Portland-Vancouver-Hillsboro Metro Area, OR Climate

The Portland-Vancouver-Hillsboro, OR Metro Area has a mild, temperate climate with warm summers and cool to cold winters. The average temperature in the summer months is around 75°F, though temperatures can reach the upper 80s and even low 90s on hot days. In the winter months, temperatures usually range between 35°F and 45°F, although snowfall is rare. However, when snow does fall it tends to stay on the ground longer than in other regions due to its relatively low elevation. Rainfall is abundant throughout all seasons in this region of Oregon, averaging around 40 inches annually.

Portland-Vancouver-Hillsboro Metro Area, Oregon gets 48 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Portland-Vancouver-Hillsboro Metro Area averages 6 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 137 sunny days per year in Portland-Vancouver-Hillsboro Metro Area. The US average is 205 sunny days.

Portland-Vancouver-Hillsboro Metro Area gets some kind of precipitation, on average, 160 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 48 inches of rain a year
Snow: averages 6 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the Portland-Vancouver-Hillsboro metro area is 7.3 (10=best), which means it is more comfortable than most places in Oregon.

9.3 Summer - 5.3 Winter

July, August and September are the most pleasant months in the Portland-Vancouver-Hillsboro metro area, while December and January are the least comfortable months.

Climate	Portland-Vancouver-Hillsboro, Oregon	United States
	48.2 in.	38.1 in.
	5.7 in.	27.8 in.
	160.0 days	106.2 days
	137 days	205 days
	79.9°	85.8°
	34.7°	21.7°
	7.3	7
	2.9	4.3
	1267 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 the Portland-Vancouver-Hillsboro metro area with an average high temperature of 80.7°, which ranks it as cooler than most places in Oregon. In the Portland-Vancouver-Hillsboro metro area, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the Portland-Vancouver-Hillsboro metro area are July, August and September.

In the Portland-Vancouver-Hillsboro metro area, there are 11.7 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 Portland-Vancouver-Hillsboro metro area with an average of 33.9°. This is warmer than most places in Oregon.

In the Portland-Vancouver-Hillsboro metro area, there are 45.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oregon.

In the Portland-Vancouver-Hillsboro metro area, 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 Portland-Vancouver-Hillsboro metro area 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 the Portland-Vancouver-Hillsboro metro area with 7.6 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 48.2 inches in the Portland-Vancouver-Hillsboro metro area means that it is wetter than most places in Oregon.

November is the rainiest month in the Portland-Vancouver-Hillsboro metro area with 19.8 days of rain, and August is the driest month with only 3.8 rainy days. There are 160.0 rainy days annually in the Portland-Vancouver-Hillsboro metro area, 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 5.7 inches in the Portland-Vancouver-Hillsboro metro area means that it is snowier than most places in Oregon. December is the snowiest month in the Portland-Vancouver-Hillsboro metro area with 1.6 inches of snow, and 5 months of the year have significant snowfall.