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 | ----- | 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 | 56.88 | v | 52.06 | 34.48 | a | 30.68 | c | 39.08 | i | |
1922 | 23.77 | a | 29.78 | a | 36.67 | d | 42.19 | d | 53.93 | c | 65.27 | 70.81 | 70.00 | 62.60 | 46.00 | 34.20 | 31.00 | 47.18 | ||||||||
1923 | 27.06 | 28.96 | 36.61 | 47.80 | 57.97 | 59.72 | a | 71.70 | a | 67.87 | 58.33 | 44.84 | 36.20 | 27.70 | a | 47.06 | ||||||||||
1924 | 20.55 | 31.34 | 36.68 | 45.72 | a | 56.23 | a | 62.31 | a | 69.84 | 67.87 | 57.53 | 43.65 | 31.27 | 20.81 | 45.32 | ||||||||||
1925 | 16.35 | 30.71 | 37.97 | 47.44 | c | 58.77 | 63.60 | 73.67 | d | 66.59 | d | 57.26 | c | 49.55 | t | ----- | z | 25.97 | a | 47.83 | b | |||||
1926 | 21.39 | 30.22 | a | 37.73 | a | 47.29 | b | 55.39 | 63.79 | a | 69.58 | 68.13 | 58.90 | 47.10 | 35.71 | b | 28.10 | 46.94 | ||||||||
1927 | 27.87 | 35.14 | 38.48 | b | 46.17 | 55.61 | 62.10 | 71.58 | 67.97 | 60.03 | 45.77 | 38.13 | 25.84 | 47.89 | ||||||||||||
1928 | 25.97 | 31.66 | 40.90 | b | 45.00 | a | 57.58 | 63.48 | a | 70.68 | 67.21 | b | 61.76 | a | 47.65 | 38.17 | 23.60 | a | 47.80 | |||||||
1929 | 28.65 | 29.64 | 38.29 | 43.03 | 54.77 | a | 63.17 | 72.16 | 71.35 | 60.59 | c | 49.50 | e | 29.50 | b | 24.68 | c | 47.11 | ||||||||
1930 | 22.62 | e | 30.40 | c | 37.48 | b | 50.81 | c | 50.69 | b | 62.17 | f | 70.81 | e | 66.45 | 58.77 | 44.10 | 29.87 | 19.39 | 43.76 | a | |||||
1931 | 18.23 | e | 34.62 | d | 35.93 | b | 48.36 | b | 54.79 | c | 64.57 | 74.87 | 70.67 | a | 63.60 | 49.10 | 33.70 | 23.26 | 47.64 | |||||||
1932 | 21.84 | 32.72 | 37.21 | b | 45.90 | a | 54.81 | 61.97 | a | 72.59 | b | 69.13 | 59.80 | 46.77 | 33.97 | 23.07 | a | 46.65 | ||||||||
1933 | 18.65 | 21.25 | 36.90 | 43.23 | 48.82 | c | 64.17 | 74.00 | d | 68.84 | 64.30 | 50.93 | a | 32.70 | 27.58 | 45.95 | ||||||||||
1934 | 26.42 | 35.04 | 43.19 | 51.13 | 60.40 | a | 61.83 | a | 72.93 | a | 71.68 | 58.79 | a | 45.67 | d | 36.57 | b | 26.71 | 49.20 | |||||||
1935 | 27.00 | c | 31.64 | 36.52 | 47.53 | 53.23 | 63.54 | b | 70.27 | a | 70.83 | a | 61.53 | 46.48 | 31.60 | 26.68 | 47.24 | |||||||||
1936 | 26.13 | a | 34.00 | 39.23 | 48.40 | 54.86 | b | 67.29 | b | 73.62 | b | 72.18 | c | 60.14 | a | 47.19 | 30.87 | 27.67 | g | 50.35 | a | |||||
1937 | 15.55 | 27.96 | 38.07 | a | 45.63 | 56.87 | 64.41 | a | 70.96 | f | 67.14 | x | 58.38 | q | 47.85 | k | 34.05 | j | 31.65 | n | 41.42 | f | ||||
1938 | 27.90 | j | 33.50 | j | 38.00 | s | 46.37 | c | 51.29 | c | 59.50 | 65.58 | 68.06 | 56.90 | 41.16 | 20.07 | 24.16 | 48.12 | c | |||||||
1939 | 22.81 | 20.64 | 33.48 | 45.07 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.50 | h | ||||
