WFO Denver/Boulder

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


10 WARMEST SEPS           10 WETTEST SEPS           10 SNOWIEST SEPS
  (1873-2014)               (1872-2014)               (1882-2014)

 68.3   1948               5.61   2013               17.2   1971
 68.2   1931, 1981         4.67   1961               16.5   1936
 68.0   1998 (cor)         3.78   1909               12.9   1959
 67.7   1933               3.70   1902               11.4   1895
 67.6   1947               3.42   1938                8.7   1985
 67.2   1994, 2005         2.95   2012                7.4   1995
 67.0   1939, 2010         2.89   1975, 1918, 1936    6.5   1908
 66.9   1990               2.85   1971, 1973          5.8   1961
 66.8   2001               2.72   1906, 1955          5.5   1965
 66.6   1977               2.64   1913                5.4   1993
                           2.58   1965

10 COLDEST SEPS           10 DRIEST SEPS            LEAST SNOWIEST SEPS
  (1873-2014)               (1872-2014)                 (1882-2014)

 54.8   1912                 T    1892, 1944          Numerous years with
 55.7   1965               0.01   1956, 1992          no snowfall (85).
 56.3   1961               0.02   1879, 1921
 57.5   1971               0.05   1893
 58.1   1918               0.06   1882, 1920, 2010
 58.8   1929, 1985         0.07   1928, 1978, 2005
 58.9   2006               0.08   1949
 59.2   1913, 1999         0.10   1977
 59.3   2003               0.11   1888, 1932
 59.4   1974               0.13   1884, 1983


- 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: 9/26/2014 - WFO BOU

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