YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | ----- | z | ----- | z | ----- | z | 51.36 | i | 55.40 | a | 55.78 | 61.45 | 60.58 | 52.10 | 49.77 | a | 41.23 | 30.27 | a | 50.82 | d | |||||
1915 | 33.37 | 38.84 | 45.11 | 49.95 | 53.48 | 56.11 | b | 60.66 | 62.66 | 55.05 | a | 47.50 | d | 36.17 | 34.18 | 47.76 | ||||||||||
1916 | 19.08 | a | 33.57 | 37.45 | 45.47 | 48.47 | 56.47 | 57.82 | 60.87 | 55.12 | 45.44 | 35.25 | b | 28.85 | 43.65 | |||||||||||
1917 | 29.44 | 30.57 | 34.52 | 42.47 | 49.57 | a | 53.33 | 59.97 | 62.63 | 55.48 | 47.52 | b | 44.52 | d | 34.10 | 45.34 | ||||||||||
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.21 | q | 42.70 | y | 32.00 | v | ----- | z |
1919 | 35.87 | d | 35.75 | d | 39.27 | c | 46.70 | e | 52.11 | c | 56.20 | o | 60.79 | j | 61.42 | g | 56.85 | t | 44.80 | i | 38.39 | k | 29.02 | b | 39.79 | f |
1920 | 34.64 | i | 36.39 | a | 39.38 | c | 42.19 | c | 46.96 | g | 55.37 | k | 62.66 | b | 61.50 | g | 52.12 | m | ----- | z | 41.02 | c | 36.69 | d | 43.05 | f |
1921 | 31.82 | f | 33.00 | m | 38.81 | 41.73 | 50.80 | h | 55.38 | i | 54.16 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.27 | j | ||
1922 | 25.53 | l | 26.14 | c | 33.43 | b | 39.78 | c | 47.12 | o | ----- | z | 71.42 | y | 61.68 | f | 52.63 | o | 43.40 | p | 32.26 | i | 22.90 | j | 33.12 | i |
1923 | 28.52 | g | 29.53 | k | 35.08 | l | 41.00 | e | 48.17 | k | 52.19 | n | ----- | z | ----- | z | 50.73 | s | 38.92 | s | 39.08 | j | ----- | z | 41.00 | k |
1924 | 27.97 | m | 37.37 | b | 36.67 | g | 42.56 | n | 51.93 | i | 52.46 | f | 58.90 | u | ----- | z | ----- | z | ----- | z | 33.11 | c | 27.48 | h | 35.24 | j |
1925 | 31.77 | c | 38.00 | p | 35.65 | k | ----- | z | 56.90 | f | 57.21 | k | ----- | z | ----- | z | 55.92 | l | ----- | z | ----- | z | ----- | z | 31.77 | k |
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 | 43.80 | c | 36.43 | i | 43.80 | k |
1935 | 29.20 | d | 38.77 | 37.38 | a | 44.37 | 51.98 | a | 57.10 | d | 61.23 | c | 60.66 | 58.31 | c | 45.08 | l | 36.38 | b | 36.22 | h | 47.54 | b | |||
1936 | 33.83 | g | 23.73 | g | 36.07 | c | 47.40 | 55.46 | c | 59.74 | c | 61.17 | b | 61.77 | 54.75 | 49.03 | 38.41 | a | 35.60 | 49.94 | b | |||||
1937 | 18.70 | c | 30.21 | 42.11 | 43.13 | 51.66 | b | 58.55 | 61.57 | b | 59.39 | 56.68 | 51.14 | b | 39.19 | a | 34.95 | a | 45.61 | |||||||
1938 | 34.76 | b | 37.12 | 39.83 | a | 48.12 | 52.70 | a | 59.39 | b | 64.27 | a | 59.62 | b | 60.38 | a | 50.07 | i | 36.33 | c | 34.09 | b | 47.87 | a | ||
