YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.50 | t | 54.22 | 43.31 | 48.76 | j | ||
1944 | 42.44 | 41.63 | b | 47.34 | b | 52.97 | 64.46 | f | 70.77 | b | 79.16 | 81.00 | 73.15 | 65.19 | d | 47.50 | 44.63 | 58.71 | a | |||||||
1945 | 43.10 | a | 45.85 | b | 46.75 | i | 54.83 | a | 63.71 | e | 71.65 | 79.71 | 78.27 | 73.29 | a | 63.65 | 51.22 | 38.76 | d | 60.37 | a | |||||
1946 | 41.22 | h | 42.90 | g | 48.75 | g | 61.32 | b | 64.18 | 77.64 | h | 78.97 | 76.44 | ----- | z | 57.82 | a | 46.91 | c | 46.90 | a | 61.79 | e | |||
1947 | 40.35 | 50.52 | c | 53.24 | d | 57.88 | b | 68.90 | b | 73.68 | h | 81.13 | ----- | z | ----- | z | ----- | z | 44.37 | k | 40.62 | a | 56.09 | e | ||
1948 | 45.76 | d | 42.29 | e | 43.46 | e | 58.09 | n | 66.43 | a | 74.13 | 80.44 | 79.23 | 75.00 | 63.42 | 46.85 | 42.07 | b | 59.92 | a | ||||||
1949 | 31.88 | c | 39.52 | b | 49.00 | 60.55 | 65.27 | g | 73.40 | 79.19 | 78.28 | b | 75.58 | 58.71 | c | 58.10 | 43.63 | 58.89 | a | |||||||
1950 | 41.50 | 51.71 | b | 51.95 | b | 61.13 | 65.45 | 75.12 | 77.89 | 78.50 | 71.02 | 70.06 | 56.22 | 50.67 | b | 62.60 | ||||||||||
1951 | 43.11 | 46.13 | e | 49.78 | b | 56.93 | 65.79 | 73.82 | 82.95 | 78.00 | a | 77.04 | d | 62.64 | t | 49.82 | 41.40 | 60.43 | a | |||||||
1952 | 42.21 | 43.66 | 43.38 | a | 58.30 | 68.53 | a | 73.67 | g | 79.21 | 80.40 | b | 75.54 | b | 69.66 | 48.50 | b | 43.11 | 59.32 | a | ||||||
1953 | 47.48 | a | 44.76 | a | 52.62 | a | 56.95 | 59.65 | 75.40 | 80.31 | 78.34 | 76.45 | 63.98 | 54.33 | 41.71 | 61.00 | ||||||||||
1954 | 45.43 | b | 52.20 | a | 49.40 | 62.86 | a | 68.41 | c | 74.86 | e | 80.55 | 76.69 | 74.14 | b | 65.72 | b | 55.65 | 46.39 | c | 62.69 | |||||
1955 | 38.82 | c | 42.64 | 51.21 | b | 54.56 | c | 64.56 | 72.32 | e | 77.63 | a | 77.67 | d | 74.08 | l | 67.00 | c | 51.19 | i | 44.96 | s | 60.71 | c | ||
1956 | 47.19 | b | 41.46 | b | 52.32 | a | 56.08 | 67.50 | a | 78.52 | c | 78.20 | a | 76.95 | a | 78.18 | 62.35 | 51.02 | b | 44.60 | f | 62.71 | a | |||
1957 | 43.34 | 53.50 | a | 51.55 | a | 55.27 | 58.96 | f | 76.27 | 80.62 | a | 76.74 | d | 73.75 | f | 59.61 | c | 46.52 | g | 47.10 | a | 60.44 | c | |||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 45.34 | 44.17 | b | 52.24 | d | 61.40 | a | 64.02 | b | 78.83 | a | 81.41 | c | 75.20 | d | 71.80 | 63.53 | b | 52.26 | g | 45.66 | c | 62.15 | a | ||
1960 | 39.03 | a | 41.16 | a | 55.21 | 61.08 | 66.71 | b | 79.48 | 82.34 | f | 79.31 | d | 75.25 | d | 60.77 | a | 51.91 | b | 42.05 | b | 59.27 | a | |||
1961 | 46.03 | 45.87 | a | 49.71 | b | 57.98 | a | 65.16 | 78.33 | a | 80.25 | a | 76.80 | c | 69.11 | b | 59.89 | c | 46.68 | b | 39.57 | d | 59.62 | |||
