Zip 81638 (Hamilton, CO) Climate

The climate of 81638 Hamilton, CO is typical for the Rocky Mountain region. The area experiences hot summers and cold winters with an average annual temperature of about 47 degrees Fahrenheit (8 degrees Celsius). Winters are characterized by snowfall which usually lasts until March or April. Summers are warmer with temperatures reaching well into the 80s (Fahrenheit) on some days. Precipitation is moderate, ranging from approximately 12 to 16 inches per year. Overall, Hamilton’s climate is mild and pleasant throughout the year.

Hamilton (zip 81638), Colorado gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Hamilton (zip 81638) averages 64 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 242 sunny days per year in Hamilton (zip 81638). The US average is 205 sunny days.

Hamilton (zip 81638) gets some kind of precipitation, on average, 94 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 6
Rain: averages 18 inches of rain a year
Snow: averages 64 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 81638 zip code is 6.5 (10=best), which means it is less comfortable than most places in Colorado.

8.8 Summer - 4.1 Winter

August, June and July are the most pleasant months in the 81638 zip code, while January and December are the least comfortable months.

Climate	Hamilton, Colorado	United States
	17.7 in.	38.1 in.
	64.4 in.	27.8 in.
	93.7 days	106.2 days
	242 days	205 days
	85.8°	85.8°
	6.1°	21.7°
	6.5	7
	5.8	4.3
	7102 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 the 81638 zip code with an average high temperature of 85.8°, which ranks it as about average compared to other places in Colorado. In the 81638 zip code, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 81638 zip code are June, September and August.

In the 81638 zip code, there are 12.4 days annually when the high temperature is over 90°, which is cooler than most places in Colorado.

January has the coldest nighttime temperatures for the 81638 zip code with an average of 6.1°. This is colder than most places in Colorado.

In the 81638 zip code, there are 203.0 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Colorado.

In the 81638 zip code, there are 24.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Colorado.

Humidity is very low in the 81638 zip code, 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.

October is the wettest month in the 81638 zip code with 1.9 inches of rain, and the driest month is January with 1.1 inches. The wettest season is Winter with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 17.7 inches in the 81638 zip code means that it is wetter than most places in Colorado.

May is the rainiest month in the 81638 zip code with 9.2 days of rain, and June is the driest month with only 6.5 rainy days. There are 93.7 rainy days annually in the 81638 zip code, which is rainier than most places in Colorado. The rainiest season is Summer when it rains 28% of the time and the driest is Autumn with only a 22% chance of a rainy day.

An annual snowfall of 64.4 inches in the 81638 zip code means that it is about average compared to other places in Colorado. December is the snowiest month in the 81638 zip code with 13.2 inches of snow, and 8 months of the year have significant snowfall.

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