| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.00 | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 41.14 | i | 39.20 | 43.90 | 60.28 | 60.16 | 56.34 | 54.73 | 46.78 | a | 32.23 | 24.27 | 46.43 | |||||||||
| 1919 | 26.63 | 30.36 | 35.53 | 41.15 | 46.77 | 51.70 | 61.90 | 59.32 | 49.85 | 36.19 | 32.43 | 20.97 | 41.07 | |||||||||||||
| 1920 | 30.98 | 41.69 | 32.84 | 37.23 | 43.50 | c | 53.00 | a | 59.85 | 60.77 | a | 51.12 | 41.15 | 31.80 | 26.97 | 42.57 | ||||||||||
| 1921 | 26.47 | 33.16 | 36.62 | a | 39.58 | 46.37 | 54.73 | 59.15 | 58.05 | b | 47.05 | 46.10 | 39.18 | m | 25.47 | a | 42.98 | |||||||||
| 1922 | 13.53 | 23.02 | e | 29.13 | h | 36.02 | 46.68 | n | 57.32 | 61.40 | 58.29 | 53.00 | 44.21 | 29.57 | 26.35 | 40.27 | ||||||||||
| 1923 | 29.69 | 23.09 | a | 32.82 | 39.80 | 47.03 | 50.07 | 60.56 | 60.37 | 53.65 | 40.31 | 33.52 | 25.88 | b | 41.40 | |||||||||||
| 1924 | ----- | z | 37.14 | 31.39 | 40.38 | 51.92 | 55.20 | 60.21 | 58.13 | 51.50 | 40.05 | 31.84 | a | 16.87 | 43.15 | |||||||||||
| 1925 | 31.24 | 32.93 | 34.35 | 39.38 | 47.82 | 53.13 | c | 63.21 | 57.22 | a | 49.67 | 39.98 | g | 34.59 | a | 29.89 | i | 44.35 | ||||||||
| 1926 | 27.72 | a | 36.46 | 37.93 | a | 46.18 | 46.40 | 58.17 | 62.15 | 58.69 | 44.68 | 43.85 | 38.74 | a | 28.34 | 44.11 | ||||||||||
| 1927 | 29.95 | 30.75 | 34.53 | 39.35 | f | 43.98 | a | 54.52 | g | 59.37 | 56.53 | 47.72 | 45.00 | 37.85 | 22.13 | h | 42.85 | |||||||||
| 1928 | 30.07 | a | 32.07 | g | 39.16 | c | 39.16 | a | 52.23 | 54.84 | e | 62.47 | a | 57.48 | c | 52.09 | c | 42.08 | g | 39.35 | m | 26.12 | e | 45.96 | ||
| 1929 | 23.27 | 21.09 | e | 36.72 | b | 33.38 | m | 46.57 | b | 50.85 | c | 60.21 | g | 60.58 | g | 47.78 | 46.15 | e | 32.00 | i | 35.61 | 38.51 | ||||
| 1930 | 14.16 | 36.43 | 37.79 | 43.57 | 46.50 | 51.65 | d | 61.19 | 60.08 | a | 51.47 | k | 45.54 | s | ----- | z | 21.03 | 41.38 | ||||||||
| 1931 | 29.47 | 31.68 | 37.37 | a | 37.96 | c | 51.11 | 48.90 | 65.31 | 60.98 | f | 49.02 | g | 41.64 | c | 31.34 | b | 24.29 | 39.91 | |||||||
| 1932 | 23.18 | 25.85 | c | 38.29 | 41.00 | l | 47.24 | 55.72 | 57.90 | 57.40 | 56.39 | p | 45.24 | b | 39.37 | 21.67 | b | 41.19 | ||||||||
| 1933 | 24.86 | f | 25.46 | 35.45 | 40.82 | 43.18 | 55.62 | 62.68 | 60.48 | 49.18 | 46.53 | 34.62 | 37.12 | a | 44.65 | |||||||||||
