USDA Hardiness Zone 9a
Frost Dates for 79845 — Presidio, Texas
NOAA 1991–2020 normals from Presidio, TX (2,610 ft), 6 miles west.
Updated
In Presidio, the last spring frost (32°F) is around February 23 in half of years and has passed by March 13 in nine years out of ten. The first fall frost comes around November 26, as early as November 9 one year in ten, leaving a typical freeze-free season of 275 days (NOAA, Presidio, TX).
- Last spring frost
- February 23
- First fall frost
- November 26
- Growing season
- 275 days
- Hardiness zone
- 9a
50% probability
50% probability
freeze-free, 50%
20 to 25°F (-6.7 to -3.9°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 0%
- Snow per year
- 0"
median, 1991–2020
median, 1991–2020
0 of 19 observed
NOAA normal
Frost risk by date in Presidio
Half of springs at Presidio, TX see their last 32°F night by February 23; only one in ten is past it by February 3, and one in ten still has one after March 13. Planting tender crops after March 4 leaves a 30% risk of a frost on them, after March 7 20%, and after March 13 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 26 in half of years, as early as November 9 one year in ten, and holds off past December 9 one year in ten. A hard freeze of 28°F follows 9 days later, around December 5; in spring the one-in-ten date for 28°F is February 27, 14 days before the 32°F one. The freeze-free season lasts 275 days in a typical year, longer than at 75% of the 339 Texas stations; it reaches 300 days one year in ten and falls short of 251 one year in ten. On average 25 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 12 days longer, to about March 7, and return around November 16. Nights of 24°F, cold enough to damage hardier plants, come in 93% of winters and 16°F in 21%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Feb 19 | Feb 26 | Mar 2 | Mar 5 | Mar 7 | Mar 10 | Mar 13 | Mar 17 | Mar 24 |
| 32°F | Feb 3 | Feb 8 | Feb 14 | Feb 18 | Feb 23 | Feb 28 | Mar 4 | Mar 7 | Mar 13 |
| 28°F | Jan 17 | Jan 24 | Jan 29 | Jan 31 | Feb 3 | Feb 7 | Feb 12 | Feb 19 | Feb 27 |
| 24°F93% of yrs | Dec 25 | Jan 2 | Jan 8 | Jan 14 | Jan 20 | Jan 25 | Jan 28 | Feb 1 | Feb 9 |
| 20°F58% of yrs | Dec 15 | Dec 24 | Dec 29 | Jan 2 | Jan 6 | Jan 11 | Jan 17 | Jan 22 | Jan 31 |
| 16°F21% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 1 | Nov 6 | Nov 10 | Nov 14 | Nov 16 | Nov 20 | Nov 23 | Nov 26 | Dec 1 |
| 32°F | Nov 9 | Nov 15 | Nov 19 | Nov 23 | Nov 26 | Nov 29 | Dec 1 | Dec 4 | Dec 9 |
| 28°F | Nov 19 | Nov 25 | Nov 30 | Dec 2 | Dec 5 | Dec 7 | Dec 10 | Dec 15 | Dec 21 |
| 24°F93% of yrs | Dec 1 | Dec 6 | Dec 9 | Dec 12 | Dec 17 | Dec 20 | Dec 25 | Dec 31 | Jan 8 |
| 20°F58% of yrs | Dec 8 | Dec 13 | Dec 19 | Dec 23 | Dec 27 | Jan 1 | Jan 4 | Jan 10 | Jan 19 |
| 16°F21% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Presidio, 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 79845 →Compare Presidio with another place →
Weather by month in Presidio
June is the warmest month at Presidio, TX, averaging 103°F by day and 74°F at night; January is the coldest at 68°F and 34°F. A freezing night is all but certain in every month from December to January (a 90% chance or more). From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 88% of years and March still brings one in 38% of years.
Warmth for growing adds up to 8,053 growing degree days a year (base 50°F), more than at 89% of the 351 Texas stations. 45% of them (3,594) have built up by the end of June, and July adds the most, 1,181. Precipitation totals 8.9 inches a year, most in July (1.8") and least in April (0.2"); May to September bring 63% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 68 | 34 | 0.5 | 100% | 10 | 96 |
| Feb | 74 | 41 | 0.4 | 88% | 3 | 219 |
| Mar | 81 | 48 | 0.5 | 38% | 1 | 451 |
| Apr | 90 | 56 | 0.2 | 0% | 0 | 693 |
| May | 98 | 66 | 0.4 | 0% | 0 | 981 |
| Jun | 103 | 74 | 1.0 | 0% | 0 | 1153 |
| Jul | 101 | 75 | 1.8 | 0% | 0 | 1181 |
| Aug | 100 | 75 | 1.4 | 0% | 0 | 1165 |
| Sep | 95 | 69 | 1.0 | 0% | 0 | 959 |
| Oct | 88 | 58 | 0.7 | 2% | <1 | 715 |
| Nov | 77 | 45 | 0.5 | 66% | 2 | 335 |
| Dec | 68 | 35 | 0.5 | 99% | 10 | 104 |
Monthly normals 1991–2020 at Presidio, TX (2,610 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
When it snows in Presidio, Texas
Measurable snow is rare here: only 0 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Presidio, TX, 6.3 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 79845
| When | What to do |
|---|---|
| December 15 – December 29 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| December 29 – January 12 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| January 26 – February 9 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| February 23 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by September 3 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 12 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 26 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 79845 is 6 miles from Presidio, TX, which stands at 2,610 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 79845 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°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.