| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.33 | ----- | z | 92.23 | ----- | z | 61.58 | ----- | z | 40.61 | 67.19 | |||||
| 1930 | 20.06 | 38.32 | 44.52 | 57.30 | 55.48 | 76.27 | 91.45 | 88.39 | 75.87 | 62.16 | 49.77 | 35.48 | 57.92 | |||||||||||||
| 1931 | 39.16 | 44.25 | 53.35 | 64.00 | 74.68 | 80.07 | 93.77 | 92.00 | 75.17 | 66.13 | 45.43 | 34.77 | 63.57 | |||||||||||||
| 1932 | 33.73 | a | 36.83 | 47.87 | 60.20 | 69.03 | 79.10 | 87.97 | 87.19 | 82.87 | 65.87 | 56.97 | 35.29 | 61.91 | ||||||||||||
| 1933 | 37.03 | 35.68 | 51.42 | 61.60 | 64.77 | 85.73 | 93.32 | 87.97 | 77.73 | 73.77 | 55.30 | 49.39 | 64.48 | |||||||||||||
| 1934 | 46.71 | 50.96 | 63.42 | 69.77 | 79.77 | 78.73 | 92.26 | 91.58 | 79.33 | 65.39 | 47.67 | 30.65 | 66.35 | |||||||||||||
| 1935 | 33.87 | 35.04 | 42.87 | 53.37 | 61.94 | 74.73 | 84.03 | 89.58 | 83.30 | 64.35 | 44.20 | 37.94 | 58.77 | |||||||||||||
| 1936 | 37.19 | 39.46 | a | 56.13 | 65.07 | 77.23 | 80.93 | 94.97 | a | 92.03 | 79.40 | 73.29 | 55.67 | c | 42.94 | 66.19 | ||||||||||
| 1937 | 26.42 | 39.54 | 50.74 | 57.40 | 73.84 | 77.63 | 92.45 | 90.90 | 83.77 | 69.94 | 54.47 | 45.00 | 63.51 | |||||||||||||
| 1938 | 41.16 | 42.68 | 45.26 | 61.47 | 66.45 | 79.60 | 88.29 | 87.03 | 85.10 | 64.90 | 45.30 | 43.55 | 62.57 | |||||||||||||
| 1939 | 41.47 | a | 36.54 | 52.39 | 66.87 | 75.16 | 76.90 | 92.13 | ----- | z | 79.27 | 64.10 | 57.90 | 49.97 | 62.97 | |||||||||||
| 1940 | 41.06 | 43.45 | 55.55 | 60.20 | 75.90 | 87.10 | 90.42 | 92.32 | 73.77 | 66.16 | 44.67 | 45.39 | 64.67 | |||||||||||||
| 1941 | 39.45 | 46.43 | 57.13 | 60.07 | 69.94 | 75.33 | 91.65 | 87.19 | 73.37 | 63.58 | 54.87 | 41.19 | 63.35 | |||||||||||||
| 1942 | 31.10 | 38.57 | 50.84 | 63.80 | 63.27 | a | 74.87 | 92.77 | 90.74 | 82.53 | 69.39 | 50.60 | 41.03 | 62.46 | ||||||||||||
| 1943 | 39.42 | 44.04 | 52.10 | 67.70 | 68.03 | 74.13 | 89.65 | 88.00 | 87.47 | 65.26 | 53.80 | 43.16 | 64.40 | |||||||||||||
| 1944 | 38.13 | 41.76 | 51.52 | 59.43 | 72.61 | 72.13 | 88.68 | 89.00 | 80.90 | 75.42 | 46.77 | 39.06 | 62.95 | |||||||||||||
| 1945 | 40.73 | a | 45.21 | 48.55 | 59.57 | 68.65 | 75.10 | 93.97 | 90.68 | 77.07 | 71.16 | 45.30 | 38.74 | 62.89 | ||||||||||||
| 1946 | 40.03 | 44.68 | 53.65 | 67.67 | 70.39 | 80.13 | 91.58 | 92.87 | 79.60 | 56.45 | 46.03 | 45.48 | 64.05 | |||||||||||||
