January in Niagara Falls is the snowiest, the windiest, the cloudiest, and the most freezing month of the year. In January, the weather in Niagara Falls is typically freezing. Average daily high temperature in January is about 1 degree below zero. On average, Niagara Falls has 15 snowy, 11 cloudy, and 5 rainy days in January. The snowfalls are usually light.