YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 41.95 | u | 39.00 | 43.20 | a | 49.57 | 52.85 | 59.21 | b | 68.05 | a | 63.80 | a | 57.55 | 52.83 | b | 43.67 | a | 40.00 | 51.79 | a | |||||
1960 | 34.56 | 40.52 | 42.08 | a | 46.85 | 52.15 | a | 61.22 | 69.68 | 62.92 | a | 60.82 | 53.72 | a | 42.68 | 40.05 | 50.60 | |||||||||
1961 | 41.12 | a | 41.52 | 43.27 | 46.87 | 53.82 | 65.72 | 67.56 | 69.03 | 57.78 | 49.97 | 40.70 | 37.02 | a | 51.20 | |||||||||||
1962 | 36.05 | 41.50 | a | 40.53 | 50.17 | 50.08 | a | 59.60 | 64.02 | 63.37 | 61.73 | 53.29 | 45.68 | 40.69 | 50.56 | |||||||||||
1963 | 33.82 | a | 46.18 | 43.19 | 44.85 | 55.55 | a | 58.07 | a | 60.34 | 63.85 | 63.77 | 53.10 | 43.48 | 39.09 | b | 50.44 | |||||||||
1964 | 37.57 | a | 40.97 | 40.95 | 45.93 | 51.76 | 57.80 | 64.02 | 61.60 | a | 57.20 | 53.67 | a | 40.92 | 36.41 | b | 49.07 | |||||||||
1965 | 37.53 | 40.04 | a | 46.20 | a | 49.87 | 52.27 | 59.27 | 66.95 | 64.70 | a | 58.26 | a | 56.69 | 47.54 | b | 38.87 | 51.52 | ||||||||
1966 | 37.34 | 39.64 | 42.84 | 50.18 | b | 56.63 | a | 58.52 | a | 63.18 | 64.31 | 62.22 | 51.84 | 44.70 | 40.56 | 51.00 | ||||||||||
1967 | 39.40 | 40.66 | 39.35 | 43.82 | 53.95 | 63.60 | 67.68 | 72.74 | 65.90 | 53.67 | a | 46.08 | 37.00 | a | 51.99 | |||||||||||
1968 | 37.21 | c | 45.63 | c | 46.97 | 48.50 | a | 55.55 | 61.02 | b | 67.73 | 64.55 | 61.14 | a | 51.24 | b | 45.83 | 35.10 | 51.71 | |||||||
1969 | 30.08 | 36.56 | a | 44.23 | 48.16 | a | 58.52 | 64.85 | 63.77 | 63.29 | 61.52 | a | 51.22 | a | 46.68 | 40.74 | 50.80 | |||||||||
1970 | 37.52 | a | 45.02 | 44.82 | a | 44.22 | 54.29 | 64.95 | 67.11 | 65.68 | 57.59 | a | 51.56 | 45.47 | a | 37.21 | 51.29 | |||||||||
1971 | 36.27 | 40.18 | 39.24 | 46.38 | a | 54.94 | 55.75 | 65.44 | 67.71 | 58.57 | 49.84 | 42.37 | 35.95 | 49.39 | ||||||||||||
1972 | 34.52 | a | 38.64 | 44.37 | 43.71 | a | 56.94 | 60.78 | 67.52 | b | 67.48 | a | 56.87 | 52.23 | 44.77 | 35.02 | b | 50.24 | ||||||||
1973 | 34.81 | 41.57 | 43.06 | 49.30 | 56.69 | b | 59.92 | 66.70 | a | 61.24 | 60.47 | a | 50.62 | c | 40.07 | 40.57 | a | 50.42 | ||||||||
1974 | 33.76 | 38.16 | 41.16 | 46.35 | 50.50 | b | 60.36 | a | 64.42 | e | 65.98 | a | 64.62 | 54.68 | 45.23 | 40.03 | a | 50.44 | ||||||||
1975 | 36.58 | 36.69 | a | 39.84 | 42.29 | a | 52.56 | 57.27 | 64.18 | a | 59.55 | 63.29 | a | 50.98 | a | 42.22 | 39.98 | 48.79 | ||||||||
1976 | 39.52 | 38.66 | a | 39.14 | b | 46.92 | 55.05 | 56.97 | 61.72 | b | 61.27 | 60.91 | b | 52.77 | 46.76 | c | 39.53 | 49.94 | ||||||||
