March in Idaho Falls averages a daily high of 9.3°C with nights around -2.7°C. Expect roughly 9.5 wet days totalling 31.9mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Idaho Falls is June.
Based on IDAHO FALLS KIFI, ID US (5.5km), 1995–2024. 27 years of March data.