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 | 74.94 | v | 66.19 | 48.34 | a | 40.86 | c | 51.80 | i | |
1922 | 33.25 | a | 40.19 | a | 48.35 | d | 54.08 | d | 68.77 | c | 81.55 | 86.65 | 83.87 | 78.38 | 62.61 | 46.42 | 42.68 | 60.57 | ||||||||
1923 | 39.98 | 41.71 | 49.13 | 60.03 | 71.79 | 75.36 | a | 85.47 | a | 81.23 | 71.98 | 58.87 | 48.03 | 37.78 | a | 60.11 | ||||||||||
1924 | 33.15 | 45.64 | 49.06 | 60.09 | a | 71.60 | a | 81.14 | a | 85.32 | 84.34 | 73.30 | 59.40 | 46.03 | 31.03 | 60.01 | ||||||||||
1925 | 25.50 | 44.21 | 52.32 | 62.35 | d | 74.60 | 78.42 | 88.20 | d | 80.40 | e | 72.04 | c | 61.18 | t | ----- | z | 38.55 | a | 61.66 | b | |||||
1926 | 35.05 | 44.57 | a | 52.08 | a | 60.39 | b | 70.00 | 81.26 | a | 84.82 | 83.98 | 74.83 | 62.85 | 49.82 | b | 36.92 | 61.38 | ||||||||
1927 | 37.76 | 46.07 | 50.55 | b | 61.20 | 71.27 | 78.78 | 86.56 | 81.31 | 74.20 | 62.81 | o | 51.85 | 38.03 | 61.60 | a | ||||||||||
1928 | 39.65 | 45.48 | 55.60 | b | 59.84 | a | 72.37 | 79.98 | a | 86.27 | 82.69 | b | 78.67 | a | 63.34 | 49.00 | 34.78 | a | 62.31 | |||||||
1929 | 37.23 | 39.95 | 50.13 | 56.12 | 70.17 | a | 80.05 | 86.27 | 84.40 | 75.35 | c | 64.79 | e | 44.27 | b | 39.66 | c | 60.70 | ||||||||
1930 | 33.17 | e | 44.78 | c | 52.07 | b | 66.11 | c | 65.50 | b | 79.92 | f | 85.23 | e | 82.18 | 75.20 | 60.08 | 42.16 | a | 30.76 | 57.93 | a | ||||
1931 | 29.90 | e | 45.75 | d | 51.55 | b | 63.61 | b | 69.77 | c | 81.72 | 90.69 | 86.53 | a | 78.03 | 64.87 | 45.45 | 32.06 | 61.66 | |||||||
1932 | 31.68 | 43.24 | 51.86 | b | 61.98 | a | 69.74 | 77.95 | a | 86.84 | b | 84.74 | 77.12 | 61.21 | 48.60 | 32.70 | a | 60.64 | ||||||||
1933 | 29.15 | 34.20 | 52.10 | 57.53 | 63.89 | c | 82.02 | 89.20 | d | 84.68 | 80.58 | 66.87 | a | 47.77 | 39.45 | 60.62 | ||||||||||
1934 | 40.08 | 48.80 | 59.82 | 67.12 | 76.28 | a | 78.68 | b | 89.07 | a | 86.69 | 75.57 | a | 63.52 | d | 50.32 | b | 38.92 | 64.57 | |||||||
1935 | 38.04 | c | 45.29 | 50.00 | 61.98 | 66.81 | 81.77 | b | 86.30 | a | 84.85 | a | 77.15 | 62.73 | 45.27 | 36.95 | 61.43 | |||||||||
1936 | 38.32 | a | 45.67 | 54.00 | 64.10 | 72.48 | b | 83.54 | b | 87.95 | b | 85.96 | c | 74.26 | a | 61.63 | 45.30 | 38.92 | g | 64.84 | a | |||||
