YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | 47.87 | 58.77 | 63.61 | 60.29 | 52.63 | 40.87 | 30.80 | 20.94 | 46.97 | d | ||||||||
1968 | 23.10 | a | 24.00 | 32.45 | 38.85 | d | 47.19 | 59.23 | 63.26 | 62.29 | 53.63 | 43.90 | 32.50 | 19.87 | a | 41.69 | ||||||||||
1969 | 24.84 | 25.52 | a | 25.71 | 43.33 | 51.39 | 56.53 | 66.26 | 64.03 | 57.17 | 41.00 | 29.70 | 27.12 | e | 42.72 | |||||||||||
1970 | 18.74 | 26.36 | 27.65 | 38.97 | 50.87 | 57.47 | 65.19 | 64.26 | 55.08 | e | 37.52 | j | 29.83 | 25.23 | 41.79 | a | ||||||||||
1971 | 20.55 | 22.64 | 27.94 | 40.20 | 47.97 | 60.77 | 63.50 | a | 60.16 | 54.68 | k | 44.39 | 33.20 | 26.26 | 40.69 | a | ||||||||||
1972 | 19.74 | 22.85 | b | 34.55 | 43.13 | 50.13 | 59.93 | 62.06 | 60.58 | 55.17 | 44.83 | a | 25.00 | 19.65 | 41.47 | |||||||||||
1973 | 20.23 | 24.46 | 32.35 | 35.73 | 46.74 | 56.60 | 61.71 | 61.68 | 52.43 | 43.36 | c | 32.62 | a | 20.60 | a | 40.71 | ||||||||||
1974 | ----- | z | 27.32 | i | 36.71 | 41.57 | b | 53.63 | a | 58.69 | a | 65.21 | b | 59.39 | h | 50.04 | g | 46.37 | d | 34.28 | e | 23.25 | c | 44.96 | d | |
1975 | 22.81 | d | 18.53 | m | 29.24 | j | 37.00 | n | 48.36 | i | 57.89 | l | 63.16 | l | 63.59 | i | 52.89 | b | 44.42 | e | 31.69 | q | 24.83 | y | 40.04 | i |
1976 | 21.19 | j | 31.26 | f | 31.44 | o | 44.33 | l | 49.82 | i | 59.00 | d | 62.68 | l | 62.50 | u | 55.12 | m | 42.47 | p | ----- | z | 25.64 | t | 59.00 | k |
1977 | 17.45 | k | 29.40 | c | 33.75 | g | 43.07 | a | 54.84 | 63.37 | ----- | z | 65.43 | c | 60.37 | c | 46.04 | d | 32.38 | d | 28.27 | p | 49.36 | d | ||
1978 | 16.95 | l | 18.74 | i | 34.05 | i | 43.66 | a | 51.21 | b | 62.85 | j | 65.14 | x | 63.08 | g | 58.08 | d | 48.22 | h | 37.52 | i | 23.93 | p | 50.98 | i |
1979 | 16.48 | d | 26.68 | c | 35.71 | g | 43.48 | e | 46.40 | p | 59.56 | e | 64.33 | j | 60.41 | i | 57.43 | i | 46.38 | j | 28.61 | l | 26.22 | h | 36.55 | h |
1980 | 23.71 | c | 26.48 | f | 27.88 | n | 37.79 | f | 50.68 | f | 64.56 | e | 70.17 | g | 66.29 | c | 57.32 | h | 44.52 | d | 31.76 | e | 27.13 | h | 46.17 | g |
1981 | 25.88 | e | 30.00 | j | 37.41 | i | 49.19 | c | 50.58 | 63.20 | 67.39 | 62.73 | a | 55.60 | 43.67 | a | ----- | z | ----- | z | 52.28 | d | ||||
1982 | ----- | z | ----- | z | ----- | z | 40.32 | b | 50.65 | 56.21 | b | 64.71 | 64.87 | a | 55.25 | f | 40.60 | k | 30.45 | a | 25.44 | d | 47.52 | e | ||
1983 | 22.13 | h | 29.79 | n | 32.14 | b | 36.42 | f | 45.65 | h | 55.89 | k | 65.74 | 67.40 | f | ----- | z | 45.29 | g | 34.23 | d | ----- | z | 44.04 | i | |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | 19.45 | 18.73 | b | 29.13 | a | 37.76 | a | 51.65 | 62.87 | 63.17 | b | 62.83 | b | 55.37 | c | 43.87 | 31.24 | a | 26.55 | 41.88 | ||||||
