YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | 27.79 | g | 25.04 | 30.68 | 38.48 | a | 45.79 | 59.43 | a | 65.69 | 62.19 | 54.90 | 45.36 | c | 34.10 | 11.27 | a | 42.99 | a | |||||||
1910 | 23.69 | 21.77 | 38.66 | 42.12 | 50.52 | 59.72 | a | 64.29 | 61.32 | 56.97 | 43.32 | 35.45 | 23.74 | f | 45.26 | a | ||||||||||
1911 | 27.64 | b | 25.71 | 35.69 | 42.47 | 50.35 | 57.73 | 61.67 | a | 59.58 | ----- | z | ----- | z | ----- | z | ----- | z | 45.11 | d | ||||||
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.11 | 31.27 | 16.55 | 29.31 | i | |||
1913 | 14.67 | a | 23.10 | b | 30.35 | 40.34 | a | 50.97 | 57.25 | 62.90 | a | 62.42 | 51.57 | 41.47 | 35.23 | 12.47 | a | 40.23 | ||||||||
1914 | 24.35 | a | 28.94 | a | 37.13 | a | ----- | z | 52.35 | k | 59.08 | 62.73 | 60.79 | 56.08 | 43.65 | 32.35 | 16.74 | 42.18 | b | |||||||
1915 | 15.77 | i | 25.29 | b | 31.02 | 43.84 | a | 46.92 | 57.72 | 62.15 | 60.13 | 53.63 | 43.40 | a | 30.15 | 22.47 | 43.34 | a | ||||||||
1916 | 24.92 | a | 29.09 | 36.84 | 41.72 | a | 48.82 | 57.67 | 64.00 | 61.43 | a | 54.22 | 43.27 | 30.67 | 18.42 | 42.59 | ||||||||||
1917 | 18.16 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.16 | k |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1919 | ----- | z | ----- | z | ----- | 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 | 43.63 | d | 50.53 | m | 57.73 | b | 63.68 | 59.87 | 54.48 | a | 45.07 | a | 26.97 | 19.81 | 46.40 | d | ||||
1926 | 9.85 | a | 27.18 | 32.57 | b | 42.75 | 49.10 | 58.67 | 61.56 | 61.50 | 56.80 | c | 45.88 | c | 33.62 | 22.44 | 41.82 | |||||||||
1927 | 27.75 | a | 31.22 | a | 32.77 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.58 | i |
1928 | 22.06 | w | 26.98 | a | 36.72 | a | 41.63 | 50.55 | 59.91 | b | 62.34 | 59.81 | 54.84 | a | 47.23 | 24.16 | a | 16.10 | 43.66 | a | ||||||
1929 | 13.76 | 16.50 | c | 26.92 | ----- | z | ----- | z | 54.68 | 60.16 | ----- | z | ----- | z | ----- | z | 17.60 | a | 18.07 | c | 29.67 | e | ||||
1930 | 12.95 | a | 25.66 | ----- | z | ----- | z | 45.35 | a | ----- | z | 59.18 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.78 | h | ||
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 | 44.43 | o | 49.94 | 61.33 | 64.92 | 64.69 | 56.75 | 43.74 | 33.00 | a | 19.61 | 49.25 | d | |||||||
1961 | 15.56 | 26.12 | 33.29 | b | 40.77 | 52.47 | b | 61.50 | 64.24 | 62.52 | 53.11 | c | 43.53 | 28.90 | a | 16.26 | 41.52 | |||||||||
