January in Bethesda averages a daily high of 7°C with nights around -3.1°C. Expect roughly 9.7 wet days totalling 79.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Bethesda is April–May.
Based on DALECARLIA RESERVOIR, MD US (4.8km), 1995–2024. 29 years of January data.