January in Billings averages a daily high of 4.2°C with nights around -9.1°C. Expect roughly 4.9 wet days totalling 11.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Billings is June.
Based on BILLINGS WATER TREATMENT PLANT, MT US (2km), 1995–2024. 30 years of January data.