Portland Weather in December

December in Portland brings pleasant temperatures around 19°C (66°F) during the day, dropping to 13°C (55°F) at night, with some rainfall expected.

Rainfall in Portland in December

This month experiences about 8 days of rain according to historical data, averaging 54 mm (2.1 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Portland in December

December in Portland brings typical temperatures with highs around 19°C (66°F) and lows of 13°C (55°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 13°C (55°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Should you favor a climate that's both dry and comfortably warm, January, February and March typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.