YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | 36.23 | a | 40.79 | 42.48 | 49.47 | 53.06 | 62.10 | 71.90 | a | 72.87 | 62.90 | 52.58 | 41.37 | 38.35 | 52.01 | |||||||||||
1916 | 41.94 | 45.00 | 48.13 | 50.90 | 53.65 | 64.07 | 75.23 | 73.10 | 66.93 | 50.90 | 37.73 | 31.16 | 53.23 | |||||||||||||
1917 | 36.71 | 38.71 | 38.50 | c | 48.30 | ----- | z | 66.03 | 75.45 | 71.19 | 67.33 | 53.58 | 42.69 | a | 35.00 | b | 52.14 | a | ||||||||
1918 | 32.97 | a | 39.19 | a | 47.35 | 49.30 | 54.19 | 69.13 | 73.78 | d | 68.90 | 65.57 | 55.81 | 41.87 | 35.84 | 52.82 | ||||||||||
1919 | 33.81 | 34.79 | 40.44 | f | 48.80 | 57.26 | 65.33 | 73.67 | a | 73.23 | 65.00 | g | 50.23 | 42.07 | 38.81 | 51.80 | b | |||||||||
1920 | 37.07 | d | 43.17 | 41.06 | 46.43 | 58.81 | 66.80 | 72.06 | 71.23 | a | 62.70 | 49.81 | 41.17 | 30.47 | a | 51.73 | ||||||||||
1921 | 34.65 | 37.64 | 46.42 | 45.20 | 50.97 | 61.73 | o | 73.19 | 72.16 | 65.43 | 56.29 | g | ----- | z | 41.78 | h | 53.21 | d | ||||||||
1922 | 32.81 | 38.04 | 39.39 | 44.40 | 60.13 | 65.73 | 73.06 | 72.90 | 69.60 | 50.03 | a | 32.55 | s | 39.00 | 53.19 | a | ||||||||||
1923 | 39.55 | ----- | z | ----- | z | ----- | z | ----- | z | 64.63 | 72.48 | 73.13 | 62.76 | a | 49.32 | 44.92 | q | 38.19 | 57.15 | e | ||||||
1924 | 33.16 | 42.24 | 37.36 | q | 48.69 | a | 58.20 | a | 65.07 | 75.42 | 74.23 | 69.20 | ----- | z | 43.20 | 38.08 | e | 54.75 | b | |||||||
1925 | 35.90 | 42.18 | 50.26 | 55.20 | 60.90 | 65.81 | i | 75.90 | a | 75.00 | m | 63.07 | 54.67 | a | 38.26 | g | 37.74 | h | 54.76 | d | ||||||
1926 | 31.29 | 41.00 | 49.61 | 56.30 | 61.26 | 69.73 | 73.48 | 74.65 | 68.70 | 56.10 | 38.12 | m | 33.70 | h | 58.21 | b | ||||||||||
1927 | 38.60 | p | 46.07 | 43.10 | 49.80 | ----- | z | 66.00 | 77.70 | a | 75.10 | 69.00 | 56.03 | 46.13 | 37.16 | 56.61 | b | |||||||||
1928 | 33.39 | 36.21 | e | 40.84 | l | 49.96 | e | 57.06 | 65.10 | 74.04 | g | 73.26 | 65.73 | 50.55 | 43.69 | a | 35.14 | c | 51.01 | b | ||||||
1929 | 32.93 | b | 34.67 | a | 36.76 | f | 40.47 | o | 56.27 | e | 65.00 | g | 75.69 | b | 73.17 | a | 65.97 | 55.10 | a | 36.00 | a | 34.77 | 51.62 | c | ||
1930 | 36.58 | e | 39.14 | 41.06 | m | 51.04 | c | 50.13 | h | 64.00 | b | 72.72 | b | 68.56 | f | 60.87 | 49.35 | 45.16 | e | 35.48 | d | 50.48 | c | |||
1931 | 35.50 | a | ----- | z | 43.03 | b | 53.53 | k | 61.29 | g | 67.62 | f | 77.10 | 73.68 | 67.27 | 53.07 | a | 41.00 | c | 34.42 | 53.13 | d | ||||
1932 | 28.61 | 41.00 | 40.80 | u | 45.93 | 53.23 | 62.72 | a | 72.39 | 73.40 | a | 65.93 | b | 51.10 | 40.24 | a | 31.32 | 51.44 | a | |||||||
