YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | 25.83 | y | 39.29 | 48.97 | a | 58.67 | 66.10 | 75.83 | 79.81 | 79.29 | 74.80 | 60.52 | 58.57 | 41.23 | 62.10 | a | ||||||||||
1950 | 40.42 | 46.11 | 49.97 | 61.43 | 67.10 | 79.83 | 78.52 | 79.68 | 69.63 | 70.35 | 56.47 | 48.58 | 62.34 | |||||||||||||
1951 | 39.23 | 43.61 | 48.35 | 54.87 | 67.40 | a | 76.93 | 83.42 | 78.74 | 75.57 | 60.45 | 46.30 | 38.42 | 59.44 | ||||||||||||
1952 | 39.16 | 38.28 | 40.20 | a | 56.03 | 66.97 | a | 78.07 | 80.81 | 79.39 | 74.70 | 70.10 | 44.10 | 38.06 | 58.82 | |||||||||||
1953 | 43.90 | 41.50 | 50.17 | b | 56.41 | a | 60.23 | 78.90 | 81.55 | 77.83 | a | 78.20 | 66.00 | a | 46.70 | 35.55 | 59.75 | |||||||||
1954 | 41.81 | 49.50 | 46.32 | 63.97 | 66.94 | 79.17 | 80.29 | 77.97 | 70.45 | a | 58.13 | 54.20 | 43.29 | 61.00 | ||||||||||||
1955 | 33.94 | 36.04 | 48.97 | 57.27 | 69.45 | b | 77.53 | 77.42 | 75.87 | 76.27 | 66.35 | ----- | z | ----- | z | 61.91 | b | |||||||||
1956 | ----- | z | ----- | z | ----- | z | ----- | z | 71.12 | e | 80.70 | 79.34 | b | ----- | z | 78.00 | s | 65.39 | 50.43 | 42.94 | 64.99 | f | ||||
1957 | 39.10 | 49.50 | 47.06 | 53.83 | 60.10 | 76.73 | 80.77 | 76.43 | a | 74.57 | 59.87 | 43.77 | 47.10 | 59.07 | ||||||||||||
1958 | 40.00 | 44.50 | 41.57 | a | 54.20 | 71.52 | 80.67 | 84.35 | 80.19 | 71.20 | 65.00 | 51.50 | 49.19 | 61.16 | ||||||||||||
1959 | 45.32 | 41.93 | 51.58 | 60.45 | a | 70.23 | 81.40 | 84.13 | 77.03 | 76.60 | 62.06 | 53.00 | 45.03 | 62.40 | ||||||||||||
1960 | 36.58 | 36.24 | 50.06 | 59.37 | 67.87 | 78.77 | h | 86.29 | 85.65 | 81.03 | 60.50 | i | 53.10 | 38.73 | a | 59.49 | b | |||||||||
1961 | 44.58 | 45.68 | 48.60 | a | 58.40 | 71.04 | g | 82.70 | 83.74 | 79.87 | a | 74.27 | 65.29 | 46.79 | a | 39.94 | 60.90 | a | ||||||||
1962 | 40.43 | a | 44.43 | 43.97 | 60.70 | 68.35 | 80.57 | 83.29 | 82.48 | 73.93 | 66.90 | 55.93 | 44.19 | j | 63.73 | a | ||||||||||
1963 | 38.50 | a | 46.07 | a | 49.35 | 56.62 | a | 72.54 | g | 77.67 | 84.81 | 76.00 | 75.70 | 69.84 | 53.93 | 47.94 | 61.49 | a | ||||||||
1964 | 40.81 | 37.52 | 41.65 | 54.03 | 69.13 | 79.54 | b | 82.77 | 77.94 | 70.93 | 68.29 | 51.24 | a | 41.42 | 59.61 | |||||||||||
1965 | 43.45 | 41.85 | a | 44.03 | a | 54.23 | 62.39 | 70.20 | 79.55 | 78.81 | 71.03 | 69.48 | 56.37 | 42.90 | a | 59.52 | ||||||||||
1966 | 37.19 | 39.75 | 51.68 | 59.90 | 70.71 | 78.23 | 84.19 | 80.48 | 73.85 | j | 64.58 | 56.90 | 44.70 | a | 60.76 | a | ||||||||||
1967 | 41.32 | 47.57 | 54.90 | b | 56.57 | 65.97 | 73.40 | 79.29 | 77.23 | 71.42 | f | 66.74 | 58.57 | i | 36.23 | 59.92 | b | |||||||||
