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 | 37.66 | b | 22.43 | 2.63 | a | 20.91 | i | |
1928 | 6.83 | a | 4.83 | e | 11.97 | a | 21.79 | b | 41.84 | 46.23 | 55.61 | m | 54.19 | 42.40 | 37.84 | 25.47 | 14.93 | a | 28.03 | a | ||||||
1929 | -7.67 | a | -4.61 | 19.68 | 31.37 | 37.13 | a | 47.20 | 54.00 | 51.75 | g | 45.50 | 32.87 | a | 18.66 | a | 10.97 | a | 25.92 | a | ||||||
1930 | -1.52 | b | 11.15 | a | 15.07 | b | 28.59 | a | 43.03 | 52.62 | a | 55.31 | b | 52.42 | 45.79 | a | 35.58 | 26.28 | a | 10.77 | a | 31.26 | ||||
1931 | 13.23 | e | 14.71 | 18.13 | 29.36 | b | 37.83 | a | 53.53 | 56.79 | c | 51.16 | f | 52.40 | 39.67 | a | 29.69 | d | 19.97 | 33.21 | a | |||||
1932 | 13.04 | e | 6.17 | 7.87 | 25.23 | 40.35 | 50.57 | 53.71 | 53.55 | 43.43 | 33.10 | 18.17 | a | 6.87 | a | 29.34 | ||||||||||
1933 | 9.23 | a | 0.37 | a | 13.52 | 27.40 | 42.03 | a | 55.81 | c | 55.77 | 49.90 | 48.93 | b | 32.06 | 17.47 | 3.67 | a | 29.68 | |||||||
1934 | 10.97 | b | -4.07 | 9.77 | 27.56 | e | 42.00 | c | 51.77 | 54.77 | a | 48.52 | 43.70 | 37.33 | a | 25.78 | c | 5.80 | a | 29.49 | ||||||
1935 | -1.21 | b | 6.04 | 17.39 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.50 | g | 20.38 | i | 11.53 | a | 8.44 | h | |
1936 | -1.93 | b | -18.12 | e | 23.25 | o | 23.90 | 40.37 | a | 42.13 | 54.94 | 49.52 | b | 42.87 | 27.48 | b | 17.90 | a | 10.07 | d | 26.28 | a | ||||
1937 | -7.70 | a | -0.11 | a | 6.94 | 27.52 | a | 38.86 | b | 48.17 | 55.75 | c | 54.07 | b | 42.23 | 30.81 | 19.97 | 7.10 | 26.97 | |||||||
1938 | 1.32 | 9.78 | a | 17.48 | f | 30.50 | f | 40.00 | a | 47.20 | 53.26 | 51.61 | h | 43.10 | 36.26 | 23.80 | 9.92 | e | 29.40 | c | ||||||
1939 | 10.78 | d | -3.75 | 9.65 | 22.47 | 40.06 | 50.47 | 51.45 | 49.00 | 43.72 | a | 32.26 | 20.67 | 16.74 | 28.63 | |||||||||||
1940 | -1.43 | a | 7.72 | 6.67 | a | 22.26 | c | 34.39 | 48.63 | 51.39 | 52.00 | 44.37 | 35.55 | 19.55 | a | 8.32 | f | 29.19 | a | |||||||
1941 | 5.28 | b | 1.39 | 4.23 | a | 30.24 | a | 42.21 | b | 50.03 | 52.23 | 56.04 | g | ----- | z | 35.67 | a | 27.04 | f | 19.43 | a | 26.75 | c | |||
1942 | 9.06 | 9.26 | a | 22.76 | b | ----- | z | 37.42 | 45.93 | a | 49.77 | a | 49.83 | b | 41.40 | 30.68 | l | ----- | z | 4.71 | c | 30.02 | c | |||
1943 | ----- | z | -7.16 | i | -1.79 | c | 23.84 | e | 37.17 | a | 52.61 | b | 53.03 | 50.53 | a | 38.38 | a | 33.13 | 18.28 | e | 9.70 | d | 31.49 | b | ||
