Lemhi County, ID Climate

Lemhi County, Idaho has a mild climate with warm summers and cold winters. In the summer months, the average high temperatures range from 65 to 80 degrees Fahrenheit, while in the winter months they typically drop to 20 to 35 degrees. Precipitation is fairly low throughout the year, with most of it occurring during snowfall in the winter months. This low precipitation makes Lemhi County an ideal location for outdoor activities year-round. Additionally, due to its elevation of over 5400 feet above sea level, Lemhi County experiences relatively low humidity and cool nights year-round.

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

Lemhi County averages 40 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 170 sunny days per year in Lemhi County. The US average is 205 sunny days.

Lemhi County gets some kind of precipitation, on average, 88 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 84 degrees
Winter Low: the January low is 9
Rain: averages 12 inches of rain a year
Snow: averages 40 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Lemhi County is 6.5 (10=best), which means it is less comfortable than most places in Idaho.

8.6 Summer - 4 Winter

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

Climate	Lemhi, Idaho	United States
	Unlock	38.1 in.
	40.3 in.	Unlock
	Unlock	106.2 days
	170 days	Unlock
	84.0°	85.8°
	Unlock	21.7°
	6.5	Unlock
	Unlock	4.3
	6928 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 Lemhi County with an average high temperature of 84.0°, which ranks it as cooler than most places in Idaho. In Lemhi County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Lemhi County are June, August and September.

In Lemhi County, there are 12.5 days annually when the high temperature is over 90°, which is cooler than most places in Idaho.

January has the coldest nighttime temperatures for Lemhi County with an average of 8.6°. This is one of the coldest places in Idaho.

In Lemhi County, there are 210.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Idaho.

In Lemhi County, there are 21.1 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Idaho.

Humidity is very low in Lemhi County, so low that the dry air may be uncomfortable for some people. There are few days during the year when the humidity is even noticable. A very dry climate can lead to cracked, itchy skin and dry eyes.

June is the wettest month in Lemhi County with 1.9 inches of rain, and the driest month is February with 0.6 inches. The wettest season is Autumn with 32% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 12.3 inches in Lemhi County means that it is drier than most places in Idaho.

May is the rainiest month in Lemhi County with 10.1 days of rain, and September is the driest month with only 5.3 rainy days. There are 87.8 rainy days annually in Lemhi County, which is less rainy than most places in Idaho. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 40.3 inches in Lemhi County means that it is about average compared to other places in Idaho. December is the snowiest month in Lemhi County with 11.1 inches of snow, and 8 months of the year have significant snowfall.

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