YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | 44.35 | 50.20 | 49.65 | 44.19 | 48.17 | 46.32 | 44.53 | 39.84 | 45.91 | d | ||||||||
1938 | 38.13 | a | 38.93 | 39.43 | a | 43.21 | a | 41.77 | 45.87 | 48.74 | 46.39 | 48.45 | a | 44.10 | 36.90 | 37.19 | 42.43 | |||||||||
1939 | 34.84 | 33.54 | 38.29 | 40.00 | 43.58 | 45.53 | 49.06 | 49.23 | 46.70 | 44.06 | 36.97 | 41.17 | a | 41.91 | ||||||||||||
1940 | 39.48 | 41.97 | 40.58 | 41.87 | 44.35 | 46.00 | 50.55 | 49.84 | 49.60 | 45.06 | 38.63 | 37.83 | a | 43.81 | ||||||||||||
1941 | 39.74 | 40.36 | 39.71 | 40.57 | 46.84 | 47.57 | 50.35 | 50.97 | 45.27 | 42.45 | 42.90 | a | 40.35 | 43.92 | ||||||||||||
1942 | 37.23 | 34.67 | a | 34.81 | 39.97 | 44.45 | 46.33 | 53.27 | a | 54.65 | 49.40 | 46.32 | 41.63 | 40.23 | 43.58 | |||||||||||
1943 | 34.68 | 37.64 | 39.48 | 41.90 | 42.19 | 47.37 | 49.71 | 50.68 | 48.97 | 45.90 | 41.36 | b | 35.90 | 42.98 | ||||||||||||
1944 | 37.26 | 35.34 | 36.23 | 41.20 | 42.90 | 47.57 | 49.81 | 48.68 | 47.47 | 43.23 | 40.40 | 38.45 | 42.38 | |||||||||||||
1945 | 37.84 | 38.18 | 38.32 | 39.03 | 47.35 | 45.13 | 48.68 | 50.26 | 45.33 | 44.32 | 41.20 | 40.06 | 42.98 | |||||||||||||
1946 | 35.52 | 35.71 | 38.26 | 41.13 | 44.19 | 47.10 | 49.58 | 48.80 | a | 43.90 | 39.54 | c | 37.50 | 38.06 | 41.61 | |||||||||||
1947 | 32.87 | 40.00 | a | 41.29 | 42.20 | 43.90 | 48.83 | 50.58 | 50.13 | 46.73 | 48.67 | a | 39.00 | 38.06 | 43.52 | |||||||||||
1948 | 35.71 | 35.55 | 37.97 | 40.17 | 43.27 | a | 49.33 | 48.97 | a | 50.97 | 46.20 | 44.65 | 37.30 | 35.23 | 42.11 | |||||||||||
1949 | 28.06 | 37.25 | 40.55 | 41.33 | 46.84 | 45.27 | 44.74 | 46.90 | a | 47.73 | 39.19 | 43.87 | 35.61 | 41.45 | ||||||||||||
1950 | 33.92 | g | 38.46 | 39.90 | 38.43 | 39.87 | 49.20 | 49.61 | 51.35 | 48.20 | 49.61 | 45.43 | 43.84 | 44.90 | a | |||||||||||
1951 | 36.97 | 38.75 | 34.84 | 42.60 | 43.50 | a | 47.13 | 49.55 | 49.19 | 49.20 | 44.52 | 43.00 | 36.65 | 42.99 | ||||||||||||
1952 | 36.00 | a | 38.10 | 35.29 | 40.10 | 43.81 | 46.47 | 48.61 | 48.87 | 47.24 | a | 46.00 | 35.40 | 38.10 | 42.00 | |||||||||||
1953 | 42.39 | 36.75 | 36.77 | 39.73 | 42.55 | 44.77 | 47.68 | 49.29 | 50.20 | 42.10 | 44.63 | 38.26 | 42.93 | |||||||||||||
1954 | 37.71 | 39.00 | 36.97 | 40.67 | 42.26 | 46.37 | 48.19 | 50.23 | 46.90 | 42.03 | 42.50 | 37.42 | 42.52 | |||||||||||||
