Zip 80303 (Boulder, CO) Climate

The climate in Boulder, CO (80303) is quite mild and pleasant, with hot summers and cool winters. The average high temperatures for the summer months are typically in the low 80s Fahrenheit, while winter highs average around 45-50 degrees Fahrenheit. Precipitation is common year-round, with the heaviest amounts usually seen in May and June. Winters tend to be dry and sunny, while summers often see thunderstorms and afternoon showers. Snowfall is generally light, occurring mostly from December through March.

Boulder (zip 80303), Colorado gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Boulder (zip 80303) averages 71 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 Boulder (zip 80303). The US average is 205 sunny days.

Boulder (zip 80303) gets some kind of precipitation, on average, 88 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 89 degrees
Winter Low: the January low is 19
Rain: averages 18 inches of rain a year
Snow: averages 71 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 80303 zip code is 7.2 (10=best), which means it is more comfortable than most places in Colorado.

8.5 Summer - 5.6 Winter

September, June and August are the most pleasant months in the 80303 zip code, while December and January are the least comfortable months.

Climate	Boulder, Colorado	United States
	17.9 in.	38.1 in.
	71.1 in.	27.8 in.
	88.3 days	106.2 days
	245 days	205 days
	89.1°	85.8°
	19.3°	21.7°
	7.2	7
	5.8	4.3
	5315 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 80303 zip code with an average high temperature of 89.1°, which ranks it as warmer than most places in Colorado. In the 80303 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 80303 zip code are September, June and May.

In the 80303 zip code, there are 36.8 days annually when the high temperature is over 90°, which is hotter than most places in Colorado.

December has the coldest nighttime temperatures for the 80303 zip code with an average of 18.6°. This is one of the warmest places in Colorado.

In the 80303 zip code, there are 148.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Colorado.

In the 80303 zip code, there are 5.0 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

Humidity is low in the 80303 zip code, 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.

May is the wettest month in the 80303 zip code with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 17.9 inches in the 80303 zip code means that it is wetter than most places in Colorado.

May is the rainiest month in the 80303 zip code with 10.6 days of rain, and January is the driest month with only 4.8 rainy days. There are 88.3 rainy days annually in the 80303 zip code, which is rainier than most places in Colorado. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 71.1 inches in the 80303 zip code means that it is snowier than most places in Colorado. March is the snowiest month in the 80303 zip code with 13.9 inches of snow, and 9 months of the year have significant snowfall.

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