1933 | 33.39 | c | 33.79 | 41.74 | 46.67 | 52.32 | 67.37 | 77.03 | 75.13 | 68.70 | 58.10 | b | 43.69 | a | 34.81 | 52.73 | ||||||||||
1934 | 33.83 | b | 41.96 | 48.52 | 51.77 | ----- | z | 60.83 | 74.57 | a | 72.87 | 63.30 | 52.45 | 42.00 | 38.36 | c | 52.77 | a | ||||||||
1935 | 38.73 | a | 42.43 | 39.27 | a | 47.23 | 49.91 | i | 64.68 | e | ----- | z | 69.87 | 63.50 | b | ----- | z | 35.26 | c | 36.52 | 48.61 | c | ||||
1936 | 31.73 | a | 37.45 | 42.32 | 47.83 | 55.29 | 65.26 | c | 73.58 | e | 72.93 | a | 64.20 | 55.87 | a | 46.87 | 38.52 | 52.65 | ||||||||
1937 | 29.55 | 38.74 | a | 43.60 | a | 47.32 | b | 57.10 | 65.33 | 76.06 | 75.55 | 70.80 | 54.97 | 42.00 | 40.68 | 53.47 | ||||||||||
1938 | 38.26 | 41.89 | 43.13 | 48.87 | 56.32 | 65.33 | 72.70 | a | 73.87 | 69.79 | a | 52.33 | a | 37.10 | 39.07 | a | 53.22 | |||||||||
1939 | 37.67 | a | 33.52 | c | 44.84 | 51.82 | b | 58.55 | 66.37 | 75.65 | 75.10 | 69.03 | a | 52.00 | a | 50.53 | 40.31 | b | 54.62 | |||||||
1940 | 38.31 | b | 41.10 | 44.67 | a | 51.79 | a | 62.13 | a | 70.03 | 74.37 | a | 75.00 | 69.55 | a | 56.39 | 42.59 | a | 44.90 | 55.90 | ||||||
1941 | 42.55 | 47.43 | 44.94 | 48.50 | 58.35 | 62.52 | a | 74.17 | a | 70.35 | 61.90 | a | 52.77 | 44.65 | g | 39.45 | 54.81 | a | ||||||||
1942 | 38.38 | b | 36.07 | 39.81 | 48.00 | d | 52.97 | b | 63.63 | 76.61 | 73.40 | a | 66.77 | 55.29 | 44.90 | 38.48 | 52.86 | |||||||||
1943 | 38.29 | 43.14 | 45.87 | 51.00 | 59.96 | f | 65.54 | b | 75.97 | a | 75.28 | b | 68.69 | d | 57.35 | 42.68 | h | 42.54 | c | 56.37 | b | |||||
1944 | 35.84 | 38.59 | 39.48 | 47.00 | 56.97 | 60.50 | b | 72.26 | 74.43 | a | 69.07 | 57.16 | 44.37 | 38.48 | 52.85 | |||||||||||
1945 | 37.32 | 39.68 | 40.83 | a | 47.23 | 56.26 | 60.50 | 76.45 | b | 76.06 | 67.83 | 57.97 | 39.87 | 35.52 | 52.96 | |||||||||||
1946 | 36.06 | 34.04 | 45.24 | b | 54.28 | a | 56.94 | 65.90 | 74.75 | g | 75.52 | 69.47 | 49.89 | c | 40.43 | 42.16 | f | 52.78 | b | |||||||
1947 | 32.40 | f | 40.18 | 43.03 | 47.07 | 59.42 | 64.70 | 76.71 | 73.81 | 68.90 | 54.16 | 39.67 | 36.91 | h | 56.76 | b | ||||||||||
1948 | 34.27 | a | 38.76 | 42.86 | c | 51.10 | 56.07 | a | 64.70 | 76.03 | a | 75.71 | 70.47 | 60.77 | 38.97 | 38.13 | 53.99 | |||||||||
1949 | 34.23 | 36.93 | a | 42.23 | 53.50 | 57.84 | 69.10 | 76.58 | 70.81 | 72.07 | 54.10 | 48.43 | 37.10 | a | 54.41 | |||||||||||
1950 | 34.84 | 43.46 | 44.47 | a | 51.60 | 54.71 | 63.67 | 75.63 | a | 71.10 | 63.83 | 56.71 | 45.13 | 38.54 | c | 53.64 | ||||||||||
1951 | 34.87 | 40.82 | 42.19 | 49.30 | 56.81 | 60.27 | 75.61 | 71.87 | 63.53 | 53.61 | 43.03 | 38.16 | 52.51 | |||||||||||||
