Monthly weather forecast and climate
Mill Valley, CA

What are the coldest months in Mill Valley?

January and December, with an average high-temperature of 55.9°F (13.3°C), are the coldest months.

What is the warmest month in Mill Valley?

July is the warmest month, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 53.1°F (11.7°C).
Average daylight - Mill Valley, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.6h).