Santa Monica weather in August 2025

Expect 28°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Santa Monica in August based on long-term weather averages. There is usually 1 day with some rainfall and 3 mm of average monthly rainfall in August.

• 28
  28°C max day temperature
• 11
  11 hours of sunshine per day
• 1
  1 day with some rainfall
• 17
  17°C min night temperature
• 13
  13 hours of daylight per day
• L
  Low heat & humidity
• 3
  3 mm of monthly rainfall
• 10
  10 (Very High) UV index
• 19
  19°C sea temperature

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The August weather guide for California (Santa Monica) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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Santa Monica August sunrise & sunset times

Browse the sunrise and sunset times for Santa Monica in August 2025. Select a month to view Santa Monica sunrise and sunset times for the next 12 months.

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