ZIP 97223 Zone 9a
Oregon · USDA zone 9a, average annual extreme minimum 20°F to 25°F.
Nearest qualified station: BEAVERTON 2 SSW, OR US (USC00350595), 2.3 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 5 | Earlier date. A last 32°F on or after this day is common. |
| 50% | April 1 | Median. |
| 10% | April 26 | 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 19 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 6 | Median. |
| 90% | December 1 | 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% | 254 |
| 50% | 222 |
| 90% | 186 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 26 | February 26 | January 23 |
| First, on or before | November 6 | November 30 | December 27 |
| Season at least | 317 days | 275 days | 239 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 16 | April 28 | April 11 |
| First, on or before | October 4 | October 21 | November 7 |
| Season at least | 198 days | 174 days | 150 days |
Station BEAVERTON 2 SSW, OR US (USC00350595). Completeness flag R, 15 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 82.3 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.