Darlington, Wisconsin has a humid continental climate with warm summers and cold winters. The city is located near the Pecatonica River, which is a tributary to the Mississippi River. Hydrology constituents in the area include agricultural runoff, sediment, and nutrients. Outdoor recreation opportunities in Darlington include hiking and biking on the Pecatonica State Trail, swimming and fishing at Yellowstone Lake State Park, and hunting and trapping in the surrounding forests. The area is also known for its scenic drives, with rolling hills and picturesque farms dotting the landscape.