September Weather

This page is for September weather records 1878-2017.

**Last updated 2/15/2018- Under Construction

1981-2010 September Averages
High: 77.0
Low: 56.5
Mean: 66.8
Precipitation: 2.84″

Precipitation Records

Top 25 Wettest Septembers
1. 1890: 7.13″
2. 2003: 6.86″
3. 1979: 6.76″
4. 2011: 6.55″
5. 1965: 6.18″
6. 1911: 5.98″
7. 1896: 5.93″
8. 1926: 5.77″
9. 1996: 5.50″
10. 1975: 5.46″
11. 1938: 5.40″
12. 2006: 5.35″
13. 1894: 5.31″
14. 1990: 5.26″
15. 1972: 5.13″
16. 2016: 4.68″
17. 1933: 4.45″
18. 2002: 4.35″
19. 1982: 4.25″
20. 1902: 4.16″
21. 1991: 4.05″
22. 2012: 3.97″
23. 1970: 3.95″
24. 1924: 3.77″
25. 1947: 3.67″

Top 25 Driest Septembers
1. 1908: 0.42″
2. 1963: 0.51″
3. 1917: 0.55″
4. 2014: 0.65″
5. 1954: 0.74″
6. 1928: 0.80″
7. 1897: 0.82″
8. 1904, 1960: 0.83″
9. 1888: 0.91″
10. 1943: 0.95″
11. 1900: 0.97″
12. 1946: 1.02″
13. 1891, 1930, 1961: 1.05″
14. 1893: 1.14″
15. 1919, 1995: 1.15″
16. 1978: 1.16″
17. 1985: 1.18″
18. 1914: 1.26″
19. 1998: 1.27″
20. 1887, 1944: 1.35″
21. 1997: 1.36″
22. 1956: 1.37″
23. 1939: 1.39″
24. 1969: 1.40″
25. 1903: 1.46″

Top 25 Greatest September Daily Precipitation
1. 9/12/1938: 3.59″
2. 9/14/1979: 2.66″
3. 9/29/1896: 2.38″
4. 9/1/2003: 2.36″
5. 9/13/1979: 2.20″
6. 9/11/2011: 2.17″
7. 9/28/1996: 2.07″
8. 9/2/1982: 2.04″
9. 9/6/1890: 1.95″
10. 9/23/2000: 1.93″
11. 9/12/2006: 1.87″
12. 9/10/1894: 1.82″
13. 9/3/1988: 1.80″
14. 9/15/1911: 1.79″
15. 9/22/2003: 1.74″
16. 9/8/1885: 1.72″
17. 9/29/1973: 1.68″
18. 9/5/1915, 9/11/1975: 1.67″
19. 9/29/1936: 1.64″
20. 9/8/1970: 1.60″
21. 9/9/1991: 1.59″
22. 9/12/1990: 1.53″
23. 9/21/2013: 1.52″
24. 9/28/1979: 1.50″
25. 9/3/1909: 1.49″

Top 10 Septembers with the Most Precipitation Days
1. 2011: 19
2. 1899, 1910, 1924, 1933, 1958: 18
3. 1902, 1926,, 1945, 1966, 1996, 2012: 17
4. 1911, 1929, 1934, 1962, 1972, 1977, 1984: 16
5. 1890, 1893, 1975, 1981, 1991, 1993, 2003, 2006, 2009: 15
6. 1889, 1904, 1913, 1936, 1950, 1957, 1960, 1965, 1990, 2000: 14
7. 1878, 1881, 1883, 1887, 1896, 1906, 1907, 1921, 1923, 1931, 1942, 1949, 1954, 1968, 1970, 1974, 1976, 1982, 1987, 1988, 2001: 13
8. 1886, 1898, 1918, 1930, 1943, 1947, 1953, 1971, 1973, 1986, 1992, 2005, 2008: 12
9. 1880 1882, 1901, 1915, 1916, 1919, 1932, 1952, 1959, 1998, 2010, 2015, 2017: 11
10. 1884, 1894, 1900, 1909, 1912, 1920, 1935, 1938, 1944, 1948, 1956, 1961, 1964, 1997, 2002, 2013, 2016: 10

