Typical mountain and low-level wind, temperature, rainfall and sunshine for August.
Historically, August has been one of the more promising parts of the year for high-ground days. Of 1,240 representative high-ground days, 55% were settled for rain and wind, 39% were mixed, and 6% were poor or severe for rain and wind.
Dry days accounted for 57% of the sample. Across the whole year, the settled-day share is 50%, with around 170 wet days, so a region's strongest month should not be mistaken for its usual climate. As a separate check, the Met Office 1991–2020 average at Tredegar is 172 hours of bright sunshine during August. Cloud and views are deliberately kept out of the settled-day score because they vary sharply between individual summits; check the live forecast nearer the trip. These figures describe representative high ground around 886 metres, so coastal and low-level conditions can be milder.
A practical base for the hills
Check dates for an indicative priceExact August prices and availability are checked after you choose a week.Choose the week you are planning to visit and compare the typical mountain weather, then explore the month-by-month picture below.
Across 280 comparable historical hill days, 54% were settled for rain and wind and 5% were poor or severe for rain and wind.
Check the live Bannau Brycheiniog (Brecon Beacons) forecast →August context: 55% of days across the month were settled for rain and wind; 6% were poor or severe for rain and wind. Read the full August guide.
Brecon, at roughly 135 metres, provides a practical low-level reference for Bannau Brycheiniog (Brecon Beacons). Across 1,240 historical days, the typical daytime high was 18.6°C, with warmer days around 20.8°C.
About 57% of days were dry and 57% combined dry weather with lighter winds. Conditions vary across glens, coasts and villages, so this should be used as regional trip-planning guidance rather than a forecast for every location.
Each month has a detailed guide comparing high-ground hill days with typical conditions at a representative valley or low-level trip base.
These are the six week bands with the largest historical share of settled rain-and-wind days. Views are not included; use the live forecast nearer the trip.
Based on ERA5 reanalysis from the Copernicus Climate Change Service for 1986–2025, summarised for representative high-ground and valley locations. These are reconstructed historical conditions, not a continuous summit weather-station record. Sunshine uses separate Met Office 1991–2020 averages.
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
The comparison uses the whole year, rather than putting each region's single best month beside another's typical conditions.