YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.40 | 21.35 | 28.38 | j | ||
1968 | 25.77 | 35.07 | 41.32 | 42.30 | 52.61 | 62.73 | 75.68 | 65.42 | 61.26 | c | 50.42 | 32.33 | 22.53 | a | 47.29 | |||||||||||
1969 | 25.30 | a | 30.93 | 36.45 | 50.31 | a | 60.55 | 60.60 | 72.68 | 78.19 | 67.07 | 42.19 | d | 35.77 | 27.29 | 48.94 | ||||||||||
1970 | 24.45 | 35.96 | 33.19 | 36.33 | 54.52 | 66.37 | 73.84 | 77.58 | 55.80 | 45.60 | a | 34.43 | 23.65 | 46.81 | ||||||||||||
1971 | 23.90 | 28.89 | 32.84 | 43.33 | 55.68 | 64.07 | 72.32 | 78.19 | 58.07 | a | 46.81 | 34.33 | 21.06 | 46.63 | ||||||||||||
1972 | 21.10 | 29.10 | 39.68 | 44.27 | 54.90 | 65.43 | 70.03 | 72.32 | 56.10 | 50.42 | 32.13 | 20.52 | 46.33 | |||||||||||||
1973 | 25.30 | a | 35.71 | 37.45 | 40.20 | ----- | z | ----- | z | 73.81 | 73.84 | 60.77 | 52.06 | 30.77 | 27.23 | 45.71 | b | |||||||||
1974 | 21.42 | 29.32 | 34.00 | 47.10 | 50.81 | 70.03 | 76.60 | a | 69.03 | 66.53 | 54.71 | 34.60 | 24.23 | 48.20 | ||||||||||||
1975 | 20.58 | 27.96 | 32.06 | 38.13 | 50.40 | a | 59.10 | 75.90 | a | 67.65 | 65.73 | 48.68 | 31.70 | 28.00 | 45.49 | |||||||||||
1976 | 24.81 | 29.31 | 32.87 | a | 46.00 | a | 59.52 | 63.37 | 76.03 | 69.52 | 64.93 | 50.16 | 36.57 | 25.23 | 48.19 | |||||||||||
1977 | 23.48 | 36.00 | 32.65 | 51.83 | 53.55 | 69.13 | 72.32 | 67.26 | 61.03 | 52.23 | 32.33 | 25.52 | 48.11 | |||||||||||||
1978 | 25.87 | a | 29.32 | 41.23 | 45.37 | 51.57 | a | 65.60 | 71.71 | 70.61 | 61.15 | d | 53.65 | e | 29.46 | d | 13.40 | f | 49.59 | a | ||||||
1979 | 13.57 | c | 26.37 | a | 36.39 | 42.34 | a | 53.58 | 65.54 | b | 75.45 | 70.42 | 69.07 | ----- | z | ----- | z | 27.62 | b | 48.03 | b | |||||
1980 | 15.00 | v | 30.97 | 32.84 | f | 56.43 | p | 54.87 | a | ----- | z | ----- | z | 67.38 | b | ----- | z | 50.00 | ----- | z | ----- | z | 50.80 | h | ||
1981 | 26.13 | a | ----- | z | 41.67 | a | 45.43 | i | 52.00 | b | 60.97 | a | 74.75 | c | 76.65 | h | 68.61 | b | 44.48 | ----- | z | 27.19 | d | 49.47 | d | |
1982 | 20.74 | d | 24.88 | b | 34.10 | b | 38.67 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.60 | h |
1983 | ----- | z | ----- | z | 36.77 | 40.87 | 49.77 | 60.37 | 70.10 | 73.13 | 60.17 | 47.87 | 30.97 | 18.36 | i | 52.22 | c | |||||||||
1984 | 23.13 | 30.69 | 34.86 | b | 41.37 | c | 52.43 | h | 60.63 | 73.00 | 71.32 | 55.10 | 41.74 | 31.08 | f | 19.80 | f | 47.98 | c | |||||||
