ZIP 23606 Zone 8a
Virginia · USDA zone 8a, average annual extreme minimum 10°F to 15°F.
Nearest qualified station: NEWPORT NEWS INTL AP, VA US (USW00093741), 4.8 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 18 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 1 | 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 31 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 9 | Median. |
| 90% | November 25 | 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% | 241 |
| 50% | 221 |
| 90% | 203 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 4 | March 20 | March 2 |
| First, on or before | November 5 | November 20 | December 8 |
| Season at least | 270 days | 244 days | 222 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 3 | April 15 | March 31 |
| First, on or before | October 20 | October 31 | November 11 |
| Season at least | 217 days | 198 days | 178 days |
Station NEWPORT NEWS INTL AP, VA US (USW00093741). Completeness flag R, 12 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 12.8 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.