Rouseville, Pennsylvania is a small borough located in Venango County, in the northwestern part of the state. The climate in Rouseville is classified as humid continental, characterized by four distinct seasons. Summers are generally warm and humid, with average temperatures in the 70s°F (20s°C), while winters can be cold, with temperatures often dropping below freezing and occasional snowfall.

Rouseville is situated in close proximity to Oil Creek, a tributary of the Allegheny River. The hydrology constituents of the area are primarily influenced by the creek and its watershed. Oil Creek is known for its historical significance in the oil industry, and remnants of the early oil boom can still be seen in the surrounding landscapes.

Outdoor recreation opportunities in Rouseville are abundant. The area offers scenic hiking and biking trails, including the Oil Creek State Park Trail, which follows the path of the creek and provides opportunities for fishing and wildlife observation. Canoeing and kayaking are popular activities on Oil Creek, allowing visitors to explore the waterway's serene beauty. Additionally, nearby Oil Creek State Park offers camping facilities and opportunities for picnicking and birdwatching, making Rouseville an ideal destination for nature enthusiasts.