| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.10 | u | 9999.00 | |
| 1923 | 34.18 | 28.18 | 41.77 | 47.10 | 53.71 | 58.05 | 69.26 | 69.63 | 62.55 | 48.85 | 42.88 | 34.03 | 49.18 | |||||||||||||
| 1924 | 28.21 | 41.64 | 39.23 | a | 47.75 | 61.08 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.58 | |||||
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.00 | z | 65.38 | g | 58.93 | 49.89 | 39.60 | 35.92 | 46.08 | |||||
| 1926 | 31.63 | 39.73 | 45.37 | 52.37 | 53.39 | 65.18 | 70.53 | 66.58 | 53.55 | 50.18 | a | 40.57 | 31.23 | 50.03 | ||||||||||||
| 1927 | 26.00 | 35.89 | 37.23 | 44.05 | 49.58 | 61.60 | 68.63 | 67.85 | 55.45 | 49.79 | 42.42 | 27.27 | 47.15 | |||||||||||||
| 1928 | 28.66 | 33.60 | 41.60 | 43.20 | 57.55 | a | 58.50 | 69.00 | 66.85 | 60.63 | 49.31 | 39.22 | 29.23 | 48.11 | ||||||||||||
| 1929 | 22.66 | 21.11 | 39.79 | 41.98 | 54.85 | h | 61.24 | a | 67.10 | 71.48 | 57.88 | 53.45 | 40.36 | a | 37.50 | 46.78 | ||||||||||
| 1930 | 13.31 | 40.45 | 41.85 | 51.13 | 51.23 | 59.60 | 69.11 | 69.10 | 59.72 | 45.92 | 37.25 | 29.79 | 47.37 | |||||||||||||
| 1931 | 35.26 | 34.36 | 40.58 | 47.73 | 58.61 | 60.07 | 70.71 | 68.71 | 57.58 | 49.02 | 34.82 | 28.71 | 48.85 | |||||||||||||
| 1932 | 31.65 | a | 31.69 | 39.65 | 46.40 | 53.02 | 62.95 | 64.13 | 65.24 | 62.32 | 51.95 | 42.81 | a | 27.15 | 48.25 | |||||||||||
| 1933 | 30.56 | 28.93 | 39.71 | 45.53 | 48.18 | 61.88 | 70.21 | 69.06 | 54.67 | 53.97 | 41.77 | 39.65 | 48.68 | |||||||||||||
| 1934 | 39.26 | 40.25 | 48.77 | 55.00 | 57.39 | 62.77 | 67.16 | 69.02 | 58.30 | 50.90 | 41.74 | c | 33.24 | 51.98 | ||||||||||||
| 1935 | 31.95 | a | 34.62 | 37.10 | 43.07 | 54.29 | 61.27 | 67.29 | 66.61 | 64.53 | 50.22 | a | 36.13 | 28.95 | 48.00 | |||||||||||
| 1936 | 33.44 | 20.24 | 39.50 | 49.32 | 56.74 | 62.45 | 67.92 | 68.71 | 60.10 | 54.65 | a | 37.82 | 35.48 | 48.86 | ||||||||||||
| 1937 | 14.97 | 31.93 | 41.56 | 43.34 | b | 53.90 | 61.70 | 68.81 | 65.00 | a | 61.55 | 52.87 | 39.52 | 35.05 | 47.52 | |||||||||||
| 1938 | 32.19 | 31.39 | 38.95 | 46.08 | 52.84 | 61.78 | 69.94 | 63.18 | 61.43 | 48.77 | 33.92 | 33.06 | 47.80 | |||||||||||||
| 1939 | 35.19 | 29.89 | 41.18 | 46.42 | 55.66 | 57.17 | 69.06 | 69.60 | 61.03 | 49.50 | 43.25 | 37.84 | 49.65 | |||||||||||||
| 1940 | 28.06 | 37.10 | 44.66 | 46.62 | 56.77 | 65.13 | 67.83 | a | 68.53 | 60.63 | 51.97 | 35.27 | 34.71 | 49.77 | ||||||||||||
