YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1927 | ----- | z | 37.58 | p | 35.87 | 37.00 | a | ----- | z | 50.33 | 52.94 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.03 | h | |||
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 37.86 | a | ----- | z | 37.86 | k |
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 | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.07 | a | 48.13 | 41.26 | 34.73 | 35.23 | a | 41.48 | g | |||
1958 | 37.48 | 40.21 | 34.32 | 37.14 | a | 45.55 | 52.93 | a | 52.58 | 49.42 | 46.60 | 41.94 | 34.97 | a | 38.52 | b | 42.64 | |||||||||
1959 | 34.29 | 34.96 | 35.39 | 37.33 | 39.48 | 46.50 | 49.77 | 46.93 | b | 46.90 | 41.60 | a | 35.03 | 33.65 | 40.15 | |||||||||||
1960 | 33.52 | 33.86 | a | 34.03 | 39.80 | 43.94 | 47.17 | a | 49.00 | 52.23 | 45.97 | 44.00 | 37.43 | 35.16 | 41.34 | |||||||||||
1961 | 36.77 | 36.71 | 34.90 | 36.82 | b | 40.71 | 45.83 | 49.52 | 49.84 | 42.67 | 36.41 | b | 30.37 | 32.81 | 39.45 | |||||||||||
1962 | 28.79 | b | 34.79 | 31.14 | b | 38.87 | 39.40 | a | 43.69 | a | 46.34 | b | 49.65 | 46.67 | 42.52 | 38.13 | 35.19 | 39.60 | ||||||||
1963 | 27.90 | 37.86 | 33.37 | a | 38.43 | 38.81 | 45.03 | a | 48.55 | b | 49.71 | 47.80 | 43.80 | a | 37.23 | 34.84 | 40.28 | |||||||||
1964 | 33.55 | 30.46 | a | 32.73 | a | 33.80 | 37.06 | 45.17 | 47.58 | 47.26 | 43.47 | 38.19 | 33.55 | a | ----- | z | 38.44 | a | ||||||||
1965 | 30.68 | 33.29 | 29.87 | 35.48 | a | ----- | z | ----- | z | 46.87 | ----- | z | ----- | z | ----- | z | ----- | z | 32.71 | 34.82 | f | |||||
1966 | 31.31 | b | 31.78 | a | 33.32 | 36.70 | 38.61 | 44.83 | 48.52 | 47.52 | 47.80 | 39.87 | 37.57 | 37.59 | b | 39.62 | ||||||||||
1967 | 35.61 | 33.43 | 32.60 | a | 33.03 | 40.52 | 48.07 | a | 47.42 | 49.90 | a | 47.60 | 43.40 | a | 36.23 | 32.39 | 40.02 | |||||||||
1968 | 31.97 | 32.90 | 36.13 | 34.83 | 41.17 | b | 44.87 | 48.65 | 49.77 | 46.14 | a | 39.42 | 37.00 | a | 29.74 | 39.38 | ||||||||||
1969 | 25.17 | b | 28.64 | 30.80 | a | 37.00 | 41.87 | a | 50.67 | 47.39 | 47.16 | 46.63 | 37.42 | 36.37 | 35.61 | 38.73 | ||||||||||
1970 | 34.14 | b | 32.93 | 32.06 | 33.73 | 38.19 | 45.10 | 47.58 | 47.33 | a | 42.31 | a | 37.42 | 35.03 | 30.83 | b | 38.06 | |||||||||
1971 | 31.60 | a | 32.15 | b | 30.03 | 34.24 | a | 41.00 | 43.30 | 47.61 | 50.06 | 42.38 | a | 37.29 | 37.37 | 30.35 | 38.12 | |||||||||
1972 | 28.03 | 31.07 | 35.35 | 32.97 | 41.58 | 46.00 | 48.52 | 49.35 | 42.00 | a | 35.77 | 36.57 | 28.93 | a | 38.01 | |||||||||||
