Newhall, Iowa experiences a humid continental climate characterized by hot summers and cold winters. Average summer temperatures range from 70°F to 90°F, while winter temperatures can drop to 20°F. The area receives around 35 inches of rainfall annually, with snowfall occurring during the winter months.

Newhall is located near the Wapsipinicon River, which provides hydrology constituents to the region. The river offers opportunities for fishing, boating, and other water-based activities. Additionally, the area is dotted with small lakes and ponds that attract outdoor enthusiasts for fishing and birdwatching.

Outdoor recreation opportunities in Newhall include hiking, camping, and picnicking in nearby parks and nature reserves. The nearby Palisades-Kepler State Park offers hiking trails, scenic overlooks, and camping facilities. This charming town provides ample opportunities for residents and visitors to enjoy the natural beauty and outdoor activities in the area.