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 | 32.23 | 15.28 | b | 23.75 | j | |
1928 | 16.67 | a | 16.98 | e | 24.50 | a | 35.11 | b | 56.35 | 59.08 | 67.42 | m | 65.42 | 53.00 | 47.32 | 33.15 | 25.54 | e | 39.37 | a | ||||||
1929 | 5.00 | d | 8.67 | a | 30.19 | 43.12 | 50.37 | a | 60.03 | 66.87 | 64.54 | g | 57.58 | 45.03 | a | 28.86 | a | 19.17 | a | 37.72 | a | |||||
1930 | 8.97 | b | 22.43 | a | 26.72 | b | 42.90 | a | 55.66 | 65.36 | a | 68.90 | b | 68.19 | 60.26 | a | 45.35 | 37.40 | a | 21.08 | a | 43.60 | ||||
1931 | 23.00 | e | 26.11 | 28.15 | 44.57 | b | 53.10 | a | 66.82 | 70.26 | d | 64.00 | f | 64.43 | 51.10 | a | 40.83 | d | 29.40 | 45.25 | a | |||||
1932 | 23.35 | e | 18.83 | 19.42 | 38.93 | 54.83 | a | 64.83 | 67.81 | 67.60 | 57.13 | 44.63 | 29.46 | b | 17.03 | b | 41.99 | |||||||||
1933 | 22.72 | b | 11.33 | a | 24.02 | a | 39.55 | 55.72 | a | 70.46 | d | 70.19 | 65.06 | 62.96 | b | 43.65 | 28.13 | 14.45 | a | 42.35 | ||||||
1934 | 22.25 | e | 9.43 | 22.50 | 38.82 | e | 58.77 | c | 66.02 | 68.32 | a | 62.66 | 56.12 | a | 49.28 | a | 36.96 | c | 18.12 | a | 42.44 | |||||
1935 | 11.59 | b | 19.52 | 30.59 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.73 | g | 32.15 | j | 19.48 | c | 20.29 | h | |
1936 | 8.37 | e | -3.59 | g | 33.07 | q | 34.21 | a | 56.53 | b | 57.40 | d | 69.72 | a | 63.26 | b | 58.43 | a | 40.57 | b | 27.00 | c | 19.70 | d | 43.52 | b |
1937 | 6.61 | c | 13.48 | a | 21.52 | 38.33 | a | 53.71 | c | 61.22 | 70.23 | c | 70.09 | b | 56.50 | 40.28 | a | 27.91 | a | 15.81 | 39.64 | |||||
1938 | 11.22 | a | 19.39 | a | 28.06 | g | 43.69 | f | 52.40 | a | 60.45 | a | 65.65 | 65.26 | h | 54.90 | a | 49.68 | 32.35 | 19.88 | f | 43.25 | d | |||
1939 | 20.56 | d | 10.71 | 24.81 | 36.90 | 55.90 | 62.88 | b | 66.53 | 63.61 | 58.16 | b | 43.35 | 32.53 | 25.77 | a | 41.81 | |||||||||
1940 | 8.55 | a | 18.26 | 17.98 | a | 34.98 | c | 48.48 | a | 61.37 | 65.76 | 62.74 | 57.78 | 46.44 | 28.03 | a | 20.10 | g | 40.94 | a | ||||||
1941 | 15.07 | b | 14.36 | 19.45 | b | 45.62 | a | 56.59 | b | 63.87 | 66.35 | 66.75 | g | ----- | z | 46.15 | a | 36.43 | h | 27.17 | a | 39.40 | c | |||
1942 | 17.25 | a | 19.80 | a | 33.71 | c | ----- | z | 51.06 | 59.64 | b | 63.37 | a | 62.78 | b | 54.22 | c | 48.89 | m | ----- | z | 13.52 | c | 41.71 | c | |
1943 | ----- | z | 8.39 | i | 13.55 | c | 34.98 | e | 49.00 | b | 63.41 | b | 67.33 | a | 63.85 | a | 51.22 | a | 44.90 | 26.58 | f | 20.20 | d | 45.38 | c | |
