August in Billings averages a daily high of 31.1°C with nights around 13°C. Expect roughly 5.6 wet days totalling 24.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Billings is June.
Based on BILLINGS WATER TREATMENT PLANT, MT US (2km), 1995–2024. 29 years of August data.