ZIP 85658 Zone 9b
Arizona · USDA zone 9b, average annual extreme minimum 25°F to 30°F.
Nearest qualified station: CATALINA SP, AZ US (USC00021357), 14.6 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 16 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 2 | 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 26 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 11 | Median. |
| 90% | November 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% | 245 |
| 50% | 222 |
| 90% | 196 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 1 | March 12 | February 22 |
| First, on or before | November 3 | November 21 | December 10 |
| Season at least | 278 days | 252 days | 226 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 5 | April 18 | April 4 |
| First, on or before | October 18 | November 1 | November 17 |
| Season at least | 218 days | 195 days | 173 days |
Station CATALINA SP, AZ US (USC00021357). Completeness flag R, 13 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 825.1 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.