Climate of Snowdon (Yr Wyddfa), Wales: Temperate Oceanic

Snowdon (1,085 m), Wales' highest peak, has a temperate oceanic (Cfb) climate modified by altitude:

• Annual avg temp: ~8.6 °C (47.5 °F)
• Summer (July): Avg high ~14.5 °C (58 °F); cool, often misty
• Winter (Jan): Avg low ~3.5 °C (38 °F); frequent freeze-thaw
• Precipitation: ~3,000–5,000 mm/year (very wet); rain year-round, snow in winter
• Snowfall: ~1.27 m (4 ft) annually; snow cover Dec–Apr, but variable
• Wind: Strong, frequent; gusts >100 mph on summit
• Cloud/fog: Summit in cloud ~300 days/year

Maritime influence moderates extremes—no severe cold/heat. Weather changes rapidly; hikers must prepare for all conditions.