San Francisco
United States
A foggy, hilly peninsula celebrated for its Victorian architecture, historic cable cars, and culinary innovation.
Warmest month is September at 24°C on average. Coolest is December at 14°C. Driest reading falls in June with 0 rain days.
Six lead datapoints
- CoffeeCurated by Hugo$5.50 (~$5.50)Editorial override: SF premium over US baseline.
- BeerCurated by Hugo$8.50 (~$8.50)Editorial override: SF premium over US baseline.
- Flight timeMethodology11h 30m from London HeathrowGreat-circle plus routing overhead.
- Flight CO2eDEFRA 2024 factors3,284 kg return from London HeathrowDEFRA 2024 economy factors, includes radiative forcing.
- FCDO advisorygov.uk, snapshot compiled 2026-07-11No specific FCDO warnings against travel.Check the latest FCDO advice before booking.
- Tap waterCDC / WHO guidanceTap water is generally safe to drink.
| Month | Avg high | Swing | Rain days |
|---|---|---|---|
| January | 15° | ±3° | 9 |
| February | 16° | ±4° | 7 |
| March | 17° | ±4° | 10 |
| April | 18° | ±4° | 4 |
| May | 20° | ±4° | 1 |
| June | 22° | ±4° | 0 |
| July | 22° | ±3° | 0 |
| August | 23° | ±4° | 0 |
| September | 24° | ±5° | 0 |
| October | 22° | ±5° | 2 |
| November | 18° | ±3° | 6 |
| December | 14° | ±3° | 8 |
What to do
- Cycle across the Golden Gate Bridge
- Tour Alcatraz Island
- Eat clam chowder at Fisherman's Wharf
- Ride a historic cable car
How we know this
Values are the average of the last ten calendar years of daily readings from Visual Crossing, snapped to the destination cluster. Swing is the p10 to p90 range of daily highs, halved for the ± figure. Rain days count any day with at least 1 mm of precipitation.