Summit County, CO Climate

Summit, CO County is known for its cold climate. The average annual temperature is only 35°F with an average annual snowfall of around 300 inches. Winters in Summit are long and cold, with temperatures dropping as low as -30°F on occasion. Summers are milder, but still cooler than most places in the United States. While it is possible to experience short periods of hot weather during the summer months, temperatures typically remain cool during the day and drop significantly at night. Snowfall occurs throughout the year, even during the summer months when rain can mix with snow making driving hazardous.

Summit County, Colorado gets 19 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Summit County averages 157 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 245 sunny days per year in Summit County. The US average is 205 sunny days.

Summit County gets some kind of precipitation, on average, 126 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 74 degrees
Winter Low: the January low is 6
Rain: averages 19 inches of rain a year
Snow: averages 157 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Summit County is 5.4 (10=best), which means it is one of the least comfortable places in Colorado.

8.2 Summer - 3.3 Winter

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

Climate	Summit, Colorado	United States
	19.3 in.	38.1 in.
	157.3 in.	27.8 in.
	125.8 days	106.2 days
	245 days	205 days
	74.1°	85.8°
	5.6°	21.7°
	5.4	7
	5.8	4.3
	10463 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 Summit County with an average high temperature of 74.1°, which ranks it as one of the coolest places in Colorado. In Summit County, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Summit County are July, August and June.

In Summit County, there are 0.0 days annually when the high temperature is over 90°, which is cooler than most places in Colorado.

January has the coldest nighttime temperatures for Summit County with an average of 5.6°. This is colder than most places in Colorado.

In Summit County, there are 249.8 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Colorado.

In Summit County, there are 29.8 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Colorado.

Humidity is very low in Summit 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.

August is the wettest month in Summit County with 2.2 inches of rain, and the driest month is January with 1.2 inches. The wettest season is Autumn with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 19.3 inches in Summit County means that it is wetter than most places in Colorado.

August is the rainiest month in Summit County with 13.6 days of rain, and October is the driest month with only 7.7 rainy days. There are 125.8 rainy days annually in Summit County, which is one of the rainiest places in Colorado. The rainiest season is Autumn when it rains 27% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 157.3 inches in Summit County means that it is one of the snowiest places in Colorado. April is the snowiest month in Summit County with 24.0 inches of snow, and 10 months of the year have significant snowfall.

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