Nunn, Colorado is a small town located in Weld County. It experiences a semi-arid climate with hot summers and cold winters. The average temperature ranges from 20°F to 90°F, and the area receives around 15 inches of precipitation annually.

Nunn sits in the South Platte River Basin and has access to several water bodies, including the nearby Pawnee National Grassland and Crow Creek. These water sources contribute to the hydrology constituents of the area, supporting agricultural activities and wildlife habitats.

Outdoor enthusiasts can enjoy various recreational opportunities in Nunn. The Pawnee National Grassland offers hiking, camping, and birdwatching, while Crow Creek provides fishing and boating options. Additionally, the area is known for its wide-open spaces, making it a great place for horseback riding and off-road adventures.