YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.76 | b | 61.52 | 61.43 | 47.03 | 40.00 | d | 27.23 | a | 50.66 | f | |||
1916 | 21.87 | 27.90 | 37.65 | 39.38 | a | 53.93 | a | 62.60 | 67.97 | a | 67.55 | 61.15 | c | 54.48 | h | 35.07 | b | 19.00 | 44.91 | a | ||||||
1917 | 22.53 | a | 19.79 | 29.47 | a | 41.33 | 45.77 | 59.83 | a | 70.48 | 65.58 | 58.17 | 36.61 | 34.61 | b | 16.16 | 41.69 | |||||||||
1918 | 11.48 | 20.71 | 34.94 | 38.52 | a | 56.90 | 66.23 | 67.61 | 69.93 | a | 53.97 | a | 52.13 | 38.17 | 28.55 | 44.93 | ||||||||||
1919 | 23.06 | 29.50 | 37.52 | 46.33 | 55.10 | 60.63 | k | 69.97 | 68.68 | 62.58 | d | 50.35 | e | 31.33 | 22.37 | a | 45.16 | a | ||||||||
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 | 27.50 | a | 29.81 | a | 43.55 | 43.68 | b | 53.85 | e | 63.64 | e | 72.61 | 71.52 | 59.79 | a | 50.48 | b | 34.04 | d | 26.68 | c | 48.10 | ||||
1936 | 22.00 | a | 15.93 | a | 35.87 | a | 42.40 | 58.54 | e | 65.41 | a | 72.61 | 72.71 | 65.03 | 45.87 | 31.77 | 31.63 | a | 46.65 | |||||||
1937 | 18.52 | d | 26.50 | b | 32.61 | 44.93 | a | 57.00 | a | 66.87 | 71.94 | 74.48 | 61.17 | g | 46.97 | 33.47 | 26.19 | 45.41 | a | |||||||
1938 | 26.87 | 30.64 | 42.46 | e | 44.39 | b | 56.94 | 65.23 | 69.16 | 71.71 | 61.10 | 52.04 | c | 33.28 | a | 26.71 | 48.38 | |||||||||
1939 | 30.48 | 21.64 | c | 36.39 | 44.46 | d | 55.22 | h | 67.59 | m | 71.53 | l | 68.84 | l | 61.87 | 49.32 | 34.30 | 27.86 | b | 38.29 | d | |||||
1940 | 11.44 | m | 28.10 | s | 36.86 | b | 46.39 | b | 54.45 | b | 63.47 | 69.93 | a | ----- | z | 61.07 | 50.90 | 33.47 | 30.40 | a | 49.66 | c | ||||
1941 | ----- | z | 28.37 | i | 33.74 | 49.11 | c | 59.68 | c | 63.50 | 69.53 | a | 70.19 | d | 65.68 | e | 53.55 | 34.55 | a | 31.79 | b | 53.13 | b | |||
1942 | 9.00 | s | ----- | z | 36.07 | a | 50.21 | a | 54.23 | 66.47 | 70.17 | b | 68.90 | 59.14 | b | 49.54 | c | 36.72 | a | 27.68 | 51.91 | b | ||||
1943 | 23.16 | 30.16 | c | 30.61 | 48.50 | b | 53.94 | 68.77 | 71.13 | h | 73.15 | e | 60.03 | 46.03 | 32.21 | a | 24.74 | 44.66 | a | |||||||
1944 | 28.58 | 31.97 | 32.90 | 43.50 | 57.06 | 69.00 | 69.19 | 70.32 | 59.89 | c | 50.42 | 41.70 | 26.45 | 48.42 | ||||||||||||
1945 | 27.68 | 29.75 | 39.71 | 44.60 | 52.86 | b | 62.10 | 68.23 | a | 68.90 | 60.70 | 48.48 | 35.82 | b | 21.52 | 46.70 | ||||||||||
