Short Answer
Does it rain more in Seattle or London?
Seattle gets more total annual rain than London, but London often feels wetter because its gray, drizzly days are spread differently through the year. The comparison depends on whether you care about inches of rain, rainy-day frequency, or daily lived experience.
- Best for total rainfall: Seattle.
- Best for "constant damp gray" perception: London can feel closer than the totals suggest.
- Best next step: compare rainfall, daylight, and seasonal temperatures side by side.
London owns the umbrella stereotype. Seattle records more precipitation.
Using comparable 1991–2020 station normals, the Met Office reports about 615 millimeters of annual precipitation at Heathrow. NOAA reports roughly 39 inches—about 1,000 millimeters—at Seattle–Tacoma International Airport. The exact number changes with the station, but the conclusion does not: the Seattle area receives substantially more water.
Why the Reputation Still Feels Close
Annual totals describe volume, not experience. London’s Heathrow normal includes about 112 days a year with at least one millimeter of rain. Seattle’s cool season is dominated by frequent Pacific weather systems, low clouds, and light precipitation. A place can therefore feel persistently damp without producing Gulf Coast–style downpours.
Seattle is also not simply “soaked by the Olympic Mountains.” The Olympics create strong local rain shadows and wet windward slopes; Seattle’s own pattern reflects its position between that range and the Cascades, plus the steady arrival of cool-season Pacific storms.
Compare Like With Like
Climate normals are station records, not perfectly bounded city averages. Heathrow and Sea–Tac are useful metropolitan reference points, but neighborhoods and nearby terrain can differ.
Rainfall Is Not Gloom
The useful moving question is not merely “Which city gets more rain?” It is whether you dislike total water, frequent interruptions, low winter light, or heavy storms. London is drier by annual precipitation. Seattle’s reputation survives because weather is experienced as a sequence of days, not a number at the bottom of a table.
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