January in San Diego typically offers mild, dry weather. Average high temperatures range from the mid-60s to low 70s Fahrenheit (18-22 Celsius), while overnight lows average in the mid-40s to low 50s Fahrenheit (7-10 Celsius). Rainfall is relatively low, averaging around two inches for the entire month, though occasional storms can bring heavier precipitation. Sunshine is abundant, averaging around seven hours per day.
This pleasant climate makes January an attractive time to visit San Diego. Outdoor activities, from hiking and biking to exploring beaches and parks, remain accessible and enjoyable. The lower rainfall and comfortable temperatures create ideal conditions for sightseeing and experiencing the region’s diverse attractions. Historically, this period represents a quieter season compared to the summer months, offering a potentially more relaxed experience for visitors.
