December in Alvarado is the cloudiest month of the year. In December, the weather in Alvarado is typically warm. Average daily high temperature in December is about 12 degrees above zero. On average, Alvarado has 14 partly cloudy, 11 sunny, 4 rainy, and 2 cloudy days in December. The rains are usually moderate. December as well as January and August is considered the most uncomfortable time to visit Alvarado.