| 1941 | 31.66 | 37.57 | a | 44.79 | 49.42 | 52.76 | 59.60 | 71.71 | 66.55 | 55.35 | 48.02 | c | 42.47 | 34.61 | 49.54 | |||||||||||
| 1942 | 21.05 | 33.07 | 38.48 | 47.33 | 50.58 | 56.57 | 70.10 | 69.48 | 62.50 | 52.77 | 37.10 | 35.71 | 47.90 | |||||||||||||
| 1943 | 23.40 | 33.52 | 37.44 | 48.12 | 48.76 | 55.22 | 67.94 | 63.95 | 64.13 | 51.08 | 37.65 | 29.84 | 46.75 | |||||||||||||
| 1944 | 29.69 | 32.17 | 38.56 | 44.92 | 52.95 | 58.27 | 67.06 | 64.58 | 62.42 | 54.52 | 35.93 | 27.42 | 47.37 | |||||||||||||
| 1945 | 33.44 | 35.29 | 37.23 | 43.68 | 54.05 | 58.42 | 69.16 | 68.92 | 58.17 | 52.97 | 38.48 | 31.85 | 48.47 | |||||||||||||
| 1946 | 35.23 | 36.93 | 39.65 | 46.70 | 55.34 | 58.37 | 67.44 | 67.84 | 57.83 | 44.87 | 35.38 | 34.66 | 48.35 | |||||||||||||
| 1947 | 30.21 | 38.66 | 45.18 | 49.68 | 59.58 | 57.42 | 64.89 | 64.32 | 60.88 | 48.60 | 38.27 | 36.21 | 49.49 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.15 | a | 63.06 | 57.17 | 47.40 | 38.18 | 27.69 | 49.44 | ||||||
| 1949 | 17.29 | 30.57 | 39.31 | 48.84 | h | 57.58 | 60.77 | d | 65.81 | 65.29 | 59.15 | g | 44.58 | g | 43.78 | 32.08 | e | 45.83 | ||||||||
| 1950 | 16.71 | s | 29.69 | a | 37.13 | 43.18 | 51.35 | 59.35 | 67.87 | 68.74 | 62.45 | 48.04 | e | 38.91 | c | 37.18 | 49.44 | |||||||||
| 1951 | 27.72 | f | 33.84 | 34.68 | f | 48.15 | 51.97 | 62.62 | e | 69.06 | 66.23 | 61.88 | m | 47.89 | 36.93 | 29.35 | 49.56 | |||||||||
| 1952 | 26.50 | 36.07 | 37.55 | 48.00 | 53.97 | 58.65 | c | 69.23 | 67.55 | 64.52 | 56.32 | 33.25 | 30.89 | 48.54 | ||||||||||||
| 1953 | 40.61 | 37.88 | c | 39.89 | 43.52 | 49.29 | 53.38 | 67.93 | c | 65.61 | 62.33 | 56.48 | 42.57 | 36.85 | 49.70 | |||||||||||
| 1954 | 30.58 | 36.43 | 35.94 | 45.42 | 53.89 | 56.79 | d | 64.73 | c | 61.71 | b | 57.93 | 46.02 | d | 43.41 | a | 31.21 | 47.00 | ||||||||
| 1955 | 31.48 | 32.86 | 34.15 | a | 39.75 | 49.17 | a | 60.23 | 63.10 | 67.30 | a | 60.50 | 50.06 | 33.27 | 30.71 | 46.05 | ||||||||||
| 1956 | 31.52 | 27.78 | 39.15 | d | 48.48 | b | 55.45 | b | 57.67 | c | 70.29 | 66.42 | 61.82 | 47.18 | 35.67 | 34.65 | 48.00 | |||||||||
| 1957 | 17.08 | 32.86 | 39.10 | 46.37 | 55.90 | 62.15 | 65.29 | 63.37 | 62.72 | 45.65 | 38.93 | a | 38.50 | 47.33 | ||||||||||||
