YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 42.04 | q | 44.71 | 43.77 | 55.30 | 64.78 | a | 69.92 | 73.79 | 73.92 | 67.22 | 58.24 | 48.20 | 41.09 | b | 58.27 | a | |||||||||
1942 | 37.76 | 40.32 | 46.75 | e | 55.38 | f | 64.61 | 73.91 | a | 74.87 | 74.32 | 68.90 | 59.21 | 54.63 | d | 49.45 | t | 59.53 | b | |||||||
1943 | 39.50 | a | 45.16 | 50.44 | 64.00 | a | 66.78 | a | 75.95 | 77.00 | i | 81.29 | 69.58 | d | 58.08 | a | 46.91 | a | 37.67 | a | 57.76 | a | ||||
1944 | 38.67 | b | 42.69 | b | 47.06 | 54.48 | a | 66.05 | b | 75.43 | b | 77.35 | 76.98 | a | 68.25 | 59.60 | 45.90 | 37.18 | 57.47 | |||||||
1945 | 39.45 | 45.54 | c | 50.69 | 55.34 | a | 69.31 | 72.72 | a | 75.37 | a | 76.58 | 69.92 | 57.94 | 50.02 | 40.55 | a | 58.62 | ||||||||
1946 | 35.95 | 44.68 | 51.34 | 63.62 | 64.90 | 75.80 | 78.21 | 77.87 | 69.81 | a | 60.45 | 46.92 | d | 44.27 | 59.49 | |||||||||||
1947 | 36.89 | 40.32 | 45.95 | 54.92 | 65.31 | 75.47 | o | 77.98 | 76.58 | 72.45 | 64.95 | c | 42.12 | 38.87 | 56.03 | a | ||||||||||
1948 | 33.95 | b | 38.47 | 42.32 | 60.20 | 66.34 | 76.10 | 78.87 | 77.50 | 70.87 | 59.74 | d | 42.86 | a | 42.32 | 57.46 | ||||||||||
1949 | 27.82 | 41.89 | 48.90 | 55.22 | 65.59 | h | 72.85 | 77.44 | 75.58 | 68.35 | 58.41 | b | 51.95 | 37.93 | b | 56.03 | a | |||||||||
1950 | 43.23 | 46.79 | 46.57 | i | 57.02 | 65.58 | 75.62 | 73.98 | 74.31 | 67.33 | 64.37 | 47.38 | 41.38 | a | 59.73 | a | ||||||||||
1951 | 36.80 | c | 40.88 | 46.40 | 53.92 | 64.47 | 73.52 | 80.58 | 78.88 | a | 70.75 | 61.35 | 44.61 | b | 40.32 | 57.71 | ||||||||||
1952 | 42.37 | 43.34 | 44.98 | 55.33 | 64.87 | 78.45 | 75.82 | 79.35 | 69.20 | 58.90 | 42.23 | 38.97 | 57.82 | |||||||||||||
1953 | 45.73 | 41.05 | 52.53 | 56.05 | 63.82 | 79.98 | 78.42 | 76.31 | 71.97 | 59.69 | 47.92 | 35.03 | 59.04 | |||||||||||||
1954 | 41.50 | 47.66 | 48.15 | a | 61.75 | 63.94 | 76.05 | 80.52 | 76.82 | 73.02 | 60.63 | 49.63 | 40.95 | 60.05 | ||||||||||||
1955 | 37.87 | 38.50 | 47.85 | 57.65 | 65.11 | 72.35 | 75.44 | 76.58 | 71.82 | 60.11 | 47.53 | 42.73 | 57.80 | |||||||||||||
1956 | 41.31 | 36.62 | a | 49.71 | 55.18 | 69.33 | a | 77.67 | 77.94 | 76.10 | 73.20 | 63.11 | 44.45 | 41.27 | 58.82 | |||||||||||
1957 | 39.31 | 48.88 | 47.95 | 53.98 | 62.35 | 73.47 | 80.23 | 77.56 | 67.60 | 56.92 | 42.02 | 43.63 | 57.82 | |||||||||||||
1958 | 35.85 | 42.25 | 40.66 | 52.82 | 66.50 | 76.37 | 78.89 | 77.45 | 69.05 | 56.24 | 47.27 | 39.26 | 56.88 | |||||||||||||
1959 | 37.21 | 39.71 | 45.55 | 55.93 | 66.45 | 73.97 | 74.68 | 76.65 | 71.45 | 57.23 | 42.37 | 39.98 | a | 56.76 | ||||||||||||
1960 | 34.35 | 35.43 | 45.34 | 58.87 | 64.08 | 76.25 | 74.16 | 74.90 | 69.37 | 57.90 | 48.03 | 32.89 | 55.96 | |||||||||||||
