Weather in Jasper National Park
Jasper National Park is approximately 11,000 square km (6835 sq. miles) and across this area the temperature and weather patterns can be drastically different. If it is snowing at the east Jasper Park Gate it may be sunny and mild in the town.
When travelling to the mountains you should be prepared to face any type of weather.
Spring weather begins around mid-April in the valley area. The higher altitudes are generally warm and snow-free by mid-June. Summer temperatures are generally around +20C (68F) during the day and drop to around +10C (50F) overnight. Winter weather can be expected from October to March, although early autumn or late spring snowfall is always a possibility.
During the coldest months (December through February) temperatures can rise to -10C (50F) during the day and drop to -20C (-4F) overnight. Jasper receives the majority of its snowfall December through February, roughly 10 inches per month. During the winter months the average snowpack in Jasper is around 23cm (9 inches). Snowpack is the amount of snow that accumulates in a region over a season.
Other factors contribute to Jasper’s weather, such as mountain terrain, elevation, latitude, shading from mountains and glaciers. Altitude (elevation) has a large impact on climate and temperature. On average you will lose 1.7C in temperature for every 300m of elevation gained.
The weather can change very quickly in the mountains. This can mean a sudden temperature drop, rain, snow or strong winds. To prepare for the change in weather by pack warm clothes, waterproof or windproof jackets, hats and gloves.
Many guests and residents of Jasper National Park wear knitted hats (known as toques) all year.