YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | 53.45 | 58.97 | 60.63 | 59.35 | 58.73 | 56.56 | 50.98 | 46.93 | a | 55.70 | d | |||||||
1938 | 45.15 | a | 46.25 | 47.07 | a | 51.10 | a | 52.55 | 56.17 | 59.69 | 58.13 | 59.41 | b | 55.31 | 45.47 | 44.27 | 51.71 | |||||||||
1939 | 42.44 | 42.18 | 47.50 | 51.57 | 54.35 | 55.43 | 59.69 | 59.39 | 60.10 | 54.76 | 47.10 | 47.67 | a | 51.85 | ||||||||||||
1940 | 47.44 | 48.95 | 50.47 | 52.22 | 55.81 | 57.50 | 60.16 | 61.76 | 60.42 | 55.73 | 46.37 | 44.82 | a | 53.47 | ||||||||||||
1941 | 44.42 | 49.62 | 50.85 | 50.50 | 55.61 | 57.33 | 60.77 | 60.11 | 57.80 | 53.31 | 50.62 | a | 46.97 | 53.16 | ||||||||||||
1942 | 44.87 | 44.56 | a | 46.47 | 49.47 | 52.27 | 56.80 | 62.20 | a | 62.26 | 58.95 | 55.76 | 48.62 | 46.29 | 52.38 | |||||||||||
1943 | 42.53 | 47.23 | 49.21 | 51.35 | 52.47 | 55.87 | 58.82 | 59.30 | a | 60.98 | 54.27 | a | 50.57 | p | 43.76 | 52.34 | a | |||||||||
1944 | 45.10 | 44.09 | 46.53 | 49.00 | 52.26 | 54.82 | 57.74 | 59.35 | 58.33 | 54.85 | 47.35 | 45.98 | 51.28 | |||||||||||||
1945 | 44.65 | 46.95 | 45.92 | 48.92 | 53.66 | 56.74 | a | 61.07 | b | 59.61 | 58.40 | 53.34 | 48.03 | 46.24 | 51.96 | |||||||||||
1946 | 42.50 | 43.62 | 46.61 | 49.20 | 52.66 | 56.60 | 59.08 | 58.68 | a | 57.10 | 51.66 | c | 45.83 | a | 43.89 | 50.62 | ||||||||||
1947 | 39.89 | 48.02 | a | 50.00 | 52.24 | a | 56.03 | 57.53 | 60.05 | 60.02 | 59.68 | 55.70 | a | 46.90 | 43.98 | 52.50 | ||||||||||
1948 | 43.97 | 43.09 | 45.42 | 47.28 | 51.26 | b | 57.72 | 58.65 | a | 59.84 | 57.30 | 53.47 | 46.05 | 40.77 | a | 50.40 | ||||||||||
1949 | 36.18 | 42.88 | 47.29 | 51.33 | 54.23 | 56.73 | 56.18 | 58.23 | a | 59.33 | 50.34 | 52.05 | 41.73 | 50.54 | ||||||||||||
1950 | 38.46 | g | 45.02 | 47.15 | 48.64 | a | 50.85 | 56.48 | 60.18 | 61.47 | 58.57 | 57.74 | 52.08 | 49.92 | 53.46 | a | ||||||||||
1951 | 43.24 | 46.27 | 45.34 | 49.47 | a | 53.58 | a | 56.38 | 58.16 | 59.11 | 58.62 | 55.03 | 50.07 | 43.58 | 51.57 | |||||||||||
1952 | 41.37 | a | 46.29 | 44.53 | 49.48 | 53.26 | 54.80 | 59.39 | 58.32 | 58.79 | a | 55.76 | 46.60 | 43.89 | 51.04 | |||||||||||
1953 | 48.69 | 46.27 | 46.52 | 48.87 | 51.73 | 54.23 | 58.29 | 59.10 | a | 60.72 | a | 54.37 | 51.47 | 45.29 | 52.13 | |||||||||||
1954 | 44.31 | 48.61 | 46.60 | 51.28 | 52.61 | 54.98 | 57.69 | 58.95 | 58.23 | 53.60 | 50.43 | 44.21 | 51.79 | |||||||||||||
