When to plant in The Dalles, OR
USDA Zone 8aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for The Dalles, Oregon — all computed from The Dalles's nearest NOAA weather station.
In zone 8a, The Dalles supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
THE DALLES MUNI 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 The Dalles’s own odds, recorded at THE DALLES MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 12 | Apr 28 | Apr 13 | Oct 1 | Oct 13 | Oct 28 |
| 32°F | Apr 28 | Apr 11 | Mar 24 | Oct 9 | Oct 26 | Nov 10 |
| 28°F | Apr 9 | Mar 16 | Feb 27 | Oct 22 | Nov 7 | 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 The Dalles, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
The Dalles planting FAQ
When is the last spring frost in The Dalles, OR?
The Dalles's average last spring frost falls near April 11 — 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 The Dalles, OR?
Expect The Dalles's first fall frost near October 26 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is The Dalles in?
The Dalles is in USDA hardiness zone 8a. In zone 8a, winters are mild — many tender perennials overwinter here.
How long is the growing season in The Dalles?
The Dalles has about 198 frost-free days — a moderate growing season — between the average last spring frost (April 11) and first fall frost (October 26).
When should I plant tomatoes in The Dalles?
For The Dalles, sow tomatoes indoors about February 14–February 28 and move the seedlings out around April 18, after the last spring frost.
Never miss a window in The Dalles
An email when it’s time to start seeds, transplant, and sow — timed to The Dalles’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at THE DALLES MUNI AP, 3 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 The Dalles, OR — Frost Dates & Zone 8a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00024219. Retrieved from https://blissgarden.com/oregon/the-dalles.