Thousand Oaks (CA) Temperature by Month

Thousand Oaks, California, United States of America has an average annual maximum temperature of 23°C (73°F), ranging from 18°C (64°F) in December to 29°C (84°F) in September. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

The climate in Thousand Oaks is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 16°C (61°F) in September to 8°C (46°F) in December.

The chart below illustrates the average maximum day and minimum night temperatures in Thousand Oaks by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. September, the warmest month, averages 278 hours of sunshine.

The chart below shows the average temperature throughout the year:

Thousand Oaks's average annual maximum temperature is 23°C (73°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Beijing, China averages 20°C (68°F) annually, but with big seasonal swings, very cold winters and hot summers.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Thousand Oaks, December is the coolest month, with average highs of 18°C (64°F) and humidity around 52%, considered moderate. In September, the warmest month, temperatures average 29°C (84°F) with 67% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Thousand Oaks's weather, including monthly rainfall, sunshine hours, and humidity, visit our Thousand Oaks climate page.