Like you, my winter was going great until February hit. I rode my most miles ever for a January, nearly 800, and was on pace to do so in mid-February. Then we had a series of winter storms that made it difficult to ride at all during the last two weeks of the month. I got back on track in March, topping 800 miles for the month yesterday with another day of riding to go.
I had to ride in a lot of marginal weather this winter to keep my mileage up. I don't do snow or ice, but rode on a lot of days when it was raining, foggy and very windy. I am really going to appreciate the return of warmer and hopefully drier weather. It has started getting warmer here, interspersed with cold, wet and windy days.