USDA Hardiness Zone 8b
Frost Dates for 29810 — Allendale, South Carolina
NOAA 1991–2020 normals from Allendale 2 NW, SC (180 ft), under a mile northeast.
Updated
In Allendale, the last spring frost (32°F) is around March 28 in half of years and has passed by April 13 in nine years out of ten. The first fall frost comes around November 7, as early as October 23 one year in ten, leaving a typical freeze-free season of 224 days (NOAA, Allendale 2 NW, SC).
- Last spring frost
- March 28
- First fall frost
- November 7
- Growing season
- 224 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
- 11%
- Snow per year
- —
median, 1991–2020
median, 1991–2020
2 of 19 observed
NOAA normal
Frost risk by date in Allendale
Half of springs at Allendale 2 NW, SC see their last 32°F night by March 28; only one in ten is past it by March 8, and one in ten still has one after April 13. Planting tender crops after April 3 leaves a 30% risk of a frost on them, after April 6 20%, and after April 13 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 44% of the 105 South Carolina stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 7 in half of years, as early as October 23 one year in ten, and holds off past November 23 one year in ten. A hard freeze of 28°F follows 12 days later, around November 19; in spring the one-in-ten date for 28°F is April 1, 12 days before the 32°F one. The freeze-free season lasts 224 days in a typical year, shorter than at 67% of the 105 South Carolina stations; it reaches 249 days one year in ten and falls short of 201 one year in ten. On average 57 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 11 days longer, to about April 8, and return around October 30. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 55%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 24 | Mar 30 | Apr 2 | Apr 5 | Apr 8 | Apr 11 | Apr 15 | Apr 19 | Apr 26 |
| 32°F | Mar 8 | Mar 15 | Mar 20 | Mar 24 | Mar 28 | Mar 31 | Apr 3 | Apr 6 | Apr 13 |
| 28°F | Feb 20 | Feb 28 | Mar 4 | Mar 8 | Mar 13 | Mar 17 | Mar 21 | Mar 26 | Apr 1 |
| 24°F | Jan 27 | Feb 3 | Feb 11 | Feb 19 | Feb 25 | Feb 28 | Mar 6 | Mar 12 | Mar 19 |
| 20°F91% of yrs | Dec 31 | Jan 14 | Jan 24 | Jan 31 | Feb 4 | Feb 11 | Feb 20 | Feb 27 | Mar 7 |
| 16°F55% of yrs | Dec 20 | Dec 31 | Jan 9 | Jan 14 | Jan 21 | Jan 28 | Jan 31 | Feb 7 | Feb 25 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 14 | Oct 20 | Oct 24 | Oct 27 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 11 |
| 32°F | Oct 23 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 10 | Nov 13 | Nov 18 | Nov 23 |
| 28°F | Nov 3 | Nov 8 | Nov 12 | Nov 16 | Nov 19 | Nov 22 | Nov 27 | Dec 2 | Dec 8 |
| 24°F | Nov 12 | Nov 19 | Nov 25 | Nov 30 | Dec 3 | Dec 8 | Dec 15 | Dec 25 | Jan 3 |
| 20°F91% of yrs | Nov 27 | Dec 5 | Dec 11 | Dec 20 | Dec 27 | Jan 1 | Jan 7 | Jan 16 | Jan 30 |
| 16°F55% of yrs | Dec 9 | Dec 17 | Dec 25 | Jan 1 | Jan 6 | Jan 11 | Jan 18 | Jan 28 | Feb 5 |
Freeze probabilities 1991–2020 at Allendale 2 NW, SC, 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 29810 →Compare Allendale with another place →
Weather by month in Allendale
July is the warmest month at Allendale 2 NW, SC, averaging 92°F by day and 69°F at night; January is the coldest at 59°F and 33°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 39% of years.
Warmth for growing adds up to 5,479 growing degree days a year (base 50°F), more than at 57% of the 105 South Carolina stations. 40% of them (2,192) have built up by the end of June, and July adds the most, 945. Precipitation totals 49.0 inches a year, most in August (5.6") and least in April (3.1"); May to September bring 48% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 59 | 33 | 4.0 | 100% | 16 | 66 |
| Feb | 62 | 36 | 3.7 | 98% | 12 | 83 |
| Mar | 69 | 42 | 4.0 | 94% | 6 | 212 |
| Apr | 76 | 49 | 3.1 | 39% | 1 | 382 |
| May | 83 | 58 | 3.6 | 0% | 0 | 631 |
| Jun | 89 | 66 | 4.8 | 0% | 0 | 819 |
| Jul | 92 | 69 | 5.5 | 0% | 0 | 945 |
| Aug | 89 | 69 | 5.6 | 0% | 0 | 899 |
| Sep | 85 | 63 | 4.2 | 0% | 0 | 718 |
| Oct | 77 | 52 | 3.4 | 25% | 1 | 453 |
| Nov | 69 | 40 | 3.2 | 95% | 8 | 186 |
| Dec | 61 | 35 | 3.9 | 99% | 14 | 85 |
Monthly normals 1991–2020 at Allendale 2 NW, SC (180 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, Hampton 1S, SC, 17 miles southeast of Allendale, has a last frost 22 days earlier (March 6), a first frost 19 days later (November 26), a season 43 days longer.
When it snows in Allendale, South Carolina
Measurable snow is rare here: only 2 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Allendale 2 NW, SC, 0.9 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 29810
| When | What to do |
|---|---|
| January 17 – January 31 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 31 – February 14 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 28 – March 14 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 28 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 15 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 24 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 7 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 29810 is under a mile from Allendale 2 NW, SC, which stands at 180 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 29827 (Fairfax). The 2023 USDA Plant Hardiness Zone Map lists ZIP 29810 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.
Frost dates across South Carolina →
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.