Portland, Oregon weather in December
Temperature, rain and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: June – September
What is the weather like in Portland, Oregon in December?
In December, Portland, Oregon is cold: daytime highs average 8 °C, and nights cool down to about 2 °C. The sun is scarce, with only about 2 hours a day. It rains often – on about 19 days, adding up to 204 mm. Snow falls on about 2 days. All in all, December is not an ideal month for a holiday in Portland, Oregon.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 16 | 0 | 2 |
| Day | 11° | 8° | 8° |
| Night | 4° | 2° | 2° |
| Sun | 3 h | 2 h | 3 h |
| Rain days | 18 | 19 | 18 |
More details for December
- Daylight
- 8 h 44 min07:44 – 16:28
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 78 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 2 days1 cm or more of fresh snowAll months
- Time zone
- UTC−8America/Los_Angeles
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Warm jacket
- Rain jacket or umbrella
Portland, Oregon in December: quick answers
Is Portland, Oregon hot in December?
No. In December, Portland, Oregon is cold: daytime highs average 8 °C and nights drop to about 2 °C.
Does it rain much in Portland, Oregon in December?
It rains often – on about 19 days, adding up to 204 mm.
Portland, Oregon month by month
The whole year in Portland, OregonAll destinations: USAWhere to go in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences