Aspen (CO) Rainfall & Precipitation: Monthly Averages and Year-Round Insights
This page shows both the average monthly rainfall and the number of rainy days in Aspen, Colorado, United States of America. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let’s explore all the details to give you a full picture.
Generally, Aspen receives mid-range precipitation levels, with 653 mm annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm)
Significant seasonal changes in precipitation occur throughout the year. During the wet season, December receives substantial snowfall, averaging 71 mm of precipitation, recorded across 17 snowy days.
In contrast, the drier season, June brings less rainfall, with 19 mm over 6 rainy days.December, the wettest month, has a maximum daytime temperature of 0°C. During the driest month June you can expect a temperature of 22°C. For more detailed insights into the city’s temperatures, visit our Aspen Temperature page.
Annual Precipitation in the United States of America
The map below shows the annual precipitation across the United States of America. You can also select the different months in case you are interested in a specific month.





Amsterdam Precipitation Compared World Wide
Aspen’s average annual precipitation is 653 mm. Let’s compare this to some popular worldwide tourist destinations:
In Barcelona, Spain, the average annual precipitation is 644 mm, evenly distributed across the year with no extreme wet or dry seasons.
Osaka, Japan, experiences 1507 mm of rainfall annually, spread across the year with wetter summers.
In Brisbane, Australia, the annual precipitation is 979 mm, making it wetter than Sydney.
Kuala Lumpur, Malaysia, receives 2529 mm of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.
How is Precipitation Measured?
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
How Does Precipitation Affect Local Climate?
Precipitation has a very strong role in determining the local climate and ecosystem:
- Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
- Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.
For more detailed information about Aspen (CO)’s weather, including sunshine hours, humidity levels, and temperature data, visit our Aspen (CO) Climate page.