| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1936 | 43.30 | u | 51.69 | c | 60.44 | d | 68.75 | f | 74.58 | 80.07 | b | 91.60 | a | 91.89 | c | 83.62 | a | 77.80 | a | 62.40 | 45.47 | a | 71.96 | |||
| 1937 | 29.90 | a | 42.16 | c | 53.31 | e | 60.59 | c | 76.48 | d | 79.07 | b | 91.33 | a | 90.16 | 84.43 | 72.47 | a | 51.20 | 40.83 | b | 64.33 | ||||
| 1938 | 42.83 | b | 40.54 | 48.29 | c | 59.57 | b | 72.42 | 86.41 | c | 94.33 | a | 88.94 | 82.97 | 66.77 | i | 53.15 | j | 46.31 | e | 66.26 | |||||
| 1939 | 45.70 | d | 48.48 | a | 61.40 | a | 71.50 | 76.29 | 82.83 | 94.29 | 96.87 | a | 85.17 | 72.48 | 62.43 | 49.39 | 70.57 | |||||||||
| 1940 | 49.68 | 49.62 | 60.53 | a | 67.54 | b | 78.16 | 90.80 | 89.03 | 95.42 | 75.73 | 68.87 | 47.69 | a | 41.58 | 67.89 | ||||||||||
| 1941 | 43.68 | 51.46 | 60.81 | 60.68 | b | 67.27 | a | 72.03 | 91.26 | 84.97 | 77.40 | 65.80 | f | 57.53 | 43.23 | 64.57 | ||||||||||
| 1942 | 44.35 | 50.57 | 58.32 | 61.97 | 66.35 | 79.50 | d | 91.87 | 93.19 | 84.90 | 73.71 | 55.38 | a | 44.03 | 67.01 | |||||||||||
| 1943 | 42.33 | d | 54.96 | 60.67 | a | 65.30 | 71.61 | 75.07 | b | 91.13 | 85.84 | 90.77 | 66.87 | 53.47 | 46.06 | 67.01 | ||||||||||
| 1944 | 42.77 | 50.36 | a | 58.68 | 60.30 | 72.97 | 77.33 | 89.74 | 88.52 | 84.67 | 75.52 | 50.03 | 40.80 | a | 65.97 | |||||||||||
| 1945 | 46.00 | 51.29 | 52.68 | 64.63 | 70.00 | 80.47 | 94.23 | 91.32 | 84.23 | 72.06 | 50.10 | 44.97 | 66.83 | |||||||||||||
| 1946 | 44.03 | 48.21 | 56.90 | a | 67.93 | 75.52 | 78.10 | 89.65 | 93.37 | a | 81.43 | 62.81 | 52.63 | 46.58 | 66.43 | |||||||||||
| 1947 | 42.77 | 57.78 | a | 62.55 | 68.00 | 80.19 | 78.67 | 86.29 | 87.61 | 86.57 | 67.52 | 53.33 | 44.26 | 67.96 | ||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.10 | 87.00 | 80.23 | 69.40 | a | 52.97 | 38.77 | a | 69.41 | |||||
| 1949 | 35.65 | 45.82 | 53.77 | 72.53 | 72.19 | j | 85.33 | 93.29 | 88.52 | 85.63 | 68.42 | 61.07 | 44.65 | 66.79 | ||||||||||||
| 1950 | 37.00 | 49.86 | 55.29 | 65.70 | 75.94 | 81.40 | 94.13 | 93.10 | 82.77 | 67.16 | 54.67 | 46.74 | 66.98 | |||||||||||||
| 1951 | 41.90 | 50.14 | 57.17 | a | 72.41 | a | 73.55 | 87.80 | 93.00 | 91.06 | 88.50 | 66.32 | 52.90 | 40.06 | 67.90 | |||||||||||
| 1952 | 36.65 | 48.10 | 52.29 | 68.77 | 75.00 | 76.70 | 94.39 | 90.35 | 87.07 | 76.87 | 50.50 | 37.74 | 66.20 | |||||||||||||
