ZIP 23707 Zone 8b
Virginia · USDA zone 8b, average annual extreme minimum 15°F to 20°F.
Nearest qualified station: NORFOLK S, VA US (USC00446147), 6.5 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 7 | Earlier date. A last 32°F on or after this day is common. |
| 50% | March 23 | Median. |
| 10% | April 6 | 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% | November 4 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 16 | Median. |
| 90% | December 1 | 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% | 262 |
| 50% | 239 |
| 90% | 220 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 26 | March 10 | February 19 |
| First, on or before | November 14 | December 1 | December 25 |
| Season at least | 295 days | 269 days | 243 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 18 | April 5 | March 22 |
| First, on or before | October 27 | November 6 | November 19 |
| Season at least | 236 days | 217 days | 200 days |
Station NORFOLK S, VA US (USC00446147). 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 3 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.