Marion, Indiana, located in Grant County, experiences a humid continental climate, characterized by moderate to hot summers and cold winters. The average annual temperature is around 52°F. Summers bring temperatures ranging from the mid-70s to the mid-80s, and winters see average temperatures in the mid-20s to low 30s.

The city is situated near the Mississinewa River, which contributes to its hydrology constituents. The river not only provides a picturesque view but also offers recreational opportunities such as fishing, kayaking, and canoeing. Additionally, there are several nearby lakes and reservoirs, including Mississinewa Lake, Salamonie Lake, and Summit Lake, which attract visitors with activities like boating, swimming, and camping.

Outdoor enthusiasts can explore the beautiful scenery of Marion through its various parks and trails. Matter Park, a popular recreational spot, features walking trails, picnic areas, playgrounds, and a butterfly garden. The Cardinal Greenway, a 62-mile rail-trail, passes through Marion, providing opportunities for walking, jogging, and cycling. Other parks like Westwood Park and Kendall Park offer additional amenities like sports fields, disc golf, and skateboarding.

Overall, Marion, Indiana, presents a pleasant climate, abundant water resources, and diverse outdoor recreation opportunities for residents and visitors alike.