1952 | 36.26 | 37.62 | 39.55 | 50.20 | 59.03 | a | 63.47 | 72.84 | 74.90 | a | 69.13 | 55.55 | 42.57 | 37.97 | 53.26 | |||||||||||
1953 | 38.26 | 35.68 | 44.77 | 47.93 | 50.87 | 63.67 | 76.16 | 72.87 | 63.33 | 53.03 | 44.47 | 32.26 | 51.94 | |||||||||||||
1954 | 36.55 | 43.93 | 43.27 | i | 50.17 | 57.35 | 64.37 | 76.32 | 72.61 | 67.32 | e | 54.52 | 43.60 | 38.03 | 54.98 | a | ||||||||||
1955 | 35.90 | 34.29 | 41.48 | 44.47 | 56.06 | 62.47 | 70.65 | 73.39 | 63.30 | 57.10 | 42.27 | 38.55 | 51.66 | |||||||||||||
1956 | 39.32 | 34.62 | 40.23 | 47.53 | 57.23 | 69.47 | 73.23 | 68.84 | 65.63 | 49.77 | 38.77 | 35.71 | 51.70 | |||||||||||||
1957 | 42.74 | 47.11 | 45.58 | 48.43 | 55.77 | 68.80 | 78.90 | 75.84 | 65.67 | 56.35 | 42.30 | 37.04 | c | 55.38 | ||||||||||||
1958 | 35.74 | 42.96 | 42.08 | g | 47.60 | 61.04 | c | 61.92 | q | ----- | z | 74.79 | l | 71.03 | a | 61.04 | e | 42.96 | d | 37.04 | h | 51.77 | e | |||
1959 | 36.65 | 37.46 | 41.26 | 52.61 | b | 52.76 | f | 67.94 | n | 75.83 | a | ----- | z | 63.50 | 52.31 | b | 40.50 | d | 35.93 | c | 48.45 | c | ||||
1960 | 30.77 | 30.11 | b | ----- | z | ----- | z | 59.20 | a | 68.36 | e | ----- | z | 73.32 | f | ----- | z | ----- | z | ----- | z | ----- | z | 47.11 | h | |
1961 | 40.26 | l | 37.61 | 42.42 | 48.17 | 52.32 | 67.47 | 73.87 | 72.40 | a | 61.87 | 48.23 | 37.80 | 35.03 | 52.47 | a | ||||||||||
1962 | 35.00 | 38.75 | 36.61 | 50.17 | 51.48 | 59.83 | 70.39 | 71.13 | 65.60 | 50.55 | 41.80 | 38.06 | 50.78 | |||||||||||||
1963 | 28.77 | 40.07 | 39.55 | 45.00 | 58.35 | 59.87 | 74.13 | 71.52 | 66.73 | 55.74 | 43.23 | 33.23 | a | 51.35 | ||||||||||||
1964 | 27.83 | b | 29.83 | 38.48 | 44.73 | 51.06 | 59.23 | 71.48 | ----- | z | ----- | z | ----- | z | 37.77 | 37.06 | 44.17 | c | ||||||||
1965 | 38.81 | 38.21 | 40.35 | 47.63 | 50.77 | a | 57.10 | 72.48 | 69.42 | 59.87 | 51.16 | 46.10 | 41.48 | 51.12 | ||||||||||||
1966 | 34.35 | 35.32 | 43.52 | 48.00 | 58.03 | 63.27 | 72.90 | 72.06 | 66.87 | 51.23 | 42.70 | 35.68 | 51.99 | |||||||||||||
1967 | 31.42 | 36.18 | 41.71 | 42.93 | 53.23 | 60.07 | 73.06 | 71.55 | 65.90 | 53.26 | 45.90 | 33.48 | 50.72 | |||||||||||||
1968 | 37.39 | 44.38 | 42.87 | 47.47 | 52.23 | 61.41 | a | 70.33 | a | 67.58 | 62.37 | 51.61 | 43.40 | 34.35 | 51.28 | |||||||||||
1969 | 42.58 | 39.11 | 39.52 | 47.73 | 56.77 | 62.53 | 73.35 | 74.16 | 64.47 | 49.65 | 46.20 | 40.77 | a | 53.07 | ||||||||||||
1970 | 36.26 | 44.18 | 44.87 | 45.03 | 56.32 | 64.87 | 76.58 | 74.42 | 64.40 | 51.16 | 43.93 | 39.77 | 53.48 | |||||||||||||
1971 | 34.16 | 37.68 | 42.87 | 48.17 | 53.55 | 62.50 | 74.77 | 73.10 | 65.37 | 54.47 | a | 43.40 | 38.19 | 52.35 | ||||||||||||
