Where to get weather info, before coming to Glacier National Park? From Montreal, best way to reach GNP,is by air, or car?

I was in East Glacier a week ago and had spotty service. The lodge has WiFi. I looked up weather service for East Glacier on an app called Arcus. The closest airport is Kalispell which is 88 miles away. Car is best to get around in the park. Maybe fly in and rent a car would work. Amtrak stops in front of the lodge. The elevation is different throughout the park and weather could be cooler higher up.

I use the Weather Channel app located to Kalispell, Montana for the weather. There is no or extremely sporadic cell service inside the park so check the weather before entering the park. I would strongly suggest that you will need a car to see this park. You can take the USNPS shuttles or pay to ride in the red cars on the Going-To-The-Sun road but just getting to the park would require a car. If you wanted to explore other parts of the park you will need a car.