YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.75 | w | 71.82 | 57.00 | a | 48.80 | d | 35.94 | f | 30.31 | j | 59.21 | i | |
1959 | 25.11 | i | 29.58 | c | 37.73 | c | 46.79 | b | 49.91 | c | 60.54 | e | 70.05 | c | 63.06 | d | 55.07 | g | 43.33 | p | 31.02 | i | 31.44 | o | 51.09 | e |
1960 | 22.00 | i | 29.71 | j | 36.62 | f | 45.43 | b | 50.55 | 61.62 | a | 73.61 | 64.21 | 59.42 | 46.07 | a | 34.13 | 25.48 | b | 51.17 | c | |||||
1961 | 26.54 | d | 34.63 | b | 37.57 | a | 44.71 | b | 54.52 | a | 66.65 | 70.14 | c | 72.40 | b | 55.00 | a | 43.88 | b | 30.43 | 25.97 | 46.87 | ||||
1962 | 22.50 | 31.23 | 33.95 | 49.05 | a | 49.47 | 58.92 | 64.31 | d | 63.85 | a | 58.73 | 45.95 | 36.26 | c | 31.40 | a | 45.47 | ||||||||
1963 | 13.88 | c | 35.63 | e | 38.85 | a | 42.53 | 51.26 | j | 62.10 | 73.29 | l | ----- | z | 63.17 | x | 48.55 | 34.98 | a | 25.98 | d | 37.81 | d | |||
1964 | 28.38 | b | 29.17 | 33.41 | h | 42.72 | 50.77 | 59.42 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.45 | k | 42.09 | g | ||||
1965 | 28.53 | 28.39 | f | 33.13 | d | 45.66 | e | ----- | z | 59.92 | q | 67.40 | 67.48 | d | 54.06 | c | 50.88 | b | 37.50 | e | 31.04 | f | 48.08 | d | ||
1966 | ----- | z | ----- | z | 38.95 | l | 44.65 | 56.53 | b | 59.78 | c | 68.02 | a | 69.37 | 65.88 | 49.88 | b | 39.62 | a | 33.82 | f | 56.72 | d | |||
1967 | 30.68 | n | 37.29 | n | 37.81 | o | 42.62 | 52.82 | 63.54 | c | 69.55 | b | 73.50 | 66.92 | 47.59 | c | 37.52 | c | 29.14 | x | 56.76 | d | ||||
1968 | 26.79 | j | ----- | z | ----- | z | ----- | z | 51.50 | k | ----- | z | 70.72 | m | 62.48 | i | 59.69 | f | 43.96 | h | 34.20 | o | 21.94 | g | ----- | z |
1969 | 14.03 | 24.91 | 34.53 | b | 44.98 | 56.35 | 64.17 | 65.48 | 63.24 | 54.92 | 40.47 | 32.85 | 26.28 | d | 43.52 | |||||||||||
1970 | 23.89 | 32.46 | 36.73 | 40.34 | h | 51.13 | d | 65.78 | 70.65 | 69.69 | 53.80 | 43.73 | 33.93 | b | 26.05 | 46.17 | a | |||||||||
1971 | 28.27 | e | 31.41 | 32.81 | 44.55 | 56.45 | 57.52 | 69.02 | 73.06 | 53.15 | 43.98 | 34.37 | 24.19 | 45.73 | ||||||||||||
1972 | 21.87 | 29.38 | 39.71 | 40.95 | 54.24 | 60.35 | 65.32 | 70.89 | 51.75 | 44.61 | 35.33 | 21.97 | 44.70 | |||||||||||||
1973 | 25.23 | 33.46 | 39.52 | 45.80 | 53.71 | 58.53 | ----- | z | 69.13 | 57.85 | 45.84 | 31.88 | 31.35 | 44.76 | a | |||||||||||
1974 | 23.97 | 33.29 | 36.98 | a | 45.97 | 49.19 | 65.50 | 66.50 | 68.31 | 61.32 | 49.92 | 36.77 | 30.94 | 47.39 | ||||||||||||
1975 | 25.37 | 27.73 | 34.13 | 42.00 | 52.52 | 59.23 | 72.63 | a | 64.03 | 61.28 | 45.40 | 32.90 | 30.18 | 45.62 | ||||||||||||
1976 | 28.06 | 30.53 | 33.94 | 44.72 | 53.87 | 58.10 | 67.52 | 63.55 | 61.75 | 46.26 | 35.48 | 29.47 | 46.10 | |||||||||||||
