San Francisco from Lisbon
9,121 km, about 12h 02m in the air. Every month scored for the weather at San Francisco and for the holidays that crowd it out at both ends.
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No fare history on LIS–SFO yet, so this ranking is climate and crowds only. The price column fills in as the scanner collects.
Month by month from Lisbon
| Month | Max °C | Rain days | Crowds | Verdict | Why |
|---|---|---|---|---|---|
| Jan | 15° | 8d | 80 | ok | 15C max, 8 rainy days |
| Feb | 15° | 7d | 100 | good | 15C max, 7 rainy days |
| Mar | 16° | 9d | 85 | good | 16C max, 9 rainy days |
| Apr | 17° | 4d | 85 | sweet spot | 17C max, 4 rainy days |
| May | 19° | 2d | 85 | sweet spot | 19C max, 2 rainy days |
| Jun | 21° | 0d | 65 | sweet spot busy | peak: Summer weather attracts tourists to the city's many outdoor… |
| Jul | 21° | 0d | 65 | sweet spot busy | peak: Summer weather attracts tourists to the city's many outdoor… |
| Aug | 23° | 0d | 65 | goodbusy | peak: Summer weather attracts tourists to the city's many outdoor… |
| Sep | 23° | 0d | 85 | sweet spot | 23C max, 0 rainy days |
| Oct | 22° | 1d | 65 | goodbusy | shoulder season |
| Nov | 17° | 5d | 80 | good | 17C max, 5 rainy days |
| Dec | 15° | 9d | 45 | okbusy | peak: Holiday season brings visitors for events and shopping. |
Crowds is a score out of 100 where higher is quieter. It counts public-holiday clusters in PT as well as at San Francisco, 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.
Getting there
| Nonstop flight | a few a week · TAP Air Portugal |
|---|
Flights from AeroDataBox, roads from OpenRouteService, trains and buses from public timetables via Transitous where they exist, ferries from OpenStreetMap contributors (ODbL). Times are typical, not a schedule, and none of this is a fare — the searches below are where prices live.
The year in San Francisco
The climate normals are not available; therefore, some details may vary. Generally, San Francisco has a cool summer fog but can also experience unexpected weather.
| Busiest |
early Jun to late Aug — Summer weather attracts tourists to the city's many outdoor attractions.
early Dec to late Dec — Holiday season brings visitors for events and shopping.
|
|---|---|
| Quieter, still good |
early Mar to late May — Spring offers mild weather and fewer crowds.
early Sep to late Oct — Early fall has pleasant weather and less tourist congestion.
|
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. The busiest and quieter periods here also count toward the crowd score.
The rest of the trip
San Francisco from anywhere · everywhere from Lisbon
Some links above are affiliate links: if you book through one, we may earn a commission at no extra cost to you. It does not affect the scores on this page, which are computed from climate, holiday and fare data before any link is built.