Portland, Oregon’s weather in January 2025 is expected to be cold and wet, with average temperatures ranging from 35 to 45 degrees Fahrenheit. The city is likely to experience rain or snow throughout the month, with occasional breaks of sunshine. January is typically the coldest and wettest month of the year in Portland, so visitors should be prepared for inclement weather.
The cold and wet weather in Portland during January can be attributed to the city’s location in the Pacific Northwest. The region is known for its mild, wet winters and warm, dry summers. However, during the winter months, the jet stream often dips southward, bringing cold, moist air from the Gulf of Alaska to the Pacific Northwest. This air can produce rain, snow, and freezing temperatures.
