I worked in Montana one summer in college, it's not called the "Big Sky" country for nothing, light, as I remember it in a spectacular place called Glacier Park, very strong, air very clear, colors strong.
Where I live in Northern California, near the coast, there is lots of fog, sometimes in the summer too. ( I call it Nature's air conditioning then, it comes in after a few very hot days near or over 100) many days are hazy, some very strong and clear, but mostly the light here is more subtle, and the greens tend toward jade tones, there is some seasonal change, green green hills in the winter, and then golden yellows in the summer, and browns and beige in fall. In Southern California the colors are bright and strong, and the sun more intense. So there is a range here where I live, tending to a bit more subdued.
My work is always affected by the light where I live, but it usually takes about 2 years of living there for it to penetrate, I've been lucky to live in very amazing places, right on the beach in Southern California, Newport Beach, Sarasota Florida(what a dope I was, I practically ignored the birds, and they are spectacular there) Hawaii, Santa Fe New Mexico, Lake Tahoe Nevada, Reno Nevada( high desert country) San Francisco California, Tiburon Calilfornia( on SF Bay) and now the winecountry of Sonoma about 2 hrs, north of San Franciso and 25 miles from beautiful Bodega Bay. Everywhere the light is very different, unique.
What is it like where you live?