| 1953 | 45.35 | 54.61 | 56.94 | 62.67 | 62.90 | 73.37 | 92.84 | 85.90 | 88.87 | 67.71 | 55.17 | 45.10 | 65.95 | |||||||||||||
| 1954 | 45.03 | 55.96 | 56.16 | 66.57 | b | 78.35 | 77.27 | 91.97 | 82.45 | 78.27 | 68.19 | 57.47 | 42.39 | 66.67 | ||||||||||||
| 1955 | 38.29 | 49.43 | 58.26 | 57.40 | 74.16 | 84.97 | 87.58 | 94.39 | 81.07 | 71.68 | 49.18 | b | 44.55 | 65.91 | ||||||||||||
| 1956 | 45.16 | 43.07 | 58.68 | 68.70 | 73.19 | 79.23 | 92.40 | a | 87.68 | 83.03 | 64.84 | 53.75 | f | 43.93 | b | 67.26 | ||||||||||
| 1957 | 38.83 | a | 51.75 | 54.58 | 64.07 | 72.61 | 85.47 | 88.29 | 86.19 | 85.20 | 60.79 | b | 52.07 | 43.97 | 65.32 | |||||||||||
| 1958 | 43.16 | 53.07 | 52.48 | 62.57 | 80.19 | 79.53 | 92.53 | a | 94.48 | 83.10 | 76.87 | 52.17 | 47.42 | 68.13 | ||||||||||||
| 1959 | 47.42 | 48.79 | 61.94 | 72.23 | 71.61 | 87.17 | 96.16 | 91.16 | 77.07 | 74.23 | 62.30 | 45.87 | 69.66 | |||||||||||||
| 1960 | 43.06 | 51.38 | 61.19 | 63.57 | 70.00 | 87.77 | 95.16 | 89.16 | 86.50 | 71.35 | 53.20 | 42.55 | 67.91 | |||||||||||||
| 1961 | 48.65 | 51.89 | 52.71 | 66.07 | 67.00 | 87.67 | 92.45 | 91.65 | 78.73 | 70.68 | 52.59 | a | 43.77 | 66.99 | ||||||||||||
| 1962 | 42.52 | 47.89 | a | 54.35 | 72.60 | 68.10 | 85.03 | 91.39 | 87.42 | 87.00 | 67.43 | c | 55.75 | b | 48.11 | d | 67.30 | |||||||||
| 1963 | 46.68 | 57.86 | 57.42 | 55.73 | 74.00 | 80.93 | 86.97 | 88.29 | 86.48 | a | 68.55 | 51.14 | i | 47.67 | a | 68.23 | ||||||||||
| 1964 | 44.19 | 53.24 | 56.58 | 67.20 | 71.45 | 78.67 | 91.00 | 91.61 | 83.97 | 77.55 | 50.93 | 45.00 | 67.62 | |||||||||||||
| 1965 | 40.48 | 55.96 | 62.10 | 62.53 | 71.70 | a | 81.90 | 91.19 | 85.42 | 81.13 | 78.39 | 56.63 | c | 43.33 | a | 67.56 | ||||||||||
| 1966 | 43.81 | 50.48 | a | 58.42 | 70.93 | 80.61 | 81.10 | 89.55 | 93.87 | 84.30 | 73.65 | 53.44 | c | 43.74 | 68.66 | |||||||||||
| 1967 | 45.00 | 56.25 | 53.42 | 53.00 | c | 76.47 | a | 83.27 | 94.55 | 97.35 | 90.13 | 70.76 | b | 57.00 | a | 32.77 | 67.50 | |||||||||
| 1968 | 39.35 | 54.69 | 60.65 | 67.27 | 74.48 | 85.37 | 95.26 | 85.03 | 86.80 | 70.17 | b | 49.96 | f | 40.43 | c | 69.05 | ||||||||||
| 1969 | 38.13 | a | 44.44 | a | 59.00 | b | 64.17 | 79.74 | d | 81.97 | 92.10 | 93.87 | 87.90 | 66.83 | b | 57.77 | 46.65 | 67.71 | ||||||||
| 1970 | 46.58 | 56.04 | 59.92 | f | 60.47 | 78.61 | 87.17 | 95.48 | 95.19 | 85.10 | 71.55 | 54.47 | 39.44 | d | 70.01 | |||||||||||