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 | 67.29 | i | 74.37 | a | 72.48 | b | 62.71 | b | 50.00 | d | 32.69 | d | 33.69 | b | 54.32 | f |
1944 | 26.29 | c | 32.78 | b | 37.04 | h | 45.92 | d | 56.71 | g | 61.71 | f | 71.26 | d | 69.96 | f | 64.56 | c | 53.50 | o | 39.17 | g | 27.23 | e | 44.67 | f |
1945 | 28.70 | a | 35.75 | 38.48 | b | 45.92 | d | 58.90 | a | 64.29 | b | 74.63 | d | 73.21 | c | 63.19 | c | 52.48 | b | 33.74 | c | 25.00 | b | 49.52 | ||
1946 | 24.46 | c | 28.27 | b | 40.19 | d | 53.27 | d | 57.71 | c | 67.07 | c | 73.48 | b | 72.00 | 61.25 | f | 46.00 | a | 35.67 | 30.58 | 48.06 | a | |||
1947 | 24.10 | 34.19 | b | 42.17 | b | 47.97 | 59.83 | b | 62.12 | d | 71.14 | b | 70.61 | h | 63.81 | d | 52.17 | a | 35.37 | 27.97 | 47.35 | a | ||||
1948 | 23.94 | 31.10 | 34.72 | b | 49.18 | b | 57.26 | 64.31 | a | 70.23 | 67.71 | 60.93 | 48.61 | 31.43 | 26.87 | 47.19 | ||||||||||
1949 | 23.42 | 23.54 | 39.19 | 51.40 | 57.68 | 63.77 | 73.45 | 67.03 | 62.97 | a | 47.52 | 34.47 | 26.03 | 47.54 | ||||||||||||
1950 | 24.13 | 33.18 | 41.19 | 50.80 | 54.74 | 61.27 | 68.74 | 62.65 | 56.17 | 52.13 | 37.67 | 30.13 | 47.73 | |||||||||||||
1951 | 27.16 | 31.64 | 37.16 | 49.63 | 53.42 | 64.97 | 73.77 | 70.65 | 62.30 | 49.17 | a | 36.77 | 28.80 | a | 48.79 | |||||||||||
1952 | 28.16 | 30.62 | 38.23 | 48.80 | 58.32 | 64.63 | 71.29 | 71.84 | 62.87 | 49.48 | 34.60 | 29.29 | 49.01 | |||||||||||||
1953 | 30.58 | 31.21 | 38.55 | 46.97 | 52.68 | 65.00 | 73.60 | a | 69.00 | a | 60.38 | d | 47.89 | d | 35.46 | f | 25.45 | b | 49.21 | a | ||||||
1954 | 27.00 | 34.15 | a | 37.73 | a | 52.52 | c | 61.93 | b | 66.29 | b | 74.94 | 68.27 | a | 63.64 | b | 50.57 | c | 37.64 | b | 26.81 | 50.12 | ||||
1955 | 27.35 | 25.29 | 37.17 | a | 46.07 | c | 56.47 | a | 63.79 | a | 71.57 | a | 73.71 | 62.00 | a | 50.97 | 37.35 | d | 31.10 | 48.57 | ||||||
1956 | 33.32 | 28.66 | 36.77 | 49.57 | 58.52 | b | 68.07 | a | 71.94 | 66.86 | b | 62.50 | b | 50.03 | 28.43 | 24.06 | 48.23 | |||||||||
1957 | 31.73 | a | 39.25 | 44.00 | 47.10 | 53.45 | 66.17 | 70.68 | 71.23 | 61.23 | 52.29 | 35.52 | e | 29.43 | c | 50.17 | ||||||||||
1958 | 26.93 | a | 37.64 | 39.52 | 48.34 | a | 59.45 | 67.64 | b | 72.00 | c | 74.48 | 62.62 | a | 51.25 | c | 35.37 | 27.04 | f | 52.30 | a | |||||
1959 | 26.90 | 33.04 | b | 40.07 | b | 50.96 | c | 58.17 | a | 69.43 | b | 74.57 | a | 71.19 | d | 62.72 | a | 49.04 | c | 35.68 | e | 31.79 | c | 50.30 | ||
1960 | 26.15 | e | 32.36 | a | 41.66 | b | 47.74 | c | 57.00 | b | 67.46 | b | 72.62 | e | 72.11 | c | 64.65 | d | 50.10 | a | 36.62 | f | 26.53 | a | 50.76 | a |