1946 | 26.97 | 32.73 | b | 42.90 | a | 49.70 | 51.14 | b | 65.77 | 70.87 | 65.09 | t | 60.83 | 53.27 | i | 37.90 | 31.90 | b | 47.07 | b | ||||||
1947 | 18.62 | r | ----- | z | 34.94 | n | 45.70 | 53.48 | 65.00 | 67.45 | b | 71.74 | 62.85 | c | 58.56 | d | 34.57 | 29.06 | 54.27 | c | ||||||
1948 | 22.63 | a | 26.14 | 32.39 | 52.22 | c | 57.10 | 66.48 | a | 71.10 | 67.77 | a | 59.59 | c | 45.42 | 35.27 | 29.90 | 47.17 | ||||||||
1949 | 18.84 | 28.08 | c | 37.10 | 45.93 | 58.57 | c | 67.23 | ----- | z | 62.09 | t | 56.32 | b | 48.28 | b | 33.72 | a | 24.58 | 41.87 | b | |||||
1950 | 20.84 | 27.14 | 33.06 | 44.68 | b | 56.68 | 66.83 | 67.23 | 64.96 | c | 59.33 | 52.10 | 30.27 | 22.14 | c | 45.44 | ||||||||||
1951 | 27.55 | i | 41.00 | t | 31.55 | 43.53 | 56.03 | 64.20 | 71.39 | 70.84 | 58.73 | 48.68 | 31.30 | 25.19 | 50.14 | b | ||||||||||
1952 | 28.71 | 31.79 | 33.26 | 43.20 | 55.23 | 72.20 | 69.65 | 72.19 | 56.90 | 39.94 | 33.60 | 24.71 | 46.78 | |||||||||||||
1953 | 28.20 | a | 29.41 | a | 40.29 | 42.93 | 55.71 | 72.47 | 69.84 | 66.61 | 59.83 | 49.28 | b | 36.50 | 27.94 | 48.25 | ||||||||||
1954 | 21.61 | 33.86 | ----- | z | 54.81 | i | 52.39 | 64.00 | i | 74.29 | n | 72.70 | a | 64.17 | 51.28 | b | 34.13 | 24.52 | 44.33 | d | ||||||
1955 | 26.16 | 24.43 | e | 31.66 | b | 48.43 | b | 56.94 | 61.13 | 71.48 | 68.32 | 61.67 | 45.89 | d | 29.17 | 22.55 | b | 45.65 | ||||||||
1956 | 21.62 | o | 24.48 | 32.58 | 40.87 | 58.59 | b | 68.35 | d | 70.55 | 69.93 | b | 59.37 | ----- | z | ----- | z | 28.26 | d | 50.33 | c | |||||
1957 | 20.03 | b | 33.89 | 34.25 | k | 44.87 | 52.81 | 61.97 | a | 70.74 | h | ----- | z | 52.50 | f | 45.80 | f | 35.11 | c | 27.40 | f | 41.45 | f | |||
1958 | 25.34 | b | 25.42 | b | 28.27 | p | ----- | z | 55.07 | b | 63.50 | ----- | z | 65.35 | e | 61.36 | b | 48.57 | j | 33.45 | a | 24.81 | j | 47.07 | e | |
1959 | 17.53 | n | 23.33 | g | 30.69 | e | 42.69 | a | 57.32 | 64.00 | 64.97 | 68.29 | c | ----- | z | ----- | z | 26.36 | e | 31.81 | 48.27 | d | ||||
1960 | 25.29 | 24.00 | 28.45 | 49.03 | 51.52 | 65.80 | 66.65 | 66.55 | 58.93 | 47.94 | 34.47 | 26.71 | 45.44 | |||||||||||||
1961 | 20.71 | 28.68 | 36.87 | 43.63 | 54.65 | 63.53 | 67.42 | 67.06 | 57.93 | 48.48 | 34.47 | 24.52 | 45.66 | |||||||||||||
1962 | 18.39 | 29.79 | 32.52 | 45.13 | 62.45 | 64.70 | 71.26 | 67.84 | 61.07 | 51.61 | 35.40 | 26.35 | 47.21 | |||||||||||||
