YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.03 | 27.63 | a | 34.83 | j | |
1928 | 26.35 | 29.17 | 37.61 | 48.07 | a | 70.87 | 71.93 | 79.22 | m | 76.65 | 63.60 | 56.81 | 40.83 | 34.31 | e | 50.56 | a | |||||||||
1929 | 15.68 | c | 21.56 | a | 40.71 | 54.87 | 63.65 | 72.87 | 79.74 | 77.64 | f | 69.67 | 57.19 | 39.07 | a | 27.00 | 49.27 | a | ||||||||
1930 | 18.94 | 33.75 | 38.60 | a | 57.21 | a | 68.29 | 78.23 | 82.73 | a | 83.97 | 74.72 | a | 55.13 | 48.52 | a | 31.06 | 55.93 | ||||||||
1931 | 32.45 | 37.50 | 38.16 | 58.83 | 68.03 | 80.10 | 84.30 | d | 77.15 | e | 76.47 | 62.23 | 52.70 | c | 38.84 | 58.90 | ||||||||||
1932 | 33.65 | e | 31.48 | 30.97 | 52.63 | 69.07 | a | 79.10 | 81.90 | 81.65 | 70.83 | 56.16 | 40.24 | a | 27.57 | a | 54.60 | |||||||||
1933 | 35.27 | a | 22.43 | 34.47 | a | 51.70 | 68.94 | 85.66 | a | 84.61 | 80.23 | 76.57 | 55.23 | 38.80 | 25.77 | 54.97 | ||||||||||
1934 | 31.75 | c | 22.93 | 35.23 | 49.64 | b | 75.54 | c | 80.27 | 82.03 | 76.81 | 68.97 | a | 61.23 | a | 48.23 | 30.16 | 55.23 | ||||||||
1935 | 24.87 | 33.00 | 43.23 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.52 | d | 43.10 | i | 27.14 | b | 36.15 | g | |||
1936 | 20.00 | c | 10.57 | f | 43.14 | q | 44.62 | a | 72.37 | a | 73.12 | d | 84.60 | a | 77.03 | 73.45 | a | 53.65 | 35.79 | b | 30.52 | 56.51 | b | |||
1937 | 21.28 | b | 27.71 | 36.10 | 48.83 | 68.04 | c | 74.27 | 84.87 | a | 86.00 | a | 70.77 | 49.73 | a | 36.24 | a | 24.52 | 52.36 | |||||||
1938 | 21.93 | a | 29.00 | 39.58 | g | 58.15 | d | 64.65 | 73.79 | a | 78.03 | 80.29 | 66.83 | a | 63.10 | 40.90 | 27.85 | e | 54.96 | a | ||||||
1939 | 30.37 | a | 25.18 | 39.97 | 51.33 | 71.74 | 75.32 | b | 81.61 | 78.23 | 72.10 | a | 54.45 | 44.40 | 34.17 | a | 54.91 | |||||||||
1940 | 18.94 | 28.79 | 30.10 | 47.83 | a | 62.40 | a | 74.10 | 80.13 | 73.48 | 71.20 | 57.32 | 36.93 | 30.60 | f | 52.84 | a | |||||||||
1941 | 24.86 | b | 27.32 | 34.53 | a | 61.43 | 71.29 | 77.70 | 80.48 | 77.32 | c | 71.11 | b | 56.63 | a | 46.12 | f | 34.81 | 56.14 | a | ||||||
1942 | 25.93 | a | 30.18 | 44.48 | b | 64.44 | c | 64.71 | 72.59 | a | 77.00 | 75.72 | b | 65.52 | c | 67.06 | m | ----- | z | 22.32 | c | 54.29 | b | |||
1943 | ----- | z | 23.95 | i | 29.81 | 46.17 | a | 61.20 | a | 73.77 | 81.80 | a | 77.23 | 63.33 | 56.68 | 35.40 | e | 31.41 | b | 55.68 | b | |||||
1944 | 35.10 | a | 29.64 | a | 33.76 | b | 53.04 | c | 70.94 | 78.71 | f | 80.53 | a | 81.67 | a | 69.21 | b | 61.52 | b | ----- | z | 27.11 | l | 57.27 | c | |
