| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.68 | ----- | z | 70.08 | ----- | z | 42.44 | ----- | z | 27.65 | 50.21 | |||||
| 1930 | 5.24 | 28.86 | 30.24 | 40.35 | 41.20 | d | 61.79 | i | 70.53 | 68.55 | 57.05 | 44.02 | 32.92 | 21.98 | 40.09 | |||||||||||
| 1931 | 26.95 | 33.09 | 39.94 | 46.02 | 54.89 | 62.38 | 72.03 | 68.65 | 55.30 | 47.19 | 30.12 | 22.52 | 46.59 | |||||||||||||
| 1932 | 22.63 | a | 20.17 | 37.63 | 45.50 | 52.90 | 60.90 | 66.90 | 64.21 | 58.40 | 46.31 | 39.48 | 20.18 | 44.60 | ||||||||||||
| 1933 | 23.11 | 19.20 | 37.23 | 43.85 | 48.66 | 64.77 | 70.52 | 65.84 | 55.57 | 50.40 | 36.82 | 38.02 | 46.16 | |||||||||||||
| 1934 | 35.68 | 37.75 | 46.13 | 49.83 | 58.31 | 58.98 | 68.68 | 67.27 | 55.47 | 47.29 | 37.58 | 23.06 | 48.84 | |||||||||||||
| 1935 | 22.79 | 23.68 | 31.73 | 41.57 | 47.60 | 56.80 | 64.00 | 65.23 | 58.62 | 45.73 | 31.53 | 28.37 | 43.14 | |||||||||||||
| 1936 | 26.73 | 29.23 | a | 40.32 | 49.70 | 57.39 | 63.53 | 72.15 | a | 69.84 | 56.17 | 49.06 | 32.46 | c | 29.84 | 48.04 | ||||||||||
| 1937 | 10.68 | 25.66 | 38.05 | 44.10 | 55.45 | 59.27 | 70.35 | 65.95 | 59.70 | 48.68 | 41.02 | 34.10 | 46.08 | |||||||||||||
| 1938 | 29.65 | 32.96 | 34.77 | 46.50 | 50.68 | 60.65 | 69.11 | 65.55 | 62.52 | 48.18 | 32.27 | 31.00 | 46.99 | |||||||||||||
| 1939 | 30.62 | a | 23.75 | 38.23 | 48.25 | 55.71 | 58.00 | 70.39 | ----- | z | 57.93 | 46.31 | 37.52 | 37.13 | 45.80 | |||||||||||
| 1940 | 31.10 | 34.62 | 41.00 | 45.43 | 55.97 | 65.03 | 68.94 | 68.26 | 56.98 | 48.87 | 31.37 | 34.74 | 48.53 | |||||||||||||
| 1941 | 28.87 | 36.52 | 41.50 | 45.07 | 55.15 | 59.67 | 70.89 | 67.31 | 53.73 | 47.11 | 40.77 | 32.56 | 48.26 | |||||||||||||
| 1942 | 19.40 | 27.77 | 37.23 | 47.77 | 49.20 | a | 57.30 | 70.73 | 67.23 | 59.03 | 49.26 | 38.02 | 32.56 | 46.29 | ||||||||||||
| 1943 | 28.37 | 33.70 | 39.16 | 51.05 | 51.13 | 57.33 | 67.82 | 66.08 | 62.77 | 49.61 | 38.15 | 30.55 | 47.98 | |||||||||||||
| 1944 | 23.97 | 31.90 | 37.02 | 44.62 | 53.53 | 57.02 | 66.82 | 65.44 | 58.53 | 52.42 | 33.78 | 29.10 | 46.18 | |||||||||||||
| 1945 | 29.08 | a | 35.89 | 36.40 | 43.67 | 53.15 | 57.90 | 70.65 | 67.95 | 55.88 | 51.74 | 34.93 | 29.47 | 47.23 | ||||||||||||
| 1946 | 27.40 | 31.89 | 40.85 | 49.30 | 52.37 | 60.22 | 69.50 | 68.53 | 55.38 | 40.40 | 33.28 | 32.90 | 46.84 | |||||||||||||
| 1947 | 20.81 | 36.18 | 40.89 | 45.57 | 58.61 | 57.46 | b | 68.77 | 66.97 | 59.25 | 50.97 | 34.12 | 28.58 | 47.35 | ||||||||||||