| 1934 | 35.74 | 38.10 | r | 42.50 | 47.23 | 52.32 | 50.85 | j | 60.27 | 61.58 | 52.75 | 45.48 | a | 38.80 | 28.89 | 46.56 | ||||||||||
| 1935 | 25.88 | c | 29.80 | a | 32.24 | 40.53 | 47.23 | 54.48 | c | 60.68 | ----- | z | 54.88 | ----- | z | 26.53 | 27.15 | 39.94 | ||||||||
| 1936 | 27.92 | 30.03 | 36.08 | 44.98 | 49.90 | 55.42 | 62.95 | 59.52 | a | 50.63 | 44.59 | b | 28.50 | 17.06 | w | 44.59 | ||||||||||
| 1937 | ----- | z | 26.57 | 34.89 | c | 38.52 | 49.52 | 55.12 | 61.32 | 56.79 | 52.92 | 45.60 | 35.88 | a | 33.58 | a | 44.61 | |||||||||
| 1938 | 28.35 | 26.91 | 33.40 | 43.15 | 47.98 | 55.38 | a | 63.18 | 57.94 | 55.86 | a | 43.47 | 30.82 | 30.40 | 43.07 | |||||||||||
| 1939 | 27.56 | 28.60 | b | 38.35 | a | 47.22 | l | 51.25 | g | 52.57 | ----- | z | 62.06 | 54.32 | 44.79 | 35.08 | 33.53 | 41.87 | ||||||||
| 1940 | 29.94 | 35.34 | 39.50 | 42.82 | 51.44 | 59.23 | ----- | z | 61.15 | 52.20 | 48.08 | g | 32.37 | d | 28.26 | 43.22 | ||||||||||
| 1941 | 29.85 | 33.73 | 37.56 | 41.10 | 47.16 | b | 52.58 | 61.95 | 59.55 | 48.59 | a | 43.08 | 37.70 | 29.23 | 43.51 | |||||||||||
| 1942 | 22.59 | c | 28.14 | g | 35.21 | 42.08 | 44.88 | b | 52.00 | 62.82 | 61.21 | 55.36 | e | 45.39 | 37.26 | g | 32.71 | 45.43 | ||||||||
| 1943 | ----- | z | 29.54 | 35.90 | 44.85 | 44.29 | 49.88 | 60.29 | 57.97 | 57.73 | 53.45 | u | 35.96 | f | 28.08 | 45.39 | ||||||||||
| 1944 | 21.71 | 31.09 | 35.16 | 39.92 | 48.18 | 51.75 | 59.73 | 58.58 | s | 53.57 | 50.15 | d | 32.42 | 28.77 | 41.13 | |||||||||||
| 1945 | 29.73 | 33.34 | 32.31 | ----- | z | 48.81 | 52.23 | 61.87 | 60.12 | a | 51.37 | 45.50 | 34.22 | 27.98 | b | 43.41 | ||||||||||
| 1946 | 25.59 | h | 28.86 | 36.82 | 41.57 | 47.50 | 51.80 | 60.15 | d | 58.65 | 48.75 | 37.23 | a | 33.87 | 31.74 | 43.36 | ||||||||||
| 1947 | 24.40 | ----- | z | 36.82 | 41.97 | 51.69 | 52.07 | 58.44 | 56.65 | 53.15 | 47.05 | 34.05 | 30.58 | 44.26 | ||||||||||||
| 1948 | 29.63 | 27.97 | 31.85 | 35.98 | 44.77 | 56.17 | ----- | z | 55.40 | a | 50.45 | 42.42 | 34.33 | d | 21.53 | a | 39.14 | |||||||||
| 1949 | 13.15 | 27.33 | a | 35.95 | j | 42.68 | ----- | z | 52.87 | o | 59.79 | b | 58.92 | 52.71 | i | 38.74 | f | 42.02 | 29.10 | 39.00 | ||||||
| 1950 | 24.73 | 31.96 | 35.16 | 38.38 | a | 45.85 | 52.55 | 59.68 | 60.40 | 53.56 | d | 47.02 | f | 41.25 | 38.89 | 43.86 | ||||||||||
| 1951 | 30.12 | r | ----- | z | ----- | z | 47.45 | h | 48.79 | j | 54.32 | 60.50 | 58.53 | 52.37 | 41.45 | 33.08 | d | 23.35 | g | 50.04 | ||||||
