Measured, not vibes
Best Time to Visit Aspen
By measured weather comfort, the top months for Aspen are September, June, August — and RouteVerdict's editorial pick, which also weighs crowds and prices, is January, February, March, September, December. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at Aspen (2405 m elevation).
Month by month
Aspen weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 0.1°C / 32°F | 9.8 | 3 | |
| February | 1.2°C / 34°F | 10.2 | 4 | |
| March | 4.9°C / 41°F | 11.7 | 10 | |
| April | 9.2°C / 49°F | 9.3 | 25 | |
| May | 14.7°C / 58°F | 8 | 55 | |
| June | 22.7°C / 73°F | 7.3 | 85 | Best |
| July | 26.5°C / 80°F | 6.5 | 81 | Shoulder |
| August | 25.7°C / 78°F | 6.5 | 83 | Best |
| September | 22°C / 72°F | 5 | 89 | Best |
| October | 14.3°C / 58°F | 6 | 55 | Shoulder |
| November | 5.6°C / 42°F | 7.3 | 13 | |
| December | 2°C / 36°F | 9.2 | 5 |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
FAQ
Aspen timing questions
What is the best month to visit Aspen?
By measured weather comfort (ERA5 2020–2024), the top months are September, June, and August, with September scoring highest. RouteVerdict's editorial pick is January, February, March, September, and December, which also weighs crowds, prices, and events.
What is the hottest month in Aspen?
July, with an average daily high of 26.5°C (80°F).
What is the rainiest month in Aspen?
March, averaging 11.7 days with at least 1 mm of precipitation.
When is shoulder season in Aspen?
July and October — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.