YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.19 | n | 31.61 | 17.38 | a | 2.76 | b | 17.25 | i | |
1927 | -13.44 | d | 2.48 | c | 11.52 | 28.83 | a | 33.56 | d | 45.03 | 46.87 | a | 44.23 | 47.63 | 38.77 | 13.90 | -4.63 | a | 24.56 | |||||||
1928 | -10.47 | a | -7.36 | a | 7.35 | 26.54 | b | 35.52 | 38.21 | b | 53.17 | a | 51.43 | a | 39.13 | 32.97 | a | 21.77 | 11.83 | b | 25.01 | |||||
1929 | -21.13 | ----- | z | ----- | z | 28.97 | 39.13 | a | 43.58 | d | 53.13 | 46.10 | a | 40.93 | 32.19 | 16.30 | 2.07 | a | 28.13 | b | ||||||
1930 | -16.27 | a | 9.15 | b | 11.47 | a | 25.59 | a | 37.83 | b | 53.69 | a | 56.80 | a | 48.38 | b | 40.97 | 33.29 | c | 23.80 | 8.55 | 27.77 | ||||
1931 | 7.87 | 10.82 | 12.20 | a | 32.41 | a | 41.33 | a | 53.80 | 59.58 | 52.10 | 51.52 | a | 40.77 | 30.33 | 19.55 | b | 34.36 | ||||||||
1932 | 12.60 | a | 5.07 | b | 8.76 | b | 30.32 | h | 39.61 | 49.10 | 57.52 | 57.29 | 41.43 | 33.06 | 17.14 | b | 0.52 | 29.28 | a | |||||||
1933 | 9.52 | -1.82 | 15.42 | 26.63 | 40.84 | 57.57 | b | 59.37 | a | ----- | z | 44.95 | h | 31.48 | 19.53 | 1.04 | c | 25.96 | b | |||||||
1934 | 9.10 | -1.43 | 11.91 | h | 28.93 | b | ----- | z | 49.41 | m | 51.16 | 45.81 | 43.80 | 35.84 | 25.00 | a | 3.81 | 26.89 | c | |||||||
1935 | -1.35 | 7.82 | 19.33 | a | 25.17 | a | 32.90 | 44.78 | c | 59.28 | b | 54.00 | 41.52 | a | 32.69 | b | 18.54 | b | 10.07 | c | 28.73 | |||||
1936 | 6.22 | m | -12.79 | 16.30 | a | 22.73 | 40.45 | 42.79 | a | 57.10 | k | 50.81 | e | 46.40 | 29.61 | 17.21 | b | 11.93 | b | 26.55 | b | |||||
1937 | -5.03 | a | 3.41 | a | 6.90 | 27.17 | ----- | z | 46.90 | a | 55.65 | n | 55.45 | 44.80 | 29.03 | 20.00 | 4.70 | a | 23.33 | b | ||||||
1938 | 1.43 | a | 6.93 | a | 17.93 | a | 28.97 | a | 39.30 | a | 48.83 | 54.81 | 51.35 | n | 43.60 | 36.61 | 21.23 | 6.67 | a | 27.85 | a | |||||
1939 | 8.65 | -3.65 | b | 11.55 | 23.14 | a | 40.70 | a | 52.34 | a | 54.29 | j | 52.52 | f | 44.89 | b | 30.45 | i | 21.13 | 19.03 | 24.20 | c | ||||
1940 | -1.52 | 7.11 | a | 6.13 | 27.31 | a | 36.23 | a | 47.27 | 54.45 | 53.81 | 48.53 | 37.48 | 20.87 | 12.71 | 29.20 | ||||||||||
1941 | 7.30 | a | 5.22 | a | 11.87 | 36.10 | 44.19 | 49.90 | 55.48 | 52.10 | a | 49.00 | a | 36.57 | a | 26.53 | 17.21 | c | 32.62 | |||||||
