Heavy to excessive rainfall may produce areas of flooding Friday and Friday night from central Texas into the lower Mississippi Valley. Scattered strong to severe thunderstorms are expected from central Texas to middle Tennessee and central Kentucky Friday afternoon into early Friday night. Large hail and damaging winds are the main threats. Read More >
National Weather Service - Denver, Colorado
Temperture Normals And Extreme For September
|Normal|Record| Year |Record| Year ||Normal|Record| Year |Record| Year |
Date | High | High | Set |Warmest Set || Low | Low | Set |Coldest Set |
| | | |Minimum || | | |Maximum |
-----|------|------|------|------|------||------|------|------|------|------|
1 | 84 | 98 | 2019 | 68 | 2011 || 54 | 44 | 1962 | 57 | 1972 |
2 | 84 | 100 | 2019 | 67 | 1939 || 54 | 40 | 1952 | 52 | 1974 |
3 | 83 | 97 | 2017 | 68 | 2013 || 53 | 33 | 1961 | 46 | 1961 |
4 | 83 | 97 | 1995^| 69 | 2013 || 53 | 40 | 1968^| 52 | 1929 |
5 | 83 | 101#| 2020 | 66 | 2019^|| 53 | 38 | 1962 | 51 | 1918 |
6 | 82 | 97 | 2020^| 67 | 2020 || 52 | 34 | 1929 | 45 | 1929 |
7 | 82 | 95 | 2013^| 63 | 1938^|| 52 | 34 | 1929 | 41 | 1929 |
8 | 82 | 94 | 1959 | 64 | 1940^|| 51 | 31 | 2020^| 42 | 1929 |
9 | 81 | 94 | 1994^| 63 | 1994^|| 51 | 31 | 2020^| 42 | 2020 |
10 | 81 | 93 | 2018^| 66 | 2005 || 51 | 35 | 2020^| 42 | 1898 |
11 | 81 | 93 | 2018 | 65 | 1939^|| 50 | 32 | 1898 | 41 | 1989 |
12 | 80 | 94 | 1911 | 64 | 1939^|| 50 | 31 | 1902 | 40 | 1989 |
13 | 80 | 96 | 2018^| 64 | 2018 || 49 | 33 | 1993 | 49 | 1961 |
14 | 79 | 92 | 2018^| 63 | 1895^|| 49 | 29 | 2003 | 43 | 1912 |
15 | 79 | 94 | 2018 | 61 | 1992^|| 49 | 32 | 1912^| 47 | 1903 |
16 | 79 | 95 | 2000 | 63 | 1926 || 48 | 30 | 1965 | 48 | 1971^|
17 | 78 | 95 | 2000 | 64 | 2018 || 48 | 30 | 1965 | 35 | 1971 |
18 | 78 | 93 | 1895 | 69 | 1947 || 47 | 23 | 1971 | 40 | 1971 |
19 | 77 | 96 | 2010 | 62 | 1947 || 47 | 20 | 1971 | 46 | 1965 |
20 | 77 | 94 | 2010 | 65 | 1941 || 47 | 28 | 1983 | 45 | 1965 |
21 | 76 | 92 | 2017 | 60 | 1926 || 46 | 27 | 1995 | 36 | 1995 |
22 | 76 | 89 | 1953 | 62 | 1884 || 46 | 27 | 1895 | 45 | 1941 |
23 | 75 | 90 | 1905^| 63 | 1934 || 45 | 29 | 1895 | 43 | 1965 |
24 | 75 | 91 | 2020 | 59 | 1949 || 45 | 29 | 2000^| 40 | 1913 |
25 | 75 | 91 | 1998 | 61 | 2020 || 44 | 25 | 1926 | 45 | 1934 |
26 | 74 | 90 | 2010^| 60 | 1948 || 44 | 28 | 1927 | 34 | 1927 |
27 | 74 | 92 | 1953 | 59 | 2001 || 44 | 21 | 1908 | 35 | 1936 |
28 | 73 | 92 | 2010 | 59 | 1931 || 43 | 21 | 1985 | 34 | 1984 |
29 | 73 | 92 | 1892 | 61 | 1981 || 43 | 17* | 1985 | 29 | 1985 |
30 | 72 | 90 | 1980 | 62 | 1891 || 42 | 25 | 1985 | 36 | 1959 |
The Normal High and Low Temperatures are calculated from 1981-2010 data.
The Temperature Extremes range from 1872-2020.
^ - Also in previous years.
# - Highest Temperature of the Month: 101 degrees on 9/5/2020
* - Lowest Temperature of the Month: 17 degrees on 9/29/1985.
- The September Mean Temperature is 62.4 degrees (from 1981-2010 DIA data).
- Data collected at the Downtown City Office from 1872-December 1949, then
at the Stapleton Airport Office from January 1950-February 1995, then at
Denver International Airport from March 1995-Present.
UPDATED: 9/9/2020
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