ZIP 91010 Zone 10a
California · USDA zone 10a, average annual extreme minimum 30°F to 35°F.
Nearest qualified station: MT WILSON CBS, CA US (USC00046006), 8.9 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% | March 31 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 28 | Median. |
| 10% | May 27 | 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 18 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 15 | Median. |
| 90% | December 9 | 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% | 238 |
| 50% | 199 |
| 90% | 164 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 10 | April 8 | February 28 |
| First, on or before | November 5 | December 4 | December 29 |
| Season at least | 287 days | 240 days | 196 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | June 4 | May 15 | April 21 |
| First, on or before | October 3 | October 30 | November 19 |
| Season at least | 200 days | 167 days | 134 days |
Station MT WILSON CBS, CA US (USC00046006). Completeness flag R, 23 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 1740.4 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.