| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1914 | ----- | z | 35.64 | 43.74 | 45.95 | 54.06 | 55.52 | 67.13 | 67.42 | 55.95 | 49.89 | 42.08 | 24.03 | 49.22 | ||||||||||||
| 1915 | 31.72 | a | 37.32 | 42.31 | 49.50 | 51.11 | i | 56.28 | a | 62.73 | 69.36 | b | 51.73 | 50.35 | 39.25 | 35.23 | 47.80 | |||||||||
| 1916 | 28.66 | 40.74 | 45.15 | 48.65 | 47.82 | 56.57 | 62.60 | 63.60 | 58.30 | 45.72 | d | 36.77 | 28.18 | 46.90 | ||||||||||||
| 1917 | 23.73 | 32.25 | 30.02 | 41.97 | 48.53 | 57.83 | 69.18 | 66.50 | 60.17 | 49.98 | 42.68 | b | 41.79 | 47.05 | ||||||||||||
| 1918 | 36.02 | 33.43 | 40.26 | 42.58 | 48.79 | 65.67 | 66.74 | 60.47 | 58.95 | 49.00 | 36.88 | 29.94 | 47.39 | |||||||||||||
| 1919 | 30.73 | 31.14 | 36.85 | 47.75 | 55.56 | 60.07 | 68.53 | 68.21 | 56.75 | 41.00 | 35.42 | 26.05 | 46.51 | |||||||||||||
| 1920 | 34.82 | 32.33 | 37.11 | 41.48 | a | 49.21 | 56.77 | 65.05 | 64.92 | 58.15 | 45.26 | 36.85 | 32.66 | 46.22 | ||||||||||||
| 1921 | 30.15 | 35.98 | 43.03 | 44.28 | 49.18 | 59.53 | 64.37 | 65.63 | 52.77 | 50.32 | 41.82 | 33.31 | 47.53 | |||||||||||||
| 1922 | 22.56 | 27.88 | 33.53 | 40.00 | 51.65 | 62.35 | 68.44 | 64.92 | 60.75 | 48.81 | 34.40 | 33.00 | 45.69 | |||||||||||||
| 1923 | 32.63 | 31.39 | 38.29 | 46.10 | 50.89 | 54.58 | 65.03 | 64.97 | 58.37 | 44.55 | 37.72 | 30.81 | 46.28 | |||||||||||||
| 1924 | 29.58 | 40.57 | 35.63 | 45.72 | 56.24 | 59.33 | 66.69 | 62.77 | 59.53 | 46.40 | 38.47 | 25.27 | 47.18 | |||||||||||||
| 1925 | 35.52 | 39.32 | 41.63 | 46.77 | 54.32 | 59.23 | 69.55 | 64.58 | 55.62 | 46.29 | 39.02 | 34.73 | 48.88 | |||||||||||||
| 1926 | 31.15 | 40.55 | 42.71 | 51.42 | 52.85 | 64.45 | 65.71 | ----- | z | 51.92 | 51.73 | 44.67 | 31.66 | 48.07 | ||||||||||||
| 1927 | 34.18 | 35.23 | 39.56 | 43.32 | 48.81 | 59.32 | 66.15 | 63.92 | 54.10 | 49.77 | 42.98 | 27.98 | 47.11 | |||||||||||||
| 1928 | 37.24 | 36.21 | 42.61 | 43.18 | 56.42 | 57.35 | 67.50 | 63.65 | 58.38 | 47.05 | 39.05 | 28.39 | 48.09 | |||||||||||||
| 1929 | 27.98 | 29.48 | 40.63 | 40.57 | 52.02 | 57.60 | 67.02 | 69.16 | 51.95 | 49.16 | 36.23 | 38.69 | 46.71 | |||||||||||||
| 1930 | 19.27 | 41.09 | 39.90 | 49.48 | 49.53 | 58.37 | 66.85 | 65.92 | 56.03 | 47.06 | 36.73 | 28.61 | 46.57 | |||||||||||||
| 1931 | 34.50 | 34.36 | 41.56 | 46.37 | 58.58 | 59.17 | 70.08 | 68.63 | 55.52 | 46.98 | 34.20 | 30.42 | a | 48.36 | ||||||||||||
| 1932 | 28.40 | a | 30.10 | 40.50 | 44.22 | 50.81 | 60.09 | a | 63.90 | 61.60 | 57.42 | 46.90 | a | 44.22 | a | 22.63 | 45.90 | |||||||||
| 1933 | 27.77 | 25.68 | 38.13 | 43.20 | 45.82 | 59.55 | 67.95 | b | 64.74 | 55.63 | 51.74 | 39.28 | 40.16 | 46.64 | ||||||||||||