1955 | 41.89 | 43.45 | 45.76 | 46.12 | 51.26 | 55.53 | 56.92 | 57.16 | 57.95 | 53.94 | 47.72 | 46.82 | 50.38 | |||||||||||||
1956 | 46.10 | 42.57 | 47.00 | 49.88 | 53.82 | 55.78 | 58.88 | a | 59.21 | 58.00 | 53.65 | a | 47.57 | a | 43.13 | 51.30 | ||||||||||
1957 | 40.23 | 47.20 | a | 48.63 | 50.22 | 55.23 | 58.28 | 58.97 | 60.06 | 61.25 | 55.32 | 47.93 | 46.98 | a | 52.53 | |||||||||||
1958 | 47.68 | c | 51.12 | 46.30 | a | 50.05 | 56.10 | 60.38 | 61.56 | 62.52 | 61.70 | 55.85 | 51.10 | a | 49.56 | 54.49 | ||||||||||
1959 | 46.52 | a | 45.61 | a | 48.62 | c | 51.42 | 52.73 | 56.95 | a | 58.45 | 59.76 | 58.81 | d | 55.17 | e | 48.54 | e | 43.60 | f | 52.96 | a | ||||
1960 | 44.65 | d | 45.38 | c | 48.71 | c | 49.90 | a | 52.10 | 57.84 | a | 58.07 | c | 58.06 | d | 56.57 | 54.26 | 48.85 | 45.98 | b | 51.70 | |||||
1961 | 46.66 | 48.72 | a | 47.95 | a | 49.45 | 51.40 | a | 58.39 | b | 58.91 | h | 60.91 | d | 57.40 | 53.37 | 46.90 | d | 44.18 | a | 51.39 | a | ||||
1962 | 43.44 | 45.84 | 46.69 | 50.78 | 51.63 | 54.03 | 57.31 | 59.94 | 58.81 | c | 54.46 | g | 50.60 | a | 47.16 | 51.48 | a | |||||||||
1963 | 41.60 | 52.96 | 46.58 | 48.63 | 53.95 | 55.20 | b | 58.33 | e | 58.53 | 61.11 | b | 56.18 | 49.91 | b | 45.97 | a | 52.41 | ||||||||
1964 | 43.55 | a | 46.05 | a | 45.23 | 46.20 | 51.16 | 55.10 | 58.61 | 58.65 | 57.20 | 56.32 | 47.52 | e | 46.65 | 51.02 | ||||||||||
1965 | 45.77 | c | 44.70 | 48.11 | 50.70 | b | 49.74 | 53.48 | 55.97 | 59.42 | a | 55.15 | c | 56.35 | 51.33 | a | 43.15 | 51.15 | ||||||||
1966 | 44.55 | 45.05 | 47.34 | 50.95 | ----- | z | 54.71 | f | 57.68 | 58.78 | a | 59.60 | a | 53.88 | c | 50.17 | a | 46.21 | 51.42 | b | ||||||
1967 | 44.63 | a | 46.48 | a | 45.68 | 45.69 | a | 53.05 | a | 56.85 | 59.06 | 59.98 | c | 61.74 | a | 56.45 | 50.42 | 42.10 | a | 51.84 | ||||||
1968 | 43.55 | 51.57 | 49.53 | 46.48 | 51.82 | 55.86 | b | 58.43 | c | 61.03 | b | 59.22 | 53.06 | d | 49.00 | b | 42.73 | c | 51.86 | |||||||
1969 | 42.22 | b | 43.75 | b | 47.56 | 48.57 | a | 54.90 | a | 57.20 | c | 57.06 | 57.43 | a | 57.78 | 54.33 | a | 50.40 | f | 46.35 | e | 51.56 | a | |||
1970 | 48.52 | b | 50.09 | a | 47.87 | 45.85 | 52.72 | b | 56.14 | a | 57.95 | 56.47 | a | 56.97 | 52.90 | 51.46 | b | 44.23 | a | 51.76 | ||||||