Top 5 Septembers with the Most 1″+ Precipitation Days
1. 1890, 1894, 1979: 3
2. 1896, 1934, 1938, 1965, 1976, 1982, 190, 1996, 2002, 2003, 2004, 2011, 2015: 2
3. 1884, 1885, 1886, 1898, 1902, 1907, 1909, 1910, 1911, 1913, 1915, 1918, 1924, 1925, 1926, 1935, 1936, 1941, 1947, 1955, 1959, 1967, 1970, 1972, 1973, 1977, 1980, 1986, 1988, 1989, 1991, 1999, 2000, 2006, 2007, 2013, 2016, 2017: 1
4. All the Others: 0

Top 5 Septembers with the Most 0.50″+ Precipitation Days
1. 1890, 1911, 1926, 1933, 1965, 1972, 1990, 2003, 2016: 5
2. 1894, 1962, 1975: 4
3. 1878, 1882, 1883, 1886, 1896, 1902, 1905, 1912, 1915, 1922, 1924, 1934, 1942, 1947, 1951, 1952, 1955, 1966, 1970, 1974, 1976, 1979, 1986, 1996, 2002, 2004, 2005, 2006, 2008, 2011, 2012: 3
4. 1879, 1884, 1885, 1889, 1899, 1906, 1907, 1910, 1913, 1920, 1923, 1927, 1931, 1937, 1938, 1945, 1948, 1949, 1953, 1957, 1958, 1967, 1968, 1971, 1981, 1982, 1983, 1988, 1989, 1991, 2000, 2007, 2009, 2013, 2015: 2
5. 1881, 1887, 1892, 1895, 1898, 1900, 1901, 1903, 1909, 1914, 1918, 1921, 1925, 1928, 1929, 1935, 1936, 1939, 1940, 1941, 1944, 1946, 1950, 1956, 1959, 1964, 1969, 1973, 1977, 1978, 1980, 1985, 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2010, 2017: 1

Top 5 Septembers with the Most 0.25″+ Precipitation Days
1. 2006: 9
2. 1896, 1926, 2012: 8
3. 1890, 1911, 1933, 1965, 2011: 7
4. 1902, 1923, 1924, 1949, 1957, 1962, 1966, 1972, 1974, 1975, 1977, 1990, 2002, 2016: 6
5. 1884, 1894, 1910, 1918, 1931, 1935, 1945, 1948, 1958, 1991, 1996, 2000, 2003: 5

Temperature

Cold Records

Top 25 Septembers with the Coldest Average High
1. 1918: 68.0
2. 1924: 69.8
3. 1879: 70.2
4. 1888: 71.0
5. 1975: 71.3
6. 1890: 71.7
7. 1981: 71.9
8. 1974, 2006: 72.1
9. 1928 1949: 72.2
10. 1976: 72.4
11. 1962: 72.9
12. 1967: 73.0
13. 1966: 73.3
14. 1889, 1972, 2011: 73.5
15. 1982: 73.6
16. 1880, 1896, 1984: 73.8
17. 2003: 73.9
18. 1883: 74.0
19. 1909: 74.2
20. 1885, 2000: 74.3
21. 1917, 2001: 74.4
22. 1882, 1969: 74.5
23. 1989, 1996: 74.6
24. 1916, 1950: 74.7
25. 1878: 74.8

