Whether you're visiting Oregon in the United States of America during the peak of August (28°C (82°F)) or the cooler months around December (7°C (45°F)), knowing what to pack starts with understanding the local climate. Our overview is based on data from Portland, the region's most prominent city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
In Oregon, during the months of May, June and September you can expect comfortable weather, with average temperatures ranging from 20°C (68°F) to 24°C (75°F).
The colder period typically falls in the months of January and December.
When it comes to rainfall, Oregon sees significant variations throughout the year. December tends to be the wettest, receiving 178 mm (7 in) of rain, while August is much drier with just 10 mm (0.4 in). The period of July and August is the driest, with precipitation levels below 13 mm (0.5 in).
Visitors hoping to maximize their time in the sun should consider planning their trip for July, when daylight hours are at their peak.