1942 | 7.45 | b | 5.33 | a | 20.90 | b | 34.00 | e | 36.63 | a | 49.09 | g | 49.41 | n | 48.26 | h | 30.89 | u | 31.41 | i | 25.91 | h | 4.00 | c | 18.05 | f |
1943 | -2.44 | f | 0.85 | b | 0.17 | g | 23.27 | h | 36.85 | k | 52.30 | t | 51.76 | b | 54.00 | d | 41.17 | a | 33.53 | a | 20.00 | e | 8.52 | 29.98 | e | |
1944 | 14.23 | 4.14 | 12.77 | 23.83 | 40.97 | 48.47 | 52.83 | a | 51.90 | 43.23 | 32.68 | 29.39 | b | 4.97 | a | 29.95 | ||||||||||
1945 | -2.07 | a | 2.36 | c | 21.42 | 26.13 | 31.19 | 42.59 | a | 50.23 | 48.52 | 40.23 | 28.87 | a | 17.64 | b | 3.21 | c | 25.86 | |||||||
1946 | 3.18 | c | -2.93 | a | 23.10 | 26.90 | 33.68 | 43.93 | 50.26 | 45.55 | 39.62 | a | 32.52 | 20.07 | b | 4.45 | b | 26.69 | ||||||||
1947 | 3.90 | -2.63 | a | 7.32 | i | 24.03 | 30.97 | b | 39.78 | g | 48.71 | 52.73 | a | 41.00 | 37.30 | a | 13.17 | a | 4.74 | 25.39 | b | |||||
1948 | -9.74 | -6.04 | c | 4.68 | 28.33 | 30.45 | b | 43.77 | 49.57 | a | 47.68 | 38.57 | 32.45 | 25.97 | 7.19 | 24.41 | ||||||||||
1949 | 7.58 | 1.61 | ----- | z | ----- | z | 39.84 | 51.93 | 55.13 | 50.21 | g | 42.80 | 35.87 | 21.43 | 6.32 | 29.17 | c | |||||||||
1950 | -7.00 | 0.96 | 3.94 | 19.40 | 36.06 | 47.77 | 50.32 | 45.23 | 41.37 | 37.10 | 16.03 | 0.03 | 24.27 | |||||||||||||
1951 | -0.97 | a | 3.26 | a | 10.40 | a | 27.17 | 41.48 | 46.03 | 52.45 | 49.90 | 41.40 | 35.06 | 13.03 | 5.45 | 27.06 | ||||||||||
1952 | 1.48 | 8.38 | 10.68 | 30.23 | 37.65 | 51.47 | 55.58 | 50.61 | 45.83 | 26.39 | 22.27 | 15.58 | 29.68 | |||||||||||||
1953 | 5.87 | 1.82 | 15.86 | c | 26.17 | 35.74 | ----- | z | ----- | z | ----- | z | ----- | z | 41.39 | m | 26.70 | 11.97 | a | 17.73 | e | |||||
1954 | 0.10 | 16.50 | 10.13 | 29.40 | 37.03 | 53.33 | c | 54.68 | 50.68 | 45.63 | 34.32 | 26.40 | 13.58 | 30.98 | ||||||||||||
1955 | 0.19 | 2.32 | 7.39 | 35.50 | 42.30 | a | 50.63 | 58.68 | 57.39 | 44.55 | a | 37.06 | ----- | z | ----- | z | 33.60 | b | ||||||||
1956 | ----- | z | ----- | z | ----- | z | 25.73 | s | 37.81 | 51.73 | 50.90 | 51.53 | a | 40.97 | 38.68 | 23.03 | 8.97 | 37.95 | d | |||||||
1957 | -3.16 | 2.00 | 11.13 | 29.52 | a | 38.42 | 48.07 | a | 56.45 | b | 52.42 | 42.97 | 33.15 | d | 25.24 | i | 9.38 | e | 29.12 | a | ||||||
