Historic Record of Early Season Cold

With temperatures predicted to fall to near freezing for the first time this week for the fall season, I thought it might be interesting to take a look at the incidence of early-season cold, and the average on when it tends to arrive.

Here are the earliest dates on record for the following:

Temperatures Below 40 and Temperature Range of Observed Dates
1. 8/29/1965: 39
2. 9/8/1951: 39
3. 9/9/1883: 39
4. 9/13/1964: 38
5. 9/14/1902, 9/14/1923, 9/14/1953, 19/14/1975: 38-39
6. 9/17/1959: 37
7. 9/20/1896, 9/20/1956, 9/20/1962: 37-39
8. 9/21/1889, 9/21/1897, 9/21/1991: 37-38
9. 9/22/1918, 9/22/1974, 9/22/1976, 9/22/1995: 37-38
10. 9/23/1885, 9/23/1913, 9/23/1963, 9/23/1967, 9/23/1981, 9/23/1989: 35-39

Average Date of First Under-40 Temp By Decade (1878-2014)
2010s: October 11th
2000s: October 8th
1990s: October 2nd
1980s: September 30th
1970s: October 1st
1960s: September 25th
1950s: September 25th
1940s: September 30th
1930s: October 11th
1920s: October 2nd
1910s: October 9th
1900s: October 5th
1890s: October 1st
1880s: October 2nd
1870s: October 1st

Highs Below 32
1. 10/30/1917: 32
2. 11/3/1951, 11/3/1966: 28-29
3. 11/4/1991: 27
4. 11/6/1967: 31
5. 11/7/1971: 31
6. 11/8/1976: 32
7. 11/10/1913: 27
8. 11/12/1920, 11/12/1921, 11/12/1932: 30-32
9. 11/13/1911, 11/13/1919, 11/13/1986, 11/13/1996: 25-32
10. 11/15/1880, 11/15/1893, 11/15/1916, 11/15/1933, 11/15/1940, 11/15/1969: 24-32

Average Date of First 32 or Below High By Decade
2010s: December 4th
2000s: December 2nd
1990s: December 7th
1980s: November 28th
1970s: November 29th
1960s: November 23rd
1950s: November 26th
1940s: December 2nd
1930s: November 27th
1920s: November 28th
1910s: November 22nd
1900s: November 30th
1890s: November 25th
1880s: November 30th
1870s: December 4th

Lows Below 32
1. 9/21/1962: 31
2. 9/29/1961: 32
3. 9/30/1888, 9/30/163: 31-32
4. 10/1/1899: 30
5. 10/2/1886, 10/2/1908, 10/2/1974: 31-32
6. 10/3/1975, 10/3/1981, 10/3/2003: 32
7. 10/4/1952, 10/4/1987: 29-32
8. 10/5/1965, 10/5/1968: 31-32
9. 10/6/1892, 10/6/1964, 10/6/1980, 10/6/1988: 30-31
10. 10/7/1889, 10/7/1935: 30-31

Average Date of First 32 or Below Low By Decade
2010s: October 24th
2000s: October 26th
1990s: October 22nd
1980s: October 17th
1970s: October 17th
1960s: October 8th
1950s: October 22nd
1940s: November 3rd
1930s: October 24th
1920s: October 28th
1910s: October 31st
1900s: October 24th
1890s: October 20th
1880s: October 20th
1870s: October 26th

July Temperature Records 1878-2012

Top 20 Coldest Julys
1. 1891, 1971: 70.2
2. 1920: 70.9
3. 1947, 2009: 71.0
4. 1984: 71.2
5. 1962: 71.3
6. 1924, 1967: 71.4
7. 1882, 1960, 1979: 71.8
8. 1981: 71.9
9. 1909, 1965: 72.0
10. 1976: 72.1
11. 1950: 72.2
12. 1886, 1918: 72.3
13. 2000: 72.4
14. 1985: 72.7
15. 1925, 1972: 72.9
16. 1915, 1996: 73.0
17. 1888, 2007: 73.2
18. 1906: 73.3
19. 2003: 73.4
20. 1945, 1970, 1978, 1992: 73.5

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*For this and all other graphs, the 1870s include 1878-1879 only, and the 2010s include 2010-2012 only.

