YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | 21.14 | 31.68 | 39.47 | 50.29 | 59.00 | 65.89 | v | 58.79 | q | 54.52 | a | 39.48 | 31.20 | 18.15 | d | 38.33 | c | |||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.33 | 64.52 | 59.16 | 54.63 | 43.32 | 34.30 | 22.26 | 48.07 | e | |||||||
1968 | 25.10 | 25.79 | 32.45 | 35.86 | b | 47.87 | 58.83 | 62.39 | 60.58 | 52.47 | 42.77 | 31.17 | 22.83 | a | 41.51 | |||||||||||
1969 | 29.39 | 26.11 | 23.00 | 39.73 | 48.87 | 54.47 | 64.74 | 62.06 | 55.77 | 41.45 | 27.30 | 22.61 | 41.29 | |||||||||||||
1970 | 17.97 | 26.07 | 24.84 | 34.27 | 48.06 | 52.73 | 61.97 | 60.00 | 50.43 | 37.35 | 28.97 | 27.52 | 39.18 | |||||||||||||
1971 | 21.94 | 25.14 | 28.74 | 37.50 | 44.35 | 55.43 | 61.35 | 57.84 | 51.60 | 41.13 | a | 33.57 | 25.00 | 40.30 | ||||||||||||
1972 | 22.23 | 22.97 | 32.74 | 38.67 | 48.48 | 59.93 | 62.13 | 61.39 | 55.70 | 44.68 | 27.53 | 22.61 | 41.59 | |||||||||||||
1973 | 21.81 | 26.50 | 32.94 | 33.76 | a | 45.58 | 57.07 | 61.94 | 60.77 | a | 51.90 | 42.97 | 35.20 | 23.94 | 41.20 | |||||||||||
1974 | 23.55 | 23.39 | 35.32 | 39.53 | 53.32 | 58.83 | 64.32 | 61.32 | 51.53 | 46.45 | 33.20 | 23.68 | 42.87 | |||||||||||||
1975 | 23.52 | 25.43 | 31.00 | 37.73 | 44.16 | 56.30 | 61.71 | 61.81 | 52.73 | 42.97 | 29.23 | 25.23 | 40.98 | |||||||||||||
1976 | 21.68 | 32.41 | 32.52 | 42.90 | 47.39 | 58.10 | 62.81 | 61.58 | 53.97 | 37.55 | 25.40 | 19.68 | 41.33 | |||||||||||||
1977 | 18.35 | 24.39 | 28.57 | a | 42.03 | 52.19 | 61.67 | 65.16 | 65.03 | 57.40 | 44.23 | 32.70 | 30.30 | a | 43.50 | |||||||||||
1978 | 19.71 | 23.54 | 33.13 | 42.20 | 48.77 | 60.73 | 65.23 | 61.37 | a | 56.73 | 43.55 | 37.30 | 20.68 | 42.74 | ||||||||||||
1979 | 18.53 | a | 26.04 | 31.32 | 40.10 | 49.65 | 56.50 | 63.90 | 60.83 | a | 53.47 | 42.84 | 26.43 | 22.45 | 41.01 | |||||||||||
1980 | 23.97 | a | 24.83 | 31.35 | 35.90 | 47.35 | 63.13 | 68.52 | 63.81 | 57.50 | 39.58 | 30.10 | a | 29.63 | a | 42.97 | ||||||||||
1981 | 22.10 | 25.39 | 33.35 | 46.67 | 49.06 | 60.47 | 64.94 | 62.39 | 55.70 | 45.61 | 36.27 | 26.74 | 44.06 | |||||||||||||
1982 | 25.42 | 24.68 | 34.16 | 42.17 | a | 49.84 | 58.47 | 64.23 | 63.35 | 57.23 | 42.42 | 32.70 | 25.74 | 43.37 | ||||||||||||
1983 | 22.55 | 27.93 | 32.83 | a | 36.50 | 43.87 | 55.03 | 65.35 | 64.32 | 58.67 | 45.90 | 36.79 | a | 18.96 | c | 42.39 | ||||||||||
