In June, the weather in Guanajuato is typically warm. Average daily high temperature in June is about 24 degrees above zero. On average, Guanajuato has 20 rainy, 5 partly cloudy, 4 sunny, and 1 cloudy day in June. The rains are usually heavy. June as well as July, August, and September is considered the most uncomfortable time to visit Guanajuato.