1977 | 35.92 | 41.64 | 38.98 | 49.77 | 49.29 | 60.45 | a | 62.00 | 68.08 | a | 56.05 | 51.55 | a | 39.22 | 38.27 | 49.27 | ||||||||||
1978 | 37.72 | a | 40.81 | b | 45.84 | 45.80 | 50.63 | 60.76 | a | 64.48 | 63.20 | a | 56.20 | 54.31 | 38.52 | 32.69 | 49.25 | |||||||||
1979 | 27.97 | a | 34.48 | 44.02 | 46.24 | a | 54.25 | a | 59.09 | a | 64.76 | 62.33 | a | 62.15 | 54.19 | 41.50 | b | 39.44 | 49.20 | |||||||
1980 | 31.85 | 38.50 | 39.98 | 48.98 | a | 53.68 | n | ----- | z | ----- | z | 60.22 | d | 59.31 | c | 54.77 | e | 44.07 | 40.25 | a | 46.44 | c | ||||
1981 | 41.98 | 40.56 | a | 44.92 | g | 46.31 | a | 53.39 | 56.47 | a | 62.32 | a | 68.76 | 60.84 | b | 51.11 | 46.95 | 38.97 | 51.60 | a | ||||||
1982 | 35.36 | b | 38.87 | e | 42.15 | e | 44.96 | c | 54.29 | e | 62.71 | d | 64.11 | h | 65.30 | c | 61.32 | e | 52.77 | g | 40.98 | c | 38.09 | c | 48.40 | b |
1983 | 42.16 | f | 43.43 | e | 47.78 | d | 50.86 | e | 59.02 | b | 58.81 | a | 63.00 | 66.12 | a | 59.53 | a | 52.91 | c | 45.62 | 33.68 | c | 52.80 | a | ||
1984 | 40.48 | a | 42.91 | a | 46.58 | 46.05 | 51.25 | c | 57.54 | b | 65.90 | a | 64.45 | b | 59.72 | 48.71 | b | 42.28 | a | 34.32 | c | 50.01 | ||||
1985 | 36.53 | b | 35.89 | a | 41.69 | 48.95 | a | 54.43 | a | 59.44 | c | 70.80 | a | 63.88 | a | 57.18 | 50.05 | c | 32.84 | b | 36.26 | b | 49.00 | |||
1986 | 42.05 | a | 40.16 | 48.55 | a | 45.90 | a | 54.83 | a | 63.12 | 60.82 | 70.43 | a | 58.68 | 57.16 | b | 45.55 | a | 40.24 | 52.29 | ||||||
1987 | 37.73 | c | 44.43 | a | 45.97 | 53.16 | a | 58.05 | 63.23 | b | 64.73 | a | 67.48 | a | 65.62 | 58.82 | c | 48.25 | b | 37.02 | a | 53.71 | ||||
1988 | 37.76 | b | 43.56 | b | 44.43 | a | 50.11 | b | 54.05 | 59.90 | 66.50 | 65.77 | a | 62.43 | a | 58.22 | a | 43.70 | 40.27 | 52.22 | ||||||
1989 | 37.90 | 34.58 | c | 41.97 | b | 52.75 | 54.73 | 62.95 | 62.53 | 64.13 | 65.16 | a | 52.83 | a | 46.26 | c | 41.62 | b | 51.45 | |||||||
1990 | 40.29 | b | 36.30 | a | 46.68 | 52.78 | a | 54.35 | a | 60.32 | 69.40 | 67.60 | 64.42 | 49.85 | 44.22 | 33.77 | c | 51.66 | ||||||||
1991 | 37.60 | a | 47.71 | b | 42.85 | 47.69 | a | 51.97 | 56.29 | b | 67.05 | 67.58 | a | 65.25 | 58.41 | i | 42.17 | x | 41.93 | i | 53.78 | c | ||||
1992 | 42.25 | i | 48.06 | e | 53.04 | c | 52.44 | e | 62.32 | a | 65.73 | 68.14 | b | 68.07 | b | 60.89 | b | 55.45 | a | 44.27 | b | 36.18 | a | 55.87 | a | |
1993 | 33.79 | e | 38.96 | c | 46.89 | d | 48.33 | 59.50 | b | 59.81 | c | 61.12 | a | 66.08 | a | 65.59 | c | 57.22 | d | 41.04 | e | 39.57 | c | 51.49 | ||
1994 | 42.79 | b | 38.87 | a | 47.72 | a | 52.20 | e | 57.97 | 59.96 | b | 69.17 | d | 66.69 | 65.90 | 51.92 | a | 38.05 | a | 38.67 | a | 52.49 | ||||
