| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 97.58 | s | 90.06 | 81.73 | 68.61 | 47.60 | 39.87 | 65.58 | ||||||
| 1943 | 36.06 | 43.18 | 51.84 | 69.72 | a | 70.77 | a | 78.20 | 92.77 | 89.23 | 85.83 | 65.97 | 49.17 | 40.81 | 64.46 | |||||||||||
| 1944 | 31.87 | 42.48 | 52.26 | 63.63 | 75.00 | 76.90 | 90.68 | 88.90 | 80.23 | 71.87 | 45.33 | 35.29 | 62.87 | |||||||||||||
| 1945 | 35.84 | 46.43 | 51.68 | 62.03 | 73.03 | 79.53 | 94.50 | a | 90.87 | 76.60 | 68.94 | 47.17 | 36.90 | 63.63 | ||||||||||||
| 1946 | 37.42 | 40.75 | 56.19 | 68.03 | 74.19 | 81.47 | 91.39 | 90.23 | 77.03 | a | 59.48 | 46.97 | 43.71 | 63.91 | ||||||||||||
| 1947 | 33.16 | 48.68 | 59.29 | 65.23 | 80.52 | 76.07 | 93.45 | 88.93 | a | 78.23 | 65.68 | 46.13 | 39.61 | 64.58 | ||||||||||||
| 1948 | 41.90 | 44.41 | 51.07 | a | 60.77 | 71.29 | 83.97 | 88.71 | 87.52 | 78.17 | 66.48 | 46.17 | 31.45 | 62.66 | ||||||||||||
| 1949 | 20.03 | 40.93 | 55.68 | 70.07 | 77.52 | 82.90 | 91.06 | 89.94 | 80.90 | 60.00 | 51.40 | 38.87 | 63.27 | |||||||||||||
| 1950 | 32.13 | 38.96 | 50.42 | 63.07 | 71.61 | 80.23 | 91.03 | 90.45 | 80.10 | 68.45 | 50.97 | 42.13 | 63.30 | |||||||||||||
| 1951 | 36.29 | 43.39 | 50.61 | 68.60 | 73.33 | a | 79.77 | 93.26 | 87.87 | a | 80.73 | 61.13 | 46.57 | 35.03 | 63.05 | |||||||||||
| 1952 | 32.45 | 36.55 | 47.77 | 69.60 | 74.84 | 80.67 | 91.68 | 90.71 | 83.77 | 73.32 | 47.60 | 37.97 | 63.91 | |||||||||||||
| 1953 | 46.65 | 47.50 | 56.74 | 62.43 | 67.84 | 75.47 | 93.77 | 89.97 | 84.60 | 68.52 | 52.90 | 38.74 | 65.43 | |||||||||||||
| 1954 | 44.00 | 48.96 | 54.42 | 65.67 | 77.81 | 77.67 | 92.48 | 86.65 | 79.57 | 65.74 | 52.83 | 37.16 | 65.25 | |||||||||||||
| 1955 | 30.03 | 36.21 | 48.71 | 58.27 | 71.58 | 85.33 | 88.37 | a | 93.00 | 80.07 | 66.03 | 41.90 | 41.68 | 61.76 | ||||||||||||
| 1956 | 38.06 | 37.86 | 57.87 | 70.07 | 76.55 | 80.73 | 91.77 | 87.06 | 80.37 | 61.32 | 44.67 | 37.00 | 63.61 | |||||||||||||
| 1957 | 26.45 | 40.07 | 54.48 | 62.97 | 72.35 | 82.03 | 89.35 | 88.19 | 82.73 | 61.84 | 48.27 | 40.00 | 62.40 | |||||||||||||
| 1958 | 35.81 | 48.07 | 53.06 | 61.20 | 80.19 | 81.87 | 91.68 | 91.77 | 77.40 | 69.48 | 49.10 | 42.71 | 65.20 | |||||||||||||
| 1959 | 41.68 | 47.36 | 55.45 | 67.83 | 69.71 | 85.93 | 95.16 | 88.06 | 73.43 | 63.32 | 48.07 | 38.32 | 64.53 | |||||||||||||
| 1960 | 30.97 | 41.00 | 54.19 | 65.70 | 70.77 | 88.60 | 97.77 | 86.65 | 83.23 | 65.00 | 48.80 | 37.16 | 64.15 | |||||||||||||
