YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 21.61 | s | ----- | 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 | 42.92 | m | 45.77 | d | 54.47 | b | 63.05 | 66.50 | 62.90 | 57.95 | 45.43 | d | 38.82 | b | 32.58 | 51.94 | c | |||||
1940 | 30.08 | 32.37 | b | 39.84 | 46.05 | 57.84 | 64.92 | 65.73 | a | 62.03 | 57.73 | 46.95 | 33.54 | b | 33.40 | a | 47.54 | |||||||||
1941 | 30.23 | 36.96 | 39.57 | d | 42.08 | 53.24 | 58.80 | 62.35 | 63.08 | 56.33 | f | 48.56 | g | 38.57 | 32.94 | 45.78 | b | |||||||||
1942 | 31.00 | d | 30.46 | 36.48 | b | 45.85 | 51.45 | 61.72 | 66.60 | 62.67 | b | 56.75 | f | 45.90 | b | ----- | z | 30.64 | m | 48.01 | c | |||||
1943 | 29.92 | 35.11 | 40.02 | e | 47.53 | 51.32 | 57.79 | a | 61.13 | 62.73 | 57.28 | 45.84 | 36.93 | a | 32.08 | k | 47.78 | a | ||||||||
1944 | ----- | z | 29.90 | 34.63 | a | 41.48 | 51.17 | a | 59.88 | 66.05 | 64.68 | 57.10 | 49.76 | 35.37 | 30.63 | 47.33 | a | |||||||||
1945 | 27.77 | 34.46 | a | 36.66 | 42.45 | a | ----- | z | 57.40 | a | 66.90 | b | 65.11 | 65.59 | s | ----- | z | ----- | z | ----- | z | 47.25 | e | |||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | 53.93 | q | 62.92 | 64.03 | 62.13 | 57.70 | b | 45.34 | c | 35.50 | i | 37.15 | r | 58.42 | g | |||
1947 | ----- | z | 35.04 | o | 38.17 | e | 45.25 | 55.66 | 61.32 | 66.92 | 64.02 | 58.35 | g | ----- | z | ----- | z | ----- | z | 55.22 | f | |||||
1948 | ----- | z | ----- | z | ----- | z | 51.05 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | 57.36 | x | 64.46 | r | 67.22 | h | ----- | z | ----- | z | ----- | z | 36.40 | t | ----- | z | ----- | z |
1950 | 32.33 | v | 36.03 | l | 37.30 | p | ----- | z | 51.26 | h | 61.61 | b | 65.15 | a | 61.60 | g | 54.58 | d | 53.07 | d | 40.14 | e | 34.30 | f | 54.91 | g |
1951 | 27.96 | h | 32.26 | a | 36.77 | k | 44.24 | m | 51.04 | g | 59.82 | m | 68.20 | c | 66.29 | n | 56.50 | v | 47.24 | j | 35.97 | l | 32.00 | f | 50.23 | j |
1952 | 35.08 | l | 33.92 | q | 36.38 | s | 45.23 | h | 53.09 | o | 62.14 | l | 64.66 | l | 64.39 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | 34.83 | j | 30.36 | q | 29.42 | y | ----- | z | 51.12 | e | 62.33 | 66.29 | 65.28 | o | ----- | z | 46.50 | y | 34.00 | t | 26.86 | j | 59.91 | i | ||
1954 | 27.80 | p | ----- | z | ----- | z | 48.62 | v | 54.50 | j | 59.47 | n | 68.25 | s | 64.34 | l | 60.67 | o | 49.70 | p | 39.48 | b | 31.61 | 35.55 | j | |
1955 | 27.19 | b | 29.48 | g | 37.52 | a | 44.23 | b | 51.67 | a | 59.45 | b | 65.42 | e | 64.73 | c | 57.69 | l | 50.19 | 38.67 | j | 34.28 | a | 48.30 | c | |
1956 | 33.78 | d | 25.91 | 38.94 | 43.48 | b | 54.76 | b | 65.27 | 65.32 | 62.56 | 60.73 | 48.47 | 33.60 | j | 24.79 | x | 49.92 | b | |||||||
