| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1937 | 27.00 | 50.07 | 65.81 | 46.21 | a | 71.94 | 77.97 | a | 92.35 | 88.23 | 83.87 | 70.52 | 56.80 | 47.39 | 64.84 | |||||||||||
| 1938 | 44.03 | 47.00 | 54.81 | 65.93 | 74.22 | d | 86.41 | a | 96.10 | 88.03 | 84.30 | 64.35 | 44.60 | 43.40 | a | 66.10 | ||||||||||
| 1939 | 46.14 | c | 47.29 | 58.10 | 70.73 | 79.23 | 78.21 | a | 94.03 | a | 94.13 | 82.23 | 73.00 | a | 63.27 | 58.30 | a | 70.39 | ||||||||
| 1940 | 45.87 | 54.34 | 65.65 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.29 | ||||
| 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 | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.27 | s | 77.04 | d | 54.20 | 49.81 | 60.35 | |||
| 1959 | 48.19 | 48.43 | 57.65 | 68.40 | 71.13 | 84.30 | 98.03 | 90.45 | 77.55 | a | 68.45 | 54.90 | 45.71 | 67.77 | ||||||||||||
| 1960 | 39.39 | 49.07 | 59.16 | 64.97 | a | 70.61 | 87.70 | 100.29 | 89.13 | 87.03 | 70.87 | 54.20 | 44.23 | 68.05 | ||||||||||||
| 1961 | 48.58 | 54.89 | 58.19 | 65.20 | 72.35 | 91.83 | 97.35 | 99.74 | 80.00 | 68.06 | 51.53 | 43.84 | 69.30 | |||||||||||||
| 1962 | 40.90 | 48.39 | 54.55 | 71.93 | 68.48 | 82.97 | 92.94 | 88.45 | 85.87 | 68.58 | 55.57 | 47.03 | 67.14 | |||||||||||||
| 1963 | 39.26 | 56.54 | 59.35 | 59.87 | 75.65 | 81.97 | 88.87 | 92.10 | 89.37 | 72.19 | 55.87 | 44.03 | 67.92 | |||||||||||||
| 1964 | 46.90 | 53.17 | 54.45 | 64.40 | 74.06 | 80.60 | 93.48 | 89.29 | 82.03 | 72.29 | 50.80 | 43.45 | 67.08 | |||||||||||||
| 1965 | 44.81 | 53.79 | 59.26 | 67.67 | 73.48 | 83.20 | 92.84 | 89.52 | 77.97 | 76.00 | 55.97 | 45.35 | 68.32 | |||||||||||||
| 1966 | 46.94 | 49.86 | 62.00 | 70.93 | 81.26 | 81.63 | 91.45 | 92.90 | 85.17 | 70.45 | 56.07 | 46.68 | 69.61 | |||||||||||||
| 1967 | 49.29 | 54.32 | 55.77 | 57.33 | 75.71 | 85.90 | 97.58 | 100.29 | 91.60 | 71.55 | 53.63 | 44.71 | 69.81 | |||||||||||||
| 1968 | 47.19 | 55.76 | 64.00 | 65.13 | 76.06 | 85.43 | 97.84 | 86.19 | 83.73 | 69.06 | 52.60 | 45.26 | 69.02 | |||||||||||||
| 1969 | 39.71 | 47.46 | 58.74 | 66.20 | 79.84 | 84.57 | 91.77 | 93.16 | 83.57 | 63.10 | 55.50 | 46.68 | 67.52 | |||||||||||||
| 1970 | 45.58 | 54.11 | 56.55 | 59.50 | 77.42 | 88.40 | 95.77 | 97.16 | 78.17 | 67.29 | 54.70 | 45.32 | 68.33 | |||||||||||||
| 1971 | 46.94 | 51.86 | 54.32 | 64.90 | 75.74 | 80.33 | 95.19 | 99.81 | 79.67 | 67.19 | 53.13 | 43.00 | 67.67 | |||||||||||||
| 1972 | 43.55 | 51.41 | 61.42 | 63.17 | a | 79.32 | 86.00 | 94.42 | 94.65 | 79.30 | 67.45 | 51.47 | 38.16 | 67.53 | ||||||||||||
| 1973 | 42.97 | 53.50 | 58.94 | 67.43 | 80.97 | 86.20 | 96.52 | 91.77 | 82.80 | 69.52 | 50.13 | 51.32 | 69.34 | |||||||||||||
| 1974 | 42.16 | 52.29 | 59.10 | 64.57 | 71.84 | 91.53 | 93.42 | 93.68 | 89.37 | 73.65 | 55.43 | 47.74 | 69.56 | |||||||||||||
| 1975 | 47.68 | 50.29 | 54.03 | 59.07 | 76.00 | 81.20 | 94.42 | 87.00 | 87.77 | 66.48 | 53.60 | 46.26 | 66.98 | |||||||||||||
| 1976 | 47.35 | 51.17 | 56.13 | 64.50 | 78.19 | 80.60 | 94.10 | 84.26 | 85.73 | 71.74 | 55.83 | 46.39 | 68.00 | |||||||||||||
| 1977 | 38.84 | 56.89 | 56.00 | 73.63 | 67.26 | 92.20 | 94.87 | a | 95.03 | 76.93 | a | 68.03 | 48.63 | 46.42 | 67.89 | |||||||||||
| 1978 | 45.26 | ----- | z | 62.30 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.78 | ||
| 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 | ----- | z | ----- | z | 9999.00 | |
| 1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 43.94 | 51.82 | 58.59 | 64.62 | 75.04 | 84.51 | 94.71 | 92.04 | 83.36 | 69.86 | 53.84 | 46.11 | 68.10 | |||||||||||||
| S.D. | 4.81 | 3.04 | 3.48 | 5.87 | 3.91 | 4.14 | 2.61 | 4.51 | 4.17 | 3.38 | 3.53 | 3.69 | 1.30 | |||||||||||||
| SKEW | -1.89 | -0.04 | 0.60 | -1.29 | -0.18 | 0.34 | 0.02 | 0.34 | 0.16 | 0.17 | -0.13 | 1.30 | -0.52 | |||||||||||||
| MAX | 49.29 | 56.89 | 65.81 | 73.63 | 81.26 | 92.20 | 100.29 | 100.29 | 91.60 | 77.04 | 63.27 | 58.30 | 70.39 | |||||||||||||
| MIN | 27.00 | 47.00 | 54.03 | 46.21 | 67.26 | 77.97 | 88.87 | 84.26 | 76.93 | 63.10 | 44.60 | 38.16 | 64.84 | |||||||||||||
| NO YRS | 24 | 23 | 24 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | |||||||||||||