Top 10 Coldest September Highs
1. 9/29/1967: 48
2. 9/30/1924: 49
3. 9/30/1899, 9/28/1967: 50
4. 9/19/1918, 9/21/1918, 9/30/1920, 9/24/1950, 9/25/2001: 51
5. 9/30/1895, 9/22/1913, 9/29/1924, 9/28/1964: 52
6. 9/29/1888, 9/26/1899, 9/29/1908, 9/28/1926, 9/27/1942, 9/28/1942, 9/30/1947, 9/28/1962, 9/30/1972, 9/27/1984: 53
7. 9/24/1887, 9/29/1895, 9/14/1923, 9/25/1943, 9/14/1953, 9/17/1981, 9/18/1981, 9/29/2003, 9/30/2009: 54
8. 9/30/1893, 9/21/1913, 9/29/1916, 9/29/1936, 9/28/1984, 9/25/2000: 55
9. 9/28/1888, 9/21/1889, 9/27/1890, 9/30/1896, 9/20/1899, 9/29/1899, 9/25/1907, 9/29/1912, 9/20/1918, 9/29/1928, 9/30/1966, 9/22/1974, 9/30/2011: 56
10. 9/25/1879, 9/23/1885, 9/23/1887, 9/28/1896, 9/17/1900, 9/30/1916, 9/10/1924, 9/26/1926, 9/18/1929, 9/29/1935, 9/25/1940, 9/29/1949, 9/28/1951, 9/20/1956, 9/25/1966: 57

Top 25 Septembers with the Coldest Average Low
1. 1967: 47.8
2. 1963: 49.1
3. 1949: 49.9
4. 1918, 1962: 50.0
5. 1956: 50.4
6. 1976: 50.9
7. 1888: 51.6
8. 1951: 51.8
9. 1952: 51.9
10. 1953: 52.1
11. 1964, 1974, 1984: 52.3
12. 18887: 52.4
13. 1981: 52.6
14. 1879, 1896, 1995: 52.7
15. 1928: 52.8
16. 1969: 53.0
17. 1916, 1924, 1966: 53.1
18. 1917, 1982: 53.3
19. 1994: 53.4
20. 1885, 1950: 53.6
21. 1940, 1985: 53.8
22. 1897: 53.9
23. 1883, 1909, 1937, 1975: 54.0
24. 1992: 54.1
25. 1889, 1914, 1943, 1991: 54.2

Top 10 Coldest September Lows
1. 9/21/1962, 9/30/1963: 31
2. 9/30/1888, 9/29/1961: 32
3. 9/29/1893, 9/30/1899, 9/30/1949, 9/25/1950, 9/29/1951, 9/21/1956, 9/25/1967, 9/29/1984, 9/23/1995: 33
4. 9/29/1942, 9/18/1959, 9/23/1974: 34
5. 9/30/1916, 9/26/1928, 9/24/1950, 9/26/1950, 9/23/1967, 9/24/1981, 9/29/1981, 9/24/1983: 35
6. 9/24/1887, 9/23/1896, 9/23/1913, 9/24/1928, 9/28/1942, 9/29/1962, 9/29/1963, 9/29/1969, 9/29/1970, 9/24/1989, 9/27/1991, 9/30/1992: 36
7. 9/25/1879, 9/26/1893, 9/30/1895, 9/21/1897, 9/27/1899, 9/30/1908, 9/26/1940, 9/23/1953, 9/20/1956, 9/27/1957, 9/17/1959, 9/29/1967, 9/22/1974, 9/23/1981, 9/25/1983, 9/28/1984, 9/22/1995: 37
8. 9/29/1888, 9/21/1889, 9/22/1889, 9/28/1890, 9/29/1899, 9/14/1902, 9/30/1912, 9/22/1918, 9/26/1926, 9/30/1935, 9/25/1942, 9/25/1949, 9/28/1951, 9/14/1953, 9/20/1962, 9/30/1962, 9/13/1964, 9/24/1967, 9/24/1974, 9/14/1975, 9/22/1976, 9/23/1989, 9/27/1989, 9/28/1989, 9/24/1990, 9/21/1991, 9/29/1993: 38
9. 9/9/1883, 9/23/1885, 9/24/1885, 9/28/1888, 9/20/1896, 9/24/1896, 9/22/1897, 9/26/1907, 9/29/1908, 9/11/1917, 9/14/1923, 9/25/1928, 9/27/1947, 9/29/1949, 9/8/1951, 9/30/1951, 9/24/1957, 9/28/1957, 9/23/1963, 9/14/1964, 9/28/1969, 9/30/1972, 9/25/1985, 9/26/1987, 9/29/2000, 9/30/2003, 9/30/2009, 9/24/2012: 39
10. 9/26/1879, 9/30/1880, 9/26/1887, 9/27/1889, 9/27/1893, 9/19/1901, 9/22/1904, 9/27/1909, 9/28/1909, 9/27/1912, 9/16/1916, 9/19/1916, 9/29/1916, 9/27/1918, 9/15/1923, 9/30/1928, 9/19/1929, 9/26/1943, 9/30/1947, 9/24/1952, 9/27/1952, 9/23/1954, 9/25/1956, 9/14/1960, 9/23/1979, 9/27/1980, 9/23/1983, 9/6/1984, 9/7/1988, 9/29/1992, 9/11/1993, 9/24/1995, 9/22/1999, 9/23/2012: 40