| 1971 | 44.37 | l | 53.96 | 53.97 | 62.37 | 72.87 | 79.37 | 92.03 | 94.48 | 81.20 | 68.32 | 54.97 | 42.48 | j | 71.35 | |||||||||||
| 1972 | 46.48 | h | 50.80 | i | 63.35 | 62.60 | 76.00 | 86.43 | 94.10 | 92.10 | 79.57 | 71.42 | e | 51.52 | i | 39.26 | l | 78.20 | ||||||||
| 1973 | 42.95 | j | 53.05 | i | 55.00 | i | 68.29 | i | 80.28 | f | 82.90 | 92.48 | 90.87 | 81.07 | 67.70 | d | 51.14 | h | 45.67 | m | 83.01 | |||||
| 1974 | 43.83 | h | 49.11 | i | 53.91 | h | 59.41 | h | 70.96 | c | 83.07 | 86.00 | 89.29 | 89.63 | 72.48 | 55.55 | j | 46.50 | o | 81.91 | ||||||
| 1975 | 41.87 | h | 47.26 | i | 49.85 | k | 54.82 | h | 73.12 | g | 81.03 | 87.37 | a | 85.29 | 88.10 | 66.38 | g | 50.84 | k | 44.81 | j | 85.45 | ||||
| 1976 | 46.45 | k | 51.68 | j | 55.61 | h | 60.05 | h | 75.43 | j | 78.90 | a | 88.45 | 79.90 | 82.90 | 75.15 | e | 60.38 | i | 50.19 | j | 81.06 | ||||
| 1977 | 34.30 | k | 54.68 | i | 52.70 | h | 71.17 | g | 61.71 | c | 85.40 | 90.29 | 91.94 | 79.44 | e | 70.65 | k | 54.05 | i | 48.29 | j | 81.76 | ||||
| 1978 | 50.33 | j | 52.32 | i | 61.95 | i | 60.47 | k | 69.87 | h | 81.90 | 89.35 | 86.16 | 72.50 | f | 77.10 | j | 53.76 | i | 41.15 | k | 85.81 | ||||
| 1979 | 44.36 | i | 48.79 | i | 60.09 | i | 59.67 | i | 74.20 | f | 83.53 | 89.47 | a | 84.65 | 86.00 | d | 72.14 | i | 51.62 | i | 49.11 | l | 85.91 | |||
| 1980 | 46.05 | i | 54.05 | i | 55.33 | j | 64.32 | h | 70.77 | i | 74.64 | b | 90.32 | 89.42 | 83.19 | c | 74.65 | k | 56.59 | m | 48.14 | j | 84.39 | |||
| 1981 | 46.81 | j | 52.50 | j | 57.82 | i | 67.27 | h | 71.76 | b | 85.50 | 93.45 | 94.42 | 85.33 | 65.36 | i | 55.50 | l | 47.25 | k | 86.09 | |||||
| 1982 | ----- | z | 48.79 | i | 53.68 | i | 59.73 | 76.90 | k | 79.13 | 87.10 | 89.32 | 77.13 | 66.00 | k | 51.78 | l | 42.10 | k | 78.48 | ||||||
| 1983 | 46.20 | k | 48.65 | k | 53.38 | b | 58.62 | i | 72.81 | j | 78.90 | 82.88 | n | 87.55 | 78.57 | 69.75 | k | 49.70 | j | 44.11 | l | 74.60 | ||||
| 1984 | 44.52 | j | 51.70 | i | 60.38 | j | 57.95 | i | 71.55 | i | 77.60 | j | 94.14 | j | 92.61 | m | 83.16 | k | 62.73 | i | 46.84 | k | 42.55 | k | 9999.00 | |
| 1985 | 48.18 | i | 52.79 | i | 54.24 | j | 69.63 | 72.86 | i | 85.54 | q | 94.59 | i | 87.55 | 75.07 | 68.62 | b | 48.71 | m | 47.62 | j | 75.22 | ||||
| 1986 | 52.14 | j | 54.84 | i | 63.48 | j | 65.29 | i | 71.70 | k | 87.29 | i | 88.91 | i | 96.38 | j | 73.50 | 72.23 | 58.39 | l | 44.06 | m | 72.86 | |||