| 1948 | 32.08 | 30.93 | 33.98 | 43.13 | 51.84 | 61.30 | 66.45 | 64.66 | 56.09 | a | 47.48 | a | 34.17 | 20.37 | a | 45.21 | ||||||||||
| 1949 | 7.08 | 26.31 | a | 37.82 | 48.73 | 56.77 | 62.93 | 68.62 | a | 67.03 | 60.40 | 42.15 | a | 41.67 | 25.53 | 45.42 | ||||||||||
| 1950 | 21.07 | a | 33.02 | a | 35.85 | a | 43.80 | 50.34 | 60.16 | a | 69.34 | 67.40 | 58.78 | a | 51.73 | 40.52 | 35.81 | 47.32 | ||||||||
| 1951 | 25.23 | a | 34.82 | 34.15 | 48.15 | 54.74 | 57.57 | 68.84 | 66.60 | a | 59.10 | 45.58 | 35.77 | 25.08 | 46.30 | |||||||||||
| 1952 | 23.94 | 26.17 | 32.69 | b | 49.00 | 53.89 | 59.48 | 68.15 | 66.79 | 60.30 | 52.10 | 30.93 | a | 30.76 | 46.18 | |||||||||||
| 1953 | 38.92 | 35.41 | 39.47 | 44.07 | 50.43 | d | 56.48 | a | 69.08 | 67.35 | 60.23 | 48.58 | 42.22 | 30.63 | 48.57 | |||||||||||
| 1954 | 32.70 | a | 37.50 | 35.76 | 47.88 | 57.50 | 57.92 | 69.89 | 63.44 | 56.05 | 46.07 | a | 40.17 | 24.65 | a | 47.46 | ||||||||||
| 1955 | 19.00 | 22.91 | 32.45 | 40.55 | 50.38 | a | 61.32 | 66.60 | 68.40 | 56.70 | 48.53 | 34.67 | 32.97 | 44.54 | ||||||||||||
| 1956 | 30.90 | 26.84 | 38.90 | 47.02 | b | 56.24 | b | 60.68 | 70.06 | 64.29 | 57.36 | a | 46.40 | 31.00 | v | 28.31 | e | 47.91 | ||||||||
| 1957 | 19.55 | a | 32.08 | b | 40.05 | c | 44.14 | a | 52.82 | 62.21 | a | 66.65 | 64.37 | 58.59 | b | 45.34 | f | 34.17 | 33.29 | 46.17 | ||||||
| 1958 | 28.19 | 39.70 | a | 35.76 | b | 43.63 | 58.45 | b | 61.20 | 67.53 | 69.72 | a | 57.43 | b | 50.73 | 37.98 | 36.52 | 48.90 | ||||||||
| 1959 | 33.19 | 31.68 | 38.10 | 47.20 | 48.76 | 63.47 | 70.52 | 66.32 | l | 55.18 | 48.98 | 36.15 | 26.66 | 45.44 | ||||||||||||
| 1960 | 21.85 | 29.67 | 39.61 | 45.85 | 51.16 | 62.80 | 71.63 | 62.95 | 59.92 | 46.82 | 37.25 | 29.61 | 46.59 | |||||||||||||
| 1961 | 31.40 | 38.46 | 39.74 | 43.08 | 52.42 | 67.32 | 69.47 | 71.82 | 53.35 | 46.73 | 34.38 | 28.31 | 48.04 | |||||||||||||
| 1962 | 20.46 | c | 29.96 | 35.03 | 48.92 | 50.67 | a | 62.69 | f | 65.63 | 64.57 | a | 60.07 | a | 48.06 | 38.73 | d | 34.53 | 45.15 | |||||||
| 1963 | 25.83 | e | 39.69 | d | 38.92 | a | 40.73 | 54.31 | 58.65 | d | 64.60 | 66.48 | 62.45 | i | 54.55 | j | 40.22 | c | 30.52 | b | 45.99 | |||||
| 1964 | 25.98 | 27.19 | 35.11 | h | 40.80 | 49.79 | 57.38 | 67.95 | 65.15 | d | 54.07 | 49.04 | c | 34.70 | 30.85 | e | 45.72 | |||||||||
