While "best" weather is subjective in a land known for its four-seasons-in-a-day climate, May and September are widely considered the ideal months. May offers the highest probability of clear skies, lower rainfall, and the longest daylight hours as the country approaches the summer solstice. It is also the sweet spot before the peak summer crowds arrive and, crucially, before the biting midges (tiny flies) become prevalent in the Highlands. September provides a similar balance of mild temperatures and beautiful autumn colors as the landscape turns to gold. While July and August are the warmest months with average highs around 15°C to 17°C, they are also the wettest and most crowded. For travelers in 2026, May remains the premier choice for outdoor activities like hiking the West Highland Way, as the spring blossoms are in full bloom and the air is crisp and fresh without the intense chill of the Scottish winter.