| 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 | 26.36 | 29.00 | 34.73 | 36.55 | 39.20 | 46.35 | 43.16 | 36.40 | 35.03 | 25.70 | 13.52 | 33.27 | ||||||||||||
| 1915 | 21.65 | 28.71 | 29.32 | 33.73 | 38.41 | d | 36.79 | a | 44.13 | 46.03 | b | 34.57 | 31.61 | 27.47 | 24.32 | 33.06 | ||||||||||
| 1916 | 19.42 | 28.55 | 31.39 | 33.57 | 31.16 | 38.73 | 40.97 | 40.68 | 36.17 | 24.78 | d | 20.30 | 19.61 | 30.44 | ||||||||||||
| 1917 | 12.55 | 22.50 | 20.35 | 32.07 | 34.42 | 38.13 | 46.77 | 43.81 | 41.20 | 27.61 | 29.54 | b | 33.71 | 31.89 | ||||||||||||
| 1918 | 26.45 | 23.61 | 29.06 | 24.77 | 30.94 | 43.90 | 46.97 | 40.06 | 41.20 | 32.45 | 25.17 | 19.68 | 32.02 | |||||||||||||
| 1919 | 18.94 | 25.04 | 26.42 | 32.43 | 37.97 | 41.03 | 46.10 | 47.35 | 41.23 | 25.00 | 23.60 | 14.90 | 31.67 | |||||||||||||
| 1920 | 22.06 | 16.38 | 26.84 | 28.62 | a | 31.94 | 40.23 | 45.35 | 44.29 | 43.20 | 34.84 | 27.67 | 26.74 | 32.35 | ||||||||||||
| 1921 | 22.10 | 26.43 | 32.35 | 31.87 | 35.97 | 43.20 | 41.68 | 45.87 | 33.23 | 32.74 | 30.03 | 23.23 | 33.22 | |||||||||||||
| 1922 | 10.00 | 20.14 | 24.35 | 27.13 | 36.16 | 43.53 | 48.00 | 47.32 | 40.60 | 34.10 | 22.83 | 26.45 | 31.72 | |||||||||||||
| 1923 | 25.26 | 19.50 | 24.10 | 35.10 | 37.13 | 39.40 | 45.65 | 44.90 | 39.53 | 30.68 | 22.53 | 19.68 | 31.95 | |||||||||||||
| 1924 | 18.39 | 29.59 | 23.16 | 28.23 | 35.90 | 38.10 | 45.52 | 40.52 | 40.27 | 32.32 | 25.33 | 14.23 | 30.96 | |||||||||||||
| 1925 | 28.77 | 29.46 | 28.71 | 34.23 | 39.16 | 41.70 | 48.61 | 46.94 | 39.43 | 30.32 | 28.70 | 24.00 | 35.00 | |||||||||||||
| 1926 | 19.26 | 31.89 | 25.13 | 37.03 | 35.55 | 42.83 | 45.35 | ----- | z | 31.63 | 36.94 | 34.13 | 23.77 | 33.05 | ||||||||||||
| 1927 | 26.77 | 27.86 | 29.03 | 30.13 | 35.42 | 43.07 | 45.32 | 44.52 | 39.20 | 34.61 | 34.77 | 16.61 | 33.94 | |||||||||||||
| 1928 | 28.61 | 23.97 | 31.90 | 30.17 | 37.45 | 39.97 | 45.97 | 41.84 | 39.13 | 29.71 | 27.60 | 16.06 | 32.70 | |||||||||||||
| 1929 | 17.29 | 18.36 | 29.10 | 29.17 | 34.23 | 40.87 | 45.29 | 47.58 | 30.30 | 29.16 | 16.20 | 27.74 | 30.44 | |||||||||||||
| 1930 | 9.45 | 33.61 | 26.48 | 35.70 | 36.39 | 38.23 | 45.06 | 45.84 | 37.23 | 30.61 | 20.20 | 15.84 | 31.22 | |||||||||||||
| 1931 | 23.74 | 21.54 | 28.35 | 28.67 | 41.45 | 41.40 | 47.10 | 46.29 | 38.63 | 26.10 | 21.30 | 22.26 | 32.24 | |||||||||||||
| 1932 | 20.90 | 18.97 | 29.94 | 30.50 | 35.26 | 40.87 | 41.52 | 39.10 | 32.83 | 29.00 | a | 31.45 | a | 10.39 | 30.06 | |||||||||||
| 1933 | 18.32 | 13.57 | 27.65 | 26.67 | 32.32 | 40.53 | 44.38 | b | 42.52 | 36.90 | 31.35 | 21.40 | 31.68 | 30.61 | ||||||||||||