1971 | 43.53 | a | 45.29 | 46.82 | 46.65 | 50.30 | c | 55.65 | 56.95 | 61.39 | 58.28 | 49.10 | f | 47.38 | 41.56 | 50.35 | a | |||||||||
1972 | 42.45 | 47.72 | 50.42 | 47.55 | 52.38 | a | 55.60 | 58.98 | 60.10 | a | 55.55 | k | 54.67 | a | 49.23 | 40.89 | 50.91 | a | ||||||||
1973 | 42.58 | a | 47.98 | a | 45.45 | 50.17 | 53.73 | a | 57.67 | a | 56.81 | 57.00 | 60.03 | 51.50 | d | 48.31 | a | 47.70 | c | 51.58 | ||||||
1974 | 43.88 | c | 44.93 | 49.02 | 49.48 | 50.95 | 55.04 | c | 59.06 | 59.62 | a | 58.67 | c | 53.79 | 48.75 | 45.58 | 51.56 | |||||||||
1975 | 44.74 | 46.00 | 46.71 | 45.57 | a | 53.23 | 55.83 | 58.64 | b | 57.79 | 57.34 | b | 52.17 | d | 46.57 | 46.08 | 50.89 | |||||||||
1976 | 45.11 | 45.29 | 45.30 | c | 47.00 | b | 52.62 | a | 54.10 | 59.53 | 60.08 | 58.74 | a | 54.98 | f | 51.19 | c | 42.21 | b | 51.02 | a | |||||
1977 | 44.22 | b | 49.43 | 44.78 | b | 48.42 | 50.84 | 56.05 | a | 56.00 | b | 59.42 | 57.86 | a | 54.47 | a | 48.12 | 49.40 | g | 51.78 | a | |||||
1978 | 49.12 | c | 48.48 | 52.27 | 50.41 | a | 53.20 | c | 58.07 | a | 59.52 | a | 60.18 | a | 59.07 | 56.16 | 45.37 | c | 40.79 | 52.72 | ||||||
1979 | 42.13 | d | 46.23 | 49.07 | a | 50.50 | 54.15 | ----- | z | 60.29 | 59.81 | 62.78 | 57.35 | 49.02 | 46.00 | a | 52.48 | a | ||||||||
1980 | 45.30 | a | 50.60 | 46.48 | 50.97 | ----- | z | 55.29 | a | ----- | z | ----- | z | 58.34 | b | 55.53 | 49.32 | 47.94 | 51.09 | c | ||||||
1981 | 49.77 | 48.89 | 48.55 | 50.13 | 52.65 | 56.63 | 57.68 | 58.85 | 58.16 | a | 53.15 | 51.05 | 49.06 | 52.88 | ||||||||||||
1982 | 41.61 | 45.98 | b | 46.52 | b | 49.12 | a | 50.74 | b | 55.57 | 58.17 | a | 59.20 | a | 57.66 | a | 54.45 | b | 47.93 | 45.53 | a | 51.04 | ||||
1983 | 46.56 | g | 49.50 | b | 50.63 | 48.88 | a | 53.31 | 56.20 | c | 59.00 | ----- | z | 59.74 | e | 56.10 | 49.11 | b | 46.40 | 52.89 | b | |||||
1984 | 46.03 | 46.84 | 50.10 | a | 48.45 | 53.22 | b | 54.25 | 58.40 | 59.92 | 58.28 | 52.44 | 48.17 | 42.39 | 51.54 | |||||||||||
1985 | 43.98 | 46.20 | 45.02 | 51.16 | a | 51.50 | a | 57.78 | a | 60.38 | c | 58.90 | b | 56.73 | j | 53.88 | b | ----- | z | 44.11 | c | 51.29 | b | |||
1986 | 49.42 | 50.00 | b | 51.32 | ----- | z | 52.68 | 58.13 | c | 58.18 | a | 59.79 | b | 56.53 | a | 54.68 | a | ----- | z | ----- | z | 54.53 | c | |||