1962 | 17.65 | 29.77 | 28.16 | 44.33 | 48.95 | 57.98 | 62.63 | 61.94 | 56.00 | 47.20 | a | 35.05 | 27.71 | 43.11 | ||||||||||||
1963 | 14.94 | 26.07 | 32.40 | 42.78 | 54.02 | 59.80 | 67.47 | a | 63.21 | 58.66 | a | 49.73 | 32.78 | 20.69 | 43.55 | |||||||||||
1964 | 16.98 | 18.81 | 26.05 | 38.83 | 51.27 | 58.98 | a | 66.20 | a | 61.19 | 55.20 | 45.90 | 28.30 | 13.71 | 40.12 | |||||||||||
1965 | 20.02 | 22.54 | 27.72 | a | 40.67 | 49.73 | 58.30 | 65.37 | 60.63 | 52.90 | 46.10 | 36.13 | 24.19 | 42.02 | ||||||||||||
1966 | 14.52 | a | 16.48 | a | 34.34 | 43.07 | a | 52.62 | a | 58.37 | 66.90 | 62.15 | 55.63 | 44.60 | 34.82 | 22.34 | 42.15 | |||||||||
1967 | 21.50 | 24.70 | 38.00 | 41.69 | a | 48.40 | 57.28 | 65.65 | a | 59.66 | 53.95 | 45.24 | 34.22 | 17.06 | 42.28 | |||||||||||
1968 | 13.65 | 25.50 | 32.48 | 38.00 | 49.23 | 60.87 | 62.97 | a | 60.55 | 54.15 | 46.05 | 30.83 | 19.98 | 41.19 | ||||||||||||
1969 | 26.15 | 25.57 | 28.76 | 44.27 | 52.77 | 56.92 | 66.53 | 65.48 | 55.08 | 40.34 | 30.87 | 21.23 | a | 42.83 | ||||||||||||
1970 | 19.81 | 29.04 | 30.26 | 36.80 | 50.58 | 57.00 | 65.34 | 64.00 | 53.58 | 39.40 | 33.53 | 23.82 | 41.93 | |||||||||||||
1971 | 20.89 | 25.11 | 32.29 | 39.78 | 46.92 | 58.62 | 63.16 | 62.74 | 53.15 | 42.27 | 29.80 | 19.44 | 41.18 | |||||||||||||
1972 | 19.97 | a | 29.20 | a | 37.98 | 43.67 | 50.73 | 60.78 | a | 64.61 | 61.69 | 54.60 | 45.77 | a | 21.93 | 14.32 | a | 42.10 | ||||||||
1973 | 10.05 | a | 18.27 | 31.29 | 36.87 | 49.32 | 58.28 | 62.29 | 62.00 | c | 52.48 | a | 44.38 | b | 34.27 | 19.90 | 39.95 | |||||||||
1974 | 12.27 | c | 14.31 | b | 35.64 | c | 37.37 | 53.79 | 60.38 | 62.21 | 58.42 | a | 52.95 | b | 44.13 | d | 28.25 | b | 12.95 | a | 39.39 | |||||
1975 | 8.23 | 21.46 | 30.59 | c | 36.32 | 47.00 | 56.98 | a | 62.76 | 59.80 | a | 51.48 | f | ----- | z | 18.68 | m | 18.30 | i | 40.39 | d | |||||
1976 | 14.60 | 27.76 | 30.37 | 40.00 | b | 50.95 | 59.05 | 65.14 | c | 60.76 | 55.15 | 40.19 | 29.48 | 17.67 | b | 40.93 | ||||||||||
1977 | 14.82 | 24.07 | 30.08 | 43.97 | 51.91 | b | 62.22 | a | 65.57 | a | 64.24 | 56.12 | 44.79 | 32.72 | 26.11 | 43.05 | ||||||||||
1978 | 24.58 | 26.36 | 37.44 | 43.52 | 47.92 | 60.88 | 64.68 | 61.89 | 56.37 | d | 47.77 | 35.45 | 14.50 | 43.45 | ||||||||||||
1979 | 10.37 | a | 15.75 | 29.54 | h | 42.95 | 50.32 | 58.29 | b | 64.24 | 61.02 | a | 56.80 | 45.58 | 23.12 | 21.26 | 40.88 | a | ||||||||
1980 | 23.79 | 29.76 | 31.18 | c | 39.28 | 48.60 | 62.41 | a | 67.75 | a | 63.97 | 57.50 | 42.65 | 32.23 | b | 31.18 | 44.19 | |||||||||
