YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.20 | c | 45.21 | b | 14.08 | 12.04 | d | 32.13 | h | |
1936 | -9.47 | b | -13.15 | b | 25.31 | b | 36.74 | a | ----- | z | 66.22 | 78.47 | a | 68.27 | a | 59.62 | a | ----- | z | ----- | z | ----- | z | 39.00 | d | |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.18 | 33.65 | ----- | z | 37.41 | j | ||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.97 | o | 65.72 | d | ----- | z | ----- | z | ----- | z | ----- | z | 65.72 | k |
1941 | ----- | z | 6.15 | b | 18.35 | a | 42.86 | a | 56.94 | 63.40 | 70.27 | c | 68.97 | 53.36 | b | 43.29 | b | 27.27 | b | 20.39 | 42.84 | a | ||||
1942 | 16.23 | 11.87 | b | 29.86 | b | 43.36 | a | 50.08 | a | 60.57 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.33 | f | ||
1943 | -2.62 | a | 12.43 | 16.21 | 44.67 | 51.27 | 60.60 | 71.71 | 68.79 | 55.52 | a | 48.32 | 27.30 | 20.39 | 39.55 | |||||||||||
1944 | 20.10 | 9.36 | 15.18 | 40.77 | 58.50 | 62.67 | c | 68.05 | 66.24 | 55.98 | a | 48.06 | 25.35 | 13.71 | b | 40.33 | ||||||||||
1945 | 9.84 | 14.36 | 34.32 | 37.88 | 45.97 | a | 58.35 | 67.44 | 66.18 | 52.12 | 43.90 | a | 18.79 | a | 3.06 | e | 37.68 | |||||||||
1946 | 6.92 | a | 5.86 | c | 31.34 | 48.23 | b | 51.47 | 63.23 | 69.90 | a | 63.97 | 56.50 | b | 39.24 | 22.88 | 10.47 | a | 39.17 | |||||||
1947 | 13.69 | b | 6.28 | c | 20.44 | 39.93 | 49.47 | 59.70 | 71.10 | 71.13 | 54.75 | 50.28 | a | 19.80 | 7.60 | a | 38.68 | |||||||||
1948 | 6.03 | 4.85 | b | 14.39 | 35.97 | 54.12 | a | 62.26 | a | 68.87 | e | 69.02 | 64.32 | 46.61 | 27.96 | b | 8.97 | a | 38.61 | |||||||
1949 | 0.02 | -0.46 | 18.90 | 46.68 | 56.81 | 65.25 | 70.72 | a | 72.39 | 56.30 | 43.63 | 33.09 | a | 6.33 | d | 39.14 | ||||||||||
1950 | -14.57 | b | 4.62 | 17.52 | a | 32.67 | 49.32 | a | 62.40 | 66.56 | 64.27 | 57.82 | 45.69 | 19.12 | 5.64 | b | 34.25 | |||||||||
1951 | -0.34 | 8.46 | 11.22 | b | 39.50 | 57.34 | 58.91 | g | 68.50 | b | 63.32 | c | 52.65 | 41.52 | 20.32 | b | 5.26 | b | 33.43 | a | ||||||
1952 | 2.46 | d | 17.05 | a | 20.40 | a | 50.59 | c | 55.94 | 65.29 | f | 67.78 | a | 67.52 | 60.80 | b | 42.16 | c | 28.63 | g | 16.18 | 40.09 | b | |||
1953 | 10.05 | c | 16.41 | 23.94 | 36.13 | 53.15 | a | 62.87 | d | 66.98 | 69.66 | 55.96 | b | 50.87 | 33.90 | 17.39 | 41.44 | |||||||||
1954 | -5.79 | 27.61 | a | 23.10 | 38.32 | 49.21 | 62.71 | a | 69.94 | 64.89 | 53.48 | 43.18 | 33.92 | 22.03 | 40.22 | |||||||||||
1955 | 6.68 | a | 4.74 | a | 14.37 | 48.19 | a | 56.82 | a | 62.57 | 70.23 | 69.27 | a | 55.63 | 45.21 | 13.03 | 0.69 | e | 37.29 | |||||||
