YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | 47.96 | f | 52.50 | 59.84 | 71.80 | 78.45 | 74.89 | 66.08 | 54.52 | 40.35 | 43.23 | c | 60.18 | c | ||||||||
1958 | 35.00 | 42.41 | 40.42 | 51.86 | a | 65.15 | 75.62 | a | 77.17 | a | 75.76 | 66.18 | 54.69 | 47.32 | 40.60 | 56.01 | ||||||||||
1959 | 38.19 | d | 38.30 | a | 44.55 | 54.91 | c | 62.60 | 73.07 | 73.30 | p | 72.72 | k | 66.68 | 55.87 | 43.16 | a | 38.69 | j | 53.03 | c | |||||
1960 | 34.24 | 33.76 | 46.23 | 54.75 | 61.69 | g | 71.79 | k | 72.98 | e | 73.96 | h | 68.63 | d | 56.25 | a | 45.85 | c | 31.31 | 49.33 | c | |||||
1961 | 33.31 | g | 41.34 | 45.55 | a | 53.96 | f | 63.85 | g | 71.22 | c | 73.79 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.70 | i | |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.02 | 76.59 | i | 72.10 | e | 68.89 | c | 60.52 | c | 46.60 | i | 35.21 | c | 61.15 | g | |
1964 | 33.89 | d | 29.85 | e | 40.67 | h | 52.59 | h | 62.42 | k | 71.53 | m | 77.45 | 76.04 | f | 68.40 | e | 59.37 | e | 46.32 | m | 38.71 | g | 53.79 | g | |
1965 | 40.52 | e | 34.65 | k | 39.84 | f | 56.89 | g | 62.89 | i | 68.53 | j | 76.38 | s | 72.32 | f | 64.62 | i | 57.24 | d | 47.77 | j | 42.43 | i | 48.88 | j |
1966 | 29.06 | d | 36.63 | b | 49.76 | l | 55.70 | b | 64.06 | e | 71.38 | a | 79.11 | i | 71.46 | h | 67.00 | d | 55.02 | d | 48.58 | f | 38.23 | e | 52.13 | d |
1967 | 37.07 | c | 41.06 | d | 51.57 | c | 56.39 | h | 62.21 | c | 70.67 | f | 76.10 | e | 71.80 | k | 65.18 | h | 58.56 | d | 45.43 | g | 32.70 | i | 54.43 | f |
1968 | 37.20 | d | 41.90 | d | 44.67 | g | 51.93 | 62.20 | f | 72.55 | i | 72.79 | c | 71.02 | f | 64.85 | f | 58.08 | e | 42.23 | h | 35.30 | u | 52.38 | g | |
1969 | 44.40 | a | 40.09 | e | 39.52 | e | 56.96 | d | 63.52 | g | 69.94 | d | 77.83 | g | 76.35 | r | 67.67 | i | 54.38 | e | 42.53 | l | 38.91 | n | 50.88 | f |
1970 | 33.95 | i | 43.74 | i | 42.42 | f | 52.95 | j | 63.15 | h | 69.48 | i | 76.66 | f | 74.84 | i | 69.02 | i | 55.28 | h | 46.16 | k | 41.84 | c | 41.84 | k |
1971 | 35.50 | f | 38.17 | d | 49.33 | g | 53.26 | i | 62.83 | j | 73.86 | i | 74.68 | l | 71.37 | p | 64.05 | h | 55.28 | f | 48.29 | m | 36.07 | j | 38.17 | k |
1972 | 39.96 | e | 40.72 | k | 52.27 | i | 59.08 | r | 63.30 | f | 71.67 | g | 73.97 | n | 71.46 | r | 66.71 | p | 52.40 | p | 40.77 | o | 37.68 | n | 39.96 | k |
1973 | 34.44 | g | 38.92 | h | 44.75 | o | 45.92 | j | 61.08 | m | 68.47 | k | 73.38 | o | 73.70 | i | 66.41 | m | 58.27 | k | 50.13 | g | 39.41 | o | ----- | z |
1974 | 37.88 | j | 40.75 | h | 50.69 | g | 52.89 | p | ----- | z | ----- | z | ----- | z | 70.33 | m | 63.59 | h | 55.84 | 43.62 | f | 36.53 | 46.19 | j | ||
1975 | 37.71 | c | 38.95 | f | 45.26 | 50.42 | 58.65 | 70.36 | a | 70.95 | 71.29 | 64.36 | l | 55.15 | 41.33 | g | 38.25 | c | 55.34 | c | ||||||
1976 | 36.26 | b | 46.29 | j | 45.73 | 53.95 | ----- | z | 70.17 | f | 71.76 | b | 71.58 | a | 64.14 | b | 50.44 | 38.81 | d | 35.86 | c | 52.06 | c | |||
