January in Oklahoma City is the snowiest and the coldest month of the year. In January, the weather in Oklahoma City is typically warm. Average daily high temperature in January is about 10 degrees above zero. On average, Oklahoma City has 17 sunny, 7 partly cloudy, 3 rainy, 3 cloudy, and 1 snowy day in January. The rains are usually moderate. January as well as February, May, June, and July is considered the most uncomfortable time to visit Oklahoma City.