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San Diego — weather by month, water temperature
The air temperature by month
The average maximum daily temperature — 26.5°C in August. Average maximum night temperature — 18.8°C in September. The average minimum daily temperature — 17.5°C December. The average minimum night temperature — 10.6°C December.
The water temperature by month
Average maximum temperature of the water — 21.2°C fixed in August. The average minimum temperature of the water — 15°C fixed in January.
Maximum precipitation — 25 mm It was recorded in July. Minimum precipitation — 2.6 mm It was recorded in September.