| 1947 | 36.87 | 50.57 | 57.39 | 62.07 | 78.48 | 74.36 | b | 92.13 | 90.58 | 82.60 | 67.45 | 45.03 | 40.87 | 64.87 | ||||||||||||
| 1948 | 46.39 | 43.76 | 46.74 | 58.97 | 68.90 | 79.83 | 89.06 | 88.19 | 78.07 | a | 69.37 | a | 47.30 | 33.50 | a | 62.51 | ||||||||||
| 1949 | 24.68 | 37.89 | 50.45 | 69.50 | 74.48 | 80.53 | 91.81 | 90.23 | 83.17 | 61.10 | a | 61.53 | 39.97 | 63.78 | ||||||||||||
| 1950 | 32.97 | 46.81 | a | 49.10 | a | 61.67 | 69.65 | 78.97 | a | 91.48 | 90.48 | 77.55 | a | 70.35 | 53.63 | 46.06 | 64.06 | |||||||||
| 1951 | 37.23 | a | 45.57 | 48.48 | 68.10 | 72.39 | 78.90 | 89.52 | 88.10 | 82.90 | 62.16 | 49.93 | 35.45 | 63.23 | ||||||||||||
| 1952 | 33.52 | 39.66 | 45.31 | b | 66.83 | 72.03 | 77.43 | 89.19 | 90.16 | 83.83 | 78.19 | 49.83 | a | 39.06 | 63.75 | |||||||||||
| 1953 | 48.42 | 47.96 | 55.23 | 61.47 | 65.22 | d | 72.14 | a | 93.90 | 88.10 | 83.97 | 69.06 | 56.47 | 41.23 | 65.26 | |||||||||||
| 1954 | 42.03 | a | 49.89 | 50.48 | 64.80 | 77.26 | 75.20 | 92.87 | 86.55 | 80.73 | 67.77 | 58.53 | 38.87 | 65.42 | ||||||||||||
| 1955 | 33.48 | 36.86 | 45.42 | 54.37 | 68.33 | a | 80.57 | 86.45 | 93.42 | 79.70 | 68.90 | 47.13 | 40.84 | 61.29 | ||||||||||||
| 1956 | 39.65 | 38.24 | 52.68 | 63.13 | 70.90 | 78.93 | 91.42 | 86.68 | 83.48 | a | 63.94 | 50.70 | t | 41.31 | e | 64.58 | ||||||||||
| 1957 | 32.20 | a | 44.38 | b | 50.86 | b | 57.48 | a | 66.52 | 80.48 | a | 88.10 | 86.10 | 80.43 | b | 59.28 | f | 48.13 | 45.74 | 61.86 | ||||||
| 1958 | 39.58 | 49.07 | a | 48.38 | b | 56.93 | 77.24 | b | 75.63 | 86.90 | 89.73 | a | 78.32 | b | 72.87 | 54.10 | 49.74 | 64.88 | ||||||||
| 1959 | 44.48 | 42.36 | 52.84 | 65.50 | 64.16 | 81.90 | 92.16 | 88.05 | l | 71.13 | 66.19 | 55.77 | 43.23 | 61.79 | ||||||||||||
| 1960 | 34.16 | 39.90 | 52.52 | 62.13 | 66.61 | 82.13 | 92.00 | 83.35 | 81.57 | 65.74 | 48.87 | 43.26 | 62.69 | |||||||||||||
| 1961 | 45.16 | 48.36 | 51.68 | 59.70 | 68.84 | 86.00 | 89.68 | 90.13 | 71.23 | 63.77 | 49.80 | 39.23 | 63.63 | |||||||||||||
| 1962 | 34.29 | c | 41.43 | 47.29 | 66.20 | 64.40 | a | 81.48 | e | 85.48 | 83.87 | a | 80.72 | a | 66.23 | 53.00 | d | 46.03 | 62.53 | |||||||
| 1963 | 39.69 | e | 51.33 | d | 52.77 | a | 54.33 | 69.29 | 74.19 | d | 85.29 | 87.81 | 81.38 | i | 71.91 | i | 52.22 | c | 41.72 | b | 60.87 | |||||
| 1964 | 37.55 | 40.34 | 47.78 | h | 57.63 | 67.87 | 71.80 | 89.03 | 85.52 | d | 76.13 | 72.07 | c | 47.87 | 42.38 | e | 62.56 | |||||||||
