Runnells, Iowa is a small town located in Polk County, in the central part of the state. The town experiences a humid continental climate, characterized by hot summers and cold winters. Average temperatures range from around 25°F (-4°C) in winter to approximately 85°F (29°C) in summer. Precipitation is fairly evenly distributed throughout the year, with an average annual rainfall of about 35 inches (89 cm) and snowfall of around 33 inches (84 cm).

The town of Runnells is situated near Fourmile Creek, which flows through the central part of the community. The creek serves as a vital hydrological feature and provides opportunities for various outdoor activities such as fishing and boating. Additionally, the area is home to several parks and nature reserves, including Jester Park, Big Creek State Park, and Saylorville Lake, offering residents and visitors opportunities for hiking, camping, and wildlife watching.

Overall, Runnells, Iowa offers a pleasant climate with distinct seasons, and its proximity to waterways and natural areas provides ample opportunities for outdoor recreation.