| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 58.17 | u | 66.47 | 65.89 | 56.18 | 50.13 | 39.37 | 33.37 | 51.90 | |||||||
| 1946 | 35.98 | 37.36 | 40.40 | 46.68 | 52.06 | 56.85 | 64.31 | 64.47 | 55.63 | 42.77 | 35.85 | 36.34 | 47.39 | |||||||||||||
| 1947 | 31.45 | 37.82 | 43.66 | 47.30 | 56.84 | 56.13 | 63.85 | 60.16 | 57.87 | 49.61 | 39.27 | 36.71 | 48.39 | |||||||||||||
| 1948 | 33.31 | 32.47 | 37.32 | 42.70 | 48.84 | 60.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.11 | 40.52 | ||||||||
| 1949 | 17.05 | 31.95 | ----- | z | ----- | z | 55.58 | m | 59.03 | 63.85 | 63.43 | a | 58.62 | 43.90 | 44.38 | 34.53 | 46.31 | |||||||||
| 1950 | 18.57 | a | 34.70 | 38.47 | 42.98 | h | 46.11 | l | 55.17 | 64.25 | g | ----- | z | 59.43 | 51.50 | 41.65 | 41.61 | 42.64 | ||||||||
| 1951 | 32.74 | 36.14 | 38.38 | a | 46.95 | 52.65 | 59.22 | 65.34 | 62.55 | 58.53 | 48.26 | 38.60 | a | 31.73 | 47.59 | |||||||||||
| 1952 | 29.60 | 36.76 | 37.50 | 49.28 | 52.32 | 57.05 | a | ----- | z | 63.68 | 60.15 | 53.58 | 33.15 | 33.35 | 46.04 | |||||||||||
| 1953 | 43.15 | 37.77 | 41.08 | 42.48 | 49.28 | a | 54.28 | 64.38 | a | 63.23 | 60.33 | a | 50.19 | 44.15 | 38.87 | 49.10 | ||||||||||
| 1954 | 33.32 | a | 38.75 | 35.92 | 44.97 | 52.13 | 54.62 | 64.97 | 59.58 | 54.77 | 45.65 | a | 44.22 | 32.56 | 46.79 | |||||||||||
| 1955 | 33.18 | 32.43 | 35.65 | 39.37 | 48.65 | 58.43 | 61.05 | 62.48 | 57.85 | 50.13 | 34.97 | 32.97 | 45.60 | |||||||||||||
| 1956 | 33.11 | 30.16 | 39.11 | 47.02 | 53.71 | 54.43 | 65.68 | 62.19 | 56.47 | 48.35 | 35.95 | 37.02 | 46.93 | |||||||||||||
| 1957 | 18.69 | 33.00 | u | 42.14 | x | 45.75 | 53.98 | 60.18 | 61.31 | 59.66 | 59.95 | 47.08 | m | 38.87 | 38.94 | 48.59 | ||||||||||
| 1958 | 36.27 | 43.18 | 37.40 | 44.88 | 57.15 | 61.77 | 67.52 | 68.77 | 57.20 | 51.24 | 39.52 | 40.29 | 50.43 | |||||||||||||
| 1959 | 35.71 | 33.73 | 41.08 | 50.25 | z | 50.08 | e | 58.30 | 65.58 | 61.79 | 55.47 | 49.63 | 37.67 | 32.19 | 47.38 | |||||||||||
| 1960 | 25.60 | g | ----- | z | ----- | z | ----- | z | ----- | z | 56.79 | m | 68.94 | 61.44 | 56.32 | 49.40 | 38.82 | 32.27 | 51.20 | |||||||
| 1961 | 36.06 | 42.73 | 41.63 | 44.45 | b | ----- | z | ----- | z | 67.23 | 69.00 | f | 53.23 | b | 47.92 | e | 35.09 | g | 34.76 | b | 46.00 | |||||
| 1962 | 30.09 | d | 34.66 | 39.08 | a | 48.78 | a | 47.73 | e | 56.29 | f | 63.85 | d | 62.18 | f | 58.50 | c | 49.37 | e | 42.09 | g | 37.38 | a | 45.49 | ||
