USDA Hardiness Zone 8b
Frost Dates for 75640 — Diana, Texas
NOAA 1991–2020 normals from Diana 2 W, TX (284 ft), 6 miles west.
Updated
In Diana, the last spring frost (32°F) is around March 10 in half of years and has passed by March 30 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 251 days (NOAA, Diana 2 W, TX).
- Last spring frost
- March 10
- First fall frost
- November 15
- Growing season
- 251 days
- Hardiness zone
- 8b
50% probability
50% probability
freeze-free, 50%
15 to 20°F (-9.4 to -6.7°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 13%
- Snow per year
- 0.4"
median, 1991–2020
median, 1991–2020
3 of 24 observed
NOAA normal
Frost risk by date in Diana
Half of springs at Diana 2 W, TX see their last 32°F night by March 10; only one in ten is past it by February 18, and one in ten still has one after March 30. Planting tender crops after March 17 leaves a 30% risk of a frost on them, after March 23 20%, and after March 30 10%. The 20 days between the even-odds date and the one-in-ten date is narrower than at 51% of the 339 Texas stations behind this site's ZIP pages.
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 14 days later, around November 29; in spring the one-in-ten date for 28°F is March 16, 14 days before the 32°F one. The freeze-free season lasts 251 days in a typical year, longer than at 53% of the 339 Texas stations; it reaches 278 days one year in ten and falls short of 223 one year in ten. On average 39 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 15 days longer, to about March 25, and return around November 4. Nights of 24°F, cold enough to damage hardier plants, come in 95% of winters and 16°F in 24%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 3 | Mar 11 | Mar 16 | Mar 21 | Mar 25 | Mar 29 | Apr 1 | Apr 5 | Apr 13 |
| 32°F | Feb 18 | Feb 26 | Mar 1 | Mar 5 | Mar 10 | Mar 14 | Mar 17 | Mar 23 | Mar 30 |
| 28°F | Jan 29 | Feb 7 | Feb 15 | Feb 22 | Feb 27 | Mar 2 | Mar 6 | Mar 11 | Mar 16 |
| 24°F95% of yrs | Jan 3 | Jan 16 | Jan 23 | Jan 30 | Feb 5 | Feb 12 | Feb 19 | Feb 28 | Mar 7 |
| 20°F67% of yrs | Dec 24 | Jan 2 | Jan 9 | Jan 16 | Jan 21 | Jan 26 | Jan 31 | Feb 9 | Feb 28 |
| 16°F24% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 20 | Oct 25 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 11 | Nov 15 | Nov 23 |
| 32°F | Oct 30 | Nov 3 | Nov 7 | Nov 11 | Nov 15 | Nov 19 | Nov 24 | Nov 30 | Dec 4 |
| 28°F | Nov 7 | Nov 14 | Nov 19 | Nov 24 | Nov 29 | Dec 3 | Dec 7 | Dec 13 | Dec 25 |
| 24°F95% of yrs | Nov 18 | Nov 27 | Dec 4 | Dec 10 | Dec 18 | Dec 25 | Jan 1 | Jan 8 | Jan 18 |
| 20°F67% of yrs | Dec 5 | Dec 15 | Dec 22 | Dec 29 | Jan 2 | Jan 6 | Jan 13 | Jan 19 | Feb 1 |
| 16°F24% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Diana 2 W, 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 75640 →Compare Diana with another place →
Compared with the next station
The nearest other station, Daingerfield 9 S, TX, 14 miles north of Diana, has a last frost 2 days earlier (March 8), a first frost 7 days later (November 22), a season 8 days longer.
When it snows in Diana, Texas
Measurable snow is rare here: only 3 of 24 winters from 1991 to 2020 recorded 0.1 inch or more at Daingerfield 9 S, TX, 13.7 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 75640
| When | What to do |
|---|---|
| December 30 – January 13 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 13 – January 27 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 10 – February 24 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 10 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 75640 is 6 miles from Diana 2 W, TX, which stands at 284 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 75645 (Gilmer). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75640 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°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.