1972 | 33.94 | 40.79 | 49.19 | 48.37 | 55.58 | 65.57 | 74.19 | 70.74 | 65.60 | 59.23 | ----- | z | 37.48 | 54.61 | a | |||||||||||
1973 | 37.50 | a | 44.36 | 43.16 | 48.07 | 58.65 | 64.80 | 71.87 | 71.29 | 57.97 | 50.71 | 42.07 | 37.26 | 52.31 | ||||||||||||
1974 | 38.58 | 36.89 | 47.35 | 47.80 | 55.32 | 66.43 | 72.16 | 68.13 | 66.00 | 59.26 | 44.17 | 34.43 | a | 53.04 | ||||||||||||
1975 | 35.74 | 38.46 | 41.10 | 43.03 | 52.77 | 60.67 | 73.45 | 69.26 | 66.20 | 51.90 | 42.77 | 41.58 | 51.41 | |||||||||||||
1976 | 39.13 | 46.45 | 45.27 | a | 50.13 | 59.90 | 63.20 | 73.29 | 73.29 | 64.57 | 54.55 | 46.87 | 38.10 | 54.56 | ||||||||||||
1977 | 41.32 | 43.18 | 43.03 | 52.50 | 53.00 | 70.10 | 77.10 | 72.90 | 65.47 | 58.52 | 47.80 | 43.32 | 55.69 | |||||||||||||
1978 | 42.84 | 44.04 | 49.84 | 47.30 | 54.23 | 65.20 | 72.42 | 69.77 | 65.30 | 57.26 | 46.70 | 36.94 | 54.32 | |||||||||||||
1979 | 36.68 | 37.79 | 42.94 | 47.40 | 56.84 | 65.40 | 70.42 | 67.00 | 67.87 | 52.68 | 40.83 | 38.87 | 52.06 | |||||||||||||
1980 | 43.19 | 46.03 | 44.55 | 49.40 | 54.90 | 63.20 | 74.61 | 71.26 | 63.67 | 53.39 | 41.50 | 41.97 | 53.97 | |||||||||||||
1981 | 41.19 | 39.29 | 44.81 | 52.67 | 56.68 | 68.63 | 75.16 | 75.35 | 67.53 | 53.03 | 45.77 | 39.65 | 54.98 | |||||||||||||
1982 | 38.23 | 43.32 | 45.55 | 48.47 | 56.74 | 60.80 | 72.61 | 75.42 | 66.53 | 49.61 | 46.27 | 39.42 | 53.58 | |||||||||||||
1983 | 40.07 | a | 42.61 | 46.42 | 46.27 | 56.13 | 63.60 | 74.19 | 74.26 | 73.86 | b | 58.58 | 45.47 | 41.77 | a | 55.27 | ||||||||||
1984 | 38.03 | a | 39.04 | a | 43.19 | 49.33 | 62.37 | a | 65.20 | 74.45 | 74.87 | 69.23 | 52.00 | 43.17 | a | 39.90 | 54.23 | |||||||||
1985 | 38.43 | a | 39.21 | 44.58 | 53.17 | 59.35 | 66.00 | 74.94 | 72.71 | 61.37 | 55.93 | a | 41.83 | 37.06 | 53.72 | |||||||||||
1986 | 42.03 | 42.07 | 49.71 | 51.67 | 57.90 | 68.87 | 71.06 | 76.29 | 61.80 | 53.52 | 45.90 | 37.81 | 54.89 | |||||||||||||
1987 | 36.26 | 42.29 | 43.68 | 54.77 | 61.06 | 67.63 | 69.71 | 72.35 | 65.53 | 59.48 | 44.30 | 35.94 | 54.42 | |||||||||||||
1988 | 38.16 | 42.93 | 42.87 | 51.69 | a | 57.26 | 68.27 | 75.87 | 75.17 | a | 63.97 | 61.81 | 44.63 | 37.81 | 55.04 | |||||||||||
1989 | 37.29 | 42.14 | 46.74 | 55.63 | 59.13 | 66.23 | 75.87 | 72.42 | 67.57 | 56.42 | 45.47 | 37.74 | 55.22 | |||||||||||||
1990 | 38.13 | 40.57 | 49.39 | 55.00 | 59.16 | 69.50 | 76.39 | 71.45 | 69.10 | 56.52 | 47.00 | 36.52 | 55.73 | |||||||||||||
1991 | 39.00 | 46.50 | 43.32 | 48.50 | 55.87 | a | 63.60 | 73.52 | 75.19 | 68.37 | 58.68 | 45.10 | 43.13 | 55.06 | ||||||||||||
1992 | 40.74 | 45.69 | 48.13 | 54.57 | 62.84 | 66.43 | 72.94 | 74.19 | 68.40 | 57.65 | 40.90 | 38.70 | a | 55.93 | ||||||||||||