1944 | 25.10 | a | 19.11 | a | 23.59 | c | 37.35 | c | 55.94 | 63.92 | f | 65.09 | b | 66.33 | a | 56.88 | b | 47.41 | b | ----- | z | 16.79 | l | 44.09 | c | |
1945 | 7.58 | s | 16.03 | j | 42.14 | i | 42.02 | 50.55 | 49.00 | w | ----- | z | 63.30 | f | 56.09 | g | 44.31 | d | 33.50 | q | 11.15 | r | 45.63 | i | ||
1946 | 11.62 | o | 11.86 | q | 38.06 | o | 42.07 | b | 51.02 | d | 60.83 | 64.85 | n | 59.80 | c | 54.73 | d | 49.67 | v | ----- | z | ----- | z | 53.69 | g | |
1947 | ----- | z | ----- | z | ----- | z | 35.70 | e | 49.05 | i | 56.50 | i | 65.67 | a | 71.08 | 58.25 | j | 54.39 | d | 34.55 | s | 18.75 | i | 56.71 | h | |
1948 | 9.32 | i | 11.62 | l | 18.15 | u | 44.31 | c | 51.67 | b | 60.57 | a | 65.23 | e | 65.32 | 59.88 | 43.45 | c | 34.13 | g | 15.91 | c | 50.79 | d | ||
1949 | 17.91 | b | 14.34 | f | 23.55 | c | 43.65 | 54.05 | a | 65.80 | 67.33 | a | 65.47 | 53.18 | b | 49.71 | c | 30.67 | i | ----- | z | 48.96 | c | |||
1950 | ----- | z | ----- | z | 20.13 | h | 30.74 | k | 51.50 | d | 61.53 | ----- | z | ----- | z | 54.21 | k | ----- | z | ----- | z | ----- | z | 56.52 | j | |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.22 | l | 40.75 | a | 35.33 | d | 25.46 | f | 38.04 | j |
1953 | 16.38 | s | 16.77 | 28.14 | i | 36.81 | d | 53.34 | 63.23 | 66.82 | a | 66.48 | 57.88 | a | 49.95 | 37.31 | d | 20.83 | j | 49.84 | c | |||||
1954 | 11.97 | a | 24.07 | 21.98 | c | ----- | z | ----- | z | 66.89 | b | 65.89 | 61.85 | 53.80 | 43.97 | 33.85 | 18.82 | 40.31 | b | |||||||
1955 | 12.21 | 13.61 | 22.15 | 47.35 | 56.06 | 61.28 | 70.60 | 67.77 | 55.35 | 47.41 | c | 26.15 | 13.65 | 41.13 | ||||||||||||
1956 | 16.06 | 15.93 | 21.31 | 36.72 | a | ----- | z | 60.77 | h | 62.52 | c | 63.79 | 53.22 | 51.13 | 29.65 | 20.05 | 37.04 | b | ||||||||
1957 | 6.18 | a | 16.98 | 26.29 | 40.93 | 51.74 | b | 61.48 | 67.71 | 63.50 | 54.07 | 44.31 | b | 29.87 | 18.85 | 40.16 | ||||||||||
1958 | 17.34 | 13.64 | 26.48 | 41.28 | 51.00 | 56.28 | 63.73 | 63.34 | 56.75 | 46.81 | 32.13 | 9.74 | 39.88 | |||||||||||||
1959 | 7.35 | 11.23 | 24.37 | a | 40.43 | 56.03 | b | 62.93 | 65.66 | 68.10 | 57.27 | 40.47 | 21.37 | 24.50 | a | 39.98 | ||||||||||
1960 | 15.72 | a | 17.02 | 16.52 | 40.97 | a | 51.60 | 59.09 | b | 63.65 | a | 65.61 | 56.63 | 45.16 | 34.18 | 15.11 | 40.10 | |||||||||
1961 | 11.85 | 22.32 | 28.82 | 37.23 | 49.74 | 61.40 | 65.03 | 64.10 | a | 56.18 | 46.98 | 29.08 | 15.65 | 40.70 | ||||||||||||
1962 | 8.37 | a | 10.98 | 26.08 | 38.75 | 56.32 | 60.53 | 62.58 | a | 63.18 | 52.03 | 46.47 | 31.26 | a | 15.98 | 39.38 | ||||||||||