1939 | 37.05 | b | 32.09 | k | 42.41 | o | 48.98 | i | 51.95 | i | 54.60 | f | 60.32 | a | 63.00 | a | 57.18 | b | 48.05 | b | 45.07 | c | 40.53 | a | 50.17 | e |
1940 | 35.61 | 38.04 | b | 44.05 | 49.98 | f | 57.56 | 61.38 | 64.94 | o | 63.05 | 62.50 | e | 51.29 | 37.45 | 36.90 | 48.78 | b | ||||||||
1941 | 36.98 | 41.98 | 48.15 | 50.17 | 52.52 | a | 59.30 | o | 73.13 | l | ----- | z | ----- | z | 64.64 | x | ----- | z | ----- | z | 45.96 | g | ||||
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.95 | a | 57.67 | a | 49.80 | c | 35.41 | c | 31.31 | 48.23 | g | |
1943 | 24.77 | 38.63 | a | 38.27 | 49.07 | 49.92 | 55.52 | 61.48 | f | 60.05 | 57.15 | 53.28 | v | ----- | z | 31.44 | e | 44.98 | c | |||||||
1944 | 33.71 | c | 34.73 | e | 38.94 | 47.98 | 50.66 | c | 56.90 | i | 62.52 | f | 59.92 | 57.02 | 50.26 | 39.60 | d | 32.62 | j | 45.87 | c | |||||
1945 | 33.68 | c | 37.12 | 39.02 | d | 42.65 | c | 53.28 | b | 56.11 | b | 62.57 | h | 63.20 | i | ----- | z | ----- | z | ----- | z | ----- | z | 43.64 | f | |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.89 | i | 34.00 | l | ----- | z | ----- | z |
1947 | ----- | z | 38.75 | p | 44.38 | j | 49.47 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.42 | g | ----- | z | 35.50 | n | ----- | z |
1948 | 32.17 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | 46.62 | v | 56.14 | q | 57.02 | h | 60.69 | g | 62.12 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | 14.32 | a | 32.98 | 36.91 | b | 43.30 | 49.59 | b | 60.60 | e | 62.52 | a | 61.55 | a | 56.98 | f | 43.91 | o | 37.73 | j | 36.95 | l | 45.22 | d | ||
1951 | 29.80 | d | 34.59 | e | 35.69 | 49.13 | 53.03 | a | 58.54 | e | 64.07 | a | 61.02 | 57.87 | c | 44.42 | r | 36.00 | n | 31.48 | k | 49.30 | c | |||
1952 | 27.46 | e | 34.42 | i | 38.05 | l | 48.50 | d | 54.43 | a | 55.66 | h | 61.95 | 62.13 | a | ----- | z | 49.67 | h | 38.75 | t | 34.87 | p | 50.90 | g | |
1953 | 36.69 | j | 36.61 | 40.52 | 46.52 | a | 52.82 | a | 52.90 | a | 62.04 | c | 61.08 | 55.56 | d | 48.35 | g | 41.26 | g | 37.05 | a | 49.45 | c | |||
1954 | 26.74 | b | 36.11 | a | 37.87 | 42.40 | 52.46 | r | 55.42 | k | 59.69 | 58.45 | 55.18 | 46.35 | 43.61 | b | 35.56 | 44.20 | b | |||||||
1955 | 33.45 | 32.62 | 33.78 | a | 42.22 | 46.73 | 56.77 | 59.70 | a | 61.03 | b | 54.76 | c | ----- | z | 31.76 | m | 30.29 | c | 45.13 | b | |||||
1956 | 31.25 | a | 31.77 | a | 36.44 | 48.00 | 57.48 | g | 56.50 | i | 64.12 | a | 63.25 | c | 56.71 | i | 43.97 | l | 37.58 | j | 30.38 | s | 45.80 | f | ||
