Brittany · AutumnMonth summary
Brittany weather in September
✅ Good
🌡️ Temperature min / max
55°F – 70°F
🌧 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: Favourable conditions in September (7.4/10). July scores higher but the gap is small.
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
Autumn in Brittany is often underrated: 21°F, 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.
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All months for Brittany
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌦️ January | 37°F | 48°F | 43% | 0.1in | 3.9h | 3.5/10 |
| 🌦️ February | 39°F | 52°F | 38% | 0.1in | 6.3h | 4.4/10 |
| 🌦️ March | 41°F | 54°F | 45% | 0.1in | 8.2h | 4.6/10 |
| ⛅ April | 43°F | 59°F | 36% | 0.1in | 11.4h | 7.0/10 |
| 🌤️ May | 50°F | 66°F | 39% | 0.1in | 11.9h | 7.3/10 |
| 🌤️ June | 55°F | 72°F | 38% | 0.1in | 12.5h | 7.7/10 |
| 🌤️ July | 57°F | 73°F | 30% | 0.1in | 12.9h | 8.2/10 |
| 🌤️ August | 57°F | 75°F | 28% | 0.1in | 11.8h | 8.2/10 |
| 🌤️ September | 55°F | 70°F | 34% | 0.1in | 10.1h | 7.4/10 |
| ⛅ October | 50°F | 63°F | 39% | 0.1in | 7.8h | 7.0/10 |
| 🌦️ November | 43°F | 55°F | 45% | 0.1in | 5.7h | 4.3/10 |
| 🌦️ December | 41°F | 50°F | 42% | 0.1in | 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 70°F, 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°F
- 🌧 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 70°F max and 10.1h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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Activities & tours
Activities and tours in Brittany
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