March in Denver averages a daily high of 14.3°C with nights around -1.8°C. Expect roughly 5.5 wet days totalling 30.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Denver is September–October.
Based on DENVER WATER DEPARTMENT, CO US (2.3km), 1995–2024. 25 years of March data.