December in Lehi averages a daily high of 4.7°C with nights around -5.7°C. Expect roughly 7.9 wet days totalling 26.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Lehi is May–June.
Based on UTAH LAKE LEHI, UT US (5.3km), 1995–2024. 17 years of December data.