Portland, OR Climate


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Portland, OR has a mild climate with warm summers and cool winters. The average temperature in the summer is around 70°F while the average temperature in winter is generally around 40°F. Rainfall is abundant throughout the year, especially during the winter months when it averages about 37 inches per year. Portland also sees an average of 18 days of snow per year, mostly occurring between December and February.

Portland, Oregon gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Portland averages 3 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 144 sunny days per year in Portland. The US average is 205 sunny days.

Portland gets some kind of precipitation, on average, 156 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.


Weather Highlights

Summer High: the July high is around 81 degrees
Winter Low: the January low is 36
Rain: averages 43 inches of rain a year
Snow: averages 3 inches of snow a year


Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Portland is 7.5 (10=best), which means it is more comfortable than most places in Oregon.

9.4 Summer - 5.6 Winter
August, July and September are the most pleasant months in Portland, while December and January are the least comfortable months.

  ClimatePortland, OregonUnited States
  42.8 in.38.1 in.
  2.6 in.27.8 in.
  155.9 days106.2 days
  144 days205 days
  80.5°85.8°
  36.4°21.7°
  7.57
  34.3
  33 ft.2443 ft.
Climate
YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

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°. The most pleasant months of the year for Portland are September, July and August.
In Portland, there are 11.6 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.
December has the coldest nighttime temperatures for Portland with an average of 35.6°. This is warmer 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.
Humidity in Portland is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are August, July and September.
December is the wettest month in Portland with 6.8 inches of rain, and the driest month is July with 0.7 inches. The wettest season is Spring with 41% of yearly precipitation and 7% occurs in Autumn, which is the driest season. 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 a 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. December is the snowiest month in Portland with 0.9 inches of snow, and 3 months of the year have significant snowfall.
Reviews for Portland
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I lived in Portland for 19 years (I've also lived in Boise, ID, the Bay Area, Austin, TX and now Nampa, ID). It drives me nuts when people try to give a large city a  More

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One of the best cities in America. Food scene is the best in the world. Weather is preferable over places where you have the same weather year round. I enjoy the  More

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I moved from Houston to Portland about a year ago. I remember reading the reviews on here and it making me second guess moving before I did, so I wanted to come back and  More

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