1957 | 34.13 | 43.43 | g | 39.54 | e | 44.62 | 50.84 | 62.95 | ----- | z | 62.15 | 55.32 | 47.45 | b | 35.53 | a | 35.52 | g | 48.06 | c | ||||||
1958 | 28.00 | 37.27 | 36.50 | 45.75 | 55.84 | 64.40 | 66.45 | 65.39 | 59.62 | a | 49.12 | a | 38.05 | b | 34.75 | c | 48.43 | |||||||||
1959 | 31.63 | 32.78 | a | 37.37 | 49.02 | 53.40 | 64.25 | 67.77 | 64.92 | 55.16 | a | 49.85 | 38.37 | 31.89 | 48.03 | |||||||||||
1960 | 24.29 | 32.15 | i | 42.26 | 47.10 | 52.28 | b | 63.15 | 65.63 | a | 65.63 | 60.10 | 47.35 | 39.00 | 29.05 | 48.71 | a | |||||||||
1961 | 30.69 | 34.29 | 39.63 | 46.45 | 53.89 | 63.15 | 66.68 | 63.78 | a | 56.13 | 47.13 | 37.27 | f | 28.35 | 48.20 | a | ||||||||||
1962 | 30.30 | a | 37.55 | 33.90 | 48.38 | 52.53 | 59.88 | 66.71 | 65.94 | 60.77 | 50.27 | 41.56 | e | ----- | z | 49.80 | a | |||||||||
1963 | ----- | z | 34.60 | m | 36.89 | d | 44.65 | 53.89 | 57.59 | a | 64.72 | a | 63.15 | 59.40 | 50.02 | 37.95 | 29.03 | 49.73 | b | |||||||
1964 | 24.52 | 24.17 | 33.81 | 41.93 | 53.94 | 60.68 | 67.31 | 65.05 | 59.17 | 49.55 | 37.03 | 32.02 | 45.76 | |||||||||||||
1965 | 32.50 | e | 29.88 | d | 36.62 | k | 44.39 | c | 50.87 | 59.15 | 67.44 | 64.76 | 58.55 | 49.87 | 40.77 | 29.89 | 48.00 | a | ||||||||
1966 | 24.97 | 26.41 | 40.31 | 47.10 | 55.85 | 61.85 | 69.39 | 65.85 | 59.12 | 47.76 | 40.23 | 31.05 | 47.49 | |||||||||||||
1967 | 30.94 | 35.89 | 43.26 | 47.35 | 52.56 | 61.65 | 68.71 | 63.63 | 59.67 | a | 50.60 | 40.85 | 26.34 | 48.45 | ||||||||||||
1968 | 23.81 | 37.45 | 39.42 | 43.85 | 52.48 | 61.90 | 65.81 | 62.63 | 56.72 | 50.31 | 36.93 | a | 27.47 | 46.56 | ||||||||||||
1969 | 35.92 | 33.84 | 35.29 | 46.12 | 53.73 | 61.75 | 68.95 | 68.10 | 60.30 | 49.13 | 37.67 | 33.42 | a | 48.68 | ||||||||||||
1970 | 27.63 | 36.82 | 37.81 | 41.85 | 53.82 | 62.13 | 68.30 | a | 65.61 | 59.08 | 46.06 | 38.65 | ----- | z | 48.89 | a | ||||||||||
1971 | 29.53 | 34.05 | 40.15 | 44.42 | 50.28 | a | 61.78 | 68.48 | 64.05 | 59.02 | 47.35 | 38.19 | a | 30.52 | 47.32 | |||||||||||
1972 | 31.29 | 35.53 | 44.48 | 46.33 | 52.71 | 61.02 | 67.03 | 64.53 | 58.30 | 52.13 | 35.37 | 32.56 | 48.44 | |||||||||||||
1973 | 28.56 | 33.50 | a | 35.79 | 40.27 | 52.93 | a | 60.92 | 65.61 | 64.34 | 59.57 | 48.79 | 38.58 | d | 31.40 | 46.69 | ||||||||||
1974 | 33.90 | b | 31.38 | 42.98 | 45.25 | 55.77 | a | 65.73 | 65.60 | 63.58 | 58.38 | 50.47 | 38.12 | ----- | z | 50.10 | a | |||||||||
1975 | 28.11 | ----- | z | 38.02 | 41.09 | b | 50.12 | a | 60.13 | d | 65.93 | c | 64.54 | h | 57.69 | f | 49.29 | g | 38.63 | d | 31.26 | 44.16 | d | |||
1976 | 30.21 | e | 38.41 | f | 38.34 | l | 44.47 | m | 52.81 | d | 60.96 | c | 64.93 | b | 63.91 | b | 56.95 | k | 45.15 | h | 38.62 | i | 30.12 | k | 54.57 | g |