1958 | 10.65 | h | -5.84 | i | 15.48 | d | 27.24 | e | 35.47 | a | 41.65 | d | 51.32 | c | 50.32 | 46.80 | 35.84 | 22.80 | -1.87 | 32.51 | b | |||||
1959 | -9.03 | -3.22 | a | 12.35 | 26.68 | b | 40.42 | 50.14 | a | 52.35 | 55.90 | 45.53 | 32.39 | 9.93 | 14.32 | 27.31 | ||||||||||
1960 | 1.87 | 2.24 | -1.13 | 28.30 | 37.90 | 43.71 | b | 49.19 | 53.73 | a | 46.70 | 36.71 | 26.60 | 5.32 | c | 27.60 | ||||||||||
1961 | 0.55 | 12.32 | 21.06 | 28.73 | 36.39 | 48.93 | 54.94 | 55.90 | 47.93 | 38.35 | 25.00 | 9.07 | a | 31.60 | ||||||||||||
1962 | -2.10 | a | 1.29 | 19.26 | 28.37 | 45.55 | 47.87 | 52.48 | 52.77 | a | 44.83 | 38.65 | 27.63 | 7.53 | a | 30.34 | ||||||||||
1963 | -5.35 | -5.07 | 15.97 | 31.13 | 39.73 | a | 50.63 | 55.68 | 51.00 | a | 47.60 | 43.23 | 28.37 | 2.90 | 29.65 | |||||||||||
1964 | 9.32 | 5.07 | 10.45 | 29.00 | a | 45.35 | 49.47 | 56.23 | 50.90 | 45.20 | 35.97 | 25.53 | 2.16 | 30.39 | ||||||||||||
1965 | -5.19 | -4.43 | 4.74 | 28.97 | 43.19 | 47.07 | 51.42 | 51.55 | 42.07 | 36.48 | 21.97 | 17.23 | 27.92 | |||||||||||||
1966 | -7.61 | 3.61 | 18.90 | 27.47 | 35.77 | 50.43 | 57.84 | 53.00 | j | ----- | z | 33.81 | 21.13 | 8.55 | 24.99 | b | ||||||||||
1967 | 2.97 | -6.46 | 15.35 | 29.13 | 34.00 | 48.60 | 52.16 | 49.84 | 43.87 | 33.71 | 20.33 | 9.10 | 27.72 | |||||||||||||
1968 | 1.13 | -2.34 | 19.48 | 30.63 | 38.48 | 46.87 | 55.33 | a | 52.45 | 47.70 | 39.61 | 23.00 | 6.65 | 29.92 | ||||||||||||
1969 | 1.94 | 2.43 | 6.90 | 31.73 | 40.26 | 44.27 | 52.71 | 54.06 | 47.20 | 34.32 | 23.13 | 11.35 | 29.19 | |||||||||||||
1970 | -5.52 | -2.07 | 7.74 | 23.62 | a | 39.74 | 51.10 | 56.87 | 52.90 | a | 44.93 | 36.94 | 20.57 | 4.42 | 27.60 | |||||||||||
1971 | -8.77 | -1.46 | 7.77 | 28.13 | 35.73 | a | 51.20 | 51.65 | 48.13 | 44.07 | a | 41.13 | 23.60 | 6.55 | 27.31 | |||||||||||
1972 | -11.84 | -8.52 | 8.13 | 24.43 | 43.87 | 45.90 | 53.26 | 51.45 | 41.93 | 30.71 | 24.33 | 2.90 | 25.55 | |||||||||||||
1973 | 0.19 | 2.39 | 24.90 | 28.97 | 36.94 | 51.47 | 54.65 | 56.32 | 43.10 | 39.48 | 23.50 | 3.81 | 30.48 | |||||||||||||
1974 | -1.45 | -6.43 | 13.65 | 26.37 | 37.23 | 46.27 | 57.68 | 52.03 | 39.03 | a | 34.06 | 25.13 | 12.27 | a | 27.99 | |||||||||||