1963 | 13.13 | 25.07 | 38.10 | 48.93 | 58.90 | 67.03 | 71.84 | 70.00 | 63.20 | 54.00 | 35.07 | 18.87 | 47.01 | |||||||||||||
1964 | 23.87 | 26.17 | 30.32 | 48.50 | 57.97 | 65.80 | 72.97 | 67.61 | 61.10 | 45.10 | 38.66 | a | 22.81 | 46.74 | ||||||||||||
1965 | 25.81 | 24.46 | 26.32 | 49.13 | 57.90 | 65.13 | 71.32 | 66.84 | 60.03 | 46.48 | 39.27 | 33.55 | 47.19 | |||||||||||||
1966 | 20.23 | 24.14 | 36.52 | 42.43 | 51.74 | 65.70 | 73.77 | 65.55 | 57.10 | a | 44.55 | 36.33 | 20.87 | 44.91 | ||||||||||||
1967 | 23.48 | 25.07 | 37.52 | 52.50 | 51.45 | 65.43 | 66.19 | 64.26 | 57.07 | 48.58 | 33.57 | 27.39 | 46.04 | |||||||||||||
1968 | 25.29 | 25.10 | 37.29 | 43.73 | 51.68 | 65.30 | 69.19 | 69.45 | 57.10 | 47.74 | 34.33 | 22.29 | 45.71 | |||||||||||||
1969 | 26.58 | 30.64 | 29.32 | 46.53 | 57.71 | 63.43 | 73.39 | 69.52 | 63.03 | 47.39 | 32.03 | 27.32 | 47.24 | |||||||||||||
1970 | 19.23 | 27.18 | 31.90 | 45.00 | 58.65 | 64.20 | 70.58 | 71.55 | 61.66 | a | 46.55 | 32.73 | 26.77 | 46.33 | ||||||||||||
1971 | 20.35 | 22.14 | 33.84 | 45.90 | 53.19 | 69.00 | 69.39 | 67.00 | 62.47 | 49.94 | 37.53 | 31.23 | 46.83 | |||||||||||||
1972 | 20.97 | 25.00 | 37.97 | 47.10 | 55.26 | 66.13 | 69.10 | 68.48 | 64.33 | 47.77 | 33.47 | 21.94 | 46.46 | |||||||||||||
1973 | 22.16 | 29.25 | 42.03 | 43.63 | 52.32 | 65.37 | 69.55 | 69.87 | 60.77 | 52.61 | 38.03 | 25.68 | 47.61 | |||||||||||||
1974 | 19.65 | 28.61 | 37.03 | 47.23 | 57.43 | a | 60.30 | 71.26 | 65.29 | 52.40 | 50.58 | 36.62 | a | 26.61 | 46.08 | |||||||||||
1975 | 26.39 | 20.70 | a | 32.94 | 45.10 | a | 55.23 | a | 63.15 | d | 68.06 | 70.06 | 56.37 | 45.23 | e | 36.57 | 27.68 | 45.62 | ||||||||
1976 | 22.16 | 32.08 | d | 35.37 | d | 48.10 | 50.26 | 62.93 | b | 67.42 | 67.26 | 59.10 | 42.81 | 28.87 | 22.52 | 44.91 | ||||||||||
1977 | 15.65 | 31.67 | d | 37.30 | a | 49.43 | 59.00 | m | 66.81 | n | 73.27 | e | 69.77 | 64.52 | a | 47.96 | d | 36.00 | 24.55 | 45.01 | b | |||||
1978 | 14.10 | 18.46 | 33.84 | 48.53 | 54.90 | 67.73 | 72.84 | 70.19 | 65.53 | 46.16 | 37.03 | 22.87 | a | 46.02 | ||||||||||||
1979 | 12.00 | a | 18.57 | 36.78 | d | 42.19 | d | 52.84 | f | 63.81 | c | ----- | z | ----- | z | ----- | z | 44.48 | j | 34.03 | 26.06 | 33.35 | e | |||
1980 | 25.97 | a | 23.72 | 32.42 | 41.60 | 53.70 | a | 69.26 | c | 74.30 | a | 73.26 | 64.03 | a | 45.90 | 33.44 | c | 28.26 | 47.16 | |||||||
