Weather on September 23 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
September 23rd in Great Sand Dunes National Park (via Alamosa, CO) typically brings pleasant fall weather, with average highs around 71°F and lows near 35°F — a 36°F daily swing. Over 55 years of records, the warmest September 23rd was in 2015 (63°F average), while the coldest was 2006 (38°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 16% of September 23rd dates historically, with the wettest September 23rd recording 2.49" of rain. 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 September 23rd in Great Sand Dunes? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 66°F | 33°F | 0" | 0" |
| 2024 | 58°F | 31°F | 0" | 0" |
| 2023 | 74°F | 38°F | 0" | 0" |
| 2022 | 67°F | 41°F | 0.03" | 0" |
| 2021 | 77°F | 29°F | 0" | 0" |
| 2020 | 75°F | 35°F | 0" | 0" |
| 2019 | 74°F | 28°F | 0" | 0" |
| 2018 | 76°F | 39°F | 0" | 0" |
| 2017 | 73°F | 42°F | 0.25" | 0" |
| 2016 | 72°F | 52°F | 0" | 0" |
| 2015 | 78°F | 48°F | 0.48" | 0" |
| 2014 | 75°F | 40°F | 0" | 0" |
| 2013 | 72°F | 37°F | 2.49" | 0" |
| 2012 | 80°F | 33°F | 0" | 0" |
| 2011 | 74°F | 26°F | 0" | -- |
| 2010 | 68°F | 44°F | 1.32" | 0" |
| 2009 | 55°F | 25°F | 0" | 0" |
| 2008 | 73°F | 27°F | 0" | 0" |
| 2007 | 76°F | 38°F | 0" | 0" |
| 2006 | 54°F | 22°F | 0" | 0" |
| 2005 | 69°F | 39°F | -- | 0" |
| 2004 | 65°F | 23°F | 0" | 0" |
| 2003 | 79°F | 30°F | 0" | 0" |
| 2002 | 74°F | 33°F | 0" | 0" |
| 2001 | 77°F | 35°F | 0" | 0" |
| 2000 | 66°F | 42°F | 0.03" | 0" |
| 1999 | 63°F | 46°F | 0.05" | 0" |
| 1998 | 77°F | 39°F | 0" | 0" |
| 1997 | 63°F | 37°F | 0" | 0" |
| 1996 | 73°F | 35°F | 0" | 0" |
| 1995 | 68°F | 20°F | 0" | 0" |
| 1994 | 76°F | 25°F | 0" | 0" |
| 1993 | 78°F | 42°F | 0" | 0" |
| 1992 | 77°F | 34°F | 0" | 0" |
| 1991 | 79°F | 35°F | 0" | 0" |
| 1990 | 68°F | 44°F | 0" | 0" |
| 1989 | 72°F | 32°F | 0" | 0" |
| 1988 | 68°F | 39°F | 0" | 0" |
| 1987 | 79°F | 28°F | 0" | 0" |
| 1986 | 67°F | 36°F | 0" | 0" |
| 1985 | 63°F | 25°F | 0" | 0" |
| 1984 | 72°F | 42°F | 0" | 0" |
| 1983 | 71°F | 41°F | 0" | 0" |
| 1982 | 77°F | 41°F | 0" | 0" |
| 1981 | 73°F | 40°F | 0.43" | 0" |
| 1980 | 72°F | 31°F | 0" | 0" |
| 1979 | 76°F | 32°F | 0" | 0" |
| 1978 | 74°F | 29°F | 0" | 0" |
| 1977 | 68°F | 40°F | 0" | 0" |
| 1976 | 70°F | 31°F | 0" | 0" |
| 1975 | 68°F | 26°F | 0" | 0" |
| 1974 | 69°F | 35°F | 0" | 0" |
| 1973 | 73°F | 37°F | 0.03" | 0" |
| 1972 | 70°F | 40°F | 0" | 0" |
| 1971 | 62°F | 23°F | 0" | 0" |