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San Francisco — weather by month, water temperature
The air temperature by month
The average maximum daily temperature — 19.5°C in September. Average maximum night temperature — 14°C in October. The average minimum daily temperature — 13°C December. The average minimum night temperature — 9.9°C in January.
The water temperature by month
Average maximum temperature of the water — 15.6°C fixed in August. The average minimum temperature of the water — 11.1°C fixed in January.
Maximum precipitation — 69.9 mm It was recorded December. Minimum precipitation — 3.4 mm It was recorded in September.