YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 67.08 | s | 62.77 | 57.20 | a | 59.98 | j | |
1941 | 55.95 | j | 59.04 | c | 64.97 | 67.24 | a | 76.52 | 82.27 | 96.97 | b | 90.35 | 86.18 | b | 76.35 | 65.70 | 55.29 | 74.63 | a | |||||||
1942 | 55.97 | 59.25 | 65.39 | 72.56 | e | 81.16 | l | 88.03 | 100.10 | 94.87 | 89.20 | 78.35 | 63.07 | 59.10 | 75.08 | a | ||||||||||
1943 | ----- | z | ----- | z | 65.77 | ----- | z | 81.39 | 80.90 | 93.52 | 91.48 | 91.90 | 74.35 | 66.00 | 56.61 | 77.99 | c | |||||||||
1944 | 52.97 | 57.41 | 67.87 | 65.07 | 77.42 | 82.14 | a | 94.19 | 93.58 | 90.57 | 77.65 | 58.57 | 55.61 | 72.75 | ||||||||||||
1945 | 56.39 | 61.14 | 58.00 | 73.13 | 73.61 | 87.37 | 96.16 | 91.45 | 91.23 | 77.32 | 59.37 | 52.68 | 73.15 | |||||||||||||
1946 | 55.13 | 55.50 | 61.94 | 71.40 | 78.37 | a | 81.48 | a | 91.23 | 94.68 | 87.00 | 73.19 | 60.50 | 55.42 | 72.15 | |||||||||||
1947 | 56.42 | 62.57 | 65.87 | 74.90 | 83.81 | 81.80 | 86.94 | 89.32 | 90.63 | 72.39 | 62.93 | 54.74 | 73.53 | |||||||||||||
1948 | 58.87 | 56.97 | 59.26 | 61.27 | 71.03 | 84.27 | 90.61 | 90.97 | 86.50 | 77.97 | 62.63 | 48.39 | 70.73 | |||||||||||||
1949 | 48.94 | 53.25 | 56.60 | a | 74.67 | 75.45 | b | 87.63 | 91.52 | 88.16 | 86.43 | 73.90 | 65.83 | 52.81 | 71.27 | |||||||||||
1950 | 42.90 | 53.75 | 58.13 | a | 67.24 | a | 77.94 | 83.50 | 96.48 | 93.94 | 85.10 | 72.60 | a | 65.23 | 53.71 | 70.88 | ||||||||||
1951 | 48.47 | a | 51.57 | 59.29 | 69.57 | 75.61 | 87.43 | 92.35 | 92.13 | 89.60 | 73.97 | 58.23 | 46.21 | c | 70.37 | |||||||||||
1952 | 43.27 | a | 49.90 | 53.17 | a | 69.27 | 78.39 | 78.20 | 95.23 | 93.00 | 89.07 | 81.23 | a | 56.60 | 46.71 | 69.50 | ||||||||||
1953 | 51.20 | a | 56.68 | 57.26 | 64.73 | 66.77 | 74.73 | 94.23 | 87.84 | 89.90 | a | 73.16 | 58.50 | ----- | z | 70.45 | a | |||||||||
1954 | 50.39 | m | 63.96 | 59.00 | a | 71.57 | 81.17 | a | 81.27 | 92.39 | 86.37 | a | 84.17 | 74.23 | a | 61.29 | i | 53.48 | 74.76 | b | ||||||
1955 | 51.81 | 57.39 | 63.97 | 61.70 | 77.45 | 85.97 | a | 88.39 | 95.43 | a | 89.24 | a | 76.70 | a | 61.43 | b | 53.41 | b | 71.91 | |||||||
1956 | 49.90 | 56.00 | b | 65.37 | a | 69.57 | 76.16 | 85.03 | a | 90.43 | a | 89.43 | a | 84.57 | 73.30 | a | ----- | z | 56.68 | 72.40 | a | |||||
1957 | 50.03 | a | 57.82 | 60.77 | 70.53 | 73.71 | 88.07 | ----- | z | 89.55 | 85.43 | 67.73 | a | 60.17 | 54.43 | a | 68.93 | a | ||||||||