1995 | 41.96 | c | ----- | z | 45.38 | b | 48.50 | b | ----- | z | 60.75 | ----- | z | 64.03 | a | ----- | z | 52.80 | a | 48.61 | b | ----- | z | 51.72 | e | |
1996 | ----- | z | ----- | z | 45.29 | c | 50.28 | a | 52.06 | 60.34 | a | 70.79 | b | 68.12 | b | 58.72 | c | 52.27 | a | 44.23 | b | 38.15 | 54.03 | b | ||
1997 | 38.94 | 42.25 | 43.58 | 47.69 | c | 59.98 | 60.43 | a | 66.10 | 68.88 | b | 64.38 | 51.52 | d | 48.65 | 39.89 | 52.69 | |||||||||
1998 | 39.65 | a | 43.65 | b | 46.37 | 50.88 | 54.18 | 62.30 | 69.68 | a | 69.06 | 65.93 | 54.43 | c | 45.47 | a | 37.33 | e | 53.24 | |||||||
1999 | 40.50 | b | 39.54 | a | 43.84 | b | 49.85 | c | 53.76 | f | 58.71 | a | 66.26 | 68.38 | a | 64.39 | b | 55.06 | d | 48.00 | b | 41.92 | a | 52.40 | a | |
2000 | 37.76 | b | 42.84 | a | 44.70 | c | 53.68 | b | 55.27 | c | 62.97 | a | 66.66 | b | 65.55 | a | 61.39 | c | 53.93 | b | 41.88 | a | 40.03 | 52.22 | ||
2001 | 40.73 | c | 40.95 | 45.88 | b | 47.53 | 57.58 | 59.50 | a | 65.37 | a | 66.60 | a | 63.02 | b | 52.53 | a | 47.53 | a | 39.04 | c | 52.19 | ||||
2002 | 38.87 | a | 42.02 | d | 42.00 | c | 48.90 | e | 54.20 | c | 63.38 | 68.27 | 66.80 | a | 64.05 | 53.43 | b | 48.70 | c | 42.27 | a | 52.74 | ||||
2003 | 44.88 | e | ----- | z | 45.06 | 48.81 | a | 56.21 | c | 64.86 | a | 69.85 | 67.76 | 64.34 | a | ----- | z | 42.13 | c | 40.05 | a | 54.40 | b | |||
2004 | 38.48 | b | 43.29 | 48.32 | a | 52.75 | 55.66 | 62.55 | a | 69.45 | b | 69.05 | a | 60.79 | a | 54.86 | b | 46.02 | c | 42.58 | 53.65 | |||||
2005 | 40.65 | a | 45.57 | a | 49.05 | b | 50.59 | b | 58.82 | 59.56 | c | 67.36 | b | 69.35 | d | 61.14 | b | 54.33 | b | 43.79 | b | 39.33 | d | 53.30 | ||
2006 | 41.38 | c | 40.82 | c | 43.02 | 50.97 | ----- | z | 64.00 | a | 69.47 | a | 67.44 | 63.92 | 52.21 | b | 43.93 | b | 40.22 | b | 52.49 | a | ||||
2007 | 37.28 | b | 41.94 | a | 47.31 | 49.80 | 57.50 | a | 60.83 | 68.76 | 66.48 | a | 60.43 | b | 50.98 | a | 43.94 | c | ----- | z | 53.21 | a | ||||
2008 | 35.52 | 41.81 | b | 41.83 | a | 44.94 | d | 55.78 | b | 59.00 | c | 67.71 | b | 67.37 | a | 63.67 | a | 53.63 | 48.48 | b | 36.29 | e | 51.34 | |||
2009 | 37.32 | f | 40.93 | e | 40.15 | d | 48.33 | f | 57.89 | c | 62.70 | b | 72.44 | 68.20 | d | 64.95 | 51.15 | 43.67 | 36.68 | a | 53.88 | b | ||||
2010 | 43.58 | a | 44.94 | a | 46.45 | a | 47.80 | 52.68 | 58.69 | a | 67.03 | 66.87 | 62.54 | c | 54.89 | 43.47 | 41.34 | 52.52 | ||||||||
2011 | 39.77 | 39.00 | 42.68 | 44.50 | 52.61 | 59.37 | 63.94 | 67.66 | b | 66.86 | a | 54.20 | a | 43.52 | 40.21 | 51.19 | ||||||||||
