When to plant in Airway Heights, WA
USDA Zone 6bAirway Heights, Washington frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6b, Airway Heights gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average first fall frost in Airway Heights is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
SPOKANE INTL AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Airway Heights’s own odds, recorded at SPOKANE INTL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 26 | May 8 | Apr 26 | Sep 17 | Oct 1 | Oct 14 |
| 32°F | May 10 | Apr 26 | Apr 9 | Sep 29 | Oct 12 | Oct 28 |
| 28°F | Apr 28 | Apr 6 | Mar 15 | Oct 7 | Oct 23 | Nov 10 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Airway Heights, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Airway Heights planting FAQ
When is the last spring frost in Airway Heights, WA?
Airway Heights's average last spring frost falls near April 26 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Airway Heights, WA?
The first fall frost in Airway Heights typically arrives around October 12 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Airway Heights in?
Airway Heights is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Airway Heights?
Airway Heights has about 169 frost-free days — a moderate growing season — between the average last spring frost (April 26) and first fall frost (October 12).
When should I plant tomatoes in Airway Heights?
For Airway Heights, sow tomatoes indoors about March 1–March 15 and move the seedlings out around May 3, after the last spring frost.
Never miss a window in Airway Heights
An email when it’s time to start seeds, transplant, and sow — timed to Airway Heights’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Spokane · 11 km
- Cheney · 17 km
- Spokane Valley · 26 km
- Liberty Lake · 36 km
- Post Falls · 48 km
- Rathdrum · 54 km
- Coeur d'Alene · 59 km
- Hayden · 60 km
Frost dates recorded at SPOKANE INTL AP, 5 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Airway Heights, WA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00024157. Retrieved from https://blissgarden.com/washington/airway-heights.