USDA Hardiness Zone 9a
Frost Dates for 77957 — Edna, Texas
NOAA 1991–2020 normals from Victoria Regional Airport, TX (115 ft), 18 miles southwest.
Updated
In Edna, the last spring frost (32°F) is around February 18 in half of years and has passed by March 14 in nine years out of ten. The first fall frost comes around December 4, as early as November 16 one year in ten, leaving a typical freeze-free season of 291 days (NOAA, Victoria Regional Airport, TX).
- Last spring frost
- February 18
- First fall frost
- December 4
- Growing season
- 291 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 15 observed
NOAA normal
Frost risk by date in Edna
Half of springs at Victoria Regional Airport, TX see their last 32°F night by February 18; only one in ten is past it by January 19, and one in ten still has one after March 14. Planting tender crops after March 1 leaves a 30% risk of a frost on them, after March 7 20%, and after March 14 10%. The 24 days between the even-odds date and the one-in-ten date is wider than at 76% of the 339 Texas stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.
In fall the first 32°F night comes by December 4 in half of years, as early as November 16 one year in ten, and holds off past January 4 one year in ten. A hard freeze of 28°F follows 17 days later, around December 21; in spring the one-in-ten date for 28°F is March 1, 13 days before the 32°F one. The freeze-free season lasts 291 days in a typical year, longer than at 83% of the 339 Texas stations; it reaches 330 days one year in ten and falls short of 258 one year in ten. On average 9 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 16 days longer, to about March 6, and return around November 21. A 24°F night is unusual: 46% of winters had one.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Feb 9 | Feb 18 | Feb 25 | Mar 1 | Mar 6 | Mar 10 | Mar 14 | Mar 18 | Mar 26 |
| 32°F | Jan 19 | Jan 28 | Feb 3 | Feb 12 | Feb 18 | Feb 25 | Mar 1 | Mar 7 | Mar 14 |
| 28°F87% of yrs | Dec 18 | Dec 31 | Jan 9 | Jan 18 | Jan 25 | Jan 31 | Feb 8 | Feb 20 | Mar 1 |
| 24°F46% of yrs | too rare for a date | ||||||||
| 20°F12% of yrs | too rare for a date | ||||||||
| 16°F1% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 4 | Nov 10 | Nov 14 | Nov 18 | Nov 21 | Nov 24 | Nov 29 | Dec 3 | Dec 10 |
| 32°F | Nov 16 | Nov 21 | Nov 26 | Dec 1 | Dec 4 | Dec 8 | Dec 15 | Dec 25 | Jan 4 |
| 28°F87% of yrs | Nov 27 | Dec 3 | Dec 8 | Dec 14 | Dec 21 | Dec 29 | Jan 4 | Jan 11 | Jan 30 |
| 24°F46% of yrs | too rare for a date | ||||||||
| 20°F12% of yrs | too rare for a date | ||||||||
| 16°F1% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Victoria Regional Airport, 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 77957 →Compare Edna with another place →
Weather by month in Edna
August is the warmest month at Victoria Regional Airport, TX, averaging 96°F by day and 74°F at night; January is the coldest at 65°F and 44°F. From April to October the chance of a 32°F night stays under 10% each month. In spring, February still brings one in 60% of years and March still brings one in 32% of years.
Warmth for growing adds up to 7,736 growing degree days a year (base 50°F), more than at 84% of the 351 Texas stations. 43% of them (3,346) have built up by the end of June, and August adds the most, 1,079. Precipitation totals 40.4 inches a year, most in May (5.2") and least in February (2.0"); May to September bring 51% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 65 | 44 | 2.7 | 82% | 3 | 193 |
| Feb | 69 | 48 | 2.0 | 60% | 2 | 260 |
| Mar | 75 | 54 | 3.0 | 32% | 1 | 455 |
| Apr | 81 | 60 | 3.0 | 0% | 0 | 612 |
| May | 87 | 68 | 5.2 | 0% | 0 | 845 |
| Jun | 92 | 73 | 4.2 | 0% | 0 | 981 |
| Jul | 95 | 75 | 3.5 | 0% | 0 | 1071 |
| Aug | 96 | 74 | 3.1 | 0% | 0 | 1079 |
| Sep | 91 | 70 | 4.5 | 0% | 0 | 910 |
| Oct | 84 | 61 | 4.0 | 1% | <1 | 699 |
| Nov | 74 | 51 | 2.9 | 39% | 1 | 394 |
| Dec | 67 | 45 | 2.3 | 76% | 3 | 237 |
Monthly normals 1991–2020 at Victoria Regional Airport, TX (115 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, Victoria Regional Airport, TX, 18 miles southwest of Edna, has a last frost 14 days earlier (February 4), a first frost 5 days later (December 9), a season 18 days longer.
When it snows in Edna, Texas
Measurable snow is rare here: only 0 of 15 winters from 1991 to 2020 recorded 0.1 inch or more at Edna 7 NW, TX, 9.4 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 77957
| When | What to do |
|---|---|
| December 10 – December 24 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| December 24 – January 7 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| January 21 – February 4 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| February 18 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by September 11 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 20 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| December 4 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 77957 is 18 miles from Victoria Regional Airport, TX, which stands at 115 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 77957 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.