About Lamar, CO's Climate & Weather History

With a population of around 7,600, Lamar sits in Colorado, United States. The city operates in the Mountain Time Zone.

In 2025, Lamar recorded an average annual temperature of 57°F. The hottest temperatures reached 106°F in August; the coolest were -4°F in January. Total precipitation for the year was 14 inches, with the wettest month being May. Snowfall for the year totaled approximately 3 inches.