ZIP 36606 Zone 9a
Alabama · USDA zone 9a, average annual extreme minimum 20°F to 25°F.
Nearest qualified station: MOBILE DWTN AP, AL US (USW00013838), 3.7 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% | January 25 | Earlier date. A last 32°F on or after this day is common. |
| 50% | February 21 | Median. |
| 10% | March 15 | 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 15 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | December 6 | Median. |
| 90% | January 5 | 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% | 326 |
| 50% | 292 |
| 90% | 257 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 6 | February 2 | January 2 |
| First, on or before | November 30 | December 30 | January 30 |
| Season at least | 361 days | 326 days | 288 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 25 | March 6 | February 12 |
| First, on or before | November 5 | November 22 | December 13 |
| Season at least | 294 days | 264 days | 236 days |
Station MOBILE DWTN AP, AL US (USW00013838). Completeness flag S, 24 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 99.7%. Freeze dates are conditional on that threshold occurring. Elevation 7.9 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.