Thousand Oaks Weather in September

What's the weather like in Thousand Oaks (California) in September 2025?

The climate in Thousand Oaks during September can be summarized as warm and very dry.

September is in the fall / autumn in Thousand Oaks and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 27°C (81°F), whilst at night 14°C (57°F) is normal.

Thousand Oaks weather averages (imperial / metric)
Daytime temperature 27.1°C 80.8°F
Nightly temperature 13.7°C 56.7°F
Average temperature 20.4°C 68.7°F
Daily sunshine 10 hrs
Avg rainfall 4 mm 0.2 ins
Rainy days 2 days
Sea temperature 18.6°C 65.5°F
Humidity 69%
Windspeed 11.5kph 7 mph

On average September is the 4th driest month of the year in Thousand Oaks with around 4mm 0.2 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 10 hours of sunshine per day.

September temperatures in Thousand Oaks

Thousand Oaks average temperature in September

September rainfall

Thousand Oaks average rain in September

September hourly sunshine

Thousand Oaks average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Thousand Oaks in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Thousand Oaks weather stats

Thousand Oaks weather statistics
Hottest month: August 27.8°C 82°F
Driest month: July 1mm 0ins
Sunniest month: August 11.4hrs
Coldest month: December 17.8°C 64°F
Wettest month: January 91mm 3.6ins
Map showing location of Thousand Oaks (34.17056, -118.83759) Thousand Oaks map pin © Google

Locations nearby

Top United States locations