- Best time to visit Great Sand Dunes: May and August to October. The weather is at its most comfortable then, and crowds are lighter than at the peak.
- Busiest month: June, with about 85,527 visits in a typical recent year. That is 3.5 times as many as March.
- Quietest month: January (5,744 visits), when weather or closures keep most people away.
- Cold: average highs stay below 40°F in January, February and December.
- Snow: January to April and December average 6 inches or more of snow at the station.
Bar height: visitors that month, compared with the busiest month. Temperatures: average daily high and low (°F); rain and snow: monthly averages. Best marks the months we suggest.
Month by month
| Month | Crowds | Visits (typical) | High / low (°F) | Precipitation | Snow |
|---|---|---|---|---|---|
| January | Very quiet | 5,744 | 33° / 11° | 0.6 in | 8 in |
| February | Very quiet | 8,003 | 39° / 16° | 0.4 in | 6 in |
| March | Quiet | 24,159 | 48° / 24° | 0.9 in | 8 in |
| April | Quiet | 24,581 | 56° / 29° | 1.2 in | 8 in |
| May ★ | Busy | 67,071 | 66° / 38° | 1.2 in | 2 in |
| June | Busiest | 85,527 | 77° / 48° | 0.7 in | 0 in |
| July | Busiest | 80,637 | 81° / 52° | 2.1 in | 0 in |
| August ★ | Busy | 63,210 | 78° / 50° | 1.9 in | 0 in |
| September ★ | Moderate | 47,928 | 72° / 44° | 1.3 in | 0 in |
| October ★ | Moderate | 38,085 | 60° / 33° | 0.9 in | 3 in |
| November | Very quiet | 12,336 | 46° / 22° | 0.5 in | 6 in |
| December | Very quiet | 8,026 | 34° / 12° | 0.5 in | 7 in |
Weather figures are NOAA 1991 to 2020 climate normals for the Great Sand Dunes NP & Preserve station (8,183 feet above sea level), 0 miles from Great Sand Dunes Visitor Center. Visitor numbers are the median of 2022 to 2025 monthly recreation visits from the National Park Service.
By season
- Spring (March to May): 25% of the year’s visits; average highs 48° to 66°F.
- Summer (June to August): 49% of the year’s visits; average highs 77° to 81°F.
- Fall (September to November): 21% of the year’s visits; average highs 46° to 72°F.
- Winter (December to February): 5% of the year’s visits; average highs 33° to 39°F.
Weekends and holidays
Even in a quiet month, holiday weekends fill parking lots and campgrounds. The 2027 federal holidays to plan around:
- Martin Luther King Jr. Day: Monday, January 18
- Presidents Day: Monday, February 15
- Memorial Day: Monday, May 31
- Juneteenth: Saturday, June 19
- Independence Day: Sunday, July 4 (observed Monday, July 5)
- Labor Day: Monday, September 6
- Columbus Day and Indigenous Peoples Day: Monday, October 11
- Veterans Day: Thursday, November 11
- Thanksgiving: Thursday, November 25
Entrance is free for U.S. residents on the park service’s fee-free days. The last one in 2026 is Veterans Day, November 11; the 2027 dates had not been announced when we checked. Free days are often busier. See the crowd calendar for all 64 parks.
Weather, in the park service’s words
Temperatures are relatively cool all year at the park elevation 8000 ft. Conditions are most often calm, but winds can arise, especially in spring and during storm fronts. Daytime temperatures feel warmer here year round due to intense high-altitude sunlight, and mid-day summer sand surface temps can be 160 degrees F! Plan to explore the dunes morning or evening during summer. Nights are cool in summer, and frigid in winter. Visit https://nps.gov/grsa/planyourvisit/weather.htm for details
From the National Park Service (public domain).
Today at Great Sand Dunes
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Alerts: National Park Service, checked hourly. Forecast: National Weather Service, for Great Sand Dunes Visitor Center. Always confirm on the official park site before you set out.
Sources
- National Park Service visitor use statistics (IRMA): monthly recreation visits, 2022 to 2025
- NOAA NCEI U.S. Climate Normals, 1991 to 2020 (monthly)
- National Park Service Data API: weather overview (public domain)
Last checked 1 November 2026.