1977 | 27.72 | o | 33.22 | j | 36.25 | c | 45.71 | b | 51.48 | a | 63.69 | c | 66.72 | a | 66.04 | f | 60.21 | b | ----- | z | ----- | z | ----- | z | 54.01 | f |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | 29.88 | f | 31.88 | b | 38.95 | b | 46.72 | 52.53 | 60.20 | 67.37 | a | 63.53 | a | ----- | z | ----- | z | ----- | z | 31.78 | m | 51.60 | e | |||
1980 | 31.52 | g | 35.25 | e | 37.15 | 44.74 | c | 50.94 | e | 64.07 | a | 69.15 | 65.03 | a | 60.44 | e | 46.45 | b | 37.50 | g | 35.31 | j | 52.58 | c | ||
1981 | 33.58 | k | 34.83 | h | 39.57 | i | 49.20 | 54.20 | a | 65.67 | a | 68.05 | c | 64.40 | a | 59.67 | 49.80 | f | 39.50 | n | 33.63 | h | 60.20 | f | ||
1982 | 31.18 | l | 34.88 | o | 39.80 | i | 46.50 | f | 51.40 | 59.82 | 67.02 | 66.33 | a | 60.62 | b | 46.56 | f | 38.88 | d | 30.56 | m | 57.35 | f | |||
1983 | 32.67 | k | 34.00 | f | 39.32 | c | 41.72 | g | 52.60 | b | 58.78 | g | 67.29 | e | 66.88 | f | 63.58 | d | 50.83 | g | 38.63 | c | 34.73 | k | 52.28 | g |
1984 | 31.83 | j | 32.44 | c | 38.78 | b | 44.60 | e | 57.95 | 62.29 | a | 66.55 | 64.90 | 59.68 | e | 46.90 | f | 38.02 | c | 31.76 | h | 51.69 | c | |||
1985 | 30.88 | f | 32.50 | g | 40.36 | b | 48.12 | 54.85 | 64.10 | a | 68.42 | a | 65.68 | c | 57.83 | 49.08 | 39.90 | 31.95 | a | 52.03 | b | |||||
1986 | 35.43 | c | 35.37 | b | 42.31 | 48.10 | 54.53 | 63.18 | 64.79 | 66.97 | a | 56.76 | a | 46.97 | b | 39.72 | 30.44 | d | 48.71 | |||||||
1987 | 29.41 | c | 33.04 | a | 36.48 | a | 46.62 | 52.30 | a | 62.18 | b | 65.85 | e | 64.42 | 56.72 | l | 51.31 | 36.73 | 30.02 | g | 47.83 | b | ||||
1988 | 26.76 | b | 36.37 | c | 41.02 | b | 46.33 | 55.02 | a | 63.14 | b | 67.07 | a | 65.11 | d | 56.12 | 51.79 | 38.93 | 31.72 | a | 48.28 | |||||
1989 | 30.17 | j | 39.66 | i | 42.72 | b | 51.20 | 56.65 | a | 62.94 | d | 68.20 | a | 66.53 | b | 59.52 | d | 48.03 | b | 38.35 | d | 30.86 | c | 52.50 | b | |
1990 | 29.72 | d | 31.78 | a | 40.26 | b | 48.43 | c | 53.86 | b | 67.19 | c | 66.35 | a | 63.98 | e | 61.93 | h | 47.66 | c | 39.20 | h | 28.84 | b | 47.81 | b |
1991 | 32.69 | m | 38.07 | e | 36.71 | c | 44.65 | c | 53.15 | e | 58.41 | b | 65.82 | 64.75 | a | 58.93 | h | 50.08 | e | 38.52 | c | 30.84 | i | 50.02 | c | |
1992 | 23.29 | l | 35.12 | d | 40.38 | c | 48.12 | a | 53.98 | a | 59.40 | a | 65.47 | b | 64.52 | e | 59.33 | a | 50.46 | d | 32.25 | b | 27.07 | c | 48.74 | a |
1993 | 33.18 | l | 35.19 | g | 40.33 | h | 44.52 | e | 54.23 | k | 60.60 | d | 66.61 | d | 65.63 | e | 56.38 | i | 47.91 | h | 37.42 | j | 30.62 | e | 53.60 | g |
1994 | 30.52 | i | 33.34 | l | 40.74 | h | 44.88 | j | 52.88 | f | 66.90 | f | 68.46 | c | 67.57 | d | 59.17 | d | 45.74 | f | 38.17 | g | 34.32 | i | 65.07 | i |
1995 | 29.02 | f | 38.62 | c | 40.52 | f | 42.70 | j | 49.83 | d | 59.28 | a | 64.52 | g | 66.87 | d | 59.44 | f | 48.89 | q | 41.05 | k | 31.80 | k | 53.65 | h |
