Knierim, Iowa is a small rural community located in Calhoun County. The region experiences a humid continental climate with four distinct seasons. Summers are warm and humid, with average temperatures ranging from 70°F to 90°F (21°C to 32°C). Winters are cold, with temperatures dropping between 10°F to 30°F (-12°C to -1°C), and snowfall is common.

The hydrology of Knierim is primarily influenced by the nearby Raccoon River. The river serves as a vital water source for the region and offers opportunities for outdoor activities such as fishing, boating, and canoeing. Anglers can find various species of fish, including catfish, bass, and walleye, in the river's waters.

In addition to the river, Knierim is surrounded by picturesque natural landscapes, making it an ideal place for outdoor recreation. The area boasts numerous parks and trails for hiking, biking, and camping. Outdoor enthusiasts can explore the beautiful countryside, enjoy birdwatching, or simply take in the serene beauty of the Iowa landscape.

Overall, Knierim offers a pleasant climate, access to the Raccoon River, and various outdoor recreation opportunities, making it an attractive destination for nature lovers and those seeking a tranquil rural experience.