1987 | ----- | z | 48.31 | d | 49.34 | 52.17 | f | 55.73 | a | 57.16 | a | 58.24 | b | ----- | z | ----- | z | 57.43 | c | ----- | z | ----- | z | 54.37 | f | |
1988 | 46.10 | ----- | z | 47.39 | c | ----- | z | 52.96 | c | 56.62 | 59.84 | c | 57.97 | b | 56.67 | f | 55.19 | d | 48.62 | d | 42.83 | d | 51.95 | c | ||
1989 | 43.02 | b | 39.66 | f | 48.71 | b | 54.28 | 53.33 | a | 56.98 | c | 58.26 | d | 59.52 | a | 57.23 | 53.10 | e | 48.80 | 45.48 | h | 53.32 | b | |||
1990 | 45.52 | b | 42.27 | d | 49.35 | g | 49.71 | b | 49.98 | a | 55.41 | a | 61.47 | a | 61.08 | e | 61.10 | f | 52.92 | 46.12 | 37.08 | f | 51.61 | c | ||
1991 | 42.32 | f | 44.62 | x | 42.97 | p | 48.29 | b | 52.10 | b | 51.72 | a | 57.38 | a | 59.25 | a | 58.65 | 55.18 | 49.33 | a | 43.63 | 52.84 | c | |||
1992 | 45.60 | 50.40 | 51.03 | 53.64 | a | 55.81 | 57.97 | a | 60.67 | d | 58.33 | b | 56.48 | a | 56.27 | a | 48.00 | b | 41.79 | e | 53.00 | |||||
1993 | 43.35 | 46.07 | 50.58 | a | 49.60 | 51.56 | e | 50.92 | e | 56.32 | a | 59.62 | e | 56.34 | b | 55.19 | g | 46.09 | a | 44.17 | d | 50.42 | a | |||
1994 | 46.43 | a | 45.28 | c | 49.29 | 50.58 | 53.79 | b | 55.00 | b | 57.02 | b | 59.10 | 58.90 | 52.34 | b | 42.55 | h | 42.71 | g | 52.77 | b | ||||
1995 | 49.26 | f | 50.68 | c | 48.92 | f | 47.84 | a | 52.40 | b | 55.37 | c | 60.14 | b | 58.10 | b | 59.64 | b | 53.52 | c | 49.34 | k | 49.22 | m | 54.71 | d |
1996 | 46.93 | d | 49.60 | i | 50.76 | l | 51.48 | f | 52.86 | i | 56.34 | h | 60.82 | c | 59.27 | i | 57.64 | e | 54.70 | k | 51.62 | j | 47.17 | j | 55.13 | i |
1997 | 43.69 | e | 44.69 | g | 49.17 | j | 49.21 | i | 54.90 | k | 54.86 | l | 59.67 | d | 61.17 | d | 62.86 | l | 55.97 | o | 53.29 | f | 45.76 | l | 54.84 | i |
1998 | 48.07 | q | ----- | z | ----- | z | 54.62 | v | 53.50 | g | 57.16 | e | 59.71 | 59.28 | a | 57.96 | c | 52.55 | c | 48.83 | c | 42.50 | e | 54.00 | e | |
1999 | 44.93 | a | ----- | z | 45.30 | c | 46.79 | d | ----- | z | 53.05 | b | 55.93 | i | 59.56 | e | 56.15 | d | 52.35 | a | 50.15 | g | 43.15 | a | 50.16 | d |
2000 | 42.85 | d | 46.90 | e | 44.68 | a | 51.48 | a | 52.75 | c | 57.75 | j | 58.12 | c | 57.87 | 58.79 | a | ----- | z | ----- | z | ----- | z | 51.68 | d | |
2001 | 43.97 | b | ----- | z | ----- | z | ----- | z | ----- | z | 53.71 | b | 55.63 | 57.98 | d | 55.61 | c | 53.69 | r | 49.69 | c | 45.83 | e | 51.77 | e | |
