Nashua, Iowa is a small city located in Chickasaw County. It experiences a humid continental climate, characterized by hot summers and cold winters. Average high temperatures in the summer range from 80-85°F (27-29°C), while average lows in the winter dip to around 10-15°F (-9 to -12°C). Precipitation is fairly evenly distributed throughout the year, with an annual average of 35-40 inches (89-102 cm).

Hydrologically, the city is situated near the Cedar River, which provides opportunities for water activities like fishing and boating. The river supports a diverse range of fish species, including catfish, bass, and walleye, making it a popular spot for anglers. Additionally, Nashua is close to the Little Turkey River, which is known for its scenic beauty and canoeing opportunities.

Outdoor recreation enthusiasts can enjoy several activities in and around Nashua. The city boasts several parks and trails, including the Cedar River Parkway Trail, which offers opportunities for walking, biking, and birdwatching. There are also nearby golf courses, camping grounds, and hunting areas for those who enjoy these activities. Overall, Nashua provides a variety of outdoor recreation opportunities for visitors and residents to enjoy.