Mill Valley weather in September (California, United States of America)
How is the weather in Mill Valley in September? This guide provides all the details you need.
In Mill Valley the weather in September is generally perfect, characterized by high temperatures and low rainfall. Throughout the day, temperatures typically settle at around 24°C. But by evening, they drop to around 12°C. On average, it has the peak temperatures of the year.
Mill Valley in September usually receives low rainfall, averaging around 5 mm for the month. Delving into the climate records from the past 30 years, one can predict that nearly 2 days of the month will see rainfall.
The days are predominantly sunny, with an estimated total of around 270 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.
If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. May, June, July, August, September and October generally stand out with the best circumstances. While January, February and December tend to showcase less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Mill Valley climate page with graphs.
Mill Valley, monthly averages in September
Min Temperature
12°C
Max Temperature
24°C
Chance of Rain
7%
Precipitation
5 mm
Rainy days
2 days
Humidity
73% *
Sunshine
270 hours *
Percentage Sunshine
73% *
Where to go in the United States of America in September
Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Mill Valley in September?
For visitors traveling to Mill Valley, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Mill Valley.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
