| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 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 | 11.29 | x | ----- | z | ----- | z | 9999.00 | |
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.06 | 45.00 | 44.16 | 48.41 | ||||
| 1947 | 40.35 | 51.11 | 55.84 | 62.77 | 75.39 | 69.33 | 82.71 | 81.06 | 77.47 | 62.06 | 45.33 | 43.10 | 62.21 | |||||||||||||
| 1948 | 45.45 | 42.34 | 43.94 | 51.13 | 62.32 | 74.20 | 80.68 | 79.50 | a | 71.43 | 64.16 | 46.80 | 34.29 | 58.02 | ||||||||||||
| 1949 | 28.90 | a | 38.93 | 47.03 | 66.61 | b | 68.81 | 76.80 | 84.19 | 82.35 | 77.77 | 61.19 | 59.33 | 39.65 | 60.96 | |||||||||||
| 1950 | 30.48 | 44.96 | a | 47.00 | 57.17 | 67.68 | 71.30 | 85.29 | 85.35 | 75.43 | 60.35 | 51.30 | 46.74 | 60.26 | ||||||||||||
| 1951 | 35.68 | 42.54 | 46.32 | 65.50 | 66.58 | 79.20 | 85.87 | 82.90 | 79.07 | 58.94 | 47.53 | 33.16 | 60.27 | |||||||||||||
| 1952 | 32.94 | 42.21 | 42.61 | 62.97 | 67.03 | 69.83 | 85.13 | a | 83.29 | 80.77 | 73.90 | 48.87 | 37.23 | 60.56 | ||||||||||||
| 1953 | 44.35 | 46.43 | 49.74 | 55.63 | 57.87 | 66.20 | 85.77 | 78.63 | a | 80.72 | a | 63.77 | 50.67 | 43.16 | 60.25 | |||||||||||
| 1954 | 38.13 | 46.33 | a | 46.97 | 60.23 | 70.84 | 68.17 | 85.16 | 76.42 | 72.63 | 63.57 | a | 55.77 | 40.45 | 60.39 | |||||||||||
| 1955 | 37.35 | 40.54 | 47.16 | 48.53 | 63.87 | 77.24 | a | 80.10 | 87.81 | 75.73 | 65.10 | a | 44.30 | 38.07 | a | 58.82 | ||||||||||
| 1956 | 38.97 | b | 37.38 | 48.35 | 60.63 | 66.06 | 71.43 | 84.52 | 79.85 | d | 76.33 | 59.13 | 54.33 | c | 46.58 | 60.30 | ||||||||||
| 1957 | 32.35 | 43.79 | 47.39 | 58.24 | a | 65.90 | 76.93 | 80.90 | 79.52 | 78.40 | 55.65 | 48.14 | a | 44.73 | a | 59.33 | ||||||||||
| 1958 | 39.20 | a | 48.36 | 45.94 | 54.97 | 73.16 | 71.03 | 84.13 | 86.81 | 73.47 | 69.52 | 51.23 | 49.35 | 62.26 | ||||||||||||
| 1959 | 43.74 | 44.07 | 53.26 | 63.57 | 62.29 | 76.93 | a | 89.19 | 81.55 | 68.80 | 65.13 | a | 57.33 | 42.68 | 62.38 | |||||||||||
| 1960 | 34.80 | a | 41.54 | a | 53.03 | 57.07 | 61.87 | 80.20 | 90.32 | 81.77 | 80.60 | 64.81 | 44.43 | 41.52 | 61.00 | |||||||||||
| 1961 | 46.87 | 46.43 | 48.39 | 59.47 | 62.97 | 81.53 | 88.52 | 87.87 | 70.15 | d | 63.06 | 47.63 | 39.97 | 61.91 | ||||||||||||
| 1962 | 39.19 | 41.57 | 46.87 | 64.50 | 60.52 | 76.57 | 84.13 | 80.42 | 78.50 | 63.87 | a | 51.23 | 46.23 | 61.13 | ||||||||||||
| 1963 | 43.65 | 51.64 | 49.35 | 49.43 | 66.45 | 70.47 | 78.16 | 80.68 | 79.10 | 63.94 | 48.33 | 44.90 | 60.51 | |||||||||||||
| 1964 | 39.29 | 47.45 | 46.94 | 56.60 | 64.90 | 71.07 | 82.71 | 80.90 | 75.43 | 69.58 | 44.97 | 37.19 | 59.75 | |||||||||||||
| 1965 | 39.23 | 49.43 | 54.94 | 58.13 | 65.00 | 72.93 | 82.45 | 77.68 | 70.73 | 70.94 | 48.43 | 39.68 | 60.80 | |||||||||||||