| 1934 | 37.85 | 39.20 | 47.58 | 51.15 | 56.69 | 57.27 | 67.29 | 67.40 | 56.85 | 51.32 | 42.48 | 32.06 | 50.60 | |||||||||||||
| 1935 | 32.92 | 36.11 | 35.34 | 44.60 | 49.55 | 59.38 | 64.95 | 64.80 | a | 59.63 | 44.94 | 32.33 | 30.89 | 46.29 | ||||||||||||
| 1936 | 32.05 | 34.29 | 39.34 | 49.13 | 53.56 | 60.55 | a | 67.44 | 67.40 | 55.10 | 48.18 | 34.57 | 31.47 | 47.76 | ||||||||||||
| 1937 | 14.21 | c | 30.12 | 39.15 | 43.05 | 54.02 | 58.52 | 67.19 | 62.92 | 58.40 | 50.53 | 41.22 | 35.98 | 46.28 | ||||||||||||
| 1938 | 30.84 | 31.79 | 34.90 | 45.37 | 50.87 | 58.67 | 67.41 | d | 63.76 | 58.83 | 47.82 | 33.13 | 33.27 | 46.39 | ||||||||||||
| 1939 | 33.18 | 29.07 | 39.35 | 49.37 | 53.34 | 56.08 | 67.69 | 66.98 | 57.33 | 47.06 | 38.43 | 39.35 | 48.10 | |||||||||||||
| 1940 | 34.60 | 36.71 | 41.19 | 45.97 | 55.05 | 62.43 | 64.87 | 66.13 | 56.63 | 49.69 | b | 34.82 | 33.81 | 48.49 | ||||||||||||
| 1941 | 33.56 | 37.71 | 40.76 | 43.32 | 51.66 | 57.08 | 67.40 | 62.61 | 52.25 | 46.15 | 42.25 | 33.81 | 47.38 | |||||||||||||
| 1942 | 27.69 | 31.79 | 37.94 | 45.27 | 48.66 | 56.74 | a | 67.92 | 65.37 | 56.98 | 50.08 | 39.30 | 34.29 | 46.84 | ||||||||||||
| 1943 | 28.82 | 35.52 | 39.58 | 48.13 | 48.85 | 53.27 | 65.19 | 61.44 | 61.57 | 47.81 | 38.65 | 28.90 | 46.48 | |||||||||||||
| 1944 | 28.95 | 33.02 | 37.50 | 42.68 | 50.77 | 54.07 | 63.23 | 62.35 | 56.90 | 50.60 | 33.62 | 31.40 | 45.42 | |||||||||||||
| 1945 | 33.42 | 35.04 | 36.60 | 42.58 | 51.44 | 56.80 | 66.82 | 64.24 | 54.77 | 51.06 | 38.03 | 30.47 | 46.77 | |||||||||||||
| 1946 | 30.26 | 32.20 | 39.69 | 46.83 | 51.63 | 57.05 | 65.10 | 65.11 | 55.68 | 42.16 | 35.63 | 34.71 | 46.34 | |||||||||||||
| 1947 | 28.47 | 38.45 | 41.03 | 46.74 | a | 56.81 | 56.12 | 64.55 | 62.89 | 57.17 | 50.87 | 35.70 | 34.24 | 47.75 | ||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.57 | 26.69 | 31.13 | |||
| 1949 | 11.53 | 28.73 | 37.81 | 46.97 | 52.56 | 56.75 | 64.32 | c | 63.97 | a | 57.81 | a | 39.85 | a | 42.76 | a | 30.12 | c | 44.43 | |||||||
| 1950 | 26.42 | a | 34.50 | 36.69 | 43.27 | b | 48.31 | 55.65 | c | 64.96 | d | 64.64 | c | 56.60 | e | 50.65 | d | 43.24 | g | 39.79 | e | 47.41 | ||||
| 1951 | 28.59 | b | 33.82 | 33.05 | 46.03 | a | 50.47 | 61.11 | p | 65.83 | e | 62.58 | 58.10 | 46.03 | 37.07 | 25.12 | b | 44.24 | ||||||||
| 1952 | 23.80 | k | ----- | z | ----- | z | ----- | z | ----- | z | 55.07 | g | 68.69 | j | 63.50 | a | 58.90 | a | 50.58 | a | 31.69 | a | 31.32 | 47.20 | ||