1968 | 40.40 | a | 44.74 | j | 47.52 | 52.10 | 65.32 | 79.53 | 79.73 | e | 73.18 | c | 72.27 | 66.84 | 47.83 | 39.20 | f | 62.47 | b | |||||||
1969 | 43.30 | a | 40.56 | a | 43.52 | 58.30 | 64.85 | e | 78.00 | f | 81.29 | c | 79.04 | e | 69.92 | f | 57.09 | h | 46.37 | c | 42.14 | j | 57.15 | d | ||
1970 | 36.96 | d | 47.00 | e | 41.62 | b | 51.32 | h | 66.21 | g | 75.45 | a | 80.73 | a | 77.71 | 70.48 | a | 55.13 | a | 51.24 | e | 43.78 | d | 58.01 | b | |
1971 | 38.90 | b | 41.36 | 49.57 | c | 55.83 | 63.97 | a | 76.72 | a | 82.71 | 77.06 | 69.56 | c | 55.26 | ----- | z | 35.27 | e | 58.75 | a | |||||
1972 | 40.57 | a | 45.28 | d | 58.86 | c | 59.41 | a | 67.43 | a | 74.44 | e | 81.59 | b | 77.63 | a | 70.86 | b | 57.00 | 39.79 | f | 36.04 | f | 63.31 | b | |
1973 | 35.07 | c | 37.37 | a | 40.45 | 47.40 | 61.63 | a | 74.10 | 78.50 | a | 78.62 | b | 71.59 | c | 64.37 | a | 48.50 | f | 41.00 | 57.28 | a | ||||
1974 | 34.81 | d | 39.12 | c | 52.04 | c | 54.30 | c | 70.21 | b | 81.81 | d | 77.57 | a | 75.64 | f | 71.67 | 60.23 | e | 48.36 | b | 38.54 | e | 57.15 | a | |
1975 | 37.21 | b | 38.59 | a | 43.44 | d | 48.89 | c | 61.36 | c | 74.87 | 77.04 | c | 78.07 | a | 68.87 | 62.42 | e | 50.07 | a | 39.96 | d | 56.73 | |||
1976 | 37.89 | c | 44.31 | c | 45.41 | b | 55.38 | a | 64.63 | a | 76.73 | 78.38 | b | 75.16 | 69.38 | a | 57.33 | d | 49.31 | d | 42.41 | b | 58.03 | |||
1977 | 35.14 | b | 41.64 | 43.45 | b | 57.62 | a | 63.21 | b | 78.43 | 78.97 | b | 78.00 | a | 71.25 | b | 63.21 | b | 49.96 | c | 43.07 | b | 58.66 | |||
1978 | 36.70 | a | 38.96 | a | 46.42 | 56.07 | b | 62.83 | a | 78.45 | a | 82.27 | e | 78.29 | c | 71.17 | 64.39 | 45.90 | a | 33.90 | b | 57.94 | ||||
1979 | 32.00 | a | 40.22 | a | 43.17 | a | 53.57 | 60.17 | a | 73.17 | 81.48 | b | 76.32 | 76.43 | b | 66.57 | a | 41.04 | b | 44.56 | d | 57.39 | ||||
1980 | 37.38 | b | 41.61 | a | 43.13 | a | 53.27 | 61.60 | a | 79.70 | 82.52 | b | 78.32 | 73.50 | 61.62 | b | 52.07 | a | 49.32 | c | 59.50 | |||||
1981 | 46.43 | a | 46.31 | b | 42.71 | c | 58.64 | b | 64.74 | 79.41 | c | 77.72 | b | 77.20 | a | 70.73 | 60.46 | c | 54.97 | a | 45.61 | 60.41 | ||||
1982 | 37.45 | 40.04 | a | 44.54 | c | 55.33 | 62.84 | 75.14 | b | 78.57 | a | 75.10 | a | 71.27 | d | 60.23 | 44.83 | 38.48 | b | 56.98 | ||||||
1983 | 42.32 | c | 39.88 | b | 43.03 | a | 48.04 | b | 62.00 | 73.73 | 79.55 | 76.81 | 75.14 | a | 60.70 | a | 48.48 | a | 38.66 | b | 57.36 | |||||
1984 | 41.55 | 42.93 | 49.93 | b | 52.83 | 72.10 | 75.00 | 79.42 | 75.24 | b | 72.67 | 52.14 | c | 50.03 | a | 40.32 | 58.68 | |||||||||
