Redwood City Weather in September

Thinking of visiting Redwood City in September? Expect high temperatures reaching 26°C (79°F) during the day, dropping to 13°C (55°F) at night, with minimal rainfall.

Rainfall in Redwood City in September

Typically around a single day of rainfall are expected, averaging 3.2 mm (0.1 in) for the month. If rain does fall, it tends to be very light and barely worth getting out an umbrella for.

Temperature in Redwood City in September

The temperature in Redwood City in September is excellent. Daytime highs reach 26°C (79°F), with nights dropping to 13°C (55°F). During September, you'll experience the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Redwood City in September

The days are predominantly sunny, with an estimated total of around 270 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Redwood City in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

The water is 14°C (57°F) this month, cool enough to feel refreshing on a warm day, but cold enough that most people won't stay in for long without a wetsuit.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Redwood City.