Top 25 Septembers with the Coldest Mean
1. 1918: 59.0
2. 1967: 60.4
3. 1949: 61.1
4. 1888: 61.3
5. 1962: 61.4
6. 1879, 1924: 61.5
7. 1976: 61.7
8. 1974, 1981: 62.2
9. 1928: 62.5
10. 1975: 62.7
11. 1890, 1984: 63.1
12. 1966: 63.2
13. 1896: 63.3
14. 1956: 63.4
15. 1982: 63.5
16. 1963, 1969: 63.7
17. 1889, 1916, 1917: 63.9
18. 1883, 1885: 64.0
19. 1887, 1909, 1995: 64.1
20. 1950: 64.2
21. 1951, 2001, 2003: 64.4
22. 1972: 64.6
23. 1943, 1992: 64.7
24. 1914, 1940, 2000: 64.8
25. 1993: 64.9

Heat Records

Top 25 Septembers with the Warmest Average High
1. 1939: 84.4
2. 1881, 1897: 83.7
3. 1998: 83.6
4. 1908: 83.5
5. 2007: 82.6
6. 1961: 82.5
7. 1959: 82.3
8. 1954: 82.2
9. 1895: 82.1
10. 1900, 1941, 2002: 81.9
11. 1955: 81.7
12. 1936: 81.2
13. 1925: 81.1
14. 1931, 1978: 80.9
15. 1891: 80.8
16. 1884, 1898, 1922, 2016: 80.6
17. 2005, 2008: 80.5
18. 1927: 80.4
19. 1953, 1999: 80.2
20. 1960, 1970, 2015: 80.1
21. 2010: 80.0
22. 1921: 79.8
23. 1973: 79.7
24. 1903, 1948: 79.6
25. 1906, 1952, 1983: 79.5