| 1963 | 27.69 | 42.62 | b | 40.24 | 43.05 | 52.17 | a | 57.77 | b | 60.58 | 63.76 | 62.81 | c | 50.29 | c | 40.98 | e | 32.96 | d | 47.91 | ||||||
| 1964 | 34.65 | a | 37.23 | e | 36.11 | d | 41.83 | a | 47.40 | f | 56.83 | c | ----- | z | 61.79 | g | 56.47 | a | 48.71 | c | 37.18 | b | 31.37 | a | 42.26 | |
| 1965 | 34.20 | f | 39.39 | f | 36.92 | a | 47.00 | 48.82 | 58.38 | 64.03 | b | 63.48 | c | 51.95 | 53.60 | b | 42.46 | d | 34.52 | a | 50.12 | |||||
| 1966 | 33.75 | a | 35.31 | b | 40.85 | 45.19 | a | 54.86 | c | 56.96 | g | 61.72 | f | 64.48 | f | 59.00 | b | 50.83 | d | 42.34 | b | 37.55 | a | 44.41 | ||
| 1967 | 37.92 | 39.54 | 37.61 | 39.04 | d | 49.88 | e | 58.91 | a | 65.11 | 67.86 | f | 62.16 | b | 49.44 | d | 39.75 | h | 32.72 | m | 48.85 | |||||
| 1968 | 35.65 | h | 37.48 | f | 44.29 | n | ----- | z | 51.13 | l | 59.31 | f | 66.46 | h | 62.34 | 58.08 | 47.45 | b | 39.37 | 30.00 | 47.45 | |||||
| 1969 | 22.60 | 33.16 | 40.03 | a | 44.18 | 53.89 | 60.77 | 61.32 | 61.13 | 57.98 | 44.52 | d | 40.03 | 33.79 | 46.12 | |||||||||||
| 1970 | 34.93 | a | 38.02 | 39.61 | d | 41.10 | 52.11 | 63.90 | e | 67.61 | d | 65.11 | 54.15 | 46.24 | f | 39.96 | d | 32.48 | 48.09 | |||||||
| 1971 | 35.65 | 36.27 | 35.90 | 42.33 | 50.52 | 53.90 | 63.08 | 66.44 | 51.90 | 46.56 | 39.68 | 33.89 | 46.34 | |||||||||||||
| 1972 | 31.85 | 37.88 | 44.50 | 42.37 | 52.85 | 59.24 | a | 64.08 | 65.61 | 55.87 | 48.11 | i | 42.18 | 28.18 | 47.69 | |||||||||||
| 1973 | 31.56 | 38.16 | i | 41.71 | 45.80 | 54.60 | 60.05 | 68.18 | i | 64.31 | d | 57.78 | c | 48.98 | 39.82 | 38.37 | d | 48.30 | ||||||||
| 1974 | 27.94 | 39.09 | 40.18 | c | 44.76 | g | 49.54 | q | 61.80 | 63.20 | a | 64.66 | b | 60.70 | h | 50.87 | 43.20 | 38.93 | c | 47.76 | ||||||
| 1975 | 37.42 | 36.50 | c | 37.76 | 43.23 | 52.58 | 58.13 | 68.89 | 63.02 | g | 56.67 | 68.89 | 36.76 | e | 38.75 | w | 49.68 | |||||||||
| 1976 | 36.02 | i | 32.72 | 35.55 | 41.60 | 49.19 | 51.77 | 62.77 | 59.69 | 59.52 | 51.19 | 42.18 | 34.82 | 47.37 | ||||||||||||
| 1977 | 29.23 | 39.66 | 37.38 | f | 48.77 | 48.00 | 65.33 | 65.89 | 72.00 | 58.80 | 51.92 | a | 39.62 | 34.48 | 50.34 | |||||||||||
| 1978 | 34.47 | 39.59 | 44.76 | 44.38 | 48.76 | 58.22 | 64.94 | 64.92 | 59.07 | 51.74 | 34.35 | 30.08 | 47.94 | |||||||||||||
| 1979 | 15.76 | b | 35.29 | 41.66 | 43.83 | 51.95 | 59.38 | 64.97 | 64.34 | 61.08 | 51.44 | 35.33 | 38.18 | 46.93 | ||||||||||||
| 1980 | 27.76 | 37.55 | 39.16 | 47.90 | a | 50.48 | 53.08 | 63.44 | 64.11 | 60.52 | 49.47 | 43.22 | 41.66 | 48.20 | ||||||||||||
