ZIP 73505 Zone 7b
Oklahoma · USDA zone 7b, average annual extreme minimum 5°F to 10°F.
Nearest qualified station: LAWTON, OK US (USC00345063), 3.1 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 4 | Earlier date. A last 32°F on or after this day is common. |
| 50% | March 26 | Median. |
| 10% | April 14 | 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 21 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 7 | Median. |
| 90% | November 22 | 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% | 253 |
| 50% | 225 |
| 90% | 200 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 3 | March 11 | February 22 |
| First, on or before | October 30 | November 16 | December 5 |
| Season at least | 277 days | 252 days | 221 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 24 | April 7 | March 20 |
| First, on or before | October 16 | October 29 | November 13 |
| Season at least | 228 days | 204 days | 182 days |
Station LAWTON, OK US (USC00345063). Completeness flag R, 14 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 350.5 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.