About Olathe, CO's Climate & Weather History

Olathe is a city of approximately 1,800 people in Colorado, United States. Located in the Mountain Time Zone at 38.6°N latitude.

In 2025, Olathe recorded an average annual temperature of 53°F. The hottest temperatures reached 102°F in July; the coolest were 4°F in January. Total precipitation for the year was 10 inches, with the wettest month being October. Snowfall for the year totaled approximately 6 inches.