Top 5 Coldest July Highs
1. 7/15/1945: 66
2. 7/8/1899, 7/1/1914, 7/18/1939, 7/12/1940: 67
3. 7/8/1891, 7/9/1896, 7/5/1909, 7/3/1915, 7/7/1918, 7/1/1924, 7/9/1947, 7/20/1958, 7/21/1958, 7/5/1972, 7/19/2000: 68
4. 7/4/1882, 7/5/1882, 7/8/1882, 7/21/1902, 7/4/1922, 7/31/1925, 7/5/1970, 7/3/1972, 7/1/1979, 7/13/1990, 7/27/2004: 69
5. 7/15/1886, 7/16/1892, 7/23/1906, 7/20/1919, 7/3/1922, 7/28/1925, 7/13/1928 7/2/1929, 7/30/1971, 7/6/1972, 7/6/1983, 7/18/2009, 7/22/2009: 70

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Top 5 Coldest July Lows
1. 7/6/1972: 43
2. 7/1/1988: 44
3. 7/27/1962, 7/10/1963: 45
4. 7/6/1979: 46
5. 7/14/1950, 7/1/1965, 7/4/1968: 47

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Top 20 Warmest Julys
1. 2012: 80.5
2. 1934, 1999, 2011: 80.2
3. 1901: 79.9
4. 1887: 79.7
5. 1936: 79.6
6. 1955: 79.0
7. 1921: 78.7
8. 1878, 1881, 1931: 78.6
9. 1916: 78.5
10. 1879: 78.4
11. 1949: 78.3
12. 1935: 78.2
13. 2002: 77.9
14. 1898: 77.7
15. 1991: 77.6
16. 1941, 1988: 77.5
17. 1944: 77.3
18. 1897: 77.1
19. 1930, 2005, 2010: 77.0
20. 1952: 76.9

Top 5 Warmest July Highs
1. 7/21/1934, 7/14/1936: 106
2. 7/9/1936: 105
3. 7/22/1901, 7/4/1911, 7/25/1934, 7/11/1936, 7/14/1954: 104
4. 7/10/1881, 7/22/1934, 7/12/1936: 103
5. 7/12/1881, 7/4/1897, 7/24/1934, 7/26/1934, 7/8/1936, 7/27/1936: 102

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Top 5 Warmest July Lows
1. 7/10/1881: 82
2. 7/9/1881, 7/21/1934: 80
3. 7/4/1911, 7/21/1930, 7/22/1934, 7/30/1999: 79
4. 7/11/1881, 7/12/1881, 7/16/1887, 7/20/1930, 7/26/1934, 7/9/1936, 7/10/1936, 7/18/1942, 7/31/1999: 78
5. 7/12/1878, 7/18/1878, 7/3/1879, 7/15/1880, 7/7/1881, 7/17/1887, 7/6/1911, 7/1/1931, 7/13/1936, 7/22/1940, 7/26/1940, 7/16/1980, 7/5/1999, 7/28/2011: 77

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Top 5 Julys with 90 or Above Highs
1. 1955, 2012: 22
2. 1901, 1999: 20
3. 1949, 2011: 18
4. 1921, 1934, 1936: 17
5. 1887, 1898, 1916, 1940: 16

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Top 5 Julys with Most 100 or Above Highs
1. 1936: 8
2. 1934: 6
3. 1881, 1988: 5
4. 2012: 3
5. 1897, 1901, 1911, 1941: 2

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Top 5 Julys with Most 70 or Above Lows
1. 2011: 20
2. 1999: 19
3. 1878, 1901: 17
4. 1931, 2006, 2012: 16
5. 1916: 15

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Top 5 Greatest July Temperature Ranges in Degrees
1. 1988: 56
2. 1911, 1930, 1954: 52
3. 1936: 51
4. 1965: 50
5. 1940, 1963, 1972, 1983: 49

June Temperature Records: 1879-2012

Top 20 Coldest Junes
1. 1972: 63.6
2. 1927: 65.6
3. 1928: 65.7
4. 1982: 65.8
5. 1916: 65.9
6. 1903: 66.0
7. 1955, 1985: 66.9
8. 1907, 1958, 1961: 67.2
9. 1992, 2003: 67.3
10. 1886, 1926, 1977, 1980: 67.4
11. 1969: 67.6
12. 1889, 1974: 67.7
13. 1917, 1989: 67.8
14. 1915: 68.0
15. 1902, 1912: 68.2
16. 1910, 1950: 68.4
17. 1979: 68.6
18. 1924: 69.0
19. 1885, 1935: 69.1
20. 1920, 2006: 69.2

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*The 1870s include 1879 only, while the 2010s include 2010-2012 only. This goes for all graphs.

