| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.92 | e | 47.52 | f | 44.65 | j | 39.23 | i | 31.30 | g | 27.84 | f | 50.92 | |
| 1949 | 21.50 | g | 27.80 | c | 35.56 | d | 39.15 | d | 43.61 | h | 48.95 | h | 49.89 | l | 49.29 | g | 48.14 | h | 37.33 | j | 40.00 | n | 28.16 | f | 34.17 | |
| 1950 | 27.86 | c | 31.41 | f | 34.79 | g | 41.54 | b | 41.75 | g | 47.07 | c | 54.50 | c | 52.35 | e | 47.36 | p | 43.00 | a | 40.68 | b | 36.67 | d | 42.96 | |
| 1951 | 31.57 | a | 32.23 | b | 34.11 | c | 39.40 | e | 44.57 | c | 47.85 | d | 50.74 | d | 47.95 | k | 49.35 | j | 40.12 | e | 36.32 | e | 30.85 | d | 38.78 | |
| 1952 | 30.13 | a | 33.41 | 32.23 | 40.37 | 45.13 | 45.07 | 57.03 | 52.00 | 48.90 | 42.83 | a | 31.63 | 32.71 | 40.95 | |||||||||||
| 1953 | 34.65 | 30.61 | 35.13 | 42.30 | 43.29 | 46.63 | 52.87 | 50.13 | 51.57 | 41.13 | 36.87 | 30.68 | 41.32 | |||||||||||||
| 1954 | 31.58 | 32.25 | 34.58 | 43.83 | 44.35 | 46.40 | 54.32 | 48.03 | 43.67 | 37.94 | 34.60 | 30.58 | 40.18 | |||||||||||||
| 1955 | 26.45 | 28.29 | 32.84 | 34.50 | 42.68 | 47.47 | 50.77 | 52.26 | 47.83 | 40.10 | 34.60 | 37.42 | 39.60 | |||||||||||||
| 1956 | 35.71 | 28.14 | 33.42 | 38.53 | 45.45 | 48.27 | ----- | z | 49.68 | 48.37 | 41.19 | 32.10 | 28.00 | 38.99 | ||||||||||||
| 1957 | 26.68 | 37.25 | 36.84 | 38.30 | 44.77 | 50.37 | 52.35 | 47.42 | 48.27 | 41.77 | 33.27 | 31.00 | 40.69 | |||||||||||||
| 1958 | 30.71 | 38.50 | 34.35 | 36.43 | 46.19 | 50.30 | 55.10 | 57.32 | 50.50 | 43.87 | 34.93 | 33.68 | 42.66 | |||||||||||||
| 1959 | 32.74 | 32.04 | 36.13 | 40.63 | 42.00 | 50.23 | 56.97 | 52.65 | 48.73 | 43.13 | 32.50 | 29.19 | 41.41 | |||||||||||||
| 1960 | 31.45 | 32.17 | 39.19 | 38.50 | 42.42 | 53.30 | 57.19 | 51.58 | 49.63 | 40.77 | 35.70 | 30.00 | 41.83 | |||||||||||||
| 1961 | 30.23 | 34.57 | 36.13 | 39.70 | 40.81 | 53.20 | 56.35 | 60.58 | 46.87 | 42.55 | 33.67 | 30.87 | 42.13 | |||||||||||||
| 1962 | 28.87 | 35.29 | 33.29 | 41.30 | 42.84 | 50.33 | 55.32 | 53.29 | 50.87 | 44.58 | 38.60 | 33.74 | 42.36 | |||||||||||||
| 1963 | 26.45 | 39.75 | 34.26 | 38.73 | 47.23 | 50.23 | 51.90 | 53.13 | 53.53 | 45.45 | 37.27 | 30.97 | 42.41 | |||||||||||||
| 1964 | 30.10 | 29.34 | 32.71 | 36.20 | 41.32 | 49.13 | 53.90 | 54.03 | 46.07 | 44.77 | 33.30 | 36.32 | 40.60 | |||||||||||||
| 1965 | 32.03 | 29.61 | 34.48 | 40.20 | 42.77 | 46.67 | 52.77 | 54.74 | 44.73 | 41.55 | 36.57 | 26.94 | 40.26 | |||||||||||||
| 1966 | 27.29 | 28.39 | 35.13 | 41.00 | 44.90 | 50.17 | 49.81 | 54.68 | 49.63 | 41.74 | 39.10 | 33.52 | 41.28 | |||||||||||||
| 1967 | 32.45 | 32.32 | 35.48 | 34.33 | 44.32 | 51.40 | 58.48 | 61.23 | 55.00 | 43.16 | 40.17 | 28.55 | 43.07 | |||||||||||||
| 1968 | 29.52 | 38.38 | 37.13 | 38.87 | 44.23 | 52.13 | 57.58 | 52.48 | 49.93 | 42.23 | 36.97 | 29.39 | 42.40 | |||||||||||||
| 1969 | 33.16 | 32.07 | 34.39 | 38.77 | 46.45 | 51.17 | 56.90 | 54.55 | 52.13 | 39.77 | 35.73 | 33.87 | 42.41 | |||||||||||||
