Situated in St. Louis County, Missouri, Saint Ann is a suburban community that offers a comfortable living environment with easy access to outdoor recreational opportunities. The climate in Saint Ann is characterized by hot, humid summers and cold winters. Summers are typically warm, with temperatures often reaching the mid-80s to low 90s Fahrenheit. Winter temperatures drop to the 20s and 30s, occasionally dipping below freezing. Rainfall is evenly distributed throughout the year, with a slightly higher precipitation rate during the spring and summer months.

When it comes to hydrology constituents, Saint Ann benefits from its proximity to the Missouri River, which provides a reliable water source and the potential for various water-based activities. Additionally, the community is home to several small lakes and ponds that offer opportunities for fishing, boating, and leisurely walks along their shores.

For outdoor enthusiasts, Saint Ann boasts several local parks and green spaces. Tiemeyer Park is a popular destination, offering amenities such as sports fields, playgrounds, and picnic areas. Saint Ann Park provides walking trails, a swimming pool, and opportunities for outdoor sports. These recreational areas ensure that residents and visitors can enjoy the great outdoors right in their own backyard.