YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | ----- | z | ----- | z | ----- | z | 49.78 | c | 58.58 | 61.40 | a | 68.03 | 67.35 | 55.88 | 50.84 | 42.90 | 36.60 | 54.60 | c | |||||||
1915 | 37.84 | 40.66 | 47.24 | 53.37 | 54.66 | 60.72 | a | 65.72 | v | 70.24 | n | 58.80 | 51.97 | 46.28 | 39.19 | 49.07 | b | |||||||||
1916 | 31.94 | 42.17 | 46.68 | 49.38 | 51.86 | b | 59.25 | 64.69 | 64.55 | a | 59.92 | 49.83 | a | 42.13 | ----- | z | 51.13 | a | ||||||||
1917 | 31.13 | a | 38.75 | 39.76 | 47.88 | b | 52.11 | 63.30 | 69.60 | 68.87 | 62.08 | 55.16 | 45.50 | 42.34 | 51.37 | |||||||||||
1918 | 39.97 | 39.86 | 43.70 | a | 48.86 | a | 53.15 | 66.20 | 64.98 | a | 65.74 | f | 61.93 | 53.52 | f | 43.15 | 35.09 | i | 51.31 | c | ||||||
1919 | 38.06 | 38.73 | 43.17 | a | 50.92 | ----- | z | 53.42 | 68.45 | 66.52 | 55.16 | k | 47.81 | 41.54 | b | 37.42 | l | 49.85 | c | |||||||
1920 | 40.44 | 40.60 | 41.72 | a | 47.22 | c | 54.05 | 60.97 | 65.92 | 70.56 | 61.15 | 50.29 | 44.13 | 35.94 | 51.08 | |||||||||||
1921 | 37.02 | 42.95 | 47.37 | 46.33 | 53.63 | 61.55 | 69.31 | 74.50 | v | ----- | z | ----- | z | 46.58 | 38.29 | 49.23 | c | |||||||||
1922 | 35.31 | 37.07 | 41.68 | 47.15 | 54.92 | 65.85 | 68.04 | c | 64.69 | 62.35 | 53.98 | 43.00 | 39.48 | a | 51.13 | |||||||||||
1923 | 38.68 | 42.50 | 45.48 | a | 50.53 | 54.63 | 59.82 | 68.97 | 67.26 | 62.12 | 52.85 | 47.85 | 35.32 | 52.17 | ||||||||||||
1924 | 36.26 | 46.78 | 43.44 | 53.55 | 62.74 | 63.08 | 68.29 | 67.24 | 60.12 | 52.47 | 45.10 | 34.98 | 52.84 | |||||||||||||
1925 | 40.52 | 41.00 | 46.68 | 51.48 | 57.02 | 63.93 | 71.95 | 66.31 | 56.93 | 49.98 | 42.75 | 39.11 | 52.31 | |||||||||||||
1926 | 38.13 | 42.59 | 49.54 | f | ----- | z | 55.73 | 67.02 | 69.68 | 66.68 | a | 58.50 | 55.27 | 49.18 | 40.23 | a | 54.30 | b | ||||||||
1927 | 40.68 | 41.55 | 44.69 | 51.55 | 57.38 | b | 65.33 | 70.78 | a | 67.48 | 58.58 | 54.18 | 47.75 | 37.94 | 53.16 | |||||||||||
1928 | 40.57 | a | 44.02 | 47.13 | 48.93 | 62.08 | a | 61.23 | 70.85 | 67.97 | 60.97 | 53.40 | 44.55 | a | 36.98 | a | 53.22 | |||||||||
1929 | 36.76 | 38.75 | 46.27 | 45.26 | a | 57.42 | 61.42 | 69.06 | 69.55 | 60.47 | 56.35 | 43.98 | c | 43.97 | 52.44 | |||||||||||
1930 | 35.03 | 45.32 | 47.71 | 51.28 | 53.15 | a | 63.07 | 70.29 | 67.85 | 61.45 | 54.68 | 45.83 | 38.18 | 52.82 | ||||||||||||
1931 | 40.37 | 44.86 | 47.73 | 53.63 | 61.85 | a | 61.28 | 71.26 | 68.68 | 59.52 | 52.13 | ----- | z | ----- | z | 56.13 | b | |||||||||
1932 | 35.19 | 39.45 | 46.97 | 47.22 | a | 55.02 | 66.42 | 65.98 | ----- | z | 63.63 | 51.40 | 47.90 | 34.77 | 50.36 | a | ||||||||||
1933 | 33.35 | 34.91 | 44.16 | 51.22 | 49.80 | a | 59.85 | 69.37 | 68.55 | a | 58.32 | 57.40 | 45.27 | 38.61 | 50.90 | |||||||||||
1934 | 42.76 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.76 | k | |
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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.17 | k | ----- | z |