1981 | 23.32 | 28.78 | a | 38.00 | 49.23 | h | 54.10 | b | 69.79 | a | 73.97 | 67.93 | b | 62.22 | c | 50.97 | 39.23 | 28.55 | 48.81 | a | ||||||
1982 | 19.13 | a | 20.29 | 36.50 | a | 43.73 | 57.29 | 62.27 | 71.90 | 72.34 | b | 62.70 | 46.19 | 33.41 | a | 29.50 | a | 46.27 | ||||||||
1983 | 26.60 | a | 32.04 | a | 37.24 | b | 41.57 | b | 51.77 | a | 61.71 | b | 72.50 | a | 74.73 | a | 64.00 | 48.06 | 34.57 | b | 11.94 | 46.39 | ||||
1984 | 15.97 | a | 26.72 | 26.94 | 40.03 | 47.90 | 63.53 | 66.97 | 66.39 | 57.24 | a | 44.63 | a | 34.20 | 29.17 | a | 43.31 | |||||||||
1985 | 16.87 | 23.96 | 40.48 | 48.48 | a | 57.60 | a | 66.23 | 71.06 | 69.58 | 62.63 | 48.87 | 33.63 | 22.00 | 46.78 | |||||||||||
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.03 | 33.30 | 29.23 | 37.85 | i | |||
1987 | 24.94 | 35.14 | 36.97 | 45.53 | 60.19 | 66.70 | 70.87 | 70.87 | 61.60 | 46.55 | b | 37.00 | d | 27.74 | 48.68 | |||||||||||
1988 | 21.45 | 26.04 | b | 34.74 | 43.53 | 58.19 | 66.83 | 70.77 | 71.61 | 60.38 | a | 47.71 | 36.40 | 28.90 | 47.21 | |||||||||||
1989 | 27.32 | 21.07 | 34.06 | 48.17 | 57.90 | 63.34 | a | 68.83 | a | 69.23 | i | 56.60 | 49.29 | 33.10 | 17.48 | 43.38 | a | |||||||||
1990 | 29.65 | 30.86 | 39.94 | 45.07 | a | 55.87 | 71.07 | 70.43 | a | 69.61 | 64.76 | a | 48.48 | 39.60 | 19.48 | 48.73 | ||||||||||
1991 | 20.63 | a | 31.50 | 38.77 | 49.43 | 61.55 | 69.00 | a | 72.29 | 69.10 | 61.70 | 49.58 | 31.83 | a | 32.97 | 49.03 | ||||||||||
1992 | 30.97 | 35.14 | 39.90 | 45.93 | 54.26 | 62.76 | a | 70.52 | b | 65.61 | c | 61.73 | 48.54 | c | 35.90 | 27.48 | 48.23 | |||||||||
1993 | 23.77 | 27.21 | 35.42 | 44.17 | 55.64 | c | 66.73 | 73.58 | 72.70 | d | 57.40 | 45.20 | a | 29.93 | 26.52 | 46.52 | ||||||||||
1994 | 21.90 | 21.74 | a | 36.10 | a | 43.70 | 54.71 | 69.66 | a | 68.65 | 69.20 | a | 59.52 | a | 50.26 | 37.43 | 29.97 | 46.90 | ||||||||
1995 | 25.45 | b | 32.00 | 37.50 | a | 42.77 | 52.50 | a | 62.47 | 69.41 | b | 71.58 | 60.17 | 46.73 | a | 32.36 | b | 24.97 | a | 46.49 | ||||||
1996 | 20.23 | a | 23.72 | 28.39 | 42.17 | 61.87 | a | 66.29 | b | 70.43 | a | 69.00 | p | 60.08 | d | 49.42 | 34.43 | 24.27 | a | 43.75 | a | |||||
1997 | 22.30 | a | 30.89 | a | 36.03 | a | 41.55 | a | 52.61 | 62.93 | 71.03 | 67.79 | b | 63.69 | a | 50.84 | 34.04 | b | 27.10 | 46.73 | ||||||