1956 | 1.37 | a | 4.31 | 16.40 | a | 33.32 | 53.03 | 68.13 | 66.13 | 66.31 | 53.17 | a | 47.82 | 27.20 | 13.40 | a | 37.55 | |||||||||
1957 | 0.79 | 9.32 | 25.84 | 40.02 | 54.95 | 60.27 | 72.83 | a | 65.76 | 53.52 | 43.48 | 27.98 | 19.98 | 39.56 | ||||||||||||
1958 | 14.89 | 7.46 | 27.21 | 43.95 | 56.77 | 59.22 | 64.97 | 66.94 | 57.15 | 45.94 | 26.05 | 7.39 | 39.83 | |||||||||||||
1959 | -0.68 | 4.27 | 31.56 | 40.72 | 50.92 | a | 65.22 | a | 69.87 | 70.37 | 55.42 | 36.85 | 19.25 | 21.60 | 38.78 | |||||||||||
1960 | 3.43 | a | 7.86 | 14.29 | 40.12 | 54.29 | 61.75 | 71.24 | 68.58 | 59.13 | 45.71 | 26.70 | 11.03 | 38.68 | ||||||||||||
1961 | 8.69 | 14.96 | 30.81 | 37.55 | a | 52.53 | 68.35 | 68.65 | 72.93 | a | 52.12 | b | 46.16 | 28.17 | 5.03 | 40.50 | ||||||||||
1962 | 4.63 | 3.31 | a | 19.06 | 41.12 | 51.55 | 64.25 | 65.71 | 67.90 | 54.27 | 47.11 | 32.64 | a | 14.77 | 38.86 | |||||||||||
1963 | 1.21 | 10.52 | 31.44 | 41.92 | 52.71 | ----- | z | 71.11 | 67.98 | 60.64 | a | 55.32 | 31.23 | 7.68 | 39.25 | a | ||||||||||
1964 | 11.42 | a | 16.95 | 17.37 | 44.35 | 56.44 | 62.03 | 70.16 | 62.89 | 53.53 | 45.10 | 24.95 | -0.11 | 38.76 | ||||||||||||
1965 | -1.73 | 7.84 | 14.52 | 40.52 | 52.95 | 62.87 | 66.42 | a | 66.03 | 46.29 | a | 46.81 | 23.68 | 18.87 | a | 37.09 | ||||||||||
1966 | -8.73 | 6.23 | 30.45 | 36.08 | 51.23 | 63.98 | 71.32 | 64.61 | 58.03 | 44.06 | 19.77 | 9.89 | 37.24 | |||||||||||||
1967 | 8.63 | 4.02 | 23.07 | a | 37.03 | 49.74 | 62.75 | 67.74 | 67.34 | 61.24 | c | 43.10 | 27.43 | 12.55 | 38.72 | |||||||||||
1968 | 4.03 | 8.60 | 31.82 | 41.88 | a | 49.79 | 61.35 | 67.18 | 63.50 | 56.63 | 44.06 | 28.97 | 7.50 | a | 38.78 | |||||||||||
1969 | -4.73 | 10.38 | 13.61 | 42.85 | 55.05 | 57.20 | 67.52 | b | 71.74 | 58.93 | 39.06 | 29.47 | 14.92 | 38.00 | ||||||||||||
1970 | -0.23 | a | 9.94 | a | 15.21 | 37.42 | 50.98 | 68.38 | 69.85 | 68.18 | 56.88 | 43.45 | 24.52 | 6.74 | 37.61 | |||||||||||
1971 | -3.98 | 11.82 | 22.50 | 41.73 | 54.84 | 65.70 | 65.11 | 67.37 | 54.82 | 43.50 | 24.90 | 8.52 | 38.07 | |||||||||||||
1972 | 0.21 | 3.74 | 19.85 | 37.43 | 56.73 | 64.55 | 63.21 | 67.10 | 50.38 | 38.43 | b | 23.58 | 3.10 | a | 35.69 | |||||||||||
1973 | 11.40 | b | 14.75 | 34.65 | 38.87 | 52.27 | 63.66 | a | 66.05 | 68.82 | 53.75 | 48.03 | a | 19.05 | 6.97 | 39.85 | ||||||||||
1974 | -2.31 | 5.50 | 15.40 | 37.67 | 48.23 | 63.02 | 71.85 | 63.10 | 51.93 | 45.13 | 27.02 | a | 18.20 | a | 37.06 | |||||||||||
1975 | 7.92 | 6.80 | 16.84 | 32.48 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.01 | h | ||||