1961 | 21.20 | f | 35.00 | a | 39.52 | b | 47.66 | a | 56.66 | b | 70.27 | 76.36 | i | 71.74 | 59.23 | 47.96 | d | 38.06 | m | 23.25 | c | 50.14 | c | |||
1962 | 25.87 | 33.89 | a | 35.47 | a | 51.41 | a | 54.71 | 63.27 | h | 72.42 | g | 68.47 | p | 62.81 | d | 50.19 | d | 39.52 | c | ----- | z | 44.23 | d | ||
1963 | 19.74 | h | 35.72 | c | 38.86 | c | 45.65 | d | 57.87 | a | 62.82 | b | 74.42 | 69.71 | 61.97 | a | 54.13 | a | 39.28 | a | 25.12 | e | 51.41 | a | ||
1964 | 24.21 | c | ----- | z | 35.81 | 46.97 | a | 53.60 | k | 63.97 | a | 73.13 | a | 68.63 | d | ----- | z | ----- | z | ----- | z | ----- | z | 52.12 | f | |
1965 | 32.71 | 33.88 | b | ----- | z | ----- | z | ----- | z | 59.57 | 71.35 | 69.23 | 58.30 | 48.71 | 41.37 | 31.23 | a | 49.59 | c | |||||||
1966 | 25.29 | 28.36 | 38.06 | 47.47 | 58.65 | 65.90 | 71.87 | 73.16 | 64.03 | 49.87 | 39.37 | 30.52 | 49.38 | |||||||||||||
1967 | 25.03 | 32.14 | 41.77 | 43.25 | f | 55.39 | 64.10 | 74.52 | 71.00 | 63.00 | a | 49.61 | c | 40.63 | 22.90 | 49.10 | a | |||||||||
1968 | 18.97 | 38.59 | 40.97 | 46.07 | 57.68 | 66.00 | d | 73.92 | e | 66.55 | 59.43 | 46.94 | 35.93 | 25.03 | a | 48.01 | ||||||||||
1969 | 32.93 | a | 33.71 | 37.26 | 48.17 | 59.00 | 65.50 | 71.23 | 73.57 | a | 63.40 | 47.35 | 36.87 | 31.00 | 50.00 | |||||||||||
1970 | 28.29 | 34.71 | 37.97 | a | 42.30 | 57.39 | 64.57 | 72.26 | 73.77 | 60.07 | 47.23 | 38.33 | c | 30.03 | 48.91 | |||||||||||
1971 | 25.40 | a | 32.96 | 38.42 | 47.17 | 53.83 | a | 66.67 | 74.58 | 73.35 | 62.15 | d | 46.48 | 35.43 | 27.58 | e | 48.67 | |||||||||
1972 | 27.00 | 32.04 | b | 45.06 | 48.63 | 56.78 | d | 68.07 | a | 74.00 | 70.45 | 60.73 | 50.33 | g | 37.52 | a | 27.68 | 49.81 | a | |||||||
1973 | 26.77 | 34.11 | 38.87 | 46.00 | 57.71 | c | 63.17 | 72.06 | 70.74 | 59.61 | b | 47.77 | 38.28 | a | 30.13 | 48.77 | ||||||||||
1974 | 29.37 | a | 29.00 | b | 45.13 | 46.39 | b | 58.80 | a | 69.00 | 72.71 | 69.82 | c | 62.37 | 51.50 | a | 34.91 | g | 28.71 | 51.16 | a | |||||
1975 | 26.23 | 32.29 | 39.16 | 42.60 | 52.06 | 63.97 | 71.10 | a | 66.29 | 61.03 | 45.84 | 32.67 | ----- | z | 48.48 | a | ||||||||||
1976 | 25.29 | 35.62 | 38.45 | 44.83 | 58.13 | 64.40 | 72.13 | 68.48 | 61.67 | 46.97 | 34.96 | c | 20.96 | d | 47.66 | |||||||||||
1977 | 25.55 | 29.86 | 34.74 | 47.57 | b | 54.63 | a | 67.71 | b | 72.03 | 71.10 | 63.63 | 50.13 | 37.04 | b | 33.84 | l | 50.36 | a | |||||||
1978 | 33.80 | f | 37.08 | c | 43.30 | h | 48.81 | c | 55.55 | 67.13 | 72.16 | 68.48 | 60.53 | 51.26 | d | 38.97 | 26.32 | 52.63 | b | |||||||
1979 | 26.73 | a | 28.43 | 37.74 | 46.00 | 55.96 | c | 61.97 | 70.94 | 67.26 | 61.87 | 49.26 | l | 32.57 | 25.71 | 46.83 | a | |||||||||
