ZIP 27701 Zone 8a
North Carolina · USDA zone 8a, average annual extreme minimum 10°F to 15°F.
Nearest qualified station: DURHAM, NC US (USC00312515), 4.7 miles from the Census ZCTA internal point for this ZIP.
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
Last 32°F in spring
NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.
| Probability | Date | How to read it |
|---|---|---|
| 90% | March 15 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 2 | Median. |
| 10% | April 18 | Later date. A last 32°F on or after this day is uncommon. |
First 32°F in fall
NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.
| Probability | Date | How to read it |
|---|---|---|
| 10% | October 24 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 4 | Median. |
| 90% | November 19 | Later date. A first 32°F on or before this day is common. |
32°F growing-season length
Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.
| Probability the season is at least this long | Days |
|---|---|
| 10% | 239 |
| 50% | 217 |
| 90% | 197 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 6 | March 19 | February 28 |
| First, on or before | November 2 | November 16 | December 7 |
| Season at least | 269 days | 242 days | 219 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 1 | April 14 | March 30 |
| First, on or before | October 13 | October 27 | November 6 |
| Season at least | 214 days | 194 days | 172 days |
Station DURHAM, NC US (USC00312515). Completeness flag R, 16 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 121.9 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.