| 1965 | 37.61 | c | 47.64 | 52.48 | 61.70 | c | 64.71 | c | 75.90 | 85.39 | c | 82.06 | 69.11 | c | 73.52 | 51.70 | c | 42.56 | d | 62.03 | ||||||
| 1966 | 39.03 | 40.11 | a | 52.20 | a | 64.70 | c | 77.81 | j | 75.17 | g | 88.87 | 88.16 | 85.09 | h | 65.35 | e | 51.83 | f | 40.89 | d | 59.91 | ||||
| 1967 | 41.24 | b | 49.22 | a | 52.30 | h | 50.00 | d | 70.70 | h | 75.62 | a | 91.58 | 93.16 | 81.80 | 66.71 | n | 53.67 | f | 31.29 | q | 68.95 | ||||
| 1968 | ----- | z | ----- | z | 55.52 | j | 57.93 | c | 69.12 | n | 79.37 | c | 93.50 | k | 79.11 | c | 76.89 | b | 65.63 | a | 47.57 | i | 39.29 | q | 71.79 | |
| 1969 | 39.71 | 40.23 | f | 49.71 | g | 65.33 | o | 73.82 | n | 75.65 | d | 89.10 | a | 90.89 | d | ----- | z | 57.96 | d | 55.58 | k | 44.95 | l | 70.66 | ||
| 1970 | 40.96 | g | 51.42 | d | 50.73 | p | 53.09 | g | 66.00 | l | 76.93 | c | 88.79 | b | 91.93 | q | 75.50 | n | 62.83 | m | 51.11 | l | 37.19 | j | 72.38 | |
| 1971 | 40.96 | h | 51.86 | n | ----- | z | 59.25 | n | 69.79 | q | 73.88 | f | 88.30 | h | 90.50 | g | 73.76 | i | 62.41 | n | 49.50 | l | 34.37 | l | 9999.00 | |
| 1972 | 36.35 | h | ----- | z | 58.00 | j | 59.00 | f | 75.13 | a | 82.21 | a | 89.69 | e | 89.37 | d | 74.36 | e | 63.52 | b | 46.07 | c | 32.63 | a | 69.12 | |
| 1973 | 35.85 | e | 47.35 | b | 50.04 | f | 59.78 | c | 74.56 | d | 80.14 | a | 89.20 | a | 88.25 | c | 76.66 | a | 66.68 | i | 44.74 | g | 43.00 | m | 68.97 | |
| 1974 | 34.50 | g | 43.47 | k | 49.17 | h | 57.80 | e | 67.00 | b | 85.28 | a | 87.00 | 86.33 | g | 81.50 | b | 68.52 | d | 53.85 | j | 37.67 | j | 74.52 | ||
| 1975 | 36.00 | o | 43.56 | j | 52.38 | r | 50.68 | h | 68.77 | i | 75.33 | i | 88.57 | a | 83.45 | i | 80.15 | c | 62.95 | l | 47.41 | h | 45.10 | j | 84.36 | |
| 1976 | 40.41 | n | 46.47 | n | 49.11 | l | 58.96 | d | 74.30 | h | 76.45 | a | 88.40 | a | 78.79 | c | 76.47 | k | 64.54 | r | 58.22 | l | 47.50 | g | 75.65 | |
| 1977 | 35.23 | e | 48.79 | i | 50.11 | m | 69.14 | i | 60.42 | g | 84.48 | a | 86.80 | f | 87.96 | g | 75.81 | c | 66.38 | b | 47.68 | h | 45.42 | g | 65.48 | |
| 1978 | 40.43 | c | 43.64 | f | 58.41 | i | 56.08 | d | 63.46 | e | 77.25 | b | 85.84 | 86.25 | g | 72.20 | 70.07 | c | 45.61 | l | 34.90 | b | 62.53 | |||
| 1979 | 27.76 | f | 42.20 | h | 53.25 | g | 59.59 | c | 69.23 | e | 79.64 | b | 88.93 | d | 84.21 | b | 82.40 | 66.32 | c | 44.30 | 43.14 | i | 71.83 | |||
