If you have been thinking of choosing flowers for a wedding in winters, you a lot of beautiful choices. Flowers, like alstromeria, amaryllis, carnation. chrysanthemums, gerbera daisy, lily, narcissus, orchid, or statice are all winter flowers. Pink is normally the preferred choice for weddings and most of these flowers are available in light pink.
Even white roses are good when it comes to winters as they match with the snow around you. You may even prefer roses but they could be pretty expensive for your budget.
You could even opt for willow branches that smell nice and comes in pink. Do check for spring flowers, they might actually be available during winters. Also, hyacinths are a great choice too.
A more popular flower is Sweetpeas (that come in white and pink) and considered to be a feminine flower, a good complement to roses and very sweet. Another option could be Gardenia.
With so many varieties in hand it is really justified to get confused on which flowers to actually pick ;)