Jerome County, ID Climate

Jerome, ID County has a semi-arid climate with hot summers and cold winters. During the summer months, temperatures can reach up to 100 degrees Fahrenheit while winter temperatures often dip below freezing. Rainfall is sparse throughout the year, with an average of approximately 8 inches annually, and most of the precipitation occurs during the spring months. Winters are usually dry and sunny but can be accompanied by strong winds at times. Snowfall is rare but does occur occasionally in the higher elevations of Jerome County.

Jerome County, Idaho gets 11 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Jerome County averages 19 inches of snow per year. The US average is 28 inches of snow per year.

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

Jerome County gets some kind of precipitation, on average, 75 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 88 degrees
Winter Low: the January low is 20
Rain: averages 11 inches of rain a year
Snow: averages 19 inches of snow a year

Bestplaces Comfort Index

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

8.9 Summer - 5 Winter

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

Climate	Jerome, Idaho	United States
	10.7 in.	38.1 in.
	18.9 in.	27.8 in.
	75.2 days	106.2 days
	205 days	205 days
	88.2°	85.8°
	19.7°	21.7°
	7.1	7
	4	4.3
	3989 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 Jerome County with an average high temperature of 88.2°, which ranks it as warmer than most places in Idaho. In Jerome County, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jerome County are June, September and May.

In Jerome County, there are 31.5 days annually when the high temperature is over 90°, which is hotter than most places in Idaho.

December has the coldest nighttime temperatures for Jerome County with an average of 19.2°. This is about average compared to other places in Idaho.

In Jerome County, there are 149.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Idaho.

In Jerome County, there are 3.4 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Idaho.

Humidity is low in Jerome 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 Jerome County with 1.4 inches of rain, and the driest month is July with 0.3 inches. The wettest season is Summer with 32% of yearly precipitation and 13% occurs in Autumn, which is the driest season. The annual rainfall of 10.7 inches in Jerome County means that it is drier than most places in Idaho.

December is the rainiest month in Jerome County with 9.2 days of rain, and July is the driest month with only 2.4 rainy days. There are 75.2 rainy days annually in Jerome County, which is less rainy than most places in Idaho. 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 18.9 inches in Jerome County means that it is less snowy than most places in Idaho. January is the snowiest month in Jerome County with 5.4 inches of snow, and 7 months of the year have significant snowfall.

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