1945 | 16.86 | i | 30.04 | d | 52.96 | h | 53.77 | 61.61 | 70.74 | c | 76.04 | c | 78.50 | e | 69.30 | g | 56.44 | d | 43.62 | q | 23.20 | k | 61.02 | e | ||
1946 | 24.55 | k | 27.47 | m | 51.20 | k | 57.17 | 66.26 | d | 74.73 | 79.55 | 76.13 | 70.43 | b | 63.26 | d | ----- | z | ----- | z | 69.65 | e | ||||
1947 | ----- | z | ----- | z | ----- | z | 46.25 | b | 59.16 | f | 69.09 | g | 81.13 | 85.81 | 72.95 | j | 69.00 | b | 44.67 | r | 26.68 | i | 70.55 | h | ||
1948 | 19.09 | i | 25.83 | k | 31.92 | s | 58.44 | c | 68.28 | b | 75.21 | a | 79.38 | e | 78.52 | 76.50 | 56.43 | c | 41.08 | f | 25.11 | c | 64.73 | d | ||
1949 | 26.72 | b | 27.65 | e | 32.79 | c | 58.37 | 70.63 | a | 81.03 | 80.20 | a | 80.35 | 66.14 | a | 63.57 | c | 40.05 | h | ----- | z | 58.75 | b | |||
1950 | ----- | z | ----- | z | 31.76 | f | 39.11 | k | 67.41 | d | 76.83 | ----- | z | ----- | z | 67.42 | k | ----- | z | ----- | z | ----- | z | 72.12 | j | |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.42 | k | 53.30 | a | 45.19 | d | 31.33 | d | 43.28 | i |
1953 | 25.00 | s | 27.50 | 38.83 | g | 47.15 | d | 68.23 | 76.47 | 79.93 | a | 77.84 | 70.77 | 65.00 | 48.17 | a | 28.04 | h | 62.34 | c | ||||||
1954 | 21.77 | a | 32.39 | 32.34 | b | ----- | z | 66.94 | n | 79.10 | 79.71 | 75.77 | 64.23 | 53.71 | 41.70 | 28.23 | 50.90 | b | ||||||||
1955 | 22.35 | 25.04 | 34.00 | 59.93 | 71.03 | 74.60 | 84.77 | 81.32 | 68.37 | 57.90 | 33.73 | 22.19 | 52.94 | |||||||||||||
1956 | 27.03 | 27.72 | 34.23 | 47.21 | a | ----- | z | 76.40 | 74.03 | 75.00 | 64.70 | 63.45 | 37.37 | 29.29 | 50.58 | a | ||||||||||
1957 | 16.63 | a | 29.04 | 38.61 | 53.30 | 65.28 | b | 73.57 | 81.13 | 76.65 | 66.70 | 56.13 | a | 36.70 | 28.06 | 51.82 | ||||||||||
1958 | 25.84 | 23.50 | 37.74 | 54.47 | 66.35 | 70.00 | 76.48 | 76.45 | 68.03 | 56.35 | 40.93 | 20.26 | 51.37 | |||||||||||||
1959 | 17.68 | 24.43 | 36.65 | 51.67 | 70.37 | a | 76.13 | 78.81 | 78.58 | 69.03 | 48.39 | 30.50 | 32.94 | 51.26 | ||||||||||||
1960 | 24.73 | a | 27.55 | 31.71 | 52.93 | 63.65 | 72.55 | a | 77.50 | a | 77.55 | 67.67 | 55.65 | 42.80 | 24.58 | 51.57 | ||||||||||
1961 | 22.26 | 33.93 | 39.61 | 48.03 | 65.00 | 75.27 | 77.65 | 77.23 | a | 66.37 | 58.32 | 38.57 | 24.45 | 52.22 | ||||||||||||
1962 | 18.30 | a | 22.43 | 37.39 | 50.57 | 67.90 | 73.37 | 75.30 | a | 76.45 | 62.80 | 56.87 | 38.59 | a | 24.45 | 50.37 | ||||||||||
1963 | 11.77 | 19.32 | 39.81 | 56.90 | 63.74 | 77.77 | 80.60 | a | 74.65 | 68.23 | 67.23 | a | 44.27 | 20.87 | 52.10 | |||||||||||