1976 | 9.83 | h | 18.79 | a | 18.21 | 44.45 | 53.23 | 64.73 | 67.47 | 67.48 | 56.66 | a | 37.52 | 22.16 | a | 7.50 | a | 41.65 | a | |||||||
1977 | -5.15 | 17.89 | 30.08 | 42.75 | l | 65.85 | h | 63.60 | 67.27 | 59.00 | 54.60 | 45.61 | 24.82 | 2.92 | 36.07 | b | ||||||||||
1978 | -5.97 | a | 0.98 | b | 18.35 | a | 40.07 | a | 57.39 | 62.48 | 66.98 | 65.06 | 59.87 | 43.77 | 19.25 | 4.24 | 36.04 | |||||||||
1979 | -7.47 | b | -5.84 | 14.97 | a | 28.38 | 46.53 | 62.95 | 69.97 | 63.24 | 57.50 | 41.34 | 24.62 | 19.69 | 34.66 | |||||||||||
1980 | 2.53 | 7.62 | a | 15.03 | 46.53 | 58.79 | 61.92 | 68.19 | 61.21 | 53.47 | 41.81 | 31.98 | 11.89 | 38.41 | ||||||||||||
1981 | 11.18 | 16.80 | 30.79 | 43.12 | 51.85 | a | 60.50 | 67.85 | a | 68.63 | 55.05 | 41.63 | 34.33 | 8.79 | 40.88 | |||||||||||
1982 | -10.54 | g | 4.47 | i | 20.83 | e | 34.79 | f | 53.36 | i | 57.34 | k | 68.02 | c | 64.40 | j | 54.48 | g | 41.96 | g | 21.55 | h | 17.73 | c | 35.53 | i |
1983 | 16.09 | b | 19.22 | e | 24.97 | b | 36.65 | d | 48.00 | h | 61.40 | j | 71.60 | k | 70.86 | i | 55.40 | f | 41.63 | h | 29.32 | e | -3.36 | f | 25.25 | g |
1984 | 8.64 | f | 24.21 | c | 25.97 | l | 41.98 | b | 50.17 | h | 62.52 | b | 68.94 | f | 69.80 | i | 49.98 | h | 44.48 | g | 24.12 | i | 0.43 | i | 42.90 | i |
1985 | 6.61 | i | 6.78 | l | 29.50 | f | 43.50 | k | 54.79 | n | 55.94 | c | 66.16 | c | 60.19 | j | 50.26 | i | 41.78 | h | 8.16 | k | 4.48 | i | 61.05 | j |
1986 | 13.32 | f | ----- | z | 29.73 | k | 40.02 | h | 56.24 | j | 64.36 | h | 66.02 | e | 62.67 | j | 52.45 | h | 43.03 | l | 19.26 | i | 17.48 | g | 66.02 | k |
1987 | 17.75 | o | 21.25 | f | 23.35 | k | 48.57 | g | 55.68 | n | 66.91 | g | 68.22 | f | 62.92 | e | 56.71 | a | 38.95 | a | 32.71 | a | 19.92 | a | 42.24 | g |
1988 | 3.85 | a | 7.38 | a | 26.56 | 40.72 | 59.76 | 72.77 | 71.13 | 67.69 | 54.52 | a | 40.77 | a | 25.31 | a | 12.08 | 40.21 | ||||||||
1989 | 9.53 | -2.00 | 15.11 | 39.78 | 55.81 | 62.03 | 73.08 | 68.29 | 55.95 | a | 43.92 | 21.98 | 1.40 | 37.07 | ||||||||||||
1990 | 19.70 | a | 13.21 | 28.52 | 40.00 | 50.95 | 63.87 | 66.97 | 68.35 | 58.52 | 42.02 | 26.87 | 6.11 | 40.42 | ||||||||||||
1991 | 3.28 | a | 21.45 | 27.16 | 43.73 | 56.11 | 65.60 | 67.92 | 68.74 | 54.97 | 37.44 | 18.80 | 15.10 | a | 40.03 | |||||||||||
1992 | 14.55 | a | 17.75 | a | 30.18 | 36.68 | 56.02 | 61.29 | a | 61.52 | 62.26 | 52.32 | 42.34 | 24.22 | 5.39 | 38.71 | ||||||||||
1993 | 1.43 | a | 7.45 | 23.75 | a | 38.52 | b | 52.92 | 58.79 | b | 62.07 | a | 64.07 | a | 51.92 | 39.66 | 23.40 | 14.67 | a | 36.55 | ||||||
