Climate Insights for Aspen

The climate in Aspen is cold. The average annual temperature is 0°C and approximately 638mm of precipitation falls per year. March is the wettest month, receiving around 70mm of rainfall. Aspen is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are December, January, November, when temperatures can drop to -15°C. Aspen experiences heavy snowfall, typically from January through December.

Temperatures in Aspen vary considerably across the year, with a 35°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 20°C with a mean of 12°C. The coldest month is December, when overnight lows fall to -15°C and the daily average is -10°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 8°C shift in average temperatures.

Aspen is a relatively dry area, receiving approximately 638mm of precipitation annually, which averages out to around 53mm per month. The wettest month is March, averaging 70mm of rainfall. April and December also tend to see above-average precipitation. The driest month is June, with just 28mm. That's 42mm less than March, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Aspen receives heavy snowfall, accumulating around 315cm annually from January through December. The snowiest month is March, with approximately 50cm. Winter travel should account for significant snow cover.

Aspen is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months.

It is currently spring in Aspen, which began on March 20, 2026. Aspen is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 20°C, while the coldest stretch bottoms out in December near -15°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The table below shows monthly climate averages for Aspen based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.