Last frost date in Seattle, Washington
March 8
Average last frost in spring. In an early year (1 in 10) it's over by February 13; in a late year (1 in 10) it comes after March 29.
November 23
Average first frost in fall. 1 year in 10 it comes by November 4.
Source: NOAA U.S. Climate Normals 1991–2020, station Seattle Sand Pt Wsfo (USW00094290), 6.5 miles from Seattle, elevation 60 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Bellevue, Bothell, Kenmore, Kirkland, Lake Forest Park, Mountlake Terrace, Redmond, Shoreline and Woodinville, so their frost dates are the same as Seattle's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Feb 13 | Mar 8 | Mar 29 |
| First frost in fall | Nov 4 | Nov 23 | Dec 16 |
Frost-free days in an average year: 259
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 4 | Nov 5 |
| Frost (32°F) | Every year | Mar 8 | Nov 23 |
| Hard freeze (28°F) | 10 years in 10 | Feb 11 | Dec 11 |
Nights at 32°F or colder in an average year: 25
What to plant now in Seattle
- Collards plantsAug 25 – Nov 1Now
- BeetsSept 1 – Dec 1Now
- Cabbage plantsSept 1 – Dec 1Now
- CarrotsSept 1 – Nov 1Now
- DandelionSept 1 – Nov 1Now
- Head lettuce plantsSept 1 – Nov 1Now
- Leaf lettuceSept 1 – Nov 1Now
- LeeksSept 1 – Nov 1Now
- Mustard greensSept 1 – Dec 1Now
- Onion seedSept 1 – Nov 1Now
- ParsleySept 1 – Dec 31Now
- RadishesSept 1 – Dec 1Now
- TurnipsSept 1 – Nov 15Now
- Corn saladOct 1 – Dec 1Now
- Garden peasOct 1 – Dec 1Now
- Onion plants plantsOct 1 – Dec 31Now
- SpinachOct 1 – Dec 1Now
- Upland cressOct 1 – Dec 1Now
- Chervil and chivesNov 1 – Dec 31Soon
- Onion setsNov 1 – Dec 31Soon
- Spring planting calendar for an average last frost around March 10 Seattle: March 8
- Fall planting calendar for an average first frost around November 20 Seattle: November 23
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Washington
- Mercer Island 7 mi · last frost Mar 13
- Burien 10 mi · last frost Mar 2
- Renton 12 mi · last frost Mar 13
- Edmonds 13 mi · last frost Mar 9
- Sammamish 15 mi · last frost Mar 30
Updated