ZIP 28115 Zone 8a
North Carolina · USDA zone 8a, average annual extreme minimum 10°F to 15°F.
Nearest qualified station: SALISBURY 9 WNW, NC US (USC00317618), 12 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 24 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 9 | Median. |
| 10% | April 24 | 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 15 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | October 28 | Median. |
| 90% | November 8 | 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% | 221 |
| 50% | 203 |
| 90% | 183 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 10 | March 28 | March 10 |
| First, on or before | October 26 | November 6 | November 22 |
| Season at least | 248 days | 223 days | 205 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 10 | April 21 | April 7 |
| First, on or before | October 10 | October 21 | October 31 |
| Season at least | 201 days | 181 days | 161 days |
Station SALISBURY 9 WNW, NC US (USC00317618). Completeness flag S, 26 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 221 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.