YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | 32.25 | g | 40.46 | 49.06 | 59.27 | 72.35 | 84.27 | 87.35 | 85.23 | 79.27 | 65.74 | 52.57 | ----- | z | 67.56 | b | ||||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 90.21 | l | 81.00 | 73.05 | i | 62.10 | a | 51.21 | a | ----- | z | 64.77 | i | |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.93 | p | ----- | z |
1946 | 33.26 | 42.11 | 56.19 | 68.94 | m | 71.03 | a | 88.97 | 89.57 | a | 84.29 | ----- | z | ----- | z | 48.39 | b | 49.52 | 62.59 | c | ||||||
1947 | 34.55 | 48.07 | 54.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.79 | g | 45.84 | i | |||
1948 | 40.10 | a | 42.10 | 46.00 | 69.03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.90 | 48.63 | g | ||||
1949 | 35.07 | b | 40.04 | 56.46 | c | 66.37 | 72.92 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.45 | 48.68 | g | |||
1950 | 46.04 | d | 51.50 | 54.87 | a | 68.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.52 | c | 51.76 | b | 54.68 | f | ||
1951 | 46.33 | a | 46.68 | 53.87 | 64.27 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.79 | h | |||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.45 | 38.45 | k | |
1953 | 44.53 | a | 44.63 | a | 56.93 | a | 63.63 | c | ----- | z | 85.97 | 88.81 | 86.77 | 82.87 | 66.26 | 53.87 | 38.00 | 64.75 | a | |||||||
1954 | 45.58 | 56.54 | 52.90 | 70.77 | 75.48 | 86.14 | a | 88.52 | 87.50 | u | 78.53 | 68.81 | 57.03 | a | 40.65 | 65.54 | a | |||||||||
1955 | 36.23 | 39.50 | 54.92 | f | 62.70 | 70.43 | a | 81.80 | 85.35 | 83.06 | 81.00 | a | 69.87 | 52.83 | 42.32 | 64.10 | a | |||||||||
1956 | 46.77 | 39.45 | 57.13 | 63.90 | 79.23 | 86.90 | 86.55 | 83.81 | 83.37 | 68.90 | 49.50 | 43.97 | 65.79 | |||||||||||||
1957 | 41.74 | 52.43 | 52.35 | 60.80 | 66.16 | 82.77 | 85.42 | 81.77 | 79.14 | a | 61.73 | a | 43.97 | 44.55 | 62.74 | |||||||||||
1958 | 41.52 | 48.43 | 46.52 | 60.50 | 77.19 | 87.55 | a | 87.97 | 86.84 | 77.87 | 67.27 | a | 53.33 | 51.00 | 65.50 | |||||||||||
1959 | 45.31 | b | 45.74 | a | 55.20 | a | 65.33 | 71.84 | 86.63 | 88.74 | 83.65 | 80.34 | a | 65.71 | 54.10 | 43.42 | 65.50 | |||||||||
1960 | 35.13 | 38.28 | 56.77 | 67.10 | 72.71 | 84.73 | 88.81 | 88.35 | 80.40 | 62.35 | 55.77 | 34.55 | 63.75 | |||||||||||||
1961 | 38.77 | a | 47.00 | 53.74 | 63.97 | a | 76.42 | 86.60 | 87.06 | 82.77 | 74.00 | 64.61 | 47.37 | 38.26 | 63.38 | |||||||||||
