YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1919 | ----- | z | 7.11 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 26.28 | m | 27.42 | d | 33.77 | 41.83 | 49.58 | 46.42 | 39.80 | 27.74 | d | 24.25 | b | 13.61 | 33.83 | c | ||||||
1940 | 14.55 | 17.67 | b | 20.45 | 27.53 | 38.97 | 47.13 | 50.10 | a | 46.77 | 43.87 | 29.58 | 18.39 | b | 20.43 | a | 31.29 | |||||||||
1941 | 18.61 | 25.64 | 26.11 | d | 28.33 | 36.94 | 42.27 | 46.97 | 49.61 | 41.32 | e | 34.29 | g | 21.53 | 18.71 | 32.37 | a | |||||||||
1942 | 15.07 | d | 14.96 | 19.07 | b | 29.00 | 30.16 | 39.20 | 49.58 | 49.17 | b | 42.92 | e | 29.93 | b | ----- | z | 11.39 | m | 31.91 | b | |||||
1943 | 15.16 | 16.89 | 22.88 | e | 27.07 | 30.35 | 39.63 | 46.65 | 48.35 | 40.43 | 26.23 | 12.10 | 13.05 | k | 29.61 | a | ||||||||||
1944 | ----- | z | 12.34 | 14.74 | 20.70 | 30.13 | a | 37.97 | 49.55 | 48.13 | 39.00 | 33.03 | 20.13 | 13.06 | 28.98 | a | ||||||||||
1945 | 9.84 | 16.11 | 19.61 | 20.57 | ----- | z | 35.77 | 49.58 | 51.61 | 46.82 | s | ----- | z | ----- | z | ----- | z | 29.01 | e | |||||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | 33.14 | q | 41.97 | 50.10 | 50.03 | 44.43 | b | 27.93 | c | 19.76 | i | 18.00 | r | 42.89 | g | |||
1947 | ----- | z | 15.00 | o | 17.54 | e | 26.67 | 37.68 | 42.07 | 49.68 | 50.77 | 40.30 | g | ----- | z | ----- | z | ----- | z | 37.40 | f | |||||
1948 | ----- | z | ----- | z | ----- | z | 32.27 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | 35.43 | x | 46.00 | r | 51.39 | h | ----- | z | ----- | z | ----- | z | 13.80 | t | ----- | z | ----- | z |
1950 | 10.20 | u | 14.19 | l | 16.13 | p | ----- | z | 28.70 | h | 38.54 | b | 50.80 | a | 43.32 | f | 35.52 | a | 31.89 | d | 15.65 | d | 10.48 | f | 34.48 | g |
1951 | 8.39 | h | 14.63 | a | 19.30 | k | 28.33 | l | 31.17 | g | 34.90 | j | 49.36 | c | 49.17 | m | 36.00 | q | 28.33 | j | 18.56 | l | 15.84 | f | 31.99 | j |
1952 | 19.10 | k | 14.62 | p | 17.58 | s | 26.50 | h | 32.69 | o | 41.06 | l | 47.79 | l | 47.11 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | 13.82 | i | 8.92 | p | 15.83 | y | ----- | z | 30.44 | d | 40.10 | 47.87 | 47.25 | o | ----- | z | 26.17 | y | 11.91 | s | 6.12 | e | 31.13 | h | ||
1954 | 7.00 | o | ----- | z | 18.86 | x | 22.38 | v | 34.87 | h | 37.89 | l | 52.21 | q | 49.47 | l | 43.60 | o | 29.65 | n | 17.07 | b | 10.65 | 13.86 | j | |
1955 | 10.83 | a | 9.05 | g | 17.30 | a | 22.36 | b | 34.20 | a | 38.21 | b | 50.04 | e | 51.43 | c | 35.28 | l | 29.71 | 18.60 | j | 13.43 | a | 29.72 | c | |
1956 | 13.19 | d | 4.93 | 14.16 | 21.89 | b | 30.83 | b | 45.03 | 48.32 | 44.74 | 38.77 | 27.10 | 9.58 | f | 3.65 | e | 26.60 | a | |||||||
1957 | 18.97 | 26.24 | g | 23.42 | e | 24.60 | 32.42 | 41.23 | ----- | z | 50.74 | 36.83 | 33.07 | a | 18.07 | 16.92 | g | 31.04 | c | |||||||