| 1952 | 24.21 | g | 27.93 | 29.92 | 44.32 | 48.97 | 52.42 | 61.82 | 59.52 | a | 54.60 | 46.71 | 26.80 | 24.87 | 43.44 | |||||||||||
| 1953 | 35.52 | 33.39 | 33.45 | 37.28 | 41.69 | 46.93 | 58.68 | 56.44 | ----- | z | ----- | z | ----- | z | ----- | z | 42.92 | |||||||||
| 1954 | ----- | z | 33.62 | 30.94 | 40.18 | 47.72 | a | 49.50 | c | ----- | z | 53.00 | 48.23 | 40.87 | 37.71 | a | 25.05 | 40.68 | ||||||||
| 1955 | 20.44 | 28.05 | 31.92 | 32.83 | c | 43.95 | 55.27 | 54.95 | 57.11 | 54.00 | i | ----- | z | 31.71 | f | 28.55 | 39.23 | |||||||||
| 1956 | ----- | z | ----- | z | ----- | z | 45.38 | j | 46.12 | o | 52.80 | 61.10 | 56.45 | 51.90 | 42.13 | 33.32 | 28.45 | 46.59 | ||||||||
| 1957 | 18.53 | 30.55 | 39.02 | c | 40.30 | 50.11 | 58.31 | i | 57.60 | 55.39 | ----- | z | ----- | z | ----- | z | ----- | z | 41.64 | |||||||
| 1958 | ----- | z | ----- | z | ----- | z | 37.78 | 53.18 | 54.32 | 59.76 | 62.29 | 49.87 | 45.53 | 35.77 | 33.60 | 48.01 | ||||||||||
| 1959 | 32.89 | 31.14 | 35.68 | 40.05 | 42.69 | 54.32 | 62.59 | c | 57.21 | 50.60 | 44.55 | a | 35.83 | 25.94 | 42.79 | |||||||||||
| 1960 | 22.70 | d | 28.97 | 37.98 | 41.25 | 42.19 | 53.87 | 66.11 | d | 56.42 | a | 54.42 | 45.53 | 32.54 | b | 26.95 | 42.41 | |||||||||
| 1961 | 29.87 | a | 33.89 | i | 33.16 | 40.31 | i | 43.90 | p | 59.32 | 61.77 | 63.11 | h | 43.60 | y | 42.76 | j | ----- | z | ----- | z | 46.03 | ||||
| 1962 | ----- | z | ----- | z | 33.25 | a | 43.38 | b | 45.14 | f | 54.10 | j | 60.08 | l | 58.48 | d | 56.00 | c | 44.48 | h | 38.10 | a | 30.96 | g | 45.84 | |
| 1963 | 26.18 | f | 39.87 | m | 36.16 | f | 40.02 | e | 50.62 | k | 53.15 | m | 57.32 | l | 59.91 | d | 57.45 | j | 46.38 | f | 37.70 | o | 32.74 | j | 49.96 | |
| 1964 | 27.02 | d | 31.41 | f | 32.06 | o | 37.90 | e | 43.53 | 52.16 | e | ----- | z | 56.67 | d | 48.65 | c | 45.82 | 28.73 | f | 27.86 | c | 42.45 | |||
| 1965 | 29.18 | a | 33.54 | 33.24 | b | 41.87 | 46.27 | 54.69 | c | 59.44 | 58.19 | 46.68 | 45.94 | 34.93 | 24.89 | 42.40 | ||||||||||
| 1966 | 28.15 | g | 27.56 | a | 34.21 | 41.29 | a | 48.26 | 51.19 | c | 56.69 | 59.03 | b | 53.48 | f | 43.18 | 36.35 | 30.48 | 42.82 | |||||||
| 1967 | 30.65 | 33.66 | 32.85 | 33.12 | a | 48.36 | j | 55.08 | 62.47 | 63.73 | 56.00 | c | 46.27 | c | 36.26 | a | 24.94 | 43.18 | ||||||||
