USDA Hardiness Zone 8a
Frost Dates for 27371 — Troy, North Carolina
NOAA 1991–2020 normals from Albemarle, NC (610 ft), 16 miles west.
Updated
In Troy, the last spring frost (32°F) is around March 29 in half of years and has passed by April 14 in nine years out of ten. The first fall frost comes around November 4, as early as October 24 one year in ten, leaving a typical freeze-free season of 220 days (NOAA, Albemarle, NC).
- Last spring frost
- March 29
- First fall frost
- November 4
- Growing season
- 220 days
- Hardiness zone
- 8a
50% probability
50% probability
freeze-free, 50%
10 to 15°F (-12.2 to -9.4°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 33%
- Snow per year
- 0.8"
median, 1991–2020
median, 1991–2020
6 of 18 observed
NOAA normal
Frost risk by date in Troy
Half of springs at Albemarle, NC see their last 32°F night by March 29; only one in ten is past it by March 11, and one in ten still has one after April 14. Planting tender crops after April 4 leaves a 30% risk of a frost on them, after April 8 20%, and after April 14 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 35% of the 173 North Carolina stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 4 in half of years, as early as October 24 one year in ten, and holds off past November 20 one year in ten. A hard freeze of 28°F follows 12 days later, around November 16; in spring the one-in-ten date for 28°F is April 2, 12 days before the 32°F one. The freeze-free season lasts 220 days in a typical year, longer than at 55% of the 173 North Carolina stations; it reaches 244 days one year in ten and falls short of 198 one year in ten. On average 66 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 13 days longer, to about April 11, and return around October 27. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 82%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 27 | Mar 31 | Apr 3 | Apr 7 | Apr 11 | Apr 14 | Apr 17 | Apr 21 | Apr 27 |
| 32°F | Mar 11 | Mar 18 | Mar 22 | Mar 26 | Mar 29 | Apr 1 | Apr 4 | Apr 8 | Apr 14 |
| 28°F | Feb 24 | Mar 2 | Mar 7 | Mar 12 | Mar 16 | Mar 20 | Mar 24 | Mar 28 | Apr 2 |
| 24°F | Feb 6 | Feb 14 | Feb 22 | Feb 26 | Mar 1 | Mar 6 | Mar 10 | Mar 16 | Mar 23 |
| 20°F97% of yrs | Jan 16 | Jan 27 | Jan 31 | Feb 6 | Feb 12 | Feb 18 | Feb 25 | Mar 1 | Mar 9 |
| 16°F82% of yrs | Jan 1 | Jan 13 | Jan 21 | Jan 27 | Jan 30 | Feb 2 | Feb 7 | Feb 14 | Feb 24 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 14 | Oct 18 | Oct 22 | Oct 24 | Oct 27 | Oct 29 | Nov 1 | Nov 3 | Nov 7 |
| 32°F | Oct 24 | Oct 28 | Oct 31 | Nov 1 | Nov 4 | Nov 6 | Nov 9 | Nov 14 | Nov 20 |
| 28°F | Nov 1 | Nov 5 | Nov 8 | Nov 12 | Nov 16 | Nov 20 | Nov 25 | Dec 1 | Dec 7 |
| 24°F | Nov 11 | Nov 16 | Nov 21 | Nov 27 | Dec 1 | Dec 5 | Dec 11 | Dec 21 | Jan 1 |
| 20°F97% of yrs | Nov 25 | Dec 2 | Dec 7 | Dec 15 | Dec 23 | Dec 29 | Jan 3 | Jan 10 | Jan 19 |
| 16°F82% of yrs | Dec 9 | Dec 19 | Dec 27 | Jan 2 | Jan 7 | Jan 12 | Jan 18 | Jan 25 | Feb 2 |
Freeze probabilities 1991–2020 at Albemarle, 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 27371 →Compare Troy with another place →
Weather by month in Troy
July is the warmest month at Albemarle, NC, averaging 89°F by day and 69°F at night; January is the coldest at 51°F and 31°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 41% of years.
Warmth for growing adds up to 4,762 growing degree days a year (base 50°F), more than at 55% of the 173 North Carolina stations. 39% of them (1,849) have built up by the end of June, and July adds the most, 896. Precipitation totals 48.2 inches a year, most in July (5.2") and least in February (3.0"); May to September bring 48% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 51 | 31 | 3.8 | 100% | 19 | 28 |
| Feb | 55 | 33 | 3.0 | 99% | 15 | 41 |
| Mar | 63 | 40 | 4.0 | 95% | 8 | 141 |
| Apr | 72 | 48 | 3.7 | 41% | 1 | 313 |
| May | 79 | 57 | 3.5 | 0% | 0 | 558 |
| Jun | 86 | 66 | 4.7 | 0% | 0 | 768 |
| Jul | 89 | 69 | 5.2 | 0% | 0 | 896 |
| Aug | 87 | 68 | 4.9 | 0% | 0 | 857 |
| Sep | 81 | 62 | 4.6 | 0% | 0 | 642 |
| Oct | 73 | 50 | 3.6 | 33% | 1 | 353 |
| Nov | 62 | 40 | 3.3 | 95% | 8 | 120 |
| Dec | 54 | 34 | 3.9 | 98% | 16 | 46 |
Monthly normals 1991–2020 at Albemarle, NC (610 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, Jackson Springs 5 WNW, NC, 20 miles southeast of Troy, has a last frost 4 days earlier (March 25), a first frost 10 days later (November 14), a season 15 days longer.
When it snows in Troy, North Carolina
Measurable snow is rare here: only 6 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Albemarle, NC, 15.5 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 27371
| When | What to do |
|---|---|
| January 18 – February 1 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 1 – February 15 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 1 – March 15 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 29 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 12 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 21 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 4 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 27371 is 16 miles from Albemarle, NC, which stands at 610 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 8 other ZIP codes share the station; its figures are presented in full for 28001 (Albemarle). The 2023 USDA Plant Hardiness Zone Map lists ZIP 27371 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°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.