1958 | 9.52 | 19.89 | 21.94 | 26.30 | 34.26 | 43.67 | 47.19 | 48.35 | 43.72 | a | 31.53 | a | 18.10 | a | 11.17 | b | 29.64 | |||||||||
1959 | 9.06 | 14.22 | a | 14.19 | 28.10 | 31.00 | 42.73 | 49.42 | 50.23 | 35.17 | 29.68 | 20.33 | 17.10 | 28.44 | ||||||||||||
1960 | 8.61 | 17.33 | h | 21.84 | 25.83 | 30.27 | a | 41.63 | 49.00 | 48.29 | 42.33 | 30.61 | 19.37 | 13.61 | 30.13 | a | ||||||||||
1961 | 12.77 | 15.93 | 21.55 | 25.23 | 31.29 | 42.20 | 49.23 | 49.13 | 38.97 | 27.29 | 21.83 | f | 13.13 | 29.70 | a | |||||||||||
1962 | 16.70 | a | 21.82 | 16.29 | 26.87 | 32.00 | 38.10 | 50.94 | 44.77 | 44.03 | 30.74 | 21.53 | 18.74 | 30.21 | ||||||||||||
1963 | 9.64 | c | 16.50 | 14.96 | d | 22.07 | 31.35 | 35.57 | 47.52 | 48.32 | 42.13 | 28.26 | 16.97 | 4.87 | 26.51 | |||||||||||
1964 | 0.61 | 0.76 | 13.81 | 20.87 | 31.71 | 37.87 | 49.26 | 46.71 | 42.47 | 26.45 | 17.13 | 13.23 | 25.07 | |||||||||||||
1965 | 14.73 | e | 10.00 | d | 15.10 | k | 21.57 | b | 28.87 | 38.00 | 51.52 | 47.90 | 42.50 | 27.68 | 20.70 | 15.03 | 28.95 | a | ||||||||
1966 | 8.68 | 9.43 | 20.55 | 26.47 | 33.35 | 40.83 | 52.00 | 49.10 | 41.13 | 26.00 | 18.20 | 10.71 | 28.04 | |||||||||||||
1967 | 8.10 | 14.96 | 21.26 | 26.80 | 29.58 | 41.67 | 51.90 | 47.03 | 43.60 | 29.55 | 21.67 | 12.61 | 29.06 | |||||||||||||
1968 | 8.29 | 22.48 | 22.58 | 25.67 | 31.45 | 38.27 | 49.03 | 47.74 | 36.27 | 28.13 | 18.17 | a | 8.42 | 28.04 | ||||||||||||
1969 | 20.23 | 16.50 | 16.26 | 23.70 | 32.65 | 39.00 | 52.39 | 52.10 | 43.30 | 31.65 | 19.93 | 17.10 | 30.40 | |||||||||||||
1970 | 8.26 | 19.71 | 21.55 | 20.87 | 31.81 | 41.13 | 51.23 | 49.03 | 40.47 | 26.94 | 15.77 | ----- | z | 29.70 | a | |||||||||||
1971 | 7.71 | 14.11 | 17.06 | 22.93 | 28.03 | a | 39.93 | 49.74 | 48.77 | 40.97 | 32.16 | 19.31 | a | 16.81 | 28.13 | |||||||||||
1972 | 12.74 | 14.48 | 22.52 | 22.07 | 30.45 | 41.80 | 49.42 | 48.65 | 41.87 | 37.19 | 17.67 | 15.42 | 29.52 | |||||||||||||
1973 | 12.74 | 20.18 | 20.58 | 20.77 | 34.00 | a | 39.63 | 48.48 | 46.55 | 38.40 | 25.00 | 16.37 | c | 9.90 | 27.72 | |||||||||||
1974 | 16.93 | a | 8.39 | 22.97 | 23.03 | 33.65 | 42.90 | 49.97 | 47.23 | 41.03 | 35.68 | 19.23 | ----- | z | 31.00 | a | ||||||||||
1975 | 11.03 | ----- | z | 20.77 | 22.07 | b | 28.97 | a | 36.85 | c | 50.29 | c | 46.70 | h | 41.73 | d | 28.28 | f | 17.04 | d | 14.26 | 27.00 | c | |||
1976 | 11.12 | e | 21.43 | f | 17.60 | k | 24.06 | l | 32.59 | d | 39.11 | b | 49.00 | b | 46.31 | b | 39.63 | k | 27.26 | h | 17.78 | g | 10.14 | i | 35.63 | g |