Top 5 Coldest June Highs
1. 1972: 51
2. 1889, 1917: 52
3. 1907: 54
4. 1945, 1956, 1985: 55
5. 1903: 56

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Top 5 Coldest June Lows
1. 1972: 35
2. 1913, 1966, 1977, 1990: 39
3, 1894, 1910, 1929, 1980, 1988, 1992: 41
4. 1889, 1969: 42
5. 1912, 1917, 1945, 1948, 1979, 1993: 43

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Top 20 Warmest Junes
1. 1934: 77.9
2. 1943: 76.9
3. 1933: 76.1
4. 1919: 75.6
5. 1944: 75.5
6. 1991: 75.0
7. 1895: 74.9
8. 1890, 1925: 74.6
9. 1952, 1999: 74.5
10. 1921, 1939, 1949, 2005: 74.4
11. 2010: 74.3
12. 1892: 74.2
13. 1898, 1994: 73.9
14. 1899, 1971, 2002: 73.5
15. 1901: 73.4
16. 1942: 73.3
17. 2008, 2012: 73.2
18. 1940, 1984, 2007: 73.1
19. 1941, 1995: 73.0
20. 1880, 1884, 1954: 72.9

Top 5 Warmest June Highs

1. 1944: 102
2. 1934, 1988: 101
3. 1952, 2012: 100
4. 1895, 1901: 99
5. 1911, 1913, 1933, 1953, 1994: 98

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Top 5 Warmest June Lows
1. 1914, 1934, 1944: 77
2. 1879, 1880, 1927, 1943, 2008: 76
3. 1913, 1925, 1933, 1969: 75
4. 1890, 1891, 1901, 1921, 1930, 1941, 1959, 1998, 1999: 74
5. 1881, 1882, 1884, 1887, 1888, 1895, 1897, 1899, 1923, 1931, 1942, 1981, 1994, 1996, 1997, 2005: 73

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Top 10 Junes with the Most 90+ Highs
1. 1934: 17
2. 1943: 15
3. 1933, 1953: 14
4. 1952: 13
5. 1914, 1944, 1999: 12
6. 1894, 1913, 1966, 1988, 1994: 11
7. 1895, 1954, 1956, 1991: 10
8. 1925, 1941, 1949, 1963, 2005, 2012: 9
9. 1899, 1901, 1923, 1959: 8
10. 1888, 1890, 1930, 1931, 1936, 1942, 1968, 1984, 2008: 7

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February Temperature Records 1879-2012

February Cold

Top 20 Coldest February Means

1. 1978: 16.6
2. 1979: 19.3
3. 1885: 19.4
4. 1895: 21.1
5. 2007: 21.2
6. 1905: 22.0
7. 1934: 22.1
8. 1963: 22.4
9. 1899: 22.6
10. 1902: 23.2
11. 1912: 23.4
12. 1901, 1914: 23.5
13. 1947: 24.1
14. 1936: 24.4
15. 1904: 24.7
16. 1958: 24.9
17. 1980: 25.2
18. 1968: 25.7
19. 1967: 25.8
20. 1917: 25.9

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*For the graph above, the 2010s include 2010 to 2012 and the 1870s include 1879 only.

Top 10 Coldest Daily February Highs

1. 1899: -7
2. 1895: -2
3. 1912, 1951: 4
4. 1933, 1996: 6
5. 1885, 1886, 1905, 1917: 7
6. 1896, 1903, 1965, 1988, 1993: 9
7. 1904, 1963, 1971: 10
8. 1958, 1979: 11
9. 1889, 1902, 1918, 1920, 1934, 1936, 1943, 1947, 1982, 2007: 12
10. 1881, 1914, 1977, 1978, 1981, 1995: 13

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*For the graph above, the 2010s include 2010 to 2012 and the 1870s include 1879 only.

