YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 49.26 | 65.83 | 70.81 | e | 69.13 | 68.47 | 55.61 | 43.93 | 36.67 | a | 57.46 | d | ||||||
1918 | 32.72 | b | 39.11 | 47.62 | b | 48.40 | 52.06 | 70.47 | 72.33 | a | 68.32 | 65.63 | 55.71 | 43.10 | a | 36.68 | 52.68 | |||||||||
1919 | 34.74 | 35.64 | 39.48 | 49.73 | 54.77 | 64.70 | 70.03 | 69.90 | 64.03 | 50.10 | 41.13 | 40.71 | 51.25 | |||||||||||||
1920 | 39.45 | 42.31 | 41.74 | 45.57 | 53.71 | ----- | z | 85.00 | w | 68.87 | a | 64.92 | d | 50.90 | k | 43.86 | a | 33.19 | e | 48.18 | c | |||||
1921 | 37.00 | d | 39.67 | g | 46.32 | 46.87 | 52.77 | 63.13 | 72.13 | a | 69.54 | c | 71.45 | a | 68.57 | h | 45.30 | 43.90 | 54.84 | b | ||||||
1922 | 39.55 | 43.68 | 45.19 | 51.60 | 58.06 | 68.13 | 77.81 | 73.71 | ----- | z | 54.71 | 40.03 | 39.81 | 53.84 | a | |||||||||||
1923 | 40.81 | 39.36 | 41.23 | 47.40 | 56.19 | 59.27 | 70.71 | 69.58 | 62.40 | 48.48 | 44.17 | 37.97 | a | 51.46 | ||||||||||||
1924 | 33.04 | e | 37.91 | g | 38.42 | 46.29 | f | 55.90 | j | 65.48 | e | 69.05 | i | 67.95 | k | 63.09 | g | 48.25 | s | ----- | z | ----- | z | 45.65 | i | |
1925 | 28.18 | n | 37.47 | k | 40.50 | g | 44.39 | g | 52.81 | j | 61.30 | t | 67.72 | f | 64.82 | i | ----- | z | ----- | z | ----- | z | 32.25 | s | ----- | 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 | 42.80 | 43.77 | 43.29 | j | ||
1941 | 40.39 | 45.21 | 44.90 | 46.10 | 56.06 | 60.40 | 70.58 | 69.65 | 62.37 | 51.42 | 45.93 | 38.26 | 52.61 | |||||||||||||
1942 | 37.55 | 37.68 | 39.61 | 46.60 | 52.26 | 61.80 | 72.03 | 69.74 | 64.73 | 53.84 | 44.73 | 39.90 | 51.71 | |||||||||||||
1943 | 39.71 | 42.18 | 44.16 | 50.63 | 54.00 | 64.57 | 73.33 | a | 74.68 | c | 65.31 | a | 50.61 | 39.80 | 37.86 | c | 53.07 | |||||||||
1944 | 33.90 | 35.14 | a | 39.06 | 44.23 | 53.29 | 58.87 | 68.97 | 70.55 | 61.36 | s | 56.00 | 42.53 | 36.65 | 49.02 | a | ||||||||||
1945 | 35.77 | 38.93 | 39.07 | b | 46.03 | ----- | z | ----- | z | ----- | z | 70.23 | 64.53 | 54.39 | 38.40 | 32.87 | 46.69 | c | ||||||||
1946 | 35.29 | 34.43 | 42.74 | 54.12 | v | 51.81 | 63.30 | 67.81 | 70.45 | 66.67 | 49.03 | 37.83 | 38.23 | 50.69 | a | |||||||||||
1947 | 35.10 | 39.71 | 42.00 | 50.00 | 57.87 | 62.20 | 73.10 | 69.68 | 67.27 | 54.29 | 39.90 | 34.68 | 52.15 | |||||||||||||
1948 | 33.68 | 37.36 | a | 40.81 | 49.77 | 54.16 | 61.67 | 71.13 | a | 72.25 | g | 68.30 | c | 58.94 | 39.17 | 38.53 | a | 50.32 | a | |||||||
1949 | 31.75 | c | 36.12 | c | 42.83 | b | 49.20 | 55.64 | c | 67.60 | 74.00 | 72.19 | 71.83 | 54.87 | 49.10 | 37.68 | 53.57 | |||||||||
1950 | 36.58 | 42.21 | 44.61 | 52.73 | 53.23 | 63.00 | 71.97 | 71.39 | 64.13 | 61.61 | 48.41 | a | 41.94 | 54.32 | ||||||||||||
1951 | 37.19 | 40.25 | 42.71 | 50.40 | 56.03 | 63.05 | i | 73.16 | 72.93 | a | 68.57 | 59.32 | 47.07 | a | 38.35 | 53.27 | a | |||||||||
1952 | 37.03 | 37.15 | b | 39.10 | 50.40 | 59.10 | 66.03 | 72.68 | 72.71 | 69.57 | 59.97 | 43.50 | 36.52 | 53.65 | ||||||||||||
