USDA Hardiness Zone 8b
Frost Dates for 75684 — Overton, Texas
NOAA 1991–2020 normals from Henderson, TX (420 ft), 11 miles southeast.
Updated
In Overton, the last spring frost (32°F) is around March 15 in half of years and has passed by April 3 in nine years out of ten. The first fall frost comes around November 16, as early as November 1 one year in ten, leaving a typical freeze-free season of 247 days (NOAA, Henderson, TX).
- Last spring frost
- March 15
- First fall frost
- November 16
- Growing season
- 247 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
- 38%
- Snow per year
- 0.6"
median, 1991–2020
median, 1991–2020
9 of 24 observed
NOAA normal
Frost risk by date in Overton
Half of springs at Henderson, TX see their last 32°F night by March 15; only one in ten is past it by February 24, and one in ten still has one after April 3. Planting tender crops after March 23 leaves a 30% risk of a frost on them, after March 27 20%, and after April 3 10%. The 19 days between the even-odds date and the one-in-ten date is narrower than at 63% of the 339 Texas stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 16 in half of years, as early as November 1 one year in ten, and holds off past December 5 one year in ten. A hard freeze of 28°F follows 13 days later, around November 29; in spring the one-in-ten date for 28°F is March 21, 13 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 275 days one year in ten and falls short of 220 one year in ten. On average 41 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 14 days longer, to about March 29, and return around November 5. Nights of 24°F, cold enough to damage hardier plants, come in 97% of winters and 16°F in 29%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 7 | Mar 15 | Mar 20 | Mar 25 | Mar 29 | Apr 1 | Apr 5 | Apr 9 | Apr 16 |
| 32°F | Feb 24 | Mar 2 | Mar 5 | Mar 10 | Mar 15 | Mar 19 | Mar 23 | Mar 27 | Apr 3 |
| 28°F | Jan 31 | Feb 13 | Feb 20 | Feb 25 | Mar 1 | Mar 5 | Mar 9 | Mar 14 | Mar 21 |
| 24°F97% of yrs | Jan 9 | Jan 20 | Jan 29 | Feb 3 | Feb 9 | Feb 17 | Feb 25 | Mar 3 | Mar 9 |
| 20°F71% of yrs | Dec 21 | Jan 3 | Jan 10 | Jan 18 | Jan 26 | Feb 1 | Feb 5 | Feb 14 | Mar 1 |
| 16°F29% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 24 | Oct 29 | Oct 31 | Nov 2 | Nov 5 | Nov 8 | Nov 12 | Nov 16 | Nov 22 |
| 32°F | Nov 1 | Nov 5 | Nov 8 | Nov 12 | Nov 16 | Nov 20 | Nov 25 | Dec 1 | Dec 5 |
| 28°F | Nov 8 | Nov 14 | Nov 20 | Nov 25 | Nov 29 | Dec 3 | Dec 8 | Dec 15 | Dec 26 |
| 24°F97% of yrs | Nov 19 | Nov 27 | Dec 2 | Dec 8 | Dec 18 | Dec 25 | Jan 1 | Jan 7 | Jan 18 |
| 20°F71% of yrs | Nov 30 | Dec 11 | Dec 22 | Dec 30 | Jan 3 | Jan 8 | Jan 14 | Jan 23 | Feb 3 |
| 16°F29% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Henderson, 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 75684 →Compare Overton with another place →
Weather by month in Overton
August is the warmest month at Henderson, TX, averaging 95°F by day and 71°F at night; January is the coldest at 59°F and 36°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From May to October the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 80% of years and April still brings one in 14% of years.
Warmth for growing adds up to 6,234 growing degree days a year (base 50°F), fewer than at 57% of the 351 Texas stations. 40% of them (2,511) have built up by the end of June, and August adds the most, 1,029. Precipitation totals 50.4 inches a year, most in June (4.8") and least in July (3.4"); May to September bring 40% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 59 | 36 | 4.1 | 99% | 14 | 83 |
| Feb | 63 | 39 | 4.1 | 94% | 9 | 119 |
| Mar | 70 | 45 | 4.6 | 80% | 3 | 272 |
| Apr | 77 | 53 | 4.4 | 14% | <1 | 447 |
| May | 84 | 62 | 4.7 | 0% | 0 | 702 |
| Jun | 90 | 69 | 4.8 | 0% | 0 | 889 |
| Jul | 94 | 72 | 3.4 | 0% | 0 | 1018 |
| Aug | 95 | 71 | 3.6 | 0% | 0 | 1029 |
| Sep | 89 | 65 | 3.8 | 0% | 0 | 817 |
| Oct | 80 | 54 | 4.2 | 10% | <1 | 524 |
| Nov | 68 | 44 | 4.1 | 79% | 5 | 231 |
| Dec | 61 | 38 | 4.6 | 99% | 11 | 104 |
Monthly normals 1991–2020 at Henderson, TX (420 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, Longview E Tx Regional Airport, TX, 16 miles northeast of Overton, has a last frost 7 days earlier (March 8), a first frost 1 day later (November 17), a season 4 days longer.
When it snows in Overton, Texas
Measurable snow is rare here: only 9 of 24 winters from 1991 to 2020 recorded 0.1 inch or more at Henderson, TX, 10.8 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 75684
| When | What to do |
|---|---|
| January 4 – January 18 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 18 – February 1 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 15 – March 1 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 15 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 24 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by November 2 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 16 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 75684 is 11 miles from Henderson, TX, which stands at 420 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 75652 (Henderson). The 2023 USDA Plant Hardiness Zone Map lists ZIP 75684 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.