Top 10 Warmest September Highs
1. 9/2/1953: 100
2. 9/1/1932, 9/1/1953, 9/3/1953, 9/5/1954, 9/6/1954: 99
3. 9/6/1881, 8/5/1899, 9/7/1939, 9/8/1939, 9/14/1939: 98
4. 9/5/1881, 9/19/1895, 9/20/1895, 9/14/1897, 9/15/1897, 9/7/1899, 9/15/1939, 9/6/1998, 9/2/2011, 9/3/2011: 97
5. 9/7/1881, 9/11/1895, 9/21/1895, 9/10/1897, 9/12/1897, 9/16/1897, 9/3/1899, 9/16/1939, 9/4/1953, 9/29/1953, 9/8/1959, 9/10/1964, 9/10/1983, 9/14/1998: 96
6. 9/18/1895, 9/22/1895, 9/8/1897, 9/9/1897, 9/13/1897, 9/3/1898, 9/3/1925, 9/15/1936, 9/9/1939, 9/13/1939, 9/1/1943, 9/18/1955, 9/1/1957, 9/8/2002, 9/10/2013: 95
7. 9/7/1893, 9/12/1895, 9/11/1896, 9/11/1897, 9/1/1898, 9/9/1900, 9/10/1900, 9/10/1912, 9/2/1913, 9/3/1913, 9/9/1925, 9/14/1936, 9/20/1940, 9/7/1945, 9/9/1955, 9/16/1955, 9/17/1955, 9/19/1955, 9/9/1959, 9/8/1964, 9/9/1964, 9/3/2002, 9/7/2002, 9/9/2002, 9/10/2002, 9/2/2010: 94
8. 9/8/1881, 9/10/1881, 9/13/1887, 9/9/1895, 9/10/1895, 9/2/1898, 9/6/1900, 9/11/1900, 9/25/1900, 9/11/1908, 9/12/1908, 9/20/1908, 9/6/1913, 9/7/1922, 9/4/1925, 9/11/1925, 9/14/1927, 9/15/1927, 9/9/1933, 9/3/1939, 9/8/1946, 9/11/1952, 9/12/1952, 9/13/1952, 9/2/1957, 9/5/1959, 9/7/1959, 9/1/1960, 9/4/1960, 9/8/1960, 9/4/1964, 9/2/1973, 9/2/1984, 9/6/1990, 9/16/1991, 9/5/2007, 9/6/2007, 9/3/2008, 9/7/2010, 9/23/2010, 9/1/2011: 93
9. 9/7/1884, 9/8/1884, 9/21/1891, 9/2/1894, 9/3/1894, 9/7/1894, 9/10/1896, 9/12/1896, 9/2/1899, 9/1/1900, 9/8/1903, 9/14/1903, 9/15/1903, 9/21/1908, 9/24/1908, 9/2/1912, 9/21/1914, 9/9/1919, 9/6/1922, 9/8/1922, 9/5/1925, 9/10/1931, 9/11/1931, 9/12/1931, 9/17/1931, 9/7/1933, 9/8/1933, 9/11/1936, 9/13/1936, 9/21/1940, 9/9/1941, 9/14/1942, 9/6/1945, 9/8/1945, 9/19/1948, 9/1/1952, 9/30/1953, 9/4/1958, 9/6/1959, 9/28/1959, 9/24/1961, 9/7/1964, 9/3/1973, 9/4/1973, 9/20/1978, 9/8/1985, 9/5/1990, 9/13/1991, 9/15/1991, 9/26/1998, 9/3/1999, 9/24/2007, 9/4/2008, 9/1/2010, 9/24/2010, 9/26/2017, 9/27/2017: 92
10. 9/5/1884, 9/1/1889, 9/20/1891, 9/25/1891, 9/6/1893, 9/9/1894, 9/1/1897, 9/7/1897, 9/13/1903, 9/19/1908, 9/1/1912, 9/6/1912, 9/1/1913, 9/5/1913, 9/5/1922, 9/9/1922, 9/6/1925, 9/3/1929, 9/21/1931, 9/18/1935, 9/16/1936, 9/2/1937, 9/3/1937, 9/4/1937, 9/4/1938, 9/2/1939, 9/15/1955, 9/7/1960, 9/5/1961, 9/11/1961, 9/12/1961, 9/13/1961, 9/3/1966, 9/21/1970, 9/1/1973, 9/21/1978, 9/11/1983, 9/7/1985, 9/2/1993, 9/12/1998, 9/13/1998, 9/4/1999, 9/12/1999, 9/7/2007, 9/25/2007, 9/2/2008, 9/21/2010, 9/22/2010, 9/6/2012, 9/9/2013, 9/5/2014, 9/23/2017, 9/24/2017, 9/25/2017: 91

