Yamhill County, OR Climate

Yamhill, OR County is characterized by a mild climate. The average yearly temperature is around 46 degrees Fahrenheit, with warm summers and cool winters. Precipitation in Yamhill County averages around 38 inches a year, most of which occurs during the winter months. Due to its location in the Willamette Valley, which has a unique microclimate, Yamhill County generally enjoys less precipitation than other parts of Oregon. However, fog can be frequent during the winter months. Winters in Yamhill are typically short and mild compared to other areas of Oregon due to its mild climate. Summers are warm and sunny with temperatures reaching into the mid 80s from June through August.

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

Yamhill County averages 3 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 Yamhill County. The US average is 205 sunny days.

Yamhill County gets some kind of precipitation, on average, 143 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 82 degrees
Winter Low: the January low is 34
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 Yamhill County is 7.4 (10=best), which means it is more comfortable than most places in Oregon.

9.2 Summer - 5.4 Winter

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

Climate	Yamhill, Oregon	United States
	43.4 in.	38.1 in.
	3.4 in.	27.8 in.
	142.8 days	106.2 days
	156 days	205 days
	81.8°	85.8°
	34.4°	21.7°
	7.4	7
	3	4.3
	699 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 Yamhill County with an average high temperature of 82.3°, which ranks it as about average compared to other places in Oregon. In Yamhill County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Yamhill County are September, July and August.

In Yamhill County, there are 14.6 days annually when the high temperature is over 90°, which is about average compared to other places in Oregon.

December has the coldest nighttime temperatures for Yamhill County with an average of 33.8°. This is about average compared to other places in Oregon.

In Yamhill County, there are 47.0 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Oregon.

In Yamhill 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 Yamhill 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.

December is the wettest month in Yamhill County with 7.4 inches of rain, and the driest month is July with 0.4 inches. The wettest season is Spring with 44% of yearly precipitation and 6% occurs in Autumn, which is the driest season. The annual rainfall of 43.4 inches in Yamhill County means that it is about average compared to other places in Oregon.

November is the rainiest month in Yamhill County with 18.7 days of rain, and August is the driest month with only 2.7 rainy days. There are 142.8 rainy days annually in Yamhill County, which is about average compared to other places in Oregon. The rainiest season is Spring when it rains 36% of the time and the driest is Autumn with only a 9% chance of a rainy day.

An annual snowfall of 3.4 inches in Yamhill County means that it is about average compared to other places in Oregon. December is the snowiest month in Yamhill County with 1.3 inches of snow, and 3 months of the year have significant snowfall.

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