September in South Hill averages a daily high of 20.6°C with nights around 9°C. Expect roughly 8.6 wet days totalling 43.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit South Hill is July–September.
Based on MCMILLIN RESERVOIR, WA US (1.2km), 1995–2024. 17 years of September data.