New Liberty, Iowa experiences a humid continental climate, characterized by four distinct seasons. Summers are warm and humid, with temperatures ranging from the 70s to the 90s Fahrenheit. Winters are cold, with temperatures often dipping below freezing and occasional snowfall. The area receives around 35 inches of precipitation annually, evenly distributed throughout the year.

Located near the Wapsipinicon River, hydrology constituents play a significant role in New Liberty. The river provides opportunities for fishing enthusiasts, with popular catches including catfish, walleye, and smallmouth bass. Additionally, the river serves as a serene backdrop for boating and kayaking activities.

Outdoor recreation in New Liberty is abundant, offering opportunities for hiking, camping, and birdwatching at nearby parks such as Wapsipinicon State Park and Wildcat Den State Park. These parks boast picturesque landscapes, diverse wildlife, and scenic trails, making them ideal destinations for nature enthusiasts.