Here in Indiana, we've been fluctuating between 30F and -10F (peaks are around 40 and -15; but yeah). And like half of inch of snow, at the minimum, every week. We pretty much get a round of precipitation once or twice a week, accompanied by fluctuations of temperature. Basically warms up, snows/ice/rains, drops down to negatives, warm up, snow/ice/rain, and rinse and repeat until we hit spring (where it's the same with temp fluctuations and a shit ton of rain; it's just the midpoint of fluctuations are slowly going up until we get to summer where somehow all the rain disappears and it's just humid for until we hit autumn).
We pretty much gotten to the point that if it's about 35, there's really no need to wear a coat anymore.