1985 | 39.03 | a | 38.43 | 46.97 | 57.63 | 65.23 | a | 78.83 | 80.30 | a | 78.41 | b | 69.23 | 61.65 | 44.93 | b | 43.57 | c | 58.69 | |||||||
1986 | 49.83 | b | 44.61 | 54.25 | c | 56.24 | a | 65.25 | c | 73.88 | e | 75.81 | ----- | z | 67.93 | a | 60.04 | e | 48.46 | b | 40.45 | 57.89 | a | |||
1987 | 38.04 | e | 39.44 | a | 45.64 | c | 58.39 | b | 62.27 | a | 76.37 | c | 78.83 | a | 73.13 | a | 71.20 | 66.20 | a | 49.59 | a | 38.06 | 58.10 | |||
1988 | 38.63 | a | 44.50 | a | 48.27 | a | 54.67 | 64.90 | 75.40 | 78.13 | 75.06 | 70.66 | a | 68.97 | 49.22 | c | 40.06 | 59.04 | ||||||||
1989 | 37.83 | a | 42.29 | 54.87 | 65.73 | 71.48 | 78.53 | 83.90 | 77.48 | 75.07 | 62.37 | a | 52.53 | 44.00 | 62.17 | |||||||||||
1990 | 38.77 | a | 40.21 | 48.13 | 57.40 | 64.23 | 81.57 | 76.93 | a | 74.27 | a | 72.21 | b | 63.17 | a | 52.71 | b | 39.04 | c | 59.05 | ||||||
1991 | 38.10 | b | 47.93 | 43.17 | b | 55.83 | a | 67.23 | a | 73.13 | 79.03 | b | 77.22 | d | 72.69 | d | 67.11 | d | 44.81 | c | 39.20 | a | 58.79 | |||
1992 | 37.97 | 41.21 | 48.16 | 61.59 | a | 63.42 | 73.67 | c | 78.41 | b | 76.57 | c | 74.93 | a | 67.15 | d | 44.00 | a | 36.21 | c | 58.61 | |||||
1993 | 39.42 | 39.36 | 47.80 | a | 58.22 | c | 66.50 | a | 76.40 | 81.43 | a | 76.61 | 72.97 | 61.33 | a | 47.21 | a | 42.42 | 59.14 | |||||||
1994 | 44.13 | 40.71 | 50.68 | 54.60 | 66.03 | b | 82.47 | 84.47 | a | 80.66 | b | 72.10 | a | 60.86 | c | 43.62 | d | 43.24 | b | 60.30 | ||||||
1995 | 38.39 | 48.39 | 48.65 | 51.77 | 60.52 | 73.93 | a | 80.34 | b | 80.17 | a | 72.77 | 66.37 | a | 56.03 | a | 45.43 | a | 60.23 | |||||||
1996 | 42.14 | b | 48.61 | a | 48.72 | b | 62.14 | b | 74.77 | 80.72 | a | 82.41 | d | 79.10 | 67.81 | c | 60.16 | 49.67 | 41.77 | 61.50 | ||||||
1997 | 36.57 | a | 42.21 | 54.71 | 52.50 | 67.45 | 74.21 | a | 81.39 | c | 75.74 | 73.72 | a | 62.41 | b | 51.07 | c | 38.90 | b | 59.24 | ||||||
1998 | 41.67 | a | 37.81 | b | 45.45 | 50.50 | 65.81 | 75.63 | 80.69 | b | 78.70 | a | 76.68 | b | 63.10 | b | 51.03 | a | 44.17 | a | 59.27 | |||||
1999 | 45.26 | 49.38 | b | 55.90 | 54.04 | b | 66.08 | e | 76.14 | a | 76.42 | e | 75.03 | b | 70.73 | 69.81 | 62.61 | b | 40.58 | 61.83 | ||||||
2000 | 44.86 | b | 46.69 | 51.07 | b | 63.26 | c | 75.79 | c | 80.12 | d | 82.22 | d | 82.07 | d | 77.50 | 60.39 | c | 40.00 | a | 44.83 | a | 62.40 | |||
2001 | 38.60 | a | 43.54 | b | 51.14 | c | 57.50 | d | 71.11 | c | 80.96 | b | 82.54 | c | 76.54 | e | 77.71 | b | 69.76 | f | 54.75 | f | 41.07 | c | 62.07 | b |
