Rainier, Oregon is a small town located in Columbia County, in the Northwestern part of the state. The climate in Rainier is characterized by cool and wet winters, with average temperatures ranging from 35°F to 46°F (2°C to 8°C), and mild and dry summers, with average temperatures ranging from 53°F to 75°F (12°C to 24°C). The town receives approximately 75 inches (190 cm) of rainfall annually, contributing to the lush green landscapes.

Rainier is situated on the banks of the Columbia River, providing ample hydrological opportunities. The river is an important water source, supporting various aquatic species and offering opportunities for fishing, boating, and kayaking. The town is also surrounded by several creeks and streams that add to the overall beauty of the area.

Outdoor recreation enthusiasts can enjoy a variety of activities in Rainier. The town is nestled amidst stunning natural landscapes, including nearby forests, parks, and mountains. These areas provide opportunities for hiking, camping, bird-watching, and wildlife spotting. Additionally, the nearby Mount St. Helens National Volcanic Monument offers visitors a chance to explore the remnants of the famous eruption that occurred in 1980. With its diverse climate, abundant hydrology, and numerous outdoor recreational opportunities, Rainier, Oregon is an ideal destination for nature lovers and adventure seekers.