Top 25 Septembers with the Warmest Average Low
1. 1881: 65.5
2. 1925: 62.5
3. 1931: 61.9
4. 1921: 61.5
5. 1933: 61.4
6. 1884: 61.3
7. 1945: 60.8
8. 1900, 1939: 60.5
9. 2016: 60.3
10. 1927: 60.2
11. 1895: 60.1
12. 1911: 59.9
13. 2008: 59.7
14. 1998: 59.6
15. 2002: 59.5
16. 1930, 1961, 2005, 2007: 59.4
17. 1941: 59.2
18. 1898: 59.1
19. 1894, 1926, 1934, 1965, 1977, 2015: 59.0
20. 1971, 1986: 58.9
21. 1922: 58.7
22. 1915, 1978: 58.6
23. 1947: 58.4
24. 1923: 58.3
25. 1910: 58.2

Top 10 Warmest Daily September Highs
1. 9/1/1880, 9/2/1880, 9/6/1899, 9/10/2013: 75
2. 9/4/1880, 9/9/1881, 9/19/1895, 9/21/1895, 9/14/1927, 9/22/1931, 9/13/1936, 9/1/1937, 9/2/1937, 9/15/1939, 9/4/1943, 9/15/1998, 9/1/2012, 9/11/2013: 74
3. 9/3/1880, 9/6/1881, 9/7/1881, 9/2/1898, 9/3/1898, 9/9/1919, 9/1/1932, 9/14/1936, 9/15/1936, 9/14/1939, 9/9/1941, 9/7/1945, 9/8/1945, 9/6/1985, 9/1/2014, 9/5/2014: 73
4. 9/10/1884, 9/15/1893, 9/8/1894, 9/9/1894, 9/4/1898, 9/7/1913, 9/10/1925, 9/15/1927, 9/15/1931, 9/16/1931, 9/12/1936, 9/18/1942, 9/5/1961, 9/21/1965, 9/22/1965, 9/1/1980, 9/6/1983, 9/6/1990, 9/14/2002, 9/2/2011, 9/3/2011, 9/2/2012, 9/4/2012, 9/8/2016: 72
5. 9/10/1881, 9/25/1881, 9/4/1884, 9/9/1884, 9/19/1893, 9/7/1899, 9/9/1900, 9/11/1900, 9/1/1912, 9/2/1912, 9/13/1915, 9/14/1915, 9/10/1919, 9/3/1921, 9/8/1922, 9/12/1925, 9/20/1925, 9/4/1926, 9/12/1931, 9/21/1931, 9/4/1933, 9/9/1933, 9/8/1939, 9/13/1939, 9/3/1941, 9/4/1941, 9/5/1943, 9/10/1947, 9/1/1961, 9/2/1961, 9/3/1961, 9/1/1962, 9/22/1970, 9/24/1970, 9/18/1978, 9/20/1978, 9/5/1983, 9/30/1986, 9/10/1991, 9/14/1993, 9/2/2000, 9/7/2007, 9/12/2008, 9/3/2012, 9/1/2013, 9/9/2016: 71
6. 9/8/1878, 9/1/1879, 9/5/1880, 9/6/1880, 9/2/1881, 9/4/1881, 9/8/1881, 9/30/1881, 9/8/1884, 9/5/1894, 9/7/1894, 9/11/1895, 9/1/1898, 9/1/1899, 9/3/1900, 9/8/1903, 9/3/1912, 9/6/1912, 9/3/1913, 9/15/1915, 9/1/1921, 9/2/1921, 9/4/1921, 9/9/1922, 9/1/1924, 9/3/1925, 9/24/1926 : 70
7. 9/2/1879, 9/3/1881, 9/5/1881, 9/26/1881, 9/28/1881, 9/2/1882, 9/18/1882, 9/5/1884, 9/6/1884, 9/7/1884, 9/7/1890, 9/8/1890, 9/4/1894, 9/10/1895, 9/20/1895, 9/22/1895, 9/12/1896, 9/16/1897, 9/5/1898, 9/6/1898, 9/3/1899, 9/7/1900, 9/20/1906, 9/20/1907, 9/10/1912, 9/1/1914, 9/11/1915, 9/16/1915, 9/3/1922, 9/7/1925, 9/11/1925, 9/5/1926, 9/16/1927 : 69
