September in Eugene averages a daily high of 25.2°C with nights around 9°C. Expect roughly 6.2 wet days totalling 37.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Eugene is June–September.
Based on EUGENE MAHLON SWEET FIELD, OR US (13.7km), 1995–2024. 30 years of September data.