Jefferson County, OR Climate

Jefferson, OR County has a mild climate with warm summers and cool winters. The average temperature in January is around 37 °F, while the average temperature in July is 69 °F. The region typically receives precipitation during the winter months, with an average of about 25 inches of rain each year. Snowfall is rare, but the area does occasionally experience cold spells throughout the year. With its temperate climate and ample precipitation, Jefferson, OR County provides a perfect environment for outdoor activities such as hiking and boating.

Jefferson County, Oregon gets 12 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Jefferson County averages 18 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 155 sunny days per year in Jefferson County. The US average is 205 sunny days.

Jefferson County gets some kind of precipitation, on average, 83 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 85 degrees
Winter Low: the January low is 25
Rain: averages 12 inches of rain a year
Snow: averages 18 inches of snow a year

Bestplaces Comfort Index

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

8.9 Summer - 5.2 Winter

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

Climate	Jefferson, Oregon	United States
	Unlock	38.1 in.
	17.5 in.	Unlock
	Unlock	106.2 days
	155 days	Unlock
	85.2°	85.8°
	Unlock	21.7°
	7.1	Unlock
	Unlock	4.3
	3260 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.

July is the hottest month for Jefferson County with an average high temperature of 85.2°, which ranks it as warmer than most places in Oregon. In Jefferson County, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jefferson County are September, June and August.

In Jefferson County, there are 24.4 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

December has the coldest nighttime temperatures for Jefferson County with an average of 22.8°. This is colder than most places in Oregon.

In Jefferson County, there are 156.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Jefferson County, there are 2.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

Humidity is low in Jefferson County, and some people might find the dryness to be uncomfortable. Days with noticeable humidity are rare throughout the year. A very dry climate can lead to cracked, itchy skin and dry eyes.

December is the wettest month in Jefferson County with 1.5 inches of rain, and the driest month is August with 0.4 inches. The wettest season is Spring with 35% of yearly precipitation and 15% occurs in Autumn, which is the driest season. The annual rainfall of 11.5 inches in Jefferson County means that it is one of the driest places in Oregon.

November is the rainiest month in Jefferson County with 10.1 days of rain, and August is the driest month with only 2.7 rainy days. There are 83.2 rainy days annually in Jefferson County, which is less rainy than most places in Oregon. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 14% chance of a rainy day.

An annual snowfall of 17.5 inches in Jefferson County means that it is snowier than most places in Oregon. December is the snowiest month in Jefferson County with 5.4 inches of snow, and 6 months of the year have significant snowfall.

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