1962 | 36.23 | 46.50 | 48.19 | 67.70 | 74.48 | 81.97 | 85.55 | 86.58 | 76.17 | 66.16 | 54.37 | 44.26 | 64.01 | |||||||||||||
1963 | 32.48 | 46.11 | 53.35 | 65.47 | 77.84 | 83.60 | 88.65 | 81.65 | 78.03 | 69.65 | 53.57 | 41.67 | g | 66.40 | a | |||||||||||
1964 | 39.13 | 36.76 | 46.35 | 60.29 | b | 72.00 | g | 85.25 | j | 87.71 | 82.58 | 74.83 | 69.48 | 51.00 | a | 41.48 | 58.96 | b | ||||||||
1965 | 41.26 | 42.00 | 49.32 | 62.23 | 70.39 | 78.50 | 84.74 | 82.35 | 72.23 | 68.06 | 54.70 | 40.83 | a | 62.22 | ||||||||||||
1966 | 34.58 | 37.04 | a | 56.32 | 64.97 | a | 74.90 | 82.07 | 86.77 | 83.97 | 76.37 | 67.03 | a | 56.03 | 39.48 | 63.29 | ||||||||||
1967 | 39.39 | 48.57 | 61.29 | 65.37 | 71.10 | 78.33 | 86.61 | 80.90 | 74.47 | 68.68 | 55.97 | 32.94 | 63.63 | |||||||||||||
1968 | 36.52 | 47.62 | 51.45 | 58.60 | 70.43 | a | 83.00 | 83.68 | 78.13 | 76.62 | a | 68.30 | a | 46.60 | 37.87 | 61.57 | ||||||||||
1969 | 42.90 | 43.93 | 46.32 | 65.17 | 73.32 | 78.47 | 86.45 | 85.45 | 76.97 | a | 61.16 | 51.67 | 46.00 | 63.15 | ||||||||||||
1970 | 39.84 | 51.36 | 49.94 | 58.30 | 74.84 | 80.14 | a | 87.13 | 85.71 | 75.73 | 59.39 | 52.27 | 45.19 | 63.32 | ||||||||||||
1971 | 42.06 | 46.36 | 55.55 | 63.57 | 73.32 | 86.89 | c | 88.61 | 84.45 | 77.60 | 62.71 | 50.90 | 35.74 | 63.98 | ||||||||||||
1972 | 44.10 | 51.86 | 62.80 | a | 66.93 | 75.10 | a | 81.50 | 89.23 | 83.06 | 76.03 | 62.48 | 42.67 | 37.23 | 64.42 | |||||||||||
1973 | 32.29 | 39.14 | 45.30 | a | 56.70 | 70.65 | 83.13 | 87.81 | 86.94 | ----- | z | 72.80 | a | 56.97 | 45.71 | 61.58 | a | |||||||||
1974 | 37.16 | 44.32 | 60.94 | 63.83 | 79.42 | 88.00 | 86.61 | 83.68 | 75.97 | 65.23 | a | 51.40 | 37.48 | 64.50 | ||||||||||||
1975 | 36.23 | 41.54 | 52.19 | 60.63 | 70.93 | a | 83.03 | a | 85.39 | 84.35 | 74.10 | 69.77 | 53.57 | 42.90 | 62.89 | |||||||||||
1976 | 42.03 | b | 53.41 | 56.32 | c | 65.03 | 74.13 | 85.17 | 88.42 | 84.90 | 77.96 | b | 65.03 | a | 53.30 | 41.10 | a | 65.57 | ||||||||
1977 | 33.13 | a | 45.04 | 52.42 | 66.70 | 74.19 | 87.60 | 87.10 | 86.20 | a | 79.67 | 68.73 | a | 54.71 | b | 47.90 | a | 65.28 | ||||||||
1978 | 41.16 | 42.11 | 57.10 | 66.83 | a | 70.48 | 86.19 | c | 90.00 | d | 86.43 | c | 79.33 | f | 69.29 | 51.41 | a | 35.23 | a | 63.29 | a | |||||
1979 | 32.48 | 40.82 | 52.45 | 64.83 | a | 69.31 | e | 82.07 | b | 89.27 | a | 84.03 | 82.20 | 71.26 | 46.33 | 44.65 | 63.31 | |||||||||
