Killeen, Texas is a city located in Bell County and is part of the Killeen-Temple-Fort Hood Metropolitan Statistical Area. The city experiences a humid subtropical climate with hot summers and mild winters. Summers are typically hot and humid, with temperatures often reaching the upper 90s°F (around 37°C) in July and August. Winters are relatively mild, with average temperatures in the 50s°F (around 10°C) from December to February.

Hydrologically, Killeen is primarily characterized by the Lampasas River, which flows through the city. The river provides opportunities for outdoor activities such as fishing and boating, with several parks and recreational areas along its banks.

Killeen offers various outdoor recreation opportunities. The nearby Belton Lake and Stillhouse Hollow Lake are popular spots for boating, fishing, and swimming. Nature enthusiasts can explore the Dana Peak Park, which offers hiking and biking trails, as well as camping facilities. The Miller Springs Nature Center is another great option for hiking and bird-watching. Additionally, Killeen has numerous parks and green spaces, providing opportunities for picnicking, sports, and family outings.

Overall, Killeen, Texas offers a diverse range of outdoor recreational activities, making it an appealing destination for nature lovers and outdoor enthusiasts.