1994 | -6.08 | 0.29 | 28.24 | 39.50 | 55.39 | 63.52 | 64.38 | a | 63.69 | b | 59.57 | 46.86 | b | 29.21 | a | 14.68 | a | 38.27 | ||||||||
1995 | 5.57 | a | 10.82 | 20.63 | 35.05 | a | 51.18 | 66.57 | a | 67.03 | a | 67.33 | b | 55.32 | 42.56 | 19.48 | c | 9.38 | c | 37.58 | ||||||
1996 | -4.69 | b | 7.17 | 15.12 | a | 32.77 | d | 50.82 | 65.29 | a | 66.65 | a | 68.26 | 55.97 | ----- | z | ----- | z | ----- | z | 39.71 | c | ||||
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.95 | a | 23.75 | b | 23.82 | 29.84 | i | |
1998 | 6.53 | b | 24.45 | 20.10 | 46.20 | b | 56.14 | b | 60.41 | a | 68.10 | a | 69.42 | 59.75 | 44.40 | a | 26.03 | 12.55 | 41.17 | |||||||
1999 | 2.21 | c | 18.59 | 25.40 | b | 41.78 | a | 54.72 | a | 62.85 | d | 68.37 | 66.13 | 52.75 | 42.16 | 34.77 | 21.26 | 40.91 | ||||||||
2000 | 9.73 | 20.41 | 33.28 | a | 39.98 | 54.89 | 60.23 | 68.44 | 66.37 | 55.00 | a | 44.45 | 20.12 | -1.74 | 39.26 | |||||||||||
2001 | 12.78 | a | 2.07 | 22.53 | 41.23 | 56.26 | 61.98 | a | 68.98 | 68.37 | a | 56.58 | 40.24 | 35.35 | 14.40 | 40.07 | ||||||||||
2002 | 13.31 | 21.64 | 14.34 | b | 35.85 | 47.34 | 65.37 | c | 70.08 | 64.77 | 57.25 | 32.12 | b | 26.72 | a | 17.94 | 38.89 | |||||||||
2003 | 6.97 | 2.65 | a | 16.32 | c | 44.24 | a | 52.56 | 62.38 | 67.37 | 69.61 | 56.00 | 46.27 | 16.30 | 16.34 | 38.09 | ||||||||||
2004 | -2.02 | a | 12.72 | 24.55 | 40.53 | 47.95 | 59.25 | 66.26 | 58.63 | 57.63 | 42.82 | 32.10 | 15.15 | 37.96 | ||||||||||||
2005 | 2.15 | 14.27 | 24.85 | 45.47 | 51.15 | 64.07 | 67.92 | 64.18 | 58.35 | 44.03 | 28.45 | 16.42 | 40.11 | |||||||||||||
2006 | 23.71 | 7.27 | 23.81 | 48.05 | 55.37 | 65.73 | 71.55 | 66.95 | a | 54.27 | 38.10 | 24.97 | 17.88 | a | 41.47 | |||||||||||
2007 | 9.10 | a | ----- | z | 27.77 | a | 40.33 | 54.47 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.92 | h | ||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 4.31 | 9.88 | 22.35 | 40.34 | 53.26 | 62.97 | 68.35 | 66.63 | 55.84 | 43.50 | 25.67 | 11.73 | 38.68 | |||||||||||||
S.D. | 8.01 | 7.58 | 6.38 | 4.32 | 3.24 | 2.88 | 2.76 | 2.96 | 3.00 | 3.78 | 5.33 | 6.37 | 1.63 | |||||||||||||
SKEW | 0.12 | -0.08 | 0.22 | -0.08 | -0.22 | 0.47 | 0.46 | -0.43 | -0.06 | 0.02 | -0.14 | -0.09 | -0.53 | |||||||||||||
MAX | 23.71 | 27.61 | 34.65 | 50.59 | 59.76 | 72.77 | 78.47 | 72.93 | 64.32 | 55.32 | 35.35 | 23.82 | 41.47 | |||||||||||||
MIN | -14.57 | -13.15 | 11.22 | 28.38 | 45.97 | 55.94 | 61.52 | 58.63 | 46.29 | 32.12 | 13.03 | -1.74 | 34.25 | |||||||||||||
YRS | 60 | 62 | 63 | 62 | 58 | 58 | 61 | 60 | 60 | 60 | 60 | 60 | 50 |