Vernonia, Oregon is a small town located in Columbia County, nestled in the Pacific Northwest region of the United States. The town enjoys a temperate climate characterized by mild, wet winters and warm, dry summers. The yearly average temperature in Vernonia ranges from the low 40s°F (around 5°C) in winter to the mid-70s°F (around 24°C) in summer.

Hydrologically, Vernonia is situated in the Nehalem River Basin and is surrounded by lush forests and natural beauty. The area boasts numerous creeks and streams that contribute to the Nehalem River's flow. The river serves as a significant water source for the town and supports a diverse range of aquatic life.

Outdoor recreation opportunities abound in Vernonia, making it a haven for nature enthusiasts. The Vernonia Lake is a popular spot for fishing, boating, and picnicking. Hiking and biking trails, such as the Banks-Vernonia State Trail, offer scenic routes through the area's picturesque landscapes. The surrounding forests provide ample opportunities for camping, bird-watching, and wildlife spotting. With its mild climate and abundant natural resources, Vernonia offers a welcoming environment for those seeking to immerse themselves in the great outdoors.