| 1961 | 37.29 | 48.64 | 56.13 | 64.23 | 75.68 | 92.13 | 95.19 | 94.45 | 73.97 | 62.90 | 46.73 | 37.03 | 65.37 | |||||||||||||
| 1962 | 28.52 | 37.36 | 52.94 | 70.27 | 70.42 | 84.20 | 90.03 | 87.48 | 81.43 | 62.97 | 49.97 | 39.81 | 62.95 | |||||||||||||
| 1963 | 33.52 | 51.39 | 57.32 | 59.43 | 76.23 | 79.60 | 89.42 | 90.90 | 82.70 | 68.45 | 48.27 | 31.97 | 64.10 | |||||||||||||
| 1964 | 31.97 | 35.17 | 48.77 | 61.73 | 71.55 | 77.70 | 91.55 | 85.35 | 75.60 | 67.00 | 46.23 | 39.74 | 61.03 | |||||||||||||
| 1965 | 35.58 | 46.82 | 54.23 | 65.93 | 71.13 | 80.93 | 90.65 | 85.13 | 72.20 | 68.81 | 51.67 | 37.13 | 63.35 | |||||||||||||
| 1966 | 42.26 | 45.00 | 57.42 | 66.10 | 79.00 | 80.97 | 91.55 | 89.94 | 82.57 | 63.81 | 50.60 | 36.97 | 65.51 | |||||||||||||
| 1967 | 41.00 | 48.36 | 54.16 | 57.00 | 74.13 | 82.20 | 95.52 | 96.61 | 84.80 | 63.32 | 49.47 | 34.90 | 65.12 | |||||||||||||
| 1968 | 36.13 | 49.34 | 59.58 | 61.97 | 73.23 | 83.50 | 95.16 | 83.03 | 77.53 | 63.00 | 46.13 | 39.23 | 63.99 | |||||||||||||
| 1969 | 35.35 | 38.68 | 54.00 | 66.60 | 77.94 | 81.93 | 91.68 | 91.77 | 80.47 | 59.35 | 49.20 | 40.10 | 63.92 | |||||||||||||
| 1970 | 39.87 | 50.54 | 53.00 | 57.27 | 74.10 | 84.87 | 92.68 | 94.06 | 74.00 | 60.71 | 48.27 | 36.13 | 63.79 | |||||||||||||
| 1971 | 37.71 | 46.68 | 50.87 | 64.77 | 76.00 | 79.70 | 93.42 | 96.16 | 75.10 | 63.00 | 46.30 | 33.94 | 63.64 | |||||||||||||
| 1972 | 34.32 | 41.41 | 56.68 | 61.77 | 77.29 | 83.60 | 90.55 | 91.87 | 73.57 | 65.16 | 46.90 | 27.39 | 62.54 | |||||||||||||
| 1973 | 34.00 | 45.68 | 55.19 | 63.23 | 77.48 | 84.87 | 94.23 | 90.35 | 78.63 | 64.06 | 46.00 | 41.19 | 64.58 | |||||||||||||
| 1974 | 33.74 | 46.39 | 54.61 | 64.23 | 72.13 | 89.70 | 91.39 | 90.97 | 84.40 | 65.26 | 48.97 | 35.42 | 64.77 | |||||||||||||
| 1975 | 30.35 | 40.79 | 51.52 | 56.37 | 71.81 | 79.43 | 94.48 | 85.52 | 82.87 | 63.00 | 45.63 | 34.32 | 61.34 | |||||||||||||
| 1976 | 33.29 | 38.28 | 49.65 | 62.10 | 78.16 | 81.07 | 91.97 | 83.58 | 79.83 | 65.42 | 51.20 | 37.29 | 62.65 | |||||||||||||
| 1977 | 24.42 | 41.54 | 53.48 | 72.20 | 68.48 | 89.97 | 90.81 | 90.35 | 77.53 | 65.61 | 46.87 | 42.71 | 63.66 | |||||||||||||
| 1978 | 40.16 | 44.11 | 59.61 | 59.57 | 69.10 | 81.30 | 89.00 | 87.32 | 74.83 | 68.81 | 45.23 | 32.19 | 62.60 | |||||||||||||
| 1979 | 22.00 | 37.64 | 55.61 | 61.27 | 73.61 | 83.30 | 90.81 | 87.00 | 84.03 | 67.97 | 44.73 | 39.13 | 62.26 | |||||||||||||
| 1980 | 36.61 | 44.79 | 52.71 | 67.37 | 71.26 | 76.97 | 88.97 | 86.16 | 76.93 | 65.55 | 48.43 | 37.10 | 62.74 | |||||||||||||
