YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1916 | 37.64 | q | 46.00 | e | 48.94 | 52.40 | 56.55 | 58.20 | ----- | z | 73.80 | a | 72.53 | 63.26 | 56.50 | ----- | z | 58.69 | c | |||||||
1917 | ----- | z | ----- | z | ----- | z | 46.39 | g | 48.30 | u | 71.33 | l | 73.65 | 71.61 | 67.73 | 59.97 | 49.40 | 43.16 | 60.92 | f | ||||||
1918 | 37.74 | 40.79 | 46.74 | 50.30 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.89 | h | ||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.65 | 40.65 | k | |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | 46.26 | b | 53.65 | 52.69 | q | 67.84 | 72.90 | 80.55 | 78.00 | 74.00 | 63.10 | ----- | z | 45.16 | 64.61 | c | ||||||||
1929 | 42.74 | 44.07 | 48.55 | 54.63 | ----- | z | 74.17 | 81.63 | a | 78.52 | 72.70 | 65.32 | 49.83 | 48.13 | 60.03 | a | ||||||||||
1930 | 43.73 | a | 50.12 | b | 49.73 | a | 59.17 | 60.29 | 73.40 | 79.55 | 78.19 | 70.97 | 59.10 | 50.34 | a | 42.87 | 59.79 | |||||||||
1931 | 42.19 | 48.32 | 50.77 | 59.85 | c | 68.84 | 76.37 | 82.58 | 77.81 | 73.63 | 62.71 | 48.81 | d | 41.65 | 61.13 | |||||||||||
1932 | 38.48 | 47.30 | b | 49.87 | 57.93 | a | 68.26 | 71.67 | 79.71 | 79.06 | 73.17 | 61.37 | a | 53.20 | 41.37 | a | 60.12 | |||||||||
1933 | 40.13 | a | 38.63 | a | 49.23 | 53.36 | b | 60.52 | 75.20 | 83.10 | 80.00 | 75.62 | a | 65.61 | 53.53 | 45.15 | d | 60.01 | ||||||||
1934 | 42.52 | ----- | z | 55.52 | 62.07 | 70.55 | 68.82 | b | 81.90 | 78.83 | b | 72.79 | a | 64.35 | 53.45 | a | 44.13 | 63.17 | a | |||||||
1935 | 43.65 | 45.39 | 45.86 | c | 52.03 | 58.26 | 77.43 | 81.58 | 80.90 | 72.10 | 61.77 | 45.30 | ----- | z | 60.39 | a | ||||||||||
1936 | ----- | z | ----- | z | ----- | z | 56.93 | 72.87 | 80.40 | 84.06 | 82.48 | ----- | z | ----- | z | ----- | z | ----- | z | 75.35 | g | |||||
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 | ----- | 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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | 42.64 | c | 46.39 | 56.04 | c | 57.13 | a | 72.80 | 77.68 | 73.00 | 67.70 | 58.29 | 48.13 | 42.26 | 58.37 | a | ||||||||
1960 | 37.19 | 39.03 | 50.06 | 51.83 | 59.45 | 74.13 | 76.13 | 75.10 | 71.47 | 57.27 | a | 48.90 | 39.97 | 56.71 | ||||||||||||
1961 | 43.55 | 43.86 | 45.35 | 51.90 | a | 59.06 | 71.47 | 76.71 | 74.94 | 66.80 | 56.13 | 45.63 | 42.32 | 56.48 | ||||||||||||
1962 | 39.77 | 43.04 | 41.35 | 56.50 | 58.00 | 67.40 | 74.13 | 76.55 | 70.10 | 59.10 | 51.13 | 44.32 | 56.78 | |||||||||||||
1963 | 37.40 | a | 47.15 | a | 45.71 | 50.03 | 63.42 | 65.17 | 77.35 | 73.42 | 71.77 | 62.52 | 49.57 | 40.74 | 57.02 | |||||||||||
