YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.25 | 54.61 | 41.15 | c | 40.65 | 51.66 | h | |||
1958 | 38.65 | a | 43.30 | 40.42 | a | 51.02 | 63.60 | 67.80 | 73.03 | a | 76.77 | 67.53 | 57.69 | 43.05 | 40.52 | 55.28 | ||||||||||
1959 | 35.92 | 35.09 | 44.03 | 54.05 | 57.15 | 71.32 | 79.13 | 74.19 | 66.48 | a | 58.12 | a | 45.48 | 39.37 | 55.03 | |||||||||||
1960 | 30.60 | a | 34.81 | c | 48.71 | b | 54.45 | b | 61.63 | 73.73 | 78.69 | 74.98 | a | 70.55 | 54.90 | 43.90 | 35.92 | 55.24 | ||||||||
1961 | 37.74 | 40.46 | 43.69 | 52.32 | 58.89 | 74.55 | 77.89 | 73.72 | b | 61.30 | 54.02 | 39.36 | a | 32.35 | 53.86 | |||||||||||
1962 | 32.64 | m | 35.98 | h | 37.35 | 55.58 | 55.06 | 66.83 | 72.37 | 73.39 | 67.67 | 56.44 | 47.42 | 38.18 | 57.03 | b | ||||||||||
1963 | 28.95 | 43.78 | a | 40.53 | 45.82 | 62.16 | f | 64.17 | 73.98 | 73.24 | 67.33 | 58.18 | 43.13 | 35.17 | a | 52.21 | a | |||||||||
1964 | 31.06 | 33.71 | 37.37 | 47.43 | 56.10 | 66.60 | 76.00 | 72.56 | 64.02 | 60.81 | 37.83 | 34.06 | 51.46 | |||||||||||||
1965 | 38.28 | a | 36.82 | 39.24 | 46.87 | 54.27 | 62.62 | 71.81 | 69.85 | 58.12 | 58.61 | 44.83 | 34.21 | 51.29 | ||||||||||||
1966 | 31.76 | 33.16 | 45.97 | 52.48 | 61.18 | 68.05 | 72.60 | 73.84 | 65.42 | 54.61 | 43.95 | 34.11 | 53.09 | |||||||||||||
1967 | 34.65 | 42.30 | 46.40 | 44.30 | 60.18 | 66.60 | 77.66 | 75.81 | 65.97 | 57.45 | a | 46.60 | 28.90 | p | 56.17 | a | ||||||||||
1968 | 33.64 | b | 44.36 | a | 47.29 | 48.43 | a | 59.74 | 69.28 | 73.12 | c | 67.62 | b | 64.20 | e | 52.90 | b | 42.22 | 29.97 | 52.73 | ||||||
1969 | 36.02 | b | 35.29 | d | 39.27 | c | 51.53 | a | 61.26 | b | 66.35 | c | ----- | z | 76.79 | 67.16 | b | 49.17 | b | 43.58 | d | 37.91 | c | 51.30 | a | |
1970 | 34.53 | b | 42.59 | 41.45 | c | 45.35 | d | 60.48 | d | 72.29 | d | 77.94 | 76.95 | 64.19 | d | 53.91 | b | 46.93 | 36.05 | b | 54.39 | |||||
1971 | 36.48 | a | 38.86 | 45.71 | e | 51.88 | 55.58 | 70.17 | a | 77.80 | c | 75.21 | 65.44 | d | 52.43 | a | 42.39 | c | 32.07 | a | 53.67 | |||||
1972 | 34.42 | a | 40.86 | 53.48 | c | 52.50 | b | 63.44 | 71.54 | c | 79.54 | c | 75.35 | 66.15 | d | 54.44 | d | 40.11 | b | 32.20 | c | 55.34 | ||||
1973 | 29.18 | c | 39.57 | 40.72 | d | 50.78 | a | 62.92 | a | 70.53 | a | 76.23 | 73.36 | b | 65.02 | 57.24 | 41.83 | c | 39.96 | c | 53.95 | |||||
1974 | 31.37 | a | 38.06 | c | 48.20 | f | 52.07 | 65.07 | d | 75.94 | c | 75.81 | d | 74.79 | b | 69.50 | d | 59.31 | e | 46.06 | d | 35.02 | a | 56.64 | a | |