1984 | 21.73 | a | 25.66 | 30.13 | 36.47 | 52.55 | 59.70 | 63.26 | 61.58 | 53.13 | 41.74 | 34.93 | 27.90 | 42.40 | ||||||||||||
1985 | 20.28 | b | 24.36 | 36.77 | 42.87 | 50.65 | 59.67 | 62.23 | 61.68 | 54.50 | 44.70 | a | 34.03 | 20.74 | 42.71 | |||||||||||
1986 | 26.84 | 27.50 | 37.10 | 43.00 | 49.32 | 58.40 | 63.58 | 62.23 | 55.53 | 42.26 | 31.40 | 25.68 | 43.57 | |||||||||||||
1987 | 21.81 | 28.79 | 30.35 | 37.80 | 49.35 | 56.83 | 62.81 | 61.52 | 53.50 | 43.48 | 30.20 | 22.71 | 41.60 | |||||||||||||
1988 | 20.61 | 24.69 | 30.39 | 39.03 | 47.65 | 59.10 | 62.45 | 62.84 | 53.13 | 43.87 | 33.50 | 21.58 | 41.57 | |||||||||||||
1989 | 25.35 | 22.19 | a | 33.77 | 40.03 | 49.90 | 50.17 | 59.94 | 61.58 | 45.75 | v | 42.95 | k | 29.60 | 14.30 | d | 38.68 | b | ||||||||
1990 | 23.00 | a | 23.53 | m | 23.44 | v | 40.44 | l | 47.06 | 62.80 | 63.20 | a | 59.31 | b | 55.59 | a | 40.14 | b | 33.32 | e | 14.85 | e | 44.36 | c | ||
1991 | 20.40 | a | 23.92 | b | 31.83 | b | 38.26 | c | 47.84 | f | 56.52 | e | 61.41 | d | 61.42 | 52.80 | e | 41.04 | d | 28.48 | g | 25.07 | b | 41.27 | b | |
1992 | 22.14 | b | 26.65 | c | 30.29 | j | 42.29 | i | 47.52 | f | 54.52 | c | 61.70 | d | 59.47 | a | 53.07 | c | 44.69 | b | 25.71 | b | 23.94 | 41.32 | c | |
1993 | 25.52 | b | 26.14 | 31.79 | b | 39.85 | c | 48.34 | b | 57.37 | c | 76.00 | d | 79.12 | f | 43.94 | l | 40.37 | d | 27.57 | 23.27 | a | 39.62 | b | ||
1994 | 20.10 | b | 24.50 | f | 32.33 | p | 40.14 | a | 50.83 | g | 59.93 | o | 62.81 | 65.63 | a | 53.71 | b | 42.57 | h | 33.50 | d | 27.28 | b | 43.31 | e | |
1995 | 26.19 | 27.86 | g | 33.64 | f | 33.41 | m | 47.48 | b | 57.67 | f | 62.41 | n | 66.38 | g | 54.09 | g | 40.62 | j | 33.86 | h | 26.90 | b | 33.52 | i | |
1996 | 23.37 | a | 27.66 | 29.03 | 39.04 | b | 55.83 | a | 59.53 | 64.16 | 61.65 | 52.29 | b | 41.87 | 32.07 | 26.47 | a | 42.75 | ||||||||
1997 | 19.83 | b | 26.37 | a | 32.34 | b | 37.26 | c | 50.89 | c | 57.08 | d | 60.76 | b | 59.30 | d | 53.89 | k | 42.77 | 28.64 | b | 19.83 | a | 39.55 | a | |
1998 | 25.97 | b | 27.78 | a | 28.97 | a | 35.17 | a | 48.43 | a | 57.07 | a | 63.86 | c | 59.90 | b | 56.33 | 45.68 | 35.13 | 23.58 | 42.32 | |||||
1999 | 26.30 | a | 28.82 | 32.48 | 36.86 | a | ----- | z | ----- | z | ----- | z | ----- | z | 51.82 | h | 38.54 | g | 31.70 | 24.80 | a | 30.16 | f | |||
