B40 Climb – Weather Forecast
Category 3Londonderry, Northern Ireland, GB
This page shows a route-based weather forecast for the B40 Climb cycling climb in Londonderry, Northern Ireland, 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.
B40 Climb
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 Sat 29 Aug 00:58
Climate Overview
| Month |
Temp Day
|
Temp Night
|
Sunny Days
|
Sun Hours
|
Rain Days
|
Precipitation
|
Humidity
|
UV Index
|
Day Length
|
|---|---|---|---|---|---|---|---|---|---|
| Jan | 5°C | 1°C | 11 | 3.9h | 17 | 72 mm | 75 % | 2 | 7h 56m |
| Feb | 7°C | 3°C | 10 | 4.3h | 22 | 85 mm | 73 % | 3 | 9h 44m |
| Mar | 10°C | 4°C | 17 | 6.4h | 19 | 44 mm | 70 % | 4 | 11h 54m |
| Apr | 13°C | 5°C | 22 | 9.5h | 18 | 102 mm | 68 % | 5 | 14h 9m |
| May | 15°C | 7°C | 26 | 12.4h | 15 | 68 mm | 65 % | 6 | 16h 9m |
| Jun | 16°C | 10°C | 21 | 9.3h | 27 | 115 mm | 67 % | 7 | 17h 14m |
| Jul | 18°C | 12°C | 25 | 9.4h | 24 | 101 mm | 66 % | 8 | 16h 40m |
| Aug | 18°C | 12°C | 23 | 9.9h | 23 | 86 mm | 68 % | 7 | 14h 51m |
| Sep | 14°C | 8°C | 20 | 7.5h | 25 | 114 mm | 70 % | 5 | 12h 41m |
| Oct | 12°C | 8°C | 8 | 4.0h | 20 | 186 mm | 72 % | 4 | 10h 27m |
| Nov | 8°C | 4°C | 10 | 4.1h | 23 | 130 mm | 76 % | 2 | 8h 25m |
| Dec | 7°C | 3°C | 8 | 3.3h | 19 | 121 mm | 77 % | 2 | 7h 18m |