What's the weather like in California in September?In September the west coast state of California is warm and dry, making this a great time of year to visit the likes of Los Angeles and San Francisco. If you prefer to escape the high season crowds, September is a good month for exploring the cities, relaxing on the beach, and enjoying the nightlife as the autumnal weather is nice and warm.
AveragesIn Los Angeles, daytime averages in September hover around 21°C, with highs of up to 27°C making sun cream essential. At night the temperature dips to a cool yet pleasant 14°C, so bring layers with you to wrap up warm in the evening. With just 5mm of rain expected over the course of the month, September is very dry, while the sea’s still a mild 20°C. Further up the coast in San Francisco, things are much cooler with an average daytime temperature of 14°C and highs of 21°C. The weather’s still very dry, while the days are getting shorter as the autumn gets into full swing.