Weather on September 23
Denver, CO
55 Years of Data
Avg High
75°F
Avg Low
44°F
Warmest
2008
70°F avg
Coldest
2000
36°F avg
About This Date
September 23rd in Denver, CO typically brings pleasant fall weather, with average highs around 75°F and lows near 44°F — a 31°F daily swing. Over 55 years of records, the warmest September 23rd was in 2008 (70°F average), while the coldest was 2000 (36°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 23rd dates historically, with the wettest September 23rd recording 2.29" of rain. The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.
Planning for September 23rd in Denver, CO? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 49° | 64° | 0.91" | — |
| 2024 | 65° | 42° | 53° | 0.18" | — |
| 2023 | 83° | 47° | 65° | — | — |
| 2022 | 64° | 46° | 55° | 0.03" | — |
| 2021 | 81° | 40° | 60° | — | — |
| 2020 | 85° | 54° | 69° | — | — |
| 2019 | 77° | 44° | 61° | 0.03" | — |
| 2018 | 88° | 47° | 67° | — | — |
| 2017 | 77° | 45° | 61° | 0.05" | — |
| 2016 | 76° | 51° | 63° | — | — |
| 2015 | 78° | 53° | 66° | — | — |
| 2014 | 81° | 56° | 68° | — | — |
| 2013 | 83° | 49° | 66° | 2.29" | — |
| 2012 | 81° | 45° | 63° | — | — |
| 2011 | 87° | 49° | 68° | — | — |
| 2010 | 73° | 53° | 63° | 0.13" | — |
| 2009 | 54° | 43° | 48° | 0.08" | — |
| 2008warmest | 86° | 53° | 70° | — | — |
| 2007 | 88° | 51° | 69° | — | — |
| 2006 | 65° | 32° | 48° | 0.1" | — |
| 2005 | 68° | 44° | 56° | — | — |
| 2004 | 61° | 37° | 49° | 0.05" | — |
| 2003 | 84° | 47° | 65° | — | — |
| 2002 | 84° | 40° | 62° | — | — |
| 2001 | 77° | 44° | 61° | — | — |
| 2000coldest | 39° | 32° | 36° | — | — |
| 1999 | 82° | 48° | 65° | — | — |
| 1998 | 77° | 48° | 63° | 0.13" | — |
| 1997 | 54° | 46° | 50° | 0.25" | — |
| 1996 | 61° | 44° | 52° | — | — |
| 1995 | 58° | 26° | 42° | — | — |
| 1994 | 77° | 41° | 59° | — | — |
| 1993 | 63° | 49° | 56° | — | — |
| 1992 | 87° | 50° | 69° | — | — |
| 1991 | 74° | 33° | 53° | — | — |
| 1990 | 77° | 43° | 60° | — | — |
| 1989 | 70° | 39° | 54° | — | — |
| 1988 | 73° | 38° | 55° | — | — |
| 1987 | 81° | 39° | 60° | — | — |
| 1986 | 71° | 51° | 61° | — | — |
| 1985 | 56° | 30° | 43° | — | — |
| 1984 | 85° | 44° | 64° | — | — |
| 1983 | 84° | 34° | 59° | — | — |
| 1982 | 79° | 48° | 63° | — | — |
| 1981 | 86° | 48° | 67° | — | — |
| 1980 | 76° | 36° | 56° | — | — |
| 1979 | 88° | 49° | 68° | — | — |
| 1978 | 85° | 43° | 64° | — | — |
| 1977 | 76° | 50° | 63° | — | — |
| 1976 | 77° | 43° | 60° | — | — |
| 1975 | 73° | 37° | 55° | — | — |
| 1974 | 81° | 38° | 59° | — | — |
| 1973 | 85° | 44° | 64° | — | — |
| 1972 | 79° | 51° | 65° | — | — |
| 1971 | 69° | 35° | 52° | — | — |
55 years of data from NORTHGLENN