1975 | 34.38 | f | 36.83 | b | 41.52 | e | 45.04 | d | 56.23 | c | 67.54 | e | 75.57 | d | 72.87 | e | 70.13 | 54.87 | 45.12 | e | 39.81 | b | 55.05 | a | ||
1976 | 38.38 | b | 41.53 | 42.35 | e | 48.80 | e | 63.92 | g | 68.78 | c | 76.72 | b | 71.31 | g | 68.59 | c | 56.48 | 50.22 | e | 39.94 | 53.18 | b | |||
1977 | 35.81 | e | 44.40 | d | 39.37 | d | 54.92 | d | 53.56 | e | 72.58 | d | 76.65 | e | 76.17 | d | 67.44 | d | 60.79 | e | 47.69 | c | 42.06 | d | 55.95 | |
1978 | 38.02 | e | 40.54 | d | 48.50 | e | 50.72 | e | 57.13 | d | 69.80 | c | 75.62 | f | 73.87 | d | 65.25 | d | 61.67 | e | 43.15 | d | 32.20 | d | 52.81 | a |
1979 | 29.70 | d | 34.90 | c | 45.15 | d | 50.64 | e | 60.02 | d | 69.44 | d | 75.88 | e | 72.93 | d | 72.08 | f | 60.87 | d | 41.74 | c | 39.87 | a | 52.83 | a |
1980 | 38.29 | 43.00 | 40.84 | 52.10 | 56.14 | b | 67.85 | 75.65 | 72.32 | 66.60 | 56.37 | 46.02 | 43.55 | 54.89 | ||||||||||||
1981 | 41.37 | 42.04 | 43.69 | 55.43 | 60.53 | 73.15 | 77.35 | 74.87 | 67.05 | 53.58 | 47.98 | b | 40.53 | a | 56.47 | |||||||||||
1982 | 34.25 | g | 39.52 | b | 43.62 | f | 50.56 | c | 60.95 | c | 69.33 | c | 73.67 | b | 73.95 | b | 65.61 | h | 52.65 | e | 40.15 | d | 34.48 | f | 57.60 | d |
1983 | 37.42 | e | 41.22 | c | 43.34 | b | 45.29 | f | 59.24 | d | 68.24 | c | 74.43 | d | 73.46 | c | 69.46 | e | 56.57 | b | 43.30 | g | 37.10 | g | 58.15 | c |
1984 | 37.02 | g | 39.46 | d | 45.97 | a | 49.15 | d | 67.40 | a | 69.97 | 75.61 | d | 73.26 | b | 68.05 | a | 48.02 | f | 43.19 | c | 35.34 | c | 56.74 | b | |
1985 | 36.07 | c | 38.07 | g | 43.10 | f | 57.72 | a | 61.67 | d | 71.82 | 78.64 | f | 72.92 | e | 61.62 | b | 54.54 | d | 40.61 | c | 39.59 | b | 55.17 | c | |
1986 | 43.28 | b | 43.48 | b | 50.50 | 52.00 | a | 61.89 | 73.37 | 74.32 | a | 76.62 | b | 62.09 | b | 54.28 | b | 44.33 | a | 38.41 | c | 56.21 | ||||
1987 | 34.83 | a | 39.57 | a | 41.40 | a | 55.77 | b | 61.37 | a | 73.52 | a | 73.64 | b | 74.18 | a | 68.66 | a | 60.32 | a | 43.73 | b | 33.54 | c | 55.04 | |
1988 | 34.52 | d | 42.16 | 44.45 | 52.52 | a | 60.82 | c | 72.98 | 79.06 | 74.06 | 67.20 | b | 63.55 | a | 44.63 | 36.93 | a | 56.07 | |||||||
1989 | 32.54 | e | 37.12 | 50.03 | 59.47 | 61.68 | 71.38 | 78.66 | 72.40 | a | 68.59 | a | 57.44 | 48.20 | 39.76 | 56.44 | ||||||||||
