September · typical climate, not a forecast
Brittany in September
France
Workable
19°C day · 14°C night · 42% rain · 12h daylight · moderate crowds · €1,150 estimated
Live · Brittany
–°C
Reading…
Live · Tallinn (you)
–°C
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Cool Score breakdown
Scored for 5 nights from Tallinn in September.
- Temperature fit92
18.8°C typical high vs your 12–20°C window
w 26 - Heat escape0
2.5°C warmer than Tallinn
w 14 - Rain probability66
42% chance of rain on an average day
w 11 - Daylight hours59
12.3h of daylight mid-month
w 8 - Outdoor conditions77
Comfortable for a full day outside at 18.8°C
w 10 - Crowding59
Moderate crowds for this month
w 8 - Flight + stay cost70
≈€1150 estimated for 5 nights vs €1000 budget
w 12 - Nature access80
8/10 — wild ground within reach
w 6 - City atmosphere76
6/10 urban texture · 10/10 food scene
w 4
Why Brittany in September
The sea keeps it in the low twenties while the south hits 38°C.
- Coastal GR34 path
- Oyster shacks
- Pink granite coast
What September in Brittany is actually like
In September, Brittany sits around 19°C by day and drops to about 14°C after dark, so a light layer earns its place in the bag even in high summer. That is roughly 2°C warmer than Tallinn at the same time of year — the difference between planning your day around the shade and simply walking out of the door.
Expect rain on roughly 42% of days, usually passing rather than persistent, and about 12 hours of daylight to spend outside. Crowds are moderate crowds this month, and a 5-night trip from Tallinn works out at around €1,150 including flights, a mid-range stay and everyday spending.
The sea keeps it in the low twenties while the south hits 38°C. Days here tend to fill up with coastal gr34 path, oyster shacks, pink granite coast — which is why Brittany scores 65 out of 100 for september: workable.
Other months
Compare the typical climate month by month.