Garnett, Kansas experiences a humid subtropical climate, which is characterized by hot, humid summers and cold winters with occasional snowfall. The area is located within the Osage-Smoky Hill River Basin and is home to numerous lakes, streams, and wetlands. The hydrology constituents of the region include high levels of nitrogen and phosphorus, which can contribute to harmful algal blooms in bodies of water. Outdoor recreation opportunities in Garnett include fishing, boating, and hunting in the nearby lakes and wetlands. The city also boasts several parks, walking trails, and a public swimming pool for residents and visitors to enjoy.