1981 | 26.06 | 28.52 | 34.35 | h | 48.45 | a | 49.89 | 63.80 | c | 65.79 | 62.45 | i | ----- | z | 44.17 | a | 36.68 | h | 28.90 | p | 46.67 | e | ||||
1982 | 21.05 | i | 24.00 | a | 34.29 | 41.43 | a | 48.90 | a | 58.36 | a | 64.48 | 63.75 | a | 55.48 | a | 41.30 | a | 31.95 | a | 21.83 | a | 44.16 | a | ||
1983 | 19.88 | o | 27.43 | 34.55 | 36.93 | 47.38 | a | 56.88 | a | 65.39 | 64.70 | a | 58.13 | 44.61 | 30.00 | 19.58 | a | 44.14 | a | |||||||
1984 | 7.26 | d | 14.79 | a | 28.40 | a | 38.47 | 54.65 | 58.68 | 66.18 | 63.40 | 57.33 | a | 39.77 | 31.72 | a | 25.03 | 40.47 | ||||||||
1985 | 18.38 | a | 23.85 | a | 34.53 | 44.43 | 51.12 | b | 60.42 | l | 64.87 | d | 64.03 | 51.68 | 44.47 | b | 31.57 | 21.15 | 40.92 | a | ||||||
1986 | 27.03 | 29.89 | a | 37.60 | a | 43.66 | a | 49.95 | 59.88 | 62.55 | c | 62.69 | d | 52.95 | 41.68 | 32.36 | b | 20.87 | d | 43.43 | ||||||
1987 | 18.21 | b | 26.38 | 32.10 | b | 42.73 | 49.73 | 62.03 | 65.29 | 61.29 | b | 53.79 | a | 46.38 | a | 32.19 | i | 18.38 | b | 43.30 | a | |||||
1988 | 9.48 | 22.02 | 30.78 | a | 43.62 | v | 49.45 | 61.05 | 64.58 | 63.47 | 52.95 | 46.77 | 30.22 | 19.90 | a | 40.97 | a | |||||||||
1989 | 17.84 | 23.70 | 38.68 | c | 43.82 | 53.84 | 58.97 | a | 66.45 | a | 62.15 | 57.90 | d | 43.73 | 33.60 | a | 20.41 | d | 43.42 | |||||||
1990 | 18.02 | a | 25.84 | 35.95 | 44.32 | 49.19 | 62.93 | 63.45 | 60.77 | 58.24 | a | 43.77 | 33.08 | 15.90 | a | 42.62 | ||||||||||
1991 | 13.64 | b | 26.84 | 33.31 | 40.30 | 50.82 | 58.95 | 64.03 | 62.82 | 55.50 | 46.29 | 23.43 | c | 8.11 | c | 40.34 | ||||||||||
1992 | 5.48 | 16.16 | 31.37 | 45.73 | 52.89 | 57.88 | 62.03 | 59.92 | 56.00 | 47.13 | 24.29 | a | 12.58 | 39.29 | ||||||||||||
1993 | 16.86 | b | 23.07 | 34.16 | 40.97 | 50.69 | 59.30 | 64.19 | 60.93 | a | 53.50 | 41.73 | 27.36 | b | 20.67 | a | 41.12 | |||||||||
1994 | 22.32 | 22.48 | a | 35.74 | 42.24 | c | 52.16 | 63.28 | 65.37 | 64.78 | k | 56.88 | n | 45.37 | a | 28.80 | 24.45 | 40.22 | b | |||||||
1995 | 24.35 | 35.14 | 36.02 | a | 39.37 | 47.20 | a | 57.70 | 61.90 | a | 65.81 | 55.45 | 43.73 | 34.78 | 26.17 | a | 43.97 | |||||||||
1996 | 21.88 | a | 30.88 | 32.98 | 41.82 | 56.31 | 61.82 | 66.56 | 64.15 | 53.90 | a | 42.77 | 33.23 | 22.47 | 44.06 | |||||||||||
1997 | 19.67 | a | 26.40 | b | 37.29 | 38.52 | 51.08 | 60.03 | 64.35 | 63.55 | a | 58.63 | 44.19 | 29.55 | 12.48 | 42.15 | ||||||||||
