April in Billings averages a daily high of 16°C with nights around 1°C. Expect roughly 8.7 wet days totalling 45.9mm. 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 April data.