Idaho Climate


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Idaho State has a unique climate that varies throughout the state. Summers tend to be warm and sunny, while winters can range from mild to cold depending on elevation and location. The northern part of the state is typically much cooler and receives more precipitation than the southern region, which is generally dryer. Snowfall can also be quite heavy in some areas of Idaho State during the winter months. Overall, Idaho State experiences much more variability in its climate than other parts of the United States, making it an interesting place to explore year-round.

Idaho, Idaho gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Idaho averages 47 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 197 sunny days per year in Idaho. The US average is 205 sunny days.

Idaho gets some kind of precipitation, on average, 99 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 17
Rain: averages 18 inches of rain a year
Snow: averages 47 inches of snow a year


Bestplaces Comfort Index

Idaho's annual BestPlaces Comfort Index of 6.7 (10=best) indicates it is less comfortable than most states in the United States.

8.7 Summer - 4.2 Winter
June, September and August are the most pleasant months in the state of Idaho, while December and January are the least comfortable months.

  ClimateIdaho, IdahoUnited States
  18.0 in.38.1 in.
  47.4 in.27.8 in.
  98.7 days106.2 days
  197 days205 days
  85.4°85.8°
  17.2°21.7°
  6.77
  44.3
  4843 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.

July is the hottest month for Idaho with an average high temperature of 85.4°, which ranks it as about average compared to other states. In Idaho, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Idaho are June, September and August.
Idaho has 23.4 days annually when the high temperature is over 90°, which is about average compared to other states in the U.S.
December has the coldest nighttime temperatures for Idaho with an average of 17.0°. This is colder than most of the U.S. states.
Idaho has 165.4 days annually when the nighttime low temperature falls below freezing, which is colder than most states in the U.S.
Idaho averages 10.1 days annually when the nighttime low temperature falls below freezing, which is colder than most states in the U.S.
Humidity is low in the state of Idaho, 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 Idaho with 2.1 inches of rain, and the driest month is August with 0.7 inches. The wettest season is Spring with 30% of yearly precipitation and 17% occurs in Autumn, which is the driest season. Idaho's average annual rainfall of 18.0 inches indicates that it is drier than most states in the United States.
December is the rainiest month in Idaho with 10.9 days of rain, and August is the driest month with only 4.3 rainy days. Idaho's annual average of 98.7 days with measurable rain is less rainy than most states in the United States. The rainiest season is Spring when it rains 31% of the time and the driest is Autumn with only a 17% chance of a rainy day.
Idaho's average annual snowfall of 47.4 inches indicates that it is snowier than most states in the United States. December is the snowiest month in Idaho with 13.7 inches of snow, and 7 months of the year have significant snowfall.
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