When to plant in Mount Vista, WA
USDA Zone 8bEverything below — frost dates, hardiness zone, and what to plant when in Mount Vista, Washington — is derived from the closest NOAA station with complete climate normals.
In zone 8b, Mount Vista supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
The average last spring frost in Mount Vista is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
VANCOUVER 4 NNE · 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 Mount Vista’s own odds, recorded at VANCOUVER 4 NNE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 30 | May 10 | Apr 28 | Sep 14 | Oct 1 | Oct 22 |
| 32°F | May 10 | Apr 26 | Apr 7 | Oct 1 | Oct 18 | Nov 8 |
| 28°F | Apr 20 | Mar 30 | Mar 8 | Oct 16 | Nov 4 | Nov 28 |
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 Mount Vista, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
Mount Vista planting FAQ
When is the last spring frost in Mount Vista, WA?
Mount Vista'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 Mount Vista, WA?
The first fall frost in Mount Vista typically arrives around October 18 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Mount Vista in?
Mount Vista is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Mount Vista?
Mount Vista has about 175 frost-free days — a moderate growing season — between the average last spring frost (April 26) and first fall frost (October 18).
When should I plant tomatoes in Mount Vista?
For Mount Vista, 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 Mount Vista
An email when it’s time to start seeds, transplant, and sow — timed to Mount Vista’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Salmon Creek · 4 km
- Hazel Dell · 6 km
- Felida · 7 km
- Five Corners · 7 km
- Battle Ground · 8 km
- Minnehaha · 9 km
- Ridgefield · 9 km
- Orchards · 10 km
Frost dates recorded at VANCOUVER 4 NNE, 7 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 Mount Vista, WA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00458773. Retrieved from https://blissgarden.com/washington/mount-vista.