January weather forecast in Olathe

January in Olathe is the coldest month of the year. In January, the weather in Olathe is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Olathe has 15 partly cloudy, 12 sunny, 3 rainy, and 1 cloudy day in January. The rains are usually light. January as well as February, March, and December is considered the most uncomfortable time to visit Olathe.