| 1965 | 28.91 | c | 35.91 | 35.08 | 46.98 | d | 47.59 | c | 58.48 | 65.75 | c | 63.68 | 50.46 | c | 50.15 | 37.48 | c | 28.20 | d | 45.72 | ||||||
| 1966 | 26.84 | 28.22 | a | 37.67 | a | 45.67 | c | 56.12 | k | 57.61 | g | 66.60 | 66.27 | 62.86 | h | 44.50 | e | 38.83 | f | 30.08 | f | 45.11 | ||||
| 1967 | 31.71 | b | 37.46 | a | 37.76 | j | 38.71 | d | 51.83 | k | 60.79 | b | 72.13 | 72.10 | 62.28 | 46.44 | n | 39.23 | f | 18.15 | r | 53.60 | ||||
| 1968 | ----- | z | ----- | z | 39.90 | j | 41.50 | c | 51.19 | o | 61.17 | c | 71.74 | l | 62.66 | c | 57.23 | b | 47.17 | a | 38.90 | j | 27.96 | q | 53.95 | |
| 1969 | 30.73 | 32.00 | f | 36.07 | h | 43.45 | t | 54.56 | o | 60.92 | d | 68.97 | a | 68.48 | e | ----- | z | 41.40 | f | 35.97 | o | 31.97 | n | 57.27 | ||
| 1970 | 31.64 | i | 38.35 | e | 36.25 | q | 38.24 | i | 48.94 | o | 60.71 | d | 68.96 | c | 69.04 | q | 54.81 | n | 44.09 | n | 38.62 | m | 27.16 | l | 56.01 | |
| 1971 | 29.78 | h | 36.42 | p | ----- | z | 44.00 | o | 53.33 | s | 57.71 | i | 69.29 | j | 70.30 | h | 52.42 | k | 43.79 | q | 35.89 | p | 23.22 | m | 9999.00 | |
| 1972 | 25.33 | h | ----- | z | 42.63 | l | 43.74 | g | 56.68 | a | 63.02 | a | 67.38 | f | 67.24 | d | 54.48 | f | 45.19 | b | 35.52 | c | 21.15 | a | 48.13 | |
| 1973 | 24.02 | e | 34.33 | b | 36.77 | g | 42.35 | c | 54.79 | e | 61.59 | a | 67.95 | a | 65.88 | c | 57.02 | a | 46.95 | k | 34.50 | h | 33.24 | n | 50.99 | |
| 1974 | 22.83 | h | 32.35 | k | 36.17 | j | 42.24 | g | 50.09 | c | 65.48 | b | 67.76 | b | 66.07 | h | 58.21 | b | 47.94 | e | 38.45 | k | 26.79 | j | 57.90 | |
| 1975 | 21.27 | p | 33.14 | j | 39.23 | r | 37.52 | i | 50.83 | m | 58.97 | j | 71.22 | a | 64.38 | j | 58.93 | c | 48.06 | n | 34.52 | i | 32.89 | m | 65.07 | |
| 1976 | 28.72 | o | 34.11 | o | 34.44 | m | 43.64 | e | 55.59 | i | 58.70 | b | 68.95 | c | 62.14 | c | 58.68 | k | 43.04 | r | 38.06 | l | 28.17 | j | 58.36 | |
| 1977 | 21.42 | e | 33.47 | i | 34.00 | r | 49.90 | j | 46.85 | h | 66.74 | a | 69.04 | f | 69.35 | g | 57.70 | c | 47.42 | e | 35.05 | j | 36.50 | j | 48.32 | |
| 1978 | 32.39 | c | 34.42 | h | 44.17 | k | 43.22 | e | 49.04 | g | 58.28 | c | 67.97 | 66.92 | g | 55.00 | a | 48.05 | c | 31.06 | m | 23.76 | b | 46.95 | ||
| 1979 | 13.66 | i | 33.28 | h | 39.59 | h | 45.07 | c | 53.04 | h | 61.59 | b | 69.56 | d | 66.95 | b | 60.32 | b | 49.39 | d | 30.77 | 32.03 | m | 54.81 | ||
