Brittany · AutumnMonth summary
Brittany weather in September
✅ Good
🌡️ Temperature min / max
13°C – 21°C
🌧 Rainy days
34% of days
☀️ Sunshine
10.1h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.4/10
📅 📅 Best month
July (8.2/10)
Quick decision
Should you visit Brittany in September?
✅ Good
✅ Yes if: you want to explore the city on foot without suffering from heat.
❌ No if: you're looking for a beach destination — water and air are still cool.
Our take: Brittany in September: 21°C and 10.1h of sunshine. Decent, but not the peak.
By trip type
Brittany in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : — No sea access
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in September
🎯 Ideal conditions for families — pleasant weather and outdoor activities accessible Autumn in Brittany is often underrated: 21°C, golden light and declining crowds. An interesting window. Expect rain on 34% of days — a light raincoat in the bag is recommended. Not the best window, but acceptable if dates are constrained. July (8.2/10) is significantly better if possible.
Browse by month
All months for Brittany
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌦️ January | 3°C | 9°C | 43% | 2.8 | 3.9h | 3.5/10 |
| 🌦️ February | 4°C | 11°C | 38% | 2.1 | 6.3h | 4.4/10 |
| 🌦️ March | 5°C | 12°C | 45% | 2.3 | 8.2h | 4.6/10 |
| ⛅ April | 6°C | 15°C | 36% | 1.9 | 11.4h | 7.0/10 |
| 🌤️ May | 10°C | 19°C | 39% | 2.0 | 11.9h | 7.3/10 |
| 🌤️ June | 13°C | 22°C | 38% | 2.7 | 12.5h | 7.7/10 |
| 🌤️ July | 14°C | 23°C | 30% | 1.5 | 12.9h | 8.2/10 |
| 🌤️ August | 14°C | 24°C | 28% | 1.6 | 11.8h | 8.2/10 |
| 🌤️ September | 13°C | 21°C | 34% | 2.1 | 10.1h | 7.4/10 |
| ⛅ October | 10°C | 17°C | 39% | 2.8 | 7.8h | 7.0/10 |
| 🌦️ November | 6°C | 13°C | 45% | 2.8 | 5.7h | 4.3/10 |
| 🌦️ December | 5°C | 10°C | 42% | 2.8 | 4.1h | 4.0/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Brittany averages 21°C, 34% rainy days and 10.1h of sunshine per day. Overall weather score: 7.4/10.
See methodology →
Comparison
September vs July (best month)
The best month is July (score 8.2/10). Difference:
- 🌡️ Max temperature : +2°C
- 🌧 Rainy days : -4%
- ☀️ Sunshine : +2.8h/day
FAQ
FAQ — Brittany in September
Is September a good time to visit Brittany?
September is an acceptable time for Brittany (score 7.4/10). Conditions are decent but not optimal — consider July (8.2/10) if possible.
What to do in Brittany in September?
With 21°C max and 10.1h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
Find a place to stay in Brittany
Find places to stay in Brittany in September
Search on Hotels.com
Activities & tours
Activities and tours in Brittany
Guided tours, skip-the-line tickets and local experiences.
Browse activities on GetYourGuide
Flights
Find a flight to Brittany
Compare flights from all airlines.
Search flights
←
Explore also
Similar destinations in September
🌍 Top destinations
Other top destinations in September
Santiago
Puerto Escondido
Trinidad
Marsa AlamWeather rankings
Compare destinations by weather
Best in EuropeGuides & comparisons