When to plant in East Renton Highlands, WA
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for East Renton Highlands, Washington — all computed from East Renton Highlands's nearest NOAA weather station.
A generous ~248-day season lets East Renton Highlands gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 8b, East Renton Highlands supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
RENTON 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 East Renton Highlands’s own odds, recorded at RENTON MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 25 | Apr 6 | Mar 21 | Oct 17 | Oct 31 | Nov 17 |
| 32°F | Mar 31 | Mar 13 | Feb 19 | Oct 29 | Nov 16 | Dec 9 |
| 28°F | Mar 6 | Feb 13 | Jan 1 | Nov 11 | Dec 6 | Jan 9 |
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 East Renton Highlands, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 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.
East Renton Highlands planting FAQ
When is the last spring frost in East Renton Highlands, WA?
Plan for the last spring frost in East Renton Highlands around March 13 (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 East Renton Highlands, WA?
In East Renton Highlands, the first 32°F freeze of fall lands around November 16 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is East Renton Highlands in?
East Renton Highlands is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in East Renton Highlands?
East Renton Highlands has about 248 frost-free days — a long growing season — between the average last spring frost (March 13) and first fall frost (November 16).
When should I plant tomatoes in East Renton Highlands?
For East Renton Highlands, sow tomatoes indoors about January 16–January 30 and move the seedlings out around March 20, after the last spring frost.
Never miss a window in East Renton Highlands
An email when it’s time to start seeds, transplant, and sow — timed to East Renton Highlands’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Fairwood · 5 km
- Renton · 8 km
- Issaquah · 8 km
- Newcastle · 9 km
- Bryn Mawr-Skyway · 12 km
- Covington · 12 km
- Maple Valley · 13 km
- Kent · 13 km
Frost dates recorded at RENTON MUNI AP, 10 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 East Renton Highlands, WA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094248. Retrieved from https://blissgarden.com/washington/east-renton-highlands.