YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | ----- | z | ----- | z | ----- | z | 36.88 | f | 39.23 | a | 43.53 | 46.87 | 44.42 | 43.60 | 39.20 | a | 34.83 | 23.07 | a | 39.34 | d | |||||
1915 | 25.32 | 30.18 | 32.68 | 36.57 | 41.55 | 42.96 | b | 48.13 | 46.45 | 42.21 | a | 39.70 | a | 30.07 | 29.06 | 37.07 | ||||||||||
1916 | 9.87 | 25.76 | 29.97 | 33.83 | 36.77 | 43.40 | 46.77 | 45.81 | 41.77 | 32.06 | 28.04 | b | 23.45 | 33.13 | ||||||||||||
1917 | 23.45 | 22.89 | 26.13 | 32.67 | 38.35 | 41.63 | 43.48 | 45.42 | 43.07 | 36.00 | b | 35.07 | c | 29.87 | 34.84 | |||||||||||
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.57 | q | 34.50 | r | 22.75 | s | ----- | z |
1919 | 28.52 | d | 28.08 | d | 29.50 | c | 33.44 | e | 36.71 | c | 41.07 | o | 44.43 | j | 44.25 | g | 38.60 | t | 33.27 | i | 30.45 | j | 20.69 | b | 29.49 | f |
1920 | 26.23 | i | 26.07 | a | 29.32 | c | 31.15 | c | 33.79 | g | 41.47 | k | 47.31 | b | 44.96 | f | 42.29 | m | ----- | z | 33.56 | c | 31.44 | d | 33.14 | f |
1921 | 27.16 | f | 26.33 | m | 30.42 | 31.23 | 37.61 | h | 42.33 | i | 42.42 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.69 | i | ||
1922 | 20.60 | k | 18.68 | c | 27.87 | a | 29.89 | c | 36.25 | o | ----- | z | 48.57 | x | 48.19 | d | 42.06 | n | 36.53 | p | 26.00 | i | 15.58 | g | 31.16 | h |
1923 | 23.40 | f | 22.53 | i | 28.05 | l | 31.63 | c | 38.04 | g | 42.80 | j | ----- | z | ----- | z | 40.08 | r | 31.64 | q | 32.80 | j | ----- | z | 31.63 | k |
1924 | 23.33 | m | 31.90 | 27.12 | f | 30.31 | n | 38.50 | i | 40.83 | f | 41.10 | u | ----- | z | ----- | z | ----- | z | 28.30 | c | 20.74 | h | 30.10 | j | |
1925 | 28.00 | b | 33.75 | p | 29.76 | j | ----- | z | 40.72 | f | 42.32 | k | ----- | z | ----- | z | 41.67 | l | ----- | z | ----- | z | ----- | z | 28.00 | k |
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 | 38.11 | c | 31.14 | c | 34.63 | j |
1935 | 24.00 | c | 28.82 | 29.94 | 30.90 | 37.52 | 45.18 | b | 49.07 | b | 47.61 | 44.26 | c | 34.67 | j | 28.71 | b | 29.96 | g | 36.60 | b | |||||
1936 | 27.92 | g | 14.00 | e | 27.54 | c | 35.33 | 43.43 | a | 47.60 | 47.59 | b | 47.55 | 42.03 | 37.94 | 28.97 | 29.55 | 36.50 | a | |||||||
1937 | 8.48 | 22.43 | 31.29 | 34.80 | 38.23 | 45.87 | 48.03 | 47.45 | 44.97 | 39.73 | a | 32.10 | 27.52 | 35.07 | ||||||||||||
1938 | 27.48 | 26.64 | 29.90 | 34.70 | 37.80 | a | 44.13 | 47.42 | 44.67 | a | 46.47 | 36.04 | e | 28.72 | a | 27.77 | 35.98 | |||||||||
