Brittany in september: average Weather, Temperature and Climate, Where to go?
Weather in Brittany in september 2025
Below, check out the weather forecast for the month of september for most popular cities in Brittany. These predictions are statistics for september from weather reports for over 10 years. The percentage indicates the possibility of having the weather indicated.
Average weather in september in Rennes
good weather
Weather at 6am
54°F
Fog
37% of time
25%
22%
10%
Weather at 12pm
70°F
Clear/Sunny
37% of time
30%
20%
10%
Weather at 6pm
65°F
Clear/Sunny
43% of time
29%
14%
13%
Weather at 3am
54°F
32%
29%
18%
11%
Where to go in Brittany in september?
Where to go in Brittany in september: destination map
perfect weather
good
tolerable
bad
very bad
Where to go in september based on the weather?
| Côtes-d'Armor (Saint-Brieuc (Côtes d'Armor), Perros-Guirec, Erquy...) | 65°F to 70°F | 3 à 4 days | 63°F to 67°F | good weather |
| Finistère (Brest, Quimper, Concarneau...) | 65°F to 70°F | 2 à 5 days | 61°F to 65°F | good weather |
| Ille-et-Vilaine (Rennes, Saint-Malo, Redon...) | 68°F to 72°F | 2 à 4 days | 65°F to 67°F | good weather |
| Morbihan (Vannes, Lorient, The Quiberon peninsula...) | 32°F to 74°F | 0 à 3 days | 65°F to 67°F | good weather* |
Where should you go in Brittany in september when it comes to the weather?
Remember:
The climate in Brittany in september is good across the board.
Good news: It is not perfect, however, the weather in Brittany in september is, on average, good averywhere: in Erquy, Bénodet, Sein island, Perros-Guirec, Fouesnant, Brehat Island, Lannion, Quimper, Dinard, Saint-Malo, Vannes, Belle-Île-en-Mer, Brest, Carnac, The Quiberon peninsula, Rennes, Lorient, Molene Island, Douarnenez, Concarneau and Saint-Brieuc (Côtes d'Armor). I allows to enjoy tours in these cities. And even why not take a little time to sunbathe!
Climate in Brittany in september
Climate in Rennes in september
In the month of september, the mean temperature in Rennes is 63°F (maximum temperature is 72°F and minimum temperature is 54°F). The climate quite comfortable in this location in the month of september. With 1.4in over 2 days, rain may be scarce during your holidays.
With a good weather, september is an advisable month to go in this locality in Brittany.
| September | |||
| Average temperature | 63°F | ||
| Highest temperature | 72°F | ||
| Lowest temperature | 54°F | ||
| Rainfall | 1.4in | ||
| Number of days with rainfall | 2 day(s) (8%) | ||
| Humidity | 93% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 40% | ||
| Length of day | 12:35 | ||
| Our opinion at whereandwhen.net | good |
Climate in Brest in september
In september, the mean temperature in Brest is 63°F (maximum temperature is 67°F and minimum temperature is 58°F). The climate good in that area in september. With barely 2.4in over 3 days,
it rains very little for your stay.
With good weather conditions, september is a good time to go in that area.
| September | |||
| Average temperature | 63°F | ||
| Highest temperature | 67°F | ||
| Lowest temperature | 58°F | ||
| Sea temperature | 62°F | ||
| Rainfall | 2.4in | ||
| Number of days with rainfall | 3 day(s) (11%) | ||
| Humidity | 88% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 42% | ||
| Length of day | 12:36 | ||
| Our opinion at whereandwhen.net | good |
Climate in Lorient in september
In september, maximum temperature is 68°F and minimum temperature is 58°F (for an average temperature of 63°F). The climate quite pleasant around this city in september. With just 2.2in over 3 days, rainfall is infrequent throughout your holidays.
With a good climate, september is a good month to go there.
| September | |||
| Average temperature | 63°F | ||
| Highest temperature | 68°F | ||
| Lowest temperature | 58°F | ||
| Sea temperature | 65°F | ||
| Rainfall | 2.2in | ||
| Number of days with rainfall | 3 day(s) (12%) | ||
| Humidity | 89% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 34% | ||
| Length of day | 12:35 | ||
| Our opinion at whereandwhen.net | good |
Climate in Redon in september
In the month of september, maximum temperature is 72°F and minimum temperature is 58°F (for an average temperature of 65°F). The climate is enjoyable in this location in this month. With 1.9in over 3 days, rain may be scarce during your stay.
With a good climate, september is a good time to go in this city in Brittany.
| September | |||
| Average temperature | 65°F | ||
| Highest temperature | 72°F | ||
| Lowest temperature | 58°F | ||
| Sea temperature | 66°F | ||
| Rainfall | 1.9in | ||
| Number of days with rainfall | 3 day(s) (10%) | ||
| Humidity | 88% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 31% | ||
| Length of day | 12:35 | ||
| Our opinion at whereandwhen.net | perfect |
Climate in Saint-Brieuc (Côtes d'Armor) in september
In the month of september, maximum temperature is 68°F and minimum temperature is 56°F (for an average temperature of 61°F). The climate quite enjoyable in that area in september. With just 2in over 3 days, rainfall is infrequent during your holidays.
