Moving from Los Angeles to Seattle
A climate comparison of two homes: California to Washington. The dates below come from the nearest official weather station to each place.
Climate Match
Your last spring frost moves from December 31 to March 13, 293 days earlier.
Los Angeles, CA to Seattle, WA
The full comparison
| Measure | From | To | Change |
|---|---|---|---|
| Last spring frost | December 31 | March 13 | 293 days earlier |
| Frost-free season | 365 days | 247 days | 118 days shorter |
| Coldest month | 13C in December | 6C in December | 8C colder |
| Warmest month | 26C in August | 20C in August | 6C cooler |
Moving from Los Angeles to Seattle reshapes the home year. Winters get 8C colder. Summers get 6C cooler. Your growing season is 118 days shorter. Plan on a new rhythm for the house and garden.
What changes about the house
- Heating: expect a longer or deeper heating season. Service the furnace or boiler before the first cold snap, and budget for higher heating bills.
- Garden: a longer frost-free season opens more crop choices and succession sowings. Raised beds warm earlier in spring.
- Garden: a shorter season favors transplants, short-season varieties, and cold frames. Wait for soil to warm before direct sowing.
Season by season
Spring starts earlier
Your last spring frost moves from December 31 to March 13, 293 days earlier. Start planting and outdoor prep sooner.
Summers run cooler
The warmest month goes from 26C in August to 20C in August. Cooler peaks mean less cooling stress, but watch humidity and ventilation.
Winters turn harsher
Winter coldest month goes from 13C in December to 6C in December. Budget for more heating, snow removal, and ice-dam prevention.
Tools for both places
Moving from Los Angeles to Seattle, answered
What is the biggest climate change from Los Angeles to Seattle?
Your last spring frost moves from December 31 to March 13, 293 days earlier. That is the largest shift in the 30-year climate record.
How are these numbers computed?
From official 30-year climate normals at the nearest station to each place: Van Nuys Ap near Los Angeles and Seattle Boeing Fld near Seattle. They are planning averages, not forecasts; local microclimates can run a week or two off the station record.
Does the comparison work in reverse?
Yes. Open the comparison tool and swap the two places; the deltas reverse direction but the match score stays the same.
Method and sources
Temperatures and frost dates are from the 30-year climate normals at Van Nuys Ap (near Los Angeles, CA) and Seattle Boeing Fld (near Seattle, WA). Canadian data is from Environment and Climate Change Canada; United States data is from NOAA NCEI. These are planning averages, not forecasts. See the methodology page for the full calculation.