1990 | 36.85 | 36.08 | b | 48.08 | 56.07 | 59.84 | 71.77 | 77.02 | a | 73.65 | a | 69.98 | b | 57.00 | a | 44.67 | a | 29.50 | 55.04 | |||||||
1991 | 34.90 | 46.24 | a | 40.33 | a | 49.93 | 57.65 | 65.45 | 77.52 | a | 75.21 | 69.57 | a | 61.70 | a | 44.35 | 36.32 | 54.93 | ||||||||
1992 | 35.57 | a | 43.15 | b | 46.18 | a | 57.15 | 63.55 | ----- | z | 73.85 | 76.47 | a | 69.45 | b | 60.89 | 42.59 | c | 32.50 | b | 54.67 | a | ||||
1993 | 36.33 | b | 37.56 | b | 49.08 | 53.42 | 62.24 | 68.22 | 73.13 | a | 73.97 | a | 68.10 | a | 57.43 | a | 41.46 | c | 37.26 | b | 54.85 | |||||
1994 | 40.53 | b | 35.92 | b | 50.27 | 53.50 | 61.10 | 75.12 | 78.90 | 77.92 | 70.63 | 55.06 | 37.55 | b | 38.18 | 56.22 | ||||||||||
1995 | 36.90 | b | 48.87 | b | 45.67 | b | 49.34 | a | 56.12 | a | 66.00 | b | 75.00 | b | 76.41 | b | 70.36 | a | 58.68 | c | 50.47 | a | 40.68 | a | 56.21 | |
1996 | 38.48 | 44.90 | c | 47.41 | b | 54.28 | c | 63.73 | a | 73.55 | b | 80.00 | 78.34 | b | 66.69 | a | 55.67 | d | 45.24 | a | 37.91 | c | 57.18 | |||
1997 | 35.62 | a | 40.92 | b | 50.13 | 50.20 | 66.56 | 69.02 | c | 74.52 | a | 74.80 | a | 68.48 | c | 57.67 | k | 47.38 | a | 36.63 | d | 55.84 | a | |||
1998 | 38.79 | c | 37.62 | g | 45.04 | f | 49.62 | f | 56.48 | e | 66.09 | c | 77.35 | d | 77.45 | c | 67.27 | f | 53.93 | d | 44.40 | f | 39.16 | f | 61.68 | f |
1999 | 40.87 | d | 42.25 | f | 48.60 | f | 47.87 | c | 60.74 | d | 68.57 | c | 74.37 | d | 74.72 | b | 68.81 | d | 61.25 | c | 51.66 | e | 39.82 | f | 60.99 | c |
2000 | 40.04 | g | 43.17 | i | 47.19 | g | 58.24 | e | 66.08 | e | 74.31 | c | 76.45 | b | 77.13 | d | 68.17 | a | 56.83 | e | 38.69 | d | 40.75 | g | 64.49 | d |
2001 | 36.60 | f | 40.57 | g | 47.94 | d | 51.74 | c | 68.67 | e | 73.88 | f | 76.52 | b | 76.86 | c | 71.62 | a | 61.58 | a | 48.98 | d | 33.93 | b | 59.76 | c |
2002 | 35.79 | g | 42.40 | b | 44.98 | d | 58.34 | e | 64.78 | f | 75.61 | c | 81.45 | a | 76.95 | c | 70.40 | j | 57.11 | i | 46.76 | i | 37.04 | e | 59.54 | e |
2003 | 45.04 | c | 40.83 | g | 46.90 | e | 50.70 | e | 64.36 | b | 73.70 | b | 82.45 | c | 77.07 | b | 71.56 | d | 64.26 | d | 42.73 | d | 37.64 | f | 61.88 | b |
2004 | 36.41 | d | 36.57 | b | 54.34 | c | 53.56 | c | 63.65 | d | 73.12 | e | 77.52 | a | 74.68 | a | 67.15 | c | 53.39 | h | 42.96 | e | 39.20 | c | 56.29 | a |
2005 | ----- | z | ----- | z | 46.02 | b | 51.98 | f | 63.27 | e | 68.55 | a | 80.88 | a | 73.96 | c | 68.31 | a | 58.78 | f | 48.29 | b | 39.48 | d | 61.10 | d |
