Everett Snohomish Airport, WA Frost Dates & Growing Season

The two dates every Everett Snohomish Airport garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Mar 9
~50% chance of frost after
First fall frost
Nov 17
~50% chance of frost before
Growing season
253 days
frost-free stretch
USDA zone
≈ 9a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Feb 15 Mar 9 Mar 29
First fall frost Dec 7 Nov 17 Oct 31
Hard freeze (28°F), median last Feb 13 · first Dec 6

Computed from NOAA 1991–2020 climate normals at the EVERETT SNOHOMISH AP station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Everett Snohomish Airport

Computed from Everett Snohomish Airport's own frost dates. Click any crop for the full zone-9 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Jan 12 – Jan 26 Mar 16 – Mar 23
🫑 Peppers Dec 29 – Jan 12 Mar 23 – Mar 30
🥬 Lettuce Jan 26 – Feb 9 Feb 9 – Feb 23 Feb 9 – Mar 9
🫛 Peas Jan 26 – Feb 9
🥕 Carrots Feb 16 – Mar 9
🥦 Broccoli Jan 19 – Feb 2 Feb 16 – Mar 2
🥬 Kale Jan 26 – Feb 9 Feb 9 – Feb 23 Feb 9 – Feb 23
🥒 Cucumbers Feb 9 – Feb 16 Mar 16 – Mar 23 Mar 16 – Mar 23
🥒 Zucchini Feb 9 – Feb 16 Mar 16 – Mar 23 Mar 16 – Mar 23
🫘 Green Beans (Bush) Mar 16 – Mar 23
🌽 Sweet Corn Mar 16 – Mar 23
🌿 Basil Jan 26 – Feb 9 Mar 16 – Mar 23 Mar 23 – Mar 30
🧄 Garlic Fall: Oct 6 – Nov 3

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Everett Snohomish Airport's dates automatically after a lookup.

Reading the season in Everett Snohomish Airport

With roughly 253 frost-free days, Everett Snohomish Airport gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Nov 17 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Everett Snohomish Airport, WA?

The average last spring frost in Everett Snohomish Airport is around Mar 9, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Everett Snohomish Airport, WA?

The average first fall frost in Everett Snohomish Airport arrives around Nov 17. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Everett Snohomish Airport?

About 253 frost-free days on average, from Mar 9 to Nov 17. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Everett Snohomish Airport in?

USDA zone 9a on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.