1955 | 34.26 | 33.96 | 35.10 | 37.50 | 41.42 | 45.57 | 48.65 | 47.52 | 45.50 | 43.97 | 40.33 | 41.03 | 41.23 | |||||||||||||
1956 | 40.29 | 34.52 | 37.61 | 41.10 | 44.68 | 45.97 | 50.32 | 49.61 | 45.13 | 43.30 | a | 37.10 | a | 35.94 | 42.13 | |||||||||||
1957 | 32.48 | 39.50 | 42.16 | 40.73 | 46.16 | 48.17 | 48.81 | 50.52 | 49.80 | 44.19 | 38.93 | 39.52 | 43.41 | |||||||||||||
1958 | 40.36 | c | 43.57 | 36.37 | a | 39.70 | 45.74 | 51.00 | 52.48 | 51.39 | 47.17 | 44.23 | 44.17 | a | 43.23 | 44.95 | ||||||||||
1959 | 39.63 | a | 36.56 | a | 38.24 | b | 41.37 | 42.52 | 47.80 | 46.84 | 48.03 | 47.35 | d | 44.07 | d | 37.77 | d | 34.88 | f | 42.74 | a | |||||
1960 | 37.30 | d | 35.38 | c | 40.93 | c | 40.45 | a | 43.58 | 46.63 | 47.69 | b | 46.86 | c | 45.23 | 44.42 | 41.33 | 37.69 | b | 42.29 | ||||||
1961 | 37.84 | 40.70 | a | 40.00 | a | 39.13 | 43.80 | a | 49.43 | b | 49.08 | g | 51.33 | d | 44.10 | 41.90 | 38.78 | c | 36.87 | a | 42.17 | a | ||||
1962 | 34.00 | 37.96 | 39.29 | 40.80 | 41.87 | 44.10 | 46.26 | 50.55 | 50.26 | c | 44.08 | g | 42.69 | a | 39.26 | 42.46 | a | |||||||||
1963 | 30.87 | 45.11 | 37.39 | 40.90 | 45.84 | 45.61 | b | 46.89 | d | 48.71 | 49.39 | b | 46.81 | 43.46 | b | 38.30 | a | 43.27 | ||||||||
1964 | 36.60 | a | 33.64 | a | 35.94 | 36.33 | 43.03 | 46.33 | 49.52 | 48.13 | 42.67 | 44.77 | 40.38 | d | 41.52 | 41.57 | ||||||||||
1965 | 39.21 | b | 34.21 | 37.39 | 42.00 | a | 39.68 | 43.90 | 45.97 | 48.40 | a | 43.37 | c | 44.71 | 43.47 | 35.06 | 41.45 | |||||||||
1966 | 36.90 | 35.86 | 39.29 | 40.00 | ----- | z | 43.69 | d | 47.77 | 47.20 | a | 46.55 | a | 42.07 | c | 42.31 | a | 38.71 | 41.85 | a | ||||||
1967 | 37.70 | a | 36.37 | a | 36.77 | 37.17 | a | 42.67 | a | 48.83 | 49.94 | 49.04 | c | 49.17 | 44.84 | 40.97 | 33.40 | a | 42.24 | |||||||
1968 | 35.32 | 44.00 | 39.39 | 34.80 | 41.77 | 44.90 | a | 48.89 | c | 51.03 | b | 47.70 | 42.43 | c | 42.32 | b | 36.14 | c | 42.39 | |||||||
1969 | 35.24 | b | 36.42 | b | 35.52 | 39.17 | a | 44.73 | a | 50.22 | c | 47.61 | 46.43 | a | 45.10 | 42.43 | a | 39.54 | f | 38.78 | d | 41.97 | a | |||
1970 | 42.55 | b | 38.75 | 37.16 | 35.07 | 42.13 | a | 46.90 | a | 48.00 | 45.19 | 41.43 | 41.03 | 43.39 | b | 37.90 | a | 41.63 | ||||||||
