West Highland Way weather is variable year‑round, shifting between sunshine, showers, breezes, and occasional wintry spells on higher ground. May, June, or July align with longer days, milder temperatures, and widely available services, while midges and busier paths feature on calmer, damp evenings. Spring brings rapid swings from bright intervals to cold rain; late summer into early autumn stays mixed with showers and heather bloom; winter months carry frequent overcast, heavy rain or snow, short daylight, and reduced services on exposed sections.