| 1987 | 45.70 | k | 51.21 | i | 57.05 | i | 73.90 | 79.05 | i | 87.77 | 87.09 | i | 91.86 | j | 85.95 | i | 81.00 | j | 57.53 | k | 45.85 | k | 80.83 | |||
| 1988 | 41.47 | l | 59.55 | 62.20 | a | 66.95 | i | 71.40 | k | 80.23 | 96.20 | k | 94.77 | 87.95 | j | 80.80 | k | 54.32 | k | 45.86 | j | 74.19 | ||||
| 1989 | 41.60 | k | 48.32 | 55.42 | 69.67 | 70.68 | 83.37 | 90.77 | 86.94 | 82.40 | 69.77 | 56.25 | j | 48.86 | i | 73.04 | ||||||||||
| 1990 | 47.29 | j | 44.17 | j | 62.32 | 72.40 | 69.74 | 80.05 | i | 91.76 | j | 89.06 | 84.39 | l | 72.70 | k | 51.94 | l | 42.25 | k | 73.38 | |||||
| 1991 | 49.20 | k | 60.32 | i | 51.19 | j | 62.06 | l | 67.24 | j | 77.45 | j | 92.58 | 90.10 | 90.33 | 77.39 | 56.29 | i | 44.19 | 78.92 | ||||||
| 1992 | 48.00 | j | 58.16 | j | 63.45 | i | 68.48 | i | 82.25 | k | 84.10 | 89.71 | j | 95.68 | i | 85.57 | i | 72.71 | j | 54.63 | k | 42.55 | i | 84.10 | ||
| 1993 | 38.33 | m | 47.53 | i | 59.71 | j | 60.54 | b | 69.86 | i | 76.40 | 83.38 | j | 87.42 | 85.40 | j | 71.90 | k | 55.70 | 44.29 | 64.87 | |||||
| 1994 | 47.83 | m | 50.17 | j | 63.65 | 68.05 | j | 75.11 | l | 80.79 | k | 97.10 | k | 92.59 | i | 88.43 | i | 70.61 | m | 45.50 | j | 46.24 | j | 63.65 | ||
| 1995 | 49.25 | k | 60.21 | i | 54.61 | 63.50 | j | 70.89 | m | 76.48 | i | 86.25 | k | 88.55 | 85.81 | i | 72.41 | i | 61.60 | 51.23 | r | 68.25 | ||||
| 1996 | 43.76 | n | 55.12 | l | 59.82 | i | 63.60 | 70.91 | i | 82.10 | a | 94.10 | 93.35 | 81.20 | 68.71 | 55.95 | k | 44.95 | k | 80.51 | ||||||
| 1997 | 43.90 | k | 51.50 | j | 62.19 | j | 62.73 | h | 79.36 | i | 80.83 | 88.41 | i | 88.09 | i | 81.47 | 67.82 | i | 55.21 | k | 44.19 | j | 81.15 | |||
| 1998 | 45.05 | k | 47.72 | j | 57.32 | i | 61.93 | a | 61.74 | l | 80.40 | j | 94.23 | i | 94.33 | j | 86.90 | i | 70.19 | j | 50.62 | i | 43.32 | i | 61.93 | |
| 1999 | 46.74 | l | 46.42 | i | 53.61 | 62.07 | 72.15 | k | 80.83 | 91.48 | j | 88.91 | i | 87.38 | i | 74.80 | k | 58.11 | l | 46.19 | j | 65.50 | ||||
| 2000 | 46.95 | k | 52.10 | i | 57.90 | a | 69.26 | k | 71.55 | i | 86.07 | 89.45 | k | 92.73 | i | 84.90 | j | 69.15 | k | 49.33 | i | 46.11 | m | 71.98 | ||
| 2001 | 48.62 | j | 49.42 | i | 62.15 | k | 62.29 | i | 80.64 | i | 82.10 | j | 91.90 | j | 93.37 | a | 83.50 | l | 75.71 | j | 53.95 | i | 45.56 | m | 93.37 | |