1971 | 35.47 | a | 36.68 | 38.42 | 37.60 | 41.52 | b | 47.77 | 47.35 | 51.90 | 45.03 | 36.48 | f | 38.57 | 34.84 | 41.38 | a | |||||||||
1972 | 35.45 | 39.76 | 42.23 | 37.17 | 42.13 | 46.43 | 50.29 | 48.00 | a | 44.73 | 42.93 | a | 40.97 | 33.87 | 42.00 | |||||||||||
1973 | 35.32 | 38.78 | a | 36.23 | 37.63 | 43.93 | a | 46.31 | a | 45.55 | 47.03 | 47.63 | 38.78 | d | 42.90 | a | 41.89 | c | 41.83 | |||||||
1974 | 35.18 | c | 36.29 | 40.61 | 38.83 | 40.58 | 44.14 | b | 48.16 | 48.83 | a | 44.85 | c | 37.87 | 39.03 | 38.58 | 41.08 | |||||||||
1975 | 35.94 | 37.86 | 37.32 | 36.00 | a | 41.58 | 45.30 | 48.86 | b | 46.68 | 46.48 | a | 42.22 | d | 37.50 | 38.68 | 41.20 | |||||||||
1976 | 36.65 | 36.41 | 35.41 | b | 36.86 | a | 40.63 | a | 42.77 | 49.71 | 50.94 | 46.72 | a | 41.88 | e | 41.59 | c | 31.83 | b | 40.95 | ||||||
1977 | 34.03 | b | 38.50 | 35.30 | a | 37.50 | 41.16 | 47.23 | 44.10 | b | 51.61 | 47.87 | 44.63 | a | 40.00 | 42.65 | e | 42.05 | ||||||||
1978 | 42.14 | b | 41.71 | 42.65 | 40.41 | a | 41.31 | b | 50.17 | 50.58 | 48.17 | a | 48.03 | 44.10 | 33.32 | b | 31.16 | 42.81 | ||||||||
1979 | 32.93 | b | 40.18 | 40.16 | 41.00 | 43.03 | ----- | z | 49.81 | 49.06 | 50.07 | 48.74 | 41.10 | 38.23 | 43.12 | a | ||||||||||
1980 | 36.77 | a | 42.21 | 36.74 | 40.03 | ----- | z | 46.24 | a | ----- | z | ----- | z | 45.59 | a | 43.35 | 40.27 | 40.45 | 41.29 | c | ||||||
1981 | 41.84 | 39.32 | 38.71 | 40.50 | 43.19 | 45.50 | 47.06 | 49.61 | 46.60 | 42.94 | 43.33 | 43.81 | 43.53 | |||||||||||||
1982 | 33.90 | 36.46 | 37.03 | 38.48 | a | 38.55 | 47.50 | 50.00 | 48.65 | 43.93 | 41.65 | 39.47 | 39.00 | a | 41.22 | |||||||||||
1983 | 39.67 | g | 43.46 | b | 43.00 | 38.20 | 43.45 | 45.97 | 49.74 | ----- | z | 47.73 | 46.10 | 43.20 | 41.10 | 44.19 | b | |||||||||
1984 | 37.06 | 38.45 | 40.94 | 38.93 | 42.83 | a | 44.33 | 45.74 | 49.87 | 43.67 | 42.16 | 41.63 | 35.23 | 41.74 | ||||||||||||
1985 | 34.13 | 36.32 | 35.48 | 41.80 | 40.45 | 45.76 | a | 49.42 | 47.45 | 45.13 | 41.53 | a | ----- | z | 36.68 | c | 41.29 | a | ||||||||
1986 | 42.06 | 44.00 | 41.77 | ----- | z | 42.65 | 49.17 | a | 46.45 | 49.87 | 45.00 | a | 44.32 | ----- | z | 38.82 | c | 44.41 | b | |||||||
1987 | 36.06 | 39.07 | a | 39.26 | 41.08 | d | 44.40 | a | 46.00 | a | 48.03 | ----- | z | ----- | z | 45.97 | ----- | z | ----- | z | 42.48 | d | ||||
