USDA Hardiness Zone 8b
Frost Dates for 75401 — Greenville, Texas
NOAA 1991–2020 normals from Greenville Kgvl Radio, TX (545 ft), 2 miles northeast.
Updated
In Greenville, the last spring frost (32°F) is around March 18 in half of years and has passed by April 6 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 244 days (NOAA, Greenville Kgvl Radio, TX).
- Last spring frost
- March 18
- First fall frost
- November 16
- Growing season
- 244 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
- 17%
- Snow per year
- 0.1"
median, 1991–2020
median, 1991–2020
3 of 18 observed
NOAA normal
Frost risk by date in Greenville
Half of springs at Greenville Kgvl Radio, TX see their last 32°F night by March 18; only one in ten is past it by February 27, and one in ten still has one after April 6. Planting tender crops after March 26 leaves a 30% risk of a frost on them, after March 31 20%, and after April 6 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 12 days later, around November 28; in spring the one-in-ten date for 28°F is March 23, 14 days before the 32°F one. The freeze-free season lasts 244 days in a typical year, shorter than at 55% of the 339 Texas stations; it reaches 268 days one year in ten and falls short of 215 one year in ten. On average 50 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 April 1, and return around November 5. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 56%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 13 | Mar 19 | Mar 23 | Mar 29 | Apr 1 | Apr 4 | Apr 9 | Apr 15 | Apr 23 |
| 32°F | Feb 27 | Mar 5 | Mar 9 | Mar 14 | Mar 18 | Mar 21 | Mar 26 | Mar 31 | Apr 6 |
| 28°F | Feb 10 | Feb 18 | Feb 25 | Mar 1 | Mar 4 | Mar 8 | Mar 12 | Mar 16 | Mar 23 |
| 24°F99% of yrs | Jan 19 | Jan 29 | Feb 5 | Feb 11 | Feb 18 | Feb 25 | Mar 2 | Mar 6 | Mar 13 |
| 20°F86% of yrs | Dec 31 | Jan 12 | Jan 21 | Jan 27 | Jan 31 | Feb 6 | Feb 14 | Feb 24 | Mar 3 |
| 16°F56% of yrs | Dec 21 | Jan 1 | Jan 8 | Jan 15 | Jan 21 | Jan 29 | Feb 2 | Feb 8 | Feb 20 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 22 | Oct 27 | Oct 31 | Nov 3 | Nov 5 | Nov 8 | Nov 12 | Nov 16 | Nov 22 |
| 32°F | Nov 1 | Nov 5 | Nov 8 | Nov 12 | Nov 16 | Nov 19 | Nov 24 | Nov 29 | Dec 5 |
| 28°F | Nov 7 | Nov 13 | Nov 19 | Nov 24 | Nov 28 | Dec 1 | Dec 5 | Dec 10 | Dec 18 |
| 24°F99% of yrs | Nov 19 | Nov 27 | Dec 1 | Dec 7 | Dec 12 | Dec 18 | Dec 25 | Jan 2 | Jan 12 |
| 20°F86% of yrs | Dec 1 | Dec 10 | Dec 17 | Dec 24 | Jan 1 | Jan 4 | Jan 12 | Jan 21 | Feb 2 |
| 16°F56% of yrs | Dec 12 | Dec 19 | Dec 28 | Jan 1 | Jan 5 | Jan 11 | Jan 19 | Jan 29 | Feb 7 |
Freeze probabilities 1991–2020 at Greenville Kgvl Radio, 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 75401 →Compare Greenville with another place →
Frost risk through the year in Greenville
In Greenville, the spring curve drops under 10% on April 6 and the fall curve passes 10% on November 1, 209 days later; that gap is longer than at 56% of the 275 Texas stations with frost dates. The spring risk falls from 90% to 10% over 38 days (February 27 to April 6) and the fall risk climbs from 10% to 90% over 34 days (November 1 to December 5): both ends of the season vary about as much. At Lavon Dam, TX, 23 miles west, the same gap runs from March 31 to November 1, 6 days longer.
| Planted on | Another 32°F night | 28°F night |
|---|---|---|
| Mar 4 | 82% | 50% |
| Mar 11 | 66% | 33% |
| Mar 1850% date | 50% | 17% |
| Mar 25 | 32% | under 10% |
| Apr 1 | 18% | under 10% |
| Apr 8 | under 10% | under 10% |
Weather by month in Greenville
August is the warmest month at Greenville Kgvl Radio, TX, averaging 98°F by day and 73°F at night; January is the coldest at 58°F and 33°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 85% of years and April still brings one in 19% of years.
Warmth for growing adds up to 6,444 growing degree days a year (base 50°F), more than at 53% of the 351 Texas stations. 39% of them (2,531) have built up by the end of June, and August adds the most, 1,110. Precipitation totals 47.2 inches a year, most in May (5.8") and least in August (2.4"); May to September bring 41% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 58 | 33 | 3.2 | 100% | 17 | 64 |
| Feb | 62 | 37 | 3.5 | 98% | 10 | 104 |
| Mar | 69 | 44 | 4.4 | 85% | 4 | 252 |
| Apr | 77 | 52 | 4.1 | 19% | <1 | 448 |
| May | 85 | 62 | 5.8 | 0% | <1 | 721 |
| Jun | 93 | 70 | 4.2 | 0% | 0 | 942 |
| Jul | 97 | 74 | 3.2 | 0% | 0 | 1104 |
| Aug | 98 | 73 | 2.4 | 0% | 0 | 1110 |
| Sep | 91 | 66 | 3.8 | 0% | 0 | 853 |
| Oct | 81 | 54 | 5.0 | 10% | <1 | 541 |
| Nov | 68 | 43 | 3.6 | 81% | 5 | 224 |
| Dec | 60 | 36 | 4.0 | 100% | 14 | 82 |
Monthly normals 1991–2020 at Greenville Kgvl Radio, TX (545 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, Lavon Dam, TX, 23 miles west of Greenville, has a last frost 8 days earlier (March 10), a first frost 3 days later (November 19), a season 10 days longer.
When it snows in Greenville, Texas
Measurable snow is rare here: only 3 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Greenville Kgvl Radio, TX, 1.5 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 75401
| When | What to do |
|---|---|
| January 7 – January 21 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 21 – February 4 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 18 – March 4 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 18 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 75401 is 2 miles from Greenville Kgvl Radio, TX, which stands at 545 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 7 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 75401 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.