Ogwen Valley Ascent – Weather Forecast
Category 4Pentir, Cymru / Wales, GB
This page shows a route-based weather forecast for the Ogwen Valley Ascent cycling climb in Pentir, Cymru / Wales, GB. 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.
Ogwen Valley Ascent
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
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← 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 30 Aug 09:02
Climate Overview
| Month |
Temp Day
|
Temp Night
|
Sunny Days
|
Sun Hours
|
Rain Days
|
Precipitation
|
Humidity
|
UV Index
|
Day Length
|
|---|---|---|---|---|---|---|---|---|---|
| Jan | 6°C | 1°C | 9 | 3.7h | 23 | 179 mm | 75 % | 2 | 8h 12m |
| Feb | 7°C | 3°C | 14 | 5.5h | 19 | 91 mm | 73 % | 3 | 9h 52m |
| Mar | 11°C | 4°C | 25 | 8.7h | 12 | 47 mm | 70 % | 4 | 11h 54m |
| Apr | 14°C | 6°C | 24 | 9.7h | 15 | 101 mm | 68 % | 5 | 14h 1m |
| May | 16°C | 8°C | 27 | 12.2h | 15 | 77 mm | 65 % | 6 | 15h 53m |
| Jun | 17°C | 12°C | 23 | 10.1h | 24 | 183 mm | 67 % | 7 | 16h 52m |
| Jul | 19°C | 13°C | 26 | 10.8h | 25 | 128 mm | 66 % | 8 | 16h 21m |
| Aug | 19°C | 13°C | 29 | 11.3h | 17 | 74 mm | 68 % | 7 | 14h 41m |
| Sep | 15°C | 10°C | 20 | 7.7h | 25 | 219 mm | 70 % | 5 | 12h 38m |
| Oct | 13°C | 8°C | 16 | 5.3h | 22 | 161 mm | 72 % | 4 | 10h 33m |
| Nov | 10°C | 6°C | 12 | 4.1h | 26 | 242 mm | 76 % | 2 | 8h 39m |
| Dec | 8°C | 5°C | 10 | 4.0h | 19 | 208 mm | 77 % | 2 | 7h 38m |