ZIP 85122 Zone 9a
Arizona · USDA zone 9a, average annual extreme minimum 20°F to 25°F.
Nearest qualified station: CASA GRANDE, AZ US (USC00021306), 2.8 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% | January 5 | Earlier date. A last 32°F on or after this day is common. |
| 50% | February 5 | Median. |
| 10% | February 28 | 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 18 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | December 6 | Median. |
| 90% | December 29 | 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% | 340 |
| 50% | 305 |
| 90% | 273 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | February 15 | January 14 | December 16 |
| First, on or before | November 29 | December 22 | January 24 |
| Season at least | 365 days | 340 days | 304 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 16 | February 26 | January 31 |
| First, on or before | November 7 | November 24 | December 11 |
| Season at least | 299 days | 271 days | 243 days |
Station CASA GRANDE, AZ US (USC00021306). Completeness flag R, 18 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 98.6%. Freeze dates are conditional on that threshold occurring. Elevation 426.7 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.