YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.07 | k | ----- | z |
1969 | 37.92 | 33.88 | 33.82 | 49.23 | 56.26 | 62.37 | 69.68 | 69.58 | 61.65 | 47.37 | 38.28 | 34.13 | 49.51 | |||||||||||||
1970 | 29.79 | 37.07 | 35.44 | 43.40 | 56.40 | 61.85 | 68.52 | 67.18 | 58.95 | 45.24 | 39.67 | 34.79 | 48.19 | |||||||||||||
1971 | 30.98 | 32.86 | 41.10 | 45.50 | 54.31 | 66.33 | 69.00 | 64.45 | 58.22 | 47.37 | 38.75 | 28.79 | 48.14 | |||||||||||||
1972 | 30.76 | 37.09 | 45.40 | 48.77 | 54.92 | 64.85 | 68.71 | 64.43 | a | 59.78 | a | 51.26 | b | 32.50 | 30.67 | a | 49.09 | |||||||||
1973 | 27.85 | 32.29 | 36.71 | 40.80 | 54.24 | 62.88 | 66.97 | 67.31 | 59.33 | 51.21 | 42.98 | 34.08 | a | 48.05 | ||||||||||||
1974 | 31.08 | 33.52 | 45.06 | 46.58 | 58.76 | 66.37 | 67.50 | 64.39 | 57.30 | 50.08 | 38.58 | 28.85 | 49.01 | |||||||||||||
1975 | 28.68 | 30.32 | 38.69 | 43.47 | a | 51.56 | 63.08 | 66.37 | 66.94 | 58.00 | 50.69 | 37.23 | 33.06 | 47.34 | ||||||||||||
1976 | 30.17 | a | 39.58 | c | 38.42 | 46.55 | 54.55 | 63.60 | 66.53 | 64.19 | 58.78 | 47.37 | 38.45 | b | 29.15 | a | 48.11 | |||||||||
1977 | 28.71 | 33.54 | 37.06 | g | 48.50 | c | 56.56 | 67.07 | 68.94 | 69.18 | 62.28 | 50.68 | 41.27 | 34.90 | 51.06 | a | ||||||||||
1978 | 28.09 | b | 29.33 | b | 41.03 | a | 47.30 | 54.21 | 66.02 | 71.16 | 65.65 | 59.80 | 52.77 | a | 39.75 | 26.12 | b | 48.43 | ||||||||
1979 | 23.18 | 31.28 | a | 39.39 | 45.65 | 52.90 | 60.77 | 67.76 | 65.34 | 61.55 | 52.84 | 33.47 | 33.42 | 47.29 | ||||||||||||
1980 | 33.93 | a | 37.50 | a | 38.29 | 44.17 | a | 53.48 | 67.73 | 72.22 | a | 67.44 | 61.70 | 47.77 | 38.15 | 40.08 | 50.21 | |||||||||
1981 | 34.24 | 37.61 | 38.63 | 51.52 | 55.63 | 68.52 | 69.50 | 65.73 | 61.05 | 50.00 | 43.50 | 36.95 | 51.07 | |||||||||||||
1982 | 32.32 | a | 34.07 | a | 41.00 | a | 48.47 | a | 54.87 | 64.88 | a | 69.40 | 68.23 | 61.23 | b | 49.00 | a | 38.93 | c | 28.63 | a | 49.25 | ||||
1983 | 32.42 | 34.50 | a | 39.64 | c | 42.39 | c | 52.66 | c | 62.55 | a | 68.81 | 67.68 | 64.35 | 52.52 | a | 40.86 | b | 30.90 | 49.11 | ||||||
1984 | 29.81 | 35.16 | a | 38.71 | 45.30 | 60.40 | 65.05 | 69.06 | 66.40 | 60.57 | a | 45.17 | a | 39.73 | 33.89 | 49.10 | ||||||||||
1985 | 28.73 | 32.29 | 41.32 | 49.70 | 56.39 | 65.23 | 68.11 | 68.48 | 59.03 | 51.74 | 41.57 | 34.13 | 49.73 | |||||||||||||
1986 | 38.40 | 37.30 | 44.08 | 50.02 | 55.77 | 63.95 | 67.18 | 67.82 | 59.63 | 48.84 | 37.18 | 30.55 | 50.06 | |||||||||||||
1987 | 29.48 | 32.77 | 37.50 | 46.27 | 54.27 | 64.28 | 68.25 | a | 65.94 | 59.95 | 53.58 | 40.13 | 30.53 | 48.58 | ||||||||||||
1988 | 28.19 | 38.57 | 39.50 | 47.58 | 55.16 | 64.58 | 68.34 | 66.05 | 58.47 | 53.37 | 41.13 | 30.98 | 49.33 | |||||||||||||
1989 | 32.06 | 34.05 | 45.66 | 52.33 | 60.02 | 65.58 | 68.52 | 66.45 | 60.92 | 50.87 | 41.75 | 30.65 | 50.74 | |||||||||||||
1990 | 31.68 | 33.02 | 41.63 | 50.80 | 63.65 | 74.50 | 72.37 | a | 69.29 | 63.35 | 55.26 | 46.13 | 36.85 | 53.21 | ||||||||||||
1991 | 35.66 | 38.43 | 40.13 | 48.08 | 57.45 | 64.47 | 66.66 | 66.44 | 59.58 | 51.73 | 36.65 | 31.74 | 49.75 | |||||||||||||
1992 | 28.15 | 36.57 | 41.69 | 51.73 | 55.60 | 63.72 | 68.34 | 66.73 | 62.37 | 53.94 | 34.23 | 29.84 | 49.41 | |||||||||||||
1993 | 34.85 | 37.18 | 42.06 | 50.03 | 56.10 | 66.12 | 71.37 | 67.47 | 61.38 | a | 50.45 | b | ----- | z | ----- | z | 53.70 | b | ||||||||
1994 | ----- | z | 35.85 | a | 42.90 | e | 49.46 | e | 57.55 | c | 68.88 | a | 70.79 | 70.08 | a | 61.72 | c | 49.19 | d | 40.39 | c | 37.00 | c | 53.07 | a | |
