YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1970 | ----- | z | ----- | z | 32.19 | 38.04 | b | 51.29 | 55.22 | 64.29 | b | 64.60 | e | 54.05 | a | 41.34 | b | 32.95 | h | 27.65 | d | 47.63 | c | |||
1971 | 22.91 | c | 23.43 | f | 33.43 | a | 41.20 | c | 47.54 | c | 59.86 | a | 63.87 | e | 59.65 | r | ----- | z | ----- | z | ----- | z | ----- | z | 44.80 | f |
1972 | ----- | z | 25.31 | c | 36.05 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.38 | j | 25.69 | j | 25.31 | k |
1973 | 24.17 | j | 27.93 | h | 32.65 | g | 34.26 | g | 46.98 | b | 57.02 | e | 63.21 | 62.73 | c | 54.90 | e | 49.71 | c | 36.57 | h | 25.58 | e | 51.45 | e | |
1974 | 22.95 | k | 23.03 | l | 35.70 | i | 39.45 | h | 51.78 | f | 61.71 | d | 62.83 | e | 58.68 | c | 55.35 | f | 48.09 | d | 32.79 | d | 21.29 | g | 52.82 | g |
1975 | 20.21 | j | 23.98 | h | 28.38 | j | 33.89 | g | 46.58 | e | 56.25 | d | 61.19 | e | 59.90 | e | 55.23 | j | 46.61 | i | 32.21 | i | 26.44 | d | 50.07 | g |
1976 | 21.70 | k | 29.29 | h | 29.38 | g | 40.46 | f | 47.65 | k | 56.23 | j | 63.33 | e | 59.46 | d | 53.80 | g | 42.77 | g | 36.83 | f | 25.81 | b | 49.53 | i |
1977 | 20.71 | e | 28.24 | i | 27.62 | f | 40.61 | h | 46.42 | g | 61.30 | e | 62.39 | d | 62.45 | c | 56.14 | h | 47.45 | b | 35.02 | e | 28.25 | k | 48.22 | f |
1978 | 23.37 | e | 25.74 | g | 32.80 | k | 40.57 | h | 43.27 | e | 57.26 | i | 64.17 | a | 60.61 | c | 52.83 | c | 47.22 | b | 33.32 | e | 17.72 | f | 46.40 | e |
1979 | 14.12 | j | 20.70 | h | 28.13 | d | 34.75 | d | 43.91 | d | 52.89 | g | 60.71 | e | 58.21 | b | 55.34 | e | 46.72 | h | 24.81 | d | 25.26 | j | 43.69 | e |
1980 | 22.73 | k | 24.52 | c | 24.00 | n | 32.47 | l | 43.45 | k | 56.67 | j | 63.42 | k | 58.43 | i | 53.10 | j | 41.21 | j | 34.47 | m | 31.39 | m | 24.52 | k |
1981 | 28.41 | h | 25.43 | m | 28.00 | n | 40.67 | l | 43.50 | m | 57.48 | i | 61.87 | h | 58.22 | h | 53.10 | e | 39.77 | g | 35.61 | h | 25.37 | l | 53.10 | k |
1982 | 17.06 | m | 22.94 | d | 28.02 | a | 36.00 | h | 44.12 | g | 54.84 | h | 60.33 | d | 58.82 | l | 51.74 | g | 40.80 | k | 30.20 | j | 20.75 | k | 37.10 | i |
1983 | 23.64 | i | 24.66 | 28.59 | b | 32.38 | d | 41.66 | l | 52.14 | l | 58.41 | n | 60.14 | f | 56.08 | l | 43.88 | f | 31.12 | i | 20.76 | l | 28.54 | i | |
1984 | 19.25 | i | 22.61 | b | 28.05 | 34.50 | 49.22 | f | 53.08 | f | 61.02 | g | 59.19 | g | 54.17 | g | 36.45 | j | 30.52 | j | 25.38 | k | 28.39 | i | ||
1985 | 20.90 | g | 21.02 | a | 29.77 | a | 39.38 | 46.24 | f | 55.12 | m | 61.73 | i | 60.06 | g | 48.58 | j | 42.02 | j | 29.16 | k | 23.43 | c | 28.40 | h | |
1986 | 29.12 | f | 27.81 | a | 35.35 | 38.27 | 46.52 | c | 55.37 | g | 59.05 | b | 60.42 | a | 47.55 | i | 39.74 | f | 31.26 | g | 23.42 | g | 44.57 | f | ||
1987 | 21.12 | g | 25.20 | h | 27.79 | e | 39.10 | f | 44.68 | c | 57.57 | b | 60.62 | c | 57.94 | e | 53.24 | g | 46.60 | g | 30.54 | f | 20.42 | f | 49.72 | g |
1988 | 16.02 | h | 25.48 | e | 29.83 | a | 42.79 | b | 50.50 | d | 62.22 | a | 64.65 | a | 62.63 | 52.36 | a | 47.79 | c | 29.55 | b | 22.85 | h | 46.78 | b | |
1989 | 21.63 | l | 25.29 | d | 37.68 | i | 46.61 | c | 55.68 | i | 63.36 | i | 67.41 | c | 62.52 | b | 55.64 | e | 44.63 | 36.81 | f | 25.88 | e | 46.85 | e | |