With a good weather, september is an advisable month to go in this city.
| September | |||
| Average temperature | 61°F | ||
| Highest temperature | 68°F | ||
| Lowest temperature | 56°F | ||
| Sea temperature | 65°F | ||
| Rainfall | 2in | ||
| Number of days with rainfall | 3 day(s) (10%) | ||
| Humidity | 91% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 41% | ||
| Length of day | 12:36 | ||
| Our opinion at whereandwhen.net | good |
All cities in Brittany in september
| Rennes in september | good weather |
| Brest in september | good weather |
| Lorient in september | good weather |
| Redon in september | perfect weather |
| Saint-Brieuc (Côtes d'Armor) in september | good weather |
| Saint-Malo in september | good weather |
| Vannes in september | perfect weather |
| Concarneau in september | good weather |
| Dinard in september | good weather |
| Erquy in september | good weather |
| The Quiberon peninsula in september | good weather |
| Perros-Guirec in september | good weather |
| Quimper in september | good weather |
| Arzon in september | good weather |
| Audierne-Esquibien in september | good weather |
| Belle-Île-en-Mer in september | good weather |
| Bénodet in september | good weather |
| Beuzec-Cap-Sizun in september | good weather |
| Billiers in september | perfect weather |
| Cap Fréhel in september | good weather |
| Carantec in september | good weather |
| Carnac in september | perfect weather |
| Cherrueix in september | good weather |
| Cléden-Cap-Sizun in september | good weather |
| Cléder in september | good weather |
| Combrit in september | good weather |
| côte de granit rose (Pink Granite Coast) in september | good weather |
| Le Crouesty in september | perfect weather |
| Damgan in september | perfect weather |
| Dinan in september | good weather |
| Doëlan (Clohars-Carnoët) in september | good weather |
| Douarnenez in september | good weather |
| Erdeven in september | good weather |
| Étables-sur-Mer in september | good weather |
| Fouesnant in september | good weather |
| Fréhel in september | good weather |
| Gâvres in september | perfect weather |
| Goulien in september | good weather |
| Goulven in september | good weather |
| Guerlédan in september | good weather |
| Guidel in september | good weather |
| Guimaëc in september | good weather |
| Guissény in september | good weather |
| Hillion in september | good weather |
| Hirel in september | good weather |
| Molene Island (Île de Molène) in september | good weather |
| Sein island (Île-de-Sein) in september | good weather |
| Hoëdic in september | good weather |
| Houat in september | good weather |
| Île-aux-Moines in september | good weather |
| Île-d'Arz in september | good weather |
| Île-de-Batz in september | good weather |
| Brehat Island (Île de Bréhat) in september | good weather |
| Île-Tudy in september | good weather |
| Glénan in september | good weather |
| Kerlaz in september | good weather |
| Kerlouan in september | good weather |
| La Trinité-sur-Mer in september | good weather |
| Lampaul-Plouarzel in september | good weather |
| Lancieux in september | good weather |
| Landéda in september | good weather |
| Landunvez in september | good weather |
| Lanildut in september | good weather |
| Lannion in september | good weather |
| Lanvéoc in september | good weather |
| Locmaria-Plouzané in september | good weather |
| Locmariaquer in september | good weather |
| Locmiquélic in september | perfect weather |
| Locronan in september | good weather |
| Morlaix in september | good weather |
| Névez in september | good weather |
| Ouessant in september | good weather |
| Paimpol in september | good weather |
| parc naturel régional d’Armorique in september | good weather |
| Pénestin in september | perfect weather |
| Penmarc'h in september | good weather |
| Planguenoual in september | good weather |
| Plestin-les-Grèves in september | good weather |
| Pleubian in september | good weather |
| Pleumeur-Bodou in september | good weather |
| Plévenon in september | good weather |
| Plomeur in september | good weather |
| Plomodiern in september | good weather |
| Plonévez-Porzay in september | good weather |
| Plouézec in september | good weather |
| Plougonvelin in september | good weather |
| Plougoulm in september | good weather |
| Plouha in september | good weather |
| Plouharnel in september | good weather |
| Plouhinec in september | perfect weather |
| Ploumanac’h in september | good weather |
| Ploumoguer in september | good weather |
| Plounéour-Brignogan-plages in september | good weather |
| Plounévez-Lochrist in september | good weather |
| Plovan in september | good weather |
| Plozévet in september | good weather |
| Pointe du Raz in september | good weather |
| Pontrieux in september | good weather |
| Porspoder in september | good weather |
| Port Blanc (Penvénan) in september | good weather |
Weather data for Brittany in september:
Weather data for Brittany in september is derived from an average of the weather forecast since 2009 in Brittany. There is a margin of error and these forecasts are to be considered as general information only. The weather in Brittany can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Brittany.