Burlington, WA frost dates
Last spring frostMar 24median date
First fall frostNov 3median date
Growing season224 daysfrost-free
Hardiness zone8bZone 8b
How Burlington compares
- In 8 years out of 10, the last spring frost in Burlington falls between March 3 and April 14, a 42-day window. The first fall frost falls between October 12 and November 25.
- The median last frost is 28 days earlier than the Washington median of Apr 21.
- Its 224-day growing season is longer than 78% of the 491 Washington places with a regular frost season (state median 182 days).
- The last frost is 8 days later than the zone 8b median of Mar 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8b chart.
- The weather station records an average of 46 nights a year at or below 32°F.
- Compared with Bellingham, WA, 32 km away, the last frost here is 8 days earlier than there and the growing season is 9 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 3 |
| 50% (median) | March 24 |
| 10% (safe for tender plants) | April 14 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 12 |
| 50% (median) | November 3 |
| 90% (late) | November 25 |
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 Burlington, WA
Burlington, WA frost dates — last frost Mar 24, first frost Nov 3, zone 8b. whenisthelastfrost.com
Crop
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Start indoors: Dec 30 to Jan 13Start indoors: Dec 30 to Jan 13Transplant outside: Feb 24 to Mar 10
Start indoors: Jan 13 to Jan 27Transplant outside: Apr 7 to Apr 21
Start indoors: Jan 13 to Jan 27Transplant outside: Apr 7 to Apr 21
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 31 to Apr 14
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 3 to Mar 17Sow outdoors: Feb 24 to Mar 31Plant for fall: Sep 8 to Oct 6
Start indoors: Jan 27 to Feb 10Transplant outside: Feb 24 to Mar 10Sow outdoors: Feb 24 to Mar 10Plant for fall: Aug 25 to Sep 15
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 10 to Mar 24Plant for fall: Jul 28 to Aug 18
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 3 to Mar 17Plant for fall: Jul 28 to Aug 18
Start indoors: Jan 27 to Feb 10Transplant outside: Mar 10 to Mar 24Plant for fall: Jul 28 to Aug 18
Start indoors: Feb 10 to Feb 24Transplant outside: Apr 14 to Apr 28Sow outdoors: Apr 14 to Apr 28
Start indoors: Feb 10 to Feb 24Transplant outside: Mar 31 to Apr 14
Sow outdoors: Feb 10 to Mar 3Plant for fall: Aug 11 to Sep 1
Sow outdoors: Feb 10 to Mar 3Plant for fall: Sep 8 to Sep 29
Sow outdoors: Feb 17 to Mar 31Plant for fall: Sep 22 to Oct 13
Start indoors: Feb 24 to Mar 3Transplant outside: Apr 7 to Apr 14Sow outdoors: Mar 31 to Apr 14Plant for fall: Aug 18 to Sep 1
Start indoors: Feb 24 to Mar 3Sow outdoors: Mar 31 to Apr 14Plant for fall: Aug 25 to Sep 8
Start indoors: Feb 24 to Mar 3Sow outdoors: Mar 31 to Apr 14
Start indoors: Feb 24 to Mar 3Transplant outside: Apr 7 to Apr 21
Sow outdoors: Mar 3 to Mar 31Plant for fall: Aug 11 to Aug 25
Sow outdoors: Mar 3 to Mar 31Plant for fall: Aug 25 to Sep 8