1964 | 36.55 | 37.38 | 42.84 | 50.93 | 58.29 | 66.63 | 78.06 | 72.19 | 68.73 | 62.19 | 44.77 | 40.19 | 54.90 | |||||||||||||
1965 | 42.77 | 41.11 | 43.81 | 51.07 | 55.84 | 61.87 | 76.71 | 74.03 | 65.07 | 60.13 | 51.57 | 43.06 | 55.59 | |||||||||||||
1966 | 37.61 | 37.04 | 48.06 | 53.53 | 61.87 | 70.37 | 77.61 | 75.10 | 69.50 | 57.10 | a | 48.53 | 38.90 | a | 56.27 | |||||||||||
1967 | 37.06 | 40.32 | 43.84 | 45.57 | 58.06 | 63.90 | 74.94 | 74.74 | 69.07 | 58.19 | 50.80 | 37.13 | 54.47 | |||||||||||||
1968 | 39.71 | 46.45 | 46.52 | 49.27 | 57.35 | 68.47 | 73.13 | 69.32 | ----- | z | 58.19 | ----- | z | 37.10 | 54.55 | b | ||||||||||
1969 | 43.61 | 40.86 | 40.90 | 51.70 | 61.16 | 66.10 | 76.13 | 78.68 | 71.23 | 56.00 | 46.50 | 40.35 | 56.10 | |||||||||||||
1970 | 37.94 | 45.46 | 44.23 | 45.00 | 58.52 | 70.17 | a | 77.97 | a | 76.77 | 64.63 | 52.81 | 46.28 | a | 40.97 | 55.06 | ||||||||||
1971 | 38.90 | a | 39.75 | 46.39 | 49.10 | 55.48 | 67.40 | 77.74 | 73.00 | 69.07 | 52.40 | a | 45.23 | 38.06 | 54.38 | |||||||||||
1972 | 37.84 | 43.83 | 52.90 | 53.30 | 60.50 | a | 70.43 | 77.45 | 73.55 | 68.23 | 57.77 | 42.83 | 38.60 | a | 56.44 | |||||||||||
1973 | 37.16 | 42.64 | 40.67 | a | 46.33 | 60.48 | 68.73 | 75.42 | 75.55 | 66.53 | 58.00 | 45.67 | 39.84 | 54.75 | ||||||||||||
1974 | 38.77 | 38.71 | 47.23 | 49.40 | 58.58 | 72.67 | 74.27 | a | 69.97 | 66.73 | 59.61 | 46.17 | 34.74 | 54.74 | ||||||||||||
1975 | 37.13 | 39.32 | 41.32 | 44.30 | 58.97 | 64.90 | 75.71 | 72.48 | 69.83 | 56.90 | 40.83 | 39.42 | 53.43 | |||||||||||||
1976 | 37.42 | 45.48 | 41.29 | 44.97 | 57.84 | 67.57 | 74.71 | 71.10 | ----- | z | 55.71 | 47.30 | ----- | z | 54.34 | b | ||||||||||
1977 | ----- | z | 41.46 | 39.45 | 49.70 | 53.39 | 70.33 | 76.58 | 75.16 | 72.10 | 61.45 | 50.00 | 44.58 | 57.66 | a | |||||||||||
1978 | 41.10 | 42.68 | 49.23 | 50.20 | 58.19 | 68.93 | 76.00 | 71.77 | 65.47 | 59.42 | 44.93 | 37.45 | 55.45 | |||||||||||||
1979 | 36.13 | 39.43 | 43.10 | 50.73 | 57.13 | 67.20 | 71.84 | 70.06 | ----- | z | ----- | z | 41.60 | 40.32 | 51.75 | b | ||||||||||
1980 | 41.71 | 46.48 | 44.48 | 51.90 | 55.29 | 68.13 | 76.53 | a | 69.33 | a | 64.07 | 54.52 | 47.03 | 45.13 | 55.38 | |||||||||||
1981 | 44.52 | 43.25 | 45.03 | 53.83 | 58.13 | 70.13 | 74.58 | 70.19 | 70.87 | 56.36 | f | 50.00 | f | 44.67 | a | 57.52 | b | |||||||||
1982 | 39.00 | 45.63 | a | 46.50 | a | 50.57 | 55.03 | a | 64.60 | 74.10 | 76.48 | b | 68.76 | a | 56.65 | 47.24 | a | 40.68 | 55.44 | |||||||
1983 | 41.03 | 43.86 | 45.61 | 46.67 | 57.90 | 65.13 | 73.48 | 73.53 | a | 71.50 | 59.58 | 47.30 | 42.68 | 55.69 | ||||||||||||
1984 | 41.52 | 41.48 | 48.61 | 51.33 | 63.71 | 66.73 | 74.45 | 73.42 | 69.53 | 53.68 | 45.67 | 42.17 | a | 56.03 | ||||||||||||