1995 | 24.48 | 27.67 | a | 31.03 | a | 36.40 | 45.40 | a | 56.07 | 63.58 | 66.03 | 54.83 | 40.84 | 31.50 | 25.00 | b | 41.90 | |||||||||
1996 | 18.45 | 26.38 | 25.87 | 38.93 | a | 53.87 | 61.63 | 64.68 | 62.76 | b | 53.23 | 42.39 | 29.63 | 20.58 | 41.53 | |||||||||||
1997 | 19.90 | 24.15 | b | 30.86 | b | 34.67 | 49.13 | 58.57 | 64.87 | 63.16 | 57.97 | a | 43.32 | 28.67 | 21.26 | 41.38 | ||||||||||
1998 | 24.67 | a | 29.25 | 27.20 | a | 36.53 | 52.97 | 58.50 | 66.71 | 62.97 | 60.38 | a | 46.53 | a | 34.83 | 22.97 | b | 43.63 | ||||||||
1999 | 24.18 | c | 26.96 | 31.38 | b | 38.93 | b | 47.97 | b | 58.93 | b | 65.52 | 65.32 | 53.90 | 41.32 | 34.80 | 24.10 | a | 42.78 | |||||||
2000 | 23.62 | b | 29.03 | 33.19 | 41.10 | a | 52.29 | 60.24 | a | 65.97 | 67.83 | b | 57.23 | 46.00 | 26.23 | 19.40 | a | 43.51 | ||||||||
2001 | 20.55 | 25.41 | a | 30.33 | a | 44.20 | 50.61 | 60.61 | b | 68.50 | a | 64.67 | a | 55.27 | ----- | z | 37.47 | 24.87 | 43.86 | a | ||||||
2002 | 21.97 | b | 21.89 | 25.35 | 43.17 | 49.10 | 64.31 | a | 66.17 | a | 63.87 | a | 56.31 | a | 41.58 | 31.27 | 22.87 | 42.32 | ||||||||
2003 | 24.33 | a | 20.72 | c | 31.63 | a | 41.79 | a | 52.60 | a | 57.66 | a | 67.47 | a | 67.10 | a | 53.67 | 45.90 | 32.07 | a | 24.67 | a | 43.30 | |||
2004 | 21.87 | 22.31 | 38.50 | a | 41.14 | a | 52.20 | a | 58.47 | 63.45 | 60.30 | a | 56.46 | b | 44.17 | a | 31.19 | d | 23.77 | 42.82 | ||||||
2005 | 25.90 | 28.89 | 30.07 | b | 39.23 | 48.97 | 59.97 | 63.37 | a | 62.42 | 58.43 | 43.71 | 31.76 | a | 21.00 | 42.81 | ||||||||||
2006 | 23.55 | b | 21.32 | 32.50 | a | 44.20 | 53.36 | c | 62.76 | a | 66.48 | 63.87 | 51.47 | 43.40 | a | 30.83 | l | ----- | z | 46.29 | b | |||||
2007 | ----- | z | 29.90 | r | 35.46 | g | 34.18 | m | 47.53 | l | 54.81 | n | 62.77 | i | 64.86 | x | 54.53 | o | 42.57 | x | 30.00 | p | 20.55 | k | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.13 | 24.98 | 30.79 | 40.78 | 50.53 | 59.79 | 64.94 | 63.57 | 55.55 | 43.76 | 31.56 | 23.11 | 42.30 | |||||||||||||
S.D. | 2.60 | 3.06 | 3.46 | 3.29 | 2.46 | 2.46 | 1.76 | 2.14 | 2.45 | 1.78 | 2.71 | 2.45 | 0.87 | |||||||||||||
SKEW | -0.38 | -0.21 | 0.29 | 0.24 | -0.23 | 0.40 | 0.07 | 0.10 | 0.37 | -0.19 | -0.35 | -0.04 | -0.06 | |||||||||||||
MAX | 25.90 | 29.40 | 38.50 | 49.19 | 54.84 | 64.56 | 68.50 | 67.83 | 60.38 | 46.53 | 37.47 | 27.12 | 43.63 | |||||||||||||
MIN | 16.48 | 18.73 | 25.35 | 34.67 | 45.40 | 56.07 | 61.71 | 60.16 | 51.47 | 40.84 | 25.00 | 19.40 | 40.71 | |||||||||||||
YRS | 23 | 21 | 21 | 25 | 25 | 27 | 24 | 24 | 23 | 23 | 24 | 21 | 15 |