| 1980 | 38.56 | f | 49.22 | k | 48.91 | i | 64.55 | h | 65.23 | e | 73.36 | e | 87.33 | a | 83.07 | b | 75.26 | c | 65.80 | a | 51.64 | b | 46.30 | d | 68.50 | |
| 1981 | 37.92 | g | 45.87 | e | 55.64 | q | ----- | z | ----- | z | 78.71 | m | 86.26 | 91.52 | d | 78.20 | j | 61.24 | f | 51.78 | c | 44.84 | f | 68.86 | ||
| 1982 | 35.68 | 41.67 | j | 49.65 | 56.30 | 67.06 | 76.33 | 84.39 | 88.29 | 72.20 | 60.55 | k | 42.57 | i | 36.81 | 62.97 | ||||||||||
| 1983 | 41.13 | 46.71 | 48.97 | 54.33 | 68.23 | 76.47 | 83.26 | 86.48 | 77.70 | 68.89 | l | 46.45 | j | 31.42 | l | 64.81 | ||||||||||
| 1984 | 28.50 | i | 39.90 | s | 43.00 | z | 58.73 | o | 68.00 | i | 72.03 | 88.52 | 87.95 | j | 77.07 | 57.31 | o | 46.59 | m | 35.39 | 68.25 | |||||
| 1985 | 33.81 | 39.65 | k | 48.35 | k | 66.97 | 70.87 | 82.73 | 92.32 | 85.45 | i | 68.74 | c | 62.65 | 39.93 | 33.36 | q | 64.75 | ||||||||
| 1986 | 45.07 | q | 50.38 | t | 60.05 | k | 60.63 | 69.76 | j | 85.30 | 84.81 | 91.73 | a | 69.50 | 66.23 | i | 54.58 | r | 40.03 | 72.00 | ||||||
| 1987 | 36.29 | 46.29 | 51.84 | 71.50 | 71.74 | 81.93 | 83.97 | 86.94 | 83.17 | 72.71 | 49.60 | 39.97 | 64.66 | |||||||||||||
| 1988 | 35.10 | 49.41 | 55.29 | 64.30 | 70.81 | 83.47 | 92.87 | 91.04 | h | 81.93 | o | 78.55 | t | 46.62 | n | ----- | z | 64.46 | ||||||||
| 1989 | ----- | z | ----- | z | ----- | z | 64.33 | 69.84 | 84.57 | 96.23 | 87.23 | 79.03 | 67.00 | 56.29 | b | 46.10 | 72.29 | |||||||||
| 1990 | 43.16 | 44.00 | 58.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.17 | 31.45 | 45.43 | ||||||
| 1991 | ----- | z | 51.54 | ----- | z | 55.67 | 61.68 | 73.47 | o | ----- | z | ----- | z | ----- | z | ----- | z | 46.50 | ----- | z | 53.84 | |||||
| 1992 | ----- | z | ----- | z | 59.93 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.42 | 40.42 | ||
| 1994 | 42.90 | 41.46 | 58.13 | 61.83 | 69.42 | 78.87 | 88.77 | 87.29 | 79.03 | 60.97 | 38.03 | 35.29 | 61.83 | |||||||||||||
| 1995 | 40.94 | 52.86 | 49.48 | 55.67 | 65.10 | 71.80 | 83.35 | 82.52 | 75.93 | 61.65 | 54.53 | 38.10 | 60.99 | |||||||||||||
| 1996 | 39.16 | 42.45 | 52.42 | 59.33 | 63.00 | 76.50 | 87.74 | 84.55 | 71.43 | 61.61 | 49.87 | 40.58 | 60.72 | |||||||||||||
| 1997 | 38.68 | 44.07 | 56.10 | 56.00 | 72.06 | 73.83 | 82.06 | 84.68 | 76.27 | 61.35 | 50.80 | 37.65 | 61.13 | |||||||||||||