1985 | 39.40 | a | 40.89 | 45.26 | 54.97 | 59.79 | b | 69.43 | 76.58 | 75.00 | 63.33 | 59.03 | 45.76 | a | 41.97 | 55.95 | ||||||||||
1986 | 46.03 | 44.57 | 51.06 | 54.23 | 60.97 | 70.60 | 72.94 | 75.97 | 64.73 | 56.97 | 49.27 | 42.97 | 57.53 | |||||||||||||
1987 | 38.68 | 42.75 | 44.39 | 56.33 | 61.16 | 69.67 | 71.65 | 73.55 | 68.23 | 63.39 | 46.93 | a | 38.19 | 56.24 | ||||||||||||
1988 | 40.10 | 44.90 | 45.71 | 52.77 | 59.03 | 70.90 | 76.45 | 73.94 | 66.17 | 63.81 | 46.87 | 39.61 | 56.69 | |||||||||||||
1989 | 39.23 | 44.75 | 50.06 | 58.03 | 60.42 | 68.40 | 76.48 | 72.06 | 67.63 | 58.19 | 49.57 | 40.16 | 57.08 | |||||||||||||
1990 | 39.52 | 39.54 | 47.13 | 53.93 | 56.13 | 69.53 | 73.83 | a | 71.14 | b | 69.07 | 59.19 | 48.67 | 37.87 | a | 55.46 | ||||||||||
1991 | 41.29 | 47.32 | 42.87 | a | 49.47 | 55.71 | 65.03 | 73.33 | a | 74.77 | 68.00 | 60.32 | 46.33 | 43.26 | 55.64 | |||||||||||
1992 | 39.26 | 46.55 | 47.55 | 56.07 | 61.19 | 64.70 | 72.17 | a | 73.26 | 68.45 | a | 59.13 | 44.21 | a | 40.87 | 56.12 | ||||||||||
1993 | 43.80 | a | 44.32 | 47.71 | 53.03 | 60.87 | 67.67 | 71.90 | 72.65 | 67.73 | 58.29 | 46.00 | a | 40.10 | 56.17 | |||||||||||
1994 | 40.19 | 41.75 | 48.68 | 53.00 | 58.77 | 71.10 | 73.70 | a | 75.16 | 69.73 | 54.90 | a | 43.30 | 43.52 | 56.15 | |||||||||||
1995 | 41.77 | 48.32 | 47.63 | a | 48.57 | 55.26 | 64.63 | 73.90 | a | 75.81 | 69.20 | 59.10 | 52.10 | 42.77 | 56.59 | |||||||||||
1996 | 41.52 | 47.34 | 47.40 | a | 52.50 | f | 59.57 | a | 69.33 | ----- | z | ----- | z | ----- | z | ----- | z | 49.63 | ----- | z | 52.47 | f | ||||
1997 | ----- | z | ----- | z | ----- | z | ----- | z | 63.16 | 62.53 | 71.04 | e | 73.26 | 71.87 | 55.65 | 47.69 | a | 39.23 | 60.55 | d | ||||||
1998 | 41.87 | 40.32 | 44.81 | 45.86 | a | 54.83 | a | 60.36 | b | 74.68 | c | 76.31 | o | 67.97 | 56.23 | 47.63 | 39.32 | 52.17 | a | |||||||
1999 | 41.52 | 43.96 | 46.85 | d | 46.30 | 56.97 | 67.38 | a | 74.00 | a | 71.81 | o | 68.48 | a | 60.13 | a | 52.13 | 39.17 | a | 54.26 | a | |||||
2000 | 42.29 | 43.83 | 47.26 | 54.30 | 62.55 | b | 69.72 | e | 73.42 | 74.10 | 69.15 | j | 57.47 | a | 41.89 | b | 41.30 | a | 55.28 | a | ||||||
2001 | 39.03 | 39.89 | 46.64 | f | 50.79 | a | 64.04 | c | 70.21 | a | 74.85 | d | 74.19 | 71.11 | b | 60.71 | 50.80 | 37.71 | 57.58 | a | ||||||
2002 | 39.57 | a | 42.25 | 45.21 | b | 54.86 | a | 58.73 | a | 70.48 | a | 76.45 | 75.35 | 70.90 | 58.07 | a | 50.68 | e | 41.10 | 56.97 | ||||||
2003 | 47.81 | 45.07 | 47.97 | 49.27 | 62.52 | 70.07 | 80.10 | 77.55 | 72.60 | 64.97 | 46.93 | a | 42.29 | 58.93 | ||||||||||||
