YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | 28.31 | o | 25.09 | 40.03 | 49.45 | 57.60 | 66.43 | 68.37 | a | 66.97 | 61.90 | 48.83 | a | 38.85 | 35.63 | a | 50.83 | a | ||||||||
1940 | 28.85 | a | 30.84 | 42.15 | a | 46.53 | 56.56 | 62.88 | 68.61 | 64.97 | 59.95 | 52.75 | a | 35.77 | 32.16 | 48.50 | ||||||||||
1941 | 25.79 | 32.59 | 33.65 | 43.02 | 53.68 | 59.98 | 64.55 | 66.16 | o | 59.36 | l | 47.68 | 38.63 | 25.75 | o | 44.40 | c | |||||||||
1942 | 32.97 | ----- | z | ----- | z | 41.92 | x | 54.90 | 64.86 | a | 71.40 | 63.71 | 54.75 | 45.27 | 44.47 | 36.74 | 52.12 | c | ||||||||
1943 | 33.31 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.00 | v | 69.27 | c | 58.95 | ----- | z | ----- | z | ----- | z | 53.84 | i | |
1944 | 25.57 | b | ----- | z | 39.73 | k | 43.95 | b | 53.52 | 64.15 | 67.79 | 65.92 | 58.10 | 53.00 | 37.60 | 29.11 | m | 52.18 | c | |||||||
1945 | 27.97 | ----- | z | 39.21 | l | 44.10 | a | 55.38 | b | 62.03 | a | 68.32 | 68.47 | 63.70 | b | 50.26 | 40.64 | b | 28.25 | a | 50.91 | b | ||||
1946 | 28.55 | c | 33.04 | 41.61 | 53.07 | 55.08 | 68.35 | 71.16 | f | 69.29 | g | 65.64 | a | 54.13 | a | 41.40 | d | 33.53 | l | 48.99 | c | |||||
1947 | 27.83 | a | 36.86 | 40.27 | 45.93 | 58.53 | 64.33 | 71.14 | m | 66.37 | a | 63.23 | f | 53.56 | 33.43 | a | 28.06 | 45.52 | b | |||||||
1948 | 27.92 | 31.69 | 33.31 | 51.52 | 57.29 | 64.96 | b | 70.73 | c | 68.25 | y | ----- | z | ----- | z | ----- | z | 34.02 | 46.43 | d | ||||||
1949 | 23.29 | 31.14 | 40.15 | 46.87 | 54.90 | 64.64 | a | 68.58 | r | ----- | z | 62.34 | n | 50.35 | e | 45.40 | 30.47 | a | 43.02 | c | ||||||
1950 | 35.00 | 37.78 | a | 43.41 | i | 51.57 | 57.06 | 67.07 | 67.63 | 64.87 | 57.17 | 56.13 | 43.34 | a | 37.02 | 52.24 | a | |||||||||
1951 | 30.81 | 33.93 | a | 39.26 | 46.73 | b | 57.50 | a | 65.38 | 72.39 | 68.38 | j | 64.81 | l | 50.39 | d | 36.92 | j | 29.60 | e | 47.33 | c | ||||
1952 | 35.31 | b | 33.16 | 34.82 | c | 46.88 | a | 56.77 | 67.33 | 69.02 | i | 69.72 | k | 61.41 | c | 52.81 | 33.45 | 29.15 | 45.11 | b | ||||||
1953 | 36.42 | 30.64 | 41.45 | a | 46.21 | b | 51.13 | a | 66.75 | 70.02 | 67.17 | e | 63.31 | l | 47.07 | p | 41.05 | 27.73 | a | 47.86 | b | |||||
1954 | 32.71 | 39.93 | a | 37.98 | b | 52.22 | a | 56.81 | b | 66.42 | 70.16 | 67.09 | c | 64.16 | a | 52.85 | a | 41.87 | 30.22 | a | 51.03 | |||||
1955 | 27.19 | 28.82 | 40.29 | 45.56 | c | 54.83 | b | 63.82 | 65.85 | 66.11 | 62.69 | a | 53.05 | 39.53 | 34.15 | a | 48.49 | |||||||||
1956 | 36.89 | 29.71 | 40.90 | b | 45.43 | 58.48 | c | 66.28 | c | 64.42 | y | 62.38 | n | 63.02 | 52.13 | 35.12 | a | 33.35 | k | 47.55 | c | |||||