1939 | 31.35 | 23.83 | e | 30.33 | m | 35.19 | c | 38.65 | e | 44.31 | a | 45.87 | a | 45.94 | 43.13 | 37.63 | a | 35.53 | 33.06 | 37.68 | a | |||||
1940 | 28.19 | 30.68 | a | 34.87 | 37.19 | d | 42.19 | 43.83 | 47.94 | n | 47.77 | 49.31 | d | 41.81 | 29.77 | 30.68 | 37.84 | a | ||||||||
1941 | 29.52 | 31.57 | 34.16 | 36.37 | 41.03 | a | 45.47 | o | 63.26 | l | ----- | z | ----- | z | 49.78 | v | ----- | z | ----- | z | 34.53 | g | ||||
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.60 | a | 38.24 | a | 37.21 | b | 25.81 | c | 24.03 | 34.98 | g | |
1943 | 17.71 | 28.36 | 28.16 | 36.33 | 37.97 | 43.40 | 49.03 | b | 48.68 | 42.70 | 44.40 | p | ----- | z | 25.93 | d | 35.83 | b | ||||||||
1944 | 27.23 | a | 27.88 | c | 30.39 | 37.07 | 38.00 | b | 45.88 | e | 48.57 | a | 48.68 | 44.47 | 39.03 | 31.96 | d | 26.24 | j | 38.11 | a | |||||
1945 | 27.62 | b | 30.25 | 28.96 | c | 32.26 | c | 40.94 | 44.11 | b | 46.74 | 47.47 | a | ----- | z | ----- | z | ----- | z | ----- | z | 37.29 | d | |||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.45 | i | 26.67 | l | ----- | z | ----- | z |
1947 | ----- | z | 29.00 | o | 31.95 | j | 36.27 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.08 | g | ----- | z | 31.25 | k | ----- | z |
1948 | 26.00 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | 35.12 | v | 40.00 | q | 42.83 | g | 46.25 | g | 55.19 | d | ----- | z | ----- | z | ----- | z | ----- | z | 55.19 | k |
1950 | 6.37 | a | 26.75 | 29.41 | b | 31.90 | 37.30 | a | 47.04 | e | 48.13 | 46.73 | a | 42.58 | f | 35.31 | o | 30.80 | j | 30.37 | l | 34.20 | d | |||
1951 | 24.70 | d | 28.04 | e | 26.42 | 32.37 | 40.50 | a | 44.00 | e | 48.70 | a | 44.77 | 42.34 | a | 33.29 | q | 28.19 | n | 25.67 | j | 36.87 | c | |||
1952 | 20.92 | e | 26.25 | i | 28.00 | l | 33.96 | d | 40.60 | a | 43.05 | h | 46.74 | 47.60 | a | 45.18 | m | 38.12 | g | 31.00 | s | 27.44 | m | 37.97 | g | |
1953 | 30.96 | g | 29.36 | 31.65 | 36.13 | 41.35 | 45.76 | a | 49.97 | a | 50.23 | 46.38 | a | 40.19 | e | 34.29 | f | 32.81 | 40.38 | b | ||||||
1954 | 21.03 | a | 30.30 | a | 27.23 | 32.27 | 38.71 | q | 44.21 | k | 47.10 | 49.48 | 45.30 | 37.61 | 37.72 | a | 30.03 | 35.81 | b | |||||||
1955 | 28.87 | 26.25 | 26.40 | a | 31.33 | 35.77 | 45.93 | 49.90 | 48.69 | b | 44.30 | c | ----- | z | 25.00 | l | 24.46 | c | 36.19 | b | ||||||