| 1981 | 37.13 | 44.64 | 56.87 | 63.73 | 70.26 | 77.77 | 89.55 | 95.29 | 81.07 | 61.19 | 52.13 | 40.84 | 64.21 | |||||||||||||
| 1982 | 31.52 | 36.29 | 53.19 | 59.40 | 70.58 | 80.53 | 85.45 | 90.39 | 75.97 | 63.19 | 43.70 | 36.42 | 60.55 | |||||||||||||
| 1983 | 35.97 | 46.43 | 54.81 | 59.93 | 72.65 | 79.37 | 84.77 | 89.81 | 77.73 | 65.65 | 49.67 | 30.71 | 62.29 | |||||||||||||
| 1984 | 29.48 | 34.76 | 51.13 | 60.23 | 68.48 | 76.63 | 90.94 | 91.94 | 75.83 | 60.77 | 47.37 | 30.42 | 59.83 | |||||||||||||
| 1985 | 27.84 | 35.43 | 47.71 | 68.23 | 73.94 | 82.73 | 95.71 | 86.13 | 69.50 | 60.48 | 36.30 | 19.90 | 58.66 | |||||||||||||
| 1986 | 30.42 | 45.43 | 59.90 | 63.50 | 73.48 | 88.37 | 86.48 | 94.45 | 71.27 | 67.29 | 50.87 | 35.61 | 63.92 | |||||||||||||
| 1987 | 31.90 | 45.68 | 55.29 | 72.80 | 77.77 | 84.37 | 86.94 | 88.32 | 84.17 | 71.58 | 49.63 | 40.58 | 65.75 | |||||||||||||
| 1988 | 29.81 | 43.24 | 56.97 | 66.43 | 72.84 | 85.20 | 93.39 | 90.58 | 78.60 | 76.13 | 47.57 | 33.42 | 64.51 | |||||||||||||
| 1989 | 27.42 | 27.36 | 49.94 | 66.97 | 71.84 | 85.63 | 93.61 | 86.03 | 80.80 | 64.74 | 49.70 | 40.97 | 62.08 | |||||||||||||
| 1990 | 41.87 | 45.25 | 58.65 | 70.93 | 70.52 | 82.10 | 93.16 | 89.68 | 88.33 | 63.77 | 51.03 | 28.77 | 65.34 | |||||||||||||
| 1991 | 30.74 | 47.68 | 54.58 | 62.27 | 68.97 | 77.33 | 92.06 | 92.39 | 82.93 | 68.29 | 44.17 | 38.16 | 63.30 | |||||||||||||
| 1992 | 38.06 | 49.86 | 63.65 | 68.83 | 82.68 | 85.37 | 86.68 | 92.03 | 78.90 | 68.42 | 42.90 | 33.48 | 65.91 | |||||||||||||
| 1993 | 29.74 | 32.50 | 46.42 | 60.67 | 77.65 | 75.63 | 80.00 | 84.45 | 81.10 | 67.32 | 44.03 | 41.58 | 60.09 | |||||||||||||
| 1994 | 37.42 | 42.75 | 62.03 | 67.47 | 75.26 | 82.73 | 94.58 | 94.10 | 84.67 | 64.65 | 40.23 | ----- | z | 67.81 | ||||||||||||
| 1995 | 38.71 | 51.07 | 54.32 | 62.30 | 71.81 | ----- | z | 88.77 | 87.13 | 83.20 | 62.94 | 50.07 | 39.29 | 62.69 | ||||||||||||
| 1996 | 39.23 | 42.66 | 56.35 | 64.07 | 68.97 | 82.27 | 93.97 | 90.58 | 76.70 | 65.68 | 51.40 | 40.23 | 64.34 | |||||||||||||
| 1997 | 39.77 | 46.18 | 58.94 | 62.57 | 78.10 | 81.83 | 88.32 | 91.48 | 82.07 | 65.81 | 51.93 | 38.16 | 65.43 | |||||||||||||
| 1998 | 40.84 | 47.93 | 55.23 | 62.37 | 68.39 | ----- | z | 95.16 | 93.06 | 83.93 | 66.35 | 51.97 | 36.81 | 63.82 | ||||||||||||
| 1999 | 41.45 | 42.21 | 55.52 | 62.30 | 70.97 | 79.67 | 90.10 | 90.68 | 80.20 | 68.68 | 54.53 | 36.52 | 64.40 | |||||||||||||