2004 | 43.71 | 40.66 | 53.61 | 53.20 | 62.35 | 69.47 | 75.61 | 73.97 | 69.70 | 57.50 | a | 45.21 | b | 42.48 | 57.29 | |||||||||||
2005 | 44.97 | 46.46 | 46.78 | d | 52.63 | 61.90 | 67.89 | b | 76.77 | 74.28 | f | 69.34 | a | 58.48 | b | 49.80 | 42.19 | d | 56.11 | a | ||||||
2006 | 40.97 | 44.31 | b | 45.97 | 53.31 | a | 63.57 | a | 72.30 | 80.26 | 75.77 | 67.67 | 58.00 | 49.87 | 39.06 | 57.59 | ||||||||||
2007 | 38.83 | a | 43.54 | 50.87 | a | 53.41 | a | 64.30 | h | 71.60 | 78.47 | a | 79.26 | 70.83 | a | 58.60 | a | 54.87 | 39.58 | 58.17 | a | |||||
2008 | 39.00 | 42.00 | 45.90 | 51.77 | 58.52 | 71.43 | 77.26 | 76.50 | a | 71.07 | ----- | z | 50.80 | 42.19 | 56.95 | a | ||||||||||
2009 | 43.90 | 43.61 | 48.84 | 51.80 | 66.58 | 69.30 | 79.63 | a | 76.42 | 72.00 | 57.03 | 51.87 | 39.68 | 58.39 | ||||||||||||
2010 | 43.74 | 43.43 | 44.68 | 50.73 | 58.74 | 68.80 | 78.06 | 75.61 | 71.05 | j | 60.55 | 46.17 | 46.32 | 56.08 | a | |||||||||||
2011 | 39.71 | 37.89 | 48.94 | 53.90 | 57.45 | 69.30 | 77.68 | 81.16 | 73.37 | 62.39 | 47.30 | 39.81 | 57.41 | |||||||||||||
2012 | 43.45 | 42.59 | 47.87 | 56.40 | 63.81 | 72.47 | 77.61 | 78.03 | 72.17 | 61.03 | 53.80 | 39.90 | 59.09 | |||||||||||||
2013 | 39.13 | 38.86 | 49.55 | 54.63 | 60.10 | 71.23 | 74.17 | g | 77.66 | b | 69.31 | d | 55.81 | 50.83 | 41.26 | 55.31 | a | |||||||||
2014 | 44.10 | 48.11 | 51.13 | 55.27 | 61.71 | 70.80 | 77.55 | 73.23 | 71.67 | 63.13 | 50.20 | 45.32 | 59.35 | |||||||||||||
2015 | 44.61 | 49.82 | 54.81 | 54.50 | 59.81 | 75.07 | 75.32 | 78.29 | 72.97 | 62.74 | 46.43 | 41.26 | 59.64 | |||||||||||||
2016 | 42.19 | 48.21 | e | 51.35 | 56.27 | 59.90 | 75.17 | 79.00 | 73.42 | 69.47 | 63.19 | 52.10 | 45.35 | 59.64 | ||||||||||||
2017 | 42.81 | 47.54 | 51.35 | 55.23 | 61.13 | 73.54 | b | 77.97 | 76.10 | 68.57 | 59.90 | k | 55.17 | 44.45 | 59.44 | a | ||||||||||
2018 | 45.35 | 43.89 | 48.84 | 57.97 | 62.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.80 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 40.86 | 43.45 | 47.17 | 52.46 | 60.19 | 69.42 | 76.51 | 75.03 | 69.64 | 59.28 | 48.41 | 41.34 | 56.80 | |||||||||||||
S.D. | 2.67 | 3.17 | 3.43 | 3.74 | 3.78 | 3.91 | 2.93 | 2.94 | 2.65 | 3.07 | 3.35 | 2.56 | 1.78 | |||||||||||||
SKEW | 0.27 | -0.02 | 0.09 | -0.09 | 1.08 | -0.14 | 0.45 | 0.24 | -0.26 | 0.06 | 0.09 | 0.15 | 0.63 | |||||||||||||
MAX | 47.81 | 50.12 | 55.52 | 62.07 | 72.87 | 80.40 | 84.06 | 82.48 | 75.62 | 65.61 | 56.50 | 48.13 | 61.13 | |||||||||||||
MIN | 36.13 | 37.04 | 39.45 | 44.30 | 53.39 | 58.20 | 71.04 | 69.32 | 63.33 | 52.40 | 40.83 | 34.74 | 53.43 | |||||||||||||
YRS | 65 | 68 | 68 | 68 | 68 | 69 | 67 | 66 | 63 | 64 | 66 | 66 | 45 |