January in Graz averages a daily high of 3.9°C with nights around -2.8°C. Expect roughly 6.5 wet days totalling 22.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Graz is April–September.
Based on GRAZ, AU (1.9km), 1995–2024. 28 years of January data.