1961 | 33.23 | 41.04 | e | 46.27 | e | 54.12 | 65.10 | 73.30 | 73.06 | 72.68 | 66.03 | 58.24 | 39.67 | 37.98 | 55.06 | |||||||||||
1962 | 31.76 | 45.32 | 43.03 | 56.22 | 68.32 | 72.18 | 74.85 | 76.76 | 69.02 | 59.27 | 48.43 | 39.83 | a | 57.08 | ||||||||||||
1963 | 30.76 | 41.70 | 48.66 | 60.45 | 67.02 | 73.37 | 79.68 | 76.76 | 70.63 | 64.15 | 48.75 | 34.76 | 58.06 | |||||||||||||
1964 | 35.16 | 32.10 | 45.21 | 55.93 | 66.21 | 73.83 | 79.47 | 76.82 | 68.48 | 59.94 | 47.27 | 38.60 | 56.59 | |||||||||||||
1965 | 41.29 | 37.39 | 40.48 | 58.85 | 64.84 | 72.72 | 78.06 | 73.89 | 67.57 | 57.89 | 52.60 | 42.11 | 57.31 | |||||||||||||
1966 | 31.81 | 36.95 | 49.76 | 56.62 | 64.55 | 72.50 | 80.63 | 73.32 | 68.80 | 56.77 | 50.75 | 37.53 | 56.67 | |||||||||||||
1967 | 39.27 | 40.88 | 54.10 | a | 61.34 | a | 64.45 | 73.52 | 76.05 | 72.37 | 67.93 | 59.63 | 48.68 | 33.36 | b | 57.63 | ||||||||||
1968 | 38.92 | e | 40.43 | 47.26 | 53.02 | a | 62.88 | r | 75.50 | 75.38 | a | 74.53 | 68.28 | 60.42 | 45.95 | 39.56 | 56.30 | a | ||||||||
1969 | 43.96 | c | 42.29 | 39.74 | 59.27 | 65.92 | 72.05 | 81.03 | 79.06 | 69.50 | 55.32 | 46.40 | 41.90 | 58.04 | ||||||||||||
1970 | 34.94 | 44.06 | b | 43.31 | d | 54.35 | 64.58 | 71.02 | 76.19 | m | 76.11 | 67.92 | 52.87 | 46.10 | a | 42.90 | 54.38 | a | ||||||||
1971 | 39.82 | 39.84 | 48.81 | 55.68 | 65.11 | 74.35 | ----- | z | 69.31 | 65.57 | 56.11 | 47.20 | 38.50 | 54.57 | a | |||||||||||
1972 | 39.33 | b | 41.98 | a | 51.95 | 59.47 | 62.81 | 71.45 | 71.42 | 69.47 | 65.10 | a | 55.42 | 37.75 | 37.76 | 55.33 | ||||||||||
1973 | 34.26 | 38.54 | 46.66 | 49.96 | b | 61.82 | 72.02 | 74.47 | 75.50 | 66.72 | 60.28 | b | ----- | z | ----- | z | 58.02 | b | ||||||||
1974 | 41.52 | e | ----- | z | ----- | z | 57.26 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.80 | c | 45.53 | i |
1975 | 39.29 | 38.29 | 46.18 | a | 54.18 | 64.13 | 73.98 | 73.02 | 76.84 | 65.36 | a | 59.06 | ----- | z | ----- | z | 59.03 | b | ||||||||
1976 | 37.28 | b | 49.48 | a | 49.52 | 60.17 | 64.28 | a | 75.30 | 74.92 | 75.48 | 68.35 | 53.32 | a | 41.78 | 37.87 | 57.31 | |||||||||
1977 | 33.63 | a | 43.74 | a | 48.85 | a | 57.29 | a | 68.35 | 78.15 | 79.53 | 78.07 | a | 73.58 | 61.19 | 48.34 | a | 44.14 | b | 59.57 | ||||||
1978 | 33.72 | a | 36.43 | 51.32 | a | 60.66 | a | 66.55 | 74.93 | 79.02 | 72.42 | 65.85 | 57.24 | 46.57 | a | 33.64 | b | 56.53 | ||||||||
1979 | 29.60 | 39.39 | a | 47.65 | 57.41 | a | 65.21 | b | 71.02 | 78.42 | 74.74 | 70.87 | 61.48 | 42.02 | 38.95 | 56.40 | ||||||||||
1980 | 38.24 | b | 41.97 | 47.24 | 54.55 | 64.15 | 80.78 | 83.37 | 77.87 | 69.82 | 56.21 | 45.21 | a | 43.94 | 58.61 | |||||||||||
1981 | 39.45 | a | 43.93 | a | 48.66 | 60.72 | 65.17 | b | 77.28 | 78.57 | a | 73.32 | 68.37 | 58.10 | 51.85 | 42.42 | 58.99 | |||||||||
