Weather on September 30
Denver, CO
55 Years of Data
Avg High
77°F
Avg Low
43°F
Warmest
2024
74°F avg
Coldest
1985
31°F avg
About This Date
September 30th in Denver, CO typically brings pleasant fall weather, with average highs around 77°F and lows near 43°F — a 34°F daily swing. Over 55 years of records, the warmest September 30th was in 2024 (74°F average), while the coldest was 1985 (31°F) — a 43°F range across recorded history. Rain or other precipitation has occurred on about 18% of September 30th dates historically, with the wettest September 30th recording 2.26" of rain. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for September 30th in Denver, CO? Great weather for outdoor activities.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 45° | 64° | 0.03" | — |
| 2024warmest | 95° | 54° | 74° | — | — |
| 2023 | 84° | 45° | 64° | — | — |
| 2022 | 86° | 49° | 67° | — | — |
| 2021 | 76° | 44° | 60° | 0.46" | — |
| 2020 | 79° | 46° | 62° | — | — |
| 2019 | 88° | 49° | 68° | — | — |
| 2018 | 85° | 39° | 62° | — | — |
| 2017 | 66° | 42° | 54° | 0.03" | — |
| 2016 | 84° | 52° | 68° | — | — |
| 2015 | 81° | 54° | 67° | — | — |
| 2014 | 66° | 47° | 56° | 2.26" | — |
| 2013 | 80° | 42° | 61° | — | — |
| 2012 | 79° | 46° | 62° | — | — |
| 2011 | 76° | 44° | 60° | — | — |
| 2010 | 83° | 45° | 64° | — | — |
| 2009 | 87° | 46° | 67° | — | — |
| 2008 | 85° | 44° | 64° | — | — |
| 2007 | 78° | 47° | 62° | — | — |
| 2006 | 88° | 43° | 65° | — | — |
| 2005 | 76° | 39° | 57° | — | — |
| 2004 | 77° | 43° | 60° | 0.08" | — |
| 2003 | 71° | 37° | 54° | — | — |
| 2002 | 81° | 48° | 64° | — | — |
| 2001 | 79° | 48° | 63° | — | — |
| 2000 | 82° | 54° | 68° | — | — |
| 1999 | 69° | 26° | 48° | — | — |
| 1998 | 72° | 32° | 52° | — | — |
| 1997 | 84° | 46° | 65° | — | — |
| 1996 | 83° | 46° | 64° | — | — |
| 1995 | 66° | 45° | 55° | 0.56" | — |
| 1994 | 77° | 54° | 65° | 0.13" | — |
| 1993 | 84° | 47° | 65° | — | — |
| 1992 | 84° | 47° | 65° | — | — |
| 1991 | 58° | 48° | 53° | 0.71" | — |
| 1990 | 73° | 43° | 58° | — | — |
| 1989 | 87° | 49° | 68° | — | — |
| 1988 | 70° | 32° | 51° | — | — |
| 1987 | 75° | 35° | 55° | — | — |
| 1986 | 65° | 35° | 50° | — | — |
| 1985coldest | 41° | 21° | 31° | — | — |
| 1984 | 70° | 32° | 51° | — | — |
| 1983 | 83° | 49° | 66° | — | — |
| 1982 | 66° | 39° | 53° | — | — |
| 1981 | 71° | 49° | 60° | — | — |
| 1980 | 91° | 44° | 68° | — | — |
| 1979 | 86° | 42° | 64° | — | — |
| 1978 | 80° | 36° | 58° | — | — |
| 1977 | 75° | 47° | 61° | — | — |
| 1976 | 82° | 41° | 62° | — | — |
| 1975 | 65° | 40° | 52° | 0.38" | — |
| 1974 | 76° | 32° | 54° | — | — |
| 1973 | 75° | 40° | 57° | — | — |
| 1972 | 81° | 44° | 62° | — | — |
| 1971 | 78° | 51° | 65° | 0.1" | — |
55 years of data from NORTHGLENN