| 1970 | 36.55 | 36.54 | 36.13 | 34.80 | 46.13 | 53.50 | 58.16 | 54.45 | 49.00 | 42.71 | 39.77 | 32.16 | 43.32 | |||||||||||||
| 1971 | 32.00 | 31.29 | 35.42 | 37.63 | 43.87 | 48.77 | 57.97 | 57.61 | 51.23 | 39.81 | 34.80 | 29.81 | 41.68 | |||||||||||||
| 1972 | 28.42 | 34.93 | 39.55 | 39.23 | 45.65 | 53.27 | 56.06 | 55.55 | 48.27 | 45.13 | 35.87 | 28.26 | 42.51 | |||||||||||||
| 1973 | 30.74 | 37.11 | 34.90 | 40.20 | 49.03 | 54.27 | 57.35 | 54.81 | 49.50 | 42.10 | 38.50 | 34.81 | 43.61 | |||||||||||||
| 1974 | 33.52 | 31.14 | 38.35 | 38.10 | 44.32 | 53.03 | 56.71 | 56.81 | 52.83 | 46.61 | 36.60 | 31.39 | 43.28 | |||||||||||||
| 1975 | 31.16 | 35.07 | 37.00 | 36.43 | 45.84 | 51.83 | 55.13 | 54.48 | 54.73 | 42.03 | 35.27 | 31.68 | 42.56 | |||||||||||||
| 1976 | 29.71 | 34.38 | 33.90 | a | 37.17 | 46.39 | 48.63 | 55.23 | 51.16 | 50.77 | 43.58 | 37.80 | 28.55 | 41.44 | ||||||||||||
| 1977 | 30.29 | 33.32 | 31.65 | 40.47 | 41.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.53 | 36.65 | 35.57 | ||||||||
| 1978 | ----- | z | 36.23 | b | 41.73 | a | ----- | z | 44.57 | c | 49.37 | 56.00 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.58 | ||
| 1979 | 29.20 | a | 30.67 | a | 37.60 | a | 39.40 | 46.42 | 50.37 | 54.87 | a | 54.39 | 51.79 | a | 45.03 | b | 35.79 | a | 32.37 | a | 42.32 | |||||
| 1980 | 36.23 | a | 36.66 | 34.19 | 40.96 | b | 43.93 | a | 48.04 | d | 56.86 | b | 54.39 | ----- | z | 44.10 | a | 36.07 | c | 33.10 | a | 42.23 | ||||
| 1981 | ----- | z | 34.81 | a | 36.65 | 41.57 | 47.03 | 56.50 | 55.94 | 55.16 | 52.93 | 39.39 | 38.83 | 36.96 | e | 45.07 | ||||||||||
| 1982 | 28.68 | 34.64 | 36.87 | 39.40 | 45.97 | 49.57 | 53.30 | a | 53.23 | 46.23 | 39.55 | 30.93 | c | 28.00 | 40.53 | |||||||||||
| 1983 | 28.68 | 32.48 | a | 35.97 | 34.13 | 41.13 | a | 47.10 | 48.38 | b | 58.30 | a | 55.50 | 45.29 | 37.97 | 38.81 | 41.98 | |||||||||
| 1984 | 34.13 | 34.00 | 39.29 | 37.93 | 48.55 | 52.10 | 59.68 | 56.58 | 54.53 | 40.65 | 33.20 | 28.26 | 43.24 | |||||||||||||
| 1985 | 24.65 | 31.14 | 29.94 | 40.37 | 40.84 | 51.83 | 60.39 | 55.97 | 47.37 | 43.13 | 33.27 | 31.19 | 40.84 | |||||||||||||
| 1986 | 36.90 | 38.25 | 40.77 | 39.80 | 42.35 | 50.00 | 53.65 | 54.23 | 47.13 | 44.42 | 36.67 | 34.06 | 43.19 | |||||||||||||
| 1987 | 30.68 | 35.54 | 41.45 | 44.90 | 50.39 | 53.90 | ----- | z | 55.90 | 51.63 | 49.84 | 37.87 | 33.58 | 44.15 | ||||||||||||
| 1988 | 35.23 | 35.10 | 36.39 | 42.83 | 44.45 | 52.47 | 61.45 | 57.45 | 53.23 | 47.71 | 40.27 | 32.68 | 44.94 | |||||||||||||
| 1989 | 30.19 | 34.64 | 42.45 | 47.47 | 48.23 | 54.40 | 59.55 | 55.97 | 52.93 | 46.48 | 38.67 | 33.42 | 45.37 | |||||||||||||
| 1990 | 32.87 | 31.79 | 39.32 | 46.30 | 46.52 | 51.33 | 59.35 | 59.06 | 55.47 | 51.32 | 37.20 | 29.39 | 44.99 | |||||||||||||