1937 | 25.58 | 39.50 | 51.07 | a | 60.53 | 73.31 | 79.95 | a | 86.48 | f | 84.29 | x | 76.12 | q | 63.90 | k | 49.67 | j | 42.53 | n | 54.99 | f | ||||
1938 | 39.57 | j | 45.03 | k | 51.50 | s | 62.41 | c | 64.94 | g | 78.76 | m | 83.68 | q | 83.62 | e | 73.50 | 58.35 | 36.25 | 35.95 | 58.35 | f | ||||
1939 | 34.60 | 32.75 | 49.23 | 62.18 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.69 | 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 | 82.53 | j | 89.57 | a | 86.30 | c | 79.04 | c | 64.52 | e | 47.88 | e | 42.05 | c | 68.23 | f |
1944 | 36.69 | d | 43.58 | c | 49.66 | i | 57.90 | e | 70.90 | g | 76.62 | f | 87.50 | e | 86.60 | g | 80.38 | d | ----- | z | 50.89 | k | 38.69 | j | 61.21 | g |
1945 | 39.59 | b | 47.43 | 49.76 | b | 59.90 | d | 73.16 | b | 78.75 | b | 88.65 | e | 86.44 | d | 78.48 | c | 65.48 | c | 47.77 | f | 36.55 | c | 64.02 | a | |
1946 | 37.20 | d | 43.84 | c | 54.56 | e | 67.31 | d | 71.45 | c | 83.70 | e | 87.91 | c | 86.05 | 78.43 | g | 59.79 | c | 47.56 | c | 42.23 | e | 61.96 | a | |
1947 | 37.05 | a | 49.17 | d | 57.80 | c | 63.26 | c | 75.76 | d | 79.44 | e | 87.83 | b | 84.52 | h | 81.96 | d | 66.09 | b | 46.85 | 39.32 | 62.23 | a | ||
1948 | 37.87 | a | 42.64 | 47.46 | c | 64.29 | d | 73.60 | 80.43 | b | 87.53 | 84.47 | a | 78.78 | a | 64.47 | 45.60 | 39.32 | a | 62.20 | ||||||
1949 | 31.52 | 35.79 | 53.00 | 66.15 | 72.00 | 79.47 | 88.47 | 84.74 | 79.48 | a | 61.81 | 50.28 | 38.13 | 61.74 | ||||||||||||
1950 | 36.84 | 47.21 | 55.63 | 66.22 | 70.84 | 80.15 | 84.23 | 81.53 | 74.13 | 69.76 | 52.40 | 43.60 | a | 63.54 | ||||||||||||
1951 | 38.35 | 44.45 | 51.98 | 63.57 | 69.91 | d | 80.82 | 90.03 | 84.98 | 79.13 | 63.70 | a | 47.47 | 38.32 | a | 62.73 | ||||||||||
1952 | 37.40 | 43.31 | 49.65 | 62.77 | 73.71 | 80.77 | 87.21 | 86.69 | 78.83 | 67.52 | 46.62 | 39.00 | 62.79 | |||||||||||||
1953 | 43.48 | 45.36 | 54.42 | 61.82 | 67.68 | a | 82.42 | 88.32 | a | 84.03 | a | 78.70 | e | 63.09 | d | 50.20 | h | 37.83 | b | 64.29 | a | |||||
1954 | 39.18 | 49.72 | a | 51.53 | a | 69.34 | e | 77.09 | c | 82.32 | b | 88.98 | 84.27 | a | 78.16 | b | 65.52 | d | 51.17 | d | 36.79 | c | 64.51 | |||
1955 | 37.33 | d | 38.46 | d | 52.80 | c | 62.24 | e | 70.38 | b | 78.71 | b | 87.17 | d | 87.54 | e | 79.24 | c | 66.67 | a | 50.22 | e | 43.68 | c | 62.87 | |