2012 | 39.67 | b | 42.60 | 41.74 | 49.74 | g | 55.16 | l | 58.62 | f | 66.86 | j | 69.89 | h | 64.22 | g | 53.98 | b | 47.48 | c | 39.17 | d | 44.11 | f | ||
2013 | 37.33 | e | 41.45 | g | 46.36 | c | 52.66 | n | 57.58 | 63.73 | b | 68.92 | f | 69.52 | 63.92 | 54.52 | b | 46.04 | b | 36.25 | a | 52.80 | c | |||
2014 | 43.18 | f | 39.20 | r | 46.67 | b | 50.98 | a | 59.08 | f | 60.50 | l | 70.82 | 70.71 | b | 66.29 | a | 58.26 | 45.97 | 42.92 | 56.58 | d | ||||
2015 | 45.06 | 49.30 | c | 52.65 | 52.48 | 60.06 | d | 67.27 | f | 71.40 | b | 70.84 | 61.73 | 57.89 | 43.08 | 39.45 | a | 54.90 | a | |||||||
2016 | 41.37 | e | 46.66 | 46.86 | c | 56.72 | 60.33 | d | 64.33 | c | 65.95 | a | 69.98 | 61.60 | 53.88 | a | 50.38 | a | 35.32 | 54.45 | ||||||
2017 | 34.63 | 39.93 | 42.82 | 47.98 | 58.13 | a | 62.74 | a | 68.21 | 72.71 | 65.10 | 53.04 | d | 44.00 | 38.35 | 52.30 | ||||||||||
2018 | 42.10 | 38.62 | 43.16 | 50.33 | a | 60.98 | a | 62.55 | h | 71.75 | e | 70.50 | a | 60.98 | 55.37 | a | 47.45 | 40.69 | 52.90 | a | ||||||
2019 | 42.06 | 35.77 | 43.90 | 50.54 | c | 59.36 | b | 62.80 | 66.23 | a | 68.52 | 61.55 | 49.82 | 47.17 | 42.06 | 52.48 | ||||||||||
2020 | 40.44 | 42.70 | g | 44.06 | 51.85 | 57.15 | 60.98 | 67.11 | 68.45 | 65.59 | b | 55.10 | 44.68 | 42.37 | 54.34 | a | ||||||||||
2021 | 41.98 | 37.50 | 43.94 | 52.38 | b | 56.77 | 68.57 | b | 70.18 | a | 69.18 | 64.31 | a | 51.95 | 47.33 | 37.68 | 53.48 | |||||||||
2022 | 40.11 | 41.61 | 46.34 | 45.28 | a | 52.38 | a | 61.28 | 70.58 | a | 72.18 | 67.12 | 60.95 | 42.40 | 37.16 | 53.12 | ||||||||||
2023 | 40.97 | 38.93 | 41.45 | 46.53 | 60.53 | 63.65 | 70.09 | b | 72.34 | 63.40 | 55.23 | 47.14 | a | 43.79 | b | 53.67 | ||||||||||
2024 | 37.42 | 41.77 | c | 45.14 | i | 49.50 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.59 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.31 | 41.05 | 44.23 | 48.71 | 55.46 | 60.99 | 66.74 | 66.75 | 62.04 | 53.47 | 44.43 | 38.77 | 51.47 | |||||||||||||
S.D. | 3.38 | 3.25 | 3.00 | 2.93 | 3.04 | 2.65 | 2.97 | 3.06 | 2.92 | 2.46 | 3.05 | 2.46 | 1.48 | |||||||||||||
SKEW | -0.53 | 0.31 | 0.50 | 0.12 | 0.14 | 0.34 | -0.23 | -0.21 | -0.27 | 0.64 | -0.93 | -0.37 | -0.08 | |||||||||||||
MAX | 45.06 | 49.30 | 53.04 | 56.72 | 62.32 | 68.57 | 72.44 | 72.74 | 67.12 | 60.95 | 50.38 | 43.79 | 54.45 | |||||||||||||
MIN | 27.97 | 34.48 | 38.98 | 42.29 | 49.29 | 55.75 | 60.34 | 59.55 | 56.05 | 48.71 | 32.84 | 32.69 | 48.79 | |||||||||||||
YRS | 60 | 60 | 64 | 62 | 59 | 60 | 60 | 64 | 63 | 62 | 64 | 62 | 45 |