Marion County, OR Climate

Marion County, Oregon has a mild climate with hot summers and cool winters. The average summer temperature in Marion County is 75°F (24°C) while the average winter temperature is 40°F (4°C). Precipitation in the area varies widely, with a range of 19-40 inches (483-1016 mm) per year. Snowfall is usually minimal, but some areas can receive up to 37 inches (94 cm) annually. The county also experiences mild winds throughout the year and is known for its beautiful landscapes and lush forests all around.

Marion County, Oregon gets 48 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Marion County averages 12 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 156 sunny days per year in Marion County. The US average is 205 sunny days.

Marion County gets some kind of precipitation, on average, 155 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 34
Rain: averages 48 inches of rain a year
Snow: averages 12 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Marion County is 7.2 (10=best), which means it is about average compared to other places in Oregon.

9.2 Summer - 5.2 Winter

August, July and September are the most pleasant months in Marion County, while December and January are the least comfortable months.

Climate	Marion, Oregon	United States
	48.1 in.	38.1 in.
	11.7 in.	27.8 in.
	155.4 days	106.2 days
	156 days	205 days
	80.4°	85.8°
	33.9°	21.7°
	7.2	7
	2.9	4.3
	1586 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 Marion County with an average high temperature of 80.9°, which ranks it as cooler than most places in Oregon. In Marion County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Marion County are July, September and August.

In Marion County, 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 Marion County with an average of 33.1°. This is about average compared to other places in Oregon.

In Marion County, there are 55.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Oregon.

In Marion County, there are 0.1 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

Humidity in Marion County 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 June.

December is the wettest month in Marion County with 7.7 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 48.1 inches in Marion County means that it is wetter than most places in Oregon.

November is the rainiest month in Marion County with 19.5 days of rain, and August is the driest month with only 3.4 rainy days. There are 155.4 rainy days annually in Marion County, which is rainier than most places in Oregon. The rainiest season is Spring when it rains 35% of the time and the driest is Autumn with only a 10% chance of a rainy day.

An annual snowfall of 11.7 inches in Marion County means that it is snowier than most places in Oregon. December is the snowiest month in Marion County with 2.9 inches of snow, and 6 months of the year have significant snowfall.