1953 | 40.33 | a | 35.79 | 44.48 | 48.83 | 52.13 | 64.61 | g | 74.06 | 71.35 | 65.63 | 55.65 | 46.33 | 34.65 | 51.75 | a | ||||||||||
1954 | 37.00 | a | 45.14 | 44.97 | 52.90 | 58.23 | 64.80 | 73.74 | 69.39 | 67.70 | 56.03 | b | 45.97 | a | 36.60 | a | 54.37 | |||||||||
1955 | 33.58 | 32.46 | 43.35 | 48.09 | g | 54.52 | 64.54 | b | 68.34 | b | 68.10 | 62.54 | b | 55.55 | 40.37 | 34.90 | a | 50.75 | a | |||||||
1956 | 37.33 | d | 37.00 | g | 43.65 | 48.28 | a | 57.06 | 67.10 | 68.25 | c | 65.93 | a | 64.55 | a | 50.90 | 39.74 | c | 38.69 | b | 52.86 | a | ||||
1957 | 44.71 | g | 47.24 | c | 46.00 | a | 48.23 | 53.81 | 68.60 | 74.90 | 72.65 | 66.04 | c | 56.50 | e | 43.25 | b | 41.68 | 56.26 | a | ||||||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 38.29 | 38.04 | 43.72 | b | 53.40 | 53.52 | b | 69.30 | 74.00 | b | 70.39 | c | 63.96 | b | 55.37 | a | 45.22 | c | 39.18 | c | 53.70 | |||||
1960 | 33.27 | e | 34.11 | j | 44.43 | h | 48.25 | j | 54.20 | f | 66.92 | f | 72.07 | b | 71.27 | e | 65.44 | c | 55.16 | 47.11 | c | 35.19 | 54.22 | e | ||
1961 | 39.83 | a | 38.86 | 43.81 | 49.80 | 52.06 | 67.00 | a | 69.87 | 65.48 | 59.27 | 48.23 | 40.53 | o | 39.48 | 52.15 | a | |||||||||
1962 | 36.55 | 41.96 | 39.45 | 54.20 | 62.33 | s | 65.18 | h | 72.00 | 73.52 | 68.33 | 54.53 | a | 44.50 | f | 40.79 | b | 53.48 | c | |||||||
1963 | 33.33 | a | 43.14 | 41.64 | c | 46.76 | e | 58.46 | c | 61.50 | b | 73.13 | a | 70.36 | c | 67.10 | j | 58.09 | h | 42.12 | m | ----- | z | 53.54 | d | |
1964 | 28.57 | h | 29.48 | f | 38.71 | g | 46.83 | f | 53.58 | g | 65.03 | a | 71.17 | b | 67.96 | f | 62.40 | e | 56.63 | d | 36.91 | g | 36.41 | i | 63.81 | h |
1965 | 35.50 | i | 34.52 | g | 36.56 | f | 45.52 | g | 48.48 | j | 54.35 | j | 67.32 | i | 66.62 | j | 62.52 | i | 57.53 | l | 48.09 | h | 39.41 | d | 39.41 | k |
1966 | 32.05 | j | 34.79 | d | 44.42 | e | 49.30 | c | 55.79 | g | 62.46 | d | 70.72 | b | 69.79 | g | 64.62 | d | 50.21 | c | 43.35 | g | 34.12 | e | 51.33 | d |
1967 | 32.82 | i | 36.59 | f | 43.04 | g | 41.33 | l | 52.96 | g | 59.60 | 68.70 | h | 66.85 | d | 61.15 | c | 51.58 | e | 43.46 | b | 30.90 | 52.26 | f | ||
1968 | 34.00 | 37.97 | 41.58 | 47.96 | b | 55.13 | 65.83 | 70.48 | 66.52 | 63.39 | b | 51.65 | 41.12 | d | 31.19 | 50.57 | ||||||||||
1969 | 39.21 | b | 35.96 | 38.00 | e | 47.46 | d | 58.10 | 62.29 | p | 72.00 | h | 71.20 | k | 64.35 | m | 49.29 | j | 41.00 | m | 38.06 | m | 43.75 | g | ||
1970 | 31.80 | k | 38.78 | j | 38.00 | j | 40.67 | i | 50.75 | k | 60.42 | k | 68.91 | i | 66.00 | k | 57.16 | k | 43.86 | i | 36.72 | l | 31.18 | i | ----- | z |
1971 | 26.40 | k | 32.12 | k | 35.86 | j | 38.36 | h | 45.11 | l | 54.43 | g | 64.22 | h | 59.00 | i | 53.95 | k | 39.71 | n | 31.05 | j | 24.50 | k | ----- | z |
1972 | 22.10 | k | 27.37 | j | 36.81 | j | 48.63 | k | 54.28 | m | 66.55 | h | 72.84 | l | 70.26 | h | 64.35 | j | 58.00 | o | 41.05 | k | 33.17 | s | ----- | z |
