In May, the weather in Farmington is typically warm. Average daily high temperature in May is about 21 degrees above zero. On average, Farmington has 21 sunny, 7 partly cloudy, 2 rainy, and 1 cloudy day in May. The rains are usually light. May as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Farmington.