Last updated: June 24, 2025
In August, the average temperature in California, United States hovers around 25°C (77°F), creating a pleasant atmosphere for visitors. Expect a minimum of 13°C (57°F) and the potential for highs reaching a sizzling 37°C (99°F). Rainfall can be expected, with 106 mm (4.2 in) spread over 11 days, contributing to an average humidity of 78%. Whether you’re soaking up the sun or dancing in the rain, California offers a delightful climate this month!
In August in California, the average temperature is 25°C (77°F). Maximums can reach 37°C (99°F), while minimums can be as low as 13°C (57°F). It's advisable to pack both light clothing for the warm days and a sweater for the cooler evenings when traveling during this time.
In California in August, the precipitation amount is 106 mm (4.2 in) spread over a duration of 11 days.
In California in August, humidity is 78%. With an average temperature of 25°C (77°F), this humidity feels like walking through a warm, damp blanket, making travel feel a bit more exhausting and sticky as you navigate the sights.
In California in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in California.
UV Risk Categories
Weather in California varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in California, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (33°F) | 68 mm (2.7 inches) | 80% | moderate |
| February Weather | 1°C (35°F) | 60 mm (2.4 inches) | 78% | moderate |
| March Weather | 8°C (47°F) | 114 mm (4.5 inches) | 75% | high |
| April Weather | 12°C (55°F) | 124 mm (4.9 inches) | 77% | very high |
| May Weather | 19°C (67°F) | 175 mm (6.9 inches) | 82% | very high |
| June Weather | 25°C (77°F) | 113 mm (4.4 inches) | 83% | extreme |
| July Weather | 26°C (80°F) | 115 mm (4.5 inches) | 81% | extreme |
| August Weather | 25°C (77°F) | 106 mm (4.2 inches) | 78% | very high |
| September Weather | 22°C (73°F) | 61 mm (2.4 inches) | 72% | very high |
| October Weather | 14°C (58°F) | 107 mm (4.2 inches) | 72% | high |
| November Weather | 7°C (45°F) | 56 mm (2.2 inches) | 84% | moderate |
| December Weather | 4°C (39°F) | 38 mm (1.5 inches) | 86% | moderate |