1977 | 33.55 | 41.85 | h | 43.40 | 53.52 | 62.82 | 72.54 | b | 75.69 | 75.29 | 69.37 | 58.08 | 46.70 | c | 45.21 | 57.83 | a | |||||||||
1978 | 34.85 | e | ----- | z | 47.60 | 57.18 | 62.30 | a | 72.72 | a | 76.77 | a | 72.34 | 64.13 | d | 56.95 | 45.37 | d | 34.46 | g | 59.02 | b | ||||
1979 | 32.20 | a | 39.94 | c | 45.19 | 48.88 | r | 63.32 | a | 66.79 | f | 74.95 | 70.58 | a | 65.22 | e | 57.83 | a | 39.18 | h | 38.85 | 54.23 | c | |||
1980 | 38.75 | g | 46.82 | o | 44.55 | b | 50.73 | 61.05 | 75.06 | c | 78.82 | i | 74.68 | a | 68.57 | h | 54.09 | c | 42.89 | c | 42.75 | i | 57.58 | e | ||
1981 | 35.73 | c | 43.86 | c | 44.52 | d | 58.35 | 63.13 | a | 74.05 | a | 75.69 | d | 71.73 | 66.84 | e | 55.83 | e | 48.06 | d | 42.83 | e | 56.72 | |||
1982 | 39.88 | g | 42.14 | j | 47.50 | a | 54.75 | f | 61.95 | 71.10 | 76.43 | a | 75.48 | c | 67.38 | a | 53.73 | a | 43.62 | b | 36.76 | j | 62.15 | d | ||
1983 | 37.57 | d | 41.85 | h | 46.14 | b | 47.89 | c | 58.52 | 67.67 | 74.30 | d | 74.80 | c | 70.77 | b | 57.87 | 46.38 | a | 33.52 | f | 58.19 | b | |||
1984 | 34.45 | 40.60 | e | 44.88 | b | 51.06 | d | 65.52 | c | 70.37 | d | 73.78 | f | 70.16 | f | 63.20 | e | 51.63 | a | 45.02 | a | 36.72 | d | 50.34 | b | |
1985 | 32.67 | a | 37.63 | e | 46.80 | a | 56.12 | 63.02 | c | 69.52 | c | 72.89 | c | 73.80 | d | 64.75 | d | 55.66 | f | 47.35 | f | 36.69 | b | 55.39 | b | |
1986 | 41.12 | a | 41.25 | b | 50.05 | b | 55.69 | d | 62.14 | c | 69.16 | k | 72.81 | d | 71.96 | h | 64.38 | a | 52.52 | b | 40.50 | a | 34.20 | d | 51.47 | b |
1987 | 34.13 | a | 38.26 | a | 42.88 | a | 51.31 | a | 59.38 | a | 68.50 | b | 72.32 | a | 70.84 | 63.79 | b | 58.43 | b | 42.45 | a | 34.45 | 53.06 | |||
1988 | 35.30 | d | 40.91 | 44.30 | c | 52.96 | d | 59.71 | b | 70.45 | a | 73.16 | l | 71.65 | d | 65.20 | b | 57.52 | c | 47.30 | b | 33.68 | i | 54.53 | b | |
1989 | 38.32 | a | 37.41 | 50.05 | b | 56.46 | e | 66.71 | b | 70.43 | c | 74.39 | d | 72.44 | e | 62.88 | d | 56.05 | b | 45.85 | 32.33 | e | 55.28 | |||
1990 | 37.80 | c | 40.17 | a | 46.97 | 53.91 | b | 62.59 | b | 77.43 | 72.53 | b | 69.80 | a | 67.19 | f | 57.45 | c | 47.34 | a | 33.48 | e | 54.50 | a | ||
1991 | 36.09 | c | 42.72 | c | 46.19 | 55.81 | a | 64.79 | c | 72.13 | 71.65 | d | 70.81 | b | 63.27 | b | 56.77 | c | 41.12 | a | 35.12 | e | 54.71 | |||
1992 | 32.86 | b | 41.29 | c | 47.19 | b | 57.59 | a | 60.42 | e | 69.44 | d | 73.85 | g | 72.58 | 66.89 | b | 58.27 | e | 40.80 | b | 35.79 | 53.01 | a | ||
1993 | 39.71 | c | 39.60 | b | 47.69 | 54.78 | a | 62.62 | c | 71.71 | d | 77.13 | e | 72.93 | d | 65.92 | 51.96 | e | 41.95 | 38.69 | e | 55.39 | ||||
1994 | 39.43 | d | 38.60 | b | 48.41 | c | 53.53 | a | 62.55 | c | 76.37 | g | 76.36 | i | 75.02 | d | 67.11 | g | 54.65 | g | 46.05 | a | 40.67 | g | 51.94 | e |
1995 | 39.70 | k | 46.11 | f | 49.52 | g | 51.53 | a | 62.67 | e | 70.45 | a | 74.46 | h | 75.86 | c | 67.40 | d | 57.50 | e | 50.73 | f | 40.74 | h | 64.24 | f |
