Kingston, WA frost dates
Last spring frostMar 9median date
First fall frostNov 17median date
Growing season253 daysfrost-free
Hardiness zone9aZone 9a
How Kingston compares
- In 8 years out of 10, the last spring frost in Kingston falls between February 15 and March 29, a 42-day window. The first fall frost falls between October 31 and December 7.
- The median last frost is 43 days earlier than the Washington median of Apr 21.
- Its 253-day growing season is longer than 91% of the 491 Washington places with a regular frost season (state median 182 days).
- The last frost is 6 days later than the zone 9a median of Mar 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 9a chart.
- The weather station records an average of 29 nights a year at or below 32°F.
- Kingston shares its weather station with Everett, WA, 26 km away, so the two have the same frost dates.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 15 |
| 50% (median) | March 9 |
| 10% (safe for tender plants) | March 29 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 31 |
| 50% (median) | November 17 |
| 90% (late) | December 7 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Kingston, WA
Kingston, WA frost dates — last frost Mar 9, first frost Nov 17, zone 9a. whenisthelastfrost.com
Crop
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Start indoors: Dec 15 to Dec 29Transplant outside: Feb 9 to Feb 23
Start indoors: Dec 29 to Jan 12Start indoors: Dec 29 to Jan 12Transplant outside: Mar 23 to Apr 6
Start indoors: Dec 29 to Jan 12Start indoors: Dec 29 to Jan 12Transplant outside: Mar 23 to Apr 6
Start indoors: Jan 12 to Jan 26Transplant outside: Mar 16 to Mar 30
Start indoors: Jan 12 to Jan 26Transplant outside: Feb 16 to Mar 2Sow outdoors: Feb 9 to Mar 16Plant for fall: Sep 22 to Oct 20
Start indoors: Jan 12 to Jan 26Transplant outside: Feb 9 to Feb 23Sow outdoors: Feb 9 to Feb 23Plant for fall: Sep 8 to Sep 29
Start indoors: Jan 12 to Jan 26Transplant outside: Feb 23 to Mar 9Plant for fall: Aug 11 to Sep 1
Start indoors: Jan 12 to Jan 26Transplant outside: Feb 16 to Mar 2Plant for fall: Aug 11 to Sep 1
Start indoors: Jan 12 to Jan 26Transplant outside: Feb 23 to Mar 9Plant for fall: Aug 11 to Sep 1
Start indoors: Jan 26 to Feb 9Transplant outside: Mar 30 to Apr 13Sow outdoors: Mar 30 to Apr 13
Start indoors: Jan 26 to Feb 9Transplant outside: Mar 16 to Mar 30
Sow outdoors: Jan 26 to Feb 16Plant for fall: Aug 25 to Sep 15
Sow outdoors: Jan 26 to Feb 16Plant for fall: Sep 22 to Oct 13
Sow outdoors: Feb 2 to Mar 16Plant for fall: Oct 6 to Oct 27
Start indoors: Feb 9 to Feb 16Transplant outside: Mar 23 to Mar 30Sow outdoors: Mar 16 to Mar 30Plant for fall: Sep 1 to Sep 15
Start indoors: Feb 9 to Feb 16Sow outdoors: Mar 16 to Mar 30Plant for fall: Sep 8 to Sep 22
Start indoors: Feb 9 to Feb 16Sow outdoors: Mar 16 to Mar 30
Start indoors: Feb 9 to Feb 16Transplant outside: Mar 23 to Apr 6
Sow outdoors: Feb 16 to Mar 16Plant for fall: Aug 25 to Sep 8
Sow outdoors: Feb 16 to Mar 16Plant for fall: Sep 8 to Sep 22
