USDA Hardiness Zone 9a
Frost Dates for 75941 — Diboll, Texas
NOAA 1991–2020 normals from Lufkin Angelina Co Airport, TX (288 ft), 3 miles northeast.
Updated
In Diboll, the last spring frost (32°F) is around March 11 in half of years and has passed by April 4 in nine years out of ten. The first fall frost comes around November 15, as early as October 30 one year in ten, leaving a typical freeze-free season of 247 days (NOAA, Lufkin Angelina Co Airport, TX).
- Last spring frost
- March 11
- First fall frost
- November 15
- Growing season
- 247 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
- 24%
- Snow per year
- 0.3"
median, 1991–2020
median, 1991–2020
6 of 25 observed
NOAA normal
Frost risk by date in Diboll
Half of springs at Lufkin Angelina Co Airport, TX see their last 32°F night by March 11; only one in ten is past it by February 17, and one in ten still has one after April 4. Planting tender crops after March 22 leaves a 30% risk of a frost on them, after March 28 20%, and after April 4 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 November 15 in half of years, as early as October 30 one year in ten, and holds off past December 4 one year in ten. A hard freeze of 28°F follows 13 days later, around November 28; in spring the one-in-ten date for 28°F is March 17, 18 days before the 32°F one. The freeze-free season lasts 247 days in a typical year, shorter than at 51% of the 339 Texas stations; it reaches 276 days one year in ten and falls short of 219 one year in ten. On average 28 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 17 days longer, to about March 28, and return around November 4. Nights of 24°F, cold enough to damage hardier plants, come in 93% of winters and 16°F in 20%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 4 | Mar 12 | Mar 18 | Mar 23 | Mar 28 | Apr 2 | Apr 5 | Apr 9 | Apr 16 |
| 32°F | Feb 17 | Feb 26 | Mar 2 | Mar 6 | Mar 11 | Mar 16 | Mar 22 | Mar 28 | Apr 4 |
| 28°F | Jan 27 | Feb 3 | Feb 11 | Feb 19 | Feb 25 | Mar 1 | Mar 5 | Mar 10 | Mar 17 |
| 24°F93% of yrs | Dec 31 | Jan 14 | Jan 22 | Jan 29 | Feb 2 | Feb 9 | Feb 18 | Feb 27 | Mar 6 |
| 20°F59% of yrs | Dec 19 | Dec 31 | Jan 6 | Jan 12 | Jan 18 | Jan 26 | Jan 31 | Feb 8 | Feb 23 |
| 16°F20% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 22 | Oct 26 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 11 | Nov 14 | Nov 20 |
| 32°F | Oct 30 | Nov 3 | Nov 7 | Nov 11 | Nov 15 | Nov 19 | Nov 23 | Nov 29 | Dec 4 |
| 28°F | Nov 6 | Nov 13 | Nov 19 | Nov 23 | Nov 28 | Dec 2 | Dec 7 | Dec 15 | Dec 27 |
| 24°F93% of yrs | Nov 22 | Nov 29 | Dec 4 | Dec 10 | Dec 21 | Dec 28 | Jan 3 | Jan 9 | Jan 21 |
| 20°F59% of yrs | Dec 4 | Dec 14 | Dec 25 | Dec 31 | Jan 3 | Jan 6 | Jan 11 | Jan 20 | Feb 4 |
| 16°F20% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Lufkin Angelina Co 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 75941 →Compare Diboll with another place →
Weather by month in Diboll
July is the warmest month at Lufkin Angelina Co Airport, TX, averaging 93°F by day and 72°F at night; January is the coldest at 60°F and 38°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 68% of years and April still brings one in 15% of years.
Warmth for growing adds up to 6,418 growing degree days a year (base 50°F), more than at 51% of the 351 Texas stations. 42% of them (2,673) have built up by the end of June, and July adds the most, 1,007. Precipitation totals 50.2 inches a year, most in January (4.7") and least in July (3.3"); May to September bring 39% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 60 | 38 | 4.7 | 99% | 10 | 99 |
| Feb | 64 | 42 | 3.9 | 92% | 5 | 149 |
| Mar | 71 | 48 | 4.2 | 68% | 2 | 312 |
| Apr | 78 | 54 | 3.7 | 15% | <1 | 482 |
| May | 85 | 63 | 4.6 | 0% | 0 | 736 |
| Jun | 90 | 69 | 4.2 | 0% | 0 | 895 |
| Jul | 93 | 72 | 3.3 | 0% | 0 | 1007 |
| Aug | 94 | 71 | 3.8 | 0% | 0 | 1004 |
| Sep | 89 | 66 | 3.9 | 0% | 0 | 819 |
| Oct | 80 | 55 | 4.7 | 12% | <1 | 542 |
| Nov | 69 | 45 | 4.5 | 79% | 3 | 249 |
| Dec | 61 | 39 | 4.7 | 99% | 8 | 123 |
Monthly normals 1991–2020 at Lufkin Angelina Co Airport, TX (288 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, Lufkin 11 NW, TX, 17 miles northwest of Diboll, has a last frost 8 days later (March 19), a first frost 5 days earlier (November 10), a season 8 days shorter.
When it snows in Diboll, Texas
Measurable snow is rare here: only 6 of 25 winters from 1991 to 2020 recorded 0.1 inch or more at Lufkin #2, TX, 10.4 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 75941
| When | What to do |
|---|---|
| December 31 – January 14 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 14 – January 28 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 11 – February 25 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 11 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 23 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 1 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 15 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 75941 is 3 miles from Lufkin Angelina Co Airport, TX, which stands at 288 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 4 other ZIP codes share the station; its figures are presented in full for 75904 (Lufkin). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75941 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.