1977 | 23.00 | 35.34 | 38.60 | 50.68 | 51.37 | a | 65.32 | b | 66.97 | 71.30 | a | 52.50 | 42.38 | b | 32.80 | 26.19 | b | 46.37 | ||||||||
1978 | 29.03 | a | 32.16 | 36.60 | 44.58 | 50.95 | 62.70 | 68.80 | a | 63.19 | 53.29 | a | 45.97 | b | 29.52 | 20.85 | 44.80 | |||||||||
1979 | 13.15 | a | 27.70 | 37.76 | 42.90 | 52.84 | 61.58 | 68.76 | 67.50 | 61.20 | 48.39 | 29.50 | 31.77 | 45.25 | ||||||||||||
1980 | 19.18 | 30.87 | c | 34.50 | f | 48.95 | 55.76 | f | 58.86 | a | 68.70 | h | 63.78 | b | 57.70 | 47.69 | 34.70 | 31.03 | 43.64 | c | ||||||
1981 | 32.89 | 32.68 | 42.10 | b | 44.73 | 51.74 | 53.80 | j | 68.40 | 73.08 | 60.25 | 46.24 | 37.87 | 28.40 | 47.13 | a | ||||||||||
1982 | 26.77 | k | 28.82 | f | 39.69 | e | 45.39 | g | 54.58 | e | 62.26 | g | 65.88 | f | 65.89 | h | 60.04 | f | 45.61 | d | 32.95 | j | 24.18 | l | 46.63 | i |
1983 | 30.21 | g | 29.66 | f | 42.15 | h | 45.55 | i | 56.95 | k | 57.88 | j | 60.38 | k | 69.61 | l | 57.15 | j | 47.26 | l | 37.38 | m | 21.93 | j | ----- | z |
1984 | 27.30 | f | 35.36 | h | 45.25 | g | 47.40 | f | 54.09 | h | 62.24 | i | 70.58 | f | 71.70 | i | 59.44 | e | 47.46 | f | 35.52 | c | 21.73 | e | 38.90 | i |
1985 | 25.94 | 27.84 | 39.77 | c | 49.97 | 59.95 | 62.07 | b | 77.66 | 69.18 | a | 57.67 | a | 49.50 | 27.36 | b | 22.76 | 47.47 | ||||||||
1986 | 30.10 | a | 31.96 | 46.50 | g | 46.86 | b | 58.03 | 68.97 | 67.39 | 73.98 | a | 57.64 | a | 53.58 | 39.78 | c | 31.19 | 50.86 | a | ||||||
1987 | 31.50 | 40.02 | f | 44.31 | b | 54.33 | 60.50 | a | 65.84 | a | 68.94 | 68.65 | 65.78 | a | 53.17 | a | 41.38 | a | 26.33 | d | 52.79 | a | ||||
1988 | 27.15 | 35.44 | d | 43.13 | 53.18 | 57.39 | 61.33 | a | 71.98 | d | 72.74 | l | 66.60 | f | 54.86 | i | 35.83 | a | 25.38 | g | 48.18 | d | ||||
1989 | 26.04 | h | 23.55 | i | 35.12 | g | 48.67 | i | 53.60 | a | 62.83 | 68.17 | k | 66.55 | a | 54.78 | a | 35.24 | ----- | z | 24.89 | h | 54.60 | g | ||
1990 | 25.43 | a | 22.92 | c | 33.73 | c | 40.70 | j | 44.65 | h | 54.32 | k | 74.28 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.36 | i |
1991 | ----- | z | 32.67 | y | ----- | z | ----- | z | 48.22 | b | 51.70 | 67.77 | i | ----- | z | ----- | z | 47.07 | d | 33.57 | 31.48 | b | 42.41 | g | ||
1992 | ----- | z | 36.95 | 44.50 | b | 48.03 | ----- | z | 68.11 | b | 65.55 | 68.64 | b | 55.48 | b | 44.90 | 29.82 | 24.96 | d | 48.69 | b | |||||
1993 | 23.78 | b | 28.55 | 38.90 | 45.98 | a | ----- | z | 61.63 | 61.22 | b | 66.07 | a | 61.30 | 52.03 | ----- | z | ----- | z | 48.83 | c | |||||
1994 | ----- | z | 29.98 | d | 42.78 | a | 51.07 | 57.79 | j | 62.34 | n | 74.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.65 | h | ||
