Portland Weather in December
December in Portland typically sees daytime highs of 4°C (39°F) and nighttime lows of -5°C (23°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the winter season.
Rainfall in Portland in December
Climate statistics over the past 30 years suggest around 14 days of snow/rain, with 139 mm (5.5 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Portland in December
December in Portland brings typical temperatures with highs around 4°C (39°F) and lows of -5°C (23°F). Experience the winter season in December. Staying warm is the main priority this month, especially during mornings and evenings. At -5°C (23°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating. It is a very cold month, so be prepared and make sure to dress up warm. It's always better to be prepared than to find oneself shivering in the cold.
Sunshine in Portland in December
The area enjoys a moderate level of sunlight, with around 140 hours. It's a good balance between sunny and cloudy days.
Average water temperature in December
With water temperatures around 7°C (45°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Portland. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.
Portland Temperature in December
Min Temperature
-5°C (23°F)
Max Temperature
4°C (39°F)
Water Temperature
7°C (45°F)
Chance of Rain
48%
Precipitation
139 mm (5.5 in)
Rainy days
14 days
Humidity
70%
Sunshine
140 hours
Percentage Sunshine
51%
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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What to Wear in Portland in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. Expect water temperatures of around 7°C (45°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Portland in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Portland climate overview or explore weather in the United States of America.