Sow outdoors: Feb 16 to Mar 9
Sow outdoors: Feb 23 to Mar 23Plant for fall: Sep 8 to Sep 22
Sow outdoors: Feb 23 to Mar 16Plant for fall: Sep 22 to Oct 13
Sow outdoors: Mar 16 to Apr 6Plant for fall: Sep 1 to Sep 15
Sow outdoors: Mar 16 to Mar 30
Transplant outside: Mar 23 to Apr 13
Plant for fall: Nov 3 to Dec 8
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Kingston, WA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 15 – Dec 29 | Feb 9 – Feb 23 | — | — |
| Peppers | Dec 29 – Jan 12 | Mar 23 – Apr 6 | — | — |
| Eggplant | Dec 29 – Jan 12 | Mar 23 – Apr 6 | — | — |
| Tomatoes | Jan 12 – Jan 26 | Mar 16 – Mar 30 | — | — |
| Lettuce | Jan 12 – Jan 26 | Feb 16 – Mar 2 | Feb 9 – Mar 16 | Sep 22 – Oct 20 |
| Kale | Jan 12 – Jan 26 | Feb 9 – Feb 23 | Feb 9 – Feb 23 | Sep 8 – Sep 29 |
| Broccoli | Jan 12 – Jan 26 | Feb 23 – Mar 9 | — | Aug 11 – Sep 1 |
| Cabbage | Jan 12 – Jan 26 | Feb 16 – Mar 2 | — | Aug 11 – Sep 1 |
| Cauliflower | Jan 12 – Jan 26 | Feb 23 – Mar 9 | — | Aug 11 – Sep 1 |
| Okra | Jan 26 – Feb 9 | Mar 30 – Apr 13 | Mar 30 – Apr 13 | — |
| Basil | Jan 26 – Feb 9 | Mar 16 – Mar 30 | — | — |
| Peas | — | — | Jan 26 – Feb 16 | Aug 25 – Sep 15 |
| Spinach | — | — | Jan 26 – Feb 16 | Sep 22 – Oct 13 |
| Radishes | — | — | Feb 2 – Mar 16 | Oct 6 – Oct 27 |
| Cucumbers | Feb 9 – Feb 16 | Mar 23 – Mar 30 | Mar 16 – Mar 30 | Sep 1 – Sep 15 |
| Zucchini & Summer Squash | Feb 9 – Feb 16 | — | Mar 16 – Mar 30 | Sep 8 – Sep 22 |
| Winter Squash & Pumpkins | Feb 9 – Feb 16 | — | Mar 16 – Mar 30 | — |
| Melons & Watermelon | Feb 9 – Feb 16 | Mar 23 – Apr 6 | — | — |
| Carrots | — | — | Feb 16 – Mar 16 | Aug 25 – Sep 8 |
| Beets | — | — | Feb 16 – Mar 16 | Sep 8 – Sep 22 |
| Potatoes | — | — | Feb 16 – Mar 9 | — |
| Swiss Chard | — | — | Feb 23 – Mar 23 | Sep 8 – Sep 22 |
| Cilantro | — | — | Feb 23 – Mar 16 | Sep 22 – Oct 13 |
| Green Beans | — | — | Mar 16 – Apr 6 | Sep 1 – Sep 15 |
| Sweet Corn | — | — | Mar 16 – Mar 30 | — |
| Sweet Potatoes | — | Mar 23 – Apr 13 | — | — |
| Garlic | — | — | — | Nov 3 – Dec 8 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Everett Snohomish Ap, WA weather station, 21 km away (elevation 607 ft (185 m)).
Frost dates near Kingston
- Port Gamble Mar 9 · Nov 17
- Indianola Mar 8 · Nov 23
- Suquamish Mar 29 · Nov 14
- Poulsbo Mar 29 · Nov 14
- Hansville Mar 9 · Nov 17
- Edmonds Mar 9 · Nov 17
- Keyport Mar 29 · Nov 14
- Rollingbay Mar 29 · Nov 14
- Mountlake Terrace Mar 8 · Nov 23
- Port Ludlow Apr 11 · Oct 28
Frequently asked questions
When is the last frost in Kingston, WA?
The median last spring frost in Kingston, WA is March 9. There is still about a 10% chance of frost after March 29, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Kingston, WA?
The median first fall frost is November 17, with about a 10% chance of frost before October 31.
How long is the growing season in Kingston, WA?
About 253 days between the median last spring frost and first fall frost.
What planting zone is Kingston, WA?
Kingston, WA is in USDA hardiness zone 9a.