1944 | 15.10 | a | 8.57 | a | 13.38 | b | 21.67 | c | 40.94 | 49.12 | f | 49.86 | b | 51.00 | a | 44.54 | b | 33.31 | b | ----- | z | 6.47 | l | 30.93 | c | |
1945 | 0.62 | r | 2.80 | h | 30.78 | h | 30.27 | 39.48 | 40.43 | w | ----- | z | 47.31 | e | 42.79 | f | 32.19 | d | 23.38 | q | 1.24 | n | 37.31 | h | ||
1946 | 2.41 | i | -3.74 | i | 24.04 | g | 27.75 | b | 35.81 | 46.93 | 51.12 | n | 44.36 | c | 39.36 | b | 37.55 | t | ----- | z | ----- | z | 38.84 | g | ||
1947 | ----- | z | ----- | z | ----- | z | 25.81 | d | 38.75 | g | 43.10 | i | 50.40 | a | 56.35 | 44.78 | c | 40.14 | b | 24.64 | s | 10.83 | h | 43.50 | g | |
1948 | -3.53 | a | -2.44 | k | 0.44 | o | 30.19 | c | 34.94 | 45.93 | a | 51.07 | c | 52.13 | 43.27 | 30.73 | a | 26.54 | f | 6.79 | b | 32.39 | c | |||
1949 | 9.10 | b | 1.25 | d | 14.32 | c | 28.93 | 37.23 | 50.57 | 54.47 | a | 50.58 | 40.17 | a | 35.86 | c | 21.62 | i | ----- | z | 32.25 | b | ||||
1950 | ----- | z | ----- | z | 8.83 | g | 22.37 | k | 35.59 | d | 46.23 | ----- | z | ----- | z | 42.70 | ----- | z | ----- | z | ----- | z | 41.51 | i | ||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.20 | j | 28.20 | a | 25.26 | c | 19.76 | f | 26.73 | j |
1953 | 7.75 | s | 6.04 | 17.00 | i | 26.46 | d | 38.45 | 50.00 | 53.70 | a | 55.13 | 44.86 | a | 34.90 | 26.30 | c | 13.50 | e | 34.93 | b | |||||
1954 | 2.17 | a | 15.75 | 11.00 | a | ----- | z | ----- | z | 53.75 | b | 52.06 | 47.94 | 43.37 | 34.23 | 26.00 | 9.42 | 29.57 | b | |||||||
1955 | 2.06 | 2.18 | 10.29 | 34.77 | 41.10 | 47.97 | 56.42 | 54.23 | 42.33 | 38.04 | c | 18.57 | 5.10 | 29.42 | ||||||||||||
1956 | 5.10 | 4.14 | 8.39 | 26.40 | ----- | z | 48.68 | h | 51.07 | c | 52.58 | 41.73 | 38.81 | 21.93 | 10.81 | 26.10 | b | |||||||||
1957 | -4.27 | a | 4.93 | 13.97 | 28.57 | 38.20 | a | 49.40 | 54.29 | 50.35 | 41.43 | 32.43 | a | 23.03 | 9.65 | 28.50 | ||||||||||
1958 | 8.84 | 3.79 | 15.23 | 28.10 | 35.65 | 42.57 | 50.97 | 50.23 | 45.47 | 37.26 | 23.33 | -0.77 | 28.39 | |||||||||||||
1959 | -2.97 | -1.96 | 11.90 | a | 29.20 | 42.27 | a | 49.73 | 52.52 | 57.61 | 45.50 | 32.55 | 12.23 | 16.27 | a | 28.74 | ||||||||||
1960 | 6.70 | a | 6.48 | 1.32 | 29.90 | a | 39.55 | 45.34 | a | 49.80 | a | 53.68 | 45.60 | 34.68 | 25.57 | 5.65 | 28.69 | |||||||||
1961 | 1.45 | 10.71 | 18.03 | 26.43 | 34.48 | 47.53 | 52.42 | 50.97 | a | 46.00 | 35.65 | 19.60 | 6.84 | 29.18 | ||||||||||||
1962 | -1.57 | a | -0.46 | 14.77 | 26.93 | 44.74 | 47.70 | 49.87 | a | 49.90 | 41.27 | 36.06 | 23.93 | a | 7.52 | 28.39 | ||||||||||
