December in Sparks averages a daily high of 8.4°C with nights around -4.4°C. Expect roughly 5.7 wet days totalling 30.5mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Sparks is April–May.
Based on SPARKS, NV US (2.9km), 1995–2024. 24 years of December data.