1982 | 36.82 | a | 39.24 | a | 50.10 | a | 56.52 | a | 64.58 | 73.53 | 77.77 | 77.52 | 71.32 | 56.12 | a | 44.73 | b | 35.10 | 56.95 | |||||||
1983 | 36.55 | b | 42.37 | a | 48.29 | 51.10 | a | 63.63 | 72.50 | a | 78.84 | b | 77.47 | 73.18 | 60.13 | 49.00 | 32.19 | d | 57.10 | |||||||
1984 | 35.50 | 42.68 | a | 47.83 | a | 53.64 | a | 67.45 | a | 73.10 | a | 75.34 | 73.65 | 68.36 | b | 55.10 | a | 48.37 | 42.19 | 56.93 | ||||||
1985 | 34.79 | 38.81 | b | 51.37 | 60.22 | ----- | z | 72.05 | 76.93 | a | 77.10 | b | 69.66 | b | ----- | z | 51.24 | a | 37.16 | 56.93 | b | |||||
1986 | 42.92 | 44.59 | 52.92 | ----- | z | ----- | z | 72.30 | 77.03 | 75.03 | 69.48 | 57.05 | a | 43.65 | 37.45 | 57.24 | b | |||||||||
1987 | 38.31 | 42.14 | 46.18 | 54.71 | a | 64.61 | 73.72 | a | 77.39 | 75.77 | a | 67.52 | 60.92 | 46.12 | 38.40 | a | 57.15 | |||||||||
1988 | 35.13 | 41.86 | 49.02 | 56.55 | 64.15 | 72.92 | 73.06 | 76.09 | d | 68.90 | i | 61.45 | 49.80 | 37.95 | 56.18 | a | ||||||||||
1989 | 40.84 | 39.30 | 54.45 | 62.30 | 70.34 | 72.80 | 76.11 | 75.68 | a | 66.20 | 60.56 | 48.63 | 34.71 | 58.49 | ||||||||||||
1990 | 39.89 | 42.52 | 49.75 | a | 58.35 | 66.29 | 83.12 | 74.84 | 74.02 | 69.87 | 59.23 | 50.10 | 37.45 | a | 58.78 | |||||||||||
1991 | 36.39 | 44.43 | 50.31 | 59.88 | 70.03 | 74.29 | a | 73.45 | 73.79 | 64.78 | 59.16 | 43.80 | 38.84 | 57.43 | ||||||||||||
1992 | 35.26 | 45.00 | 51.50 | 60.07 | 63.22 | b | 71.77 | 76.68 | 73.92 | 69.72 | 62.03 | 43.74 | a | 39.42 | a | 57.69 | ||||||||||
1993 | 39.38 | a | 40.92 | b | 49.98 | b | 58.48 | a | 65.53 | b | 74.73 | b | 77.87 | a | 74.30 | a | 68.67 | a | 57.29 | b | 43.10 | 40.42 | a | 57.56 | ||
1994 | 38.32 | 43.04 | a | 50.05 | a | 58.50 | a | 66.89 | 79.64 | b | 78.65 | a | 77.82 | 70.67 | a | 59.05 | b | 49.16 | a | 42.92 | 59.56 | |||||
1995 | 40.61 | 47.70 | 49.02 | 56.52 | c | 66.55 | c | 73.33 | a | 79.22 | a | 78.13 | 68.91 | b | 61.03 | b | 50.66 | a | 41.02 | a | 59.39 | |||||
1996 | 40.33 | b | 46.77 | a | 47.30 | a | 58.42 | f | 74.55 | 76.98 | b | 78.60 | 75.18 | 67.00 | a | 58.65 | a | 48.32 | b | 42.93 | a | 59.69 | a | |||
1997 | 35.48 | b | 39.42 | b | 51.73 | 52.55 | 65.56 | d | 74.72 | a | 78.07 | a | 77.10 | a | 73.47 | a | 58.95 | b | 45.46 | b | 34.53 | a | 57.25 | |||
1998 | 42.73 | 42.73 | 47.23 | a | 55.64 | a | 71.55 | 79.00 | a | 80.02 | f | 76.63 | e | 78.17 | c | 66.33 | j | 54.19 | n | 39.54 | r | 61.71 | d | |||
1999 | ----- | z | ----- | z | ----- | z | 60.50 | n | 68.98 | e | 74.31 | c | 78.27 | a | 78.02 | 71.29 | b | 61.62 | f | 53.89 | c | 39.68 | 66.35 | e | ||
