Jefferson County, Colorado 

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Climate in Jefferson County, Colorado

Jefferson County, Colorado gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Jefferson County averages 72 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 Jefferson County. The US average is 205 sunny days.

Jefferson County gets some kind of precipitation, on average, 83 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 86 degrees
Winter Low: the January low is 17
Rain: averages 18 inches of rain a year
Snow: averages 72 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for Jefferson County is 7.1 (10=best), which means it is about average compared to other places in Colorado.

7.1 / 10
June, September and August are the most pleasant months in Jefferson County, while December and January are the least comfortable months.

Climate Averages
  Jefferson, ColoradoUnited States
  18.2 in.38.1 in.
  72.0 in.27.8 in.
  83.2 days106.2 days
  245 days205 days
  86.1°85.8°
  17.4°21.7°
  7.17
  5.74.3
  7149 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 Jefferson County with an average high temperature of 86.1°, which ranks it as about average compared to other places in Colorado. In Jefferson County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jefferson County are June, September and August.


December has the coldest nighttime temperatures for Jefferson County with an average of 16.7°. This is warmer than most places in Colorado.


In Jefferson County, there are 24.3 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.


In Jefferson County, there are 163.0 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Colorado.


In Jefferson County, there are 6.8 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Colorado.


May is the wettest month in Jefferson County with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 36% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 18.2 inches in Jefferson County means that it is wetter than most places in Colorado.


August is the rainiest month in Jefferson County with 10.1 days of rain, and January is the driest month with only 4.4 rainy days. There are 83.2 rainy days annually in Jefferson County, which is rainier than most places in Colorado. The rainiest season is Autumn when it rains 33% of the time and the driest is Spring with only a 16% chance of a rainy day.


An annual snowfall of 72.0 inches in Jefferson County means that it is snowier than most places in Colorado. March is the snowiest month in Jefferson County with 14.7 inches of snow, and 9 months of the year have significant snowfall.





  • Annual Rainfall (US Avg: 36.5")
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    MAPS OF JEFFERSON COUNTY, COLORADO
    ZIP CODES IN JEFFERSON COUNTY, COLORADO
    80123, 80127, 80401, 80004, 80003, 80128, 80227, 80228, 80021, 80226, ... 28 more


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