Temperature in Marin County in September

Daytime highs, nighttime lows and the warmest cities in Marin County, the United States of America this September.

Marin County, the United States of America, a region in the United States of America, experiences maximum daytime temperatures in September ranging from 21°C (70°F) in Sausalito to 28°C (82°F) in Novato. Nighttime temperatures generally drop to 11°C (52°F) in Novato and 13°C (55°F) in Sausalito. During September, summer is in full swing. On average, September is the warmest month of the year in Marin County, the United States of America. So be prepared and pack summer clothes.

What is the temperature of the different cities in Marin County, the United States of America in September?

To get a sense of September's typical temperatures in the key spots of Marin County, explore the map below. Click on a point for an in-depth look.

Select a Month

Check the conditions for any month of the year.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

For a detailed overview over the year and the best time to visit Marin County, check out our Marin County's climate page.

See also: Marin County weather by month.

Best Places to Visit in Marin County in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Marin County.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

See all September weather averages, cities and regions in Marin County

Marin County temperatures in September: frequently asked questions

How hot does it get in Marin County, the United States of America in September?

Expect daytime temperatures around 28°C (82°F) in Novato. That makes September a high month for Marin County, the United States of America.

How cold does it get at night in Marin County, the United States of America in September?

After dark, Novato cools to about 11°C (52°F) on an average September night.

What is the warmest city in September in Marin County, the United States of America?

From a thorough analysis of our records, Novato clearly dominates in terms of high temperatures. The city witnesses daytime temperatures hovering around 28°C (82°F), and evenings that remain near 11°C (52°F).

What is the coldest city in September in Marin County, the United States of America?

For the month of September, Sausalito is the most temperate city in Marin County, the United States of America based on our records. Highs average 21°C (70°F) and nighttime temperatures dip to around 13°C (55°F).

How much sun does Marin County, the United States of America get in September?

The weather is predominantly sunny, with an estimated total of around 270 hours of sunshine in Novato. This means many sunny days, which creates a cheerful atmosphere during this month.

Interested in more climate information?

We have much more information about the climate in Marin County.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

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