1956 | 26.07 | a | 26.57 | a | 28.65 | 34.03 | 40.56 | f | 46.71 | i | 49.29 | 50.03 | b | 44.50 | h | 37.60 | k | 30.60 | j | 24.58 | s | 35.77 | f | |||
1957 | 15.77 | i | 26.74 | e | 32.74 | 36.10 | 45.39 | 44.00 | p | 45.10 | a | 48.03 | 46.57 | b | 37.31 | b | 33.47 | 32.29 | 38.37 | b | ||||||
1958 | 33.52 | 35.93 | 31.74 | 36.33 | c | 43.35 | 50.55 | a | 53.30 | d | 49.71 | 44.70 | 39.48 | 30.00 | b | 31.76 | f | 40.78 | a | |||||||
1959 | 29.16 | 29.72 | c | 32.45 | 34.30 | 39.07 | a | 46.53 | 49.77 | a | 46.74 | d | 45.07 | b | 39.12 | e | 30.88 | e | 30.89 | d | 37.81 | |||||
1960 | 24.82 | c | 28.88 | c | 29.53 | a | 34.79 | a | 39.52 | d | 45.73 | 49.55 | 49.70 | a | 44.19 | c | 41.58 | e | 33.07 | a | 29.38 | b | 37.56 | |||
1961 | 34.57 | c | 34.67 | d | 34.19 | ----- | z | 42.70 | d | 48.80 | 50.71 | 50.64 | c | 41.44 | c | 36.61 | 30.30 | 31.33 | a | 39.63 | a | |||||
1962 | 27.32 | c | 28.44 | c | 28.57 | a | 37.80 | 42.11 | d | 45.40 | 48.06 | 49.26 | 43.60 | 40.29 | 37.52 | a | 34.77 | 38.60 | ||||||||
1963 | 23.97 | 32.19 | a | 31.69 | b | 36.87 | 40.96 | c | 49.07 | 49.43 | a | 49.43 | c | ----- | z | ----- | z | ----- | z | ----- | z | 39.20 | d | |||
1964 | ----- | z | ----- | z | 32.71 | x | ----- | z | ----- | z | 45.64 | e | 50.06 | 48.35 | 44.54 | d | ----- | z | ----- | z | ----- | z | 47.15 | h | ||
1965 | ----- | z | ----- | z | 28.68 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.75 | b | 40.15 | k | 34.95 | j | ----- | z | 35.21 | j | |
1966 | ----- | z | ----- | z | 31.57 | a | 34.62 | d | 39.62 | b | 45.57 | 49.60 | a | 49.13 | 47.53 | 38.39 | 35.31 | a | 33.77 | 40.51 | b | |||||
1967 | 32.45 | 32.71 | 30.48 | 33.57 | 41.90 | 49.03 | 49.58 | 49.94 | 48.60 | 43.07 | c | 34.92 | f | 26.00 | l | 41.13 | b | |||||||||
1968 | 27.12 | g | 32.34 | 36.07 | b | 35.57 | 41.72 | b | 47.53 | 49.65 | 49.26 | 45.76 | a | ----- | z | ----- | z | ----- | z | 42.24 | d | |||||
1969 | 16.90 | 28.82 | 30.72 | b | ----- | z | 46.24 | j | 52.69 | d | 49.57 | a | 48.48 | 48.19 | c | 37.19 | 37.43 | g | 30.93 | c | 38.17 | c | ||||
1970 | 26.15 | e | 30.96 | c | 29.68 | 33.27 | 38.40 | a | 47.86 | b | 50.37 | a | 48.80 | a | 43.32 | b | 37.19 | 32.90 | 29.73 | i | 38.08 | a | ||||
1971 | 25.77 | e | 30.00 | 30.32 | c | 35.23 | 42.41 | b | 46.38 | a | 49.55 | 52.23 | 44.61 | b | 39.24 | f | 36.43 | 28.48 | 38.31 | a | ||||||
1972 | 24.81 | 30.19 | b | 34.00 | 31.04 | b | 42.28 | m | 47.72 | a | 49.90 | a | 50.50 | a | 42.83 | g | 38.31 | r | 33.65 | g | 23.37 | a | 36.44 | d | ||