1985 | 22.81 | 21.44 | c | 34.13 | 47.23 | 57.84 | 64.83 | 74.84 | 68.45 | 52.00 | 45.45 | 25.90 | a | 21.77 | a | 44.72 | ||||||||||
1986 | 28.74 | 30.14 | 43.52 | 43.97 | 54.26 | 71.30 | 68.90 | 73.58 | 52.53 | 51.10 | 30.90 | 23.23 | 47.68 | |||||||||||||
1987 | 23.45 | 33.14 | 36.90 | 54.47 | 59.87 | 69.07 | o | 67.54 | e | 70.88 | f | 66.10 | i | 56.03 | 42.17 | l | 28.36 | q | 47.34 | e | ||||||
1988 | 25.56 | v | 34.00 | u | 35.40 | f | 47.73 | 58.06 | 74.97 | 80.04 | f | 76.39 | c | 62.39 | b | 58.26 | 30.48 | a | 23.22 | m | 58.33 | e | ||||
1989 | 26.00 | r | 29.12 | t | 37.07 | q | 48.91 | s | 56.10 | j | 64.27 | 79.10 | 70.65 | 63.93 | 46.58 | 32.83 | a | 22.73 | a | 54.30 | e | |||||
1990 | 25.60 | a | 28.96 | 40.74 | 48.30 | 50.84 | 65.10 | 75.35 | 73.61 | 71.13 | 45.00 | 35.37 | 15.17 | a | 47.93 | |||||||||||
1991 | 22.13 | 38.18 | 36.50 | c | 41.04 | d | 52.33 | d | 66.33 | l | ----- | z | 77.42 | l | 64.82 | b | 50.93 | b | 29.20 | o | 24.21 | c | 41.27 | d | ||
1992 | 27.97 | 38.34 | 45.39 | 48.17 | 61.39 | 64.93 | 66.74 | 73.16 | 60.53 | 53.48 | b | 28.89 | c | 20.94 | 49.16 | |||||||||||
1993 | 23.58 | 30.43 | 41.68 | 43.80 | 60.06 | 61.03 | 63.90 | 67.45 | 61.57 | 49.19 | 30.69 | a | 25.55 | b | 46.58 | |||||||||||
1994 | 27.90 | 26.81 | b | 41.45 | b | 47.80 | 60.32 | 68.07 | 74.71 | 76.94 | 69.07 | a | 49.93 | q | 27.41 | c | 26.62 | b | 49.74 | a | ||||||
1995 | 24.97 | a | 35.04 | b | 35.67 | a | 42.55 | a | 51.74 | 62.20 | 71.77 | 75.03 | 65.54 | f | 43.94 | 35.13 | 25.29 | 45.76 | a | |||||||
1996 | 23.39 | 29.76 | 35.87 | 44.50 | 46.74 | 69.37 | 77.77 | 75.97 | 60.38 | a | 49.55 | 34.03 | 23.81 | 47.59 | ||||||||||||
1997 | ----- | z | 28.89 | 36.94 | 39.70 | 56.83 | a | 67.17 | 70.42 | 70.97 | 63.00 | 44.77 | 32.93 | 23.29 | 48.63 | a | ||||||||||
1998 | 27.61 | 32.14 | 37.55 | 47.43 | 59.77 | a | 56.13 | 78.58 | 74.77 | a | 65.77 | d | 49.77 | a | 33.00 | b | 21.26 | 48.65 | ||||||||
1999 | 25.10 | 29.07 | 39.52 | 42.47 | 51.45 | 62.21 | b | 73.17 | b | 71.60 | a | 59.17 | 52.53 | a | 40.67 | 22.03 | 47.42 | |||||||||
2000 | 24.74 | 32.86 | 38.71 | 48.37 | c | 53.53 | a | 65.43 | 76.77 | 74.39 | 61.63 | 47.13 | a | 23.83 | 22.87 | 47.52 | ||||||||||
2001 | 24.26 | 26.46 | 39.81 | 44.00 | 59.45 | 66.59 | a | 74.83 | a | 76.42 | 67.37 | 46.87 | 35.30 | 21.16 | 48.54 | |||||||||||
