NWS Boulder Denver Top 20 Records - September

                NATIONAL WEATHER SERVICE - DENVER, COLORADO
            MONTHLY TEMPERATURE, RAINFALL, AND SNOWFALL EXTREMES
                              FOR SEPTEMBER


20 WARMEST SEPT            20 WETTEST SEPT            20 SNOWIEST SEPT
  (1873-2019)                (1872-2019)               (1882-2019)

 1  69.4  2015              1  5.61  2013              1  17.2  1971
 2  69.3  2019              2  4.67  1961              2  16.5  1936
    68.3  1948              3  3.78  1909              3  12.9  1959
 4  68.2  1981              4  3.70  1902              4  11.4  1895
    68.2  1931              5  3.42  1938              5   8.7  1985
 6  67.0  1998              6  2.95  2012              6   7.4  1995
 7  67.8  2018              7  2.89  1936              7   6.5  1908
 8  67.7  1933                 2.89  1918              8   5.8  1961
 9  67.6  1947                 2.89  1875              9   5.5  1965
10  67.2  2005             10  2.85  1973             10   5.4  1993
    67.2  1994                 2.85  1971             11   5.2  1984
12  67.0  2010             12  2.72  1955             12   4.7  1996
13  66.0  1993                 2.72  1906             13   4.6  1970
14  66.9  1990             14  2.64  1913             14   4.2  1951
15  66.8  2001             15  2.58  1965             15   4.0  1913
16  66.6  1977             16  2.47  1970             16   3.1  1999
17  66.4  2013                 2.47  1940             17   2.8  1935
18  66.3  2012             18  2.34  1996             18   2.3  1989
    66.3  1979             19  2.33  1985             19   1.8  1974
    66.3  1897             20  2.29  1993             20   1.7  1927
    

20 COLDEST SEPT             20 DRIEST SEPT             LEAST SNOWIEST SEPT
  (1873-2019)                (1872-2019)                 (1882-2019)

 1  54.7  1912              1     T  1944             Numerous Years
 2  55.6  1965                    T  1892                 with No
 3  56.3  1961              3  0.01  1992             Snowfall (90)
 4  57.5  1971                 0.01  1956          
 5  58.1  1918              5  0.02  1921
 6  58.8  1985                 0.02  1879
 7  58.9  2006              7  0.05  1893
    58.9  1929              8  0.06  2010
 9  59.2  1999                 0.06  1920
10  59.3  2003                 0.06  1882    
    59.3  1913             11  0.07  2005   
12  59.4  1974                 0.07  1978
13  59.5  1975                 0.07  1928
    59.5  1970             14  0.08  1949
15  59.9  1973             15  0.10  1977
    59.9  1889             16  0.11  2015
17  60.3  1872                 0.11  1932
18  60.4  1886                 0.11  1888
    60.4  1881             19  0.13  1983
20  60.5  1950                 0.13  1884
    60.5  1924


- Temperatures in degrees Fahrenheit.

- Precipitation and Snowfall amounts in inches.

- Average September Temperature is 63.4 degrees (from 1981-2010 DIA data).

- Average September Precipitation is 0.96 inches (from 1981-2010 DIA data).

- Average September Snowfall is 1.3 inches (from 1981-2010 DEN 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: 10/5/2019