1998 | 26.06 | 31.36 | c | 30.67 | d | 41.46 | f | 62.54 | c | 68.46 | b | 72.41 | b | 69.00 | a | 65.17 | a | 48.96 | d | 39.03 | 26.10 | a | 49.07 | a | ||
1999 | 22.83 | a | 31.93 | a | 32.62 | b | 42.26 | c | 53.17 | a | 63.85 | c | 70.90 | 68.45 | 58.75 | f | 43.59 | b | 34.44 | c | 26.17 | a | 44.56 | a | ||
2000 | 20.93 | b | 27.52 | b | 35.43 | c | 41.52 | a | 56.17 | b | 62.97 | a | 69.72 | b | 72.94 | 58.07 | a | 49.66 | b | 30.57 | 17.59 | b | 45.26 | |||
2001 | 22.20 | a | 25.71 | 31.93 | b | 47.30 | 53.81 | d | 64.40 | 74.32 | 70.33 | a | 57.68 | b | 41.73 | e | 38.38 | a | 22.67 | a | 45.87 | |||||
2002 | 20.58 | 25.12 | d | 24.96 | c | 45.92 | d | 51.10 | a | 67.52 | i | 70.26 | d | 69.20 | a | 60.50 | b | 43.88 | g | 33.20 | 24.80 | a | 42.57 | b | ||
2003 | 20.28 | b | 21.36 | 30.83 | b | 41.59 | c | 52.32 | 60.71 | b | 71.66 | b | 70.76 | b | 56.40 | 47.06 | 32.90 | 24.90 | 44.23 | |||||||
2004 | 21.07 | b | 23.15 | b | 39.58 | 43.93 | b | 55.27 | a | 63.17 | 67.68 | 64.63 | a | 60.57 | 48.87 | a | 39.97 | 24.16 | 46.00 | |||||||
2005 | 22.14 | b | 31.14 | 33.90 | 42.14 | a | 54.55 | 65.53 | 66.97 | 68.74 | 62.30 | 49.24 | b | 32.55 | a | 20.16 | 45.78 | |||||||||
2006 | 26.87 | 19.67 | a | 33.00 | a | 44.59 | c | 56.43 | a | 64.23 | 71.43 | c | 71.90 | a | ----- | z | ----- | z | 32.44 | u | 25.68 | f | 48.52 | d | ||
2007 | 21.87 | a | 23.82 | 43.87 | a | 41.43 | b | 59.83 | a | 65.93 | c | 70.23 | a | 73.28 | b | 65.26 | c | 50.30 | d | 31.87 | 23.35 | 47.59 | ||||
2008 | 22.32 | 25.10 | 33.43 | c | 40.60 | 54.88 | e | 65.21 | b | 69.07 | c | 68.77 | a | 58.15 | d | 45.83 | g | 35.00 | e | 23.55 | i | 47.25 | b | |||
2009 | 21.44 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.60 | 26.83 | 35.04 | 44.97 | 55.38 | 65.30 | 70.26 | 69.26 | 60.57 | 48.24 | 34.65 | 25.59 | 46.49 | |||||||||||||
S.D. | 4.18 | 4.42 | 4.05 | 3.05 | 3.17 | 2.69 | 2.12 | 2.65 | 2.81 | 3.28 | 2.81 | 4.07 | 1.37 | |||||||||||||
SKEW | -0.44 | -0.21 | -0.07 | 0.32 | -0.11 | 0.47 | -0.17 | -0.27 | -0.31 | -0.44 | -0.01 | -0.65 | -0.80 | |||||||||||||
MAX | 30.97 | 35.14 | 43.87 | 52.50 | 62.54 | 72.47 | 74.32 | 74.73 | 65.68 | 58.56 | 41.70 | 33.55 | 49.03 | |||||||||||||
MIN | 11.48 | 15.93 | 24.96 | 38.52 | 45.77 | 59.83 | 64.97 | 61.52 | 52.40 | 36.61 | 26.36 | 11.94 | 41.69 | |||||||||||||
YRS | 70 | 71 | 73 | 73 | 74 | 72 | 71 | 70 | 72 | 69 | 77 | 75 | 50 |