| 1980 | 29.30 | f | 39.47 | m | 36.25 | k | 46.18 | k | 50.89 | h | 55.56 | f | 67.93 | a | 63.57 | c | 57.44 | e | 46.00 | b | 37.32 | b | 31.17 | e | 50.57 | |
| 1981 | 29.65 | k | 31.55 | g | 38.15 | u | ----- | z | ----- | z | 58.69 | n | 65.81 | 68.28 | d | 57.53 | k | 42.94 | f | 38.26 | c | 33.64 | i | 57.45 | ||
| 1982 | 23.27 | a | 29.03 | j | 35.94 | 40.88 | 50.11 | 60.55 | 66.68 | 66.88 | b | 55.32 | 44.88 | k | 29.52 | j | 27.94 | 47.51 | ||||||||
| 1983 | 32.65 | 38.32 | 40.31 | 41.02 | b | 52.58 | 59.58 | 65.42 | 68.71 | 57.52 | 49.92 | l | 37.13 | k | 22.09 | n | 50.68 | |||||||||
| 1984 | 13.82 | k | 26.22 | t | 32.17 | z | 44.86 | p | 53.17 | j | 57.85 | 71.23 | 69.44 | o | 57.03 | 42.00 | p | 37.78 | n | 23.44 | 52.39 | |||||
| 1985 | 20.71 | 28.93 | m | 35.22 | k | 49.08 | 54.34 | 62.38 | 72.73 | 63.97 | l | 50.30 | g | 44.55 | 26.57 | 18.62 | r | 47.19 | ||||||||
| 1986 | 34.65 | r | 38.19 | t | 45.20 | k | 44.97 | 52.95 | k | 65.58 | 65.32 | a | 71.10 | a | 53.87 | 46.34 | i | 40.41 | s | 27.71 | 54.76 | |||||
| 1987 | 24.03 | 35.29 | 40.48 | 51.15 | 55.79 | 63.25 | 64.16 | 64.35 | 58.78 | 49.34 | 36.37 | 27.95 | a | 47.58 | ||||||||||||
| 1988 | 23.26 | b | 35.00 | 40.29 | 46.50 | 52.97 | 64.31 | a | 70.08 | 65.65 | h | 57.14 | p | 53.82 | t | 34.27 | o | ----- | z | 47.49 | ||||||
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | 43.85 | ----- | z | 72.10 | 65.87 | 58.22 | 46.61 | 36.17 | f | 27.95 | 52.43 | |||||||
| 1990 | 24.39 | ----- | z | 38.24 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.28 | 17.77 | 28.92 | |||||
| 1991 | ----- | z | 36.57 | ----- | z | 41.63 | 48.34 | 56.32 | p | ----- | z | ----- | z | ----- | z | ----- | z | 35.53 | ----- | z | 40.52 | |||||
| 1992 | ----- | z | ----- | z | 41.21 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.63 | 30.63 | ||
| 1994 | 32.24 | 29.48 | 40.79 | 46.60 | 55.31 | 61.22 | 68.92 | 66.19 | 58.55 | 45.11 | 28.88 | 26.11 | 46.62 | |||||||||||||
| 1995 | 34.45 | 39.45 | 39.60 | 43.95 | 52.76 | 56.93 | 65.47 | 62.58 | 58.00 | 44.76 | 41.90 | 31.03 | 47.57 | |||||||||||||
| 1996 | 30.89 | 30.90 | 39.76 | 45.58 | 50.84 | 60.37 | 68.82 | 66.08 | 53.82 | 46.39 | 37.80 | 32.87 | a | 47.01 | ||||||||||||
| 1997 | 29.97 | 33.20 | 41.18 | 43.07 | 56.21 | 59.37 | 65.35 | 66.00 | 58.98 | 44.45 | 38.40 | 27.23 | 46.95 | |||||||||||||