| 1958 | 33.97 | 41.86 | 38.21 | 44.50 | 59.74 | 63.33 | 71.97 | a | 72.88 | a | 58.93 | 52.77 | 38.03 | a | 36.50 | 51.06 | ||||||||||
| 1959 | 33.31 | 32.88 | 40.40 | 46.48 | 48.77 | 59.80 | 69.68 | a | 65.05 | 56.68 | 50.73 | 40.25 | d | 32.21 | 48.02 | |||||||||||
| 1960 | 24.97 | 34.12 | 41.73 | ----- | z | ----- | z | 61.17 | 72.84 | 64.25 | a | 61.38 | 52.58 | 38.93 | 30.18 | 48.21 | ||||||||||
| 1961 | 33.84 | 40.41 | 40.87 | 45.68 | b | 51.52 | 66.32 | 70.61 | 73.48 | b | 56.29 | a | 47.61 | 34.87 | 33.58 | 49.59 | ||||||||||
| 1962 | 30.19 | 35.04 | 37.65 | 49.60 | 47.66 | 59.52 | 66.95 | 64.90 | a | 62.03 | 49.81 | 40.82 | 36.05 | 48.35 | ||||||||||||
| 1963 | 26.85 | 41.70 | 41.05 | 42.03 | 50.76 | 56.93 | a | 62.11 | 67.43 | b | 60.97 | a | 47.68 | l | 39.88 | a | 31.35 | 47.37 | ||||||||
| 1964 | 33.97 | 37.47 | 37.53 | a | 42.97 | 49.95 | 57.78 | 66.92 | 62.74 | 56.80 | 48.53 | a | 34.05 | 29.67 | a | 46.53 | ||||||||||
| 1965 | 31.94 | 38.34 | 36.28 | a | 42.29 | f | 49.27 | t | 58.40 | 68.50 | 66.50 | 55.68 | 55.11 | 41.30 | 33.31 | 48.54 | ||||||||||
| 1966 | 32.92 | 34.86 | 40.13 | 47.05 | 55.15 | 57.83 | 64.34 | 66.81 | 61.17 | 50.50 | 40.37 | 36.39 | 48.96 | |||||||||||||
| 1967 | 37.10 | 38.91 | 38.37 | 40.35 | 53.26 | 63.13 | 70.64 | c | 73.52 | 65.40 | a | 50.55 | a | 40.17 | d | 31.44 | e | 50.24 | ||||||||
| 1968 | 33.37 | 38.71 | 43.65 | 43.75 | 52.71 | 60.88 | 70.02 | a | 63.98 | a | 59.65 | 47.32 | 38.53 | 28.85 | 48.45 | |||||||||||
| 1969 | 20.65 | 29.43 | 40.23 | 44.82 | 56.81 | 64.10 | 66.65 | 64.56 | 59.83 | 45.66 | 41.43 | 31.34 | 47.12 | |||||||||||||
| 1970 | 30.84 | 36.39 | 38.92 | 40.40 | 52.39 | 64.92 | 69.11 | 68.42 | 53.68 | 46.69 | 38.02 | 32.42 | 47.68 | |||||||||||||
| 1971 | 36.05 | 37.25 | 36.81 | 43.42 | 53.47 | 55.40 | 69.32 | 70.08 | 53.97 | 47.20 | c | 39.19 | c | 32.89 | 47.92 | |||||||||||
| 1972 | 30.35 | 34.67 | 42.41 | b | 41.53 | 54.31 | 60.70 | 68.53 | a | 69.79 | 55.44 | d | 47.47 | 38.88 | 23.90 | a | 47.33 | |||||||||
| 1973 | 27.48 | 34.68 | 39.82 | a | 45.70 | 54.52 | 59.75 | l | 68.90 | 65.06 | 58.85 | 48.48 | b | 35.62 | 36.13 | a | 46.84 | |||||||||
| 1974 | 24.52 | 37.11 | 39.22 | a | 43.32 | 48.00 | b | 61.20 | o | 65.75 | g | 67.54 | h | 62.82 | e | 50.34 | 39.35 | 33.82 | 42.05 | |||||||
| 1975 | 31.60 | b | 28.90 | c | 35.18 | a | 37.83 | d | 49.95 | b | 56.17 | 70.32 | a | 63.38 | b | 61.43 | 47.91 | c | 37.30 | 36.13 | 46.34 | |||||
