Walsh, Illinois is a small village located in Randolph County in the southern part of the state. The climate in Walsh is classified as humid subtropical, characterized by hot and humid summers and mild to cool winters. Average temperatures range from around 40°F (4°C) in winter to 90°F (32°C) in summer. Precipitation is evenly distributed throughout the year, with an annual average of around 40 inches.

Hydrologically, Walsh is situated in the Mississippi River Watershed. The village is surrounded by fertile agricultural land, with some creeks and small streams running through the area. These water bodies serve as important hydrological constituents, contributing to the overall water quality and ecological balance in the region.

Despite being a small community, Walsh offers several outdoor recreation opportunities. The surrounding landscape is ideal for activities such as hiking, camping, and wildlife watching. The region boasts picturesque natural areas, including forests, prairies, and wetlands, providing a diverse range of habitats for flora and fauna. Additionally, nearby lakes and rivers offer opportunities for boating, fishing, and swimming. Overall, Walsh, Illinois provides a peaceful and scenic environment for residents and visitors to enjoy various outdoor activities throughout the year.