December in Tigard averages a daily high of 7.7°C with nights around 2.9°C. Expect roughly 19.1 wet days totalling 198.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Tigard is July–September.
Based on PORTLAND KGW TV, OR US (11.6km), 1995–2024. 29 years of December data.