1958 | 53.35 | 56.19 | a | 56.65 | 68.47 | 79.71 | 82.00 | 92.19 | 95.16 | 88.03 | a | 80.35 | 63.57 | 60.03 | a | 72.98 | ||||||||||
1959 | ----- | z | 56.89 | 68.94 | 77.47 | 76.45 | 87.90 | 96.93 | a | 93.00 | 84.46 | b | 81.23 | 71.10 | a | 57.16 | 77.41 | a | ||||||||
1960 | 50.90 | 57.59 | 65.71 | 67.69 | a | 74.40 | a | 92.03 | 97.43 | a | 94.04 | c | 90.66 | a | 75.37 | a | 59.97 | 57.13 | 73.58 | |||||||
1961 | 58.65 | 59.74 | a | 59.77 | 71.37 | 70.29 | 89.76 | a | 94.65 | 92.77 | 84.60 | 76.13 | 62.63 | 54.16 | 72.88 | |||||||||||
1962 | 58.42 | 55.54 | 58.19 | 75.03 | 73.10 | 86.60 | 94.00 | 90.77 | 87.52 | a | 74.03 | 63.57 | 56.03 | 72.73 | ||||||||||||
1963 | 55.39 | 63.39 | 60.03 | 60.00 | 76.52 | 87.17 | 93.13 | 94.16 | 88.53 | 72.77 | 57.90 | 54.74 | 71.98 | |||||||||||||
1964 | 51.58 | 63.31 | 62.58 | 71.73 | 77.00 | 85.17 | 96.84 | 97.55 | 88.37 | 79.65 | 55.93 | 53.03 | 73.56 | |||||||||||||
1965 | 54.52 | 61.64 | 64.35 | 66.77 | 78.90 | 86.03 | 96.19 | 92.71 | 84.73 | 80.68 | 59.13 | 50.13 | 72.98 | |||||||||||||
1966 | 53.39 | 55.04 | 63.42 | 76.30 | 83.45 | 88.83 | 94.39 | 98.29 | 89.07 | 78.84 | 61.40 | 53.87 | 74.69 | |||||||||||||
1967 | 53.87 | 62.71 | 58.74 | 55.57 | 79.13 | 85.83 | 98.77 | 100.61 | 91.30 | 76.52 | 64.43 | 52.81 | 73.36 | |||||||||||||
1968 | 52.84 | 60.10 | 65.61 | 73.50 | 78.19 | 92.00 | 99.42 | 89.32 | 89.57 | 74.42 | 58.93 | 48.45 | 73.53 | |||||||||||||
1969 | 49.48 | 49.18 | 64.29 | 68.70 | 82.71 | 84.27 | 98.84 | 98.26 | 91.10 | 71.32 | 64.30 | 56.13 | 73.21 | |||||||||||||
1970 | 53.71 | 61.32 | 65.81 | 67.40 | 82.74 | 90.07 | 99.03 | 96.97 | 89.53 | 75.81 | 59.70 | 49.42 | 74.29 | |||||||||||||
1971 | 55.81 | 62.39 | 61.19 | 67.57 | 73.87 | 86.87 | 98.35 | 97.45 | 87.37 | 73.42 | 61.03 | 48.94 | 72.85 | |||||||||||||
1972 | 53.58 | 57.69 | 68.52 | 68.10 | 81.00 | 90.23 | 96.16 | 95.87 | 84.33 | 69.97 | 58.40 | 49.10 | 72.75 | |||||||||||||
1973 | 49.81 | 55.89 | 59.84 | 74.03 | 85.29 | 90.43 | 97.35 | 94.29 | 86.47 | 74.45 | 55.83 | 53.48 | 73.10 | |||||||||||||
1974 | 52.52 | 57.54 | 61.32 | 68.27 | 79.61 | 89.53 | 92.55 | 94.84 | 93.60 | 77.90 | 61.70 | 55.03 | 73.70 | |||||||||||||
1975 | 56.29 | 55.54 | 59.58 | 61.90 | 80.97 | 88.60 | 93.03 | a | 91.81 | 91.20 | 70.48 | 58.80 | 57.10 | 72.11 | ||||||||||||
