January in South Hill averages a daily high of 7.8°C with nights around 1.1°C. Expect roughly 20.9 wet days totalling 160.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit South Hill is July–September.
Based on MCMILLIN RESERVOIR, WA US (1.2km), 1995–2024. 18 years of January data.