1980 | 40.77 | 47.52 | 52.16 | 62.21 | b | 72.16 | 88.04 | b | 91.50 | a | 85.83 | a | 79.48 | a | 67.39 | 55.41 | a | 52.20 | a | 66.22 | ||||||
1981 | 51.93 | b | 52.46 | 51.10 | 69.38 | d | 71.50 | a | 86.93 | b | 87.52 | 85.27 | a | 78.33 | 66.10 | 58.40 | 49.55 | 67.37 | ||||||||
1982 | 41.16 | 42.41 | a | 54.87 | 63.53 | 71.88 | f | 83.47 | 86.47 | a | 84.03 | a | 76.32 | b | 66.10 | a | 51.37 | c | 41.70 | a | 62.86 | a | ||||
1983 | 40.32 | 44.56 | a | 51.83 | a | 56.83 | 70.94 | 81.07 | a | 86.68 | 85.68 | 81.10 | a | 66.40 | a | 52.53 | 41.65 | 63.30 | ||||||||
1984 | 37.58 | 46.55 | 54.90 | 61.70 | 79.03 | 81.93 | 87.65 | 84.71 | 78.90 | 56.77 | 52.67 | 42.00 | 63.70 | |||||||||||||
1985 | 37.77 | 41.89 | 54.42 | 66.10 | 73.29 | 86.20 | 87.90 | 86.55 | 74.47 | 66.00 | 51.43 | 42.84 | 64.07 | |||||||||||||
1986 | 51.90 | 50.21 | 59.61 | 64.63 | 75.42 | 82.90 | 84.39 | 86.97 | 74.93 | a | 63.90 | 50.70 | 42.13 | a | 65.64 | |||||||||||
1987 | 37.90 | 42.00 | 50.94 | 66.53 | 68.97 | 82.60 | 86.16 | f | 81.26 | h | 77.19 | i | 67.89 | d | 50.00 | 39.35 | 56.24 | c | ||||||||
1988 | 33.32 | 45.83 | 55.35 | 63.24 | a | 72.36 | c | 81.75 | f | 87.09 | i | 80.17 | g | 74.80 | j | 68.91 | i | 52.76 | a | 44.00 | b | 52.41 | e | |||
1989 | 38.19 | 45.39 | 61.65 | 71.04 | e | 76.09 | i | 83.61 | g | 86.70 | k | 81.43 | h | 78.35 | j | 65.32 | i | 54.70 | 44.50 | a | 52.58 | f | ||||
1990 | 40.58 | 43.93 | 55.13 | 63.20 | 71.42 | 87.38 | f | 83.32 | i | 80.09 | h | 77.95 | k | 66.92 | e | 53.23 | 35.84 | 53.78 | d | |||||||
1991 | 34.00 | 46.86 | 50.87 | 63.87 | 74.50 | a | 79.77 | 84.61 | 83.06 | 75.50 | 68.50 | a | 47.14 | a | 37.32 | 62.17 | ||||||||||
1992 | 35.42 | 45.24 | 55.03 | 67.10 | 69.84 | 80.97 | 83.61 | 83.61 | 78.31 | a | 70.00 | a | 45.47 | 34.67 | a | 62.44 | ||||||||||
1993 | 41.82 | c | 46.64 | c | 55.55 | 65.07 | 72.94 | 83.17 | 87.41 | b | 81.71 | 77.00 | 65.17 | a | 48.67 | 45.11 | c | 64.19 | ||||||||
1994 | 46.50 | a | 46.44 | a | 57.93 | b | 63.60 | 73.84 | 86.97 | a | 88.19 | 86.29 | 76.40 | 63.29 | 49.55 | a | 45.73 | a | 65.39 | |||||||
1995 | 39.23 | a | 53.75 | 56.23 | 59.90 | 69.61 | 81.28 | a | 86.40 | a | 86.53 | a | 78.10 | a | 68.35 | 57.93 | 44.84 | 65.18 | ||||||||
1996 | 44.40 | a | 53.00 | 56.80 | a | 67.73 | 80.67 | a | 84.57 | 87.65 | 83.61 | 73.30 | 63.65 | 52.72 | a | 46.19 | 66.19 | |||||||||