1962 | 39.73 | a | 44.09 | 44.53 | a | 62.60 | a | 63.32 | c | 74.82 | 79.85 | 80.39 | d | 74.11 | c | 64.24 | b | 55.97 | 47.13 | a | 60.90 | |||||
1963 | 39.82 | c | 52.44 | a | 49.98 | c | 54.21 | b | 68.69 | 71.53 | 83.15 | 76.98 | d | 75.70 | b | 67.07 | b | 52.15 | g | 45.62 | c | 62.29 | a | |||
1964 | 40.13 | 41.13 | c | 45.25 | c | 55.09 | a | 64.87 | 72.86 | a | 81.50 | 76.03 | a | 71.32 | 67.45 | b | 47.55 | a | 42.69 | 58.82 | ||||||
1965 | 44.79 | b | 45.18 | 46.30 | d | 54.12 | a | 60.66 | 68.20 | 78.82 | 77.76 | 67.60 | 64.91 | b | 53.74 | a | 43.85 | 58.83 | ||||||||
1966 | 41.13 | 41.61 | 53.90 | 61.33 | 69.56 | 75.70 | e | 81.82 | 79.27 | 75.00 | a | 63.60 | 53.67 | 44.85 | 61.79 | |||||||||||
1967 | 43.94 | 48.75 | 53.21 | 52.45 | 63.43 | b | 69.62 | 78.61 | 75.97 | 70.87 | 61.47 | 52.00 | 34.74 | 58.75 | ||||||||||||
1968 | 40.15 | 48.72 | 48.52 | 52.15 | 62.26 | 70.63 | 77.45 | 73.19 | 69.71 | a | 60.42 | 48.63 | 37.98 | 57.48 | ||||||||||||
1969 | 45.23 | 42.48 | b | 44.82 | 55.70 | 63.55 | 69.21 | b | 78.82 | a | 80.95 | 72.43 | b | 58.52 | 50.79 | b | 45.37 | d | 58.99 | |||||||
1970 | 42.21 | c | 49.09 | a | 47.97 | 52.04 | b | 65.15 | 74.42 | 81.15 | a | 79.42 | a | 67.22 | 56.39 | 50.10 | a | 39.58 | 58.73 | |||||||
1971 | 40.56 | d | 43.95 | i | 49.76 | j | 53.94 | f | 59.52 | 71.18 | 80.14 | b | 76.07 | b | 71.52 | e | 57.84 | l | 48.05 | j | 36.77 | k | 66.50 | f | ||
1972 | 40.88 | j | 46.42 | j | 55.52 | i | 58.36 | h | 64.38 | c | 72.74 | e | 79.54 | e | 76.67 | d | 71.03 | 57.95 | a | 44.33 | 38.96 | c | 63.20 | d | ||
1973 | 38.75 | i | 42.00 | i | 40.63 | d | 53.26 | c | 65.72 | a | 74.25 | 78.53 | 77.82 | 71.30 | b | 61.46 | d | 48.43 | a | 43.50 | 61.49 | b | ||||
1974 | 40.60 | 42.74 | a | 51.92 | 55.31 | a | 66.31 | 77.97 | 77.45 | 75.08 | 69.84 | b | 60.67 | a | 47.57 | a | 36.08 | a | 58.46 | |||||||
1975 | 38.52 | 41.73 | 44.27 | 47.97 | a | 60.87 | 70.78 | 77.87 | 78.98 | 72.62 | 61.34 | 49.20 | 44.58 | 57.39 | ||||||||||||
1976 | 44.14 | b | 47.55 | 48.76 | 53.82 | b | 66.55 | 74.05 | 80.24 | 77.82 | 70.65 | 60.98 | a | 51.42 | 42.60 | 59.88 | ||||||||||
1977 | 40.53 | 46.70 | 45.87 | 57.37 | 60.87 | a | 75.17 | 80.75 | a | 79.55 | 73.22 | a | 63.71 | 51.55 | 46.25 | a | 60.13 | |||||||||
1978 | 42.69 | 43.73 | 52.13 | 55.18 | 63.68 | 75.65 | 80.48 | 77.13 | 72.08 | 64.80 | a | 49.35 | 38.55 | a | 59.62 | |||||||||||
1979 | 36.52 | a | 42.96 | 48.24 | 56.20 | 63.45 | 74.18 | 79.74 | 75.79 | 76.05 | 63.92 | 47.23 | 45.05 | 59.11 | ||||||||||||
1980 | 43.74 | 47.29 | 47.81 | 57.65 | 60.44 | 74.43 | 81.90 | 78.60 | 73.75 | 62.42 | 52.17 | 49.19 | 60.78 | |||||||||||||
