Zip 97231 (Portland, OR) Climate

Portland, OR 97231 has a mild climate year round, with warm summers and cool to cold winters. The average summer temperature is around 68°F (20°C) during the day and 55°F (13°C) at night. Winters are drier than in other parts of the country, with an average winter temperature around 44°F (7°C) during the day and 34°F (1°C) at night. Rainfall is fairly consistent throughout the year, but there is less precipitation in the summer months. Snowfall is rare though when it does happen it usually occurs from December to February. Overall, Portland's climate is very pleasant and mild year round.

Portland (zip 97231), Oregon gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Portland (zip 97231) averages 2 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 142 sunny days per year in Portland (zip 97231). The US average is 205 sunny days.

Portland (zip 97231) gets some kind of precipitation, on average, 158 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 80 degrees
Winter Low: the January low is 35
Rain: averages 41 inches of rain a year
Snow: averages 2 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 97231 zip code is 7.4 (10=best), which means it is more comfortable than most places in Oregon.

9.3 Summer - 5.5 Winter

July, August and September are the most pleasant months in the 97231 zip code, while December and January are the least comfortable months.

Climate	Portland, Oregon	United States
	Unlock	38.1 in.
	1.7 in.	Unlock
	Unlock	106.2 days
	142 days	Unlock
	79.5°	85.8°
	Unlock	21.7°
	7.4	Unlock
	Unlock	4.3
	376 ft.	Unlock

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 the 97231 zip code with an average high temperature of 80.7°, which ranks it as cooler than most places in Oregon. In the 97231 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 97231 zip code are July, August and September.

In the 97231 zip code, there are 9.7 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.

December has the coldest nighttime temperatures for the 97231 zip code with an average of 34.4°. This is warmer than most places in Oregon.

In the 97231 zip code, there are 41.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oregon.

In the 97231 zip code, 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 the 97231 zip code 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.

November is the wettest month in the 97231 zip code with 6.5 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 40.5 inches in the 97231 zip code means that it is about average compared to other places in Oregon.

November is the rainiest month in the 97231 zip code with 19.8 days of rain, and August is the driest month with only 3.7 rainy days. There are 157.7 rainy days annually in the 97231 zip code, 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 1.7 inches in the 97231 zip code means that it is less snowy than most places in Oregon. February is the snowiest month in the 97231 zip code with 0.6 inches of snow, and 3 months of the year have significant snowfall.

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