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Weather in September in Brittany

Planning a journey to Brittany this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What is the weather like in Brittany in September?

Brittany is a region in France. September in Brittany generally has temperatures that range from mild to warm, with moderate precipitation. The month of September is in the summer season.

Temperatures

Based on our climate data spanning from 1990-2020, the average maximum temperature is mild in Porspoder at 18°C to warm in Varennes at 23°C. Nighttime temperatures generally drop to 12°C in Varennes and 15°C in Porspoder.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Sixt-sur-Aff with an average of 53 mm to moderate rainfall in Cancale with 85 mm.

Average sunshine

Saint Malo enjoys a balanced 169 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

For specific regional insights in Brittany for September, refer to the map provided below. For an in-depth overview of the yearly weather conditions, do visit our Brittany climate page.

Where to go in Brittany in September

Find more information for the most popular destinations in the Brittany on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in September for the 5 most popular destinations in Brittany?

Saint Malo

In September Saint Malo generally has pleasant temperatures with maximum daytime temperatures around 20°C, minimum nighttime temperatures around 14°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Saint Malo
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
22°C 
16°C 
199 hours 
63 mm 
12 days 
20°C 
14°C 
169 hours 
76 mm 
13 days 
October   >> October
>>  
17°C 
12°C 
115 hours 
99 mm 
15 days 
Climate in Saint Malo

Carnac

In September Carnac generally has pleasant temperatures with maximum daytime temperatures around 20°C, minimum nighttime temperatures around 14°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Carnac
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
22°C 
16°C 
49 mm 
13 days 
20°C 
14°C 
59 mm 
14 days 
October   >> October
>>  
17°C 
12°C 
95 mm 
16 days 
Climate in Carnac

Rennes

In September Rennes generally has high temperatures with maximum daytime temperatures around 22°C, minimum nighttime temperatures around 11°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Rennes
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
25°C 
14°C 
205 hours 
54 mm 
12 days 
22°C 
11°C 
177 hours 
57 mm 
12 days 
October   >> October
>>  
17°C 
9°C 
119 hours 
75 mm 
15 days 
Climate in Rennes

Brest

In September Brest generally has pleasant temperatures with maximum daytime temperatures around 19°C, minimum nighttime temperatures around 13°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Brest
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
21°C 
14°C 
206 hours 
63 mm 
15 days 
19°C 
13°C 
168 hours 
64 mm 
15 days 
October   >> October
>>  
17°C 
11°C 
124 hours 
104 mm 
18 days 
Climate in Brest

Perros-Guirec

In September Perros-Guirec generally has pleasant temperatures with maximum daytime temperatures around 19°C, minimum nighttime temperatures around 14°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Perros-Guirec
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
15°C 
56 mm 
13 days 
19°C 
14°C 
61 mm 
14 days 
October   >> October
>>  
17°C 
12°C 
101 mm 
16 days 
Climate in Perros-Guirec

Is your destination not in the list? Have a look at other destinations in Brittany, in France.

Is September the best time to visit Brittany?

We believe that September is one of the best times to visit Brittany with overall perfect weather in Saint Malo. It's worth noting that weather conditions might differ depending on the location you visit.

Generally speaking, July, August and September provide perfect weather in Saint Malo. The weather in January and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Brittany. Interested in the weather conditions in a specific month? Select the month below.

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  • 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.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.