YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.15 | c | 32.87 | a | 34.51 | j |
1956 | 28.87 | a | 23.88 | c | 37.19 | 43.52 | g | 52.23 | a | 58.21 | a | 65.33 | a | 62.83 | b | 54.42 | 44.30 | a | 34.69 | a | 30.72 | a | 44.79 | a | ||
1957 | 17.71 | 30.09 | a | ----- | z | 45.05 | 53.16 | 60.97 | a | 64.55 | 62.07 | a | 57.15 | 44.77 | i | 35.00 | 32.76 | 45.85 | b | |||||||
1958 | 29.95 | 39.66 | 34.68 | 44.68 | 60.05 | 60.85 | 66.02 | 68.69 | 55.95 | a | 49.04 | f | 39.40 | a | 35.72 | a | 48.69 | a | ||||||||
1959 | 34.98 | 32.18 | 38.77 | 47.41 | a | 48.35 | 61.80 | 68.82 | 65.10 | 57.38 | d | 49.27 | 36.32 | 27.30 | a | 47.31 | ||||||||||
1960 | 24.48 | 32.17 | 39.59 | d | 45.43 | c | 48.16 | i | 61.42 | 71.38 | c | 62.85 | 58.53 | 46.94 | 35.23 | 27.93 | j | 47.80 | b | |||||||
1961 | 32.18 | i | 37.82 | 38.57 | a | 44.10 | 50.48 | f | 65.69 | a | 70.12 | a | 69.63 | 53.26 | c | 44.38 | f | 33.48 | b | 28.09 | b | 48.97 | c | |||
1962 | 20.38 | a | 30.26 | a | 36.67 | b | 48.72 | a | 49.10 | 59.78 | 63.83 | b | 61.72 | d | 60.39 | k | 47.53 | b | 40.09 | a | 36.05 | k | 45.81 | b | ||
1963 | 24.50 | d | 43.64 | j | 37.94 | 40.98 | d | 54.00 | 58.36 | a | 63.13 | a | 64.67 | a | 61.62 | b | 51.40 | g | 38.52 | b | 26.00 | n | 49.30 | c | ||
1964 | 27.86 | c | 31.19 | 34.50 | 42.12 | 49.66 | b | 57.72 | 67.08 | ----- | z | ----- | z | 46.25 | s | 34.39 | b | 31.10 | p | 43.06 | d | |||||
1965 | 31.70 | d | ----- | z | ----- | z | ----- | z | 49.98 | b | 59.23 | 64.88 | c | 62.85 | 52.41 | a | 51.69 | j | 39.62 | b | 28.93 | c | 48.70 | d | ||
1966 | 27.60 | a | 29.96 | 38.87 | 44.40 | j | 56.36 | b | 58.02 | b | 64.81 | 64.69 | 60.25 | d | 45.82 | f | 38.48 | d | 30.87 | a | 46.99 | b | ||||
1967 | 33.03 | 35.56 | a | 36.23 | 38.23 | h | 53.66 | c | 59.48 | a | 69.37 | a | 68.38 | b | 60.70 | b | 46.30 | h | 38.32 | 27.11 | 48.18 | b | ||||
1968 | 28.79 | e | 38.66 | 40.43 | d | 42.85 | j | 53.91 | b | 63.02 | c | 71.39 | 64.68 | c | 58.83 | 48.57 | j | 39.66 | a | 31.60 | a | 49.10 | b | |||
1969 | 30.27 | a | 29.17 | b | 35.90 | 48.15 | g | 58.14 | b | 62.60 | 67.73 | 66.61 | 60.92 | e | 44.10 | f | 39.09 | c | 33.19 | 48.36 | b | |||||
1970 | 32.97 | 38.40 | b | 39.82 | 41.11 | h | 54.81 | 63.59 | a | 69.26 | 67.37 | 55.00 | 48.11 | l | 39.62 | 27.55 | 48.84 | b | ||||||||
1971 | 33.63 | 35.88 | 35.94 | 43.08 | f | 55.57 | d | 59.31 | a | 68.22 | d | 69.55 | 54.91 | b | 40.00 | k | 38.37 | 29.12 | a | 48.05 | b | |||||
1972 | 27.22 | h | 34.62 | 44.87 | e | 44.77 | f | 56.07 | d | 63.15 | f | 67.54 | f | 67.21 | 52.40 | 45.90 | a | 35.42 | d | 17.78 | d | 44.28 | d | |||
1973 | 25.97 | a | 32.84 | 35.75 | a | 40.26 | c | 55.31 | d | 59.69 | f | 67.83 | b | 65.71 | 57.21 | d | 48.29 | 36.74 | e | ----- | z | 46.59 | b | |||
1974 | 28.12 | c | 33.70 | c | 37.53 | b | 45.16 | e | 50.33 | g | 63.50 | f | 70.89 | q | 62.74 | b | 60.02 | f | 47.33 | g | 37.04 | c | ----- | z | 40.72 | f |
1975 | 23.75 | k | 30.84 | c | 32.91 | i | 37.94 | d | 50.27 | i | 57.75 | l | 65.17 | v | 61.95 | l | 58.45 | j | 43.50 | r | 28.73 | q | 35.29 | q | 34.39 | j |