1993 | 45.55 | 44.86 | 46.65 | 50.97 | 61.23 | 66.07 | 71.35 | 73.74 | 65.93 | 57.23 | 43.53 | 38.35 | 55.45 | |||||||||||||
1994 | 36.45 | 39.79 | 47.26 | 52.23 | 58.42 | 68.93 | 74.16 | 77.10 | 69.47 | 54.45 | 41.77 | 41.61 | 55.14 | |||||||||||||
1995 | 41.48 | 47.07 | 47.29 | 49.37 | 56.74 | 63.00 | 73.65 | 76.97 | 71.40 | 54.81 | 49.47 | 39.61 | 55.90 | |||||||||||||
1996 | 37.84 | 46.17 | 46.81 | 52.80 | 60.06 | 68.93 | 76.71 | 76.35 | 67.10 | 55.06 | 46.37 | 37.71 | 55.99 | |||||||||||||
1997 | 41.97 | 40.89 | 48.32 | 52.37 | 65.23 | 64.80 | 72.74 | 76.90 | 72.59 | a | 54.97 | 45.43 | 38.19 | 56.20 | ||||||||||||
1998 | 40.68 | 42.25 | 46.27 | a | 48.43 | 56.80 | a | 63.27 | 76.16 | 77.84 | 69.90 | 55.39 | 43.90 | 38.03 | 54.91 | |||||||||||
1999 | 39.29 | 41.48 | a | 45.00 | a | 48.17 | 58.16 | 68.13 | 76.76 | b | 75.35 | 72.70 | 64.13 | 46.87 | 36.71 | 56.06 | ||||||||||
2000 | 39.94 | 43.86 | 46.90 | 55.13 | 62.48 | 71.43 | 76.00 | 77.26 | 70.67 | 58.23 | 40.07 | 39.26 | 56.77 | |||||||||||||
2001 | 40.13 | a | 40.29 | 47.77 | 52.60 | 64.87 | 70.23 | 76.29 | 75.58 | 71.57 | 59.13 | 50.33 | 36.94 | 57.14 | ||||||||||||
2002 | 38.45 | 41.93 | 44.81 | 56.23 | 60.06 | 70.00 | 76.68 | 76.03 | 70.90 | 56.68 | 47.43 | 40.42 | 56.64 | |||||||||||||
2003 | 44.10 | a | 44.96 | 47.06 | 50.67 | 62.84 | 69.30 | 79.16 | 78.23 | 72.27 | 63.16 | 46.60 | 41.16 | 58.29 | ||||||||||||
2004 | 43.29 | 41.07 | 54.97 | 55.57 | 62.90 | 69.17 | 76.23 | 74.35 | 69.97 | 57.48 | 46.67 | 41.06 | 57.73 | |||||||||||||
2005 | 44.65 | 46.61 | 47.35 | 53.37 | 63.19 | 69.63 | 77.87 | 76.68 | 69.93 | 60.68 | 48.00 | 39.23 | 58.10 | |||||||||||||
2006 | 40.13 | 43.50 | 48.10 | 53.43 | 64.10 | 73.73 | 80.87 | 77.84 | 68.97 | 57.90 | 48.17 | 38.39 | 57.93 | |||||||||||||
2007 | 38.58 | 43.64 | 50.58 | 55.20 | 63.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.38 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.21 | 40.52 | 44.39 | 49.75 | 57.39 | 65.32 | 74.48 | 73.42 | 66.76 | 54.79 | 43.49 | 37.85 | 54.05 | |||||||||||||
S.D. | 3.71 | 3.86 | 3.39 | 3.15 | 3.50 | 3.22 | 2.18 | 2.44 | 3.23 | 3.46 | 3.17 | 2.72 | 1.92 | |||||||||||||
SKEW | -0.19 | -0.38 | 0.24 | 0.20 | 0.14 | -0.01 | 0.11 | -0.39 | -0.16 | 0.31 | -0.22 | -0.25 | 0.28 | |||||||||||||
MAX | 45.55 | 47.43 | 54.97 | 56.30 | 65.23 | 73.73 | 80.87 | 78.23 | 73.86 | 64.13 | 50.53 | 44.90 | 58.29 | |||||||||||||
MIN | 27.83 | 29.83 | 36.61 | 42.93 | 50.77 | 57.10 | 69.71 | 67.00 | 57.97 | 48.23 | 35.26 | 30.47 | 50.72 | |||||||||||||
YRS | 90 | 91 | 83 | 89 | 84 | 86 | 87 | 86 | 89 | 87 | 83 | 85 | 65 |