Black Canyon of the Gunnison National Park weather in September
September in Black Canyon of the Gunnison National Park: nice, dry, with clean air — an excellent time to visit.
#3 of 12 months in Black Canyon of the Gunnison National Park · #60 of 604 destinations to visit in September · comfort 90/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Black Canyon of the Gunnison National Park climate normals — September
| Daytime high | 25°C / 77°F | 😎 nice |
|---|---|---|
| Nighttime low | 8°C / 46°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 18 mm / 0.7 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 38% | 🌵 dry |
| Dew point | 0°C / 32°F | |
| Sunshine | 11.2 h/day | |
| Daylight | 12.4 h | |
| Wind | 12 km/h / 8 mph | |
| Snowfall | 0.4 cm / 0.2 in | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Black Canyon of the Gunnison National Park?
Loading map…
Black Canyon of the Gunnison National Park in September — FAQ
- Is September a good time to visit Black Canyon of the Gunnison National Park?
- September in Black Canyon of the Gunnison National Park: nice, dry, with clean air — an excellent time to visit. It ranks #3 of 12 months for Black Canyon of the Gunnison National Park on SeasonMap's comfort score (90/100).
- What is the weather like in Black Canyon of the Gunnison National Park in September?
- In September, Black Canyon of the Gunnison National Park averages a daily high of 24.9°C and a low of 8°C, with about 18.2 mm of rain over roughly 4.2 rainy days.
- What is the air quality in Black Canyon of the Gunnison National Park in September?
- Black Canyon of the Gunnison National Park has a mean US Air Quality Index of about 38 in September.