1977 | 10.78 | m | 15.63 | i | 17.46 | c | 24.93 | b | 30.00 | a | 43.15 | c | 52.23 | a | 50.92 | e | 42.68 | b | ----- | z | ----- | z | ----- | z | 37.34 | e |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | 16.46 | e | 14.23 | b | 20.14 | b | 24.43 | 33.58 | 40.33 | 47.73 | a | 45.23 | a | ----- | z | ----- | z | ----- | z | 13.09 | i | 30.27 | d | |||
1980 | 14.54 | g | 19.92 | d | 19.68 | 23.15 | c | 30.69 | e | 40.00 | a | 49.03 | 48.10 | a | 42.04 | e | 25.62 | b | 15.04 | g | 13.32 | i | 33.14 | c | ||
1981 | 16.50 | k | 14.70 | h | 22.18 | i | 28.67 | 35.37 | a | 44.86 | a | 53.32 | c | 47.97 | a | 41.87 | 33.00 | f | 16.75 | n | 12.52 | h | 42.01 | f | ||
1982 | 14.68 | l | 20.46 | o | 20.73 | i | 25.21 | f | 32.03 | 36.37 | 49.42 | 51.57 | a | 44.25 | b | 24.36 | f | 24.12 | d | 13.67 | m | 39.63 | f | |||
1983 | 15.50 | k | 17.95 | f | 23.82 | c | 23.78 | g | 31.14 | b | 37.50 | d | 49.22 | d | 50.64 | f | 46.73 | d | 34.88 | g | 22.22 | c | 18.05 | k | 35.11 | f |
1984 | 13.62 | j | 10.77 | c | 18.45 | b | 23.23 | d | 35.94 | 42.28 | a | 50.23 | 51.71 | 40.80 | e | 31.56 | f | 19.15 | c | 17.00 | h | 32.50 | c | |||
1985 | 17.12 | f | 15.48 | g | 23.55 | b | 28.77 | 35.77 | 42.52 | a | 50.55 | 47.76 | b | 39.90 | 31.97 | 23.33 | 12.63 | a | 33.68 | b | ||||||
1986 | 15.25 | c | 17.08 | b | 23.81 | 27.57 | 33.97 | 45.23 | 50.06 | 50.50 | a | 38.03 | a | 28.31 | b | 24.20 | 14.96 | d | 30.75 | |||||||
1987 | 9.96 | c | 17.85 | a | 19.37 | a | 26.77 | 33.83 | a | 41.14 | b | 46.31 | e | 49.29 | 38.11 | l | 31.97 | 18.17 | 11.50 | g | 29.47 | b | ||||
1988 | 8.97 | b | 19.70 | b | 21.86 | b | 28.63 | 34.67 | a | 43.61 | b | 49.97 | a | 52.52 | d | 38.67 | 33.58 | 19.23 | 14.30 | a | 30.48 | |||||
1989 | 14.10 | j | 19.21 | i | 21.10 | b | 28.00 | 33.50 | a | 39.69 | d | 48.80 | a | 51.14 | b | 40.15 | d | 27.60 | a | 16.77 | d | 9.54 | c | 31.63 | b | |
1990 | 9.74 | d | 13.96 | a | 22.28 | b | 28.19 | c | 32.62 | b | 44.56 | c | 50.37 | a | 47.35 | e | 46.14 | h | 26.21 | c | 20.77 | h | 11.38 | b | 28.66 | b |
1991 | 17.61 | m | 20.13 | e | 19.57 | c | 22.30 | c | 30.23 | e | 39.41 | a | 49.74 | 50.13 | a | 42.36 | h | 27.27 | e | 20.26 | c | 15.64 | i | 31.01 | c | |
1992 | 7.00 | l | 20.04 | d | 23.36 | c | 27.76 | a | 38.97 | a | 38.93 | a | 46.63 | a | 46.04 | e | 37.24 | a | 28.21 | c | 11.64 | b | 9.46 | c | 29.84 | a |
1993 | 18.11 | l | 19.38 | g | 18.58 | g | 21.24 | e | 33.36 | f | 37.31 | d | 47.48 | d | 51.27 | e | 35.62 | i | 27.57 | h | 17.30 | j | 9.96 | e | 33.45 | g |
1994 | 9.82 | i | 13.18 | k | 20.91 | h | 22.65 | j | 30.84 | f | 44.17 | f | 47.29 | c | 47.50 | c | 40.08 | d | 25.16 | f | 20.35 | g | 16.30 | h | 44.95 | i |
1995 | 13.36 | f | 19.40 | c | 20.73 | e | 21.05 | j | 27.19 | d | 35.72 | a | 42.85 | e | 50.37 | d | 39.04 | f | 22.13 | p | 18.47 | k | 11.70 | k | 32.71 | f |
