YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1917 | 33.30 | u | 39.32 | 38.84 | 46.00 | 53.48 | 66.70 | 71.58 | 65.61 | 63.60 | 56.19 | 44.40 | 40.13 | 53.26 | a | |||||||||||
1918 | 38.68 | 41.29 | 46.52 | 54.40 | 53.61 | 68.93 | 65.68 | 64.87 | 59.87 | ----- | z | 38.63 | 36.39 | 51.71 | a | |||||||||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | 56.16 | 55.53 | 58.06 | 64.00 | 63.23 | 50.94 | 46.00 | 37.65 | 53.95 | d | ||||||||
1998 | 40.16 | 40.43 | 43.94 | 44.07 | 49.16 | 52.97 | 61.97 | 65.16 | 57.00 | 47.16 | 40.43 | 35.00 | 48.12 | |||||||||||||
1999 | 35.77 | 35.82 | 38.19 | 40.23 | 47.81 | 50.70 | 58.58 | 56.74 | 52.50 | 49.32 | 40.47 | 33.42 | 44.96 | |||||||||||||
2000 | 37.74 | d | 38.55 | 38.58 | 43.33 | 49.52 | 52.77 | 54.00 | 57.45 | 57.13 | 50.48 | 39.53 | 40.13 | 46.60 | ||||||||||||
2001 | 36.31 | b | 39.93 | 45.29 | 43.17 | 52.42 | 57.00 | 56.90 | 60.03 | 56.90 | 51.19 | 42.20 | 35.13 | 48.04 | ||||||||||||
2002 | 34.55 | 35.82 | 38.13 | 43.41 | a | 45.58 | 50.83 | 56.29 | 54.87 | 55.97 | 45.90 | 42.17 | 35.19 | 44.89 | ||||||||||||
2003 | 39.81 | 39.89 | 41.35 | 40.93 | 49.32 | 53.33 | 61.87 | 61.94 | 57.17 | 51.35 | 39.37 | 35.61 | 47.66 | |||||||||||||
2004 | 36.48 | 35.55 | 45.42 | 45.67 | 50.94 | 52.77 | 58.00 | 56.94 | 54.20 | 47.29 | 37.70 | 36.03 | 46.42 | |||||||||||||
2005 | 37.10 | 39.93 | 41.61 | 41.33 | 49.29 | 51.83 | 61.26 | 60.84 | 51.23 | 48.39 | 41.67 | 37.81 | 46.86 | |||||||||||||
2006 | 36.52 | 37.64 | 37.32 | 43.87 | 50.66 | b | 59.33 | 66.19 | 57.29 | 54.97 | a | 46.87 | 44.10 | 36.77 | 47.63 | |||||||||||
2007 | 35.29 | 40.71 | 42.94 | 45.67 | 47.84 | 51.27 | 59.29 | 63.13 | 56.00 | 49.32 | 45.93 | 37.06 | 47.87 | |||||||||||||
2008 | 39.71 | 41.62 | 43.68 | 46.20 | 49.81 | 55.67 | 59.72 | m | 60.76 | n | 58.58 | r | 53.94 | n | 44.91 | s | 38.55 | t | 46.11 | f | ||||||
2009 | 41.10 | 40.21 | 43.48 | 45.63 | 53.42 | 54.90 | 61.03 | 60.16 | 60.97 | 49.84 | 44.30 | 39.29 | 49.53 | |||||||||||||
2010 | 40.52 | 42.14 | 43.32 | 44.57 | 47.61 | 54.37 | 62.13 | 61.45 | 59.10 | 54.68 | 43.27 | 43.68 | 49.74 | |||||||||||||
2011 | 41.32 | 36.71 | g | 44.06 | 48.23 | 48.94 | 53.67 | 60.87 | 61.35 | 60.90 | 53.71 | 42.70 | 36.52 | 50.21 | a | |||||||||||