1956 | 44.03 | b | 43.25 | a | 54.36 | b | 63.09 | a | 73.46 | c | 84.97 | a | 87.15 | a | 82.63 | d | 80.56 | c | 64.45 | c | 42.64 | b | 36.72 | b | 63.11 | |
1957 | 40.35 | e | 49.52 | 56.69 | d | 61.48 | c | 66.93 | a | 81.87 | 86.05 | c | 84.09 | b | 77.75 | b | 63.66 | c | 45.42 | f | 41.12 | e | 64.50 | a | ||
1958 | 39.00 | b | 49.10 | b | 50.14 | b | 61.78 | a | 75.72 | a | 84.04 | d | 88.02 | d | 88.98 | b | 76.88 | b | 64.72 | f | 48.36 | b | 40.50 | g | 66.20 | b |
1959 | 39.85 | a | 45.36 | c | 55.18 | c | 65.19 | c | 72.43 | a | 85.10 | d | 90.36 | b | 85.34 | f | 77.52 | b | 63.79 | e | 48.15 | f | 41.40 | f | 66.09 | c |
1960 | 35.10 | e | 43.64 | a | 56.61 | c | 62.80 | c | 73.09 | b | 85.23 | b | 89.60 | e | 88.46 | e | 80.66 | e | 62.86 | b | 48.61 | g | 36.09 | c | 64.92 | a |
1961 | 35.29 | g | 48.02 | b | 53.10 | b | 62.21 | b | 72.55 | b | 86.66 | b | 90.83 | k | 85.23 | a | 73.34 | b | 61.76 | f | 50.00 | p | 32.06 | f | 68.73 | e |
1962 | 37.70 | d | 45.54 | a | 48.88 | b | 67.78 | a | 70.42 | a | 80.45 | h | 87.76 | j | ----- | z | 79.00 | e | 66.08 | g | 52.17 | d | ----- | z | 57.36 | e |
1963 | 31.41 | i | 49.56 | d | 52.80 | c | 59.90 | d | 74.73 | a | 78.91 | b | 90.22 | b | 83.68 | 77.81 | c | 68.76 | b | 51.71 | a | 38.36 | f | 68.81 | b | |
1964 | 37.62 | c | ----- | z | 49.85 | a | 60.71 | a | 67.62 | k | 80.27 | b | 89.13 | a | 83.94 | d | ----- | z | ----- | z | ----- | z | ----- | z | 66.92 | f |
1965 | 44.21 | e | 45.75 | b | ----- | z | ----- | z | ----- | z | 75.12 | 85.52 | 84.44 | 73.25 | 64.29 | 52.48 | 39.82 | a | 62.76 | c | ||||||
1966 | 35.82 | 38.68 | 52.89 | 63.48 | 75.05 | 82.18 | 87.13 | 87.50 | 78.25 | 63.02 | 51.67 | 39.73 | 62.95 | |||||||||||||
1967 | 36.21 | 46.12 | 56.35 | 58.08 | f | 70.15 | 78.70 | 88.56 | 85.11 | 75.76 | a | 65.32 | c | 53.02 | 31.94 | 62.48 | a | |||||||||
1968 | 28.69 | 49.76 | 54.63 | 59.38 | 71.94 | 82.37 | d | 87.17 | e | 79.89 | 75.57 | 62.74 | 48.45 | 34.95 | a | 61.29 | ||||||||||
1969 | 43.05 | a | 43.61 | 49.89 | 64.00 | 75.39 | 81.17 | 87.13 | 88.42 | a | 78.25 | 59.66 | 48.27 | 41.76 | 63.38 | |||||||||||
1970 | 40.16 | 48.00 | 50.98 | a | 57.60 | 73.82 | 80.92 | 86.84 | 87.56 | 75.48 | a | 61.32 | 51.13 | c | 39.98 | 62.82 | ||||||||||