1957 | 34.42 | 40.98 | 39.92 | e | 44.80 | 51.17 | b | 64.12 | a | 69.20 | a | 65.73 | a | 60.82 | 48.77 | a | 33.81 | f | 32.59 | t | 51.99 | b | ||||
1958 | 30.39 | 36.77 | 34.63 | 44.30 | b | 58.79 | j | 67.07 | 71.44 | 69.63 | 60.00 | a | 49.25 | a | 36.21 | k | 28.67 | y | 51.50 | c | ||||||
1959 | 28.44 | ----- | z | ----- | z | 46.77 | j | ----- | z | ----- | z | 67.56 | g | 65.39 | ----- | z | ----- | z | ----- | z | ----- | z | 46.91 | j | ||
1960 | ----- | z | ----- | z | ----- | z | 53.25 | r | 57.64 | b | 70.50 | c | 71.37 | d | 71.12 | k | 65.92 | d | 58.64 | x | 43.34 | n | 29.66 | o | 66.36 | h |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | 58.92 | 67.78 | 69.82 | 66.97 | 59.10 | 50.67 | h | 36.47 | 30.71 | 55.68 | e | |||||||
1962 | 28.67 | a | 38.88 | 37.07 | d | 52.18 | b | 59.79 | b | 65.48 | 67.85 | 70.92 | a | 62.62 | b | 51.91 | b | 43.25 | 34.66 | 51.11 | ||||||
1963 | 26.68 | 35.58 | b | 40.15 | a | 50.83 | 61.47 | a | 65.71 | b | 72.35 | 66.91 | b | 63.69 | a | 56.84 | 42.07 | 32.70 | c | 51.25 | ||||||
1964 | 27.48 | b | 26.09 | 36.34 | 45.53 | 57.45 | a | 66.05 | 70.94 | 67.98 | 61.31 | a | 54.24 | 39.83 | 32.18 | a | 48.79 | |||||||||
1965 | 34.25 | a | 32.50 | 35.56 | 48.55 | b | 55.82 | a | 63.78 | a | 69.68 | 66.60 | b | 59.70 | b | 51.56 | 42.40 | 37.29 | q | 50.95 | a | |||||
1966 | 25.50 | d | 27.62 | 41.00 | 48.10 | 58.42 | 65.05 | a | 70.63 | 66.10 | 60.23 | 49.84 | 42.95 | 30.22 | a | 48.81 | ||||||||||
1967 | 28.75 | a | 35.07 | 45.85 | a | 49.62 | 54.74 | 62.28 | 70.19 | 63.61 | 58.22 | 51.08 | 41.48 | 25.32 | a | 48.85 | ||||||||||
1968 | 29.08 | 33.52 | g | 37.77 | 43.95 | 54.32 | 65.53 | 67.39 | 63.53 | b | 58.77 | 50.13 | 38.23 | 26.94 | o | 50.87 | b | |||||||||
1969 | 34.84 | 32.52 | 32.11 | 48.08 | 55.05 | 62.45 | 70.66 | 69.40 | 60.87 | 46.00 | c | 37.98 | j | ----- | z | 51.20 | b | |||||||||
1970 | 31.44 | d | 35.92 | b | ----- | z | ----- | z | 61.28 | f | 65.12 | 69.55 | a | 68.77 | 61.60 | d | 46.10 | 40.77 | 35.50 | b | 50.53 | c | ||||
1971 | 32.50 | a | 34.05 | 42.34 | 46.93 | 56.56 | 67.55 | 70.42 | 66.23 | 60.20 | 49.13 | 39.08 | 30.32 | 49.61 | ||||||||||||
1972 | 33.15 | 38.83 | 48.23 | 52.80 | 57.47 | a | 66.32 | b | 70.72 | a | 66.56 | 60.57 | 51.31 | 34.70 | 31.84 | 51.04 | ||||||||||
1973 | 28.89 | 32.80 | 36.85 | 41.88 | 54.69 | 65.75 | 68.24 | 68.55 | 60.83 | 53.65 | 43.78 | 33.40 | 49.11 | |||||||||||||
1974 | 30.18 | 33.23 | 46.00 | 47.98 | 61.11 | 70.23 | 69.22 | a | 65.87 | 58.62 | 50.97 | 39.50 | a | 29.15 | 50.17 | |||||||||||