2000 | 44.43 | a | 50.12 | a | 51.88 | b | 63.28 | a | 74.10 | a | 76.00 | e | 79.65 | a | 78.66 | b | 73.86 | a | 59.67 | d | 35.69 | q | ----- | z | 65.16 | b |
2001 | ----- | z | ----- | z | 48.30 | k | 61.80 | e | 67.71 | e | 77.72 | a | 82.59 | t | 78.59 | n | ----- | z | ----- | z | 50.40 | a | 40.37 | 59.60 | g | |
2002 | 42.04 | e | 41.75 | d | 47.77 | c | 62.16 | b | 69.38 | c | 79.21 | a | 78.95 | 80.10 | b | 70.47 | 55.41 | c | 44.25 | 38.52 | c | 59.17 | ||||
2003 | 41.13 | 41.34 | c | 50.82 | c | 59.60 | 67.42 | 70.52 | b | 78.23 | a | 77.29 | b | 69.54 | c | 61.95 | a | 47.47 | 41.73 | 58.92 | ||||||
2004 | 41.86 | b | 38.66 | d | 55.16 | b | 56.38 | a | 69.05 | b | 75.07 | c | 76.40 | e | 73.40 | b | 68.11 | g | 62.07 | b | 44.35 | j | ----- | z | 60.89 | c |
2005 | 46.20 | u | 44.07 | a | 47.55 | 56.62 | a | 65.06 | e | 76.67 | 78.65 | a | 74.44 | 71.12 | 59.40 | a | 49.83 | a | 41.38 | c | 60.43 | a | ||||
2006 | 43.84 | b | 42.55 | 50.98 | a | 62.72 | a | 71.46 | c | 78.05 | a | 80.00 | b | 73.48 | j | 65.43 | 58.56 | 49.35 | 40.19 | 58.47 | a | |||||
2007 | 30.59 | b | 43.82 | 52.97 | 55.36 | b | 63.75 | a | 71.18 | 75.33 | a | 78.10 | a | 72.28 | a | 62.10 | 49.64 | b | 40.83 | b | 58.00 | |||||
2008 | 37.95 | a | 46.74 | b | 50.90 | b | 58.15 | c | ----- | z | ----- | z | ----- | z | 72.92 | m | 69.21 | r | 58.65 | 48.05 | 41.73 | a | 48.88 | e | ||
2009 | 41.40 | b | 48.02 | 54.60 | a | 58.58 | e | 68.13 | 76.25 | b | 77.71 | c | 77.48 | b | 67.88 | b | 56.58 | a | 48.07 | 34.47 | a | 59.10 | ||||
2010 | 37.56 | 38.76 | a | 49.48 | 58.70 | 66.36 | b | 77.92 | 76.76 | b | 77.00 | 72.93 | a | 60.13 | 46.50 | 43.37 | 58.79 | |||||||||
2011 | 38.15 | a | 41.54 | b | 55.75 | a | 62.17 | 67.05 | b | 80.43 | 81.84 | 82.98 | a | 70.68 | 60.92 | 47.78 | 33.95 | c | 60.27 | |||||||
2012 | 42.84 | 42.24 | 56.33 | b | 63.55 | b | 69.21 | 80.83 | a | 78.83 | a | 78.00 | 71.73 | 61.34 | ----- | z | ----- | z | 64.49 | b | ||||||
2013 | 39.26 | ----- | z | ----- | z | ----- | z | 65.74 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.50 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.02 | 42.08 | 48.71 | 57.55 | 66.29 | 74.93 | 77.32 | 76.11 | 69.52 | 59.10 | 47.07 | 39.21 | 57.86 | |||||||||||||
S.D. | 3.78 | 3.46 | 3.52 | 3.23 | 2.55 | 2.84 | 2.42 | 2.37 | 2.51 | 2.44 | 3.33 | 3.03 | 1.19 | |||||||||||||
SKEW | -0.40 | 0.01 | -0.26 | 0.11 | 1.13 | 0.66 | -0.17 | -0.24 | 0.50 | -0.09 | -0.32 | -0.43 | -0.08 | |||||||||||||
MAX | 45.73 | 50.12 | 56.33 | 64.00 | 74.55 | 83.12 | 83.37 | 82.98 | 78.17 | 64.95 | 54.63 | 44.27 | 60.27 | |||||||||||||
MIN | 27.82 | 32.10 | 39.74 | 49.96 | 61.82 | 69.92 | 71.42 | 69.31 | 64.78 | 52.87 | 37.75 | 32.19 | 55.06 | |||||||||||||
YRS | 69 | 69 | 68 | 68 | 67 | 69 | 65 | 68 | 67 | 67 | 65 | 65 | 47 |