San Rafael Weather in September

During September, San Rafael experiences high daytime temperatures of 25°C (77°F) and cooler nights around 17°C (63°F). September sits within the rainy season, so expect regular and often heavy rainfall.

Rainfall in San Rafael in September

As part of the rainy season, San Rafael sees around 24 days of rain in September, with an average of 476 mm (19 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.

Temperature in San Rafael in September

In September, expect high temperatures in San Rafael, with highs of 25°C (77°F) and lows of 17°C (63°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 17°C (63°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in San Rafael in September

The area experiences a moderate amount of sunshine, with approximately 149 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.

September in San Rafael can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.