2002 | 21.81 | 28.36 | 30.19 | 42.37 | 52.52 | 65.70 | 77.00 | 68.71 | 61.20 | 42.26 | 30.80 | 25.23 | 45.51 | |||||||||||||
2003 | 27.47 | a | 26.00 | 34.71 | 45.27 | 54.87 | a | 62.53 | 78.90 | 76.77 | a | 60.33 | 53.04 | c | 25.87 | 25.00 | 47.56 | |||||||||
2004 | 22.97 | a | 28.72 | 41.36 | c | 48.29 | f | 50.52 | d | 61.23 | 70.50 | a | 66.52 | 57.73 | d | 45.38 | e | 31.41 | a | 26.16 | 45.68 | a | ||||
2005 | 26.42 | 32.11 | 35.68 | c | 44.08 | d | 51.84 | 59.67 | 74.74 | 70.47 | a | 58.03 | 49.39 | 28.73 | 20.10 | 45.94 | ||||||||||
2006 | 24.80 | a | 24.64 | 34.65 | 45.44 | c | 57.34 | b | 68.03 | 77.33 | a | 71.88 | e | 67.76 | m | 46.83 | a | 34.23 | 26.70 | a | 46.54 | a | ||||
2007 | 24.16 | 31.14 | 43.61 | 48.07 | c | 60.58 | 70.46 | b | 82.16 | 75.00 | d | 60.71 | f | 48.10 | 36.67 | 22.20 | a | 49.29 | a | |||||||
2008 | 20.94 | 30.59 | 33.03 | 41.57 | 51.70 | a | 63.07 | 76.61 | 75.13 | 63.41 | a | 48.31 | b | 35.43 | 20.81 | 46.72 | ||||||||||
2009 | 27.77 | 32.96 | b | 32.29 | 41.17 | 56.48 | 56.05 | h | 71.48 | 69.60 | a | 69.38 | a | 38.59 | b | 34.76 | a | 17.52 | 44.73 | a | ||||||
2010 | 26.71 | 28.14 | 39.97 | 44.55 | a | 46.68 | 60.17 | 72.03 | 69.65 | 65.50 | 52.97 | 30.33 | 25.81 | 46.88 | ||||||||||||
2011 | 22.97 | 23.79 | 34.00 | 37.60 | 45.03 | 60.73 | 74.23 | 73.39 | 67.67 | 48.93 | a | 31.23 | 23.48 | 45.25 | ||||||||||||
2012 | 27.19 | 27.07 | 39.52 | 48.47 | 52.71 | 68.10 | a | 76.06 | 74.84 | 66.80 | 46.90 | 35.77 | 24.03 | 48.96 | ||||||||||||
2013 | 23.77 | 26.96 | 36.37 | a | 39.67 | 55.00 | 68.03 | 77.19 | e | 75.36 | q | ----- | z | ----- | z | ----- | z | ----- | z | 46.71 | e | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.26 | 30.06 | 37.15 | 44.24 | 54.38 | 64.63 | 73.97 | 72.27 | 62.48 | 48.63 | 32.39 | 23.55 | 47.25 | |||||||||||||
S.D. | 2.76 | 3.78 | 3.66 | 3.94 | 4.11 | 3.91 | 3.61 | 3.49 | 4.73 | 4.08 | 3.39 | 2.82 | 1.22 | |||||||||||||
SKEW | -1.29 | 0.26 | 0.28 | 0.25 | -0.08 | 0.30 | -0.48 | -0.07 | -0.27 | -0.05 | -0.34 | -0.65 | -0.33 | |||||||||||||
MAX | 28.74 | 38.34 | 45.39 | 54.47 | 61.39 | 74.97 | 82.16 | 78.19 | 71.13 | 58.26 | 40.67 | 28.00 | 49.16 | |||||||||||||
MIN | 13.57 | 21.44 | 30.19 | 36.33 | 45.03 | 56.13 | 63.90 | 65.42 | 52.00 | 38.59 | 23.83 | 15.17 | 44.72 | |||||||||||||
YRS | 41 | 42 | 43 | 42 | 42 | 40 | 42 | 41 | 39 | 42 | 39 | 39 | 26 |