1964 | 29.68 | 30.24 | 34.29 | 53.00 | 69.94 | 75.53 | 80.70 | a | 70.97 | 64.30 | 55.03 | 43.40 | 22.84 | 52.49 | ||||||||||||
1965 | 20.74 | 24.46 | 31.55 | 48.03 | 70.55 | 73.34 | a | 76.58 | 75.10 | a | 61.23 | 57.10 | 38.37 | 30.03 | 50.59 | |||||||||||
1966 | 19.07 | a | 26.93 | 39.35 | 47.90 | 61.20 | a | 77.97 | a | 82.35 | 73.26 | 67.55 | a | 54.52 | 35.90 | 26.00 | 51.00 | |||||||||
1967 | 25.39 | 20.18 | 37.71 | 52.67 | 61.10 | 73.43 | 76.06 | 72.65 | 68.24 | a | 52.61 | 33.97 | 27.48 | 50.12 | ||||||||||||
1968 | 21.58 | 25.93 | 45.90 | a | 55.73 | 62.53 | a | 72.45 | a | 76.39 | 75.94 | 66.69 | a | 59.52 | 38.23 | 25.42 | 52.19 | |||||||||
1969 | 21.87 | a | 30.82 | 36.87 | 56.00 | 67.10 | 65.63 | 77.33 | a | 81.94 | 66.23 | 47.67 | a | 39.03 | 28.30 | a | 51.57 | |||||||||
1970 | 19.29 | 27.00 | 36.13 | 53.23 | 63.94 | 76.28 | a | 80.35 | 79.32 | 67.33 | 56.84 | 37.40 | 26.60 | a | 51.98 | |||||||||||
1971 | 17.77 | 26.79 | 34.97 | 53.31 | a | 64.19 | 77.87 | 75.45 | 74.81 | 67.93 | 60.97 | 38.27 | 28.39 | 51.73 | ||||||||||||
1972 | 20.06 | 23.86 | 34.55 | 47.62 | a | 71.19 | 73.45 | a | 75.76 | b | 75.35 | 65.93 | 50.77 | 34.73 | 21.23 | 49.54 | ||||||||||
1973 | 26.68 | 27.46 | 44.35 | 50.23 | 59.41 | b | 73.93 | 77.87 | 75.16 | 64.21 | a | 61.13 | a | 36.70 | 23.68 | 51.74 | ||||||||||
1974 | 20.97 | 25.93 | 36.30 | a | 54.87 | 62.29 | 70.33 | 78.55 | 72.20 | a | 60.33 | 54.13 | 39.23 | 30.06 | 50.43 | |||||||||||
1975 | 23.77 | 26.86 | 33.81 | 47.83 | a | 71.32 | 72.00 | 78.81 | 74.16 | 61.00 | 60.74 | 44.80 | 25.39 | 51.71 | ||||||||||||
1976 | 19.52 | 32.86 | 35.39 | 56.83 | 65.10 | a | 77.87 | 79.84 | 76.00 | d | 68.34 | a | 50.35 | 31.50 | 17.19 | 50.90 | ||||||||||
1977 | 12.32 | 27.43 | 43.16 | 60.00 | 75.65 | 71.90 | 79.53 | a | 70.52 | 63.10 | 56.23 | 38.23 | 22.58 | 51.72 | ||||||||||||
1978 | 19.26 | 22.86 | 37.58 | 49.67 | 70.52 | 73.28 | a | 73.13 | a | 74.39 | 67.30 | 52.68 | 38.55 | a | 21.40 | a | 50.05 | |||||||||
1979 | 12.71 | 19.93 | 36.35 | 47.40 | 62.00 | 72.10 | 76.71 | 70.81 | 67.27 | 49.65 | 35.33 | 30.74 | 48.42 | |||||||||||||
1980 | 21.26 | 23.54 | a | 34.87 | 56.23 | 71.13 | 72.28 | a | 77.19 | 73.00 | a | 64.23 | 49.16 | 38.50 | b | 22.71 | 50.34 | |||||||||
1981 | 22.60 | a | 28.61 | 40.87 | 55.03 | 64.77 | 70.80 | 74.24 | b | 72.16 | 62.30 | 49.61 | 42.17 | 25.03 | 50.68 | |||||||||||