Top 10 Coldest Daily February Lows

1. 1899: -20
2. 1951, 1977: -13
3. 1885, 1963: -11
4. 1918, 1948, 1985: -10
5. 1895, 1905, 1917, 1934: -8
6. 1900, 1912, 1936, 1965, 1979, 1982: -7
7. 1933, 1972: -6
8. 1886, 1898, 1904, 1978: -5
9. 1902: -4
10. 1906, 1958, 1995, 1996: -3

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*For the graph above, the 2010s include 2010 to 2012 and the 1870s include 1879 only.

Top 5 Februarys with Most 32 or Below Highs

1. 1978: 26
2. 1979: 19
3. 1902, 2007: 18
4. 1901, 1980: 17
5. 1895, 1904, 1936, 1947: 16

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*For the graph above, the 2010s include 2010 to 2012 and the 1870s include 1879 only.

Top 5 Februarys with Most 32 or Below Lows

1. 1901, 1916, 1934, 1963, 1968, 1972, 1978: 28
2. 1885, 1905, 1914, 1920, 1947, 1964, 1970, 1988, 2004, 2010: 27
3. 1879, 1895, 1904, 1907, 1910, 1917, 1924, 1936, 1960, 1962, 1967, 1969, 1979, 1993, 2003, 2007: 26
4. 1889, 1900, 1908, 1912, 1913, 1935, 1941, 1974, 1980, 1995: 25
5. 1902, 1923, 1928, 1937, 1942, 1948, 1952, 1955, 1959, 1977, 1994, 2006, 2008: 24

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*For the graph above, the 2010s include 2010 to 2012 and the 1870s include 1879 only.

February Heat

Top 20 Warmest February Means

1. 1882: 41.8
2. 1890: 40.6
3. 1998: 40.5
4. 1930: 40.4
5. 1932: 39.6
6. 1880: 38.8
7. 1954: 38.7
8. 1938: 38.1
9. 1927: 37.8
10. 1925: 37.6
11. 1984, 1990, 2000: 37.5
12. 1976: 37.4
13. 1884: 37.3
14. 1999: 37.0
15. 1891, 1961, 2012: 36.9
16. 1931, 1992: 36.8
17. 1949: 36.6
18. 1957: 36.5
19. 1887: 36.4
20. 1909, 1997: 36.2

Top 10 Warmest February Highs

1. 2000: 75
2. 1999: 74
3. 1957: 73
4. 1883, 1937, 1961: 72
5. 1996, 1997: 71
6. 1930, 1932, 1939, 1976, 2012: 70
7. 1925, 1954, 1984, 1994: 69
8. 1891, 1918, 1922, 1938, 1945, 1972: 68
9. 1911, 1921, 1950, 1983, 1990: 67
10. 1890, 1898, 1900, 1906, 1917, 1927, 1985, 1989, 2001, 2009: 66

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*For the graph above, the 2010s include 2010 to 2012 and the 1870s include 1879 only.

Top 10 Warmest February Lows

1. 1891: 57
2. 1997: 56
3. 1880, 1930: 55
4. 1890, 2000, 2008: 54
5. 1932, 1954: 53
6. 1957: 52
7. 1883, 1988: 51
8. 1887, 1922, 1938: 50
9. 1925, 1975, 1981: 49
10. 1882, 1884, 1911, 1944, 1984, 1996: 48

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*For the graph above, the 2010s include 2010 to 2012 and the 1870s include 1879 only.