1988 | 36.48 | ----- | z | 33.21 | b | ----- | z | 41.00 | b | 47.23 | 47.43 | c | 47.19 | 44.30 | c | 45.41 | d | 40.65 | d | 34.37 | d | 41.73 | b | |||
1989 | 34.80 | a | 31.35 | e | 41.38 | b | 42.33 | 43.29 | 46.71 | b | 48.52 | 49.00 | a | 45.27 | 41.81 | d | 39.13 | 36.39 | h | 42.15 | a | |||||
1990 | 38.10 | b | 32.60 | c | 39.60 | f | 38.82 | b | 35.37 | a | 43.03 | a | 51.07 | a | 50.15 | d | 48.83 | f | 38.13 | 34.70 | 27.92 | e | 38.99 | b | ||
1991 | 32.36 | f | 39.96 | c | 34.30 | h | 38.07 | b | 40.93 | b | 40.76 | a | 47.87 | a | 51.87 | a | 42.90 | 40.68 | 38.62 | a | 34.16 | 41.58 | b | |||
1992 | 36.77 | 41.10 | 40.77 | 42.45 | a | 43.48 | 48.77 | 50.74 | d | 47.55 | b | 42.62 | a | 42.67 | a | 38.04 | b | 33.78 | d | 42.40 | ||||||
1993 | 35.71 | 37.04 | 43.23 | a | 41.10 | 45.65 | 44.31 | a | 45.45 | 47.81 | e | 44.25 | b | 44.08 | f | 32.38 | a | 36.11 | d | 41.18 | a | |||||
1994 | 38.43 | a | 37.04 | c | 37.74 | 40.13 | 44.97 | b | 44.07 | b | 46.70 | a | 46.10 | 45.60 | 37.14 | b | 33.59 | h | 35.54 | g | 41.79 | b | ||||
1995 | 43.60 | f | 42.00 | c | 40.88 | f | 36.48 | a | 43.76 | b | 45.52 | c | 50.55 | b | 44.38 | b | 47.86 | b | 38.38 | b | 38.63 | k | 41.22 | m | 43.62 | d |
1996 | 39.70 | d | 41.20 | i | 39.37 | l | 42.75 | f | 42.77 | i | 46.68 | h | 50.21 | c | 47.59 | i | 44.28 | e | 44.80 | k | 42.65 | j | 39.10 | j | 44.73 | i |
1997 | 34.46 | e | 32.38 | g | 38.33 | j | 36.76 | i | 43.00 | i | 41.83 | l | 48.22 | d | 48.96 | d | 50.79 | k | 44.62 | o | 46.62 | d | 37.79 | l | 44.57 | h |
1998 | 43.29 | q | ----- | z | ----- | z | 45.75 | v | 46.71 | g | 49.60 | e | 52.19 | 49.67 | a | 44.81 | c | 39.66 | b | 40.56 | c | 31.04 | e | 43.93 | e | |
1999 | 35.90 | a | ----- | z | 36.14 | c | 35.23 | d | ----- | z | 43.50 | b | 48.43 | h | 51.88 | e | 44.15 | d | 40.93 | a | 42.67 | f | 34.70 | a | 40.31 | d |
2000 | 32.93 | d | 39.04 | d | 33.53 | a | 42.59 | a | 43.86 | c | 47.10 | j | 50.62 | b | 47.55 | 46.34 | a | ----- | z | ----- | z | ----- | z | 42.06 | d | |
2001 | 34.48 | b | ----- | z | ----- | z | ----- | z | ----- | z | 42.83 | a | 50.35 | 49.96 | d | 44.89 | c | 44.69 | r | 41.93 | c | 39.78 | d | 43.46 | e | |