1981 | 46.95 | 48.55 | 49.55 | 61.25 | 64.92 | 79.13 | 81.97 | 79.74 | 72.73 | 59.63 | 52.52 | 44.58 | 61.79 | |||||||||||||
1982 | 41.03 | b | 46.34 | 49.07 | a | 57.53 | 65.66 | 73.58 | 79.74 | 80.32 | 73.13 | 61.87 | a | 51.19 | a | 43.55 | 60.25 | |||||||||
1983 | 45.87 | 47.93 | a | 49.48 | 51.55 | a | 65.69 | 74.78 | c | 80.39 | 78.71 | 77.04 | b | 63.35 | 50.48 | 44.93 | b | 60.85 | ||||||||
1984 | 46.35 | 46.52 | b | 53.37 | 57.45 | a | 73.00 | 76.03 | 81.13 | a | 78.53 | 75.83 | a | 58.40 | 50.62 | 43.45 | 61.72 | |||||||||
1985 | 42.50 | c | 45.26 | c | 48.42 | a | 61.10 | e | 67.48 | 80.05 | 82.69 | 81.70 | a | 69.48 | a | 63.18 | 49.31 | c | 45.69 | 61.41 | ||||||
1986 | 52.13 | a | 50.69 | b | 56.68 | a | 59.43 | c | 67.38 | a | 77.70 | 77.24 | 79.53 | a | 66.93 | a | 59.90 | a | 51.53 | a | 45.79 | b | 62.08 | |||
1987 | 41.66 | c | 46.70 | c | 48.32 | a | 62.32 | b | 66.83 | b | 79.21 | a | 79.84 | 79.10 | a | 74.57 | 68.12 | a | 50.83 | a | 41.94 | g | 63.41 | a | ||
1988 | 42.44 | d | 49.44 | d | 52.44 | 58.38 | a | 66.05 | a | 76.07 | c | 81.34 | 77.98 | 70.28 | a | 68.24 | b | 50.71 | b | 45.21 | b | 61.55 | ||||
1989 | 44.86 | j | 47.08 | i | 56.87 | h | 65.93 | i | 68.37 | e | 77.45 | a | 83.36 | c | 77.82 | a | 73.89 | c | 62.43 | c | 53.61 | c | 41.71 | l | 70.99 | e |
1990 | 42.36 | j | 43.12 | k | 52.85 | k | 59.33 | j | 64.52 | j | 79.83 | i | 80.69 | j | 78.35 | h | 75.12 | n | 64.64 | j | 50.67 | l | 40.41 | b | 40.41 | k |
1991 | 45.07 | b | 54.52 | c | 45.94 | e | 56.46 | b | 64.22 | h | 73.00 | b | 82.75 | a | 80.78 | a | 74.68 | b | 66.62 | b | 51.40 | f | 45.66 | b | 62.55 | b |
1992 | 44.27 | e | 48.44 | e | 50.62 | f | 63.12 | 67.09 | c | 74.04 | f | 78.76 | b | 78.42 | f | 73.67 | 65.79 | b | 48.43 | a | 41.71 | c | 59.03 | c | ||
1993 | 44.72 | b | 45.81 | a | 53.83 | b | 60.58 | 69.44 | g | 75.82 | 79.09 | d | 78.57 | a | 74.05 | 62.42 | a | 48.92 | 43.82 | 60.69 | a | |||||
1994 | 47.00 | g | 44.96 | d | 53.69 | d | 59.46 | c | 65.68 | a | 78.38 | 80.34 | 79.83 | b | 73.14 | e | 59.88 | c | 44.74 | g | 45.86 | c | 64.12 | b | ||
1995 | 43.64 | c | 53.42 | c | 52.97 | a | 55.65 | c | 63.56 | g | 75.80 | e | 81.63 | 81.72 | b | 75.33 | d | 65.82 | c | 58.45 | 48.35 | g | 64.44 | b | ||
1996 | 45.21 | j | 52.68 | d | 53.75 | c | 61.94 | c | 69.28 | d | 79.11 | c | 81.89 | c | 80.52 | a | 69.52 | c | 63.09 | d | 51.90 | f | 45.75 | c | 65.75 | b |
1997 | 42.38 | f | 47.17 | d | 56.67 | a | 57.02 | d | 70.98 | a | 73.07 | b | 79.87 | a | 78.46 | c | 74.90 | a | 61.50 | a | 52.69 | a | 40.65 | a | 63.00 | a |
1998 | 44.43 | c | 42.50 | f | 50.37 | d | 54.38 | e | 62.80 | f | 71.05 | b | 81.07 | c | 82.24 | b | 74.31 | d | 62.33 | e | 53.21 | a | 46.02 | c | 61.94 | b |
