The best time to go to Happy Valley, Oregon, is during the summer months, from June to September, for pleasant weather and outdoor activities, or in the fall, from late September to October, for scenic beauty.During the summer, Happy Valley experiences warm, dry weather, with average temperatures in the 70s Fahrenheit. This period is ideal for enjoying the local parks, exploring nearby hiking trails, and attending community events. Families will find this time particularly appealing for outdoor recreation and day trips to attractions like Mount Hood.For those who appreciate natural beauty and cooler temperatures, late September through October offers stunning autumn foliage. The surrounding areas, including the Clackamas River basin, transform with vibrant fall colors, making it a great time for scenic drives and photography.