1963 | -5.68 | -4.29 | 15.06 | 27.90 | 36.58 | 48.97 | 52.67 | a | 49.26 | 43.43 | 41.87 | a | 27.10 | 2.06 | 27.91 | |||||||||||
1964 | 8.61 | 4.52 | 11.19 | 26.63 | 42.84 | 46.90 | 54.57 | a | 49.42 | 43.83 | 32.29 | 24.27 | 4.17 | a | 29.10 | |||||||||||
1965 | -1.45 | -1.54 | 8.29 | 26.55 | a | 42.48 | 45.10 | a | 49.87 | 49.90 | a | 41.43 | 35.26 | 22.50 | 17.87 | 28.02 | ||||||||||
1966 | -5.74 | 7.75 | 18.84 | 26.22 | c | 34.39 | 49.53 | 54.58 | 50.48 | 41.07 | a | 30.97 | 20.53 | 8.65 | 28.11 | |||||||||||
1967 | 4.84 | -4.89 | 12.87 | 25.90 | 29.39 | 48.17 | 48.97 | 44.97 | 39.21 | a | 31.39 | 17.00 | 9.16 | 25.58 | ||||||||||||
1968 | 1.61 | 1.72 | 19.60 | a | 29.53 | 35.80 | a | 48.79 | a | 52.03 | 50.06 | 46.97 | a | 37.55 | 22.80 | 8.16 | 29.55 | |||||||||
1969 | 4.29 | 4.04 | 7.00 | 30.77 | 38.81 | 42.70 | 50.63 | a | 50.42 | 40.80 | 30.27 | a | 19.70 | 10.40 | a | 27.48 | ||||||||||
1970 | -4.39 | -1.14 | 9.65 | 29.57 | 40.65 | 50.41 | a | 55.06 | 51.48 | 46.23 | 36.87 | 23.17 | 7.17 | a | 28.73 | |||||||||||
1971 | -4.13 | 3.54 | 9.81 | 26.07 | a | 35.39 | 50.93 | 51.19 | 47.29 | 48.03 | 43.55 | 23.50 | 10.65 | 28.82 | ||||||||||||
1972 | -8.71 | -2.48 | 9.58 | 22.86 | a | 41.16 | 45.86 | a | 53.03 | b | 52.84 | 42.43 | 30.68 | 22.80 | 5.29 | 26.28 | ||||||||||
1973 | 6.81 | 7.04 | 25.84 | 29.07 | 37.83 | b | 51.57 | 54.61 | 56.16 | 45.59 | a | 40.90 | 24.20 | 9.13 | 32.39 | |||||||||||
1974 | 3.77 | 2.18 | 17.53 | a | 30.70 | 36.84 | 45.60 | 55.74 | 51.47 | a | 39.57 | 35.29 | 24.97 | 15.71 | 29.95 | |||||||||||
1975 | 6.03 | 7.79 | 12.32 | 24.14 | a | 43.97 | 51.27 | 56.39 | 52.52 | 41.87 | 36.74 | 26.43 | 8.16 | 30.63 | ||||||||||||
1976 | -0.03 | 12.90 | 16.32 | 31.30 | 36.27 | a | 51.77 | 55.42 | 51.17 | b | 40.38 | a | 27.97 | 13.50 | -2.90 | 27.84 | ||||||||||
1977 | -8.39 | 5.54 | 23.16 | 31.80 | 45.71 | 46.87 | 55.20 | a | 47.16 | 45.43 | 31.52 | 21.27 | 6.03 | 29.27 | ||||||||||||
1978 | -0.77 | -2.43 | 10.94 | 25.50 | 40.26 | 46.45 | a | 51.57 | a | 52.39 | 49.37 | 34.65 | 19.28 | a | 3.73 | a | 27.58 | |||||||||
1979 | -3.84 | -3.11 | 17.87 | 26.80 | 37.13 | 47.50 | 52.32 | 50.65 | 44.97 | 32.63 | a | 20.83 | 13.39 | 28.10 | ||||||||||||
1980 | 2.29 | 1.62 | 12.16 | 30.87 | 40.74 | 45.86 | a | 52.97 | 53.00 | a | 42.30 | 30.10 | 24.76 | a | 7.32 | 28.67 | ||||||||||
1981 | 4.13 | 12.36 | 20.55 | 32.03 | 37.35 | 51.33 | 53.76 | b | 54.23 | 43.03 | a | 32.65 | 26.47 | 11.10 | 31.58 | |||||||||||
