Sandhill cranes are often seen in springtime.

Following is weather information for each season. For a current forecast, call the National Weather Service for the San Luis Valley at (719) 589-3232, or visit the National Weather Service online forecast for the main visitor area of the park.  Because the park ranges in elevation from 7500' to over 13,000', this forecast is only valid for the 8000' level, where the main parking area and Visitor Center are located.  

Spring can sometimes bring high winds, especially in the afternoon. Temperatures may vary widely: highs may reach into the 60s F, or only into the 30s F with an even colder windchill. Lows can also vary from 0 degrees F to the 30s F. March and April are the snowiest months of the year, but some days, especially in later spring when Medano Creek is flowing, can also be swimsuit weather.

NPS Photo by Patrick Myers

Medano Creek flows in late spring and early summer during normal to wet years.

In summer, daytime air temperatures  average in the 70s-80s F. However, sand surface temperatures can soar to 140 degrees F on sunny summer afternoons.  Summer nights are surprisingly cool, thanks to our elevation of 8200' above sea level. Even in summer, warm layered clothing is recommended, as lows may drop into the 40s. After dark, a warm coat or a blanket are necessities. Afternoon thundershowers are common in July and August with associated winds and lightning. Be prepared to leave the dunes promptly if thunderstorms threaten: lightning strikes are common and can be fatal.