University City is a vibrant suburb located in St. Louis County, Missouri. It experiences a humid subtropical climate, characterized by hot summers and mild winters. Summers are typically hot and humid, with average temperatures ranging from the mid-80s to low-90s Fahrenheit. Winters are relatively mild, with temperatures in the mid-30s to mid-40s Fahrenheit.

The hydrology constituents in University City mainly revolve around the River Des Peres, a significant waterway in the region. While University City itself does not have any major lakes or rivers, it is part of the Greater St. Louis area, which offers various water-based recreational activities like boating, fishing, and kayaking.

Outdoor recreation opportunities in University City and its surroundings are plentiful. The city boasts numerous parks and green spaces, including Heman Park, which offers facilities for sports, picnicking, and walking trails. Just a short drive away, Forest Park, the heart of St. Louis, provides a wealth of outdoor activities like biking, jogging, golfing, and even paddle-boating on its iconic Grand Basin.

In summary, University City, Missouri, features a humid subtropical climate, with hot summers and mild winters. While lacking major water bodies, it benefits from its proximity to the River Des Peres and provides ample opportunities for outdoor recreation through its parks and nearby attractions like Forest Park.