1971 | 38.28 | a | 45.89 | 53.60 | a | 62.22 | 69.35 | a | 82.98 | 90.12 | a | 86.32 | 77.44 | d | 59.84 | 46.70 | 35.67 | e | 62.37 | |||||||
1972 | 40.13 | a | 47.22 | b | 61.03 | a | 64.93 | a | 73.17 | e | 83.31 | a | 89.71 | 85.24 | 75.87 | 59.21 | g | 46.67 | a | 35.73 | 63.91 | a | ||||
1973 | 32.92 | 43.57 | 49.32 | 59.90 | 72.91 | d | 80.20 | 87.48 | 85.97 | 76.20 | b | 63.81 | 50.38 | a | 41.40 | 62.00 | ||||||||||
1974 | 36.39 | c | 41.02 | c | 59.19 | b | 61.57 | b | 75.90 | a | 86.68 | 87.42 | 85.45 | c | 77.35 | 64.43 | a | 47.22 | g | 39.03 | 64.95 | a | ||||
1975 | 37.56 | 43.18 | 51.05 | 56.40 | 67.48 | 79.53 | 86.60 | a | 82.71 | 76.63 | 61.76 | 47.02 | ----- | z | 62.72 | a | ||||||||||
1976 | 36.89 | 48.81 | 52.34 | 60.90 | 73.23 | 81.60 | a | 87.52 | 84.45 | 75.60 | 61.92 | 49.13 | c | 35.91 | d | 62.36 | ||||||||||
1977 | 36.89 | 45.21 | 50.40 | 65.29 | b | 69.15 | a | 84.29 | b | 86.77 | 85.97 | 79.02 | 65.52 | 51.34 | b | 47.87 | l | 65.44 | a | |||||||
1978 | 42.90 | g | 46.96 | c | 54.59 | i | 63.24 | c | 70.89 | 84.03 | 88.45 | 85.42 | 75.47 | 66.44 | d | 48.63 | 33.63 | 66.32 | b | |||||||
1979 | 33.75 | a | 38.41 | 51.02 | 62.27 | 72.45 | c | 80.03 | 88.00 | 83.18 | 79.43 | 67.86 | m | 45.03 | 37.52 | 61.01 | a | |||||||||
1980 | 41.66 | 45.74 | 49.40 | 60.43 | 65.55 | 79.53 | 87.94 | 85.23 | 73.13 | 60.83 | a | 48.22 | ----- | z | 63.42 | a | ||||||||||
1981 | ----- | z | 45.24 | e | 52.71 | c | 66.13 | 71.73 | a | 86.42 | 88.73 | 84.53 | a | 77.20 | 61.48 | 50.43 | 42.59 | b | 66.11 | a | ||||||
1982 | 38.70 | f | 42.93 | e | 54.06 | 61.50 | b | 71.47 | a | 80.45 | a | 86.29 | 83.16 | 76.33 | f | 58.45 | c | 47.44 | e | 40.06 | d | 62.58 | b | |||
1983 | 40.33 | a | 47.23 | b | 55.48 | c | 57.26 | a | ----- | z | 82.25 | 86.36 | c | 84.22 | a | 77.73 | b | 65.06 | d | 52.85 | c | 42.90 | b | 62.88 | a | |
1984 | 40.23 | c | ----- | z | 48.12 | b | 57.79 | d | 75.91 | c | 80.23 | d | 87.48 | c | 84.78 | a | 80.07 | c | 60.02 | g | 51.48 | e | 41.60 | f | 67.34 | c |
1985 | 38.94 | g | 44.20 | c | 54.09 | h | 66.29 | a | 69.61 | 85.84 | a | 88.83 | b | 86.75 | a | 71.78 | a | 62.61 | d | 48.39 | b | 40.32 | 66.46 | b | ||
1986 | 43.53 | a | 52.07 | a | 59.32 | a | 66.52 | f | 74.57 | c | 85.41 | b | 87.31 | d | 86.94 | f | 72.63 | c | 59.93 | d | 50.84 | e | 41.53 | b | 62.72 | b |
