August is a warm summer month in Washington with beautiful weather and light rain. The Pacific coast swarms with visitors from all over the state and the country to enjoy the warm waters. Temperatures average between 50°F (10°C) to 73°F (22.8°C) but vary considerably by altitude and region. The Cascade Mountains region offers cool nights with average low temperatures in the 45°F (7.2°C) to 50°F (10°C) range. A small area east of the Columbia River sees relatively warmer temperatures that cross 100°F (37.8°C). Mount Baker is a popular tourist destination with scenic views and clear skies during the summer. August sees 20 to 25 sunny days, which are perfect for biking, hiking, fishing, and swimming. Campgrounds rarely remain vacant in the spectacular Mount Rainier National Park as the days are comfortable and the nights are cozy. The green landscape with snow-capped mountains in the distance is one of the highlights of mid-summer. Expect an odd thunderstorm in the highlands. Light summer clothing adds to the comfort of the August days in Washington.