1963 | 3.05 | 7.52 | 27.44 | 42.40 | 50.16 | 63.37 | 66.63 | a | 61.95 | 55.83 | 54.71 | b | 35.68 | 11.47 | 40.02 | |||||||||||
1964 | 19.15 | 17.38 | 22.74 | 39.82 | 56.39 | 61.22 | 67.63 | a | 60.19 | 54.07 | 43.66 | 33.83 | 13.45 | a | 40.79 | |||||||||||
1965 | 9.65 | 11.46 | 19.92 | 37.31 | a | 56.52 | 59.22 | a | 63.23 | 62.50 | a | 51.33 | 46.18 | 30.43 | 23.95 | 39.31 | ||||||||||
1966 | 6.90 | a | 17.34 | 29.10 | 37.56 | c | 47.55 | a | 64.09 | a | 68.47 | 61.87 | 54.31 | a | 42.74 | 28.22 | 17.32 | 39.62 | ||||||||
1967 | 15.11 | 7.64 | 25.29 | 39.28 | 45.24 | 60.80 | 62.52 | 58.81 | 53.72 | a | 42.00 | 25.48 | 18.32 | 37.85 | ||||||||||||
1968 | 11.60 | 13.83 | 32.75 | a | 42.63 | 49.24 | b | 60.61 | b | 64.21 | 63.00 | 56.83 | a | 48.53 | 30.52 | 16.79 | 40.88 | |||||||||
1969 | 12.82 | a | 17.43 | 21.94 | 43.38 | 52.95 | 54.17 | 63.98 | a | 66.18 | 53.52 | 38.97 | a | 29.37 | 19.35 | a | 39.50 | |||||||||
1970 | 7.45 | 12.93 | 22.89 | 41.40 | 52.29 | 63.34 | a | 67.71 | 65.40 | 56.78 | 46.85 | 30.28 | 16.88 | a | 40.35 | |||||||||||
1971 | 6.82 | 15.16 | 22.39 | 39.69 | a | 49.79 | 64.40 | 63.32 | 61.05 | 57.98 | 52.26 | 30.88 | 19.52 | 40.27 | ||||||||||||
1972 | 5.68 | 10.69 | 22.06 | 35.24 | a | 56.18 | 59.66 | a | 64.40 | b | 64.10 | 54.18 | 40.73 | 28.77 | 13.26 | 37.91 | ||||||||||
1973 | 16.74 | 17.25 | 35.10 | 39.65 | 48.62 | b | 62.75 | 66.24 | 65.66 | 54.90 | a | 51.15 | a | 30.45 | 16.40 | 42.08 | ||||||||||
1974 | 12.37 | 14.05 | 26.92 | a | 42.78 | 49.56 | 57.97 | 67.15 | 61.83 | a | 49.95 | 44.71 | 32.10 | 22.89 | 40.19 | |||||||||||
1975 | 14.90 | 17.32 | 23.06 | 35.98 | a | 57.65 | 61.63 | 67.60 | 63.34 | 51.43 | 48.74 | 35.62 | 16.77 | 41.17 | ||||||||||||
1976 | 9.74 | 22.88 | 25.85 | 44.07 | 50.68 | a | 64.82 | 67.63 | 63.89 | d | 54.36 | a | 39.16 | 22.50 | 7.15 | 39.39 | ||||||||||
1977 | 1.97 | 16.48 | 33.16 | 45.90 | 60.68 | 59.38 | 67.37 | a | 58.84 | 54.27 | 43.87 | 29.75 | 14.31 | 40.50 | ||||||||||||
1978 | 9.24 | 10.21 | 24.26 | 37.58 | 55.39 | 59.93 | b | 62.35 | a | 63.39 | 58.33 | 43.66 | 28.91 | a | 12.57 | a | 38.82 | |||||||||
1979 | 4.44 | 8.41 | 27.11 | 37.10 | 49.56 | 59.80 | 64.52 | 60.73 | 56.12 | 41.05 | a | 28.08 | 22.06 | 38.25 | ||||||||||||
1980 | 11.77 | 12.70 | a | 23.52 | 43.55 | 55.94 | 59.07 | a | 65.08 | 63.10 | b | 53.27 | 39.63 | 31.54 | b | 15.02 | 39.51 | |||||||||
1981 | 13.05 | a | 20.48 | 30.71 | 43.53 | 51.06 | 61.07 | 64.00 | b | 63.19 | 52.66 | a | 41.13 | 34.32 | 18.06 | 41.11 | ||||||||||