1982 | 13.77 | 24.11 | 34.26 | 47.24 | a | 70.19 | 66.43 | 75.43 | a | 69.35 | 61.33 | 55.52 | 36.73 | 28.52 | 48.57 | |||||||||||
1983 | 24.13 | 31.50 | 36.32 | 47.62 | a | 59.97 | 72.57 | b | 79.13 | 77.06 | 66.28 | a | 53.06 | 37.80 | 15.13 | 50.05 | ||||||||||
1984 | 19.23 | 33.83 | 31.77 | 54.87 | 62.93 | a | 73.10 | 74.48 | 74.65 | 62.07 | 55.19 | 38.10 | 26.06 | 50.52 | ||||||||||||
1985 | 19.16 | 23.75 | 41.42 | 55.57 | 67.84 | 68.83 | 73.71 | 69.77 | 63.77 | 54.84 | 32.50 | 15.90 | 48.92 | |||||||||||||
1986 | 23.52 | 24.64 | 39.55 | 58.40 | 68.10 | b | 71.14 | a | 75.67 | a | 69.39 | 63.27 | 53.71 | 33.93 | 27.23 | 50.71 | ||||||||||
1987 | 26.35 | 34.79 | 43.81 | 62.20 | 69.06 | 76.03 | 77.13 | 72.23 | a | 66.77 | 48.87 | 39.97 | 28.58 | 53.82 | ||||||||||||
1988 | 19.73 | a | 22.31 | 36.58 | 56.00 | 72.45 | 78.27 | 79.65 | 76.06 | 65.03 | 47.55 | 36.40 | 24.77 | 51.23 | ||||||||||||
1989 | 28.90 | 21.00 | 33.58 | 50.73 | 65.55 | 70.52 | a | 77.90 | 73.65 | 66.17 | 57.94 | 32.80 | 15.26 | 49.50 | ||||||||||||
1990 | 31.61 | 30.07 | a | 42.13 | 58.10 | 62.94 | 72.93 | 74.29 | 72.16 | 66.03 | 54.13 | 44.10 | 25.58 | 52.84 | ||||||||||||
1991 | 19.26 | 32.46 | 39.74 | 57.37 | 68.03 | 75.43 | 72.55 | 74.97 | 62.47 | 54.45 | 33.63 | 26.84 | 51.43 | |||||||||||||
1992 | 24.45 | 29.69 | 36.42 | 47.17 | 67.94 | 69.33 | 68.45 | 69.13 | 62.13 | 53.65 | 32.77 | 25.29 | 48.87 | |||||||||||||
1993 | 22.81 | 25.04 | 39.65 | 48.30 | 63.97 | 68.33 | 73.19 | 72.94 | 58.57 | 51.94 | 33.50 | 25.52 | 48.64 | |||||||||||||
1994 | 11.58 | 21.18 | 39.68 | 53.20 | 67.42 | 73.67 | 72.06 | 69.16 | 65.87 | 56.71 | 41.47 | 32.81 | 50.40 | |||||||||||||
1995 | 23.06 | 24.54 | 40.68 | 45.80 | 65.10 | 76.57 | 75.32 | 74.71 | 63.03 | 53.52 | 28.07 | 21.19 | 49.30 | |||||||||||||
1996 | 18.61 | 22.03 | 28.06 | 43.57 | 59.45 | 68.70 | 69.35 | 71.68 | 62.60 | 53.03 | 31.00 | 22.16 | 45.85 | |||||||||||||
1997 | 17.87 | 26.54 | 32.81 | 48.07 | 55.26 | 73.17 | 72.06 | 66.81 | 63.87 | 53.03 | 33.80 | 30.29 | 47.80 | |||||||||||||
1998 | 23.45 | 36.25 | 35.68 | 56.57 | 70.32 | 68.17 | 75.45 | 75.30 | a | 71.53 | 56.13 | 40.10 | 32.16 | 53.43 | ||||||||||||
1999 | 18.45 | 30.46 | 38.77 | 54.67 | 66.23 | 72.03 | 77.39 | 71.16 | 64.20 | 51.84 | 47.20 | 26.39 | 51.57 | |||||||||||||
2000 | 21.23 | 30.83 | 44.52 | 49.63 | 64.65 | 67.63 | 71.06 | 71.65 | 63.10 | 57.94 | 36.90 | 14.19 | 49.44 | |||||||||||||
2001 | 22.94 | 16.79 | 31.10 | 52.87 | 64.77 | 68.73 | 73.58 | 74.77 | 61.77 | 52.13 | 47.73 | 30.58 | 49.81 | |||||||||||||
