Last updated: June 24, 2025
In October, the average temperature in San Rafael, United States hovers around 11°C (53°F). However, be prepared for a range as temperatures can dip to a chilly -11°C (12°F) or climb to a warm 27°C (81°F). With a precipitation amount of 23 mm (0.9 in) spread over 5 days, and an average humidity of 74%, packing accordingly is key for a comfortable visit!
In October in San Rafael, the average temperature is 11°C (53°F). Maximums can reach 27°C (81°F) and minimums can drop as low as -11°C (12°F). Travelers should be prepared for varying weather conditions, from mild days to chilly nights.
In San Rafael in October, the precipitation amount is 23 mm (0.9 in) over the course of 5 days.
In San Rafael in October humidity is 74%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less inviting and suggesting that travelers should dress in layers to stay warm and comfortable.
In San Rafael in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 October’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 |