| Earliest First Occurrence |
| Rank |
Date |
Temperature |
| 1 |
Mar 9, 1911 |
100 |
| 2 |
Mar 21, 1916 |
100 |
| 3 |
Apr 17, 2006 |
101 |
| 4 |
Apr 18, 1925 |
100 |
| 5 |
May 4, 1947 |
100 |
| 6 |
May 6, 1998 |
100 |
| 7 |
May 27, 1928 |
103 |
| 8 |
May 28, 1927 |
107 |
9
(tie) |
May 30, 2003 |
100 |
| May 30, 1985 |
103 |
|
| Latest Last Occurrence |
| Rank |
Date |
Temperature |
| 1 |
Oct 3, 1951 |
106 |
2
(tie) |
Oct 1, 1979 |
102 |
| Oct 1, 1938 |
101 |
| 4 |
Sep 29, 2011 |
101 |
5
(tie) |
Sep 28, 2005 |
104 |
| Sep 28, 1953 |
105 |
| 7 |
Sep 27, 1977 |
101 |
| 8 |
Sep 25, 1931 |
100 |
| 9 |
Sep 24, 2023 |
102 |
10
(tie) |
Sep 20, 2021 |
100 |
| Sep 20, 2016 |
100 |
| Sep 20, 1954 |
100 |
| Sep 20, 1937 |
100 |
|
| Latest First Occurrence |
| Rank |
Date |
Temperature |
1
(tie) |
1973 |
none |
| 1906 |
none |
| 3 |
Aug 23, 1989 |
101 |
| 4 |
Aug 19, 1905 |
102 |
| 5 |
Aug 16, 1903 |
100 |
| 6 |
Aug 11, 2007 |
100 |
| 7 |
Aug 10, 1992 |
100 |
| 8 |
Aug 8, 1968 |
100 |
9
(tie) |
Aug 7, 1919 |
100 |
| Aug 7, 1908 |
100 |
|
| Earliest Last Occurrence |
| Rank |
Date |
Temperature |
| 1 |
May 30, 1928 |
101 |
| 2 |
Jul 12, 1904 |
103 |
| 3 |
Jul 14, 1933 |
104 |
| 4 |
Jul 16, 2004 |
100 |
| 5 |
Jul 22, 1971 |
100 |
| 6 |
Jul 25, 2002 |
100 |
7
(tie) |
Aug 1, 1920 |
100 |
| Aug 1, 1914 |
100 |
| 9 |
Aug 3, 1912 |
102 |
| 10 |
Aug 4, 1961 |
100 |
|
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