1976 | 38.52 | k | 39.63 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.08 | j | ----- | z | ----- | z |
1980 | 38.98 | j | ----- | z | ----- | z | ----- | z | 55.11 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.48 | d | ----- | z | ----- | z | ----- | z | 64.48 | k |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.46 | f | ----- | z |
1996 | 40.13 | a | 44.72 | b | 47.77 | c | 49.91 | a | 54.24 | 63.21 | a | 73.80 | c | 69.80 | f | 61.43 | h | 53.92 | f | 45.80 | b | 40.22 | b | 51.09 | c | |
1997 | 39.02 | c | 43.15 | e | 47.44 | e | 49.52 | e | 60.09 | c | 61.00 | h | 69.55 | c | 69.48 | d | 63.25 | f | 52.50 | i | 47.66 | e | 37.79 | c | 51.52 | c |
1998 | 41.06 | f | 40.25 | f | 47.10 | g | 48.38 | d | 50.96 | h | 62.61 | g | 70.19 | e | 70.18 | f | 65.98 | h | 50.77 | g | 43.72 | e | 34.64 | i | 54.10 | i |
1999 | 39.72 | h | 37.64 | f | 41.43 | h | 48.00 | i | 55.10 | j | 61.27 | f | 66.67 | j | 66.06 | f | 63.56 | e | 55.81 | g | 46.81 | f | 39.16 | f | 63.56 | k |
2000 | 40.69 | e | 42.61 | g | 45.90 | g | 51.55 | j | 55.79 | l | 66.26 | g | 66.90 | f | 67.18 | f | 61.98 | d | 52.75 | g | 40.90 | d | 38.17 | b | 45.44 | h |
2001 | 37.44 | f | 38.95 | h | 48.58 | f | 46.29 | i | 60.28 | f | 61.27 | h | 68.76 | h | 69.48 | h | 63.96 | f | 55.98 | i | 45.38 | i | 38.70 | f | ----- | z |
2002 | 37.19 | j | 44.40 | h | 44.02 | f | 52.45 | j | 55.61 | i | 62.83 | f | 71.38 | f | 66.79 | 63.72 | l | 51.67 | g | 45.92 | j | 38.89 | h | 66.79 | k | |
2003 | 45.81 | 43.00 | 46.97 | 45.54 | c | 58.38 | f | 64.40 | i | 71.97 | 68.65 | h | 65.60 | a | 56.13 | 42.11 | b | 41.00 | a | 50.90 | c | |||||
2004 | 37.62 | a | 41.91 | a | 52.20 | a | 51.84 | a | 56.69 | 61.82 | k | 70.74 | f | 69.21 | b | 60.73 | f | 53.94 | 44.42 | e | 39.88 | a | 49.75 | c | ||
2005 | 38.89 | 42.80 | 47.93 | b | 48.20 | j | 55.43 | h | 59.04 | g | 70.22 | f | 69.89 | c | 57.54 | q | 53.50 | g | 44.32 | e | 36.82 | n | 48.77 | g | ||
2006 | 39.62 | c | 42.14 | f | 39.58 | m | 44.88 | r | ----- | z | ----- | z | 73.83 | g | 68.35 | 62.48 | a | 55.82 | t | ----- | z | ----- | z | 56.82 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.21 | 41.59 | 45.82 | 49.61 | 55.95 | 62.30 | 69.18 | 67.80 | 60.91 | 53.00 | 44.78 | 38.52 | 52.13 | |||||||||||||
S.D. | 3.22 | 2.77 | 2.71 | 2.43 | 3.46 | 3.09 | 2.26 | 1.58 | 2.40 | 2.51 | 2.19 | 2.35 | 0.87 | |||||||||||||
SKEW | -0.22 | -0.40 | -0.24 | -0.06 | 0.49 | -0.79 | -0.29 | -0.35 | -0.15 | -0.18 | 0.19 | 0.34 | -0.22 | |||||||||||||
MAX | 45.81 | 46.78 | 52.20 | 53.63 | 62.74 | 67.02 | 73.80 | 70.56 | 65.60 | 57.40 | 49.18 | 43.97 | 53.22 | |||||||||||||
MIN | 31.13 | 34.91 | 39.76 | 45.26 | 49.80 | 53.42 | 64.69 | 64.55 | 55.88 | 47.81 | 40.90 | 34.77 | 50.90 | |||||||||||||
YRS | 27 | 24 | 23 | 24 | 22 | 21 | 23 | 21 | 23 | 20 | 26 | 21 | 11 |