| 1953 | 39.23 | 34.68 | 37.06 | 42.22 | 45.31 | 52.47 | 64.23 | a | 62.87 | e | 58.78 | 45.84 | 42.43 | 32.74 | 46.49 | |||||||||||
| 1954 | 30.13 | 35.62 | 32.48 | a | 43.72 | 51.71 | 53.28 | 64.40 | a | 56.68 | 50.52 | 44.69 | 39.63 | 29.74 | 44.38 | |||||||||||
| 1955 | 24.29 | 28.73 | 35.82 | a | 37.87 | d | 49.08 | a | 59.73 | b | 62.65 | a | 64.52 | 54.85 | 49.58 | 34.95 | 32.77 | 44.57 | ||||||||
| 1956 | 32.95 | 26.43 | 38.02 | 45.32 | 52.52 | a | 56.00 | 65.74 | ----- | z | 53.69 | q | 47.05 | j | 35.60 | 32.08 | 42.74 | |||||||||
| 1957 | 22.71 | 34.59 | 40.66 | 43.97 | a | 51.74 | 58.77 | 61.95 | 59.53 | 58.77 | 44.55 | 33.75 | 36.48 | 45.62 | ||||||||||||
| 1958 | 33.94 | 40.48 | 34.82 | 43.98 | 56.98 | 60.20 | 65.37 | 67.05 | a | 56.22 | 50.81 | 40.58 | 40.89 | 49.28 | ||||||||||||
| 1959 | 36.74 | 33.79 | 39.52 | 47.63 | 48.42 | 61.37 | 68.16 | 62.39 | 55.45 | 48.35 | 38.78 | 28.79 | 47.45 | |||||||||||||
| 1960 | 27.47 | 31.90 | 40.52 | 44.67 | 48.97 | 60.45 | 69.27 | 62.15 | 57.72 | 47.85 | 35.80 | 33.32 | 46.67 | |||||||||||||
| 1961 | 33.90 | 38.36 | 38.84 | 44.05 | 49.38 | c | 64.26 | a | 66.56 | 68.05 | 51.18 | 45.95 | 33.56 | c | 31.78 | a | 47.16 | |||||||||
| 1962 | 23.42 | a | 31.18 | 35.74 | 49.83 | 50.77 | 59.23 | 64.27 | 64.56 | 59.87 | 48.87 | 41.82 | 37.00 | 47.21 | ||||||||||||
| 1963 | 28.40 | 42.38 | 37.63 | 40.55 | 52.94 | 56.60 | 60.81 | 61.73 | 60.85 | 50.03 | 40.60 | 35.65 | 47.35 | |||||||||||||
| 1964 | 30.87 | 31.21 | 34.26 | 41.43 | 48.03 | 55.95 | 65.47 | 63.29 | 54.23 | 50.35 | 36.18 | 33.98 | 45.44 | |||||||||||||
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.81 | d | 28.74 | 33.27 | ||
| 1984 | 31.00 | 32.91 | 40.40 | a | 41.19 | a | 51.58 | 55.07 | 67.02 | a | 66.42 | 54.73 | b | 43.50 | ----- | z | ----- | z | 48.38 | |||||||
| 1985 | ----- | z | 32.60 | m | 34.55 | k | 45.98 | 50.24 | 62.53 | a | 71.34 | 61.05 | i | 50.42 | 46.13 | a | 28.18 | 30.03 | 48.11 | |||||||
| 1986 | 36.70 | a | 36.30 | 46.71 | 40.69 | a | 50.96 | c | 67.57 | 64.52 | c | 69.68 | a | 52.78 | 49.68 | a | 39.52 | e | 33.45 | 49.05 | ||||||
| 1987 | 28.44 | 41.57 | a | 43.05 | 52.36 | a | 57.62 | a | 60.70 | 62.76 | 63.71 | 57.58 | 54.85 | 39.74 | a | 28.08 | a | 49.21 | ||||||||
| 1988 | 32.89 | c | ----- | z | 41.15 | 47.80 | 53.74 | 64.70 | b | 70.73 | 66.84 | c | 56.38 | 57.02 | 42.70 | 31.13 | 51.37 | |||||||||
| 1989 | 27.58 | 24.66 | 41.20 | k | 51.60 | 51.73 | ----- | z | 68.84 | 60.19 | 58.20 | 45.27 | 38.27 | f | 32.84 | 46.77 | ||||||||||
| 1990 | 36.60 | 31.38 | 40.85 | 52.63 | ----- | z | 60.67 | 70.55 | 65.56 | 63.15 | 47.18 | 40.55 | 23.45 | a | 48.42 | |||||||||||