1982 | 3.15 | 13.73 | 25.32 | 35.62 | a | 58.15 | 54.20 | 65.75 | a | 60.16 | 53.77 | 46.68 | 29.73 | 22.19 | 39.04 | |||||||||||
1983 | 17.19 | 24.73 | 28.65 | 37.76 | a | 47.79 | 60.82 | b | 69.13 | 67.31 | 57.91 | a | 44.35 | 31.83 | 7.34 | 41.23 | ||||||||||
1984 | 10.23 | 26.38 | 20.78 | a | 43.37 | 50.40 | a | 62.65 | 64.10 | 65.73 | 52.73 | 47.21 | 30.23 | 18.13 | 40.99 | |||||||||||
1985 | 10.65 | 14.95 | 31.90 | 44.13 | 55.61 | 57.78 | 62.95 | 60.90 | 55.23 | 44.95 | 25.77 | 8.15 | 39.41 | |||||||||||||
1986 | 14.24 | 15.57 | 29.52 | 46.22 | 54.66 | b | 59.45 | a | 66.43 | a | 59.76 | 55.18 | 44.37 | 26.57 | 20.98 | 41.08 | ||||||||||
1987 | 18.73 | 25.30 | 32.29 | 47.82 | 56.03 | 64.53 | 67.29 | 63.23 | a | 56.55 | a | 39.63 | 33.07 | 23.13 | 43.97 | |||||||||||
1988 | 10.78 | a | 11.69 | 27.05 | 42.25 | 56.95 | 64.45 | 67.94 | 66.55 | 56.07 | 39.15 | 31.37 | 16.23 | 40.87 | ||||||||||||
1989 | 20.29 | 9.68 | 23.34 | 38.98 | 52.15 | 59.21 | a | 66.45 | 63.69 | 55.25 | 47.34 | 25.48 | 6.58 | 39.04 | ||||||||||||
1990 | 23.13 | 19.63 | a | 30.76 | 45.58 | 50.39 | 61.95 | 63.97 | 63.08 | 56.98 | 44.03 | 35.23 | 17.50 | 42.69 | ||||||||||||
1991 | 10.47 | 21.91 | 29.58 | 45.62 | 57.87 | 64.57 | 64.00 | 65.21 | 53.75 | 44.10 | 26.28 | 18.95 | 41.86 | |||||||||||||
1992 | 17.65 | a | 21.81 | 26.39 | 38.35 | 54.65 | 57.97 | 59.42 | 59.45 | 54.00 | 44.08 | 27.45 | 19.11 | 40.03 | ||||||||||||
1993 | 14.31 | 14.88 | 28.00 | a | 37.75 | 52.48 | 58.33 | 64.39 | 64.42 | 49.73 | 42.24 | 26.88 | 19.34 | 39.40 | ||||||||||||
1994 | 2.63 | 12.00 | 30.10 | 41.25 | 53.77 | 62.93 | 63.48 | 60.74 | 57.73 | 47.90 | 34.12 | 25.97 | 41.05 | |||||||||||||
1995 | 16.42 | 15.41 | 30.79 | 35.58 | 52.76 | 65.40 | 66.08 | 67.74 | 53.52 | 45.84 | 21.25 | 13.60 | 40.37 | |||||||||||||
1996 | 8.34 | 11.10 | 18.23 | 33.76 | a | 47.98 | 59.68 | 60.02 | a | 62.73 | 54.57 | 42.98 | 24.20 | 15.98 | 36.63 | |||||||||||
1997 | 9.58 | 17.38 | 23.38 | a | 36.97 | 44.73 | 62.13 | 62.79 | 58.34 | 55.19 | a | 44.10 | 26.85 | 24.11 | 38.80 | |||||||||||
1998 | 16.95 | 28.96 | a | 26.60 | 43.97 | 57.21 | 58.87 | 64.52 | 65.20 | a | 59.47 | 46.39 | 33.50 | 22.89 | 43.71 | |||||||||||
1999 | 10.00 | 21.75 | 28.08 | 43.30 | 54.98 | 61.72 | 67.71 | 61.84 | 53.93 | 42.06 | 37.42 | 18.15 | 41.74 | |||||||||||||
2000 | 11.89 | 20.91 | 34.33 | a | 38.70 | 53.47 | 57.92 | 61.47 | 61.82 | 53.55 | 48.10 | 30.57 | 5.97 | 39.89 | ||||||||||||
2001 | 14.85 | 7.84 | 21.22 | a | 41.88 | 53.71 | 60.10 | 63.58 | 64.81 | 52.92 | 42.56 | 39.53 | 23.73 | 40.56 | ||||||||||||