1976 | 57.68 | 58.41 | 63.39 | 66.33 | 82.81 | 87.80 | 94.97 | 86.29 | 86.07 | 79.06 | 67.37 | 59.00 | 74.10 | |||||||||||||
1977 | 55.00 | 64.18 | 61.16 | 75.57 | 69.61 | 92.50 | 96.86 | b | 96.84 | 83.60 | 75.81 | 62.13 | 54.97 | 74.02 | ||||||||||||
1978 | 54.77 | 58.21 | 65.03 | 64.80 | 78.81 | 85.47 | 96.32 | 94.84 | 81.83 | 81.32 | 61.17 | 52.48 | 72.92 | |||||||||||||
1979 | 51.66 | b | 54.82 | 63.10 | 68.00 | a | 80.68 | 90.40 | 95.74 | 92.06 | 91.30 | 74.58 | 59.63 | 56.29 | 73.19 | |||||||||||
1980 | 55.68 | 58.00 | a | 63.00 | 70.93 | 77.58 | 82.47 | 96.10 | 94.87 | 88.03 | 79.42 | 64.33 | 56.90 | 73.94 | ||||||||||||
1981 | 56.65 | 60.57 | 62.87 | 72.93 | 79.68 | 92.60 | 98.35 | 97.65 | 89.57 | 71.71 | 61.03 | 56.42 | 75.00 | |||||||||||||
1982 | 52.77 | e | 59.59 | a | 58.90 | 66.10 | 84.41 | d | 86.33 | 93.61 | c | 92.81 | e | 83.62 | d | 73.57 | h | 56.37 | 54.54 | e | 71.73 | a | ||||
1983 | ----- | z | ----- | z | ----- | z | 61.03 | 76.32 | 81.97 | 84.45 | 87.97 | 86.31 | a | 76.83 | a | 58.80 | 53.13 | 74.09 | c | |||||||
1984 | 59.48 | 57.86 | 67.26 | 66.40 | ----- | z | 87.47 | o | 96.45 | ----- | z | 89.03 | 68.97 | 57.57 | 52.61 | 68.40 | c | |||||||||
1985 | 56.81 | ----- | z | 60.38 | b | 74.73 | ----- | z | 90.10 | a | 95.42 | ----- | z | 79.64 | e | ----- | z | 55.28 | a | 55.87 | 71.03 | d | ||||
1986 | ----- | z | 58.79 | 67.74 | 68.41 | a | ----- | z | 86.07 | 91.81 | 95.68 | 77.93 | a | 78.45 | 68.30 | 55.23 | 74.84 | b | ||||||||
1987 | 53.60 | a | 59.25 | 60.13 | 76.93 | 81.42 | 88.97 | 87.27 | a | 94.84 | 89.53 | ----- | z | 62.60 | ----- | z | 75.45 | b | ||||||||
1988 | ----- | z | 66.62 | 68.94 | 69.20 | ----- | z | 82.10 | ----- | z | 94.13 | a | ----- | z | ----- | z | 59.76 | e | 57.87 | h | 73.46 | f | ||||
1989 | 55.24 | j | 54.00 | h | 61.30 | h | 73.80 | j | 74.73 | i | 85.19 | i | 92.25 | k | 87.87 | h | 84.62 | i | ----- | z | 67.06 | n | 58.75 | k | ----- | z |
1990 | 57.05 | i | 55.56 | j | 65.50 | i | 74.62 | i | 73.55 | i | 82.29 | i | 92.90 | j | 91.74 | h | 85.95 | k | 80.73 | i | 62.05 | j | 51.80 | k | ----- | z |
1991 | 58.41 | i | 65.65 | k | 54.67 | j | 66.59 | h | 71.95 | i | 83.10 | j | 93.41 | i | 87.84 | l | 93.63 | k | 83.18 | i | 66.00 | m | 57.29 | j | ----- | z |
1992 | 54.59 | i | 61.68 | j | 65.95 | i | 72.73 | h | 83.70 | k | 86.18 | h | 89.86 | i | 97.14 | j | 87.33 | i | 77.36 | i | 63.30 | j | 54.00 | i | ----- | z |