1975 | 3.29 | 3.14 | 7.42 | 21.43 | 42.00 | 51.60 | 59.00 | a | 51.81 | 40.80 | 35.35 | 23.67 | 4.84 | 28.70 | ||||||||||||
1976 | -4.61 | 10.24 | 12.35 | 32.20 | 36.42 | 52.97 | 53.65 | 51.68 | 41.13 | 26.90 | 13.70 | -8.14 | c | 26.54 | ||||||||||||
1977 | -13.39 | 3.71 | 23.33 | d | 32.93 | 48.03 | a | 48.79 | a | 55.54 | g | 47.80 | a | 46.62 | a | 34.06 | 22.00 | 6.48 | 27.31 | a | ||||||
1978 | -4.29 | -5.54 | 9.81 | 27.73 | 41.74 | 48.07 | a | 55.94 | 54.65 | 47.03 | 35.26 | 19.21 | a | -0.23 | 27.45 | |||||||||||
1979 | -12.81 | -6.93 | 14.43 | a | 26.83 | 36.81 | 46.97 | a | 55.13 | a | 51.07 | b | 44.32 | b | 32.63 | a | 23.97 | 10.42 | 26.90 | |||||||
1980 | 0.58 | -1.03 | 9.19 | 30.37 | c | 43.41 | b | 48.41 | a | 55.11 | c | 55.96 | c | 42.48 | a | 30.39 | 22.53 | 5.03 | 28.54 | |||||||
1981 | -0.10 | a | 9.43 | ----- | z | 30.71 | b | 37.27 | a | 51.21 | a | 55.84 | 54.97 | 42.60 | 32.52 | 28.77 | 9.87 | 32.10 | a | |||||||
1982 | -12.23 | a | -2.82 | 12.73 | a | 25.73 | 44.39 | 44.73 | 56.17 | b | 50.23 | a | 44.48 | a | 38.21 | c | 19.34 | a | 14.90 | b | 27.99 | |||||
1983 | 4.25 | c | 17.04 | a | 21.38 | b | 25.17 | 36.06 | 49.00 | a | 58.43 | a | 57.10 | a | 47.17 | 34.43 | a | 26.03 | a | -8.00 | 30.67 | |||||
1984 | -5.81 | 16.93 | a | 7.29 | 28.83 | a | 37.74 | 52.47 | 53.74 | 57.35 | 42.38 | a | 38.77 | a | 19.15 | c | 5.42 | 29.52 | ||||||||
1985 | -3.00 | b | -2.76 | c | 20.43 | a | 32.03 | a | 41.71 | 45.48 | a | 51.32 | 50.97 | a | 41.90 | a | 32.03 | b | 14.14 | a | -5.63 | a | 26.55 | |||
1986 | 0.87 | 0.21 | 17.03 | 32.30 | 40.33 | a | 48.07 | b | 55.27 | a | 47.80 | a | 43.82 | b | 31.06 | 15.71 | b | 12.03 | a | 28.71 | ||||||
1987 | 6.07 | a | 13.14 | 20.55 | b | 29.43 | b | 39.86 | c | 51.47 | 56.47 | a | 51.93 | a | 43.86 | a | 29.21 | b | 24.41 | a | ----- | z | 33.31 | a | ||
1988 | ----- | z | -9.46 | a | 13.47 | a | 26.79 | a | 42.48 | 49.13 | 54.58 | 55.16 | 43.71 | b | 28.60 | a | 24.03 | a | 1.48 | d | 30.00 | a | ||||
1989 | 4.24 | b | -9.54 | b | 6.90 | 23.97 | a | 36.58 | 46.73 | 54.42 | 52.35 | 42.77 | 31.90 | 14.90 | -7.33 | a | 24.82 | |||||||||
1990 | 7.48 | -0.39 | 15.29 | 28.87 | 32.94 | 47.20 | 50.06 | 49.87 | 41.93 | 30.94 | 24.20 | 7.17 | a | 27.96 | ||||||||||||