1975 | 29.45 | 33.05 | 39.26 | 44.70 | 54.18 | c | 65.65 | 67.95 | 68.61 | c | 59.43 | a | 53.18 | a | 40.70 | 33.94 | 49.18 | |||||||||
1976 | 31.02 | 40.83 | 40.63 | 48.80 | 56.39 | 66.77 | 68.70 | a | 66.53 | 60.58 | 47.73 | 37.57 | a | 30.84 | 49.70 | |||||||||||
1977 | 28.06 | 35.30 | 37.76 | 49.02 | 56.84 | 69.17 | 69.58 | 69.44 | 63.27 | 54.25 | a | 42.65 | 38.69 | 51.17 | ||||||||||||
1978 | 32.81 | 34.11 | 43.19 | 50.77 | 55.82 | 68.12 | 72.79 | 66.46 | f | 61.30 | 53.16 | 40.62 | b | 29.63 | a | 49.30 | a | |||||||||
1979 | 26.45 | 34.15 | a | 39.73 | 47.63 | 54.71 | 65.18 | 70.81 | 66.31 | b | 64.13 | 54.73 | e | 34.83 | 34.07 | b | 49.39 | |||||||||
1980 | 34.34 | 36.97 | 38.45 | 45.82 | 54.19 | 70.21 | f | 74.50 | 68.84 | 62.68 | 49.11 | 40.48 | 40.18 | a | 49.60 | a | ||||||||||
1981 | 35.45 | 39.04 | 39.29 | 52.77 | 56.29 | 69.70 | 71.13 | 67.16 | 62.37 | 51.18 | 45.03 | 37.67 | a | 52.26 | ||||||||||||
1982 | 33.47 | b | 33.52 | 40.81 | 48.18 | 55.92 | 66.60 | 71.20 | a | 68.06 | 61.62 | 49.85 | a | 39.22 | a | 31.70 | h | 51.68 | a | |||||||
1983 | 32.42 | a | 35.02 | 40.47 | a | 42.95 | a | 54.27 | 64.63 | 69.82 | a | 69.47 | 66.15 | f | ----- | z | 33.00 | p | 32.12 | f | 51.13 | d | ||||
1984 | 28.00 | a | 34.18 | a | 39.62 | c | 44.30 | c | 61.68 | 65.77 | b | 70.95 | 66.61 | 64.33 | l | ----- | z | ----- | z | ----- | z | 51.39 | d | |||
1985 | ----- | z | ----- | z | 40.45 | 48.43 | 55.63 | d | 64.12 | 67.13 | 66.95 | 57.23 | 49.28 | a | 40.29 | a | 31.85 | 52.14 | b | |||||||
1986 | 35.94 | 37.24 | a | 42.74 | 48.92 | 54.60 | 62.57 | 65.19 | 66.47 | 57.40 | 46.22 | a | 36.50 | 29.63 | 48.62 | |||||||||||
1987 | 27.20 | a | 31.23 | 37.24 | 50.79 | p | 53.26 | b | 62.07 | 66.44 | 64.85 | 58.35 | 51.69 | 37.57 | 28.81 | 47.16 | a | |||||||||
1988 | 26.56 | 35.93 | 38.77 | 46.22 | a | 54.23 | 63.31 | a | 67.40 | 65.39 | 56.60 | 51.68 | 38.88 | 29.05 | 47.84 | |||||||||||
1989 | 28.81 | 34.55 | 43.62 | a | 52.10 | 58.89 | 65.17 | 67.47 | a | 64.71 | 60.40 | 48.23 | a | 39.17 | 29.13 | 49.35 | ||||||||||
1990 | 27.88 | a | 31.21 | 40.74 | 48.10 | 53.73 | 67.57 | 65.85 | a | 63.18 | 60.58 | 49.84 | 39.21 | a | 27.08 | a | 47.91 | |||||||||
1991 | 27.32 | a | 36.05 | 38.29 | 46.80 | 55.34 | 61.38 | a | 65.37 | 64.53 | 57.97 | 50.06 | 36.11 | c | 29.26 | 47.37 | ||||||||||
1992 | 25.81 | 34.53 | 40.26 | 49.70 | 54.50 | a | 61.75 | d | 66.39 | 64.79 | 60.57 | a | 51.68 | a | 31.76 | a | 25.47 | a | 47.27 | |||||||
1993 | 31.80 | c | 34.85 | b | 40.62 | a | 48.37 | 55.30 | c | 64.21 | a | 68.37 | a | 65.37 | a | 58.75 | b | 47.59 | d | 35.02 | b | 30.79 | 48.42 | |||