2000 | 25.28 | f | 33.26 | f | 31.60 | a | 42.14 | b | 52.52 | 59.97 | 63.55 | 62.73 | a | 55.34 | a | 43.33 | a | 27.37 | 19.50 | a | 45.81 | b | ||||
2001 | 21.87 | 28.35 | b | 32.73 | a | 42.87 | 48.45 | 58.80 | 65.93 | c | 60.94 | 53.96 | b | 42.22 | d | 37.17 | 25.00 | a | 43.19 | |||||||
2002 | 24.73 | a | 23.04 | 26.63 | d | 45.28 | e | 48.77 | a | 63.54 | b | 62.90 | a | 62.97 | 55.90 | a | 43.10 | a | 30.89 | b | 30.95 | k | 44.34 | a | ||
2003 | 25.00 | j | 27.04 | 34.00 | i | 40.18 | h | 50.71 | j | 54.81 | c | 65.38 | g | 63.17 | b | 55.17 | a | 45.73 | a | 32.86 | a | 25.00 | d | 43.40 | e | |
2004 | 26.97 | b | 21.18 | g | 37.00 | a | 40.00 | a | 53.30 | h | 58.32 | h | 58.48 | f | 58.74 | d | 54.86 | a | 44.93 | b | 31.28 | a | 25.81 | d | 39.95 | d |
2005 | 27.42 | e | 31.83 | d | 30.19 | e | 39.75 | f | 48.83 | b | 57.88 | e | 62.96 | d | 61.13 | h | 57.04 | c | 43.03 | a | 32.00 | e | 23.17 | b | 41.44 | b |
2006 | 26.50 | k | 23.42 | i | 33.66 | b | 43.62 | d | 49.84 | f | 61.28 | a | 65.77 | a | 63.48 | 50.26 | c | 43.11 | d | 29.33 | i | 24.68 | c | 48.23 | d | |
2007 | 19.83 | b | 22.00 | m | 35.24 | j | 34.08 | r | 46.56 | f | 53.67 | c | 62.46 | c | 64.17 | b | 57.26 | c | 44.00 | g | 30.64 | e | 24.28 | f | 48.01 | f |
2008 | 21.23 | a | 29.38 | e | 30.74 | d | 35.89 | k | 47.63 | a | 59.00 | 63.52 | 60.36 | c | 53.23 | ----- | z | 31.75 | j | 26.25 | c | 43.48 | c | |||
2009 | 21.41 | b | 27.24 | c | ----- | z | ----- | z | 52.31 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.33 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.84 | 26.09 | 31.60 | 39.56 | 48.91 | 58.02 | 63.70 | 61.64 | 54.44 | 42.77 | 31.61 | 23.57 | 42.10 | |||||||||||||
S.D. | 2.76 | 2.44 | 2.99 | 3.09 | 2.53 | 2.85 | 2.63 | 1.77 | 2.07 | 2.17 | 3.18 | 3.46 | 1.16 | |||||||||||||
SKEW | 0.31 | 0.49 | -0.64 | 0.19 | 0.34 | -0.38 | 2.80 | 0.12 | -0.04 | -0.61 | -0.13 | -0.65 | -0.48 | |||||||||||||
MAX | 29.39 | 32.41 | 37.10 | 46.67 | 55.83 | 63.54 | 76.00 | 65.63 | 58.67 | 46.45 | 37.30 | 30.30 | 44.06 | |||||||||||||
MIN | 17.97 | 21.14 | 23.00 | 33.76 | 43.87 | 50.17 | 59.94 | 57.84 | 50.26 | 37.35 | 25.40 | 14.30 | 39.18 | |||||||||||||
YRS | 39 | 36 | 36 | 35 | 34 | 39 | 38 | 38 | 38 | 37 | 39 | 41 | 24 |