Port Jefferson, Ohio is a small village located in Shelby County. The climate in Port Jefferson is classified as humid continental, with warm summers and cold winters. Average temperatures range from the high 80s°F in summer to the low 20s°F in winter. Precipitation is fairly evenly distributed throughout the year.

Hydrologically, Port Jefferson is situated near the Great Miami River, providing access to a variety of water-related activities. The river supports several species of fish, making it a popular spot for fishing enthusiasts. Additionally, the river offers opportunities for boating, kayaking, and canoeing.

Outdoor recreation opportunities in Port Jefferson are abundant. The village is surrounded by lush green landscapes, making it ideal for hiking and biking. There are also several parks and nature preserves in the area, such as the Lockington Dam Park and the Brukner Nature Center, offering beautiful trails for nature walks and birdwatching.

Overall, Port Jefferson offers a pleasant climate, access to the Great Miami River, and a range of outdoor activities, making it an attractive destination for nature lovers and outdoor enthusiasts.