| 1966 | 41.10 | 43.93 | 51.65 | 62.80 | 73.50 | a | 71.97 | 80.35 | 84.29 | 77.50 | b | 67.10 | a | 47.73 | 42.54 | e | 62.04 | |||||||||
| 1967 | 42.43 | a | ----- | z | ----- | z | 48.39 | l | 68.67 | d | 75.65 | d | 88.11 | c | 90.93 | d | 81.38 | d | 64.43 | h | 54.93 | a | ----- | z | 71.73 | |
| 1968 | ----- | z | 48.73 | g | ----- | z | ----- | z | 68.06 | m | 79.68 | k | 91.10 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.00 | 36.58 | 39.29 | |||
| 1983 | 42.97 | 43.25 | 46.35 | 52.17 | 66.45 | 70.17 | 76.68 | 80.65 | 73.07 | 64.81 | 43.97 | 33.42 | 57.83 | |||||||||||||
| 1984 | 37.71 | 45.00 | 52.06 | 52.90 | 64.65 | 69.90 | 86.19 | d | 83.81 | 71.67 | 54.06 | 41.80 | 34.16 | 57.83 | ||||||||||||
| 1985 | 32.74 | 42.64 | 48.00 | 64.30 | 65.74 | 77.10 | 88.55 | 79.84 | 64.67 | 59.90 | 38.87 | 36.23 | 58.21 | |||||||||||||
| 1986 | 44.90 | 46.68 | 56.55 | 58.20 | 66.29 | 78.50 | 78.23 | 87.06 | 64.70 | 65.55 | 50.03 | 40.94 | 61.47 | |||||||||||||
| 1987 | 38.32 | 45.54 | 50.97 | 66.80 | 69.32 | 78.48 | a | 77.07 | a | 83.03 | 80.93 | 73.13 | 47.07 | a | 37.55 | 62.35 | ||||||||||
| 1988 | 37.26 | 53.93 | 53.87 | 59.87 | 64.52 | 74.67 | 86.03 | 85.84 | 77.10 | 75.23 | 43.83 | 39.68 | 62.65 | |||||||||||||
| 1989 | 38.68 | 36.82 | 48.68 | 62.53 | 63.97 | 75.87 | 83.74 | 79.00 | 74.23 | 62.55 | 52.57 | 48.03 | 60.56 | |||||||||||||
| 1990 | 42.48 | 44.29 | 53.48 | 64.90 | 62.97 | 73.27 | 86.19 | 81.23 | 82.23 | 63.74 | 50.77 | 35.73 | a | 61.77 | ||||||||||||
| 1991 | ----- | z | 56.48 | g | 48.10 | 54.13 | 60.58 | 69.17 | 84.55 | 84.06 | 81.17 | 67.48 | 48.70 | 42.61 | 64.06 | |||||||||||
| 1992 | 41.10 | ----- | z | ----- | z | 63.03 | 78.77 | 78.43 | 80.68 | 86.00 | 74.90 | 65.94 | 46.67 | ----- | z | 68.39 | ||||||||||
| 1993 | 31.74 | 34.50 | 50.55 | 56.17 | 69.39 | 70.27 | 72.81 | 77.84 | 78.87 | 66.10 | 47.50 | 42.39 | 58.18 | |||||||||||||
| 1994 | 49.10 | 42.14 | 57.94 | 61.40 | 68.16 | 75.97 | 88.58 | 85.87 | 78.35 | d | 62.17 | a | 41.30 | 41.16 | 62.68 | |||||||||||
| 1995 | 42.35 | k | 54.57 | n | 49.70 | a | 56.93 | 65.16 | ----- | z | 82.58 | 86.23 | 78.00 | ----- | z | ----- | z | 38.65 | 65.32 | |||||||
| 1996 | 42.39 | 48.68 | j | 54.68 | 59.93 | 62.58 | ----- | z | 86.39 | 84.74 | 74.23 | 64.35 | 52.37 | 41.39 | 62.30 | |||||||||||
| 1997 | 44.82 | n | 44.43 | 55.45 | 58.38 | a | 73.94 | 73.29 | i | 82.16 | 84.87 | ----- | z | 62.06 | 52.28 | l | 41.57 | a | 62.86 | |||||||
| 1998 | 44.13 | 43.05 | i | 53.68 | i | 56.81 | n | 57.30 | k | 73.07 | 87.75 | k | 89.00 | a | 77.62 | n | 62.27 | i | 46.17 | 38.26 | l | 63.09 | ||||
| 1999 | 42.21 | q | 42.38 | l | 49.00 | n | 55.50 | f | 66.70 | k | ----- | z | 86.17 | g | 82.14 | j | 76.44 | e | 66.85 | r | 54.95 | k | 41.41 | i | 76.44 | |