| 1968 | 28.02 | 35.88 | 37.34 | f | 37.67 | ----- | z | 58.54 | p | 62.82 | 57.61 | c | 52.23 | 43.41 | c | 33.77 | b | 25.05 | 41.83 | |||||||
| 1969 | 24.89 | 25.75 | 32.27 | 39.94 | e | 49.47 | a | 55.09 | b | 59.60 | 57.56 | 53.15 | 38.02 | 34.33 | 30.54 | d | 41.72 | |||||||||
| 1970 | 28.15 | 34.05 | 32.74 | 33.90 | a | 46.44 | 57.60 | d | 60.57 | d | 58.33 | d | 47.65 | 39.75 | c | 36.00 | h | 19.77 | r | 43.92 | ||||||
| 1971 | 29.75 | a | 31.20 | 30.34 | b | 37.65 | g | 47.79 | 51.48 | 61.16 | i | 62.94 | g | 48.48 | 40.52 | 34.87 | 24.76 | 37.69 | ||||||||
| 1972 | 26.50 | d | 32.45 | 39.63 | 38.10 | 49.53 | a | 56.83 | 62.15 | e | 61.08 | 48.52 | d | 42.53 | 34.71 | f | 18.91 | b | 43.29 | |||||||
| 1973 | 25.77 | c | 32.61 | 33.92 | 40.85 | d | 50.35 | a | ----- | z | ----- | z | ----- | z | 54.59 | a | 42.60 | a | 35.63 | d | 32.41 | d | 38.75 | |||
| 1974 | 24.38 | a | 31.50 | 35.80 | a | 39.63 | d | 44.66 | c | 58.08 | f | 64.69 | r | 57.40 | g | 55.36 | e | 41.72 | b | 35.40 | 24.73 | e | 37.02 | |||
| 1975 | 28.08 | e | 29.16 | 32.29 | 33.67 | d | 46.72 | a | 54.09 | b | 64.55 | 56.70 | h | 53.62 | 44.29 | e | 31.14 | h | 33.06 | 41.95 | ||||||
| 1976 | 31.48 | c | 31.66 | a | 33.14 | f | 38.41 | b | 48.56 | e | 50.64 | l | 62.96 | e | 57.68 | c | 54.48 | f | 43.58 | a | 36.43 | b | 25.17 | g | 43.85 | |
| 1977 | 22.78 | b | 32.62 | 33.22 | a | 43.85 | 43.02 | c | 59.08 | 60.61 | 61.91 | i | 50.90 | 44.79 | 34.22 | 33.74 | l | 42.51 | ||||||||
| 1978 | 32.89 | ----- | z | 41.35 | 38.18 | e | 45.69 | 54.90 | 62.08 | 60.11 | 48.93 | 45.32 | c | 26.38 | d | 21.85 | 43.43 | |||||||||
| 1979 | 19.76 | 32.38 | 38.79 | b | 40.68 | 50.33 | b | ----- | z | 61.45 | ----- | z | ----- | z | 47.60 | 31.38 | 31.74 | 39.35 | ||||||||
| 1980 | 27.81 | 36.38 | a | 34.98 | f | 42.22 | 47.95 | a | 51.59 | c | ----- | z | 55.10 | f | 53.97 | a | 44.90 | 35.28 | 31.92 | 41.33 | ||||||
| 1981 | 30.80 | d | 31.71 | 37.82 | f | 44.02 | a | 47.08 | ----- | z | 56.63 | 62.00 | 55.34 | e | 43.02 | e | 34.43 | 31.12 | b | 43.62 | ||||||
| 1982 | 23.37 | 30.25 | 34.63 | 35.55 | 47.03 | 54.77 | 59.39 | v | 59.40 | 50.93 | 42.44 | 28.35 | 26.60 | 39.39 | ||||||||||||
| 1983 | 32.44 | 34.62 | 37.73 | 38.87 | o | 49.08 | 53.02 | 58.21 | 62.02 | 52.75 | v | 45.21 | 35.03 | 25.82 | 43.32 | |||||||||||
| 1984 | 25.31 | 31.90 | 38.92 | 39.20 | 48.19 | b | 50.82 | 62.55 | a | 60.40 | 51.72 | 41.11 | 32.17 | 23.63 | l | 43.84 | ||||||||||