| 2000 | 37.52 | 48.97 | 55.23 | 68.83 | 74.29 | 83.13 | 91.97 | 92.71 | 77.37 | 64.16 | 41.83 | 35.94 | 64.33 | |||||||||||||
| 2001 | 33.26 | 40.00 | 57.71 | 61.47 | 77.29 | 81.23 | 89.61 | 93.29 | ----- | z | ----- | z | 52.40 | 36.19 | 62.25 | |||||||||||
| 2002 | 37.74 | ----- | z | 52.03 | 64.63 | 72.77 | 83.83 | 94.81 | 86.74 | 81.33 | 65.10 | ----- | z | 43.29 | 68.23 | |||||||||||
| 2003 | 40.74 | 48.11 | 58.42 | 61.97 | 72.77 | 85.07 | 96.61 | 92.16 | 81.73 | 72.35 | 47.13 | 43.48 | 66.71 | |||||||||||||
| 2004 | 31.23 | 39.14 | 62.19 | 68.03 | 71.35 | 83.43 | 92.87 | 88.97 | 77.77 | 66.32 | 46.20 | 40.61 | 64.01 | |||||||||||||
| 2005 | 35.94 | 46.75 | 58.77 | 63.70 | 71.52 | 78.40 | 92.58 | 92.23 | 78.63 | 65.39 | 44.60 | 31.42 | 63.33 | |||||||||||||
| 2006 | 40.65 | 44.36 | 51.87 | 63.90 | 75.74 | 85.30 | 97.32 | 90.00 | 79.80 | 65.52 | 51.47 | 37.74 | 65.31 | |||||||||||||
| 2007 | 38.52 | 47.96 | 61.00 | 64.97 | 77.45 | 84.23 | 97.81 | 89.97 | 79.60 | 63.06 | 50.53 | 38.71 | 66.15 | |||||||||||||
| 2008 | 32.71 | 41.76 | 52.29 | 60.20 | 74.48 | 81.80 | 93.00 | 91.06 | 79.17 | 65.55 | 50.67 | 37.81 | 63.37 | |||||||||||||
| 2009 | 34.23 | 41.57 | 52.13 | 64.67 | 75.48 | 79.77 | 92.19 | 88.87 | 85.33 | 58.61 | 49.80 | 33.42 | 63.01 | |||||||||||||
| 2010 | 39.48 | 44.39 | 56.61 | 61.17 | 66.77 | 78.10 | 90.74 | 88.06 | 79.87 | 68.35 | 47.07 | 35.13 | 62.98 | |||||||||||||
| 2011 | 32.06 | 41.93 | 51.35 | 58.07 | 67.68 | 76.47 | 89.13 | 93.26 | 86.39 | g | 64.97 | 47.29 | b | 40.83 | a | 60.28 | ||||||||||
| 2012 | 42.56 | d | 47.28 | 56.03 | a | 66.68 | b | 71.27 | a | 80.17 | 95.45 | 94.52 | 81.61 | g | 64.42 | 50.17 | 42.38 | o | 66.85 | |||||||
| 2013 | 25.17 | a | 44.42 | b | 56.07 | b | 73.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.89 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 34.93 | 43.36 | 54.68 | 64.17 | 73.45 | 81.82 | 91.74 | 89.92 | 79.64 | 65.46 | 47.95 | 37.17 | 63.61 | |||||||||||||
| S.D. | 5.29 | 4.85 | 3.61 | 3.80 | 3.45 | 3.56 | 3.16 | 2.99 | 3.76 | 3.40 | 3.26 | 4.16 | 1.57 | |||||||||||||
| SKEW | -0.41 | -0.72 | 0.09 | 0.19 | 0.34 | 0.47 | -0.76 | -0.06 | -0.34 | 0.48 | -0.76 | -1.28 | -0.74 | |||||||||||||
| MAX | 46.65 | 51.39 | 63.65 | 72.80 | 82.68 | 92.13 | 97.81 | 96.61 | 88.33 | 76.13 | 54.53 | 43.71 | 66.71 | |||||||||||||
| MIN | 20.03 | 27.36 | 46.42 | 56.37 | 66.77 | 75.47 | 80.00 | 83.03 | 69.50 | 58.61 | 36.30 | 19.90 | 58.66 | |||||||||||||
| NO YRS | 71 | 70 | 71 | 70 | 70 | 68 | 70 | 71 | 68 | 70 | 70 | 69 | 63 | |||||||||||||