1973 | 30.40 | a | 31.29 | 33.77 | 34.93 | 39.68 | 45.45 | a | 47.67 | a | 46.58 | 45.57 | 39.13 | 32.60 | 35.61 | 38.56 | ||||||||||
1974 | 28.52 | 32.93 | 33.13 | 36.73 | 38.13 | 44.87 | 47.68 | 49.48 | 46.30 | 37.65 | 36.43 | 34.35 | 38.85 | |||||||||||||
1975 | 31.03 | 30.14 | 30.55 | 31.70 | 38.84 | 43.93 | a | 49.16 | 48.45 | 43.13 | 40.74 | 35.87 | 31.97 | 37.96 | ||||||||||||
1976 | 32.03 | 30.34 | 30.16 | 34.00 | 39.61 | 42.17 | 47.35 | 49.94 | 47.50 | 39.10 | 34.53 | 33.42 | 38.35 | |||||||||||||
1977 | 28.84 | 33.93 | 31.48 | 35.43 | 38.58 | 45.77 | 46.32 | 51.39 | 44.90 | 38.35 | 32.50 | 33.32 | 38.40 | |||||||||||||
1978 | 36.19 | 36.86 | 35.77 | 37.63 | 39.16 | 47.87 | 49.61 | 50.48 | 47.33 | 40.26 | 31.43 | 28.06 | 40.06 | |||||||||||||
1979 | 26.35 | 32.36 | 34.55 | 37.23 | 42.16 | 44.67 | 49.39 | 51.06 | 48.93 | 42.23 | a | 33.53 | 36.32 | 39.90 | ||||||||||||
1980 | 26.52 | 34.24 | 33.52 | 37.27 | 41.42 | 45.23 | 49.90 | 49.00 | 47.17 | 39.45 | 38.40 | 37.68 | 39.98 | |||||||||||||
1981 | 34.65 | 33.79 | 34.42 | 37.03 | 41.87 | 45.76 | a | 49.63 | a | 51.42 | 46.37 | 38.71 | 37.23 | 33.13 | 40.33 | |||||||||||
1982 | 30.45 | 32.39 | 31.94 | 33.00 | 39.37 | a | 47.87 | 49.16 | 49.65 | 47.67 | 40.81 | 32.53 | 32.23 | 38.92 | ||||||||||||
1983 | 36.06 | 35.48 | a | 37.23 | 35.20 | 43.81 | 47.13 | 50.39 | 51.00 | 42.87 | 37.07 | a | 39.83 | a | 27.67 | a | 40.31 | |||||||||
1984 | 33.32 | 33.79 | a | 36.48 | 35.34 | a | 39.23 | 45.83 | a | 47.16 | 47.58 | 43.97 | 39.42 | 36.60 | 29.39 | 39.01 | ||||||||||
1985 | 29.52 | 31.11 | 31.71 | 37.47 | 41.58 | 44.80 | 49.71 | 49.06 | 46.33 | 42.13 | 29.60 | 28.45 | 38.46 | |||||||||||||
1986 | 37.11 | c | 33.71 | 39.61 | 36.60 | 43.48 | 48.67 | 49.48 | 52.58 | 47.55 | a | 44.87 | 38.34 | a | 35.13 | a | 42.26 | |||||||||
1987 | 34.42 | 36.82 | 37.32 | 39.33 | 43.45 | 46.80 | 49.87 | 50.19 | 47.83 | 40.87 | 40.40 | 32.03 | a | 41.61 | ||||||||||||
1988 | 32.68 | 36.17 | 34.03 | 39.00 | a | 42.13 | 45.40 | 49.68 | 50.16 | 46.07 | 47.13 | 39.17 | a | 35.03 | a | 41.39 | ||||||||||
1989 | 34.03 | 26.52 | a | 34.74 | 39.63 | 43.32 | 47.70 | 49.97 | 51.13 | 46.83 | 43.16 | 39.90 | 36.83 | a | 41.15 | |||||||||||
1990 | 36.00 | a | 29.56 | a | 35.74 | 41.00 | b | 43.39 | 48.63 | 52.32 | 53.42 | 51.60 | 40.71 | 39.39 | b | 28.35 | 41.68 | |||||||||
1991 | 32.35 | 38.04 | 34.13 | 37.70 | 43.00 | 46.33 | 51.52 | 52.29 | 48.47 | 40.94 | 40.00 | a | 37.48 | 41.85 | ||||||||||||
