ZIP 98258 Zone 8b
Washington · USDA zone 8b, average annual extreme minimum 15°F to 20°F.
Nearest qualified station: EVERETT, WA US (USC00452675), 6.6 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 4 | Earlier date. A last 32°F on or after this day is common. |
| 50% | March 24 | Median. |
| 10% | April 11 | 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 16 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 2 | Median. |
| 90% | November 23 | 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% | 249 |
| 50% | 223 |
| 90% | 197 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 20 | March 1 | January 31 |
| First, on or before | October 29 | November 21 | December 14 |
| Season at least | 303 days | 265 days | 234 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | May 8 | April 20 | March 31 |
| First, on or before | October 1 | October 18 | November 4 |
| Season at least | 209 days | 183 days | 154 days |
Station EVERETT, WA US (USC00452675). Completeness flag S, 27 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 18.3 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.