Great Sand Dunes National Park weather in May
May in Great Sand Dunes National Park: nice, a little rain — one of the best months to visit.
#2 of 12 months in Great Sand Dunes National Park · #58 of 604 destinations to visit in May · comfort 91/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Great Sand Dunes National Park climate normals — May
| Daytime high | 20°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 5°C / 41°F | |
| Feels like (high) | 16°C / 61°F | |
| Rainfall | 37 mm / 1.5 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 44% | 🍃 comfortable |
| Dew point | -2°C / 28°F | |
| Sunshine | 12.3 h/day | |
| Daylight | 14.2 h | |
| Wind | 20 km/h / 12 mph | |
| Snowfall | 6.3 cm / 2.5 in | |
| Air quality (US AQI) | 54 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Great Sand Dunes National Park?
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Great Sand Dunes National Park in May — FAQ
- Is May a good time to visit Great Sand Dunes National Park?
- May in Great Sand Dunes National Park: nice, a little rain — one of the best months to visit. It ranks #2 of 12 months for Great Sand Dunes National Park on SeasonMap's comfort score (91/100).
- What is the weather like in Great Sand Dunes National Park in May?
- In May, Great Sand Dunes National Park averages a daily high of 19.6°C and a low of 5.2°C, with about 37.4 mm of rain over roughly 7.8 rainy days.
- What is the air quality in Great Sand Dunes National Park in May?
- Great Sand Dunes National Park has a mean US Air Quality Index of about 54 in May.
- Does it snow in Great Sand Dunes National Park in May?
- Great Sand Dunes National Park sees roughly 6.3 cm of snowfall in May.