January in Frankfurt am Main averages a daily high of 5°C with nights around 0.5°C. Expect roughly 13.6 wet days totalling 55.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Frankfurt am Main is May–September.
Based on FRANKFURT MAIN WESTEND, GM (1.7km), 1995–2024. 30 years of January data.