Denver Monthly Temperature, Rainfall and Snowfall Extremes for September

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Denver's MONTHLY TEMPERATURE, RAINFALL, AND SNOWFALL EXTREMES FOR SEPTEMBER

Top 20 Warmest September's			Top 20 Wettest September's			Top 20 Snowiest September's
(1872-Present)			(1872-Present)			(1882-Present)
Rank	Avg	Year	Rank	Total	Year	Rank	Total	Year
1	69.4	2015	1	5.61	2013	1	17.2	1971
2	69.3	2019	2	4.67	1961	2	16.5	1936
3	69.0	2022	3	3.78	1909	3	12.9	1959
4	68.8	2021	4	3.70	1902	4	11.4	1895
5	68.3	1948	5	3.42	1938	5	8.7	1985
6	68.2	1981	6	2.95	2012	6	7.4	1995
	68.2	1931	7	2.89	1936	7	6.5	1908
8	68.0	1998		2.89	1918	8	5.8	1961
9	67.8	2018		2.89	1875	9	5.5	1965
10	67.7	1933	10	2.85	1973	10	5.4	1993
11	67.6	1947		2.85	1971	11	5.2	1984
12	67.2	2005	12	2.72	1955	12	4.7	1996
	67.2	1994		2.72	1906	13	4.6	1970
14	67.0	2010	14	2.64	1913	14	4.2	1951
	67.0	1939	15	2.58	1965	15	4.0	1913
16	66.9	1990	16	2.47	1970	16	3.1	1999
17	66.8	2001		2.47	1940	17	2.8	1935
18	66.6	1977	18	2.34	1996	18	2.3	1989
19	66.4	2013	19	2.33	1985	19	1.8	1974
20	66.3	2012	20	2.29	1993	20	1.7	1927
	66.3	1979
	66.3	1897

Top 20 Coldest September's			Top 20 Driest September's			Top 20 Least Snowiest September's
(1872-Present)			(1872-Present)			(1882-Present)
Rank	Avg	Year	Rank	Total	Year	Rank	Total	Year
1	54.7	1912	1	T	1944	Numerous Years with
2	55.6	1965		T	1892	No Snowfall
3	56.3	1961	3	0.01	1992
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 64.8 degrees (from 1991-2020 DIA data).
- Average September Precipitation is 1.35 inches (from 1991-2020 DIA data).

- Average September Snowfall is 1.0 inches (from 1882-2020 Historical Record).
- Average September Snowfall is 0.8 inches (from 1991-2020 Stapleton data).

- Official Snowfall Observations, for DIA, didn't start until the 2007-2008 snow season, so no
30 Year Average is available.

- 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: 1/9/2022