| 1998 | 36.03 | 35.18 | 39.94 | 43.78 | 49.47 | 56.35 | ----- | z | 68.18 | 61.03 | 43.94 | 38.05 | 25.24 | 45.20 | ||||||||||||
| 1999 | 30.19 | 32.46 | 37.63 | 41.52 | 50.42 | 57.45 | 66.08 | 66.68 | 55.58 | 47.84 | 41.00 | 27.70 | a | 46.21 | ||||||||||||
| 2000 | 31.28 | a | 38.32 | a | 37.72 | a | 49.62 | a | 54.58 | 62.83 | g | ----- | z | 67.13 | 55.75 | 45.22 | a | 29.77 | 27.37 | a | 43.68 | |||||
| 2001 | 20.58 | 29.54 | a | 41.12 | e | 42.32 | 55.79 | b | 60.35 | 68.95 | j | 68.39 | h | 59.13 | 46.57 | c | 37.10 | 27.89 | 42.04 | |||||||
| 2002 | 28.08 | ----- | z | 36.52 | 45.62 | 52.82 | 61.98 | 70.60 | 62.41 | i | ----- | z | 40.81 | 34.88 | 31.61 | 44.77 | ||||||||||
| 2003 | 35.85 | 31.62 | 40.81 | 41.98 | ----- | z | ----- | z | ----- | z | 66.31 | ----- | z | ----- | z | 31.75 | 32.05 | 40.05 | ||||||||
| 2004 | 25.68 | 28.00 | 42.66 | 46.57 | 50.76 | ----- | z | ----- | z | ----- | z | ----- | z | 36.95 | t | 32.15 | 29.95 | 36.54 | ||||||||
| 2005 | 26.32 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.32 | ||
| 2006 | ----- | z | 31.80 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.80 | ||
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2010 | ----- | z | ----- | z | 38.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.25 | 30.44 | 33.85 | ||||
| 2011 | 26.31 | 31.72 | c | 37.45 | 39.39 | b | 46.27 | 55.27 | 66.58 | 69.22 | a | 61.77 | 46.72 | a | 33.69 | a | 26.66 | 45.09 | ||||||||
| 2012 | 30.00 | b | 32.76 | 39.23 | c | 46.07 | 50.52 | a | 57.53 | a | 71.68 | a | 69.38 | b | 58.77 | b | 45.60 | b | 38.41 | g | 30.39 | 48.36 | ||||
| 2013 | 20.32 | f | 32.50 | a | 38.55 | b | 49.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.53 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 26.49 | 32.10 | 38.15 | 44.97 | 52.50 | 60.42 | 68.60 | 66.70 | 57.64 | 47.17 | 35.72 | 28.90 | 46.75 | |||||||||||||
| S.D. | 6.39 | 4.88 | 2.88 | 3.02 | 3.58 | 2.74 | 2.21 | 2.22 | 2.44 | 2.64 | 3.62 | 4.29 | 1.31 | |||||||||||||
| SKEW | -1.03 | -0.57 | -0.41 | 0.07 | -0.60 | 0.45 | -0.19 | 0.16 | -0.23 | -0.27 | -0.20 | -0.30 | -0.53 | |||||||||||||
| MAX | 38.92 | 39.70 | 46.13 | 51.15 | 58.61 | 67.32 | 72.73 | 72.10 | 62.77 | 52.42 | 42.22 | 38.02 | 48.90 | |||||||||||||
| MIN | 5.24 | 19.20 | 30.24 | 38.71 | 41.20 | 55.27 | 64.00 | 62.14 | 50.46 | 40.40 | 26.57 | 17.77 | 43.14 | |||||||||||||
| NO YRS | 62 | 58 | 56 | 63 | 58 | 63 | 64 | 60 | 60 | 57 | 56 | 61 | 35 | |||||||||||||