ZIP 92571 Zone 9b
California · USDA zone 9b, average annual extreme minimum 25°F to 30°F.
Nearest qualified station: RIVERSIDE CITRUS EXP, CA US (USC00047473), 12.9 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% | December 20 | Earlier date. A last 32°F on or after this day is common. |
| 50% | January 10 | Median. |
| 10% | February 17 | 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% | December 11 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | January 2 | Median. |
| 90% | February 7 | 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% | 365 |
| 90% | 334 |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 12 | February 11 | January 1 |
| First, on or before | November 25 | December 13 | January 8 |
| Season at least | 350 days | 312 days | 269 days |
Station RIVERSIDE CITRUS EXP, CA US (USC00047473). 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 45.3%. Freeze dates are conditional on that threshold occurring. Elevation 300.5 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.