Weather in Portland in December 2024
- December is usually the wettest month of the year in Portland;
Average weather
Average temperature in Portland in December
The temperature in December is +50°F on average, with a range between a maximum of +64°F during the day and a minimum of +36°F at night.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +52°F to +52°F.
Is Portland warm or cold in December?
Portland is typically chill in December.
Maximum temperatures go down compared to the previous month from +52°F to +46°F. The minimum temperature also goes down from +41°F to +37°F.
Pack a jumper and a jacket as there will be cooler temperatures.
December is one of the coolest months in Portland, here is the comparison with other months:
Climate in Portland in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +52°F | +46°F | +46°F | ||||
| Min. temperature | ||||||
| +10°F | 0°F | +9°F | ||||
| Max. temperature | ||||||
| +70°F | +64°F | +61°F | ||||
| Rainfall | ||||||
| 180 mm | 187 mm | 157 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 84% | 85% | 84% | ||||
| Air pressure | ||||||
| 1017 HPa | 1017 HPa | 1018 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 2 | ||||
| Cloudy days | ||||||
| 7 | 8 | 8 | ||||
| Rainy days | ||||||
| 20 | 18 | 18 | ||||
| Snowy days | ||||||
| 1 | 3 | 3 | ||||
December typically has worse weather conditions compared to November. It’s getting colder in December. From +52°F in the day, the average maximum temperature lowers to +46°F. Prepare for more rain. Average rainfall goes from 180 mm to 187 mm. Humidity rises from 84% to 85%. The average wind speed doesn’t change much during December, staying around 2 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
But maybe it is worth considering traveling in January as the weather gets better.
Wind
The average wind speed is 4 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Portland is gradually decreasing during December, going from 4 m/s to 1 m/s over the course of the month.
Rain
Snow
December is one of the snowiest months in Portland.
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Portland?
Climate Change Over the Years
The climate in Portland in December has not changed that much over the last 43 years.
The average temperature was the lowest in 2011 (+61°F) and the highest in 2015 (+67°F). The driest year was 1985 with only 736 mm of rainfall, and the wettest year was 2021 with 4296 mm.
FAQ
Is December a good time to visit Portland?
Can you sunbathe in Portland in December?
Is Portland rainy in December?
Is it sunny in Portland in December?
Other cities in USA
Monthly weather in Portland
Source of the data
For this page, we’ve looked at the typical weather in Portland, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.