| 1934 | 27.71 | 27.86 | 31.61 | 31.37 | 39.39 | 39.30 | 45.00 | 44.45 | 33.73 | 35.55 | 32.63 | 22.77 | 34.28 | |||||||||||||
| 1935 | 23.81 | 25.04 | 23.68 | 31.40 | 30.19 | 39.73 | 43.87 | 40.55 | 35.93 | 27.13 | 19.67 | 19.10 | 30.01 | |||||||||||||
| 1936 | 24.35 | 26.69 | 24.74 | 34.33 | 36.45 | 44.28 | a | 44.97 | 45.48 | 33.40 | 26.10 | 13.20 | 20.45 | 31.20 | ||||||||||||
| 1937 | 0.29 | c | 21.96 | 28.84 | 30.57 | 34.77 | 41.97 | 44.81 | 38.81 | 36.37 | 33.97 | 31.27 | 25.68 | 30.77 | ||||||||||||
| 1938 | 21.29 | 22.57 | 26.61 | 31.40 | 33.84 | 39.77 | 47.72 | b | 42.03 | 38.23 | 34.74 | 21.00 | 20.94 | 31.68 | ||||||||||||
| 1939 | 22.58 | 19.29 | 25.16 | 31.40 | 35.29 | 37.57 | 46.84 | 43.81 | 36.70 | 30.19 | 19.30 | 29.23 | 31.45 | |||||||||||||
| 1940 | 24.71 | 28.97 | 28.16 | 32.17 | 36.32 | 40.10 | 43.16 | 42.42 | 41.17 | 35.97 | b | 24.50 | 22.55 | 33.35 | ||||||||||||
| 1941 | 24.10 | 28.32 | 25.23 | 27.83 | 36.29 | 40.80 | 45.52 | 44.97 | 34.37 | 30.68 | 28.63 | 26.61 | 32.78 | |||||||||||||
| 1942 | 17.42 | 23.64 | 25.94 | 31.63 | 35.77 | 39.59 | a | 46.74 | 42.84 | 34.83 | 31.97 | 29.40 | 25.23 | 32.08 | ||||||||||||
| 1943 | 17.81 | 23.61 | 27.06 | 33.83 | 31.26 | 36.07 | 43.19 | 39.71 | 37.33 | 33.26 | 24.87 | 16.52 | 30.38 | |||||||||||||
| 1944 | 16.65 | 24.10 | 23.29 | 29.10 | 31.68 | 39.47 | 42.03 | 39.45 | 34.43 | 32.29 | 24.37 | 20.97 | 29.82 | |||||||||||||
| 1945 | 23.10 | 25.68 | 26.23 | 25.63 | 37.16 | 40.40 | 44.26 | 42.10 | 31.90 | 32.87 | 29.67 | 21.71 | 31.72 | |||||||||||||
| 1946 | 19.03 | 22.93 | 28.81 | 29.67 | 32.52 | 39.60 | 44.71 | 41.97 | 35.17 | 27.32 | 24.27 | 25.00 | 30.92 | |||||||||||||
| 1947 | 14.84 | 24.86 | 26.52 | 29.45 | a | 38.45 | 39.37 | 44.45 | 40.81 | 33.63 | 38.03 | 25.77 | 25.10 | 31.77 | ||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.97 | 15.16 | 20.06 | |||
| 1949 | -3.71 | 20.32 | 29.19 | 29.57 | 38.10 | 37.37 | 42.43 | c | 43.23 | a | 36.97 | a | 21.40 | a | 25.55 | a | 19.79 | c | 28.35 | |||||||
| 1950 | 17.67 | a | 24.21 | 26.84 | 27.39 | b | 31.26 | 40.22 | c | 43.19 | d | 43.36 | c | 37.88 | e | 35.22 | d | 33.00 | g | 31.42 | e | 32.61 | ||||
| 1951 | 20.03 | b | 24.61 | 19.87 | 28.72 | a | 35.52 | 37.43 | p | 43.88 | e | 40.42 | 35.97 | 31.55 | 25.30 | 13.63 | a | 29.05 | ||||||||
| 1952 | 11.75 | k | ----- | z | ----- | z | ----- | z | ----- | z | 40.04 | g | 49.62 | j | 41.87 | a | 39.14 | a | 28.26 | 15.03 | a | 22.84 | 29.43 | |||