1957 | ----- | z | 33.97 | m | 40.52 | 47.72 | 57.03 | a | 57.89 | p | 57.45 | b | 59.60 | 60.66 | b | 46.59 | b | 39.90 | 36.87 | 49.59 | c | |||||
1958 | 38.52 | 42.04 | a | 41.66 | 47.70 | c | 58.90 | 64.96 | b | 71.07 | d | 65.74 | 54.87 | 49.08 | 35.73 | b | 38.00 | f | 51.84 | a | ||||||
1959 | 34.08 | 35.76 | c | 40.13 | a | 46.28 | 52.79 | c | 58.14 | a | 64.77 | a | 59.54 | d | 54.50 | b | 46.67 | e | 37.06 | f | 35.56 | e | 48.02 | a | ||
1960 | 29.75 | c | 35.62 | c | 40.17 | a | 46.55 | b | 49.56 | e | 56.95 | 66.32 | 61.07 | a | 56.72 | c | 50.04 | e | 38.28 | a | 33.98 | b | 47.08 | |||
1961 | 44.10 | k | 39.70 | f | 42.79 | ----- | z | 54.32 | f | 63.20 | 66.40 | 68.02 | c | 54.19 | c | 45.92 | 35.65 | 34.28 | b | 51.31 | d | |||||
1962 | 32.79 | c | 36.26 | c | 38.07 | d | 48.52 | 50.22 | d | 58.48 | 61.79 | 60.65 | 56.77 | 48.60 | a | 43.00 | c | 38.68 | 47.82 | |||||||
1963 | 29.26 | 39.20 | c | 40.30 | d | 45.53 | 54.36 | c | 58.88 | a | 61.32 | a | 63.48 | d | ----- | z | ----- | z | ----- | z | ----- | z | 49.04 | d | ||
1964 | ----- | z | ----- | z | 42.14 | x | ----- | z | ----- | z | 57.02 | e | 61.35 | 59.32 | a | 55.36 | e | ----- | z | ----- | z | ----- | z | 58.26 | h | |
1965 | ----- | z | ----- | z | 40.73 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.17 | d | 50.70 | k | 41.50 | k | ----- | z | 47.95 | j | |
1966 | ----- | z | ----- | z | 40.63 | a | 46.60 | d | 54.95 | c | 56.62 | 60.57 | b | 62.84 | 59.27 | 47.94 | 41.40 | a | 37.47 | 50.83 | b | |||||
1967 | 35.90 | 39.30 | 38.15 | 44.28 | 53.45 | 62.73 | 63.84 | 68.28 | a | 62.98 | 50.37 | e | 42.69 | f | 31.92 | l | 51.93 | b | ||||||||
1968 | 33.02 | h | 41.59 | 44.61 | d | 45.67 | 53.19 | b | 58.30 | 64.18 | 60.98 | 57.38 | b | ----- | z | ----- | z | ----- | z | 53.24 | d | |||||
1969 | 22.27 | 35.55 | 41.70 | c | ----- | z | 60.38 | k | 64.12 | d | 62.29 | b | 60.82 | 57.80 | c | 47.88 | a | 43.07 | g | 35.81 | e | 47.58 | c | |||
1970 | 30.34 | f | 40.48 | c | 40.73 | 42.95 | 51.17 | a | 61.98 | b | 63.53 | a | 63.48 | a | 54.91 | b | 47.58 | 39.35 | 33.92 | k | 50.62 | b | ||||
1971 | 29.98 | f | 35.60 | b | 38.36 | c | 47.07 | 54.91 | b | 55.07 | a | 63.97 | 66.06 | 54.52 | b | 47.52 | f | 41.78 | 32.76 | 49.01 | b | |||||
1972 | 30.61 | 36.92 | d | 41.77 | 41.50 | d | 55.18 | n | 57.71 | a | 62.98 | a | 64.83 | b | 54.23 | h | 52.17 | s | 39.76 | g | 28.75 | a | 45.63 | d | ||