| 1991 | 30.88 | o | 44.09 | 42.60 | 41.97 | 49.10 | 60.10 | 67.97 | 71.39 | 61.50 | 53.13 | 41.90 | 33.16 | 51.54 | ||||||||||||
| 1992 | ----- | z | 39.60 | 52.45 | 51.63 | 63.29 | 65.15 | 64.69 | 66.35 | 56.70 | ----- | z | 42.02 | 29.02 | 53.09 | |||||||||||
| 1993 | 27.48 | 33.41 | 39.47 | 43.83 | 55.56 | 56.85 | 57.61 | 64.13 | 60.55 | 49.98 | 29.78 | 30.58 | 45.77 | |||||||||||||
| 1994 | 33.27 | 29.36 | q | 40.71 | 47.23 | 54.56 | 59.25 | 71.00 | 66.45 | 58.85 | 52.19 | 31.62 | 31.21 | 49.67 | ||||||||||||
| 1995 | 37.08 | 42.93 | 41.68 | 42.43 | 52.94 | 59.67 | 67.18 | 66.81 | 60.50 | 50.10 | 48.58 | 41.50 | 50.95 | |||||||||||||
| 1996 | 38.02 | 34.97 | 44.43 | b | 49.70 | 50.66 | 59.60 | 71.56 | 66.31 | 56.07 | 53.39 | 41.50 | z | 31.96 | r | 52.47 | ||||||||||
| 1997 | ----- | z | 31.75 | t | 40.40 | 39.26 | k | 56.37 | 57.65 | 65.08 | 66.10 | 57.45 | 44.50 | a | 40.82 | 29.23 | 50.84 | |||||||||
| 1998 | 36.34 | 34.50 | 38.89 | 42.63 | 46.08 | a | 56.08 | 67.69 | 65.52 | 59.62 | 43.65 | 38.47 | 26.90 | 46.36 | ||||||||||||
| 1999 | ----- | z | 35.00 | x | 34.10 | 39.90 | a | 45.67 | d | 57.22 | 62.48 | 62.72 | f | 56.07 | p | 48.17 | d | 43.55 | a | 30.67 | a | 45.22 | ||||
| 2000 | 34.65 | 36.45 | j | 37.76 | b | 48.45 | b | 51.82 | c | 59.69 | a | 65.12 | c | 66.02 | e | 54.87 | 43.11 | c | 31.79 | a | 31.32 | 47.69 | ||||
| 2001 | 30.37 | a | 30.29 | d | 40.68 | 41.20 | c | 55.15 | a | 57.36 | a | 63.94 | 67.73 | 59.02 | a | 49.32 | c | 39.63 | 32.48 | 47.26 | ||||||
| 2002 | 32.08 | 33.39 | 35.36 | t | 42.52 | 48.35 | ----- | z | ----- | z | ----- | z | 57.03 | 40.00 | 37.18 | 33.48 | 40.51 | |||||||||
| 2003 | 38.52 | 32.82 | 42.60 | 39.88 | e | 52.73 | 62.48 | i | 67.76 | l | 73.92 | m | 65.98 | ----- | z | ----- | z | ----- | z | 45.42 | ||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 30.71 | 34.46 | 39.45 | 45.17 | 51.78 | 58.68 | 66.15 | 64.86 | 57.02 | 48.08 | 38.11 | 31.94 | 47.03 | |||||||||||||
| S.D. | 5.41 | 4.34 | 3.72 | 3.48 | 3.40 | 3.07 | 2.62 | 2.62 | 2.99 | 3.33 | 3.91 | 4.17 | 1.37 | |||||||||||||
| SKEW | -1.18 | 0.11 | 0.40 | 0.30 | 0.60 | 0.61 | -0.27 | -0.25 | -0.03 | -0.22 | -0.11 | 0.28 | 0.67 | |||||||||||||
| MAX | 39.23 | 44.09 | 52.45 | 52.63 | 63.29 | 67.57 | 71.56 | 71.39 | 65.98 | 57.02 | 48.58 | 41.79 | 50.95 | |||||||||||||
| MIN | 11.53 | 24.66 | 30.02 | 37.87 | 45.31 | 52.47 | 57.61 | 56.68 | 50.42 | 39.85 | 28.18 | 22.63 | 44.38 | |||||||||||||
| NO YRS | 63 | 63 | 66 | 68 | 67 | 65 | 67 | 64 | 68 | 67 | 67 | 69 | 49 | |||||||||||||