ZIP 97124 Zone 8b
Oregon · USDA zone 8b, average annual extreme minimum 15°F to 20°F.
Nearest qualified station: PORTLAND-HILLSBORO AP, OR US (USW00094261), 2 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 25 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 16 | Median. |
| 10% | May 3 | 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 3 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | October 23 | Median. |
| 90% | November 18 | 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% | 223 |
| 50% | 191 |
| 90% | 161 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 9 | March 13 | February 15 |
| First, on or before | October 20 | November 12 | December 10 |
| Season at least | 286 days | 243 days | 208 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 27 | May 5 | April 21 |
| First, on or before | September 20 | October 6 | October 31 |
| Season at least | 181 days | 153 days | 127 days |
Station PORTLAND-HILLSBORO AP, OR US (USW00094261). Completeness flag R, 20 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 62.2 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.