1987 | 38.52 | b | 43.87 | a | 52.63 | d | 67.37 | c | 73.32 | a | 84.41 | a | 86.67 | p | 80.94 | o | 74.82 | k | 66.15 | e | 49.17 | d | 38.63 | a | 57.12 | c |
1988 | 38.61 | 47.19 | b | 51.72 | a | 61.39 | c | 69.73 | r | 83.63 | 89.94 | 85.34 | 76.52 | a | 68.14 | b | 50.66 | a | 39.55 | c | 62.97 | a | ||||
1989 | 37.04 | q | 45.56 | l | 59.17 | a | 69.52 | f | 74.40 | 82.00 | a | 89.00 | 83.61 | 76.50 | d | 61.92 | k | 49.96 | c | 40.06 | g | 73.52 | e | |||
1990 | 39.75 | g | 43.13 | m | 56.66 | i | 65.76 | m | 74.09 | i | 85.26 | g | 87.72 | h | 83.63 | e | 77.80 | 63.89 | 47.45 | 34.07 | j | 68.19 | h | |||
1991 | 35.53 | a | 45.12 | 49.02 | b | 60.38 | ----- | z | ----- | z | 88.43 | d | 85.90 | b | ----- | z | 67.17 | h | 46.55 | i | 37.60 | p | 60.73 | f | ||
1992 | 35.75 | m | 46.21 | l | 53.37 | l | 66.03 | j | 71.55 | k | 79.13 | k | 84.09 | o | 83.47 | n | 76.10 | f | 66.69 | m | 46.90 | j | 33.11 | l | ----- | z |
1993 | 40.14 | i | 45.29 | i | 54.10 | j | 61.94 | l | 72.36 | i | 79.32 | k | 86.72 | h | 81.82 | l | 74.96 | f | 59.60 | k | 43.90 | j | 37.50 | m | ----- | z |
1994 | 37.95 | l | 40.62 | d | 56.31 | 63.43 | 72.89 | 88.05 | a | 89.47 | 88.50 | 76.55 | b | 61.94 | 44.95 | b | 39.45 | c | 65.65 | a | ||||||
1995 | 41.02 | a | 50.25 | ----- | z | 59.50 | w | 68.50 | o | 76.03 | o | ----- | z | ----- | z | 77.02 | e | 64.19 | e | 53.45 | 42.50 | b | 54.74 | f | ||
1996 | 41.82 | 47.64 | 54.29 | 64.85 | g | 74.07 | c | 84.26 | a | 89.69 | 84.92 | a | 74.53 | 60.37 | a | 48.37 | 42.61 | 63.87 | a | |||||||
1997 | 41.16 | 44.55 | 56.35 | d | 56.10 | j | 75.33 | d | 82.21 | a | 86.95 | 85.35 | g | 76.28 | a | 60.19 | 50.08 | 38.60 | 61.17 | b | ||||||
1998 | 41.10 | 44.88 | b | 53.48 | 58.85 | ----- | z | 79.77 | 89.21 | 85.69 | 74.97 | a | 60.52 | 48.41 | a | 40.32 | c | 61.56 | a | |||||||
1999 | 43.48 | a | 47.79 | 57.10 | a | 57.53 | a | 71.53 | b | 82.48 | a | 84.39 | 79.68 | 74.57 | c | 63.32 | c | 50.27 | b | 38.91 | c | 62.59 | ||||
2000 | 43.22 | a | 47.91 | a | 52.72 | d | 65.47 | n | 75.65 | a | 86.43 | 89.57 | a | 88.55 | 78.17 | 63.82 | 43.98 | 41.27 | a | 64.66 | a | |||||
