Temperature in Brittany in September

Daytime highs, nighttime lows and the warmest cities in Brittany, France this September.

Brittany, France, a region in France, experiences maximum daytime temperatures in September ranging from 18°C (64°F) in Porspoder to 23°C (73°F) in Varennes. Nighttime temperatures generally drop to 12°C (54°F) in Varennes and 15°C (59°F) in Porspoder. September falls during the summer season.

What is the temperature of the different cities in Brittany, France in September?

Explore the map below to discover average September temperatures at the top destinations in Brittany. For a deeper dive, simply click on any destination dot.

Select a Month

Check the conditions for any month of the year.

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

See also: Brittany weather by month.

Best Places to Visit in Brittany in September

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

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 Brittany

Brittany temperatures in September: frequently asked questions

How hot does it get in Brittany, France in September?

Daytime temperatures in Saint Malo typically peak at 20°C (68°F) in September, putting it in the pleasant range.

How cold does it get at night in Brittany, France in September?

Saint Malo sees nighttime lows close to 14°C (57°F) in September.

What is the warmest city in September in Brittany, France?

Varennes tops the warmest city list in our database with average maximum daytime temperatures around 23°C (73°F) and a minimum nighttime temperature of around 12°C (54°F).

What is the coldest city in September in Brittany, France?

In our database, Porspoder is the chilliest city in September in Brittany, France. Daytime temperatures typically peak at 18°C (64°F), while the nighttime lows hover around 15°C (59°F).

How much sun does Brittany, France get in September?

Saint Malo usually sees around 169 hours of sunlight, indicating a moderately sunny period.

What is the water temperature in September?

The water temperature averages approximately 15°C (59°F) in Brest this month, generally too cold for comfortable swimming.

Interested in more climate information?

We have much more information about the climate in Brittany.

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

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