USDA Hardiness Zone 8b
Frost Dates for 28530 — Grifton, North Carolina
NOAA 1991–2020 normals from Kinston Ag Rsch, NC (60 ft), 10 miles southwest.
Updated
In Grifton, the last spring frost (32°F) is around March 25 in half of years and has passed by April 7 in nine years out of ten. The first fall frost comes around November 11, as early as October 29 one year in ten, leaving a typical freeze-free season of 232 days (NOAA, Kinston Ag Rsch, NC).
- Last spring frost
- March 25
- First fall frost
- November 11
- Growing season
- 232 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
- 0.7"
median, 1991–2020
median, 1991–2020
3 of 23 observed
NOAA normal
Frost risk by date in Grifton
Half of springs at Kinston Ag Rsch, NC see their last 32°F night by March 25; only one in ten is past it by March 9, and one in ten still has one after April 7. Planting tender crops after March 31 leaves a 30% risk of a frost on them, after April 3 20%, and after April 7 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 92% of the 173 North Carolina stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 11 in half of years, as early as October 29 one year in ten, and holds off past December 2 one year in ten. A hard freeze of 28°F follows 15 days later, around November 26; in spring the one-in-ten date for 28°F is March 30, 8 days before the 32°F one. The freeze-free season lasts 232 days in a typical year, longer than at 84% of the 173 North Carolina stations; it reaches 258 days one year in ten and falls short of 209 one year in ten. On average 45 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 5, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 57%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 23 | Mar 27 | Mar 31 | Apr 2 | Apr 5 | Apr 7 | Apr 10 | Apr 14 | Apr 18 |
| 32°F | Mar 9 | Mar 15 | Mar 19 | Mar 22 | Mar 25 | Mar 28 | Mar 31 | Apr 3 | Apr 7 |
| 28°F | Feb 21 | Feb 28 | Mar 5 | Mar 9 | Mar 13 | Mar 16 | Mar 19 | Mar 24 | Mar 30 |
| 24°F99% of yrs | Jan 27 | Feb 5 | Feb 14 | Feb 22 | Feb 27 | Mar 2 | Mar 6 | Mar 11 | Mar 17 |
| 20°F88% of yrs | Jan 4 | Jan 15 | Jan 23 | Jan 30 | Feb 3 | Feb 10 | Feb 19 | Feb 27 | Mar 4 |
| 16°F57% of yrs | Dec 29 | Jan 5 | Jan 12 | Jan 17 | Jan 22 | Jan 28 | Jan 31 | Feb 6 | Feb 20 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 20 | Oct 23 | Oct 27 | Oct 30 | Nov 1 | Nov 3 | Nov 6 | Nov 9 | Nov 14 |
| 32°F | Oct 29 | Nov 1 | Nov 4 | Nov 8 | Nov 11 | Nov 14 | Nov 18 | Nov 24 | Dec 2 |
| 28°F | Nov 6 | Nov 12 | Nov 17 | Nov 22 | Nov 26 | Dec 1 | Dec 5 | Dec 11 | Dec 22 |
| 24°F99% of yrs | Nov 18 | Nov 26 | Dec 2 | Dec 7 | Dec 13 | Dec 19 | Dec 28 | Jan 3 | Jan 14 |
| 20°F88% of yrs | Dec 3 | Dec 12 | Dec 22 | Dec 29 | Jan 2 | Jan 8 | Jan 13 | Jan 20 | Feb 1 |
| 16°F57% of yrs | Dec 18 | Dec 29 | Jan 3 | Jan 8 | Jan 12 | Jan 16 | Jan 21 | Jan 28 | Feb 4 |
Freeze probabilities 1991–2020 at Kinston Ag Rsch, NC, 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 28530 →Compare Grifton with another place →
Weather by month in Grifton
July is the warmest month at Kinston Ag Rsch, NC, averaging 91°F by day and 71°F at night; January is the coldest at 56°F and 35°F. A freezing night is all but certain in every month from December 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 29% of years.
Warmth for growing adds up to 5,585 growing degree days a year (base 50°F), more than at 95% of the 173 North Carolina stations. 40% of them (2,240) have built up by the end of June, and July adds the most, 961. Precipitation totals 52.8 inches a year, most in September (6.6") and least in February (3.2"); May to September bring 53% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 56 | 35 | 3.7 | 100% | 14 | 70 |
| Feb | 60 | 37 | 3.2 | 99% | 10 | 84 |
| Mar | 67 | 42 | 3.8 | 96% | 6 | 203 |
| Apr | 75 | 51 | 3.5 | 29% | 1 | 407 |
| May | 82 | 60 | 3.9 | 0% | 0 | 643 |
| Jun | 88 | 68 | 5.5 | 0% | 0 | 832 |
| Jul | 91 | 71 | 5.8 | 0% | 0 | 961 |
| Aug | 89 | 70 | 6.4 | 0% | 0 | 905 |
| Sep | 84 | 64 | 6.6 | 0% | 0 | 720 |
| Oct | 76 | 53 | 3.6 | 15% | <1 | 454 |
| Nov | 67 | 44 | 3.5 | 87% | 5 | 205 |
| Dec | 59 | 38 | 3.3 | 99% | 11 | 100 |
Monthly normals 1991–2020 at Kinston Ag Rsch, NC (60 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, Kinston 7 SE, NC, 14 miles southwest of Grifton, has a last frost 7 days later (April 1), a first frost 7 days earlier (November 4), a season 15 days shorter.
When it snows in Grifton, North Carolina
Measurable snow is rare here: only 3 of 23 winters from 1991 to 2020 recorded 0.1 inch or more at Kinston Ag Rsch, NC, 9.7 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 28530
| When | What to do |
|---|---|
| January 14 – January 28 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 28 – February 11 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 25 – March 11 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 25 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 19 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 28 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 11 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 28530 is 10 miles from Kinston Ag Rsch, NC, which stands at 60 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 28504 (Kinston). The 2023 USDA Plant Hardiness Zone Map lists ZIP 28530 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 North 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.