2012 | 36.78 | m | 39.17 | 40.03 | 48.17 | 53.87 | 55.03 | 60.77 | 68.13 | 67.37 | 56.94 | 50.97 | 44.52 | 53.18 | a | |||||||||||
2013 | 42.00 | 41.00 | 48.33 | d | 49.37 | 54.29 | 57.97 | 66.19 | 65.13 | 64.07 | 52.97 | 51.13 | 45.94 | 53.20 | ||||||||||||
2014 | 50.71 | 47.75 | 49.00 | 50.67 | 56.26 | 57.37 | 65.39 | 64.19 | 65.27 | 60.16 | 52.87 | 46.80 | a | 55.54 | ||||||||||||
2015 | 49.23 | 51.14 | 52.90 | 50.47 | 52.54 | c | 63.20 | 62.77 | 66.90 | 66.27 | 61.44 | d | 48.33 | c | 43.97 | 55.76 | ||||||||||
2016 | 44.83 | a | 51.66 | 49.29 | 51.73 | 52.58 | 63.07 | 65.65 | 65.61 | 61.03 | a | 58.20 | a | 54.07 | a | 45.87 | 55.30 | |||||||||
2017 | 43.50 | a | 46.89 | 51.06 | 51.03 | 54.31 | b | 61.87 | 67.23 | 67.29 | 62.87 | 59.58 | 54.33 | 49.65 | 55.80 | |||||||||||
2018 | 50.52 | 45.93 | 47.68 | 50.73 | 52.94 | 57.77 | 69.19 | 66.19 | 63.20 | 57.23 | 51.03 | 46.55 | 54.91 | |||||||||||||
2019 | 45.58 | 39.50 | 46.45 | 51.71 | b | 49.43 | a | 57.57 | 64.90 | 66.42 | 63.43 | 55.45 | 51.43 | 45.23 | 53.09 | |||||||||||
2020 | 44.94 | 45.59 | 44.55 | 51.70 | 56.52 | 58.00 | 63.23 | 68.45 | 67.47 | 60.90 | 50.57 | 45.97 | 54.82 | |||||||||||||
2021 | 46.10 | 44.86 | 43.13 | 50.40 | 52.32 | 61.57 | 68.16 | 67.39 | 64.13 | 53.74 | 54.40 | 44.43 | c | 54.22 | ||||||||||||
2022 | 48.10 | 43.30 | e | 49.33 | a | 51.40 | 53.45 | 62.60 | 65.39 | 69.68 | 67.63 | 57.77 | 46.27 | 45.39 | 55.03 | |||||||||||
2023 | 42.39 | 40.82 | 42.58 | 49.63 | 51.90 | 54.23 | 68.35 | 66.67 | y | ----- | z | ----- | z | ----- | z | ----- | z | 49.99 | e | |||||||
2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 41.50 | 41.72 | 44.18 | 47.28 | 51.59 | 56.99 | 62.89 | 63.23 | 60.50 | 53.35 | 45.86 | 40.74 | 50.73 | |||||||||||||
S.D. | 4.83 | 4.22 | 4.13 | 3.89 | 2.83 | 4.77 | 4.30 | 4.09 | 4.72 | 4.72 | 5.30 | 4.82 | 3.98 | |||||||||||||
SKEW | 0.43 | 0.80 | 0.17 | -0.13 | -0.10 | 0.77 | -0.07 | -0.44 | -0.21 | 0.14 | 0.22 | 0.14 | 0.03 | |||||||||||||
MAX | 50.71 | 51.66 | 52.90 | 54.40 | 56.52 | 68.93 | 71.58 | 69.68 | 67.63 | 61.44 | 54.40 | 49.65 | 55.80 | |||||||||||||
MIN | 34.55 | 35.55 | 37.32 | 40.23 | 45.58 | 50.70 | 54.00 | 54.87 | 51.23 | 45.90 | 37.70 | 33.42 | 44.89 | |||||||||||||
YRS | 26 | 27 | 28 | 28 | 29 | 29 | 28 | 27 | 27 | 26 | 27 | 27 | 22 |