1990 | 22.83 | h | 27.13 | a | 35.66 | b | 43.52 | b | 47.90 | 62.84 | a | 62.69 | 61.74 | b | 58.14 | b | 45.44 | d | 36.00 | f | 21.96 | g | 49.45 | c | ||
1991 | 22.46 | h | 31.16 | f | 32.00 | 40.30 | b | 50.32 | a | 57.79 | d | 63.37 | 63.55 | b | 55.89 | b | 49.00 | d | 31.00 | l | 25.30 | h | 51.53 | d | ||
1992 | 24.93 | j | 30.28 | 36.23 | 45.70 | 51.50 | 56.60 | 61.48 | 61.21 | 57.50 | 48.97 | b | 27.00 | a | 23.39 | c | 45.44 | a | ||||||||
1993 | 27.70 | i | 27.27 | d | 35.26 | 42.17 | c | 51.25 | a | 58.27 | 64.23 | 62.33 | a | 54.79 | a | 45.28 | a | 30.91 | c | 27.91 | o | 47.18 | b | |||
1994 | 23.84 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | 46.36 | w | 47.52 | a | 58.23 | 64.82 | 65.97 | 56.26 | a | 46.69 | b | 38.70 | c | 29.05 | 50.91 | d | ||||
1996 | 25.07 | a | 31.27 | a | 34.67 | b | 43.88 | 57.13 | 63.93 | a | 67.45 | 64.52 | b | 52.86 | b | 46.77 | c | 35.17 | d | 23.61 | d | 45.53 | ||||
1997 | 21.27 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.43 | x | 59.22 | 45.70 | c | 33.36 | a | 24.47 | a | 40.69 | h | |
1998 | 26.29 | 26.27 | b | 33.60 | f | 37.31 | n | 51.96 | h | 62.28 | e | 67.46 | e | 64.33 | d | 60.57 | b | 49.64 | q | 35.20 | b | 29.21 | e | 46.45 | d | |
1999 | 28.67 | h | 32.65 | h | 42.61 | q | 38.13 | d | 47.43 | a | 57.93 | a | 63.41 | b | 61.71 | b | 55.22 | c | 48.33 | e | 42.17 | c | 27.88 | b | 49.13 | c |
2000 | 28.20 | c | 32.46 | c | 35.98 | a | 45.96 | b | 55.77 | 62.93 | 66.94 | 66.52 | 60.50 | 46.40 | 28.05 | 27.33 | a | 46.42 | ||||||||
2001 | 24.28 | b | 29.92 | b | 32.67 | g | 44.45 | i | 53.60 | b | 62.59 | c | 67.66 | i | 63.20 | c | 60.50 | a | 48.92 | a | 38.50 | b | 25.05 | a | 45.17 | c |
2002 | 24.82 | a | 25.66 | 32.75 | a | 47.12 | a | 54.11 | 66.45 | a | 65.73 | a | 65.58 | a | 55.95 | 44.26 | 34.07 | b | 24.81 | e | 45.11 | |||||
2003 | 31.35 | d | 27.35 | b | 32.60 | a | 41.46 | e | 52.77 | 59.77 | 69.84 | 64.39 | 56.53 | a | 50.52 | c | 33.72 | c | 27.40 | b | 45.64 | |||||
2004 | 25.52 | b | 23.00 | a | 40.58 | 41.67 | a | 53.24 | 60.25 | b | 65.68 | a | 62.34 | b | 54.18 | b | 43.00 | e | 33.75 | v | ----- | z | 46.95 | b | ||
2005 | 29.13 | l | 27.13 | a | 31.16 | 39.27 | b | 51.86 | b | 56.08 | 66.92 | m | ----- | z | ----- | z | 45.19 | d | 35.24 | c | 25.43 | i | 40.85 | e | ||
2006 | 24.88 | e | 28.48 | a | 33.70 | c | 43.27 | f | 53.21 | g | 62.86 | a | 64.39 | c | 60.12 | b | 49.10 | d | 42.05 | c | 34.20 | g | 23.85 | n | 45.70 | d |
2007 | 21.42 | l | 25.93 | n | 35.81 | m | 41.86 | i | 50.08 | f | 60.81 | d | 65.81 | 65.97 | b | 56.39 | g | 45.43 | j | 38.62 | e | 23.25 | k | 57.80 | h | |
2008 | 14.12 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.22 | 26.47 | 32.46 | 40.86 | 49.80 | 60.03 | 63.98 | 62.36 | 55.70 | 46.49 | 33.68 | 26.06 | 45.67 | |||||||||||||
S.D. | 2.79 | 2.95 | 3.44 | 4.11 | 3.83 | 2.93 | 2.51 | 2.42 | 2.90 | 2.45 | 4.44 | 1.89 | 0.55 | |||||||||||||
SKEW | 0.71 | 0.22 | 0.34 | -0.33 | 0.06 | 0.17 | 0.20 | -0.09 | 0.00 | -0.43 | -0.20 | 0.13 | 0.54 | |||||||||||||
MAX | 31.35 | 32.46 | 40.58 | 47.12 | 57.13 | 66.45 | 69.84 | 66.52 | 60.57 | 50.52 | 42.17 | 29.21 | 46.42 | |||||||||||||
MIN | 20.71 | 21.02 | 27.79 | 32.38 | 43.27 | 55.22 | 59.05 | 57.94 | 49.10 | 41.34 | 24.81 | 23.39 | 45.11 | |||||||||||||
YRS | 11 | 21 | 21 | 20 | 22 | 24 | 28 | 27 | 22 | 22 | 18 | 16 | 4 |