Boulder (zip 80301), Colorado, gets 16 inches of rain per year. The US average is 39. Snowfall is 80 inches. The average US city gets 26 inches of snow per year. The number of days with any measurable precipitation is 49.
On average, there are 245 sunny days per year in Boulder (zip 80301), Colorado. The July high is around 89 degrees. The January low is 17. Sperling's comfort index for Boulder (zip 80301) is a 73 out of 100, where a higher score indicates a more comfortable year-around climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.
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