1982 | -7.48 | 3.36 | 16.39 | 24.00 | a | 46.10 | 41.97 | 55.97 | 50.97 | 46.20 | 37.84 | 22.73 | 15.87 | 29.49 | ||||||||||||
1983 | 10.26 | 17.96 | 20.97 | 27.63 | 35.61 | 48.93 | 59.13 | 57.55 | 49.03 | 35.65 | 25.87 | -0.45 | 32.35 | |||||||||||||
1984 | 1.23 | 18.93 | 10.03 | a | 31.87 | 37.58 | 52.20 | 53.71 | 56.81 | 43.40 | 39.23 | 22.37 | 10.19 | 31.46 | ||||||||||||
1985 | 2.13 | 6.14 | 22.39 | 32.70 | 43.39 | 46.73 | 52.19 | 52.03 | 46.70 | 35.06 | 19.03 | 0.39 | 29.91 | |||||||||||||
1986 | 4.97 | 6.50 | 19.48 | 34.03 | 41.21 | b | 47.76 | a | 57.00 | 50.13 | 47.10 | 35.03 | 19.20 | 14.74 | 31.43 | |||||||||||
1987 | 11.10 | 15.82 | 20.77 | 33.43 | 43.00 | 53.03 | 57.45 | 53.71 | 46.34 | a | 30.39 | 26.17 | 17.68 | 34.07 | ||||||||||||
1988 | 1.65 | 1.07 | 17.52 | 28.50 | 41.45 | 50.63 | 56.23 | 57.03 | 47.10 | 30.74 | 26.33 | 7.68 | 30.49 | |||||||||||||
1989 | 11.68 | -1.64 | 13.10 | 27.23 | 38.74 | 47.90 | a | 55.00 | 53.74 | 44.33 | 36.74 | 18.17 | -2.10 | 28.57 | ||||||||||||
1990 | 14.65 | 9.04 | 19.39 | 33.07 | 37.84 | 50.97 | 53.65 | 54.00 | 47.93 | 33.94 | 26.37 | 9.42 | 32.52 | |||||||||||||
1991 | 1.68 | 11.36 | 19.42 | 33.87 | 47.71 | 53.70 | 55.45 | 55.45 | 45.03 | 33.74 | 18.93 | 11.06 | 32.28 | |||||||||||||
1992 | 11.03 | a | 13.93 | 16.35 | 29.53 | 41.35 | 46.60 | 50.39 | 49.77 | 45.87 | 34.52 | 22.13 | 12.94 | 31.20 | ||||||||||||
1993 | 5.81 | 4.71 | 16.67 | a | 27.20 | 41.00 | 48.33 | 55.58 | 55.90 | 40.90 | 32.55 | 20.27 | 13.16 | 30.17 | ||||||||||||
1994 | -6.32 | 2.82 | 20.52 | 29.30 | 40.13 | 52.20 | 54.90 | 52.32 | 49.60 | 39.10 | 26.77 | 19.13 | 31.71 | |||||||||||||
1995 | 9.77 | 6.29 | 20.90 | 25.37 | 40.42 | 54.23 | 56.84 | 60.77 | 44.00 | 38.16 | 14.43 | 6.00 | 31.43 | |||||||||||||
1996 | -1.94 | 0.17 | 8.39 | 23.69 | a | 36.52 | 50.67 | 50.57 | a | 53.77 | 46.53 | 32.94 | 17.40 | 9.81 | 27.38 | |||||||||||
1997 | 1.29 | 8.21 | 13.87 | a | 25.87 | 34.19 | 51.10 | 53.52 | 49.87 | 46.45 | a | 35.16 | 19.90 | 17.94 | 29.78 | |||||||||||
1998 | 10.45 | 21.67 | a | 17.52 | 31.37 | 44.10 | 49.57 | 53.58 | 55.23 | 47.40 | 36.65 | 26.90 | 13.61 | 34.00 | ||||||||||||
1999 | 1.55 | 13.04 | 17.39 | 31.93 | 43.74 | 51.40 | 58.03 | 52.52 | 43.67 | 32.29 | 27.63 | 9.90 | 31.92 | |||||||||||||
2000 | 2.55 | 11.00 | 24.50 | a | 27.77 | 42.29 | 48.20 | 51.87 | 52.00 | 44.00 | 38.26 | 24.23 | -2.26 | 30.37 | ||||||||||||
2001 | 6.77 | -1.11 | 11.87 | a | 30.90 | 42.65 | 51.47 | 53.58 | 54.84 | 44.07 | 33.00 | 31.33 | 16.87 | 31.35 | ||||||||||||