1980 | 32.29 | 33.31 | 36.26 | 43.83 | 48.71 | 59.60 | 70.16 | 68.10 | 57.40 | 42.40 | a | 33.37 | ----- | z | 47.77 | a | ||||||||||
1981 | ----- | z | 29.17 | e | 39.07 | c | 49.87 | 57.03 | a | 69.50 | 73.84 | 69.40 | a | 62.63 | 48.61 | 38.10 | 32.55 | b | 51.80 | a | ||||||
1982 | 27.93 | d | 33.12 | b | 41.23 | 47.27 | 57.13 | 64.23 | 70.29 | 70.00 | 62.04 | d | 43.57 | a | 37.65 | d | 30.04 | d | 48.71 | |||||||
1983 | 28.48 | 36.22 | a | 44.36 | c | 41.87 | ----- | z | 65.90 | 71.74 | 68.71 | 61.87 | 52.03 | 41.80 | 34.19 | 49.74 | a | |||||||||
1984 | 30.13 | ----- | z | 34.10 | a | 40.87 | 58.23 | 64.27 | 72.19 | 71.48 | 65.23 | 47.93 | a | 37.77 | 33.19 | 50.49 | a | |||||||||
1985 | 29.84 | 32.39 | 41.23 | 50.69 | a | 54.77 | 68.27 | 73.77 | 69.61 | 56.80 | 49.29 | 37.17 | 28.84 | 49.39 | ||||||||||||
1986 | 31.29 | 39.50 | 45.53 | a | 51.31 | a | 57.87 | 68.70 | 70.83 | a | 71.55 | 58.20 | 46.61 | 39.90 | a | 31.35 | 51.05 | |||||||||
1987 | 26.61 | 32.89 | 40.58 | 50.43 | 59.35 | 67.03 | 68.80 | p | 65.00 | o | 58.21 | k | 51.26 | d | 37.85 | c | 28.84 | 43.87 | c | |||||||
1988 | 27.55 | 34.07 | b | 37.17 | a | 46.74 | c | 52.94 | n | 67.10 | 73.65 | 70.71 | 60.79 | a | 51.67 | a | 37.63 | 27.07 | c | 48.56 | a | |||||
1989 | 26.50 | m | 31.37 | i | 42.47 | a | 52.52 | c | 57.58 | 64.63 | 71.81 | 67.87 | 60.14 | a | 47.00 | g | 34.67 | c | 24.67 | g | 56.46 | d | ||||
1990 | 28.12 | g | 28.88 | l | 41.50 | i | 50.65 | j | 57.08 | f | 65.92 | f | 72.46 | g | 68.30 | d | 63.67 | 48.13 | 34.87 | 21.41 | i | 53.74 | h | |||
1991 | 25.43 | a | 30.50 | 35.62 | b | 44.83 | ----- | z | ----- | z | 72.48 | d | 70.41 | b | ----- | z | 52.07 | b | 37.50 | 31.52 | 44.49 | c | ||||
1992 | 27.00 | 35.79 | 42.87 | 52.30 | 58.67 | a | 64.53 | 69.90 | a | 69.74 | 62.07 | 52.45 | 36.27 | 26.35 | 49.83 | |||||||||||
1993 | 33.39 | 36.79 | 42.58 | 49.73 | 57.30 | a | 63.67 | 71.45 | 68.40 | a | 58.57 | 47.97 | 34.00 | 26.39 | 49.19 | |||||||||||
1994 | 26.61 | 30.04 | b | 41.03 | 48.63 | 57.87 | 71.00 | a | 72.71 | 73.74 | 61.21 | b | 48.26 | 33.68 | b | 30.00 | b | 49.57 | ||||||||
1995 | 31.83 | a | 36.29 | ----- | z | 41.71 | w | 50.47 | n | 54.79 | k | ----- | z | ----- | z | 61.12 | e | 46.92 | e | 39.13 | 31.10 | b | 41.07 | f | ||
1996 | 29.71 | 34.14 | 38.19 | 48.30 | g | 56.18 | c | 65.38 | a | 73.10 | 66.87 | a | 59.40 | 45.42 | 36.83 | 33.16 | 48.94 | a | ||||||||
1997 | 31.55 | 32.32 | 39.26 | d | 44.35 | j | 58.93 | d | 64.62 | a | 70.61 | 70.75 | g | 62.45 | a | 44.97 | 37.40 | 27.42 | 46.95 | b | ||||||
1998 | 28.52 | 34.23 | b | 39.61 | 44.93 | ----- | z | 63.23 | 72.77 | 70.10 | 61.43 | 47.94 | 36.28 | a | 28.54 | c | 47.96 | a | ||||||||