2002 | 39.00 | b | ----- | z | 49.81 | e | 63.44 | c | 70.33 | a | 87.42 | k | 82.26 | d | 80.54 | e | 72.10 | a | 61.96 | c | 50.81 | i | 37.63 | d | 61.90 | c |
2003 | 45.85 | e | 38.87 | e | 46.55 | b | 55.08 | f | 69.55 | i | 80.22 | c | 88.74 | d | 80.32 | c | 75.69 | a | 70.32 | 50.72 | a | 43.81 | d | 62.11 | b | |
2004 | 39.46 | c | 38.36 | a | 55.60 | a | 53.41 | c | 70.93 | b | 79.44 | c | 80.92 | e | 78.56 | o | 73.62 | d | 60.79 | b | 44.38 | d | 44.00 | f | 59.69 | b |
2005 | 42.93 | c | 39.80 | c | 44.25 | c | 58.13 | g | 54.38 | r | 72.96 | d | 85.68 | c | 75.69 | e | 74.25 | b | 63.52 | 58.11 | b | 44.03 | b | 60.12 | b | |
2006 | 44.40 | a | 47.75 | d | 47.42 | e | 62.61 | b | 73.38 | b | 82.85 | c | 78.93 | d | 73.14 | c | 69.50 | b | 61.11 | c | 56.08 | d | 42.73 | e | 61.66 | |
2007 | 39.50 | c | 42.84 | c | 52.69 | e | 56.26 | c | 66.86 | b | 82.34 | a | 83.52 | d | 80.61 | 75.70 | 67.90 | a | 60.23 | 39.06 | 62.29 | |||||
2008 | 36.52 | 42.03 | 50.65 | 59.00 | 65.61 | 79.50 | 82.23 | a | 82.74 | 76.20 | 66.55 | 55.14 | a | 41.37 | a | 61.46 | ||||||||||
2009 | 44.81 | 47.46 | 53.97 | a | 57.33 | 69.97 | 73.64 | b | 86.03 | 84.19 | 73.30 | c | 61.52 | d | 56.33 | 38.10 | 62.22 | |||||||||
2010 | 41.83 | a | 40.32 | 47.53 | a | 57.63 | 66.29 | 82.03 | 82.71 | 79.13 | 80.37 | 66.35 | 50.60 | 47.86 | b | 61.89 | ||||||||||
2011 | 42.45 | 41.79 | 56.35 | 60.23 | 65.67 | a | 85.20 | 85.87 | 82.61 | 76.33 | 65.26 | 51.00 | b | 42.57 | a | 62.94 | ||||||||||
2012 | 47.70 | a | 44.71 | a | 53.47 | a | 64.07 | 75.55 | 89.03 | 82.39 | ----- | z | 76.73 | 69.29 | ----- | z | ----- | z | 66.99 | c | ||||||
2013 | 39.68 | ----- | z | ----- | z | 61.33 | 69.90 | 86.50 | 81.77 | 79.00 | 73.87 | 61.73 | a | 52.40 | 43.58 | 64.98 | b | |||||||||
2014 | 49.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.90 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 40.36 | 42.52 | 48.22 | 56.91 | 66.72 | 78.07 | 81.18 | 78.12 | 73.27 | 63.56 | 50.57 | 41.72 | 59.89 | |||||||||||||
S.D. | 3.69 | 3.63 | 4.37 | 3.94 | 3.90 | 3.63 | 2.69 | 2.59 | 2.94 | 4.08 | 4.87 | 3.57 | 1.72 | |||||||||||||
SKEW | 0.47 | 0.30 | 0.22 | -0.07 | 0.33 | 0.44 | 0.31 | 0.44 | 0.37 | -0.31 | 0.12 | 0.13 | 0.12 | |||||||||||||
MAX | 49.90 | 49.50 | 58.86 | 65.73 | 75.79 | 89.03 | 88.74 | 85.65 | 81.03 | 70.35 | 62.61 | 49.32 | 62.94 | |||||||||||||
MIN | 32.00 | 36.04 | 40.20 | 47.40 | 60.10 | 70.20 | 75.81 | 73.13 | 67.81 | 52.14 | 40.00 | 33.90 | 56.73 | |||||||||||||
YRS | 64 | 61 | 63 | 61 | 60 | 62 | 65 | 60 | 61 | 62 | 57 | 58 | 41 |