1996 | 31.50 | w | 38.35 | s | 39.71 | x | 48.39 | h | 58.43 | d | ----- | z | 68.39 | d | 65.47 | n | 57.40 | o | 47.28 | d | 41.83 | u | 25.92 | y | 58.03 | i |
1997 | 27.65 | r | 32.69 | t | ----- | z | 44.33 | c | 55.89 | 60.81 | d | 67.22 | d | 67.18 | q | 61.65 | m | 49.50 | x | ----- | z | ----- | z | 57.06 | h | |
1998 | 32.46 | r | 32.97 | i | 38.63 | h | 42.35 | m | 52.57 | j | 58.65 | g | 66.72 | o | ----- | z | ----- | z | ----- | z | 40.34 | n | 37.52 | k | ----- | z |
1999 | 33.39 | d | 34.44 | k | 41.53 | b | 43.62 | j | ----- | z | 60.14 | i | 70.89 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.46 | j |
2000 | ----- | z | 36.00 | v | 42.89 | v | 50.34 | k | 58.96 | e | ----- | z | 66.83 | p | ----- | z | 62.85 | m | ----- | z | 33.54 | g | ----- | z | 58.96 | k |
2001 | 29.12 | w | 33.87 | a | ----- | z | 46.70 | j | 56.61 | h | 65.60 | i | 68.24 | h | 65.42 | r | 60.53 | n | 50.95 | l | 42.02 | e | 27.11 | i | 37.95 | j |
2002 | 32.12 | o | 35.38 | k | 40.37 | l | 51.28 | n | 53.68 | n | 64.75 | r | 66.70 | k | 63.67 | p | 62.19 | v | 47.94 | v | 39.19 | v | ----- | z | ----- | z |
2003 | 38.33 | y | 30.56 | s | 41.44 | v | 45.63 | d | 54.64 | i | 62.79 | m | 71.90 | j | 67.17 | m | 60.66 | k | 54.71 | q | 45.19 | v | 33.17 | m | 45.63 | k |
2004 | 33.19 | w | 32.43 | v | 43.19 | r | 46.18 | k | 53.55 | b | 62.37 | c | 66.70 | d | 63.10 | e | 60.21 | m | 51.50 | q | 38.71 | r | 33.31 | o | 61.43 | h |
2005 | 36.75 | y | ----- | z | 38.20 | u | 45.55 | s | 56.25 | e | 61.60 | a | 68.31 | e | 66.21 | x | 60.29 | f | 50.00 | m | 43.83 | r | 32.18 | l | 62.05 | i |
2006 | 31.67 | s | 36.78 | e | 38.32 | f | 48.90 | d | 57.04 | d | 66.87 | c | 69.77 | i | 63.74 | j | 56.30 | e | 48.94 | e | 41.64 | p | 31.83 | s | 52.47 | f |
2007 | 31.52 | j | 37.32 | c | 40.48 | h | 47.68 | h | 54.60 | g | 63.98 | e | 69.76 | h | ----- | z | 57.38 | e | 51.76 | h | 45.50 | h | 32.92 | g | 52.89 | i |
2008 | 32.47 | m | 36.93 | o | 39.53 | b | 44.93 | c | 51.12 | c | 63.20 | e | 66.38 | f | 65.19 | j | 58.77 | s | ----- | z | ----- | z | ----- | z | 49.70 | h |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.86 | 33.73 | 38.83 | 45.55 | 53.58 | 61.94 | 66.63 | 64.53 | 58.57 | 48.74 | 38.23 | 30.93 | 47.72 | |||||||||||||
S.D. | 3.17 | 3.45 | 2.56 | 2.35 | 2.24 | 2.25 | 1.58 | 1.45 | 1.85 | 1.95 | 2.03 | 2.11 | 0.93 | |||||||||||||
SKEW | -0.08 | -0.98 | 0.06 | -0.12 | 0.50 | 0.11 | -0.91 | 0.29 | -0.06 | 0.07 | -0.83 | -0.36 | -0.77 | |||||||||||||
MAX | 35.92 | 38.62 | 44.48 | 51.20 | 58.96 | 67.19 | 69.39 | 68.10 | 63.58 | 53.07 | 42.02 | 34.75 | 48.71 | |||||||||||||
MIN | 23.81 | 24.17 | 33.81 | 40.27 | 49.83 | 57.40 | 61.13 | 62.03 | 54.58 | 45.34 | 32.25 | 26.34 | 45.76 | |||||||||||||
YRS | 31 | 36 | 42 | 47 | 53 | 55 | 54 | 47 | 39 | 38 | 36 | 28 | 13 |