1973 | 33.87 | p | 39.83 | j | 38.48 | f | 44.93 | c | 56.70 | d | 66.27 | d | 70.89 | c | 70.38 | e | 62.77 | d | 54.23 | i | 43.32 | b | 38.00 | p | 59.32 | e |
1974 | 37.26 | h | 35.96 | a | 42.62 | o | 49.30 | j | 55.71 | 69.50 | f | 68.41 | n | 71.27 | i | 65.40 | o | 57.48 | j | 43.42 | k | 32.41 | i | 45.84 | j | |
1975 | 35.04 | h | 34.14 | f | 41.57 | h | 43.37 | 54.25 | c | 63.69 | n | 72.59 | n | 70.29 | j | 66.00 | w | ----- | z | ----- | z | ----- | z | 48.81 | j | |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.83 | a | 35.83 | k |
1999 | 36.90 | a | 40.63 | a | 43.50 | a | 46.17 | a | 55.63 | a | 66.50 | d | 72.30 | a | 71.97 | b | 67.60 | e | 56.46 | e | 46.67 | 36.91 | h | 54.94 | a | |
2000 | 39.17 | b | 42.58 | e | 44.38 | e | 52.28 | a | 59.79 | c | 69.62 | a | 74.04 | h | 72.10 | j | 68.38 | f | 56.54 | g | 38.28 | e | 36.80 | f | 49.44 | e |
2001 | 35.78 | h | 38.42 | d | 42.58 | l | 49.95 | h | 59.14 | j | 67.28 | e | 73.71 | g | 72.91 | h | 68.36 | e | 57.55 | 49.54 | f | 35.83 | a | 53.49 | g | |
2002 | 37.86 | c | 40.55 | h | 42.67 | d | 53.52 | c | 55.46 | g | 68.12 | e | 74.77 | e | 74.28 | f | 69.18 | b | 54.22 | h | 44.68 | e | 36.67 | g | 55.83 | e |
2003 | 42.52 | f | 42.60 | c | 46.74 | h | 47.85 | c | 59.90 | b | 65.43 | i | 71.65 | k | 69.09 | i | 61.60 | y | 61.50 | i | 45.36 | e | 39.28 | f | 48.93 | h |
2004 | 38.83 | g | 37.11 | b | 50.67 | m | 51.75 | f | 60.81 | j | 64.77 | d | 72.84 | f | 69.41 | i | 64.94 | l | 54.78 | h | 41.81 | d | 36.59 | i | 47.90 | i |
2005 | 40.79 | l | 43.33 | g | 44.11 | d | 49.27 | h | 58.35 | e | 65.64 | h | 73.92 | g | 70.67 | d | 68.62 | f | 57.15 | e | 46.14 | b | 38.11 | c | 52.42 | f |
2006 | 36.83 | a | 38.16 | c | 41.48 | d | 50.77 | d | 60.42 | e | 72.40 | e | 76.08 | g | 70.44 | d | 61.14 | i | 55.44 | f | 46.52 | c | 36.38 | g | 52.13 | d |
2007 | 36.26 | d | 41.04 | b | 47.15 | d | 51.46 | f | 60.64 | i | 67.83 | f | 74.20 | f | 71.60 | k | 64.00 | e | 55.42 | g | 49.96 | c | 34.64 | c | 45.51 | f |
2008 | 35.42 | g | 39.22 | k | 43.75 | c | 48.00 | b | 51.62 | j | 62.00 | v | ----- | z | 70.94 | o | ----- | z | 54.00 | m | 47.79 | a | 39.84 | 44.85 | h | |
2009 | 41.97 | b | 42.85 | b | 48.03 | 54.39 | b | 60.85 | d | 65.90 | 76.73 | a | 75.87 | 69.34 | a | 55.65 | 48.69 | a | 38.14 | x | 58.21 | a | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.75 | 39.38 | 42.87 | 49.03 | 55.54 | 65.09 | 72.06 | 70.41 | 65.73 | 54.52 | 43.81 | 37.50 | 52.70 | |||||||||||||
S.D. | 2.64 | 3.44 | 2.59 | 2.83 | 2.81 | 3.23 | 2.26 | 2.32 | 2.90 | 3.31 | 3.23 | 3.08 | 1.21 | |||||||||||||
SKEW | -0.02 | 0.22 | -0.08 | 0.14 | 0.07 | -0.02 | 0.32 | 0.03 | 0.11 | -0.16 | -0.12 | -0.07 | -0.21 | |||||||||||||
MAX | 41.97 | 47.24 | 48.03 | 54.39 | 60.85 | 72.40 | 77.81 | 75.87 | 71.83 | 61.61 | 49.96 | 43.90 | 54.37 | |||||||||||||
MIN | 31.75 | 32.46 | 38.00 | 43.37 | 49.26 | 58.87 | 67.81 | 65.48 | 59.27 | 48.23 | 37.83 | 30.90 | 50.57 | |||||||||||||
YRS | 36 | 37 | 39 | 37 | 37 | 36 | 34 | 35 | 36 | 34 | 40 | 38 | 13 |