| 1985 | 22.61 | 28.61 | 32.30 | a | 44.50 | 49.41 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.49 | ||||
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.87 | 55.32 | 61.82 | 46.77 | 42.81 | 35.88 | 26.37 | 46.83 | ||||||||
| 1987 | 22.40 | 30.84 | 36.18 | 46.05 | a | 50.92 | 58.03 | 56.56 | d | ----- | z | ----- | z | 45.34 | 33.42 | 25.76 | 40.55 | |||||||||
| 1988 | 25.00 | p | 33.24 | 36.29 | 43.72 | 46.39 | 55.23 | 61.39 | 57.61 | m | 52.47 | a | 48.02 | 31.05 | 22.18 | 43.00 | ||||||||||
| 1989 | 24.63 | 18.77 | 35.43 | a | 43.52 | 45.44 | 54.82 | 58.81 | 57.05 | j | 49.64 | h | 41.08 | 34.11 | k | 26.44 | 38.77 | |||||||||
| 1990 | 30.18 | 25.45 | 35.19 | 44.93 | 43.50 | 52.39 | k | ----- | z | 56.55 | k | ----- | z | ----- | z | 32.52 | 14.85 | 32.37 | ||||||||
| 1991 | 26.53 | 36.32 | 32.68 | 37.10 | ----- | z | 49.52 | 61.34 | ----- | z | 54.32 | 42.69 | 37.53 | 27.79 | 40.58 | |||||||||||
| 1992 | 25.48 | 36.03 | 38.15 | 43.28 | 52.06 | 57.55 | h | 60.74 | 61.06 | 49.23 | 42.71 | 29.45 | 18.61 | 41.53 | ||||||||||||
| 1993 | ----- | z | ----- | z | 34.95 | 37.80 | 50.23 | 51.10 | 51.42 | 55.24 | 51.50 | 43.82 | 24.32 | 26.47 | 42.68 | |||||||||||
| 1994 | 30.55 | 28.14 | 35.84 | 41.93 | 49.60 | 54.10 | 62.27 | 58.08 | 53.20 | 38.87 | 21.78 | 23.61 | 41.50 | |||||||||||||
| 1995 | 30.71 | 36.25 | 31.00 | 37.20 | 46.84 | 54.45 | ----- | z | ----- | z | ----- | z | ----- | z | 35.80 | ----- | z | 38.89 | ||||||||
| 1996 | ----- | z | ----- | z | ----- | z | 40.78 | 45.52 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.15 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 26.71 | 30.89 | 35.23 | 40.36 | 47.41 | 53.90 | 60.58 | 58.78 | 51.67 | 43.64 | 33.70 | 27.20 | 42.41 | |||||||||||||
| S.D. | 4.76 | 4.15 | 2.76 | 3.18 | 2.78 | 2.79 | 2.49 | 2.12 | 2.87 | 2.70 | 3.82 | 4.65 | 0.94 | |||||||||||||
| SKEW | -0.87 | -0.39 | 0.29 | -0.22 | 0.01 | 0.14 | -0.94 | -0.04 | -0.21 | -0.49 | -0.67 | -0.08 | 0.26 | |||||||||||||
| MAX | 35.74 | 41.69 | 42.50 | 47.23 | 53.18 | 60.28 | 66.11 | 63.73 | 57.73 | 50.15 | 42.02 | 38.89 | 44.11 | |||||||||||||
| MIN | 13.15 | 18.77 | 29.92 | 32.83 | 41.69 | 46.93 | 51.42 | 53.00 | 44.68 | 36.19 | 21.78 | 14.85 | 41.07 | |||||||||||||
| NO YRS | 61 | 63 | 65 | 68 | 67 | 63 | 62 | 59 | 60 | 61 | 61 | 63 | 11 | |||||||||||||