The best time to go to Tiller, Oregon is during the late spring, summer, and early autumn months, specifically from May to October.
These months offer the most agreeable weather conditions for outdoor activities, with warm, dry days superb for exploring the Umpqua National Forest or enjoying the region's rivers and lakes. You'll find temperatures pleasant for hiking, fishing, and scenic drives, avoiding the colder, wetter periods of winter.
For those planning to spend time enjoying the natural beauty of the area, like visiting nearby waterfalls or exploring the Rogue-Umpqua Scenic Byway, the summer months of July and August are particularly good. The longer daylight hours provide ample opportunity for sightseeing and relaxation.
If you prefer slightly milder temperatures and fewer crowds, late spring (May-June) or early autumn (September-October) are ideal.