The month in detail
What to expect in September
Autumn in Brittany is often underrated: 21°C, golden light and declining crowds. An interesting window. Expect rain on 26% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if July (8.2/10) remains theoretically better.
September ranks 4 out of 12 months in Brittany. Compared to August: −3°C daytime, −1.3h of sun per day.
This month's conditions
What it's like in September
UV index
4 · moderate
protect during midday hours
Feels like
comfortable
12°
Daylight
12.3h of daylight
Air quality
good
AQI 25
Compare
Is September the right month?
The best month in Brittany is July (8.2/10), 0.5 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Brittany
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Brittany
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a city break.
Country · France
🗣️LanguageFrench
💶CurrencyEuro (€)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeTemperate
📈Climate trend ⓘStable
🔥Hottest monthAugust · 24°C
❄️Coolest monthJanuary · 9°C
🌧️Rainiest month ⓘNovember · 42%
🏛️ City break
📅Tourist peak seasonJune → August
☔Indoor sights ⓘYear-round
🚇Public transportGood
🛂VisaSchengen · 90 days
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Brittany ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
FranceTemperate climate with a 8.2 → 1.0 gap between best and worst month. 10 years of ERA5 data to choose by project.
48.11°N · 1.68°W
Questions
Frequently asked questions
What is the best time to visit Brittany?
August is the best month with 24.0°C highs, 14.0°C lows, 7.4h of sunshine and 23.0% rainy days. The months of August & July offer comparable conditions.
How many hours of sunshine does Brittany get in August?
Brittany averages 7.4 sunshine hours per day in August. It is the sunniest month with a climate score of 7.7/10.
What is the rainiest month in Brittany?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Brittany in August?
In August, overnight lows reach 14.0°C, while afternoon highs average 24.0°C.
Is Brittany good in winter?
In winter (December-February), Brittany scores 2.0/10 on average — Difficult period — prefer the peak season.. The best month overall remains August with a score of 7.7/10.
When should you avoid Brittany?
January is the most difficult month to visit Brittany, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Do you need sun protection in Brittany in September?
The average UV index reaches 4 in September in Brittany (moderate), with about 12.3h of daylight. Protect during midday hours.