1994 | 31.55 | c | 32.64 | 40.63 | a | 47.71 | b | 54.73 | 67.26 | c | 68.63 | a | 67.84 | 60.05 | 47.23 | 37.07 | a | 33.80 | a | 49.10 | ||||||
1995 | 30.19 | 39.70 | ----- | z | 43.83 | d | 53.15 | h | 61.22 | a | 66.87 | 68.55 | 60.87 | d | 50.45 | a | 42.14 | a | 33.39 | 49.72 | b | |||||
1996 | 32.63 | a | 38.29 | a | 39.33 | b | 48.43 | g | 61.37 | a | 66.26 | a | 68.70 | d | 66.04 | d | 56.19 | c | 48.59 | c | 38.83 | 33.94 | e | 50.01 | a | |
1997 | 30.02 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.78 | d | 61.85 | d | 49.57 | c | 37.12 | d | 25.59 | c | 47.98 | g |
1998 | 32.29 | b | 31.72 | c | 38.44 | f | 44.58 | f | 54.75 | m | 65.19 | c | 67.31 | b | 66.48 | f | 63.88 | e | 49.77 | e | 41.06 | c | 32.59 | c | 47.98 | d |
1999 | 35.90 | a | 37.48 | d | 41.60 | f | 44.65 | d | 55.00 | c | 57.94 | e | 61.35 | e | 58.52 | c | 52.20 | j | 44.35 | d | 38.14 | b | 23.85 | g | 48.15 | c |
2000 | 26.29 | j | 33.38 | d | 34.23 | i | 41.26 | m | 62.13 | l | 66.15 | g | 69.15 | h | 67.81 | j | 63.89 | k | 48.50 | j | 31.48 | 32.06 | g | 32.43 | j | |
2001 | 26.00 | b | 35.07 | e | 40.55 | i | 49.61 | k | 57.94 | f | 65.58 | j | 69.50 | m | ----- | z | 61.58 | k | 52.92 | l | 38.29 | m | 34.25 | y | 30.53 | j |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | 39.12 | b | 48.17 | a | 58.95 | a | 67.60 | 74.20 | c | 68.77 | a | 65.32 | 50.82 | 44.32 | 34.19 | 55.15 | b | |||||
2006 | 35.80 | k | 36.53 | m | 43.88 | n | 53.77 | 63.60 | 71.02 | 69.97 | 65.69 | 57.71 | f | 50.48 | d | 43.53 | n | 32.29 | s | 62.42 | f | |||||
2007 | 27.02 | i | 24.67 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.94 | n | 69.16 | 63.02 | 52.67 | b | 43.73 | d | 40.44 | w | 57.15 | h | ||
2009 | 35.94 | 40.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.99 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.49 | 34.37 | 39.61 | 47.67 | 56.32 | 65.37 | 69.08 | 66.62 | 60.73 | 50.67 | 39.34 | 31.71 | 49.37 | |||||||||||||
S.D. | 3.44 | 3.53 | 3.12 | 2.97 | 2.52 | 2.56 | 2.43 | 2.10 | 2.47 | 2.67 | 3.36 | 3.46 | 1.31 | |||||||||||||
SKEW | 0.13 | -0.28 | 0.04 | 0.24 | 0.68 | -0.25 | -0.40 | -0.86 | -0.03 | -0.11 | -0.34 | 0.29 | 0.45 | |||||||||||||
MAX | 36.89 | 40.98 | 48.23 | 53.77 | 63.60 | 71.02 | 74.50 | 70.92 | 65.92 | 56.84 | 45.40 | 40.18 | 52.26 | |||||||||||||
MIN | 23.29 | 25.09 | 32.11 | 41.88 | 51.13 | 57.94 | 61.35 | 58.52 | 54.75 | 44.35 | 31.48 | 25.32 | 47.27 | |||||||||||||
YRS | 58 | 54 | 49 | 53 | 56 | 59 | 55 | 54 | 53 | 56 | 54 | 46 | 25 |