Appleton, Wisconsin is located in the eastern part of the state and has a humid continental climate. Summers are warm and humid, with average temperatures in the mid to upper 70s, while winters are cold with average temperatures in the mid-20s. The Fox River runs through the city, and the water quality is monitored for hydrology constituents such as phosphorus and nitrogen. Outdoor recreation opportunities in Appleton include hiking and biking on the Fox River Trail, fishing in the Fox River or nearby Lake Winnebago, and exploring the many parks and nature preserves in the area, including High Cliff State Park and the Heckrodt Wetland Reserve.