1993 | 50.00 | l | 53.42 | i | 64.65 | h | 67.41 | h | 70.94 | m | 81.23 | h | 88.91 | i | 90.23 | i | 87.70 | j | 77.19 | j | 66.50 | l | 54.12 | n | ----- | z |
1994 | 56.44 | m | 56.78 | j | 67.09 | i | 70.52 | i | 76.00 | j | 83.95 | i | 95.89 | l | 93.05 | l | 87.86 | i | 74.11 | l | 56.05 | k | 50.33 | m | ----- | z |
1995 | 52.14 | j | 63.84 | i | 58.30 | h | 67.56 | n | 71.60 | k | 80.62 | i | 88.25 | k | 91.30 | h | 89.10 | j | 80.71 | n | 68.75 | j | 56.39 | m | ----- | z |
1996 | 55.00 | j | 58.15 | i | 64.38 | j | 67.68 | h | 75.22 | h | 85.95 | j | 95.59 | i | 96.14 | j | ----- | z | 71.78 | v | 63.06 | m | 56.61 | m | ----- | z |
1997 | 53.05 | i | 60.40 | h | ----- | z | 69.64 | h | 81.71 | j | 82.50 | p | 92.26 | l | 91.16 | l | 86.35 | j | 73.58 | l | 60.38 | f | 55.14 | i | ----- | z |
1998 | 51.50 | k | 50.54 | b | 62.87 | h | 67.35 | m | 63.17 | m | 81.56 | l | 92.18 | i | 95.81 | j | 88.85 | j | 74.52 | j | 59.00 | o | 54.95 | k | 50.54 | k |
1999 | 57.06 | m | 52.83 | j | 56.87 | h | 66.42 | k | 77.06 | m | 82.95 | j | 90.42 | l | 88.43 | j | 90.95 | i | 79.10 | k | 65.33 | l | 58.50 | k | ----- | z |
2000 | 54.33 | m | 54.89 | j | 64.39 | h | 71.84 | k | 75.59 | i | 89.80 | j | 89.56 | m | 92.14 | i | 86.40 | j | 73.10 | k | 59.00 | l | 57.67 | m | ----- | z |
2001 | 53.95 | j | 55.74 | i | 69.45 | i | 66.81 | i | 87.50 | i | 85.57 | i | 90.07 | q | 91.96 | c | 87.67 | c | 80.89 | d | 62.15 | c | 52.00 | b | 74.93 | g |
2002 | 56.36 | f | 62.96 | d | 62.41 | d | 74.71 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.68 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.43 | 58.16 | 62.32 | 69.06 | 77.89 | 86.17 | 94.51 | 93.20 | 87.53 | 75.66 | 61.30 | 54.01 | 72.84 | |||||||||||||
S.D. | 3.70 | 3.85 | 3.69 | 4.83 | 4.13 | 3.90 | 3.46 | 3.29 | 3.22 | 3.46 | 3.42 | 3.17 | 1.23 | |||||||||||||
SKEW | -0.86 | -0.23 | -0.07 | -0.45 | -0.51 | -0.54 | -0.82 | -0.16 | -0.75 | -0.15 | 0.51 | -0.64 | -0.82 | |||||||||||||
MAX | 59.48 | 66.62 | 68.94 | 77.47 | 85.29 | 92.60 | 100.10 | 100.61 | 93.60 | 81.32 | 71.10 | 60.03 | 75.00 | |||||||||||||
MIN | 42.90 | 49.18 | 53.17 | 55.57 | 66.77 | 74.73 | 84.45 | 86.29 | 77.93 | 67.73 | 55.28 | 46.21 | 69.50 | |||||||||||||
YRS | 41 | 47 | 48 | 47 | 43 | 47 | 46 | 47 | 48 | 45 | 48 | 47 | 33 |