1995 | 32.77 | c | 42.96 | d | 42.26 | b | 45.69 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.88 | b | 34.78 | b | 39.53 | g |
1996 | 33.47 | a | 38.22 | 38.27 | 48.59 | a | 62.59 | b | 68.77 | d | 70.29 | 67.03 | a | 58.98 | 48.15 | a | 42.80 | b | 34.52 | c | 50.97 | |||||
1997 | 28.93 | c | 33.54 | c | 44.61 | d | 44.11 | c | 56.70 | f | 62.96 | e | 69.69 | m | 68.00 | k | 63.81 | i | 49.00 | k | 38.05 | s | 26.88 | s | 42.83 | g |
1998 | 33.38 | r | 34.22 | l | 39.04 | q | 44.08 | k | 57.54 | s | 65.78 | u | ----- | z | 67.35 | n | 64.55 | s | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.14 | w | 31.35 | d | 31.35 | k |
2000 | 36.35 | g | 38.27 | r | 41.46 | q | 45.36 | s | 57.06 | w | ----- | z | ----- | z | ----- | z | 62.55 | s | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | 51.35 | q | 57.24 | n | 67.42 | j | ----- | z | ----- | z | ----- | z | 51.12 | w | 43.43 | o | 36.21 | x | ----- | z |
2002 | 34.62 | r | 31.97 | l | 39.50 | n | 50.53 | m | 56.53 | m | 69.60 | t | 68.57 | x | 67.56 | m | 60.61 | k | 49.58 | k | 39.28 | e | 32.33 | k | 39.28 | k |
2003 | 38.06 | f | 33.76 | g | 40.22 | f | 48.25 | d | 59.33 | k | 64.54 | e | 71.92 | r | 67.47 | n | 61.44 | d | 55.42 | g | 42.00 | g | 35.00 | h | 58.08 | i |
2004 | 30.50 | l | 29.20 | g | 44.18 | i | 46.40 | d | 59.40 | e | 65.75 | d | 67.60 | b | 64.36 | i | 58.93 | b | 49.89 | d | 35.48 | g | 31.06 | d | 54.15 | e |
2005 | 37.28 | b | ----- | z | ----- | z | 47.65 | m | 58.24 | f | 66.32 | h | 70.91 | d | 68.40 | a | 61.96 | f | 48.92 | e | 42.52 | i | 33.31 | g | 56.38 | h |
2006 | 33.59 | d | 35.05 | h | 39.19 | j | 49.88 | i | ----- | z | 70.15 | f | 69.94 | g | 66.16 | b | 56.00 | a | 49.11 | c | 43.80 | g | 29.47 | 46.86 | g | |
2007 | 22.62 | e | 34.30 | c | 44.29 | e | 45.78 | e | 54.82 | f | 65.22 | n | ----- | z | 71.21 | b | 62.83 | d | 50.93 | d | 42.54 | c | 30.67 | d | 45.02 | c |
2008 | 26.92 | f | 35.20 | d | 38.54 | c | 44.52 | f | 51.00 | j | 68.13 | d | 65.87 | a | 67.21 | b | 59.73 | b | 48.13 | l | 40.30 | c | 32.22 | d | 50.90 | d |
2009 | 35.30 | a | 37.35 | a | 42.31 | d | 46.69 | c | 58.60 | g | ----- | z | ----- | z | ----- | z | 57.44 | d | 48.65 | d | ----- | z | ----- | z | 44.62 | f |
2010 | 30.43 | c | 29.71 | b | ----- | z | 48.95 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.07 | j |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | 58.92 | s | 68.93 | a | 73.13 | a | 70.88 | a | 60.79 | b | 50.77 | a | 38.80 | c | 25.72 | b | 55.57 | e |
2012 | 35.12 | b | 33.10 | c | 43.94 | f | 51.76 | a | 58.62 | c | ----- | z | ----- | z | ----- | z | ----- | z | 50.39 | ----- | z | ----- | z | 45.80 | g | |
2013 | 27.73 | ----- | z | ----- | z | ----- | z | 57.71 | 71.18 | 67.29 | ----- | z | ----- | z | 46.98 | 37.60 | 31.29 | 48.54 | e | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.27 | 35.00 | 40.58 | 47.43 | 56.40 | 65.62 | 68.91 | 67.18 | 60.21 | 50.12 | 39.61 | 32.11 | 49.32 | |||||||||||||
S.D. | 3.66 | 3.00 | 2.94 | 2.87 | 2.82 | 2.85 | 1.84 | 1.82 | 1.85 | 2.38 | 3.01 | 3.15 | 1.32 | |||||||||||||
SKEW | -0.14 | 0.27 | -0.11 | -0.26 | 0.77 | 0.98 | 0.54 | 0.38 | 0.00 | -0.06 | -0.25 | 0.28 | 0.94 | |||||||||||||
MAX | 38.40 | 42.96 | 45.66 | 52.33 | 63.65 | 74.50 | 73.13 | 71.21 | 64.35 | 55.26 | 46.13 | 40.08 | 53.21 | |||||||||||||
MIN | 22.62 | 29.33 | 33.82 | 40.80 | 51.56 | 60.77 | 65.87 | 64.19 | 56.00 | 45.17 | 32.50 | 25.72 | 47.29 | |||||||||||||
YRS | 35 | 34 | 31 | 33 | 30 | 33 | 32 | 32 | 34 | 35 | 32 | 34 | 24 |