December in Pueblo averages a daily high of 9.4°C with nights around -7.4°C. Expect roughly 3.9 wet days totalling 6.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Pueblo is April–May.
Based on PUEBLO RESERVOIR, CO US (9.5km), 1995–2024. 29 years of December data.