March in Flagstaff averages a daily high of 11.1°C with nights around -4.5°C. Expect roughly 6.9 wet days totalling 47.3mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Flagstaff is May–June.
Based on FLAGSTAFF AIRPORT, AZ US (6.1km), 1995–2024. 30 years of March data.