Washington, Iowa is a charming city located in the southeastern part of the state. The climate in Washington is characterized by warm summers and cold winters. Average temperatures range from the mid-80s°F (29°C) during summer to the mid-20s°F (-4°C) in winter. Precipitation is evenly distributed throughout the year, with an annual average of around 35 inches (89 cm) of rainfall.

Hydrologically, Washington is bisected by the English River, which adds scenic beauty to the area. This river provides opportunities for fishing, canoeing, and kayaking, attracting outdoor enthusiasts. The Lake Darling State Park, located just 10 miles north of the city, offers a plethora of recreational activities, including boating, swimming, camping, and hiking. The park's lake is also well-known for its excellent fishing opportunities, particularly for largemouth bass and crappie.

In addition to the river and state park, Washington boasts several parks and trails for walking, biking, and picnicking. Sunset Park, for instance, provides stunning views of the surrounding countryside and features a disc golf course. The city also holds various community events throughout the year that celebrate the outdoors, such as the Washington County Fair and the Farmers Market. Overall, Washington, Iowa offers a diverse range of outdoor recreation opportunities for residents and visitors to enjoy amidst its pleasant climate and beautiful hydrology.