December in Provo averages a daily high of 5.4°C with nights around -3.9°C. Expect roughly 9.6 wet days totalling 48.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Provo is September–October.
Based on PROVO BYU, UT US (1.5km), 1995–2024. 30 years of December data.