1976 | 31.31 | o | 31.50 | j | 31.48 | h | 43.45 | t | 52.14 | f | 54.06 | l | 67.26 | h | 59.92 | s | 56.33 | o | 45.11 | m | 39.25 | v | 26.97 | p | ----- | z |
1977 | 21.05 | i | 30.67 | e | 33.67 | d | 48.09 | c | 44.24 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.48 | i |
1978 | 33.70 | f | 34.58 | b | 43.94 | 43.50 | a | 50.08 | 58.65 | 67.67 | g | 62.19 | d | 53.85 | d | 47.84 | b | 31.79 | a | 24.18 | a | 45.06 | b | |||
1979 | 18.21 | g | 34.35 | a | 40.89 | 43.69 | c | 53.41 | d | 61.46 | d | 68.52 | d | 67.88 | o | 60.38 | f | 47.75 | g | 31.74 | c | 33.00 | a | 45.88 | d | |
1980 | 29.06 | e | 38.38 | 38.60 | a | 47.82 | b | 51.98 | 54.39 | k | 67.35 | 62.18 | c | 58.52 | c | 47.05 | 38.95 | b | 29.48 | d | 46.31 | a | ||||
1981 | 31.88 | e | 37.06 | j | 39.20 | a | 47.11 | b | 51.75 | g | 58.02 | a | 64.78 | a | 67.48 | b | 56.13 | c | 44.96 | e | 38.21 | b | 34.33 | a | 48.21 | b |
1982 | 22.96 | f | 35.91 | l | 37.61 | 41.47 | a | 51.07 | d | 59.61 | b | 64.19 | b | 65.45 | a | 53.30 | e | 44.75 | i | 31.44 | c | 27.61 | 47.97 | c | ||
1983 | 33.21 | b | 36.87 | b | 40.74 | 41.90 | d | 50.85 | d | 57.62 | j | 63.79 | n | ----- | z | 55.13 | d | ----- | z | ----- | z | ----- | z | 43.12 | f | |
1984 | ----- | z | ----- | z | 40.37 | e | 43.00 | f | 52.20 | i | 49.54 | r | 67.17 | p | 66.54 | c | 52.89 | h | 41.48 | f | ----- | z | ----- | z | 53.45 | j |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | 46.36 | p | 62.00 | r | 62.70 | o | 60.58 | k | ----- | z | 50.83 | d | 47.94 | g | 41.17 | g | 28.07 | q | 50.83 | k |
1987 | 23.83 | g | 32.09 | k | 39.07 | i | 50.85 | g | 56.44 | w | ----- | 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 | 50.29 | d | 52.27 | e | 63.02 | d | 69.72 | a | 62.59 | b | 57.43 | c | 46.85 | d | 37.96 | d | 30.37 | d | 52.28 | c |
1990 | 33.59 | i | 31.04 | b | 39.74 | b | 51.98 | h | 48.04 | c | 61.40 | e | 69.37 | e | 66.88 | e | 60.61 | c | 46.65 | h | 38.44 | f | 22.84 | b | 49.99 | d |
1991 | 27.45 | a | 38.87 | a | 36.61 | c | 43.66 | b | 48.86 | c | 55.63 | c | 67.69 | b | ----- | z | 61.46 | c | 49.34 | b | 39.75 | d | 30.81 | g | 46.93 | b |
1992 | 30.94 | d | 41.00 | a | 44.47 | b | 49.46 | c | 56.63 | d | 61.44 | f | 63.17 | e | 65.94 | g | 58.65 | c | 49.91 | h | 35.17 | f | 26.29 | c | 46.33 | d |
1993 | 21.45 | c | 22.79 | b | 39.27 | a | 44.15 | d | 55.96 | f | 55.71 | b | 58.26 | b | 62.39 | c | 56.94 | f | 48.40 | f | 31.86 | e | 31.57 | d | 40.83 | c |
1994 | 33.07 | b | 31.72 | c | 43.71 | b | 46.17 | g | 54.79 | c | 60.39 | c | 68.84 | f | 66.72 | d | 56.08 | f | 48.52 | d | 28.43 | c | 27.28 | d | 43.85 | c |
1995 | 33.30 | c | 43.69 | d | 41.88 | b | 44.78 | a | ----- | z | 56.90 | d | 64.26 | b | 61.70 | d | 57.24 | g | 48.02 | e | 40.52 | c | ----- | z | 48.34 | c |
1996 | 33.80 | d | 35.48 | h | 42.94 | g | 46.04 | b | 48.80 | d | 57.60 | i | 67.80 | k | 65.93 | d | ----- | z | 47.40 | e | ----- | z | 38.75 | e | 46.78 | f |