| 1981 | 36.29 | 38.14 | 41.24 | 46.60 | 52.53 | 55.45 | 59.98 | 64.02 | 57.75 | 48.68 | 41.22 | 37.06 | 48.25 | |||||||||||||
| 1982 | 33.79 | 35.00 | 40.00 | 42.58 | 50.66 | 61.73 | 65.13 | 65.84 | 56.75 | 48.21 | 34.90 | 34.29 | 47.41 | |||||||||||||
| 1983 | 41.40 | 42.27 | 47.31 | 44.22 | 55.35 | 58.27 | 63.11 | 67.02 | 55.38 | 50.73 | 43.50 | 25.42 | 49.50 | |||||||||||||
| 1984 | 37.13 | 37.45 | 41.97 | 42.32 | 49.24 | 53.45 | 63.08 | 62.56 | 52.93 | 41.87 | 34.68 | 27.52 | 45.35 | |||||||||||||
| 1985 | 27.05 | 29.91 | 36.00 | 47.67 | 52.16 | 57.33 | 69.60 | 61.30 | i | 51.18 | 47.02 | 26.03 | 24.55 | a | 42.59 | |||||||||||
| 1986 | 37.65 | 37.89 | a | 45.95 | 42.78 | 53.11 | 63.32 | 59.55 | 69.00 | 56.27 | o | 47.69 | 39.21 | a | 30.82 | 47.91 | ||||||||||
| 1987 | 30.35 | 35.98 | 40.68 | 49.32 | 54.10 | 61.42 | 63.27 | 63.10 | 60.15 | 52.18 | 39.32 | 32.78 | a | 48.55 | ||||||||||||
| 1988 | 31.26 | 38.45 | 40.19 | 47.55 | 49.52 | 56.52 | 65.87 | 64.15 | 57.32 | 53.90 | 39.08 | 34.87 | 48.22 | |||||||||||||
| 1989 | 35.84 | 24.36 | 40.60 | 47.80 | 50.71 | 59.95 | 62.45 | j | 61.24 | 55.65 | 46.71 | 41.32 | 32.40 | 45.14 | ||||||||||||
| 1990 | 36.31 | 35.04 | 41.37 | 48.70 | 49.19 | 59.05 | 67.03 | 65.05 | 61.22 | 48.63 | 41.87 | 24.08 | l | 50.31 | ||||||||||||
| 1991 | 32.11 | 42.45 | 38.61 | 43.40 | 48.39 | 54.18 | 65.66 | 68.56 | 61.25 | 49.32 | 40.28 | 34.89 | 48.26 | |||||||||||||
| 1992 | 37.52 | 42.50 | 46.00 | 49.87 | 57.47 | 64.30 | 66.35 | 67.63 | 58.42 | 51.53 | 37.58 | 29.45 | 50.72 | |||||||||||||
| 1993 | 24.55 | 29.11 | 42.97 | 46.50 | 58.31 | 58.43 | 56.11 | 61.15 | 57.43 | 51.06 | 31.42 | 39.14 | q | 47.00 | ||||||||||||
| 1994 | 32.18 | q | 29.57 | 38.44 | 44.78 | 50.34 | 54.25 | 67.60 | 65.97 | 62.80 | 48.73 | 37.12 | 34.73 | 48.57 | ||||||||||||
| 1995 | 35.47 | 40.82 | 42.48 | 45.73 | 53.02 | 57.85 | 65.32 | 60.65 | 59.70 | 45.95 | 41.42 | 31.65 | 48.34 | |||||||||||||
| 1996 | 32.69 | 33.29 | 42.26 | 46.17 | 48.06 | 61.44 | v | 65.97 | 65.66 | 54.37 | 48.29 | 38.35 | 32.93 | c | 46.19 | |||||||||||
| 1997 | 33.03 | 34.48 | b | 41.23 | 43.52 | 54.60 | a | 57.35 | 64.16 | 66.82 | q | 61.88 | 50.32 | 44.35 | 37.71 | 47.51 | ||||||||||
| 1998 | ----- | z | 39.16 | 43.84 | 48.83 | 53.13 | 59.18 | b | 68.41 | n | 67.05 | 58.86 | w | 43.75 | z | 43.65 | 37.63 | 49.06 | ||||||||
| 1999 | 41.61 | 41.54 | ----- | z | 46.62 | 52.50 | 58.75 | b | 65.53 | 68.66 | c | 60.19 | i | 51.46 | d | 48.18 | b | 39.11 | 51.40 | |||||||
