Situated along the Continental Divide, Glacier National Park encounters numerous types of weather that vary throughout the different areas of the park. During spring, summer and fall, temperatures are quite comfortable and are usually between 64 to 79 degrees F, while winter brings temperatures between 28 and 41 degrees F.
The west side of the park is home to more lush forests and vegetation, and welcomes around 30 inches of precipitation each year while higher elevations regularly receive heavy snowfall. Meanwhile, the more arid east side of the park is known for its strong winds, intense blizzards and copious amounts of sunshine.
Weather in Glacier National Park can change quickly and visitors are well-advised to bring raingear, layers of clothing, proper footwear and water when recreating outside. Temperatures in the park, and in Montana, tend to change quickly and it's always best to be prepared for the evolving weather patterns that occur along the Continental Divide. When visiting the park, keep in mind that even though there may be no snow at lower elevations, you're likely to encounter snowfall at Logan Pass and on many of the higher-elevation trails in Glacier Park.