2002 | 28.48 | 32.14 | 30.52 | 47.47 | 57.68 | 70.50 | 78.06 | 71.81 | 65.40 | 46.00 | 34.67 | 27.58 | 49.19 | |||||||||||||
2003 | 18.45 | 19.82 | 35.68 | 48.21 | a | 62.10 | 69.17 | 74.52 | 74.74 | 64.03 | 52.45 | 35.48 | a | 29.29 | 48.66 | |||||||||||
2004 | 14.23 | 27.83 | 36.84 | 50.43 | 59.48 | 67.70 | 71.65 | 67.13 | 69.10 | 53.48 | 41.23 | 24.42 | 48.63 | |||||||||||||
2005 | 18.42 | 30.29 | 33.81 | 56.57 | 59.32 | 75.07 | 76.32 | 72.87 | 69.50 | 55.61 | 37.73 | 22.13 | 50.64 | |||||||||||||
2006 | 28.97 | 22.39 | 36.68 | 56.87 | 62.13 | 71.50 | 77.77 | 72.42 | 61.33 | 48.23 | 39.37 | 28.84 | 50.54 | |||||||||||||
2007 | 23.68 | 17.04 | 39.48 | 49.47 | 66.42 | 72.77 | 73.23 | 73.45 | 67.50 | 58.77 | 35.67 | 23.19 | 50.06 | |||||||||||||
2008 | 21.32 | 21.24 | 32.77 | 48.50 | 61.32 | 69.07 | 74.35 | 72.58 | 64.93 | 51.35 | 36.76 | a | 19.23 | 47.79 | ||||||||||||
2009 | 14.32 | 26.29 | 35.45 | 48.60 | 62.10 | 68.73 | 69.16 | 70.06 | 68.63 | 45.74 | 45.33 | 21.84 | 48.02 | |||||||||||||
2010 | 22.19 | 27.71 | 46.94 | 59.70 | 66.23 | 67.67 | 75.03 | 74.68 | 60.63 | 58.00 | d | 38.70 | 22.16 | 51.64 | ||||||||||||
2011 | 16.81 | 24.50 | 34.00 | 46.00 | 60.74 | 68.77 | 76.87 | 73.29 | 61.93 | 56.61 | 39.90 | 28.65 | 49.01 | |||||||||||||
2012 | 25.03 | 31.28 | 51.03 | 53.37 | 67.42 | 72.53 | 78.45 | 71.71 | 63.53 | 51.39 | 38.50 | 28.52 | 52.73 | |||||||||||||
2013 | 22.45 | 22.07 | 30.84 | 41.67 | 64.23 | 68.57 | 73.00 | 71.45 | 65.40 | 52.16 | 34.43 | 16.77 | 46.92 | |||||||||||||
2014 | 11.23 | 15.71 | 27.52 | 43.67 | 62.35 | 71.03 | 70.13 | 69.97 | 62.67 | 50.39 | 28.10 | 26.03 | 44.90 | |||||||||||||
2015 | 17.35 | 12.86 | 36.19 | 51.57 | 65.29 | 68.90 | 74.00 | 69.84 | 69.57 | 53.61 | 45.67 | 36.32 | 50.10 | |||||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.03 | 26.56 | 36.81 | 52.30 | 65.98 | 73.26 | 77.28 | 74.95 | 66.36 | 55.27 | 38.63 | 26.14 | 50.88 | |||||||||||||
S.D. | 5.40 | 4.85 | 4.46 | 4.85 | 4.16 | 3.74 | 3.77 | 3.94 | 3.86 | 4.61 | 4.84 | 4.89 | 2.33 | |||||||||||||
SKEW | 0.31 | -0.25 | 0.53 | 0.16 | -0.02 | 0.44 | -0.09 | 0.51 | 0.61 | 0.48 | 0.41 | -0.19 | 0.49 | |||||||||||||
MAX | 35.27 | 37.50 | 51.03 | 64.44 | 75.65 | 85.66 | 84.87 | 86.00 | 76.57 | 69.00 | 52.70 | 38.84 | 58.90 | |||||||||||||
MIN | 11.23 | 12.86 | 27.52 | 41.67 | 55.26 | 65.63 | 68.45 | 66.81 | 58.57 | 45.74 | 28.07 | 14.19 | 44.90 | |||||||||||||
YRS | 79 | 80 | 78 | 83 | 82 | 83 | 83 | 83 | 82 | 85 | 78 | 80 | 67 |