March in Viacha averages a daily high of 15.4°C with nights around 3.3°C. Expect roughly 15.6 wet days totalling 84.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Viacha is April–November.
Based on EL ALTO INTERNATIONAL, BL (19.1km), 1995–2024. 18 years of March data.