Tropical system in the Gulf expected to gradually strengthen the next couple of days off the Florida Panhandle and Alabama coasts. Instances of flash flooding will be possible through Thursday along the eastern and central Gulf Coast. Severe thunderstorms will develop and move along a cold front crossing the Upper Midwest, and through the Ohio Valley/Mid-Atlantic on Tuesday. 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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