2002 | 13.10 | a | 14.00 | a | 8.86 | b | 28.34 | a | 36.52 | 51.69 | a | 58.77 | 53.94 | 49.17 | 30.06 | 20.53 | 13.90 | 31.57 | ||||||||
2003 | 1.61 | -2.39 | 13.52 | 25.48 | a | 38.65 | 47.77 | 53.87 | 55.58 | 46.40 | 33.67 | a | 22.80 | 15.00 | 29.33 | |||||||||||
2004 | -3.55 | 9.14 | 20.03 | 28.33 | 37.32 | 47.60 | 52.19 | 48.45 | 49.20 | 35.71 | 25.70 | 7.45 | 29.80 | |||||||||||||
2005 | 0.58 | 11.89 | 12.29 | 31.37 | 39.06 | 54.45 | a | 55.03 | 52.80 | a | 48.23 | 37.61 | 22.00 | 10.32 | 31.30 | |||||||||||
2006 | 16.50 | a | 4.11 | 17.71 | 32.47 | 42.42 | 49.00 | 56.37 | a | 52.68 | 42.70 | 30.03 | 26.33 | 17.61 | 32.33 | |||||||||||
2007 | 8.81 | -0.71 | 19.45 | 27.80 | 42.13 | 51.30 | 54.26 | 54.19 | 47.73 | 40.87 | 22.07 | 8.03 | 31.33 | |||||||||||||
2008 | 5.30 | a | 0.17 | 9.60 | a | 29.23 | 36.52 | 50.93 | 54.55 | 50.68 | 47.00 | a | 34.55 | 22.45 | a | 0.71 | 28.47 | |||||||||
2009 | -5.39 | 7.71 | 14.06 | 28.33 | 39.23 | 49.53 | 50.42 | 51.23 | 47.83 | 32.35 | 29.80 | 8.45 | 29.46 | |||||||||||||
2010 | 8.55 | 10.04 | 23.16 | 34.20 | 43.48 | 51.47 | 57.97 | 57.29 | 42.83 | 36.52 | d | 24.40 | 9.94 | 33.32 | ||||||||||||
2011 | 2.65 | 6.07 | 13.26 | 27.07 | 40.26 | 49.50 | 58.90 | 54.16 | 43.86 | a | 38.13 | 26.62 | a | 13.48 | 31.16 | |||||||||||
2012 | 7.87 | 14.07 | 31.13 | 29.57 | 43.52 | 52.47 | 58.16 | 51.97 | 42.37 | 33.42 | 23.53 | 15.58 | 33.64 | |||||||||||||
2013 | 5.35 | 5.18 | 11.71 | 24.97 | 40.26 | 49.77 | 55.74 | 52.87 | 44.63 | 35.45 | 19.70 | 0.42 | 28.84 | |||||||||||||
2014 | -5.74 | -5.14 | 5.97 | 25.17 | 40.77 | 52.00 | 51.94 | 52.87 | 44.10 | 34.97 | 14.57 | 12.90 | 27.03 | |||||||||||||
2015 | 2.45 | -8.21 | 15.26 | 28.37 | 41.87 | 47.27 | 54.81 | 53.48 | 51.97 | 35.65 | 29.43 | 23.94 | 31.36 | |||||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 3.08 | 4.86 | 14.57 | 28.24 | 39.61 | 49.19 | 53.82 | 52.17 | 44.58 | 34.71 | 22.58 | 9.63 | 29.90 | |||||||||||||
S.D. | 6.31 | 6.84 | 5.74 | 3.08 | 3.24 | 2.91 | 2.45 | 2.93 | 2.88 | 3.25 | 3.90 | 5.65 | 1.89 | |||||||||||||
SKEW | 0.04 | -0.16 | -0.03 | -0.02 | -0.18 | -0.28 | 0.10 | 0.06 | 0.29 | 0.17 | -0.29 | -0.08 | 0.19 | |||||||||||||
MAX | 16.50 | 21.67 | 31.13 | 34.77 | 47.71 | 55.81 | 59.13 | 60.77 | 52.40 | 43.55 | 31.33 | 23.94 | 34.07 | |||||||||||||
MIN | -8.71 | -18.13 | -1.79 | 21.67 | 29.39 | 41.97 | 48.97 | 44.36 | 38.38 | 27.48 | 12.23 | -2.90 | 25.58 | |||||||||||||
YRS | 80 | 80 | 78 | 81 | 82 | 81 | 81 | 80 | 83 | 84 | 78 | 80 | 66 |