | Nov 23 | Nov 27 | Dec 1 | Dec 4 | Dec 8 | Dec 11 | Dec 16 | Dec 24 |
| 16°F94% of yrs | Nov 27 | Dec 3 | Dec 9 | Dec 14 | Dec 20 | Dec 25 | Jan 1 | Jan 6 | Jan 22 |
Freeze probabilities 1991–2020 at Colorado City, TX, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 79512 →Compare Colorado City with another place →
Weather by month in Colorado City
July is the warmest month at Colorado City, TX, averaging 97°F by day and 71°F at night; January is the coldest at 58°F and 28°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 59% of years.
Warmth for growing adds up to 5,784 growing degree days a year (base 50°F), fewer than at 82% of the 351 Texas stations. 41% of them (2,347) have built up by the end of June, and July adds the most, 1,044. Precipitation totals 22.1 inches a year, most in June (3.1") and least in January (0.9"); May to September bring 55% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 58 | 28 | 0.9 | 100% | 22 | 26 |
| Feb | 62 | 31 | 1.3 | 100% | 15 | 65 |
| Mar | 70 | 40 | 1.7 | 98% | 7 | 222 |
| Apr | 81 | 47 | 1.5 | 59% | 1 | 416 |
| May | 87 | 59 | 2.2 | 1% | 0 | 721 |
| Jun | 93 | 67 | 3.1 | 0% | 0 | 898 |
| Jul | 97 | 71 | 2.0 | 0% | 0 | 1044 |
| Aug | 96 | 69 | 3.0 | 0% | 0 | 995 |
| Sep | 88 | 62 | 1.9 | 0% | 0 | 747 |
| Oct | 79 | 50 | 2.3 | 31% | 1 | 463 |
| Nov | 67 | 38 | 1.2 | 97% | 10 | 151 |
| Dec | 59 | 29 | 1.0 | 100% | 21 | 37 |
Monthly normals 1991–2020 at Colorado City, TX (2,110 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Snyder, TX, 24 miles north of Colorado City and 209 feet higher, has a last frost 8 days earlier (March 27), a first frost 5 days later (November 10), a season 11 days longer.
When it snows in Colorado City, Texas
Measurable snow is rare here: only 4 of 15 winters from 1991 to 2020 recorded 0.1 inch or more at Colorado City, TX, 4.9 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 79512
| When | What to do |
|---|---|
| January 24 – February 7 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 7 – February 21 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 7 – March 21 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 4 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 13 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 22 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 5 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 79512 is 5 miles from Colorado City, TX, which stands at 2,110 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 79512 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.