1997 | 30.10 | a | 36.06 | c | 44.62 | e | 44.17 | g | 54.75 | e | 58.00 | d | 63.80 | d | 63.85 | d | 58.26 | c | 49.98 | g | 39.48 | e | ----- | z | 49.88 | c |
1998 | 36.31 | e | 36.90 | d | 42.07 | c | 42.48 | d | 44.04 | f | 55.96 | d | 69.23 | c | 65.69 | d | 57.73 | h | 44.67 | g | 38.04 | b | 29.96 | f | 48.33 | d |
1999 | ----- | z | 30.69 | b | 37.26 | d | 42.10 | e | 48.74 | d | 56.96 | e | 67.27 | c | 63.96 | d | 56.32 | e | 53.46 | d | 42.83 | g | 29.36 | f | 50.75 | c |
2000 | 32.76 | h | 38.57 | h | 44.68 | f | 49.16 | h | 49.65 | g | 58.65 | f | 65.31 | d | 68.24 | d | 57.21 | d | 49.09 | h | 32.78 | l | 27.94 | d | 54.68 | h |
2001 | 25.44 | d | 30.25 | b | 42.59 | d | 42.12 | f | 55.46 | c | 55.79 | i | 64.60 | f | 67.79 | c | 59.00 | f | 46.60 | f | 36.60 | f | 32.02 | d | 42.26 | f |
2002 | 32.96 | e | 36.54 | e | 41.17 | d | 45.19 | i | 48.38 | e | 56.40 | d | 69.86 | b | 61.79 | c | 54.27 | d | 44.44 | d | 33.48 | f | 37.72 | d | 48.35 | b |
2003 | 39.44 | f | 37.30 | c | 40.04 | e | 42.83 | c | 52.16 | c | 61.69 | c | 72.69 | e | 66.70 | c | 61.46 | e | 50.23 | e | 33.85 | d | 34.76 | b | 50.34 | a |
2004 | 27.17 | b | 30.22 | f | 46.07 | c | 47.50 | c | 52.78 | d | 58.29 | f | 64.88 | c | 63.05 | c | 56.24 | c | 43.83 | b | 36.10 | d | 37.00 | f | 48.62 | c |
2005 | 34.26 | d | 35.98 | d | 42.81 | b | ----- | z | 49.76 | f | 51.09 | g | 67.93 | d | 63.81 | d | 53.08 | d | 46.28 | d | 35.52 | g | 24.20 | d | 46.04 | d |
2006 | 36.74 | d | 30.00 | g | 37.69 | d | ----- | z | 54.90 | f | 59.71 | b | 69.80 | c | 61.71 | g | 57.79 | d | ----- | z | 37.50 | d | 27.12 | a | 46.62 | e |
2007 | 23.42 | 35.75 | b | 45.02 | c | 44.30 | b | 47.98 | f | 63.50 | g | 71.09 | h | 64.74 | l | 54.94 | e | 42.72 | b | 38.82 | 23.88 | b | 38.61 | d | ||
2008 | 16.91 | b | 30.52 | a | 31.69 | 37.80 | c | 47.58 | e | 52.18 | b | 65.27 | e | 66.84 | f | 55.23 | d | ----- | z | ----- | z | 30.17 | e | 40.82 | c | |
2009 | 34.62 | b | ----- | z | ----- | z | ----- | z | 58.58 | y | 62.91 | s | 69.42 | r | 68.55 | l | 62.19 | l | 45.50 | q | 36.98 | j | 24.50 | h | 34.62 | k |
2010 | 34.81 | j | 33.88 | k | 41.58 | k | 43.65 | j | 49.61 | i | 60.17 | g | 67.20 | i | 66.14 | i | 57.54 | p | 47.75 | m | 37.75 | r | 33.13 | p | ----- | z |
2011 | 30.39 | m | 29.79 | p | 40.24 | n | 43.20 | o | 50.17 | m | 58.24 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.25 | 33.97 | 39.40 | 44.36 | 52.56 | 59.45 | 66.95 | 65.06 | 56.71 | 47.16 | 36.67 | 29.61 | 47.31 | |||||||||||||
S.D. | 5.02 | 4.38 | 3.38 | 3.12 | 3.20 | 2.78 | 2.94 | 2.41 | 2.90 | 2.48 | 2.99 | 4.41 | 0.0 | |||||||||||||
SKEW | -0.76 | -0.30 | 0.05 | -0.14 | 0.23 | -0.18 | -0.44 | 0.21 | 0.05 | 0.44 | -0.89 | -0.24 | 0.00 | |||||||||||||
MAX | 36.74 | 43.69 | 46.07 | 50.29 | 60.05 | 65.69 | 72.69 | 69.63 | 61.62 | 53.46 | 40.52 | 38.75 | 47.31 | |||||||||||||
MIN | 16.91 | 22.79 | 31.69 | 37.80 | 47.58 | 52.18 | 58.26 | 61.70 | 50.83 | 42.72 | 28.43 | 17.78 | 47.31 | |||||||||||||
YRS | 36 | 38 | 42 | 30 | 34 | 33 | 37 | 38 | 36 | 20 | 36 | 33 | 1 |