October in Oma is the rainiest month of the year. In October, the weather in Oma is typically cold. Average daily high temperature in October is about 3 degrees above zero. On average, Oma has 25 rainy, 3 snowy, and 3 cloudy days in October. The rains are usually moderate. October as well as January, February, May, and August is considered the most uncomfortable time to visit Oma.