Weather on April 21 at Great Sand Dunes
Great Sand Dunes National Park and Preserve
Based on 56 years of data from Alamosa, CO
Elevation Note: Great Sand Dunes sits at 8,200 ft. Expect temperatures 29°F cooler than the data shown below, which comes from Alamosa, CO at a lower elevation.
Planning Your Visit
April 21st in Great Sand Dunes National Park (via Alamosa, CO) typically brings mild spring weather, with average highs around 62°F and lows near 25°F — a 37°F daily swing. Over 56 years of records, the warmest April 21st was in 1989 (55°F average), while the coldest was 1982 (30°F) — a 25°F range across recorded history. Precipitation has occurred on 14% of recorded April 21st dates, with snow falling 4% of the time. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for April 21st in Great Sand Dunes? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 75°F | 30°F | 0" | 0" |
| 2025 | 55°F | 21°F | 0" | 0" |
| 2024 | 66°F | 26°F | 0.05" | 0" |
| 2023 | 48°F | 13°F | 0" | 0" |
| 2022 | 72°F | 28°F | 0" | 0" |
| 2021 | 56°F | 18°F | 0" | 0" |
| 2020 | 64°F | 24°F | 0.1" | 0" |
| 2019 | 73°F | 29°F | 0" | 0" |
| 2018 | 49°F | 27°F | 0.25" | 0.3" |
| 2017 | 64°F | 34°F | 0" | 0" |
| 2016 | 52°F | 25°F | 0" | 0" |
| 2015 | 56°F | 23°F | 0" | 0" |
| 2014 | 66°F | 33°F | 0" | 0" |
| 2013 | 55°F | 17°F | 0" | 0" |
| 2012 | 67°F | 23°F | 0" | -- |
| 2011 | 69°F | 38°F | 0" | -- |
| 2010 | 64°F | 32°F | 0.03" | 0" |
| 2009 | 68°F | 26°F | 0" | 0" |
| 2008 | 63°F | 26°F | 0" | 0" |
| 2007 | 63°F | 21°F | 0" | 0" |
| 2006 | 69°F | 20°F | 0" | 0" |
| 2005 | 63°F | 17°F | 0" | 0" |
| 2004 | 57°F | 22°F | 0.05" | 0" |
| 2003 | 62°F | 29°F | 0.23" | 0" |
| 2002 | 59°F | 12°F | 0" | 0" |
| 2001 | 62°F | 25°F | 0" | 0" |
| 2000 | 73°F | 29°F | 0" | 0" |
| 1999 | 59°F | 36°F | 0" | 0" |
| 1998 | 60°F | 20°F | 0" | 0" |
| 1997 | 66°F | 32°F | 0" | 0" |
| 1996 | 55°F | 17°F | 0" | 0" |
| 1995 | 44°F | 24°F | 0" | 0" |
| 1994 | 71°F | 27°F | 0" | 0" |
| 1993 | 66°F | 20°F | 0" | 0" |
| 1992 | 64°F | 21°F | 0" | 0" |
| 1991 | 61°F | 34°F | 0" | 0" |
| 1990 | 68°F | 32°F | 0.03" | 0" |
| 1989 | 79°F | 31°F | 0" | 0" |
| 1988 | 61°F | 29°F | 0" | 0" |
| 1987 | 58°F | 18°F | 0" | 0" |
| 1986 | 71°F | 27°F | 0" | 0" |
| 1985 | 51°F | 32°F | 0" | 0" |
| 1984 | 45°F | 20°F | 0" | 0" |
| 1983 | 60°F | 30°F | 0" | 0" |
| 1982 | 40°F | 20°F | 0.23" | 0.9" |
| 1981 | 69°F | 25°F | 0" | 0" |
| 1980 | 72°F | 28°F | 0" | 0" |
| 1979 | 66°F | 18°F | 0" | 0" |
| 1978 | 62°F | 28°F | 0" | 0" |
| 1977 | 57°F | 26°F | 0" | 0" |
| 1976 | 65°F | 22°F | 0" | 0" |
| 1975 | 67°F | 23°F | 0" | 0" |
| 1974 | 60°F | 17°F | 0" | 0" |
| 1973 | 50°F | 18°F | 0" | 0" |
| 1972 | 57°F | 14°F | 0" | 0" |
| 1971 | 54°F | 27°F | 0" | 0" |