January in Athens averages a daily high of 12.6°C with nights around 1.1°C. Expect roughly 10.5 wet days totalling 118.6mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Athens is March–May.
Based on ATHENS BEN EPPS AIRPORT, GA US (4.9km), 1995–2024. 30 years of January data.