1973 | 24.71 | 30.11 | 33.29 | ----- | z | ----- | z | 46.03 | a | 46.30 | h | 45.52 | 42.93 | 37.00 | 29.67 | 32.74 | 35.78 | c | ||||||||
1974 | 24.58 | 32.04 | a | 31.35 | 36.58 | d | 38.81 | 44.46 | f | 50.31 | o | 49.55 | ----- | z | ----- | z | ----- | z | ----- | z | 35.48 | f | ||||
1975 | 27.35 | e | 24.93 | 29.00 | 28.07 | p | ----- | z | 45.93 | o | 52.39 | 48.39 | 43.33 | c | 38.58 | 31.93 | 26.97 | a | 35.87 | c | ||||||
1976 | 29.32 | 28.96 | a | 27.72 | b | 32.14 | a | 39.63 | a | 42.23 | 48.10 | 50.52 | 46.17 | 37.47 | a | 31.36 | b | 30.87 | 37.04 | |||||||
1977 | 23.58 | 31.36 | 31.68 | 35.68 | e | 39.03 | 47.40 | 48.58 | 52.06 | 44.14 | a | 35.07 | c | 28.07 | 24.57 | a | 36.77 | |||||||||
1978 | 28.79 | c | 30.00 | b | 32.23 | 34.40 | 38.55 | 46.17 | 50.97 | b | 49.27 | a | 45.20 | ----- | z | ----- | z | 24.46 | r | 39.51 | c | |||||
1979 | ----- | z | 26.00 | o | 31.44 | d | 36.26 | g | 41.40 | k | 43.72 | a | 51.00 | d | 50.19 | 47.42 | f | 40.69 | o | 29.09 | h | 33.33 | p | 44.09 | h | |
1980 | 19.61 | h | 31.05 | i | 32.37 | d | 39.67 | i | 44.22 | h | 51.06 | m | ----- | z | ----- | z | ----- | z | 36.68 | f | 33.76 | i | 32.68 | i | 32.37 | k |
1981 | 30.29 | g | 30.42 | d | 30.34 | b | 32.92 | f | 41.64 | c | 44.57 | 49.71 | g | 50.28 | b | 43.97 | 34.00 | a | 33.50 | 29.26 | 37.55 | c | ||||
1982 | 25.15 | d | 27.88 | c | 30.27 | a | 31.57 | 40.18 | c | 49.00 | 51.21 | c | 48.76 | b | 47.33 | f | 37.72 | b | 28.81 | d | 28.78 | d | 36.30 | a | ||
1983 | 32.94 | n | 32.50 | j | 34.00 | l | 35.20 | j | 43.58 | l | 44.57 | i | 48.29 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.29 | k |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.94 | 28.47 | 30.49 | 34.10 | 39.97 | 45.95 | 48.65 | 48.58 | 44.33 | 38.08 | 31.95 | 28.84 | 36.39 | |||||||||||||
S.D. | 6.19 | 3.92 | 2.28 | 2.11 | 2.17 | 2.35 | 2.09 | 2.08 | 2.20 | 2.31 | 3.25 | 3.56 | 1.64 | |||||||||||||
SKEW | -1.45 | -1.38 | 0.21 | -0.16 | 0.27 | 0.60 | -0.68 | 0.28 | 0.02 | -0.24 | 0.27 | -0.52 | -0.66 | |||||||||||||
MAX | 34.57 | 35.93 | 36.07 | 37.80 | 45.39 | 52.69 | 53.30 | 55.19 | 49.31 | 43.07 | 38.11 | 34.77 | 38.60 | |||||||||||||
MIN | 6.37 | 14.00 | 26.13 | 29.89 | 35.77 | 41.63 | 42.42 | 44.42 | 38.24 | 32.06 | 25.81 | 20.69 | 33.13 | |||||||||||||
YRS | 38 | 44 | 47 | 42 | 38 | 38 | 43 | 47 | 37 | 29 | 31 | 32 | 10 |