December in Salem averages a daily high of 8.4°C with nights around 1.8°C. Expect roughly 19.2 wet days totalling 183.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Salem is June–September.
Based on SALEM AIRPORT MCNARY FIELD, OR US (5km), 1995–2024. 30 years of December data.