1999 | 47.40 | b | 51.77 | b | 54.22 | f | 53.21 | d | 65.75 | a | 75.10 | 78.29 | b | 79.26 | d | 73.16 | e | 66.53 | a | 58.87 | 45.09 | b | 63.13 | a | ||
2000 | 46.74 | b | 50.02 | c | 51.32 | c | 63.54 | e | 71.60 | e | 78.60 | e | 81.58 | a | 79.00 | e | 76.78 | e | 59.20 | d | 44.07 | 46.41 | b | 62.41 | ||
2001 | 41.97 | a | 44.98 | g | 53.34 | c | 58.17 | d | 73.67 | b | 76.93 | c | 78.74 | b | 78.71 | 77.05 | b | 67.05 | a | 55.18 | 43.18 | a | 64.00 | a | ||
2002 | 44.52 | c | 49.12 | b | 52.38 | e | 61.33 | a | 67.40 | b | 80.41 | a | 84.67 | d | 80.71 | b | 73.28 | a | 63.24 | d | 54.56 | d | 45.43 | b | 63.09 | |
2003 | 53.18 | c | 45.08 | c | 51.21 | 54.65 | c | 70.62 | c | 77.02 | 85.48 | 81.88 | c | 77.90 | a | 71.84 | 51.82 | b | 45.73 | a | 63.87 | |||||
2004 | 47.29 | b | 45.38 | c | 62.41 | d | 58.69 | c | 69.06 | 77.46 | b | 81.57 | a | 78.81 | d | 73.71 | b | 61.86 | c | 49.41 | a | 45.96 | d | 62.64 | ||
2005 | 47.43 | c | 48.44 | c | 51.41 | c | 58.96 | e | 68.75 | g | 75.56 | d | 84.16 | b | 78.35 | a | 74.21 | d | 65.80 | d | 55.33 | c | 46.76 | d | 62.40 | a |
2006 | 45.87 | 50.50 | a | 47.87 | 59.62 | d | 72.05 | 80.26 | a | 82.09 | b | 78.38 | a | 70.75 | b | 60.94 | g | 56.50 | e | 44.33 | e | 62.56 | a | |||
2007 | 40.78 | f | 47.72 | c | 55.86 | c | 60.07 | c | 71.05 | a | 78.69 | a | 82.47 | b | 80.79 | c | 74.74 | a | 65.04 | c | 59.89 | c | 42.00 | f | 67.63 | b |
2008 | 40.89 | d | 46.48 | b | 53.78 | f | 58.65 | d | 64.04 | c | 79.00 | b | 82.40 | a | 80.90 | a | 74.85 | 67.02 | e | 55.65 | c | 44.26 | b | 63.10 | a | |
2009 | 47.72 | b | 48.46 | c | 54.06 | 58.67 | d | 72.26 | b | 74.04 | c | 84.75 | a | 81.37 | a | 75.02 | 61.58 | e | 57.29 | f | 41.80 | d | 63.61 | a | ||
2010 | 45.79 | e | 46.70 | c | 50.63 | a | 57.31 | a | 63.68 | 77.15 | 82.13 | 79.48 | c | ----- | z | ----- | z | ----- | z | ----- | z | 62.86 | d | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 43.46 | 46.75 | 50.38 | 57.49 | 66.17 | 75.26 | 80.58 | 78.64 | 73.27 | 63.24 | 51.57 | 43.66 | 60.57 | |||||||||||||
S.D. | 3.56 | 3.63 | 3.88 | 3.40 | 3.36 | 3.00 | 1.90 | 1.86 | 2.63 | 3.31 | 3.60 | 3.04 | 1.72 | |||||||||||||
SKEW | -0.16 | 0.15 | 0.06 | -0.27 | 0.17 | -0.25 | 0.39 | -0.32 | -0.44 | 0.28 | 0.25 | -0.69 | -0.06 | |||||||||||||
MAX | 53.18 | 54.52 | 62.41 | 63.54 | 73.67 | 80.41 | 85.48 | 82.24 | 78.18 | 71.84 | 59.89 | 50.67 | 63.87 | |||||||||||||
MIN | 31.88 | 39.52 | 40.63 | 47.97 | 59.52 | 68.20 | 77.24 | 73.19 | 66.93 | 56.39 | 44.07 | 34.74 | 57.39 | |||||||||||||
YRS | 57 | 58 | 57 | 61 | 57 | 61 | 64 | 63 | 60 | 60 | 55 | 59 | 30 |