weather in guymon, ok
Average Weather in Guymon Oklahoma, United States. In Guymon, the summers are hot and mostly clear; the winters are chilly, dry, and partly cloudy; and it is windy year round. Over the course of the year, the temperature typically varies from 23Â°F to 94Â°F and is rarely below 10Â°F or above 102Â°F.