1996 | 8.12 | w | 20.00 | s | 16.50 | w | 23.78 | g | 33.67 | d | ----- | z | 51.63 | d | 48.83 | m | 39.00 | o | 27.52 | d | 18.56 | u | 0.33 | y | 37.60 | i |
1997 | 10.38 | r | 11.00 | t | ----- | z | 24.44 | c | 34.84 | 37.73 | d | 48.81 | d | 50.14 | q | 44.94 | m | 26.43 | x | ----- | z | ----- | z | 36.46 | h | |
1998 | 12.31 | r | 16.74 | i | 19.17 | h | 22.29 | m | 29.33 | j | 34.13 | g | 47.62 | o | ----- | z | ----- | z | ----- | z | 18.88 | n | 18.95 | k | ----- | z |
1999 | 11.81 | d | 9.82 | k | 17.97 | a | 25.55 | j | ----- | z | 38.43 | i | 59.78 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.89 | j |
2000 | ----- | z | 11.86 | v | 20.33 | v | 26.79 | k | 35.58 | e | ----- | z | 48.73 | p | ----- | z | 39.71 | m | ----- | z | 17.87 | g | ----- | z | 35.58 | k |
2001 | 11.62 | w | 15.85 | a | ----- | z | 26.50 | j | 34.61 | h | 43.23 | h | 52.22 | h | 48.00 | r | 40.82 | m | 27.84 | l | 22.92 | e | 5.68 | i | 19.39 | j |
2002 | 11.81 | o | 12.50 | j | 16.00 | k | 27.25 | n | 29.82 | n | 40.92 | r | 50.90 | k | 45.60 | p | 44.50 | v | 26.78 | v | 15.12 | v | 17.00 | w | ----- | z |
2003 | 15.09 | t | 10.77 | o | 17.64 | q | 23.23 | d | 31.05 | i | 40.41 | m | 52.24 | j | 49.50 | m | 37.89 | k | 32.64 | q | 23.33 | u | 10.67 | m | 23.23 | k |
2004 | 13.38 | w | 11.43 | v | 26.31 | r | 26.89 | k | 30.62 | b | 39.52 | c | 47.96 | d | 45.46 | e | 36.82 | m | 33.86 | q | 21.42 | r | 13.62 | o | 40.89 | h |
2005 | 15.29 | x | ----- | z | 17.00 | t | 21.17 | r | 34.27 | e | 38.38 | a | 47.65 | e | 49.00 | x | 40.21 | f | 29.83 | m | 17.08 | r | 6.63 | l | 40.10 | i |
2006 | 5.33 | s | 12.39 | e | 17.50 | e | 25.88 | d | 33.22 | d | 44.45 | a | 52.00 | i | 49.43 | j | 38.24 | e | 28.69 | e | 19.14 | p | 10.08 | s | 28.63 | e |
2007 | 14.95 | j | 15.44 | c | 19.09 | h | 26.45 | h | 34.83 | g | 41.52 | e | 50.74 | h | ----- | z | 34.27 | d | 28.08 | g | 21.43 | g | 16.62 | g | 30.41 | i |
2008 | 16.39 | m | 16.29 | o | 15.86 | b | 20.85 | c | 28.57 | c | 40.27 | d | 51.48 | f | 46.00 | j | 39.09 | s | ----- | z | ----- | z | ----- | z | 26.39 | h |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.00 | 15.66 | 19.83 | 24.80 | 32.52 | 40.47 | 49.33 | 48.73 | 40.66 | 29.41 | 19.08 | 12.71 | 28.89 | |||||||||||||
S.D. | 4.08 | 4.89 | 3.06 | 2.75 | 2.63 | 2.65 | 1.79 | 2.04 | 2.77 | 2.85 | 2.98 | 3.94 | 1.70 | |||||||||||||
SKEW | -0.13 | -0.81 | -0.32 | -0.07 | 0.42 | 0.22 | -0.66 | -0.07 | -0.35 | 0.75 | -0.30 | -0.30 | -0.62 | |||||||||||||
MAX | 20.23 | 25.64 | 26.11 | 29.00 | 38.97 | 47.13 | 53.32 | 52.52 | 46.73 | 37.19 | 24.25 | 20.43 | 31.29 | |||||||||||||
MIN | 0.61 | 0.76 | 13.81 | 20.57 | 27.19 | 35.57 | 42.85 | 44.74 | 34.27 | 25.00 | 11.64 | 3.65 | 25.07 | |||||||||||||
YRS | 33 | 37 | 44 | 47 | 53 | 56 | 55 | 48 | 42 | 38 | 36 | 31 | 15 |