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California Weather in August

In California, August brings very high daytime temperatures around 31°C (88°F), with nights cooling to 19°C (66°F). Expect quite a bit of rainfall this month.

Rainfall in California in August

This month experiences about 8 days of rain according to historical data, averaging 94 mm (3.7 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in California in August

August in California brings typical temperatures with highs around 31°C (88°F) and lows of 19°C (66°F). It's usually most comfortable outside during the morning and later in the day. With lows of 19°C (66°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in California in August

There are approximately 289 hours of sunshine this month, resulting in mostly clear days.

If you prefer enjoying temperate temperatures and rain-free days, May, June, September and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

California Temperature in August

Min Temperature
19°C (66°F)
Max Temperature
31°C (88°F)
Chance of Rain
27%
Precipitation
94 mm (3.7 in)
Rainy days
8 days
Humidity
70% *
Sunshine
289 hours *
Percentage Sunshine
68% *
* Data from: Columbia, the United States of America (41 KM, 25 Miles).

California Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in California - and find the best time to visit.

Best Places in the United States of America in August

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in California in August

Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in California in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Swimming
    9/10
  • Cycling
    7/10
  • Walking
    7/10
  • Camping
    8/10
  • Outdoor sports
    7/10

California 3-Day Forecast

Popular in August

Where to go in August - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.