Last updated: August 26, 2025
In San Francisco, Mexico, the average temperature in August hovers around 20°C (68°F), making it a pleasant time to enjoy the surroundings. However, be prepared for temperature fluctuations, as it can dip to a minimum of 13°C (56°F) and rise to a maximum of 30°C (86°F). Rainfall is notable during this month, with an average precipitation of 313 mm (12.3 in) spread over 29 days. With an average humidity of 83%, expect a tropical feel in the air!
In August in San Francisco, the average temperature is 20°C (68°F), with maximums reaching up to 30°C (86°F) and minimums dropping as low as 13°C (56°F). It's an ideal time for travelers to enjoy pleasant weather while exploring the sights.
In San Francisco in August, the precipitation amount is 313 mm (12.3 in) distributed over a span of 29 days.
In San Francisco in August humidity is 83%. With an average temperature of 20°C (68°F), this humidity feels like a warm, heavy blanket enveloping you, making it feel much warmer than it is. Traveling in such conditions can be quite taxing, as the air feels thick, often leading to a sense of exhaustion and requiring frequent breaks to seek shade or hydration.
In San Francisco in August, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Francisco.
UV Risk Categories
Weather in San Francisco varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in San Francisco, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 16°C (62°F) | 9 mm (0.3 inches) | 70% | very high |
| February Weather | 17°C (64°F) | 14 mm (0.6 inches) | 65% | extreme |
| March Weather | 19°C (67°F) | 7 mm (0.3 inches) | 59% | extreme |
| April Weather | 21°C (69°F) | 3 mm (0.1 inches) | 60% | extreme |
| May Weather | 22°C (71°F) | 43 mm (1.7 inches) | 67% | extreme |
| June Weather | 21°C (70°F) | 207 mm (8.1 inches) | 80% | extreme |
| July Weather | 20°C (68°F) | 280 mm (11.0 inches) | 81% | extreme |
| August Weather | 20°C (68°F) | 313 mm (12.3 inches) | 83% | extreme |
| September Weather | 20°C (68°F) | 278 mm (10.9 inches) | 83% | extreme |
| October Weather | 19°C (67°F) | 139 mm (5.5 inches) | 80% | extreme |
| November Weather | 18°C (65°F) | 34 mm (1.3 inches) | 77% | very high |
| December Weather | 16°C (62°F) | 7 mm (0.3 inches) | 76% | very high |