| 1998 | 44.13 | 43.79 | 51.65 | 56.67 | 60.29 | 70.27 | ----- | z | 88.58 | 78.30 | 61.06 | 48.40 | 35.87 | 58.09 | ||||||||||||
| 1999 | 40.74 | 42.32 | 50.84 | 55.50 | 67.52 | 71.70 | 88.71 | 85.90 | 77.17 | 69.35 | 56.20 | 38.74 | 62.06 | |||||||||||||
| 2000 | 40.61 | 47.83 | 51.10 | 65.70 | 69.29 | 81.10 | ----- | z | 88.71 | 74.67 | 60.03 | 40.17 | 36.84 | 59.64 | ||||||||||||
| 2001 | 33.13 | 41.41 | a | 53.74 | 55.77 | 73.52 | 76.97 | 87.05 | j | 90.16 | 80.97 | 65.42 | 51.40 | 36.00 | 59.86 | |||||||||||
| 2002 | 36.65 | ----- | z | 49.16 | 60.87 | 69.55 | 78.37 | 89.84 | 83.41 | i | ----- | z | 61.29 | 50.87 | 42.65 | 59.91 | ||||||||||
| 2003 | 45.06 | 43.36 | 53.87 | 55.20 | ----- | z | ----- | z | ----- | z | 86.84 | ----- | z | ----- | z | 44.40 | 41.23 | 52.85 | ||||||||
| 2004 | 34.65 | 39.24 | 60.10 | 63.77 | 65.13 | ----- | z | ----- | z | ----- | z | ----- | z | 43.91 | t | 44.23 | 41.42 | 49.79 | ||||||||
| 2005 | 35.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.77 | ||
| 2006 | ----- | z | 43.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.43 | ||
| 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 | 50.61 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.13 | 39.39 | 44.71 | ||||
| 2011 | 36.74 | 41.23 | b | 45.84 | 51.03 | a | 58.90 | 69.60 | 85.13 | 88.23 | 81.77 | 63.26 | 46.03 | 41.74 | 59.13 | |||||||||||
| 2012 | 42.37 | a | 43.90 | 50.55 | 60.60 | 66.52 | 75.70 | 90.19 | 89.84 | 80.60 | 64.13 | 50.88 | f | 39.03 | 63.95 | |||||||||||
| 2013 | 29.59 | b | 43.00 | 53.13 | 70.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.91 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 37.85 | 43.80 | 51.61 | 60.69 | 69.01 | 77.99 | 89.28 | 88.12 | 78.41 | 66.20 | 49.84 | 40.32 | 62.99 | |||||||||||||
| S.D. | 5.14 | 4.45 | 3.98 | 4.72 | 4.96 | 4.10 | 3.16 | 3.21 | 4.27 | 4.44 | 4.98 | 4.29 | 1.93 | |||||||||||||
| SKEW | -0.79 | 0.08 | 0.35 | 0.12 | -0.10 | 0.18 | -0.20 | -0.79 | -0.41 | 0.40 | -0.01 | 0.07 | -0.69 | |||||||||||||
| MAX | 48.42 | 52.86 | 63.42 | 71.50 | 79.77 | 87.10 | 96.23 | 93.42 | 87.47 | 78.19 | 61.53 | 49.97 | 66.35 | |||||||||||||
| MIN | 20.06 | 35.04 | 42.87 | 50.00 | 55.48 | 69.60 | 82.06 | 78.79 | 68.74 | 56.45 | 38.03 | 30.65 | 57.92 | |||||||||||||
| NO YRS | 63 | 60 | 56 | 65 | 61 | 68 | 65 | 61 | 62 | 58 | 57 | 62 | 37 | |||||||||||||