Weather in Portland in January 2025
- January is usually the coldest month of the year in Portland;
Average weather
Average temperature in Portland in January
The temperature in January is +48°F on average, with a range between a maximum of +54°F during the day and a minimum of +23°F at night.
The average maximum temperature goes down 18% by the end of the month, compared with the beginning of the month, from +48°F to +43°F.
Is Portland warm or cold in January?
Portland is typically chill in January.
Maximum temperatures go up compared to the previous month from +46°F to +46°F. The minimum temperature also goes up from +37°F to +37°F.
Pack a jumper and a jacket as there will be cooler temperatures.
January is the coldest month in Portland, here is the comparison with other months:
Climate in Portland in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +46°F | +46°F | +50°F | ||||
| Min. temperature | ||||||
| 0°F | +9°F | 0°F | ||||
| Max. temperature | ||||||
| +64°F | +61°F | +68°F | ||||
| Rainfall | ||||||
| 187 mm | 157 mm | 132 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 85% | 84% | 81% | ||||
| Air pressure | ||||||
| 1017 HPa | 1018 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 3 | ||||
| Cloudy days | ||||||
| 8 | 8 | 6 | ||||
| Rainy days | ||||||
| 18 | 18 | 16 | ||||
| Snowy days | ||||||
| 3 | 3 | 3 | ||||
January often has better weather than December. The temperature levels stay the same in the area of +46°F for average maximum temperature during the day. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 187 mm to 157 mm. It feels drier, as humidity decreases from 85% to 84%. The average wind speed doesn’t change much during January, staying around 2 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
February brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 8 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 increasing during January, going from 1 m/s to 1 m/s over the course of the month.
Rain
Snow
January is one of the snowiest months in Portland.
Here’s how January is compared with other months in the amount of snow, total mm:
How was the weather last January in Portland?
Climate Change Over the Years
The climate in Portland in January 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 January a good time to visit Portland?
Can you sunbathe in Portland in January?
Is Portland rainy in January?
Is it sunny in Portland in January?
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.