1999 | 30.43 | a | 33.68 | 41.03 | a | 44.21 | a | 56.00 | b | 66.59 | a | 69.26 | 61.39 | 58.67 | c | 45.50 | c | 34.43 | b | 25.54 | c | 47.23 | ||||
2000 | 30.93 | a | 34.57 | a | 37.07 | d | 48.81 | n | 58.61 | 70.67 | 72.47 | a | 74.58 | 62.00 | 50.97 | 32.50 | 29.70 | a | 50.37 | a | ||||||
2001 | 26.37 | a | 32.89 | 42.52 | b | 47.81 | c | 58.97 | b | 66.73 | 72.30 | a | 70.33 | a | 62.47 | 52.19 | 39.71 | b | 25.90 | a | 49.85 | |||||
2002 | 27.45 | 28.31 | b | 35.84 | 52.47 | 58.03 | 69.03 | 77.61 | 71.65 | 62.17 | 46.97 | 34.32 | b | 30.33 | a | 49.51 | ||||||||||
2003 | 31.77 | 33.38 | b | 41.13 | a | 45.17 | a | 58.62 | b | 69.07 | b | 76.97 | b | 73.21 | b | 61.83 | a | 52.64 | c | 38.37 | c | 30.45 | b | 51.05 | ||
2004 | 26.75 | g | 30.23 | c | 44.52 | h | 50.04 | b | 59.03 | a | 68.17 | a | 71.81 | 68.10 | a | 60.03 | a | 49.73 | a | 38.45 | a | 29.24 | j | 55.07 | c | |
2005 | 34.79 | b | 35.20 | c | 39.57 | a | 42.81 | c | 54.50 | w | 64.08 | q | 72.32 | l | 67.08 | r | 60.62 | n | 49.61 | c | 37.11 | l | ----- | z | 40.40 | g |
2006 | 26.58 | 28.79 | 36.85 | d | 49.07 | 61.13 | 69.23 | 76.45 | 71.55 | 59.53 | 49.48 | 38.73 | 29.13 | 49.71 | ||||||||||||
2007 | 25.74 | 35.93 | 43.10 | 50.57 | 58.93 | a | 68.50 | 77.23 | 73.48 | 65.10 | 47.84 | 39.20 | 30.13 | 51.31 | ||||||||||||
2008 | 28.29 | 34.76 | 40.19 | 46.03 | 53.84 | 65.40 | 75.06 | 71.77 | 62.72 | a | 47.53 | a | 41.30 | 32.91 | i | 51.54 | a | |||||||||
2009 | 27.57 | x | ----- | z | 37.67 | v | 48.13 | 62.66 | b | 64.93 | 73.81 | 68.00 | e | 63.10 | a | 43.00 | b | 36.58 | d | 29.00 | h | 57.53 | d | |||
2010 | 29.10 | 35.75 | 40.35 | 47.37 | 52.84 | 67.10 | 75.84 | 70.10 | 62.17 | 54.95 | i | 37.20 | 35.90 | 50.34 | a | |||||||||||
2011 | 27.52 | 30.18 | 42.03 | 47.17 | 54.10 | 66.10 | 73.39 | 74.32 | 64.33 | 50.52 | 38.27 | 29.13 | 49.75 | |||||||||||||
2012 | 29.50 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 26.80 | 32.38 | 39.13 | 47.46 | 56.60 | 65.32 | 72.49 | 69.95 | 61.31 | 48.52 | 35.88 | 27.98 | 48.62 | |||||||||||||
S.D. | 3.83 | 3.53 | 2.69 | 2.78 | 2.72 | 2.65 | 2.00 | 2.56 | 2.11 | 2.70 | 3.37 | 3.28 | 1.39 | |||||||||||||
SKEW | -0.59 | -0.85 | 0.36 | -0.08 | -0.66 | -0.05 | -0.04 | -0.50 | -0.44 | -0.34 | -1.48 | -0.20 | -0.16 | |||||||||||||
MAX | 34.79 | 39.50 | 45.53 | 53.27 | 62.66 | 71.00 | 77.61 | 74.58 | 65.23 | 54.13 | 41.80 | 35.90 | 51.31 | |||||||||||||
MIN | 15.55 | 20.64 | 33.48 | 40.87 | 48.71 | 59.50 | 65.58 | 61.39 | 56.17 | 41.16 | 20.07 | 19.39 | 45.32 | |||||||||||||
YRS | 77 | 80 | 78 | 79 | 75 | 78 | 79 | 78 | 80 | 79 | 78 | 73 | 43 |