Top 5 Februarys with Most 70 or Above Highs

1. 2000: 2
2. 1883, 1930, 1932, 1937, 1939, 1944, 1957, 1961, 1976, 1996, 1997, 1999, 2012: 1

Top 10 Months with the Greatest Temperature Range in Degrees (Monthly Max to Minimum)

1. 1899: 80
2. 1918, 1951: 78
3. 1985: 76
4. 1948: 75
5. 1917, 1972, 1996: 74
6. 1900: 73
7. 1895, 1936: 72
8. 1898, 1944: 71
9. 1904: 70
10. 1906, 1961, 1965, 1976: 69

January Temperature Records 1879-2012

January Cold

Top 20 Coldest January Means
1. 1977: 11.4
2. 1918: 15.9
3. 1940: 17.8
4. 1893: 18.9
5. 1978: 19.0
6. 1912: 19.2
7. 1884: 19.9
8. 1970: 20.6
9. 1982: 21.2
10. 1994: 21.3
11. 1948, 1979: 21.4
12. 1963, 1985: 21.7
13. 1920, 1966: 22.2
14. 2003, 2009: 22.6
15. 1904: 22.8
16. 1885: 22.9
17. 1981, 1984: 23.3
18. 1886: 23.4
19. 1961: 23.5
20. 1968: 23.6

Average January Mean By Decade
2010s*: 28.1
2000s: 29.8
1990s: 30.9
1980s: 26.7
1970s: 24.6
1960s: 27.0
1950s: 31.0
1940s: 29.5
1930s: 33.5
1920s: 28.7
1910s: 29.5
1900s: 30.0
1890s: 28.9
1880s: 28.2
1870s**: 25.6
*2010 to 2012
**1879 only

Top 10 Coldest Daily January Highs
1. 1985: -5
2. 1879, 1982: -4
3. 1893: -3
4. 1977: -2
5. 1884, 1970, 1994: -1
6. 1895, 1984: 0
7. 1886, 1940, 1962: 2
8. 1897, 1963: 3
9. 1924, 1936, 2009: 4
10. 1912, 1966: 5

Average Coldest January High By Decade
2010s*: 19.3
2000s: 18.3
1990s: 18.3
1980s: 10.7
1970s: 11.6
1960s: 11.7
1950s: 18.9
1940s: 16.5
1930s: 19.3
1920s: 14.7
1910s: 15.2
1900s: 15.6
1890s: 11.1
1880s: 14.9
1870s**: -4.0
*2010 to 2012
**1879 only

Top 10 Coldest Daily January Lows
1. 1994: -22
2. 1879, 1884: -20
3. 1977, 1985: -19
4. 1936, 1982, 1984: -16
5. 1963: -15
6. 1964: -14
7. 1918, 1948, 1961: -13
8. 1893, 1972: -12
9. 1886, 1940, 1965, 2009: -11
10. 1897: -10

Average Coldest January Low by Decade
2010s*: 3.3
2000s: 2.7
1990s: 3.2
1980s: -2.8
1970s: -3.5
1960s: -6.0
1950s: 2.2
1940s: 1.0
1930s: 6.0
1920s: 1.2
1910s: -0.7
1900s: 0.8
1890s: -1.6
1880s: -0.6
1870s**: -20.0
*2010 to 2012
**1879 only

Top 5 Januarys with Most 32 or Below Highs
1. 1977: 31
2. 1918, 1940: 24
3. 1978, 1985: 22
4. 1893, 1912, 1979, 2011: 21
5. 1966, 1970, 2003: 20

Average January 32 or Below Highs by Decade
2010s*: 15.3
2000s: 11.8
1990s: 8.9
1980s: 12.0
1970s: 16.2
1960s: 13.3
1950s: 9.4
1940s: 10.8
1930s: 6.7
1920s: 11.3
1910s: 10.9
1900s: 10.5
1890s: 11.1
1880s: 11.7
1870s**: 13.0
*2010 to 2012
**1879 only

Top 5 Januarys with Most 32 or Below Lows
1. 1902, 1918, 1920, 1945, 1970, 1971, 1976, 1977, 1979: 31
2. 1893, 1905, 1912, 1929, 1948, 1959, 1962, 1981, 2003, 2009, 2011: 30
3. 1881, 1884, 1892, 1915, 1922, 1925, 1940, 1956, 1957, 1958, 1978, 1982, 1987, 1991: 29
4. 1883, 1885, 1895, 1904, 1908, 1954, 1961, 1963, 1964, 1966, 1984, 1994, 2000, 2001: 28
5. 1886, 1887, 1888, 1903, 1917, 1923, 1980, 1983, 1988, 1996, 2004, 2010: 27