2002 | 20.82 | a | 23.24 | a | 20.05 | b | 38.10 | a | 47.10 | 61.43 | a | 68.42 | 62.87 | 57.28 | 38.03 | 27.60 | 20.74 | 40.47 | ||||||||
2003 | 10.03 | 8.71 | 24.60 | 36.84 | a | 50.37 | 58.47 | 64.19 | 65.16 | 55.22 | 42.93 | a | 29.19 | a | 22.15 | 38.99 | ||||||||||
2004 | 5.34 | 18.48 | 28.44 | 39.38 | 48.40 | 57.65 | 61.92 | 57.79 | 59.15 | 44.60 | 33.47 | 15.94 | 39.21 | |||||||||||||
2005 | 9.50 | 21.09 | 23.05 | 43.97 | 49.19 | 64.78 | a | 65.68 | 62.73 | a | 58.87 | 46.61 | 29.87 | 16.23 | 40.96 | |||||||||||
2006 | 22.70 | a | 13.25 | 27.19 | 44.67 | 52.27 | 60.25 | 67.02 | a | 62.55 | 52.02 | 39.13 | 32.85 | 23.23 | 41.43 | |||||||||||
2007 | 16.24 | 8.16 | 29.47 | 38.63 | 54.27 | 62.03 | 63.74 | 63.82 | 57.62 | 49.82 | 28.87 | 15.61 | 40.69 | |||||||||||||
2008 | 13.08 | a | 10.71 | 21.12 | a | 38.87 | 48.92 | 60.00 | 64.45 | 61.63 | 55.90 | a | 42.95 | 29.73 | b | 9.97 | 38.11 | |||||||||
2009 | 4.47 | 17.00 | 24.76 | 38.47 | 50.66 | 59.13 | 59.79 | 60.65 | 58.23 | 39.05 | 37.57 | 15.15 | 38.74 | |||||||||||||
2010 | 15.37 | 18.88 | 35.05 | 46.95 | 54.85 | 59.57 | 66.50 | 65.98 | 51.73 | 47.26 | d | 31.55 | 16.05 | 42.48 | ||||||||||||
2011 | 9.73 | 15.29 | 23.63 | 36.53 | 50.50 | 59.13 | 67.89 | 63.73 | 52.93 | a | 47.37 | 33.02 | a | 21.06 | 40.07 | |||||||||||
2012 | 16.45 | 22.67 | 41.08 | 41.47 | 55.47 | 62.50 | 68.31 | 61.84 | 52.95 | 42.40 | 31.02 | 22.05 | 43.18 | |||||||||||||
2013 | 13.90 | 13.62 | 21.27 | 33.32 | 52.24 | 59.17 | 64.37 | 62.16 | 55.02 | 43.81 | 27.07 | 8.60 | 37.88 | |||||||||||||
2014 | 2.74 | 5.29 | 16.74 | 34.42 | 51.56 | 61.52 | 61.03 | 61.42 | 53.38 | 42.68 | 21.33 | 19.47 | 35.97 | |||||||||||||
2015 | 9.90 | 2.32 | 25.73 | 39.97 | 53.58 | 58.08 | 64.40 | 61.66 | 60.77 | 44.63 | 37.55 | 30.13 | 40.73 | |||||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.60 | 15.85 | 25.68 | 40.16 | 52.80 | 61.24 | 65.53 | 63.50 | 55.48 | 44.93 | 30.65 | 17.82 | 40.33 | |||||||||||||
S.D. | 5.66 | 5.42 | 4.87 | 3.62 | 3.30 | 2.85 | 2.49 | 2.63 | 2.73 | 3.59 | 4.13 | 5.13 | 1.58 | |||||||||||||
SKEW | 0.20 | 0.07 | 0.32 | 0.15 | -0.11 | 0.32 | -0.17 | 0.33 | 0.57 | 0.37 | 0.02 | -0.14 | -0.05 | |||||||||||||
MAX | 25.10 | 28.96 | 41.08 | 47.82 | 60.68 | 70.46 | 70.60 | 71.08 | 64.43 | 54.71 | 40.83 | 30.13 | 43.97 | |||||||||||||
MIN | 1.97 | 2.32 | 13.55 | 33.32 | 44.73 | 54.17 | 59.42 | 57.79 | 49.73 | 38.03 | 21.25 | 5.97 | 35.97 | |||||||||||||
YRS | 79 | 78 | 78 | 81 | 82 | 81 | 81 | 79 | 81 | 83 | 77 | 78 | 66 |