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Photo: Caleb Riston, Unsplash.
Seattle from Zurich
8,426 km, about 11h 12m in the air. Every month scored for the weather at Seattle and for the holidays that crowd it out at both ends.
- JanJSeattle in January: avoid
- FebFSeattle in February: avoid
- MarMSeattle in March: ok
- AprASeattle in April: ok
- MayMSeattle in May: sweet spot
- JunJSeattle in June: sweet spot, busy
- JulJSeattle in July: sweet spot, busy
- AugASeattle in August: sweet spot, busy
- SepSSeattle in September: good, busy
- OctOSeattle in October: ok
- NovNSeattle in November: avoid
- DecDSeattle in December: avoid
- Sweet spot
- Good
- OK
- Avoid
- Busy
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Month by month from Zurich
No fare history on ZRH–SEA yet, so this ranking is climate and crowds only. The price column fills in as the scanner collects.
| Month | Max °C | Rain days | Crowds | Verdict | Why |
|---|---|---|---|---|---|
| Jan | 8° | 15d | 80 | avoid | 8C max, 15 rainy days |
| Feb | 8° | 12d | 100 | avoid | 8C max, 12 rainy days |
| Mar | 11° | 13d | 100 | ok | 11C max, 13 rainy days |
| Apr | 14° | 11d | 80 | ok | 14C max, 11 rainy days |
| May | 18° | 8d | 82 | sweet spot | 18C max, 8 rainy days |
| Jun | 21° | 6d | 65 | sweet spot busy | busier than usual |
| Jul | 25° | 2d | 65 | sweet spot busy | busier than usual |
| Aug | 25° | 3d | 65 | sweet spot busy | busier than usual |
| Sep | 21° | 7d | 55 | goodbusy | busier than usual |
| Oct | 15° | 11d | 80 | ok | 15C max, 11 rainy days |
| Nov | 10° | 16d | 80 | avoid | 10C max, 16 rainy days |
| Dec | 8° | 17d | 80 | avoid | monsoon: 17 rainy days, 189mm |
Rain days are the days with at least 1 mm of rain, as a weather station counts them.
Crowds is a score out of 100 where higher is quieter. It counts public-holiday clusters in CH as well as at Seattle, which is why this table differs from the same one read from another country. A busy month is a crowded one, not a bad one — usually it is crowded because the weather is good. Crowds alone never make a month “avoid”: that is reserved for weather worth skipping.
How busy it gets
The year in Seattle
Seattle experiences a temperate maritime climate, characterized by cool, wet winters and warm, dry summers. Travelers should be prepared for unpredictable weather, especially in the shoulder seasons.
| Busiest |
mid Jun to mid Sep — This period features the warmest weather and longest days, attracting the highest number of tourists.
|
|---|---|
| Quieter, still good |
early May to mid Jun — Late spring offers pleasant weather with fewer tourists.
mid Sep to mid Oct — Early autumn provides mild temperatures but fewer visitors compared to summer.
|
Written by a language model from the climate figures above. The month-by-month table is measured — ten years of ERA5 readings and published holiday calendars — and where the two disagree, the table is the one to believe.
Seattle from anywhere · everywhere from Zurich
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