| 1953 | 32.10 | 23.14 | 23.77 | 27.57 | 32.52 | 36.20 | 41.10 | a | 43.27 | e | 35.07 | 27.13 | 31.10 | 20.13 | 31.09 | |||||||||||
| 1954 | 20.97 | 21.43 | 18.17 | a | 24.77 | 29.87 | 35.13 | 40.77 | a | 34.58 | 25.83 | 24.97 | 21.67 | 19.26 | 26.45 | |||||||||||
| 1955 | 12.55 | 18.21 | 23.07 | a | 25.27 | d | 33.30 | a | 40.57 | b | 43.77 | 39.23 | 33.37 | 31.45 | 22.93 | 25.61 | 29.11 | |||||||||
| 1956 | 25.65 | 15.59 | 24.90 | 29.30 | 38.23 | a | 38.47 | 45.03 | ----- | z | 33.77 | q | 29.05 | j | 18.70 | 17.10 | 28.11 | |||||||||
| 1957 | 10.97 | 24.21 | 29.87 | 29.41 | a | 37.94 | 39.03 | 39.74 | 37.19 | 38.70 | 33.06 | 20.70 | 26.65 | 30.62 | ||||||||||||
| 1958 | 26.71 | 32.61 | 24.26 | 31.93 | 38.06 | 44.73 | 46.19 | 46.27 | a | 36.50 | 31.06 | 28.60 | 29.10 | 34.67 | ||||||||||||
| 1959 | 27.84 | 24.18 | 23.81 | 29.67 | 33.35 | 42.10 | 44.77 | 40.13 | 38.80 | 30.10 | 19.10 | 13.19 | 30.59 | |||||||||||||
| 1960 | 18.13 | 22.34 | 26.35 | 29.97 | 34.35 | 37.97 | 46.81 | 40.39 | 35.60 | 31.13 | 25.77 | 22.61 | 30.95 | |||||||||||||
| 1961 | 19.35 | 29.57 | 28.71 | 27.50 | 34.43 | c | 44.24 | a | 43.42 | 47.94 | 31.60 | 29.00 | 20.21 | b | 23.00 | a | 31.58 | |||||||||
| 1962 | 9.70 | a | 22.57 | 24.42 | 31.57 | 35.84 | 37.47 | 41.39 | 43.87 | 37.87 | 31.13 | 29.70 | 25.68 | 30.93 | ||||||||||||
| 1963 | 12.06 | 31.29 | 25.87 | 30.40 | 38.84 | 40.53 | 41.03 | 40.58 | 41.97 | 34.06 | 31.13 | 25.10 | 32.74 | |||||||||||||
| 1964 | 22.48 | 17.90 | 21.84 | 26.10 | 32.16 | 42.33 | 45.94 | 43.26 | 33.53 | 30.87 | 25.87 | 27.06 | 30.78 | |||||||||||||
| 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 | 29.31 | d | 20.16 | 24.73 | ||
| 1984 | 19.06 | 20.24 | 28.40 | a | 28.28 | a | 36.32 | 38.43 | 45.80 | a | 46.00 | 35.43 | b | 30.94 | ----- | z | ----- | z | 32.89 | |||||||
| 1985 | ----- | z | 14.88 | l | 17.95 | k | 30.00 | 34.19 | 43.83 | 54.81 | 41.91 | i | 35.67 | 31.58 | 16.93 | 18.97 | 33.25 | |||||||||
| 1986 | 27.27 | a | 27.75 | 34.94 | 25.57 | 36.67 | a | 50.57 | 47.21 | b | 50.00 | 38.40 | 35.33 | a | 26.15 | d | 19.74 | 34.97 | ||||||||
| 1987 | 19.48 | 30.78 | a | 32.16 | 35.97 | 42.84 | 43.63 | 43.03 | 41.81 | 39.20 | 39.77 | 29.72 | a | 21.13 | a | 34.96 | ||||||||||
| 1988 | 27.68 | c | ----- | z | 25.19 | 36.50 | 42.32 | 48.67 | 50.16 | 47.41 | b | 38.67 | 38.00 | 32.97 | 20.16 | 37.07 | ||||||||||
| 1989 | 19.13 | 15.82 | 32.75 | k | 38.47 | 38.29 | ----- | z | 48.87 | 43.06 | 41.70 | 30.13 | 23.62 | d | 19.03 | 31.81 | ||||||||||
| 1990 | 28.35 | 20.36 | 26.87 | 39.03 | ----- | z | 45.20 | 53.39 | 49.42 | 45.27 | 36.29 | 28.67 | 10.58 | 34.86 | ||||||||||||