| 2000 | 40.10 | 45.28 | 51.65 | 65.20 | ----- | z | ----- | z | 84.78 | h | 86.10 | 76.22 | c | 62.24 | b | 41.52 | g | 40.79 | g | 60.97 | ||||||
| 2001 | 39.82 | c | 41.27 | b | 55.15 | d | 56.85 | d | 74.90 | 76.21 | b | 83.63 | d | 87.18 | c | 78.71 | f | 66.25 | g | 48.50 | 37.54 | g | 62.61 | |||
| 2002 | 39.74 | ----- | z | 50.39 | 61.37 | 67.59 | i | 79.56 | e | 91.13 | 82.74 | 76.77 | 61.52 | 51.23 | 43.16 | 63.76 | ||||||||||
| 2003 | 45.26 | 44.64 | 53.61 | h | 53.86 | h | 66.85 | e | ----- | z | 92.88 | g | 85.36 | f | 81.38 | f | 70.40 | k | ----- | z | 38.24 | f | 52.25 | |||
| 2004 | 38.58 | e | 42.26 | j | 62.00 | f | 63.08 | d | 67.95 | k | 77.63 | 88.20 | f | 84.52 | f | 75.12 | f | 63.68 | i | 48.55 | j | 43.82 | n | 59.76 | ||
| 2005 | 39.44 | f | 47.35 | e | 56.35 | e | 57.28 | e | 64.76 | f | 70.88 | e | 89.92 | e | 85.96 | g | 76.57 | i | 64.61 | h | 43.71 | i | 28.09 | i | 64.36 | |
| 2006 | 42.26 | h | 43.47 | k | 45.92 | f | 58.95 | i | ----- | z | 81.67 | i | 90.81 | j | 83.61 | h | 79.50 | j | 65.58 | l | ----- | z | 41.00 | s | 9999.00 | |
| 2007 | 37.17 | g | 42.87 | e | 57.95 | k | 62.45 | h | 70.79 | g | 79.36 | h | 89.92 | e | 85.39 | h | 72.53 | k | 59.25 | g | 48.38 | i | 38.90 | k | 66.40 | |
| 2008 | 35.92 | g | 45.37 | j | 47.71 | q | 54.88 | f | 68.00 | m | 77.57 | g | 86.52 | j | 83.68 | 78.40 | 65.81 | 52.13 | 38.32 | 63.67 | ||||||
| 2009 | 42.97 | 45.00 | 49.29 | 59.93 | 70.77 | 74.23 | 88.35 | 85.68 | 83.90 | 58.42 | 49.70 | 36.55 | 62.07 | |||||||||||||
| 2010 | 43.23 | 46.21 | 52.90 | 54.53 | 61.58 | 74.10 | 86.84 | 85.00 | a | 77.28 | a | 65.81 | 45.23 | 38.94 | 60.97 | |||||||||||
| 2011 | 41.21 | b | 43.78 | e | 46.86 | c | 56.00 | g | 62.64 | f | 74.00 | e | 85.16 | l | 84.97 | 80.55 | a | 61.87 | 43.93 | c | 41.06 | 57.58 | ||||
| 2012 | 41.94 | 42.76 | 47.48 | 57.70 | 66.77 | 70.90 | 85.58 | 87.39 | 80.80 | 62.19 | 46.63 | 36.23 | 60.53 | |||||||||||||
| 2013 | 33.42 | 44.29 | 51.83 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.85 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 39.64 | 44.23 | 50.22 | 59.15 | 66.71 | 74.08 | 84.28 | 83.36 | 76.42 | 63.97 | 48.29 | 40.47 | 60.61 | |||||||||||||
| S.D. | 4.54 | 3.79 | 3.74 | 4.57 | 4.50 | 3.72 | 4.05 | 3.35 | 4.35 | 4.53 | 4.33 | 4.01 | 1.46 | |||||||||||||
| SKEW | -0.43 | 0.01 | 0.25 | -0.36 | 0.64 | 0.00 | -0.60 | -0.04 | -0.90 | 0.35 | 0.33 | 0.14 | -0.51 | |||||||||||||
| MAX | 49.10 | 53.93 | 57.94 | 66.80 | 78.77 | 81.53 | 91.13 | 90.93 | 83.90 | 75.23 | 59.33 | 49.35 | 62.68 | |||||||||||||
| MIN | 28.90 | 34.50 | 42.61 | 48.53 | 57.87 | 66.20 | 72.81 | 76.42 | 64.67 | 54.06 | 38.87 | 33.16 | 57.83 | |||||||||||||
| NO YRS | 44 | 41 | 42 | 43 | 41 | 42 | 43 | 45 | 43 | 42 | 44 | 42 | 33 | |||||||||||||