Riverside, Iowa is a charming town located in Washington County. It has a humid continental climate with hot summers and cold winters. The average high temperature in summer is around 85°F (29.4°C), while winter temperatures can drop to an average low of 15°F (-9.4°C). Precipitation is spread fairly evenly throughout the year, with an average of 36 inches (91.4 cm) of rainfall annually.

The town is situated near the Iowa River, which plays a significant role in the area's hydrology. This river provides opportunities for various outdoor activities like fishing, boating, and kayaking. Fishing enthusiasts can catch a variety of fish species, including catfish, bass, and walleye.

For outdoor recreation, Riverside offers several parks and trails for hiking, biking, and picnicking. The Col. F.W. Breckenridge Memorial Trail is a popular choice, offering scenic views and a peaceful atmosphere. Additionally, the Riverside Casino and Golf Resort provides golf enthusiasts with an 18-hole championship golf course.

Overall, Riverside, Iowa offers a favorable climate for outdoor activities and boasts a beautiful natural setting with the Iowa River and various parks, making it an excellent destination for nature lovers and outdoor enthusiasts.