Denison is a city located in Grayson County, Texas, with a humid subtropical climate. Temperatures range from highs in the 90s during the summer months to lows in the 30s during the winter. The city is situated near Lake Texoma, a reservoir with a variety of hydrology constituents, including catfish, bass, and crappie. Denison also has several parks and outdoor recreation areas, such as Munson Park and Waterloo Lake Regional Park, which offer hiking trails, picnic areas, and fishing opportunities. The area is also popular for boating, water skiing, and camping.