| 2000 | 38.75 | o | ----- | z | 44.17 | m | 49.95 | 52.44 | 58.75 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.19 | |||
| 2001 | ----- | z | 38.68 | 44.11 | 44.92 | 58.06 | f | 58.17 | 64.97 | 68.08 | 61.27 | 50.77 | 43.83 | 37.34 | 51.21 | |||||||||||
| 2002 | 38.18 | 41.00 | 39.74 | 47.15 | 52.87 | 61.10 | 67.94 | 61.92 | 57.97 | 48.56 | 43.92 | 40.27 | 50.05 | |||||||||||||
| 2003 | 43.17 | y | ----- | z | ----- | z | 47.90 | 56.11 | 63.87 | 72.21 | 69.40 | 63.73 | 56.23 | 40.47 | 39.29 | 56.58 | ||||||||||
| 2004 | 35.92 | 41.24 | 48.58 | 51.45 | 56.08 | g | 62.32 | 68.97 | 67.65 | n | 60.96 | e | 52.69 | 43.38 | 39.61 | 50.51 | ||||||||||
| 2005 | 39.48 | 40.64 | 46.74 | 49.23 | 57.02 | 60.80 | 71.40 | 70.53 | 58.87 | 54.19 | 40.43 | 35.62 | b | 52.08 | ||||||||||||
| 2006 | 41.66 | 39.20 | 43.35 | 49.17 | 59.65 | 66.57 | 73.89 | 70.56 | 64.37 | 53.29 | 46.62 | 39.52 | g | 55.30 | ||||||||||||
| 2007 | 38.29 | 45.27 | 50.79 | 51.77 | 58.73 | 65.18 | 74.18 | 68.74 | 60.48 | d | 52.23 | 45.67 | 41.23 | 54.38 | ||||||||||||
| 2008 | ----- | z | 44.56 | c | 42.95 | 47.55 | 56.63 | 59.98 | 69.76 | 67.92 | 61.45 | 53.02 | 47.78 | 39.50 | e | 53.74 | ||||||||||
| 2009 | 39.77 | 43.71 | k | 43.23 | 49.18 | 57.77 | 63.48 | 71.85 | 70.53 | 63.97 | 49.72 | k | 45.45 | 25.57 | x | 56.14 | ||||||||||
| 2010 | ----- | z | ----- | z | 42.31 | m | 43.45 | h | 49.61 | 56.23 | 64.44 | 61.36 | i | 58.90 | 49.95 | 37.48 | 34.40 | 50.15 | ||||||||
| 2011 | 35.02 | 34.05 | 40.24 | 41.45 | 48.31 | 55.70 | 61.45 | 64.02 | 61.37 | 48.45 | 39.35 | 33.94 | 46.94 | |||||||||||||
| 2012 | 36.47 | 34.60 | 40.74 | 47.07 | 50.95 | 56.45 | 64.87 | 65.60 | 55.83 | g | 39.44 | 36.93 | 31.00 | 45.83 | ||||||||||||
| 2013 | 29.94 | 35.84 | 38.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.87 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 32.99 | 37.01 | 40.84 | 45.73 | 52.39 | 58.74 | 65.40 | 64.83 | 58.32 | 49.81 | 40.00 | 34.66 | 48.29 | |||||||||||||
| S.D. | 5.98 | 4.14 | 3.31 | 2.94 | 3.10 | 3.32 | 3.43 | 3.12 | 3.03 | 3.91 | 3.97 | 3.93 | 1.98 | |||||||||||||
| SKEW | -1.09 | -0.43 | 0.66 | -0.16 | 0.49 | 0.23 | 0.33 | 0.32 | -0.27 | 1.42 | -0.60 | -0.31 | 1.20 | |||||||||||||
| MAX | 43.15 | 45.27 | 50.79 | 51.77 | 59.65 | 66.57 | 74.18 | 72.00 | 64.37 | 68.89 | 48.18 | 41.66 | 54.38 | |||||||||||||
| MIN | 15.76 | 24.36 | 35.55 | 39.04 | 47.73 | 51.77 | 56.11 | 59.58 | 51.18 | 39.44 | 26.03 | 24.55 | 45.35 | |||||||||||||
| NO YRS | 57 | 59 | 59 | 60 | 58 | 60 | 58 | 55 | 61 | 61 | 63 | 61 | 27 | |||||||||||||