I live in the Midwest... Illinois.The winter months are really bad for me. It starts in November and finally ends in early April. My brain needs sunlight.
I take a 10 day vacation in the winter in sunny Florida or go on cruises to the Bahama's/Caribbean. This lifts my depression as soon as I land and see the sun. As soon as I get back home it starts up all over again.
My job is working outdoors from early March to middle of November. Rainy days make make really depressed. As soon as the sun comes out I feel much better.
With S.A.D,I gain weight in the winter months, have no desire to exert myself to do anything, go to bed earlier, and live in a fog until April comes around.
There are Light therapy boxes you can use but have never tried one. The only solution is to move to a location that has sunny days and no snow.