1997 | 36.77 | a | 45.61 | 61.71 | 59.23 | 74.26 | 81.21 | a | 85.70 | a | 83.97 | 78.53 | 65.97 | a | 50.47 | 36.90 | 63.36 | |||||||||
1998 | 42.71 | 41.89 | a | 54.19 | 60.70 | 74.97 | 83.27 | 86.67 | a | 84.23 | a | 81.83 | a | 63.80 | a | 54.57 | 45.65 | 64.54 | ||||||||
1999 | 49.14 | b | 53.18 | 61.10 | a | 61.77 | 70.19 | 82.07 | 82.33 | a | 79.58 | 76.45 | a | 70.42 | 61.71 | b | 44.07 | a | 66.00 | |||||||
2000 | 47.07 | b | 52.14 | a | 54.35 | 68.57 | 79.87 | a | 84.86 | a | 88.35 | 86.39 | 81.73 | 61.90 | a | 43.30 | 44.48 | 66.09 | ||||||||
2001 | 38.90 | 48.22 | a | 54.45 | b | 66.83 | a | 77.77 | 87.76 | a | 88.17 | a | 82.87 | a | 81.41 | a | 70.83 | a | 53.77 | 39.73 | a | 65.89 | ||||
2002 | 40.77 | a | 49.33 | a | 57.00 | 70.93 | 77.07 | a | 88.70 | 88.60 | a | 86.63 | a | 76.90 | 62.67 | a | 52.04 | c | 40.10 | 65.89 | ||||||
2003 | 49.97 | b | 45.74 | a | 55.10 | 66.37 | 77.00 | 83.40 | 92.52 | 85.33 | a | 79.03 | 71.43 | a | 51.89 | b | 47.19 | d | 67.08 | |||||||
2004 | 42.21 | c | 42.12 | c | 62.24 | b | 60.18 | h | 76.13 | 84.86 | a | 87.20 | a | 83.81 | 76.78 | c | 66.91 | h | 51.92 | r | 42.21 | l | 69.42 | d | ||
2005 | 46.04 | e | 45.86 | 52.52 | 65.13 | 75.55 | 83.96 | b | 91.60 | a | 83.35 | 79.72 | e | 66.08 | f | 57.10 | a | 46.03 | b | 66.08 | a | |||||
2006 | 47.17 | a | 51.36 | 54.29 | 68.93 | a | 78.33 | a | 87.46 | b | 86.39 | 80.90 | b | 71.77 | 63.90 | b | 55.20 | 40.97 | a | 65.55 | ||||||
2007 | 36.45 | 44.21 | 59.19 | 64.53 | 71.72 | b | 85.07 | 88.35 | 85.97 | 79.20 | 68.97 | 57.70 | 39.43 | c | 65.07 | |||||||||||
2008 | 36.50 | c | 45.96 | f | 57.65 | 64.63 | 73.32 | 85.21 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.03 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 40.33 | 45.83 | 54.50 | 64.37 | 73.71 | 84.05 | 87.35 | 84.26 | 77.74 | 66.32 | 52.33 | 42.38 | 64.47 | |||||||||||||
S.D. | 4.99 | 4.54 | 4.14 | 3.38 | 3.22 | 2.77 | 1.96 | 2.09 | 2.72 | 3.32 | 3.83 | 4.47 | 1.42 | |||||||||||||
SKEW | 0.37 | 0.17 | -0.18 | -0.22 | 0.23 | -0.14 | 0.05 | -0.58 | -0.01 | -0.47 | -0.44 | 0.04 | -0.01 | |||||||||||||
MAX | 51.93 | 56.54 | 62.80 | 71.04 | 80.67 | 88.97 | 92.52 | 88.35 | 83.37 | 72.80 | 61.71 | 52.20 | 67.37 | |||||||||||||
MIN | 32.29 | 36.76 | 45.30 | 56.70 | 66.16 | 78.33 | 82.33 | 78.13 | 71.77 | 56.77 | 42.67 | 32.94 | 61.57 | |||||||||||||
YRS | 62 | 62 | 62 | 60 | 54 | 53 | 53 | 53 | 50 | 53 | 58 | 58 | 41 |