Compare the mountain weather on Yr Wyddfa, Cadair Idris and Pen y Fan before choosing a day for the Welsh Three Peaks.
Every summit is shown side by side. The combined grade gives extra weight to the weakest forecast.
A grey, cloudy day on Snowdon - Yr Wyddfa: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A rough, clagged-in day on Cadair Idris - Penygadair: summit wind broadly 20-40 mph, with gusts 40-50 mph during the evening (gale-force winds).
A grey, cloudy day on Pen y Fan: summit wind broadly 20-35 mph, with gusts 35-45 mph during the evening (gale-force winds).
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
The Welsh Three Peaks Challenge links three iconic mountains across north, mid and south Wales. Because the summits are widely separated, the forecast can vary far more than a single Wales-wide weather summary suggests.
Treat the combined grade as a quick comparison, then read each mountain row. A good forecast on one summit does not imply similar wind, cloud or rain on the other two.
Read Welsh Three Peaks route information