• March 1 – A huge snowfall blocked many rural roads. The Red Cross began a fund-raising drive.
• March 3 – One man was killed and two were injured in an explosion during construction of the Northern Pacific Railroad tunnel east of Bozeman.
• March 4 – Doolittle Raider David Thatcher was interviewed on a radio program on the Blue Radio network.
• March 6 – Two civilians flying an Aeronca trainer were injured after they struck a power line and crashed near Apgar. Minus 16 degrees recorded in Glasgow.
• March 14 – A five-year-old Billings boy lost a leg after being run over by a train.
• March 19 – A 7th Ferrying Group pilot was killed in the crash of his light bomber at Stockett.
• March 24 – A gasoline explosion at a Baker garage destroyed eight cars and caused $40,000 damage.
• March 30 – The Montana Hotel in Helena was damaged by fire. All 19 guests were evacuated safely.
• March 31 – The old grandstand at Anaconda was destroyed by fire.