| 1976 | 35.02 | b | 33.93 | 37.02 | h | 42.50 | c | 51.45 | 52.09 | n | 66.57 | h | 62.61 | 61.98 | d | 51.10 | 41.16 | a | 34.25 | a | 46.00 | |||||
| 1977 | 27.79 | b | 35.71 | 38.61 | 49.66 | a | 48.41 | b | 60.97 | o | 65.74 | b | 71.97 | 54.82 | 48.33 | a | 35.02 | c | 32.44 | 46.23 | ||||||
| 1978 | 30.70 | a | 35.81 | b | 43.53 | 43.72 | 48.74 | b | 60.13 | c | 70.43 | q | 66.03 | 56.12 | 49.98 | 31.92 | d | 26.77 | 44.86 | |||||||
| 1979 | 15.18 | 32.80 | c | 42.39 | 44.95 | 54.00 | 60.38 | d | 67.89 | d | 68.10 | j | 62.82 | 53.00 | a | 32.85 | d | 35.74 | 45.64 | |||||||
| 1980 | 24.53 | 32.91 | b | 38.61 | 47.40 | 51.28 | a | 54.21 | d | 66.23 | c | 63.75 | g | 59.68 | b | 49.31 | 38.72 | 35.76 | j | 46.29 | ||||||
| 1981 | 31.62 | b | 33.79 | 41.50 | d | 44.63 | 51.48 | 59.27 | o | 65.58 | 71.10 | 60.63 | 47.35 | 40.13 | g | 33.15 | a | 48.08 | ||||||||
| 1982 | 30.03 | 32.84 | 39.21 | 41.68 | 51.74 | 55.66 | n | 65.06 | 68.00 | 58.57 | 48.34 | 35.20 | 31.63 | 45.66 | ||||||||||||
| 1983 | 37.44 | 39.52 | 44.42 | 45.20 | 56.42 | 57.17 | l | 62.76 | 69.18 | 56.70 | 51.27 | 41.95 | 22.13 | 47.91 | ||||||||||||
| 1984 | 34.19 | 37.76 | 43.53 | 43.15 | 49.42 | 56.52 | 68.52 | 68.42 | 58.47 | m | 45.90 | 37.32 | 26.93 | i | 48.47 | |||||||||||
| 1985 | 23.74 | 32.50 | j | 39.39 | 49.40 | 54.87 | 62.38 | 73.60 | 65.92 | 54.52 | 47.06 | 26.37 | 16.81 | m | 49.72 | |||||||||||
| 1986 | 34.22 | a | 36.43 | 46.21 | 44.45 | 53.32 | 67.08 | 63.53 | a | 72.52 | 55.32 | 52.03 | 40.38 | b | 29.39 | 49.57 | ||||||||||
| 1987 | 29.74 | 37.02 | 41.34 | 51.45 | 57.13 | 64.00 | 64.84 | 67.52 | 64.30 | 54.77 | 40.60 | 28.98 | 50.14 | |||||||||||||
| 1988 | 29.32 | 38.22 | 41.08 | 48.52 | 51.61 | 58.68 | 68.84 | 66.81 | 60.87 | 58.32 | 40.03 | 33.02 | 49.61 | |||||||||||||
| 1989 | 35.03 | 22.95 | 38.55 | 49.55 | 52.11 | 62.67 | 66.35 | 64.89 | 61.90 | 50.39 | 43.93 | 33.68 | 48.50 | |||||||||||||
| 1990 | 35.65 | 35.15 | e | 43.11 | 51.67 | 51.56 | 60.67 | 71.74 | 69.48 | 66.13 | 49.27 | 42.95 | 24.71 | 50.18 | ||||||||||||
| 1991 | 32.00 | 42.96 | 38.95 | 45.42 | 49.82 | 56.60 | 69.13 | 71.03 | 64.97 | 52.39 | 39.30 | 34.06 | 49.72 | |||||||||||||
| 1992 | 36.27 | 41.12 | a | 45.85 | 49.75 | 58.82 | 66.92 | 67.82 | 71.06 | 59.38 | a | 53.29 | 38.40 | 29.08 | 51.48 | |||||||||||