2001 | 38.41 | c | 44.43 | 55.57 | b | 62.74 | c | 75.86 | b | 84.37 | 87.38 | a | 85.57 | a | 79.25 | 67.39 | 53.23 | b | 37.85 | a | 64.34 | |||||
2002 | 39.48 | 42.65 | b | 51.16 | 68.87 | 74.56 | 87.23 | 92.95 | 87.98 | 76.58 | 60.89 | 47.89 | b | 40.60 | a | 64.24 | ||||||||||
2003 | 44.05 | 45.08 | b | 54.60 | a | 61.50 | a | 74.98 | b | 86.18 | b | 93.88 | c | 87.74 | b | 78.05 | a | 67.66 | c | 48.89 | c | 42.12 | b | 65.39 | ||
2004 | 38.35 | g | 41.04 | c | 60.15 | h | 63.28 | c | 75.63 | a | 84.95 | a | 88.11 | 83.78 | a | 75.74 | a | 62.08 | a | 48.40 | a | 40.00 | j | 69.22 | c | |
2005 | 45.14 | b | 45.26 | c | 52.50 | a | 58.89 | c | 75.12 | w | 81.96 | q | 91.18 | l | 82.27 | r | 77.97 | n | 64.21 | c | 50.28 | l | ----- | z | 53.20 | g |
2006 | 40.88 | g | 45.14 | 49.54 | d | 62.57 | 75.48 | 84.97 | 88.63 | 82.68 | a | 71.90 | 60.57 | a | 49.88 | 38.63 | 64.54 | a | ||||||||
2007 | 36.45 | 47.20 | 55.95 | 63.78 | 72.77 | a | 84.27 | 90.23 | 86.60 | 77.67 | 61.21 | 51.47 | 38.16 | 63.81 | ||||||||||||
2008 | 36.98 | 45.14 | 53.76 | 60.70 | 68.08 | 81.97 | 88.52 | 85.37 | 77.07 | a | 62.57 | b | 52.50 | 39.77 | i | 64.79 | a | |||||||||
2009 | 41.07 | x | ----- | z | 51.17 | v | 61.25 | 75.67 | b | 78.27 | 88.34 | 84.48 | f | 77.28 | a | 59.71 | c | 49.38 | d | 37.09 | h | 69.99 | e | |||
2010 | 36.97 | a | 44.45 | 51.21 | 60.42 | 67.15 | 82.62 | b | 88.92 | 82.92 | 78.43 | 66.12 | j | 48.05 | 44.47 | 62.33 | a | |||||||||
2011 | 38.16 | 41.80 | 54.65 | 60.20 | 67.77 | 81.68 | 86.94 | 88.10 | 77.53 | 63.27 | 48.47 | 38.19 | 62.23 | |||||||||||||
2012 | 40.71 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.68 | 44.67 | 52.92 | 62.07 | 72.06 | 81.99 | 87.98 | 84.91 | 76.81 | 63.24 | 48.62 | 38.68 | 62.41 | |||||||||||||
S.D. | 4.14 | 3.55 | 3.06 | 3.05 | 2.99 | 2.73 | 1.73 | 2.07 | 2.32 | 2.60 | 2.94 | 3.12 | 1.38 | |||||||||||||
SKEW | -0.78 | -0.92 | 0.54 | 0.08 | -0.58 | 0.02 | 0.51 | -0.26 | -0.34 | 0.24 | -1.12 | -0.58 | 0.14 | |||||||||||||
MAX | 45.14 | 52.07 | 61.03 | 69.34 | 77.09 | 88.05 | 93.88 | 88.98 | 81.96 | 69.76 | 53.45 | 44.47 | 65.39 | |||||||||||||
MIN | 25.50 | 32.75 | 47.46 | 54.08 | 63.89 | 75.12 | 84.23 | 79.68 | 71.78 | 58.35 | 36.25 | 30.76 | 60.01 | |||||||||||||
YRS | 71 | 78 | 75 | 75 | 72 | 75 | 76 | 73 | 77 | 71 | 72 | 65 | 32 |