1995 | ----- | z | ----- | z | 39.15 | d | 47.87 | 58.15 | e | ----- | z | 67.64 | c | 61.57 | b | 60.68 | e | 41.90 | 27.81 | v | 28.78 | o | 53.85 | e | ||
1996 | 24.69 | g | 32.32 | g | 36.13 | a | 48.43 | a | 49.83 | d | 60.38 | a | 69.58 | 67.00 | e | 55.54 | b | 46.48 | a | 33.71 | a | 26.44 | d | 49.35 | b | |
1997 | 29.52 | d | 31.31 | d | 38.52 | 44.48 | 56.84 | 59.52 | a | 67.14 | f | 69.66 | 60.67 | a | 46.31 | 35.71 | a | 29.48 | a | 45.64 | a | |||||
1998 | 29.69 | 36.93 | a | 42.02 | 47.94 | c | 55.72 | d | ----- | z | 71.65 | a | 69.73 | c | 65.58 | f | 45.80 | a | 36.18 | m | 26.60 | g | 49.94 | d | ||
1999 | 29.89 | c | 32.41 | a | 38.67 | b | 46.05 | 51.37 | e | 62.10 | i | 64.34 | c | 68.67 | d | 58.21 | f | 46.55 | c | 39.04 | d | 32.19 | e | 44.92 | b | |
2000 | 28.17 | b | 33.94 | c | 39.67 | a | 51.26 | e | 52.21 | b | 61.12 | b | 68.35 | g | 69.24 | j | 56.38 | j | 46.80 | d | 31.25 | l | ----- | z | 44.74 | e |
2001 | 26.58 | e | ----- | z | 38.07 | i | 41.70 | g | 52.43 | h | 58.22 | g | 62.90 | g | 67.90 | e | 60.98 | j | 44.79 | e | 37.25 | h | 27.54 | r | 46.42 | i |
2002 | 29.12 | e | 30.88 | g | 32.40 | f | 44.46 | g | 49.82 | f | 60.10 | i | 69.10 | g | 64.92 | e | 57.40 | e | 43.36 | j | 35.54 | e | ----- | z | 46.74 | h |
2003 | 30.42 | 31.96 | d | 38.94 | f | 42.85 | d | 51.11 | d | ----- | z | 68.11 | d | 66.07 | j | 57.36 | e | 46.70 | i | ----- | z | ----- | z | 46.97 | f | |
2004 | 27.57 | q | 32.81 | e | 39.50 | h | 45.98 | j | 49.50 | l | 59.93 | i | 66.87 | d | 66.81 | j | 52.74 | k | 46.89 | l | 34.07 | p | 27.12 | w | 49.84 | j |
2005 | 25.16 | o | 30.44 | j | 39.02 | j | 45.62 | n | 51.25 | m | 57.94 | l | 66.61 | q | 64.38 | e | 53.93 | o | 46.44 | n | 30.95 | i | 18.69 | r | 64.38 | k |
2006 | 31.02 | k | 28.56 | k | 35.79 | n | 45.55 | k | 53.83 | j | 58.67 | j | 63.83 | j | 66.19 | o | 60.31 | n | 49.20 | d | ----- | z | ----- | z | 49.20 | k |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.06 | m | 46.53 | 25.72 | 19.67 | b | 30.64 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.65 | 31.46 | 38.25 | 46.38 | 53.53 | 61.73 | 68.67 | 67.81 | 58.17 | 46.52 | 34.42 | 27.18 | 45.77 | |||||||||||||
S.D. | 5.01 | 3.27 | 3.25 | 3.23 | 3.22 | 3.53 | 3.31 | 3.47 | 3.91 | 3.43 | 3.59 | 3.74 | 1.16 | |||||||||||||
SKEW | -1.18 | -0.50 | 0.12 | 0.61 | 0.44 | -0.19 | 0.47 | 0.04 | 0.43 | -0.58 | -0.41 | -0.33 | -0.19 | |||||||||||||
MAX | 32.89 | 36.95 | 44.50 | 54.33 | 60.50 | 68.97 | 77.66 | 73.98 | 66.92 | 53.58 | 41.38 | 32.19 | 47.47 | |||||||||||||
MIN | 13.15 | 22.92 | 32.81 | 40.95 | 48.22 | 51.70 | 61.22 | 61.57 | 51.75 | 35.24 | 25.72 | 19.67 | 43.52 | |||||||||||||
YRS | 31 | 31 | 31 | 35 | 33 | 31 | 31 | 35 | 32 | 38 | 32 | 27 | 12 |