Columbia County, OR Climate

Columbia County, OR is located in the Pacific Northwest region of the United States and has a humid temperate climate with mild winters and warm summers. Winters typically have cold temperatures, plenty of precipitation, and occasional snowfall. Summers are usually mild and dry, with temperatures usually ranging between 70-90°F (21-32°C). Precipitation is spread evenly throughout the year, with average annual rainfall totaling around 30 inches (76 cm). Columbia County also receives frequent sunshine due to its close proximity to the Pacific Ocean, making it a great place to enjoy outdoor activities.

Columbia County, Oregon gets 52 inches of rain, on average, per year. The US average is 38 inches of rain per year.

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

On average, there are 140 sunny days per year in Columbia County. The US average is 205 sunny days.

Columbia County gets some kind of precipitation, on average, 176 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 78 degrees
Winter Low: the January low is 33
Rain: averages 52 inches of rain a year
Snow: averages 3 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Columbia County is 7.1 (10=best), which means it is less comfortable than most places in Oregon.

9.2 Summer - 5 Winter

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

Climate	Columbia, Oregon	United States
	Unlock	38.1 in.
	3.2 in.	Unlock
	Unlock	106.2 days
	140 days	Unlock
	78.1°	85.8°
	Unlock	21.7°
	7.1	Unlock
	Unlock	4.3
	730 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 Columbia County with an average high temperature of 79.4°, which ranks it as cooler than most places in Oregon. In Columbia County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Columbia County are July, August and September.

In Columbia County, there are 8.5 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.

December has the coldest nighttime temperatures for Columbia County with an average of 32.2°. This is about average compared to other places in Oregon.

In Columbia County, there are 60.5 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Oregon.

In Columbia County, 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 Columbia 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 September.

November is the wettest month in Columbia County with 8.3 inches of rain, and the driest month is July with 0.8 inches. The wettest season is Spring with 41% of yearly precipitation and 8% occurs in Autumn, which is the driest season. The annual rainfall of 52.4 inches in Columbia County means that it is wetter than most places in Oregon.

November is the rainiest month in Columbia County with 21.2 days of rain, and August is the driest month with only 4.8 rainy days. There are 175.6 rainy days annually in Columbia County, which is one of the rainiest places in Oregon. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 12% chance of a rainy day.

An annual snowfall of 3.2 inches in Columbia County means that it is about average compared to other places in Oregon. February is the snowiest month in Columbia County with 1.2 inches of snow, and 3 months of the year have significant snowfall.

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