1973 | 31.39 | 38.05 | 41.56 | ----- | z | ----- | z | 56.40 | a | 60.52 | i | 59.11 | 56.26 | a | 44.79 | 34.52 | 36.52 | 44.29 | c | |||||||
1974 | 30.02 | a | 37.28 | a | 39.42 | 45.50 | d | 49.64 | b | 57.70 | g | 64.50 | q | 64.21 | ----- | z | ----- | z | ----- | z | ----- | z | 44.34 | f | ||
1975 | 31.81 | g | 31.50 | 37.47 | a | 40.58 | q | ----- | z | 55.04 | q | 64.65 | a | 58.27 | 58.69 | d | 45.77 | 37.71 | a | 32.17 | b | 45.78 | d | |||
1976 | 33.87 | a | 34.98 | a | 35.98 | b | 43.86 | a | 50.65 | a | 53.03 | 59.50 | a | 57.84 | 57.41 | a | 48.17 | a | 40.16 | b | 35.98 | 45.95 | ||||
1977 | 30.05 | 40.20 | 38.77 | 48.15 | f | 48.13 | a | 58.62 | 59.89 | c | 65.48 | a | 54.20 | b | 45.34 | c | 35.13 | 29.73 | a | 45.96 | a | |||||
1978 | 32.89 | d | 37.15 | b | 42.23 | 46.17 | 49.60 | 58.75 | 62.95 | c | 60.93 | a | 53.83 | ----- | z | ----- | z | 33.12 | r | 49.39 | c | |||||
1979 | ----- | z | 34.19 | o | 43.91 | h | 46.07 | g | 52.26 | l | 56.24 | a | 63.80 | d | 63.44 | 56.57 | h | 52.25 | o | 36.64 | h | 38.57 | p | 61.16 | i | |
1980 | 27.07 | h | 38.00 | i | 38.60 | e | 50.55 | k | 52.74 | j | 57.84 | n | ----- | z | ----- | z | ----- | z | 49.56 | f | 42.24 | i | 38.00 | i | 38.60 | k |
1981 | 38.32 | i | 38.25 | d | 42.02 | c | 44.25 | f | 52.32 | c | 53.62 | a | 61.13 | h | 64.78 | d | 56.15 | 44.83 | a | 42.18 | 35.85 | 47.78 | c | |||
1982 | 29.59 | d | 35.20 | c | 39.37 | a | 43.95 | 51.98 | c | 61.28 | 60.39 | c | 59.47 | b | 57.54 | f | 48.78 | b | 34.71 | d | 34.12 | e | 45.35 | a | ||
1983 | 38.88 | n | 40.33 | j | 44.58 | l | 45.97 | k | 57.82 | l | 53.98 | i | 59.57 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.57 | k |
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 | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.53 | 36.27 | 39.54 | 45.44 | 52.34 | 58.07 | 62.25 | 62.00 | 56.61 | 47.94 | 38.87 | 34.17 | 46.17 | |||||||||||||
S.D. | 5.47 | 3.34 | 2.92 | 2.73 | 2.72 | 3.03 | 2.56 | 2.59 | 2.36 | 1.92 | 3.35 | 3.04 | 1.50 | |||||||||||||
SKEW | -1.21 | -0.68 | 0.35 | -0.16 | 0.28 | 0.41 | 0.92 | 0.68 | 0.91 | -0.00 | 0.20 | -0.25 | -0.41 | |||||||||||||
MAX | 38.52 | 42.04 | 48.15 | 50.17 | 58.90 | 64.96 | 71.07 | 68.28 | 62.98 | 51.29 | 45.07 | 40.53 | 47.82 | |||||||||||||
MIN | 14.32 | 26.14 | 33.43 | 39.78 | 46.73 | 52.90 | 57.45 | 57.84 | 52.10 | 44.79 | 33.11 | 28.75 | 43.65 | |||||||||||||
YRS | 34 | 40 | 46 | 39 | 36 | 36 | 39 | 44 | 37 | 27 | 30 | 31 | 7 |