When to plant in Graham, WA
USDA Zone 8bEverything below — frost dates, hardiness zone, and what to plant when in Graham, Washington — is derived from the closest NOAA station with complete climate normals.
Zone 8b means many perennials and even some tender shrubs overwinter in Graham, while your frost dates still decide when annuals go out.
Frost probability
MCMILLIN RSVR · 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 Graham’s own odds, recorded at MCMILLIN RSVR.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | May 1 | Apr 17 | Sep 30 | Oct 12 | Oct 31 |
| 32°F | Apr 29 | Apr 11 | Mar 23 | Oct 13 | Oct 30 | Nov 17 |
| 28°F | Apr 8 | Mar 16 | Feb 19 | Oct 28 | Nov 14 | Dec 8 |
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 Graham, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 26 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.
Graham planting FAQ
When is the last spring frost in Graham, WA?
Plan for the last spring frost in Graham around April 11 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Graham, WA?
The first fall frost in Graham typically arrives around October 30 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Graham in?
Graham is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Graham?
There are roughly 202 frost-free days in Graham (a moderate growing season), running from the average last frost around April 11 to the first fall frost near October 30.
When should I plant tomatoes in Graham?
In Graham, start tomato seeds indoors around February 14–February 28, then transplant seedlings outdoors around April 18 once the danger of frost has passed.
Never miss a window in Graham
An email when it’s time to start seeds, transplant, and sow — timed to Graham’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Elk Plain · 7 km
- Frederickson · 9 km
- South Hill · 10 km
- Spanaway · 13 km
- Prairie Ridge · 16 km
- Puyallup · 16 km
- Parkland · 17 km
- Bonney Lake · 20 km
Frost dates recorded at MCMILLIN RSVR, 11 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 Graham, WA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00455224. Retrieved from https://blissgarden.com/washington/graham.