1992 | 36.62 | b | 38.76 | 39.32 | 40.38 | a | 43.74 | 50.63 | 52.39 | 51.52 | 46.53 | 44.81 | 37.90 | 32.00 | a | 42.88 | ||||||||||
1993 | 27.87 | a | 31.07 | a | 36.13 | 41.27 | 47.65 | 48.03 | 50.19 | 51.77 | 46.07 | 44.74 | 32.70 | 34.58 | 41.01 | |||||||||||
1994 | 38.13 | a | 32.86 | 37.29 | 41.23 | 43.94 | 46.20 | 49.60 | a | 51.19 | 50.40 | 40.84 | 33.73 | 34.38 | b | 41.65 | ||||||||||
1995 | 36.29 | 36.71 | 35.32 | 37.73 | 44.32 | 47.57 | 52.58 | 49.39 | 51.93 | 42.26 | 40.67 | 36.29 | 42.59 | |||||||||||||
1996 | 35.13 | 32.66 | 36.90 | 41.30 | 40.87 | 45.97 | 51.00 | 51.26 | 47.13 | 41.94 | 37.13 | 33.20 | a | 41.21 | ||||||||||||
1997 | 34.80 | a | 34.43 | 36.45 | 37.63 | 45.29 | 47.60 | 50.26 | 53.10 | 49.83 | 43.81 | 40.23 | 34.52 | 42.33 | ||||||||||||
1998 | 36.13 | a | 37.61 | 37.81 | 37.37 | 45.13 | 48.77 | 54.32 | 50.45 | 47.77 | 43.06 | 40.63 | 32.47 | a | 42.63 | |||||||||||
1999 | 36.77 | 33.68 | 34.35 | 35.13 | 39.10 | 47.07 | 49.06 | 52.58 | 45.30 | 41.32 | 40.33 | 35.90 | a | 40.88 | ||||||||||||
2000 | 31.84 | 35.10 | 35.84 | 40.20 | 43.30 | a | 47.27 | 50.81 | 50.15 | d | 47.88 | f | 42.73 | a | 34.46 | d | 34.16 | 40.53 | a | |||||||
2001 | 35.33 | a | 31.73 | b | 35.90 | 38.12 | e | 40.54 | g | 45.33 | c | 48.50 | g | 51.96 | c | 48.04 | d | 41.48 | h | 39.22 | c | 32.96 | f | 40.71 | d | |
2002 | 35.69 | e | 33.69 | b | 32.33 | j | 36.93 | o | 40.79 | g | 47.95 | i | 51.81 | d | 49.44 | d | 46.93 | 41.55 | 38.93 | b | 35.82 | c | 41.73 | d | ||
2003 | 38.68 | 33.36 | 38.61 | 38.60 | 41.42 | 48.20 | 49.05 | j | 45.65 | e | 47.07 | 46.45 | 33.72 | a | 34.48 | 40.57 | a | |||||||||
2004 | 34.90 | b | 35.32 | a | 37.00 | b | 38.83 | g | 41.23 | e | 43.65 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.11 | h |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 32.97 | 33.65 | 34.54 | 37.01 | 41.50 | 46.60 | 49.49 | 49.95 | 46.59 | 41.03 | 36.46 | 33.51 | 40.24 | |||||||||||||
S.D. | 3.46 | 2.75 | 2.47 | 2.43 | 2.39 | 2.10 | 1.87 | 1.82 | 2.26 | 2.67 | 2.89 | 2.78 | 1.51 | |||||||||||||
SKEW | -0.46 | 0.04 | -0.10 | -0.10 | 0.32 | 0.67 | 0.47 | -0.28 | -0.10 | 0.10 | -0.43 | -0.46 | 0.12 | |||||||||||||
MAX | 38.68 | 40.21 | 39.61 | 41.30 | 47.65 | 52.93 | 54.32 | 53.42 | 51.93 | 47.13 | 40.67 | 38.52 | 42.88 | |||||||||||||
MIN | 25.17 | 26.52 | 29.87 | 31.70 | 37.06 | 42.17 | 46.32 | 45.65 | 42.00 | 35.77 | 29.60 | 27.67 | 37.96 | |||||||||||||
YRS | 47 | 47 | 47 | 46 | 44 | 45 | 45 | 46 | 45 | 45 | 47 | 45 | 40 |