Sow outdoors: Mar 3 to Mar 24
Sow outdoors: Mar 10 to Apr 7Plant for fall: Aug 25 to Sep 8
Sow outdoors: Mar 10 to Mar 31Plant for fall: Sep 8 to Sep 29
Sow outdoors: Mar 31 to Apr 21Plant for fall: Aug 18 to Sep 1
Sow outdoors: Mar 31 to Apr 14
Transplant outside: Apr 7 to Apr 28
Plant for fall: Oct 20 to Nov 24
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Burlington, WA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 30 – Jan 13 | Feb 24 – Mar 10 | — | — |
| Peppers | Jan 13 – Jan 27 | Apr 7 – Apr 21 | — | — |
| Eggplant | Jan 13 – Jan 27 | Apr 7 – Apr 21 | — | — |
| Tomatoes | Jan 27 – Feb 10 | Mar 31 – Apr 14 | — | — |
| Lettuce | Jan 27 – Feb 10 | Mar 3 – Mar 17 | Feb 24 – Mar 31 | Sep 8 – Oct 6 |
| Kale | Jan 27 – Feb 10 | Feb 24 – Mar 10 | Feb 24 – Mar 10 | Aug 25 – Sep 15 |
| Broccoli | Jan 27 – Feb 10 | Mar 10 – Mar 24 | — | Jul 28 – Aug 18 |
| Cabbage | Jan 27 – Feb 10 | Mar 3 – Mar 17 | — | Jul 28 – Aug 18 |
| Cauliflower | Jan 27 – Feb 10 | Mar 10 – Mar 24 | — | Jul 28 – Aug 18 |
| Okra | Feb 10 – Feb 24 | Apr 14 – Apr 28 | Apr 14 – Apr 28 | — |
| Basil | Feb 10 – Feb 24 | Mar 31 – Apr 14 | — | — |
| Peas | — | — | Feb 10 – Mar 3 | Aug 11 – Sep 1 |
| Spinach | — | — | Feb 10 – Mar 3 | Sep 8 – Sep 29 |
| Radishes | — | — | Feb 17 – Mar 31 | Sep 22 – Oct 13 |
| Cucumbers | Feb 24 – Mar 3 | Apr 7 – Apr 14 | Mar 31 – Apr 14 | Aug 18 – Sep 1 |
| Zucchini & Summer Squash | Feb 24 – Mar 3 | — | Mar 31 – Apr 14 | Aug 25 – Sep 8 |
| Winter Squash & Pumpkins | Feb 24 – Mar 3 | — | Mar 31 – Apr 14 | — |
| Melons & Watermelon | Feb 24 – Mar 3 | Apr 7 – Apr 21 | — | — |
| Carrots | — | — | Mar 3 – Mar 31 | Aug 11 – Aug 25 |
| Beets | — | — | Mar 3 – Mar 31 | Aug 25 – Sep 8 |
| Potatoes | — | — | Mar 3 – Mar 24 | — |
| Swiss Chard | — | — | Mar 10 – Apr 7 | Aug 25 – Sep 8 |
| Cilantro | — | — | Mar 10 – Mar 31 | Sep 8 – Sep 29 |
| Green Beans | — | — | Mar 31 – Apr 21 | Aug 18 – Sep 1 |
| Sweet Corn | — | — | Mar 31 – Apr 14 | — |
| Sweet Potatoes | — | Apr 7 – Apr 28 | — | — |
| Garlic | — | — | — | Oct 20 – Nov 24 |
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 Mt Vernon 3 Wnw, WA weather station, 6 km away (elevation 13 ft (4 m)).
Frost dates near Burlington
- Clearlake Mar 27 · Nov 6
- Sedro Woolley Mar 27 · Nov 6
- Bow Mar 24 · Nov 3
- Mount Vernon Mar 27 · Nov 6
- Conway Mar 24 · Nov 3
- La Conner Mar 24 · Nov 3
- Lyman Mar 27 · Nov 6
- Anacortes Mar 8 · Nov 20
- Acme Mar 27 · Nov 6
- Hamilton Mar 28 · Nov 14
Frequently asked questions
When is the last frost in Burlington, WA?
The median last spring frost in Burlington, WA is March 24. There is still about a 10% chance of frost after April 14, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Burlington, WA?
The median first fall frost is November 3, with about a 10% chance of frost before October 12.
How long is the growing season in Burlington, WA?
About 224 days between the median last spring frost and first fall frost.
What planting zone is Burlington, WA?
Burlington, WA is in USDA hardiness zone 8b.