Weather on March 18 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
March 18th in Great Sand Dunes National Park (via Alamosa, CO) typically brings cool spring weather, with average highs around 53°F and lows near 18°F — a 35°F daily swing. Over 56 years of records, the warmest March 18th was in 2026 (51°F average), while the coldest was 1971 (20°F) — a 31°F range across recorded history. Precipitation has occurred on 14% of recorded March 18th dates, with snow falling 14% of the time (heaviest snowfall: 3.2"). The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.3°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in Great Sand Dunes? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 76°F | 26°F | 0" | 0" |
| 2025 | 62°F | 25°F | 0" | 0" |
| 2024 | 44°F | 20°F | 0" | 0.2" |
| 2023 | 32°F | 10°F | 0.05" | 1" |
| 2022 | 43°F | 8°F | 0.13" | 0.3" |
| 2021 | 50°F | 17°F | 0" | 0" |
| 2020 | 61°F | 20°F | 0" | 0" |
| 2019 | 54°F | 19°F | 0" | 0" |
| 2018 | 53°F | 17°F | 0" | 0" |
| 2017 | 70°F | 27°F | 0" | 0" |
| 2016 | 58°F | 18°F | 0" | 0" |
| 2015 | 60°F | 31°F | 0" | 0" |
| 2014 | 58°F | 22°F | 0" | 0" |
| 2013 | 56°F | 16°F | 0" | 0" |
| 2012 | 62°F | 27°F | 0" | 0" |
| 2011 | 64°F | 28°F | 0" | -- |
| 2010 | 60°F | 19°F | 0" | 0" |
| 2009 | 65°F | 17°F | 0" | 0" |
| 2008 | 44°F | 12°F | 0" | 0" |
| 2007 | 71°F | 23°F | 0" | 0" |
| 2006 | 54°F | 22°F | 0" | 0" |
| 2005 | 47°F | 16°F | 0" | 0" |
| 2004 | 65°F | 20°F | 0" | 0" |
| 2003 | 34°F | 29°F | 0.51" | 3.2" |
| 2002 | 46°F | 12°F | 0" | 0" |
| 2001 | 45°F | 18°F | 0" | 0" |
| 2000 | 40°F | 11°F | 0" | 0" |
| 1999 | 43°F | 25°F | 0.28" | 1.1" |
| 1998 | 34°F | 19°F | 0.33" | 1" |
| 1997 | 59°F | 21°F | 0" | 0" |
| 1996 | 42°F | 5°F | 0" | 0" |
| 1995 | 61°F | 16°F | 0" | 0" |
| 1994 | 63°F | 17°F | 0" | 0" |
| 1993 | 53°F | 26°F | 0.2" | 0" |
| 1992 | 40°F | 14°F | 0" | 0" |
| 1991 | 58°F | 16°F | 0" | 0" |
| 1990 | 57°F | 22°F | 0" | 0" |
| 1989 | 64°F | 12°F | 0" | 0" |
| 1988 | 45°F | 4°F | 0" | 0" |
| 1987 | 52°F | 16°F | 0" | 0" |
| 1986 | 37°F | 12°F | 0.38" | 1.5" |
| 1985 | 54°F | 16°F | 0" | 0" |
| 1984 | 39°F | 26°F | 0.1" | 0.4" |
| 1983 | 43°F | 22°F | 0" | 0" |
| 1982 | 52°F | 28°F | 0" | 0" |
| 1981 | 45°F | 18°F | 0" | 0" |
| 1980 | 53°F | 7°F | 0" | 0" |
| 1979 | 43°F | 21°F | 0" | 0" |
| 1978 | 64°F | 11°F | 0" | 0" |
| 1977 | 43°F | 9°F | 0" | 0" |
| 1976 | 61°F | 15°F | 0" | 0" |
| 1975 | 50°F | 14°F | 0" | 0" |
| 1974 | 61°F | 25°F | 0" | 0" |
| 1973 | 51°F | 28°F | 0" | 0" |
| 1972 | 67°F | 19°F | 0" | 0" |
| 1971 | 33°F | 7°F | 0" | 0" |