San Juan County, UT Climate

San Juan County in Utah has a mild, semi-arid climate, with plenty of sunshine throughout the year. Temperatures generally range from the mid-20s during wintertime to the mid-80s during summertime. Rainfall is generally light and widely distributed throughout the year, though snow can be expected during winter months. Due to the low humidity that is typical of desert climates, temperatures rarely feel overly hot or cold. The area also experiences frequent windy days due to its location along the edge of the Colorado Plateau.

San Juan County, Utah gets 10 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Juan County averages 17 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 254 sunny days per year in San Juan County. The US average is 205 sunny days.

San Juan County gets some kind of precipitation, on average, 52 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 94 degrees
Winter Low: the January low is 21
Rain: averages 10 inches of rain a year
Snow: averages 17 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for San Juan County is 7.5 (10=best), which means it is one of the most pleasant places in Utah.

7.9 Summer - 5.9 Winter

May, September and October are the most pleasant months in San Juan County, while January and December are the least comfortable months.

Climate	San Juan, Utah	United States
	9.8 in.	38.1 in.
	16.7 in.	27.8 in.
	51.8 days	106.2 days
	254 days	205 days
	93.7°	85.8°
	20.6°	21.7°
	7.5	7
	6	4.3
	5653 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 San Juan County with an average high temperature of 93.7°, which ranks it as warmer than most places in Utah. In San Juan County, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Juan County are May, September and October.

In San Juan County, there are 61.8 days annually when the high temperature is over 90°, which is one of the hottest places in Utah.

January has the coldest nighttime temperatures for San Juan County with an average of 20.6°. This is warmer than most places in Utah.

In San Juan County, there are 127.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Utah.

In San Juan County, there are 1.6 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Utah.

Humidity is low in San Juan 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.

September is the wettest month in San Juan County with 1.2 inches of rain, and the driest month is June with 0.3 inches. The wettest season is Winter with 32% of yearly precipitation and 21% occurs in Summer, which is the driest season. The annual rainfall of 9.8 inches in San Juan County means that it is drier than most places in Utah.

August is the rainiest month in San Juan County with 5.9 days of rain, and June is the driest month with only 2.1 rainy days. There are 51.8 rainy days annually in San Juan County, which is one of the least rainy places in Utah. The rainiest season is Winter when it rains 26% of the time and the driest is Summer with only a 25% chance of a rainy day.

An annual snowfall of 16.7 inches in San Juan County means that it is less snowy than most places in Utah. January is the snowiest month in San Juan County with 4.3 inches of snow, and 6 months of the year have significant snowfall.

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