ZIP 77546 Zone 9b
Texas · USDA zone 9b, average annual extreme minimum 25°F to 30°F.
Nearest qualified station: HOUSTON CLOVER FLD, TX US (USW00012975), 3 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 1 | Earlier date. A last 32°F on or after this day is common. |
| 50% | January 31 | Median. |
| 10% | March 5 | 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 28 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | December 27 | Median. |
| 90% | January 28 | 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% | 365 |
| 50% | 328 |
| 90% | 286 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | February 20 | January 18 | December 22 |
| First, on or before | December 14 | January 8 | February 4 |
| Season at least | 365 days | 365 days | 325 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 18 | February 21 | January 23 |
| First, on or before | November 13 | December 3 | January 2 |
| Season at least | 324 days | 287 days | 252 days |
Station HOUSTON CLOVER FLD, TX US (USW00012975). Completeness flag R, 17 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 88.7%. Freeze dates are conditional on that threshold occurring. Elevation 13.4 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.