2006 | 39.10 | e | 42.81 | b | 41.87 | d | 54.08 | e | 66.95 | c | 75.55 | b | 80.00 | c | ----- | z | ----- | z | 55.50 | g | 47.48 | d | 37.23 | e | 53.90 | c |
2007 | ----- | z | 42.67 | b | ----- | z | 57.06 | e | 65.89 | d | 74.03 | a | 80.04 | c | ----- | z | 69.16 | e | 56.79 | c | 50.96 | f | 33.88 | f | 63.66 | e |
2008 | 35.35 | g | 39.88 | c | 48.12 | g | 51.84 | e | 59.40 | g | 72.81 | c | 79.30 | f | 77.59 | h | 70.96 | c | 57.50 | e | 49.08 | e | 33.11 | m | 57.01 | f |
2009 | 41.50 | h | 39.30 | e | 46.00 | e | 51.95 | h | 68.00 | c | 68.40 | e | 79.54 | c | 76.60 | e | 71.70 | h | 54.63 | e | 47.98 | g | 32.80 | f | 61.78 | e |
2010 | 36.80 | f | 39.54 | d | 45.10 | g | 50.33 | d | 56.69 | g | 77.08 | x | 79.64 | b | 74.21 | 70.20 | j | 56.96 | e | 42.69 | a | ----- | z | 57.23 | f | |
2011 | ----- | z | 36.75 | d | 44.75 | g | 50.16 | e | 55.56 | e | 68.37 | 74.94 | 77.98 | 70.43 | 56.77 | 42.87 | 36.11 | 56.99 | b | |||||||
2012 | 39.73 | 40.03 | 46.56 | 53.95 | 65.34 | 73.57 | 76.40 | 77.79 | 70.37 | 59.05 | 48.13 | 37.53 | b | 57.37 | ||||||||||||
2013 | 33.96 | s | 39.27 | 50.07 | a | 56.41 | b | 62.74 | 74.78 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.12 | h | ||
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.15 | m | 41.98 | 41.98 | k | |
2015 | 43.68 | 47.05 | 52.60 | 53.32 | 59.16 | 75.43 | 75.24 | 77.45 | 72.37 | 61.97 | 43.93 | 37.61 | 58.32 | |||||||||||||
2016 | 36.84 | 46.07 | 52.45 | ----- | z | ----- | z | ----- | z | 79.56 | 75.73 | ----- | z | 61.37 | ----- | z | 39.63 | 55.95 | e | |||||||
2017 | 38.66 | 42.25 | 52.98 | 54.57 | 62.92 | 76.85 | 81.06 | 77.50 | ----- | z | 58.81 | 51.23 | d | ----- | z | 59.68 | b | |||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.39 | 40.33 | 45.48 | 52.18 | 61.05 | 70.60 | 76.74 | 74.91 | 67.58 | 57.30 | 44.51 | 37.04 | 55.06 | |||||||||||||
S.D. | 3.68 | 3.61 | 4.38 | 3.52 | 3.75 | 3.36 | 2.60 | 2.10 | 2.90 | 3.16 | 3.36 | 3.27 | 1.66 | |||||||||||||
SKEW | -0.00 | 0.03 | 0.08 | -0.16 | -0.03 | -0.14 | 0.10 | -0.76 | -0.99 | 0.07 | 0.11 | -0.37 | -0.49 | |||||||||||||
MAX | 45.04 | 48.87 | 54.34 | 59.47 | 68.67 | 76.85 | 82.45 | 78.34 | 72.37 | 64.26 | 51.66 | 43.55 | 58.32 | |||||||||||||
MIN | 28.95 | 33.16 | 37.35 | 44.30 | 53.56 | 62.62 | 71.81 | 67.62 | 58.12 | 49.17 | 37.55 | 29.50 | 51.29 | |||||||||||||
YRS | 45 | 51 | 49 | 54 | 53 | 54 | 54 | 54 | 50 | 53 | 53 | 48 | 27 |