In this blog post, we will take a closer look at the annual average number of rainy days in Thousand Oaks, monthly average rainfall, highest recorded rainfall, and climate characteristics.

Annual Average Rainy Days

Thousand Oaks receives an average of about 35 days of rain per year. This is similar to other coastal cities in California and is considered relatively low. Rainfall is mainly concentrated in the winter and early spring, with very little rain during the summer. However, sudden heavy rains can occur during El Niño events or monsoon seasons.

Monthly Average Rainfall

The monthly average rainfall in Thousand Oaks varies greatly depending on the season and monsoon effects. The average rainfall for each month is as follows:

Thousand Oaks

  • January: about 3.0 inches
  • February: about 3.5 inches
  • March: about 2.8 inches
  • April: about 1.5 inches
  • May: about 0.7 inches
  • June: about 0.3 inches
  • July: about 0.0 inches
  • August: about 0.2 inches
  • September: about 0.3 inches
  • October: about 1.2 inches
  • November: about 2.0 inches
  • December: about 3.1 inches

Highest Recorded Rainfall: The highest recorded rainfall in Thousand Oaks occurred during a heavy rain event in January 2005, with 5.6 inches (about 142mm) of rain.

This amount of rainfall resulted from a concentrated downpour over a short period, causing severe flooding and inundation in the area.

The climate of Thousand Oaks features characteristics of a coastal climate, with an annual average of 35 rainy days and monthly average rainfall varying significantly due to seasonal and monsoon influences.

Although the rainfall is relatively low, exceptional heavy rains can have a significant impact on transportation and daily life.