Last updated: June 24, 2025
In San Rafael, United States during August, the average temperature hovers around 21°C (70°F), with minimums dipping to 10°C (49°F) and maximums soaring to 33°C (91°F). Expect a precipitation total of 36 mm (1.4 in) spread over 7 days, and enjoy an average humidity level of 46% for a comfortable climate experience.
In August in San Rafael, the average temperature is 21°C (70°F), with a maximum that can reach 33°C (91°F) and a minimum that can drop to as low as 10°C (49°F). This mild climate makes San Rafael an ideal destination for travelers seeking pleasant weather and outdoor activities.
In San Rafael in August, the total precipitation amount is 36 mm (1.4 in) over a span of 7 days.
In San Rafael in August humidity is 46%. With an average temperature of 21°C (70°F), this humidity feels like a pleasant and comfortable environment for traveling, allowing for enjoyable explorations without feeling overly sticky or muggy.
In San Rafael in August, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Rafael.
UV Risk Categories
Weather in San Rafael varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in San Rafael, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 24 mm (1.0 inches) | 81% | moderate |
| February Weather | 1°C (34°F) | 23 mm (0.9 inches) | 83% | high |
| March Weather | 6°C (43°F) | 31 mm (1.2 inches) | 71% | very high |
| April Weather | 10°C (51°F) | 20 mm (0.8 inches) | 61% | extreme |
| May Weather | 15°C (60°F) | 16 mm (0.6 inches) | 48% | extreme |
| June Weather | 22°C (71°F) | 12 mm (0.5 inches) | 36% | extreme |
| July Weather | 22°C (72°F) | 58 mm (2.3 inches) | 37% | extreme |
| August Weather | 21°C (70°F) | 36 mm (1.4 inches) | 46% | extreme |
| September Weather | 18°C (65°F) | 32 mm (1.3 inches) | 62% | extreme |
| October Weather | 11°C (53°F) | 23 mm (0.9 inches) | 74% | very high |
| November Weather | 6°C (42°F) | 14 mm (0.6 inches) | 82% | high |
| December Weather | 0°C (32°F) | 21 mm (0.8 inches) | 82% | moderate |