2002 | 43.65 | a | 45.20 | a | 44.11 | c | 49.37 | c | 49.79 | b | 54.10 | a | 58.41 | b | 57.79 | c | 57.95 | a | 51.88 | b | 48.70 | c | 46.77 | e | 50.64 | |
2003 | 49.96 | d | 45.12 | 48.26 | d | 48.59 | c | 50.85 | a | 56.21 | b | 58.65 | a | 59.60 | a | 58.37 | g | 54.85 | a | ----- | z | 45.67 | h | 52.46 | c | |
2004 | 44.94 | d | 45.75 | e | 50.50 | d | 51.27 | 53.25 | a | 56.31 | d | 60.05 | ----- | z | 57.08 | 53.60 | e | ----- | z | ----- | z | 52.53 | c | |||
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.05 | 55.33 | 52.14 | i | 47.10 | f | 44.50 | f | 56.69 | j | ||
2006 | 45.30 | h | 44.44 | b | 44.10 | e | 48.03 | 53.10 | 57.00 | c | 59.45 | b | 56.53 | a | 55.12 | a | 52.38 | f | ----- | z | 44.39 | i | 52.22 | d | ||
2007 | 39.89 | h | 45.54 | c | 47.21 | e | 47.95 | 51.52 | d | 53.94 | l | ----- | z | ----- | z | ----- | z | 53.18 | n | 46.00 | m | 41.38 | b | 46.72 | g | |
2008 | 40.98 | c | 43.63 | c | 44.36 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.99 | i |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | 53.48 | a | 57.47 | 57.91 | b | 59.58 | 59.60 | e | 52.69 | b | 46.42 | f | 41.63 | e | 54.62 | e | ||
2010 | 48.19 | j | 47.92 | i | 46.58 | l | 48.67 | g | 49.15 | e | 54.89 | g | 53.09 | i | 57.98 | d | 58.15 | f | 55.06 | g | 44.64 | i | 43.65 | h | 53.57 | j |
2011 | 42.40 | a | 42.77 | 47.03 | b | 47.31 | f | 50.27 | g | 54.10 | j | 57.03 | b | 54.81 | b | ----- | z | ----- | z | 48.30 | b | ----- | z | 48.73 | f | |
2012 | ----- | z | 45.02 | e | ----- | z | ----- | z | ----- | z | 54.28 | c | 57.46 | f | 57.82 | c | 53.93 | a | 55.13 | h | ----- | z | ----- | z | 52.76 | h |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 44.39 | 46.52 | 47.52 | 49.43 | 52.73 | 56.07 | 58.74 | 59.19 | 58.38 | 54.37 | 48.70 | 44.76 | 51.79 | |||||||||||||
S.D. | 2.51 | 2.49 | 2.02 | 1.90 | 1.61 | 1.65 | 1.44 | 1.36 | 1.69 | 1.60 | 1.77 | 2.29 | 0.93 | |||||||||||||
SKEW | -0.07 | 0.42 | 0.31 | -0.06 | 0.16 | -0.47 | 0.04 | -0.19 | 0.02 | -0.08 | 0.06 | 0.11 | 0.71 | |||||||||||||
MAX | 49.96 | 52.96 | 52.27 | 54.28 | 56.10 | 60.38 | 62.20 | 62.52 | 62.78 | 57.74 | 52.08 | 49.92 | 54.49 | |||||||||||||
MIN | 36.18 | 42.18 | 44.10 | 45.57 | 49.15 | 50.92 | 55.63 | 54.81 | 53.93 | 50.34 | 45.37 | 40.77 | 50.38 | |||||||||||||
YRS | 63 | 64 | 64 | 62 | 65 | 66 | 68 | 69 | 65 | 61 | 56 | 57 | 35 |