1998 | 18.87 | 25.07 | 33.75 | a | 37.93 | 51.92 | 58.83 | a | 66.22 | a | 63.56 | 59.13 | 44.79 | 34.74 | a | 25.94 | 43.40 | |||||||||
1999 | 27.44 | 30.09 | 38.73 | 40.03 | 48.82 | 58.17 | 65.32 | a | 62.52 | a | 54.37 | 44.50 | 35.67 | 22.32 | 44.00 | |||||||||||
2000 | 26.66 | b | 30.98 | b | 35.79 | 45.55 | 54.58 | 62.42 | 65.74 | 64.87 | 57.27 | 44.98 | a | 26.23 | 24.84 | b | 44.99 | |||||||||
2001 | 18.86 | b | 27.31 | b | 35.19 | 44.97 | 52.82 | 61.73 | 65.92 | 61.58 | 56.97 | 45.94 | 34.23 | 21.08 | 43.88 | |||||||||||
2002 | 19.41 | c | 23.39 | a | 32.67 | a | 47.83 | 53.32 | 64.98 | 66.44 | 63.76 | b | 55.48 | 43.77 | 32.77 | f | 20.64 | c | 44.70 | a | ||||||
2003 | 28.11 | 27.04 | 34.79 | b | 44.31 | d | 52.87 | 58.33 | 68.98 | c | 64.59 | b | 53.93 | a | 47.53 | 30.72 | e | 21.50 | 44.39 | |||||||
2004 | 18.48 | c | 17.32 | g | 39.55 | 40.85 | c | 53.61 | 54.16 | e | 62.52 | 59.29 | b | ----- | z | ----- | z | ----- | z | ----- | z | 46.92 | e | |||
2005 | ----- | z | ----- | z | 33.57 | q | 43.48 | f | 52.90 | 60.50 | 68.18 | 63.71 | 58.60 | a | 46.95 | 34.32 | 23.74 | 51.11 | d | |||||||
2006 | 22.56 | 27.09 | 35.47 | 44.75 | b | 54.43 | a | 63.65 | 65.58 | 63.71 | b | 53.79 | a | 43.03 | a | 34.38 | d | 20.38 | b | 44.07 | ||||||
2007 | 14.05 | 26.54 | a | 37.17 | d | 43.80 | 51.94 | 60.48 | c | 65.11 | h | 64.54 | h | 58.46 | g | 45.05 | c | 33.38 | j | 15.87 | a | 36.86 | d | |||
2008 | 14.05 | i | 22.12 | 32.58 | a | 41.45 | a | 49.06 | d | 60.24 | e | 65.95 | a | 64.36 | b | 55.88 | b | 46.02 | b | 35.55 | a | 24.78 | a | 45.27 | a | |
2009 | 22.42 | a | 29.59 | a | 38.98 | a | 41.45 | a | 55.68 | 58.92 | 67.15 | 65.42 | a | 55.59 | b | 42.26 | b | 33.67 | 17.11 | 44.02 | ||||||
2010 | 20.84 | 21.82 | c | 30.85 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.33 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.61 | 25.03 | 33.69 | 41.75 | 50.73 | 59.50 | 64.53 | 62.32 | 55.30 | 44.32 | 31.14 | 19.76 | 42.35 | |||||||||||||
S.D. | 5.76 | 4.41 | 3.35 | 2.77 | 2.46 | 2.16 | 1.96 | 1.80 | 1.90 | 2.18 | 3.99 | 4.49 | 1.53 | |||||||||||||
SKEW | -0.22 | -0.63 | -0.22 | -0.02 | 0.06 | 0.25 | -0.28 | -0.05 | 0.15 | -0.26 | -1.24 | -0.18 | -0.34 | |||||||||||||
MAX | 28.11 | 35.14 | 39.55 | 48.45 | 56.31 | 64.98 | 68.98 | 65.81 | 59.13 | 49.73 | 36.13 | 31.18 | 44.99 | |||||||||||||
MIN | 5.48 | 14.31 | 26.05 | 36.32 | 45.35 | 54.16 | 59.18 | 58.42 | 51.57 | 39.40 | 17.60 | 8.11 | 39.29 | |||||||||||||
YRS | 56 | 60 | 57 | 56 | 59 | 60 | 61 | 57 | 54 | 58 | 55 | 57 | 38 |