| 1991 | 18.50 | o | 33.93 | 32.16 | 34.03 | 38.13 | 41.93 | 48.32 | 55.26 | 42.93 | 38.35 | 33.80 | 18.52 | 37.94 | ||||||||||||
| 1992 | ----- | z | 32.21 | 40.61 | 33.03 | 44.42 | 47.37 | 48.68 | 46.87 | 39.57 | ----- | z | 31.43 | 20.23 | 38.44 | |||||||||||
| 1993 | 18.90 | 24.46 | 29.87 | 33.47 | 40.42 | 40.73 | 41.42 | 48.03 | 43.00 | 35.48 | 15.17 | 19.68 | 32.55 | |||||||||||||
| 1994 | 23.77 | 19.27 | q | 23.52 | 32.20 | 40.16 | 42.83 | 51.81 | 46.52 | 41.83 | 33.77 | 19.90 | 21.61 | 34.36 | ||||||||||||
| 1995 | 28.10 | 30.18 | 33.35 | 31.40 | 44.26 | 44.53 | 50.71 | 48.23 | 43.47 | 35.32 | 38.13 | 33.61 | 38.44 | |||||||||||||
| 1996 | 28.90 | 25.48 | 37.31 | b | 39.00 | 35.65 | 44.20 | 52.13 | 48.00 | 38.53 | 40.13 | 27.50 | z | 24.81 | o | 38.93 | ||||||||||
| 1997 | ----- | z | 19.00 | t | 25.58 | 24.74 | k | 39.42 | 41.40 | 45.19 | 46.52 | 38.03 | 28.10 | a | 30.50 | 17.26 | 34.67 | |||||||||
| 1998 | 29.03 | 26.32 | 27.26 | 30.40 | 36.32 | 41.33 | 47.84 | 42.74 | 41.27 | 26.35 | 29.83 | 16.65 | 32.95 | |||||||||||||
| 1999 | ----- | z | 25.50 | x | 23.61 | 27.20 | 31.31 | b | 40.60 | 41.81 | 45.12 | f | 34.21 | p | 29.19 | d | 31.10 | a | 18.87 | a | 30.46 | |||||
| 2000 | 25.84 | 27.16 | j | 24.86 | b | 32.57 | b | 36.29 | c | 39.62 | a | 44.68 | c | 43.69 | e | 37.03 | 28.50 | c | 19.50 | 19.48 | 32.01 | |||||
| 2001 | 18.90 | a | 19.21 | d | 26.68 | 27.67 | c | 35.67 | a | 37.07 | a | 43.03 | 46.48 | 38.76 | a | 32.25 | c | 28.37 | 25.35 | 31.62 | ||||||
| 2002 | 21.29 | 19.89 | 25.27 | t | 27.23 | 29.26 | ----- | z | ----- | z | ----- | z | 35.07 | 20.32 | 22.17 | 23.74 | 24.87 | |||||||||
| 2003 | 28.74 | 22.36 | 31.71 | 28.73 | d | 37.58 | 42.14 | i | 46.40 | k | 60.28 | m | 50.50 | ----- | z | ----- | z | ----- | z | 33.27 | ||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 20.71 | 24.33 | 27.27 | 30.80 | 35.98 | 40.89 | 45.40 | 43.81 | 37.55 | 31.48 | 25.56 | 21.57 | 31.82 | |||||||||||||
| S.D. | 6.77 | 4.72 | 3.91 | 3.40 | 3.33 | 2.94 | 3.06 | 3.49 | 3.89 | 4.05 | 5.32 | 5.09 | 1.91 | |||||||||||||
| SKEW | -1.19 | 0.03 | 0.68 | 0.45 | 0.26 | 0.79 | 0.75 | 0.25 | 0.16 | -0.27 | -0.14 | 0.16 | 0.56 | |||||||||||||
| MAX | 32.10 | 33.93 | 40.61 | 39.03 | 44.42 | 50.57 | 54.81 | 55.26 | 50.50 | 40.13 | 38.13 | 33.71 | 38.44 | |||||||||||||
| MIN | -3.71 | 13.57 | 18.17 | 24.77 | 29.26 | 35.13 | 39.74 | 34.58 | 25.83 | 20.32 | 13.20 | 10.39 | 26.45 | |||||||||||||
| NO YRS | 63 | 63 | 66 | 68 | 68 | 65 | 67 | 64 | 68 | 67 | 68 | 69 | 50 | |||||||||||||