February in Rio Grande is the rainiest and the warmest month of the year. In February, the weather in Rio Grande is typically warm. Average daily high temperature in February is about 25 degrees above zero. On average, Rio Grande has 13 rainy, 11 sunny, 4 partly cloudy, and 1 cloudy day in February. The rains are usually heavy. February as well as January, March, May, and June is considered the most uncomfortable time to visit Rio Grande.