Weather on October 20 at Great Sand Dunes
Great Sand Dunes National Park and Preserve
Based on 55 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
October 20th in Great Sand Dunes National Park (via Alamosa, CO) typically brings mild fall weather, with average highs around 62°F and lows near 22°F — a 40°F daily swing. Over 55 years of records, the warmest October 20th was in 1979 (55°F average), while the coldest was 1984 (31°F) — a 24°F range across recorded history. Precipitation has occurred on 13% of recorded October 20th dates, with snow falling 2% of the time. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Great Sand Dunes? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 72°F | 23°F | 0" | 0" |
| 2024 | 47°F | 34°F | 0.69" | 0" |
| 2023 | 76°F | 26°F | 0" | 0" |
| 2022 | 69°F | 21°F | 0" | 0" |
| 2021 | 56°F | 16°F | 0" | 0" |
| 2020 | 73°F | 26°F | 0" | 0" |
| 2019 | 60°F | 18°F | 0" | 0" |
| 2018 | 60°F | 20°F | 0" | 0" |
| 2017 | 70°F | 27°F | 0" | 0" |
| 2016 | 64°F | 15°F | 0" | 0" |
| 2015 | 64°F | 32°F | 0.05" | 0" |
| 2014 | 68°F | 36°F | 0" | 0" |
| 2013 | 55°F | 16°F | 0" | 0" |
| 2012 | 69°F | 19°F | 0" | -- |
| 2011 | 64°F | 16°F | 0" | -- |
| 2010 | 63°F | 18°F | 0" | 0" |
| 2009 | 69°F | 28°F | 0" | 0" |
| 2008 | 69°F | 27°F | 0" | 0" |
| 2007 | 64°F | 11°F | 0" | 0" |
| 2006 | 52°F | 16°F | 0" | 0" |
| 2005 | 62°F | 26°F | 0" | 0" |
| 2004 | 63°F | 34°F | 0" | 0" |
| 2003 | 75°F | 21°F | 0" | 0" |
| 2002 | 60°F | 24°F | 0" | 0" |
| 2001 | 68°F | 18°F | 0" | 0" |
| 2000 | 65°F | 19°F | 0" | 0" |
| 1999 | 60°F | 17°F | 0" | 0" |
| 1998 | 43°F | 31°F | 0.38" | 0" |
| 1997 | 60°F | 28°F | 0.05" | 0" |
| 1996 | 48°F | 22°F | 0" | 0" |
| 1995 | 62°F | 12°F | 0" | 0" |
| 1994 | 56°F | 20°F | 0" | 0" |
| 1993 | 56°F | 16°F | 0" | 0" |
| 1992 | 69°F | 22°F | 0" | 0" |
| 1991 | 69°F | 27°F | 0" | 0" |
| 1990 | 37°F | 27°F | 0.38" | 0" |
| 1989 | 60°F | 10°F | 0" | 0" |
| 1988 | 70°F | 21°F | 0" | 0" |
| 1987 | 62°F | 11°F | 0" | 0" |
| 1986 | 47°F | 32°F | 1.32" | 0.2" |
| 1985 | 60°F | 25°F | 0" | 0" |
| 1984 | 42°F | 20°F | 0" | 0" |
| 1983 | 54°F | 29°F | 0" | 0" |
| 1982 | 60°F | 25°F | 0" | 0" |
| 1981 | 65°F | 16°F | 0" | 0" |
| 1980 | 58°F | 13°F | 0" | 0" |
| 1979 | 64°F | 46°F | 0" | 0" |
| 1978 | 67°F | 22°F | 0" | 0" |
| 1977 | 67°F | 27°F | 0" | 0" |
| 1976 | 55°F | 9°F | 0" | 0" |
| 1975 | 69°F | 19°F | 0" | 0" |
| 1974 | 69°F | 30°F | 0" | 0" |
| 1973 | 70°F | 24°F | 0" | 0" |
| 1972 | 57°F | 34°F | 0.13" | 0" |
| 1971 | 58°F | 15°F | 0" | 0" |