Hoquiam Bowerman Airport, WA Frost Dates & Growing Season

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

Last spring frost
Mar 30
~50% chance of frost after
First fall frost
Nov 14
~50% chance of frost before
Growing season
229 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 28 Mar 30 Apr 25
First fall frost Dec 9 Nov 14 Oct 22
Hard freeze (28°F), median last Feb 21 · first Dec 8

Computed from NOAA 1991–2020 climate normals at the HOQUIAM BOWERMAN 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 Hoquiam Bowerman Airport

Computed from Hoquiam Bowerman 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 Feb 2 – Feb 16 Apr 6 – Apr 13
🫑 Peppers Jan 19 – Feb 2 Apr 13 – Apr 20
🥬 Lettuce Feb 16 – Mar 2 Mar 2 – Mar 16 Mar 2 – Mar 30
🫛 Peas Feb 16 – Mar 2
🥕 Carrots Mar 9 – Mar 30
🥦 Broccoli Feb 9 – Feb 23 Mar 9 – Mar 23
🥬 Kale Feb 16 – Mar 2 Mar 2 – Mar 16 Mar 2 – Mar 16
🥒 Cucumbers Mar 2 – Mar 9 Apr 6 – Apr 13 Apr 6 – Apr 13
🥒 Zucchini Mar 2 – Mar 9 Apr 6 – Apr 13 Apr 6 – Apr 13
🫘 Green Beans (Bush) Apr 6 – Apr 13
🌽 Sweet Corn Apr 6 – Apr 13
🌿 Basil Feb 16 – Mar 2 Apr 6 – Apr 13 Apr 13 – Apr 20
🧄 Garlic Fall: Oct 3 – Oct 31

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 Hoquiam Bowerman Airport's dates automatically after a lookup.

Reading the season in Hoquiam Bowerman Airport

With roughly 229 frost-free days, Hoquiam Bowerman 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 14 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Hoquiam Bowerman Airport, WA?

The average last spring frost in Hoquiam Bowerman Airport is around Mar 30, 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 Hoquiam Bowerman Airport, WA?

The average first fall frost in Hoquiam Bowerman Airport arrives around Nov 14. 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 Hoquiam Bowerman Airport?

About 229 frost-free days on average, from Mar 30 to Nov 14. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Hoquiam Bowerman 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.