| 2002 | 46.48 | j | 56.47 | i | 58.48 | j | 68.87 | 71.64 | i | 86.90 | j | 97.14 | j | 91.91 | i | 87.80 | j | 73.82 | i | 57.58 | k | 45.62 | j | 68.87 | ||
| 2003 | 48.19 | j | 54.37 | i | 60.14 | j | 57.41 | h | 74.48 | j | 90.19 | i | 97.18 | i | 91.00 | j | 86.95 | i | 76.55 | i | 52.11 | l | 48.14 | j | 9999.00 | |
| 2004 | 44.80 | k | 51.84 | j | 65.91 | h | 68.45 | h | 74.05 | j | 86.14 | i | 94.33 | j | 91.18 | i | 83.33 | i | 70.40 | k | 54.90 | j | 46.35 | k | 9999.00 | |
| 2005 | 41.65 | k | 56.63 | i | 62.26 | h | 63.10 | i | 71.38 | j | 76.27 | h | 95.35 | k | 93.87 | h | 83.62 | i | 72.85 | k | 53.35 | j | 43.52 | j | 9999.00 | |
| 2006 | 43.60 | k | 54.42 | i | 49.74 | h | 63.90 | j | 78.68 | i | 84.73 | h | 96.55 | k | 89.30 | h | 86.45 | j | 72.43 | j | 54.75 | j | 47.70 | k | 9999.00 | |
| 2007 | 45.50 | k | 49.79 | i | 62.86 | i | 67.57 | i | 78.55 | i | 84.81 | i | 92.70 | k | 92.52 | h | 83.63 | k | 64.82 | i | 57.95 | j | 44.74 | l | 9999.00 | |
| 2008 | 39.57 | j | 50.05 | i | 58.71 | j | 61.92 | f | 73.00 | j | 81.90 | i | 92.86 | i | 92.10 | j | 89.29 | i | 73.95 | i | 54.67 | l | 47.10 | j | 9999.00 | |
| 2009 | 51.00 | k | 53.88 | t | 58.05 | i | 66.41 | h | 76.35 | k | ----- | 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 | 47.69 | r | 48.75 | p | 53.37 | l | 58.75 | n | 67.61 | m | 77.94 | m | 87.47 | p | 92.56 | m | 89.53 | m | 67.89 | m | 55.50 | n | 48.06 | o | 9999.00 | |
| 2012 | 49.80 | p | 53.08 | q | 52.28 | m | 62.71 | m | 76.28 | m | 80.53 | m | 91.80 | p | 95.83 | m | 92.57 | p | 57.45 | i | 45.38 | d | 37.11 | c | 41.25 | |
| 2013 | 36.22 | d | 42.05 | i | 52.12 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | z | 36.22 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 42.45 | 51.07 | 57.40 | 65.17 | 73.13 | 81.82 | 91.45 | 89.93 | 83.34 | 70.73 | 54.46 | 43.52 | 67.23 | |||||||||||||
| S.D. | 4.21 | 4.42 | 3.73 | 4.92 | 4.47 | 4.05 | 2.61 | 3.73 | 4.10 | 4.08 | 4.16 | 3.38 | 1.29 | |||||||||||||
| SKEW | -0.85 | -0.34 | -0.16 | -0.14 | -0.45 | -0.14 | -0.31 | -0.17 | -0.30 | 0.02 | 0.29 | -0.99 | 0.34 | |||||||||||||
| MAX | 49.68 | 59.55 | 63.65 | 73.90 | 80.61 | 90.80 | 96.16 | 97.35 | 90.77 | 78.39 | 62.43 | 49.39 | 70.57 | |||||||||||||
| MIN | 29.90 | 40.54 | 48.29 | 53.00 | 61.71 | 72.03 | 86.00 | 79.90 | 73.50 | 60.79 | 45.38 | 32.77 | 64.33 | |||||||||||||
| NO YRS | 34 | 37 | 43 | 45 | 40 | 56 | 50 | 57 | 53 | 43 | 35 | 38 | 26 | |||||||||||||