October in Niagara Falls is the rainiest month of the year. In October, the weather in Niagara Falls is typically warm. Average daily high temperature in October is about 14 degrees above zero. On average, Niagara Falls has 13 rainy, 8 sunny, 7 partly cloudy, and 3 cloudy days in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Niagara Falls.