Larchwood, Iowa is a small town located in Lyon County, in the northwest corner of the state. It experiences a humid continental climate, characterized by hot summers and cold winters. The average high temperatures in summer reach around 85°F (29°C), while winter lows can drop to 10°F (-12°C). Precipitation is fairly evenly distributed throughout the year, with an annual average of 30 inches (76 cm), including snowfall during the winter months.

Larchwood is situated near the West Branch of the Rock River, providing opportunities for various hydrology constituents. Fishing enthusiasts can enjoy angling for species such as catfish, bass, and walleye. The river also provides a scenic backdrop for canoeing and kayaking adventures.

For outdoor recreation, Larchwood offers multiple options. Gitchie Manitou State Preserve, located just south of town, offers hiking trails through a beautiful natural area with unique geological features. For golf enthusiasts, the Grand Falls Casino and Golf Resort boasts an 18-hole championship course. Additionally, Larchwood is surrounded by picturesque countryside, making it an ideal location for biking, birdwatching, and exploring nature.