I wouldn't sprint on the pavement.
I'm in the same boat. I'm preparing for track and I live in New England. Here are the options that I am presented with. Running on an outdoor track. Running on an indoor track, Brown University in Providence has an indoor track. Find a gym with an indoor basketball court. Sprinting on an indoor basketball court is fun and there are far more indoor basketball courts than there are indoor tracks.
Now is also a good time to just focus on lower body power. Since you stated that you're preparing for football (you did say football right???) you have plenty of time. A lot of this time can be spent squating, ab work, doing indoor plyos etc.