Bosse de Berrien – Weather Forecast
Category 4Berrien, Bretagne, FR
This page shows a route-based weather forecast for the Bosse de Berrien cycling climb in Berrien, Bretagne, FR. Unlike a simple location forecast, conditions are calculated at every point along the climb — from the base to the summit — using the actual route profile and elevation data.
You'll see hour-by-hour temperature, wind speed and direction, precipitation probability, and cloud cover adjusted for altitude. Choose your planned departure time to align the forecast with your ride.
Bosse de Berrien
Plan Your Ride
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Calculating weather along route...
Trip Summary
Forecast A
Trip Summary A
Forecast B
Trip Summary B
Weather Display Options
Forecast A - Route Map
Forecast B - Route Map
Compare Reversed Route
Same departure time & speed — opposite direction
→ Original Direction
← Reversed Direction
Creates a new saved route in the reversed direction
Route Map
Elevation Profile
Temperature Along Route
Precipitation & Precipitation Probability Along Route
Wind Along Route
Humidity Along Route
Pollen Along Route
UV Index Along Route
Start place details
Weather Forecast
Hourly around Sun 18 Oct 14:37
Climate Overview
| Month |
Temp Day
|
Temp Night
|
Sunny Days
|
Sun Hours
|
Rain Days
|
Precipitation
|
Humidity
|
UV Index
|
Day Length
|
|---|---|---|---|---|---|---|---|---|---|
| Jan | 8°C | 2°C | 13 | 4.1h | 20 | 219 mm | 75 % | 2 | 8h 51m |
| Feb | 9°C | 4°C | 12 | 4.9h | 20 | 81 mm | 73 % | 3 | 10h 14m |
| Mar | 12°C | 5°C | 23 | 7.6h | 19 | 36 mm | 70 % | 4 | 11h 56m |
| Apr | 16°C | 7°C | 25 | 9.3h | 17 | 110 mm | 68 % | 5 | 13h 42m |
| May | 17°C | 9°C | 29 | 11.3h | 19 | 60 mm | 65 % | 6 | 15h 14m |
| Jun | 21°C | 13°C | 25 | 10.9h | 19 | 73 mm | 67 % | 7 | 16h 2m |
| Jul | 21°C | 13°C | 25 | 10.7h | 21 | 64 mm | 66 % | 8 | 15h 37m |
| Aug | 22°C | 14°C | 27 | 11.1h | 14 | 90 mm | 68 % | 7 | 14h 15m |
| Sep | 17°C | 11°C | 26 | 9.2h | 21 | 84 mm | 70 % | 5 | 12h 33m |
| Oct | 15°C | 9°C | 19 | 6.7h | 16 | 111 mm | 72 % | 4 | 10h 47m |
| Nov | 12°C | 7°C | 13 | 5.3h | 26 | 114 mm | 76 % | 2 | 9h 13m |
| Dec | 9°C | 4°C | 16 | 4.5h | 19 | 141 mm | 77 % | 2 | 8h 23m |