Average January 32 or Below Lows By Decade
2010s*: 27.3
2000s: 24.6
1990s: 24.5
1980s: 27.5
1970s: 28.3
1960s: 26.1
1950s: 26.6
1940s: 24.9
1930s: 22.5
1920s: 26.5
1910s: 25.6
1900s: 25.3
1890s: 24.1
1880s: 24.8
1870s**: 26.0
*2010 to 2012
**1879 only

January Heat

Top 20 Warmest January Means
1. 1880: 43.9
2. 2006: 40.7
3. 1932: 40.3
4. 1950: 39.9
5. 1933: 38.6
6. 1937: 37.8
7. 1990: 37.7
8. 1998: 37.6
9. 1949: 37.0
10. 1913: 36.9
11. 1906, 1989: 36.6
12. 1916: 36.0
13. 1947: 35.9
14. 2002: 35.6
15. 1939, 1953: 35.3
16. 1952: 35.1
17. 1967: 34.8
18. 1894: 34.7
19. 2007: 34.4
20. 1993: 34.3

Top 10 Warmest January Highs
1. 1950: 74
2. 1906: 72
3. 1932, 1998: 70
4. 2005: 69
5. 1916, 1946, 1967, 1996, 2008: 68
6. 1890, 1907, 1929, 1933, 1952, 1995, 1997: 67
7. 1887, 1898, 1909, 1914, 1937, 2002: 66
8. 1975, 1985, 1998: 65
9. 1897, 1947, 1949: 64
10. 1928, 1938, 1944, 1959, 1960: 63

Average January Warmest High By Decade
2010s*: 56.3
2000s: 59.7
1990s: 61.4
1980s: 55.7
1970s: 55.1
1960s: 57.8
1950s: 60.8
1940s: 57.9
1930s: 61.2
1920s: 56.1
1910s: 56.7
1900s: 60.4
1890s: 58.8
1880s: 55.6
1870s**: 56.0
*2010 to 2012
**1879 only

Top 10 Warmest January Lows
1. 1950: 58
2. 1890, 1967, 1997, 2008: 57
3. 1906, 1907: 56
4. 1998, 2005: 55
5. 1880, 1937, 1946, 1965, 1995: 54
6. 1909, 1916, 1930, 1993: 53
7. 2000, 2002, 2007: 52
8. 1932: 51
9. 1913, 1933, 1935, 1951: 50
10. 1894, 1952, 1988: 49

Average January Warmest Low By Decade
2010s*: 40.0
2000s: 46.3
1990s: 46.1
1980s: 39.1
1970s: 34.6
1960s: 43.6
1950s: 43.3
1940s: 41.2
1930s: 46.2
1920s: 40.0
1910s: 42.2
1900s: 44.3
1890s: 43.6
1880s: 40.9
1870s**: 42.0
*2010 to 2012
**1879 only

Top 5 Januarys with Most 60 or Above Highs
1. 1916, 1950: 7
2. 1890: 6
3. 1932: 5
4. 1880, 1949, 1952, 1967: 4
5. 1897, 1906, 1907, 1909, 1914, 1937, 1939, 1946, 1947, 1951, 1989, 1995, 1997, 1998, 1999, 2002, 2008: 3

Average January Highs 60 or Above By Decade
2010s*: 0.7
2000s: 1.2
1990s: 0.5
1980s: 0.6
1970s: 0.9
1960s: 1.6
1950s: 1.6
1940s: 1.3
1930s: 1.5
1920s: 0.2
1910s: 1.3
1900s: 1.1
1890s: 1.1
1880s: 0.5
1870s**: 0.0
*2010 to 2012
**1879 only

Top 10 Months with the Greatest Temperature Range in Degrees (Monthly Max to Minimum)
1. 1985: 84
2. 1879: 76
3, 1897: 74
4. 1982, 1999: 73
5. 1916, 1964, 1965, 1972, 1994: 72
6. 1887: 71
7. 1904, 2005: 70
8. 1930, 1948, 1959, 2000: 69
9. 1884, 1906, 1907, 1997: 68
10. 1886, 1929: 67