Ada County, ID Climate

Ada County, Idaho has a continental climate characterized by warm summers and cold winters. The average temperature in the summer months is between 62°F (17°C) and 86°F (30°C), while the average winter temperature ranges from 22°F (-6°C) to 41°F (5°C). Precipitation is common year-round, with an average of 16 inches (41 cm) of rain per year. Snowfall is also common, with an average of 38 inches (97 cm) of snowfall annually. Ada County experiences all four seasons, making it a great place for outdoor activities such as hiking, biking, camping, fishing, and skiing.

Ada County, Idaho gets 13 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Ada County averages 16 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 210 sunny days per year in Ada County. The US average is 205 sunny days.

Ada County gets some kind of precipitation, on average, 86 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 92 degrees
Winter Low: the January low is 24
Rain: averages 13 inches of rain a year
Snow: averages 16 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Ada County is 7.2 (10=best), which means it is one of the most pleasant places in Idaho.

8.5 Summer - 5.1 Winter

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

Climate	Ada, Idaho	United States
	12.7 in.	38.1 in.
	16.4 in.	27.8 in.
	86.3 days	106.2 days
	210 days	205 days
	91.5°	85.8°
	23.5°	21.7°
	7.2	7
	4.1	4.3
	3065 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 Ada County with an average high temperature of 91.5°, which ranks it as one of the hottest places in Idaho. In Ada County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Ada County are September, June and May.

In Ada County, there are 50.3 days annually when the high temperature is over 90°, which is one of the hottest places in Idaho.

December has the coldest nighttime temperatures for Ada County with an average of 22.6°. This is warmer than most places in Idaho.

In Ada County, there are 117.4 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Idaho.

In Ada County, there are 2.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Idaho.

Humidity is low in Ada 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 Ada County with 1.8 inches of rain, and the driest month is July with 0.3 inches. The wettest season is Spring with 35% of yearly precipitation and 10% occurs in Autumn, which is the driest season. The annual rainfall of 12.7 inches in Ada County means that it is drier than most places in Idaho.

December is the rainiest month in Ada County with 11.2 days of rain, and August is the driest month with only 2.3 rainy days. There are 86.3 rainy days annually in Ada County, which is less rainy than most places in Idaho. The rainiest season is Spring when it rains 35% of the time and the driest is Autumn with only a 12% chance of a rainy day.

An annual snowfall of 16.4 inches in Ada County means that it is less snowy than most places in Idaho. December is the snowiest month in Ada County with 6.1 inches of snow, and 5 months of the year have significant snowfall.

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