| 1993 | 22.81 | 26.55 | 39.94 | 45.45 | 57.92 | 57.93 | 59.98 | 65.31 | 62.68 | 54.31 | 33.37 | 32.03 | 46.52 | |||||||||||||
| 1994 | 39.40 | 32.30 | 44.74 | 49.27 | 55.63 | 59.72 | 71.53 | 67.68 | 65.25 | 48.68 | 34.93 | 33.23 | 50.20 | |||||||||||||
| 1995 | 30.40 | 39.73 | 40.60 | 44.95 | 54.68 | 58.70 | 67.32 | 64.71 | 63.52 | 48.31 | 43.85 | 31.13 | 48.99 | |||||||||||||
| 1996 | 33.50 | 30.78 | 40.61 | 47.20 | 49.06 | 59.23 | 71.66 | 69.11 | 59.03 | 49.89 | 38.87 | 32.27 | 48.44 | |||||||||||||
| 1997 | 32.69 | 35.84 | 42.16 | 45.27 | 57.44 | 58.78 | 67.08 | 70.31 | 61.65 | 49.94 | 40.50 | 33.58 | 49.60 | |||||||||||||
| 1998 | 34.00 | 38.68 | 42.42 | 46.13 | 52.02 | 60.52 | 73.19 | 70.90 | 66.52 | 49.42 | 41.72 | 33.00 | 50.71 | |||||||||||||
| 1999 | 38.48 | 37.93 | 40.69 | 44.38 | b | 50.21 | c | 59.47 | 66.78 | a | 69.74 | 61.07 | 51.15 | 44.68 | 35.19 | 49.98 | ||||||||||
| 2000 | 30.73 | 35.67 | 41.47 | 50.55 | 54.29 | 61.85 | 67.15 | 67.66 | 60.78 | 49.19 | 32.80 | 30.32 | 48.54 | |||||||||||||
| 2001 | 31.85 | 33.52 | 43.02 | 44.27 | 57.76 | 59.03 | 68.03 | 70.98 | 64.30 | 50.13 | 41.23 | 32.45 | 49.71 | |||||||||||||
| 2002 | 33.89 | 37.62 | 37.56 | 47.07 | 52.27 | 62.65 | 70.52 | 66.10 | 61.52 | 47.56 | 39.58 | 33.84 | 49.18 | |||||||||||||
| 2003 | 37.05 | 35.96 | 44.71 | 44.62 | 52.65 | 62.50 | 72.05 | 69.66 | 63.45 | 54.50 | 34.77 | 32.47 | 50.36 | |||||||||||||
| 2004 | 26.55 | 35.07 | 45.23 | 48.20 | ----- | z | 61.37 | 70.15 | 70.05 | 58.82 | 50.95 | ----- | z | ----- | z | 51.82 | ||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 30.32 | 34.78 | 40.51 | 45.97 | 53.31 | 60.21 | 68.08 | 67.50 | 60.13 | 50.18 | 38.59 | 32.38 | 48.72 | |||||||||||||
| S.D. | 5.76 | 4.46 | 2.82 | 3.14 | 3.19 | 2.91 | 2.70 | 2.78 | 3.21 | 2.82 | 3.41 | 3.40 | 1.32 | |||||||||||||
| SKEW | -1.01 | -0.92 | 0.43 | 0.15 | 0.26 | 0.17 | -0.47 | 0.08 | -0.25 | 0.53 | -0.67 | -0.49 | 0.13 | |||||||||||||
| MAX | 40.61 | 42.96 | 48.77 | 55.00 | 61.08 | 67.08 | 73.60 | 73.52 | 66.52 | 58.32 | 44.68 | 39.65 | 51.98 | |||||||||||||
| MIN | 13.31 | 20.24 | 34.15 | 37.83 | 47.66 | 53.38 | 59.98 | 61.71 | 53.55 | 44.87 | 26.37 | 22.13 | 46.05 | |||||||||||||
| NO YRS | 78 | 79 | 78 | 77 | 76 | 72 | 77 | 77 | 78 | 79 | 79 | 77 | 59 | |||||||||||||