2002 | 35.80 | a | 35.68 | 33.54 | c | 38.96 | b | 40.03 | b | 44.62 | a | 48.59 | b | 45.75 | c | 44.83 | a | 38.31 | b | 39.00 | c | 39.85 | e | 40.41 | ||
2003 | 44.26 | d | 35.14 | 39.44 | d | 40.30 | c | 40.57 | a | 46.71 | b | 48.03 | a | 50.03 | a | 45.74 | g | 43.87 | a | ----- | z | 40.39 | h | 43.15 | c | |
2004 | 38.70 | d | 37.46 | e | 39.52 | d | 39.73 | 43.63 | a | 47.23 | d | 49.81 | ----- | z | 44.53 | 43.00 | d | ----- | z | ----- | z | 42.62 | c | |||
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.68 | 43.57 | 41.00 | i | 39.64 | e | 37.52 | f | 43.63 | i | ||
2006 | 38.57 | h | 34.41 | a | 35.69 | e | 39.50 | 42.58 | 47.70 | c | 48.62 | b | 46.33 | a | 43.21 | a | 40.23 | e | ----- | z | 37.17 | h | 42.03 | c | ||
2007 | 30.17 | h | 37.72 | c | 36.74 | d | 37.50 | 42.54 | c | 45.44 | l | ----- | z | ----- | z | ----- | z | 40.24 | n | 35.65 | m | 32.10 | b | 37.32 | g | |
2008 | 33.43 | c | 34.81 | c | 34.32 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.19 | i |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | 45.27 | a | 50.17 | 49.97 | b | 49.29 | 47.56 | e | 41.90 | b | 37.79 | f | 34.31 | e | 45.49 | e | ||
2010 | 43.76 | j | 40.68 | i | 37.05 | k | 39.17 | g | 38.58 | e | 45.78 | g | 40.05 | i | 48.59 | d | 46.04 | f | 45.12 | g | 37.29 | i | 34.61 | h | 43.58 | j |
2011 | 32.20 | a | 31.93 | 39.48 | b | 34.00 | f | 41.38 | g | 44.81 | i | 46.52 | b | 42.62 | b | ----- | z | ----- | z | 35.61 | b | ----- | z | 38.06 | f | |
2012 | ----- | z | 30.71 | e | ----- | z | ----- | z | ----- | z | 45.41 | c | 51.08 | f | 49.75 | c | 43.48 | a | 45.52 | h | ----- | z | ----- | z | 42.34 | h |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.60 | 37.73 | 38.18 | 39.61 | 42.84 | 46.48 | 48.75 | 48.85 | 46.16 | 43.09 | 40.34 | 37.51 | 42.33 | |||||||||||||
S.D. | 3.00 | 3.13 | 2.50 | 2.01 | 2.13 | 2.10 | 1.80 | 2.08 | 2.14 | 2.67 | 2.96 | 3.29 | 0.96 | |||||||||||||
SKEW | 0.19 | 0.17 | 0.05 | -0.52 | -0.56 | -0.01 | -0.24 | -0.34 | 0.13 | -0.07 | -0.43 | -0.41 | 0.45 | |||||||||||||
MAX | 44.26 | 45.11 | 43.23 | 43.21 | 47.35 | 51.00 | 53.27 | 54.65 | 50.26 | 49.61 | 46.62 | 43.84 | 44.95 | |||||||||||||
MIN | 28.06 | 30.71 | 33.21 | 34.80 | 35.37 | 40.76 | 44.10 | 42.62 | 41.43 | 37.14 | 32.38 | 27.92 | 40.41 | |||||||||||||
YRS | 64 | 66 | 64 | 63 | 65 | 67 | 68 | 69 | 68 | 63 | 59 | 60 | 39 |