8. 9/1/1878, 9/7/1878, 9/9/1878, 9/1/1881, 9/23/1881, 9/27/1881, 9/1/1882, 9/26/1886, 9/27/1886, 9/3/1889, 9/4/1889, 9/5/1890, 9/26/1895, 9/15/1897, 9/2/1900, 9/10/1900, 9/26/1900, 9/12/1903, 9/16/1903, 9/2/1904, 9/18/1905, 9/19/1906, 9/21/1906, 9/3/1910, 9/5/1910, 9/6/1910, 9/11/1911, 9/5/1912, 9/14/1912, 9/2/1913, 9/6/1913, 9/22/1914, 9/9/1915, 9/26/1920, 9/9/1921, 9/11/1921, 9/4/1922, 9/6/1922, 9/10/1922, 9/2/1923, 9/3/1923, 9/5/1923, 9/6/1923, 9/6/1925, 9/9/1925, 9/19/1925, 9/2/1926, 9/23/1926, 9/8/1927, 9/17/1927, 9/30/1927, 9/15/1928, 9/4/1929, 9/6/1929, 9/9/1929, 9/27/1929 : 68
9. 9/15/1881, 9/29/1881, 9/19/1882, 9/3/1884, 9/11/1884, 9/27/1884, 9/13/1885, 9/16/1886, 9/2/1889, 9/14/1894, 9/15/1894, 9/4/1895, 9/18/1895, 9/11/1896, 9/14/1897, 9/2/1899, 9/6/1900, 9/1/1902, 9/9/1903, 9/15/1903, 9/1/1904, 9/29/1904, 9/10/1906, 9/12/1906, 9/17/1907, 9/20/1908, 9/14/1909, 9/22/1909, 9/4/1910, 9/9/1911, 9/10/1911, 9/16/1911, 9/4/1912, 9/15/1912, 9/12/1915, 9/17/1915, 9/5/1917, 9/7/1917, 9/2/1918, 9/24/1920, 9/5/1921, 9/17/1921, 9/7/1922, 9/1/1923, 9/21/1924, 9/1/1925, 9/4/1925, 9/15/1926, 9/16/1926, 9/11/1927, 9/13/1927, 9/13/1928, 9/5/1929, 9/7/1929 : 67
10. 9/22/1881, 9/24/1881, 9/27/1884, 9/29/1884, 9/5/1889, 9/6/1890, 9/10/1892, 9/11/1893, 9/22/1893, 9/6/1894, 9/10/1894, 9/7/1895, 9/13/1896, 9/1/1900, 9/12/1900, 9/25/1900, 9/14/1903, 9/9/1906, 9/11/1906, 9/19/1907, 9/12/1908, 9/13/1909, 9/8/1910, 9/5/1911, 9/8/1911, 9/7/1912, 9/1/1913, 9/4/1915, 9/10/1915, 9/6/1917, 9/3/1919, 9/25/1920, 9/5/1922, 9/4/1923, 9/7/1923, 9/20/1924, 9/13/1925, 9/3/1926, 9/9/1927, 9/10/1927, 9/11/1928, 9/14/1928, 9/8/1929, : 66

Top 25 Septembers with the Warmest Mean
1. 1881: 74.6
2. 1939: 72.4
3. 1925: 71.8
4. 1998: 71.6
5. 1931: 71.4
6. 1900: 71.2
7. 1895: 71.1
8. 1884, 2007: 71.0
9. 1961: 70.9
10. 1936: 70.8
11. 1921, 2002: 70.7
12. 1941: 70.5
13. 1908, 1933, 2016: 70.4
14. 1927: 70.3
15. 2008: 70.1
16. 1945, 2005: 70.0
17. 1898, 1906: 69.9
18. 1978: 69.8
19. 1922: 69.7
20. 1959, 2015: 69.6
21. 1891: 69.3
22. 1894, 1955, 1986: 69.1
23. 1954: 69.0
24. 1930, 1973: 68.9
25. 1897, 1911, 1970: 68.8