Weather on September 1
Denver, CO
55 Years of Data
Avg High
83°F
Avg Low
54°F
Warmest
2011
78°F avg
Coldest
1994
59°F avg
About This Date
September 1st in Denver, CO typically brings warm fall weather, with average highs around 83°F and lows near 54°F — a 29°F daily swing. Over 55 years of records, the warmest September 1st was in 2011 (78°F average), while the coldest was 1994 (59°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 1st dates historically, with the wettest September 1st recording 1.65" of rain. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for September 1st in Denver, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 49° | 65° | — | — |
| 2024 | 88° | 56° | 72° | — | — |
| 2023 | 92° | 61° | 76° | — | — |
| 2022 | 90° | 57° | 73° | — | — |
| 2021 | 92° | 61° | 76° | — | — |
| 2020 | 71° | 50° | 61° | 0.18" | — |
| 2019 | 87° | 59° | 73° | — | — |
| 2018 | 86° | 57° | 72° | 0.03" | — |
| 2017 | 82° | 58° | 70° | — | — |
| 2016 | 76° | 53° | 64° | — | — |
| 2015 | 83° | 56° | 69° | 0.2" | — |
| 2014 | 78° | 50° | 64° | — | — |
| 2013 | 78° | 61° | 69° | — | — |
| 2012 | 90° | 59° | 74° | — | — |
| 2011warmest | 92° | 64° | 78° | — | — |
| 2010 | 80° | 47° | 63° | — | — |
| 2009 | 81° | 56° | 68° | — | — |
| 2008 | 90° | 55° | 72° | 0.05" | — |
| 2007 | 92° | 56° | 74° | — | — |
| 2006 | 88° | 52° | 70° | — | — |
| 2005 | 84° | 46° | 65° | — | — |
| 2004 | 85° | 51° | 68° | — | — |
| 2003 | 78° | 46° | 62° | — | — |
| 2002 | 88° | 58° | 73° | — | — |
| 2001 | 80° | 48° | 64° | — | — |
| 2000 | 82° | 46° | 64° | — | — |
| 1999 | 90° | 51° | 70° | 1.63" | — |
| 1998 | 78° | 53° | 66° | 1.3" | — |
| 1997 | 80° | 55° | 68° | — | — |
| 1996 | 87° | 52° | 69° | — | — |
| 1995 | 92° | 55° | 73° | — | — |
| 1994coldest | 70° | 49° | 59° | 0.25" | — |
| 1993 | 71° | 52° | 61° | — | — |
| 1992 | 75° | 48° | 62° | — | — |
| 1991 | 83° | 52° | 67° | — | — |
| 1990 | 94° | 60° | 77° | 0.76" | — |
| 1989 | 90° | 57° | 73° | — | — |
| 1988 | 90° | 60° | 75° | — | — |
| 1987 | 80° | 54° | 67° | — | — |
| 1986 | 78° | 50° | 64° | — | — |
| 1985 | 91° | 61° | 76° | — | — |
| 1984 | 82° | 60° | 71° | 0.25" | — |
| 1983 | 86° | 60° | 73° | — | — |
| 1982 | 86° | 52° | 69° | — | — |
| 1981 | 81° | 48° | 64° | — | — |
| 1980 | 83° | 49° | 66° | — | — |
| 1979 | 85° | 55° | 70° | — | — |
| 1978 | 82° | 56° | 69° | — | — |
| 1977 | 78° | 56° | 67° | 0.03" | — |
| 1976 | 73° | 49° | 61° | 0.08" | — |
| 1975 | 88° | 52° | 70° | — | — |
| 1974 | 82° | 44° | 63° | — | — |
| 1973 | 79° | 56° | 67° | — | — |
| 1972 | 71° | 50° | 61° | 1.65" | — |
| 1971 | 86° | 62° | 74° | — | — |
55 years of data from LAKEWOOD