The climate is typical of the Great Plains with hot summers and cold winters. The town is situated in the Arkansas River basin, and the river serves as a major hydrological feature. The water quality of the river is monitored for various constituents including nitrates and phosphates. Outdoor recreation opportunities in the area include camping and hiking at the nearby Cimarron National Grassland, which offers scenic views of the prairie ecosystem. Fishing and boating are also popular activities on the Arkansas River. Overall, Cimarron provides a peaceful and scenic getaway for nature enthusiasts.
Cimarron receives approximately 543mm of rain per year, with humidity levels near 78% and air temperatures averaging around 13°C. Cimarron has a plant hardyness factor of 6, meaning plants and agriculture in this region thrive during a short period during spring and early summer. Most plants will die off during the colder winter months.