1996 | 39.93 | j | 43.68 | a | 44.76 | h | 55.38 | a | 71.17 | d | 74.81 | c | 74.34 | f | 72.43 | c | 64.65 | f | 55.17 | h | 45.17 | j | 43.48 | i | 63.49 | g |
1997 | 33.54 | f | 34.94 | d | 47.69 | b | 48.10 | a | 61.98 | h | 68.91 | b | 74.58 | f | 73.72 | f | 69.37 | c | 56.15 | a | 41.67 | d | 32.28 | h | 52.40 | e |
1998 | 40.57 | a | 40.37 | a | 44.05 | a | 50.74 | c | 65.00 | b | 73.43 | a | 75.96 | g | 71.77 | e | 69.76 | a | 55.19 | e | 48.62 | b | 37.82 | i | 55.95 | b |
1999 | 44.54 | d | 44.92 | d | 46.65 | d | 53.50 | e | 60.74 | d | 67.87 | d | 72.94 | f | 73.93 | d | 65.19 | d | 57.02 | h | 49.98 | e | 36.75 | e | 54.41 | b |
2000 | 38.94 | g | 46.76 | d | 47.20 | a | 57.03 | 67.35 | e | 72.06 | c | 77.10 | j | 75.52 | b | 69.36 | b | 56.86 | c | 38.70 | c | 34.15 | h | 58.98 | c | |
2001 | 32.35 | a | 41.17 | g | 46.06 | d | 57.38 | b | 64.21 | j | 73.40 | d | 77.88 | j | 73.18 | c | 68.41 | c | 57.86 | c | 47.07 | b | 37.12 | e | 54.76 | c |
2002 | 40.45 | c | 38.43 | a | 45.17 | e | 59.75 | d | 62.81 | m | 74.96 | d | ----- | z | 75.46 | c | 66.36 | a | 53.42 | f | 44.86 | e | 38.34 | b | 53.75 | c |
2003 | 42.50 | a | 40.46 | e | 48.74 | b | 55.91 | a | 64.68 | 70.67 | 77.50 | j | 74.30 | c | 68.54 | f | 60.28 | d | 48.13 | c | 40.50 | i | 56.19 | c | ||
2004 | 40.12 | c | 35.52 | f | 52.08 | e | 52.61 | c | 64.70 | c | 71.57 | b | 74.11 | i | 70.88 | b | 65.36 | b | 56.75 | e | 42.06 | c | 39.35 | e | 55.55 | b |
2005 | 42.80 | c | 41.17 | a | 44.95 | j | 53.50 | b | 62.53 | b | 73.17 | d | 75.21 | l | 71.28 | a | 69.15 | c | 55.81 | g | 48.24 | c | 38.52 | e | 55.60 | c |
2006 | 41.29 | 41.48 | b | 45.62 | e | 58.88 | 68.41 | b | 74.46 | c | 76.32 | q | 71.90 | j | 61.55 | b | 54.10 | f | 48.11 | g | 38.59 | c | 53.79 | d | ||
2007 | 29.91 | c | 42.12 | b | 49.12 | a | 50.17 | f | 59.80 | d | 69.85 | d | 73.75 | i | 75.52 | d | 68.15 | g | 58.42 | g | 48.33 | c | 37.59 | d | 51.53 | d |
2008 | 33.91 | c | 42.12 | c | 47.90 | b | 54.20 | e | 63.60 | f | 74.98 | h | 71.79 | j | 71.48 | c | 64.72 | c | 55.96 | g | 46.74 | a | 38.10 | e | 49.90 | d |
2009 | 40.34 | b | 44.70 | a | 50.83 | b | 54.14 | e | 65.76 | f | ----- | z | 77.81 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.50 | h |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.13 | 40.20 | 46.43 | 54.17 | 63.00 | 71.70 | 74.53 | 73.09 | 66.37 | 56.26 | 44.73 | 37.58 | 55.19 | |||||||||||||
S.D. | 3.83 | 3.26 | 2.68 | 2.80 | 2.79 | 2.32 | 2.24 | 1.85 | 2.30 | 2.31 | 3.14 | 3.17 | 1.25 | |||||||||||||
SKEW | -0.01 | -0.87 | -0.18 | -0.21 | 0.75 | 0.38 | 0.08 | 0.08 | -0.01 | -0.55 | -0.34 | 0.36 | -0.64 | |||||||||||||
MAX | 44.54 | 46.76 | 52.08 | 59.75 | 71.17 | 77.43 | 78.45 | 75.86 | 70.77 | 60.52 | 49.98 | 45.21 | 56.72 | |||||||||||||
MIN | 29.06 | 29.85 | 39.52 | 47.89 | 58.52 | 67.67 | 70.95 | 69.80 | 61.55 | 50.44 | 38.70 | 31.31 | 53.06 | |||||||||||||
YRS | 39 | 35 | 38 | 39 | 34 | 36 | 21 | 33 | 34 | 37 | 32 | 29 | 6 |