Compared to Seattle and Vancouver, Portland is both warmer and drier all year round. On average, the “Rose City” has 144 sunny days and an annual average temperature of 71 degrees Fahrenheit (22 degrees Celsius), making it an ideal place to foster a rose garden.
For this reason, the Portland area gets 280 growing days on average and sits in one of the more lush parts of the country. Despite this reputation for rain, Portland is not one of the top 10 U.S. cities with the highest annual rainfall.
Compared to the East Coast or Midwest, where it can rain 2 or 3 inches in an hour or two, it can take days and often weeks to accumulate that amount in Portland. The tail end of spring includes the sunniest time of year in Portland, which stretches from May through October.
In the spring, Portland bursts into bloom as rhododendrons, azaleas, cherry trees, and, of course, roses come into full flower in parks, gardens, and yards all over town. Temperatures are starting to get warmer, but you will still need clothes to keep you warm like a sweater or light jacket.
No matter what time of year you arrive in Portland, it's always best to bring clothing you can layer. Most visitors arrive in Portland during the summer months, which is a terrific time of year.
There is little rainfall (only about 4.5 inches during the entire summer), and days are warm and dry. August is the hottest month, but if you're from the broiling mid-Atlantic, South, or Southwest, you'll find the weather refreshingly cool.
What to pack: In the summer, you can likely forego the Rainier since the showers are light, sporadic, and usually a welcome sight. All months of the year can be considered suitable for a nice hike through the parks and trails in and around Portland.
And even in the depths of winter, you'll almost certainly be able to hike and explore the gorgeous scenery of the Pacific Northwest. In fact, the average snowfall in Portland is just 4.3 inches, and that little of snow generally falls over the course of just a day or two.
The rainiest parts of the Portland metropolitan area are Damascus and Happy Valley. Portland, Oregon gets 43 inches of rain, on average, per year.
Climate Averages Portland, OregonUnited States Rainfall 42.8 in.38.1 in. Weather is how the atmosphere is behaving and its effects upon life and human activities.
Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure. Climate can mean the average weather for a particular region and time period taken over 30 years.
August is the hottest month for Portland with an average high temperature of 81.1°, which ranks it as cooler than most places in Oregon. In Portland, there are 4 comfortable months with high temperatures in the range of 70-85°.
This is warmer than most places in Oregon. In Portland, there are 11.6 days annually when the high temperature is over 90°, which is cooler than most places in Oregon. In Portland, there are 29.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oregon. In Portland, there are 0.0 days annually when the nighttime low temperature falls below zero, which is about average compared to other places in Oregon. December is the wettest month in Portland with 6.8 inches of rain, and the driest month is July with 0.7 inches. The annual rainfall of 42.8 inches in Portland means that it is about average compared to other places in Oregon. November is the rainiest month in Portland with 19.3 days of rain, and August is the driest month with only 3.7 rainy days.
There are 155.9 rainy days annually in Portland, which is rainier than most places in Oregon. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only an 11% chance of a rainy day. An annual snowfall of 2.6 inches in Portland means that it is less snowy than most places in Oregon.
Annual Rainfall Annual Snowfall Precipitation Days Sunny Days July High Temp January Low Temp Reset Map View More Data > MAPS OF PORTLAND, OREGON Check out the latest Maps in a variety of categories including cost of living, population, and commute time.