... including targeted forecasts at the time of your arrival to each point!
The I-5 runs north-south about 70 miles west of North Cascades National Park.
North Cascades National Park has a continental climate. In the summer it is warm and dry, and in the winter it is cold and wet. The average annual temperature for North Cascades National Park is 16° degrees and there is about 184 inch of rain in a year. It is dry for 140 days a year with an average humidity of 84% and an UV-index of 2.
August has an average maximum temperature of 23°C (73°F) and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 8°C (46°F).
Snow covers the ground more than six months out of the year, even at lower elevations, and State Route 20, the only highway through the park, is generally closed from late November until late April. Numerous avalanche chutes, as many as traverse any state or federal highway, and including some over 2,000 ft (610 m) long, cross the highway and make snow removal during that period infeasible. Heavy snow and frequent avalanches are common, especially on the western slopes, from autumn to spring. The high elevation trails are generally open by mid-summer and the majority of tourism is between mid-June and late September.
The park was established in 1968.
This map shows the current & 7-day weather forecast, weather alerts, and weather radar for North Cascades National Park.