| 1991 | 33.00 | 41.25 | 36.77 | 41.47 | 45.48 | 51.83 | ----- | z | 55.23 | 62.03 | 55.23 | 41.53 | 35.58 | 45.40 | ||||||||||||
| 1992 | 32.42 | 41.76 | 43.23 | 46.27 | 54.03 | 56.71 | m | 59.19 | 62.61 | 54.30 | 49.32 | 38.23 | 31.29 | 46.61 | ||||||||||||
| 1993 | 33.48 | 36.21 | 43.19 | 42.50 | 47.06 | 52.80 | 57.29 | 58.61 | 56.77 | 50.65 | 38.97 | 34.55 | 46.01 | |||||||||||||
| 1994 | 35.84 | 35.93 | 41.06 | 43.37 | 47.94 | 54.37 | 62.10 | 60.84 | 55.30 | 46.10 | 33.97 | 34.61 | 45.95 | |||||||||||||
| 1995 | 40.58 | 40.68 | 40.97 | 42.00 | 48.13 | 52.70 | 57.90 | 60.29 | 55.97 | 49.55 | 43.80 | 38.32 | 47.57 | |||||||||||||
| 1996 | 37.29 | 42.10 | 42.00 | 45.17 | 50.61 | 57.10 | 64.97 | 62.77 | 55.07 | 46.52 | 41.20 | 38.97 | 48.65 | |||||||||||||
| 1997 | 37.10 | 37.25 | 43.03 | 44.57 | 54.13 | 56.47 | 62.13 | 59.97 | 57.90 | 47.03 | 42.87 | 33.90 | 48.03 | |||||||||||||
| 1998 | 38.39 | 37.07 | 39.48 | 40.50 | 43.26 | 51.30 | 61.23 | 61.13 | 56.70 | 45.71 | 39.20 | 30.39 | 45.36 | |||||||||||||
| 1999 | 35.64 | f | 37.48 | c | 37.71 | g | 41.46 | f | 47.96 | e | 54.59 | c | 56.42 | e | 58.92 | g | 59.62 | f | 52.77 | e | 43.04 | g | 35.27 | e | 47.42 | |
| 2000 | 38.41 | d | 40.52 | d | 39.50 | e | 45.57 | g | 49.44 | f | 60.00 | e | 57.52 | h | 60.78 | d | 56.61 | g | 48.70 | h | 36.83 | g | 39.05 | k | 47.84 | |
| 2001 | 33.38 | e | 35.82 | f | 43.67 | d | ----- | z | 56.62 | e | 59.04 | f | 60.28 | f | 61.04 | f | 57.74 | g | 52.88 | e | 42.70 | j | 35.67 | j | 46.64 | |
| 2002 | 32.83 | g | 38.62 | g | 38.45 | 44.26 | g | 48.10 | 57.53 | 62.42 | 59.52 | 59.37 | k | 47.03 | 43.37 | 38.87 | 49.41 | |||||||||
| 2003 | 41.35 | 37.43 | 41.81 | 40.00 | 50.55 | 57.13 | 66.10 | 60.00 | 60.00 | g | 53.65 | 38.27 | 39.03 | 47.76 | ||||||||||||
| 2004 | 35.42 | 36.97 | 46.16 | 45.30 | 49.97 | 55.10 | 60.78 | m | 62.29 | n | 56.19 | i | 48.94 | o | 40.62 | q | 35.15 | k | 44.82 | |||||||
| 2005 | 38.13 | p | 42.55 | f | 42.29 | 43.53 | 51.29 | 54.03 | 67.19 | 65.74 | 54.23 | 49.10 | 44.80 | 40.16 | 51.24 | |||||||||||
| 2006 | 39.03 | 39.43 | 36.16 | 45.70 | 54.93 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.05 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 32.41 | 34.74 | 37.40 | 40.42 | 46.15 | 51.56 | 56.78 | 55.90 | 51.55 | 44.73 | 37.09 | 32.90 | 42.90 | |||||||||||||
| S.D. | 3.82 | 3.68 | 3.60 | 3.20 | 3.63 | 3.25 | 4.04 | 3.95 | 3.84 | 4.07 | 3.20 | 3.42 | 2.21 | |||||||||||||
| SKEW | 0.32 | 0.02 | 0.33 | 0.14 | 0.88 | 0.27 | 0.39 | 0.17 | 0.22 | 0.72 | 0.33 | 0.34 | 0.95 | |||||||||||||
| MAX | 41.35 | 42.10 | 46.16 | 47.47 | 56.62 | 60.00 | 67.19 | 65.74 | 62.03 | 55.23 | 44.80 | 40.16 | 48.65 | |||||||||||||
| MIN | 24.65 | 27.80 | 29.94 | 34.13 | 40.81 | 45.07 | 48.38 | 47.42 | 43.67 | 37.94 | 30.93 | 26.94 | 39.60 | |||||||||||||
| NO YRS | 52 | 54 | 56 | 53 | 55 | 53 | 50 | 50 | 45 | 52 | 51 | 52 | 39 | |||||||||||||