1991 | -3.13 | 7.93 | ----- | z | 31.52 | a | 45.48 | 53.30 | 55.19 | 55.29 | 45.03 | a | 32.26 | 17.13 | 8.68 | 31.70 | a | |||||||||
1992 | 9.81 | 15.55 | 17.52 | 28.63 | 42.13 | 46.87 | 49.61 | 50.10 | 43.21 | b | 32.87 | 23.67 | 9.77 | 30.81 | ||||||||||||
1993 | 3.57 | a | 4.00 | 13.06 | 26.36 | b | 40.84 | 47.93 | 56.68 | 55.90 | 40.93 | a | 30.00 | 19.67 | 12.32 | 29.27 | ||||||||||
1994 | -11.77 | -2.56 | a | 17.96 | c | 27.17 | 39.80 | a | 50.79 | a | 54.29 | 52.00 | a | 49.87 | 38.03 | 26.07 | 15.46 | c | 29.76 | |||||||
1995 | 5.00 | 3.43 | 19.45 | 23.96 | b | 39.43 | a | 52.11 | b | 56.90 | 57.77 | a | 43.83 | 36.68 | 13.37 | 4.23 | 29.68 | |||||||||
1996 | -7.94 | -2.19 | b | 7.66 | b | 22.37 | 35.87 | 50.23 | 52.81 | 54.80 | a | 47.87 | 34.59 | b | 16.53 | 9.13 | 26.81 | |||||||||
1997 | -0.81 | 5.68 | 14.06 | 25.86 | a | 34.07 | a | 53.29 | b | 55.47 | a | 50.71 | 48.38 | a | 36.39 | 19.57 | 17.94 | 30.05 | ||||||||
1998 | 9.58 | 22.79 | 18.10 | 31.93 | 43.32 | 49.90 | 55.42 | 55.97 | 49.17 | 37.45 | 26.23 | 11.66 | b | 34.29 | ||||||||||||
1999 | -2.13 | 11.61 | 15.06 | 29.93 | 44.81 | 51.66 | a | 59.06 | 53.93 | c | 46.13 | 30.87 | 27.07 | a | 9.07 | a | 31.42 | |||||||||
2000 | -6.19 | 6.55 | 22.00 | 26.43 | 39.34 | b | 45.93 | c | 55.06 | 54.28 | b | 44.20 | 37.74 | 25.24 | a | -1.13 | 29.12 | |||||||||
2001 | 8.93 | a | -2.14 | 12.94 | 33.28 | a | 43.61 | 51.90 | a | 54.84 | 55.84 | 42.83 | 26.87 | 32.00 | 17.87 | 31.56 | ||||||||||
2002 | 10.74 | 12.36 | 6.94 | 28.03 | 35.97 | 51.27 | 58.90 | 54.06 | 49.11 | b | 28.10 | 20.23 | 12.58 | 30.69 | ||||||||||||
2003 | -1.32 | -2.64 | 12.65 | 25.90 | 37.87 | a | 47.83 | 54.19 | 54.97 | 46.90 | 33.87 | 21.20 | 13.03 | 28.70 | ||||||||||||
2004 | -2.74 | 7.72 | 19.97 | 27.87 | 36.87 | 45.93 | 52.58 | 47.65 | 50.93 | 37.29 | 26.10 | 6.68 | 29.74 | |||||||||||||
2005 | 0.52 | 11.64 | 11.58 | 32.77 | 38.84 | 54.13 | 55.74 | 55.39 | 48.73 | 36.84 | 22.83 | 11.32 | 31.69 | |||||||||||||
2006 | 17.00 | 1.64 | 15.77 | 33.43 | 43.32 | 50.23 | 58.90 | 54.67 | a | 42.80 | 29.68 | 26.20 | 17.23 | 32.57 | ||||||||||||
2007 | 7.03 | -5.54 | 19.70 | a | 26.03 | 44.61 | 53.27 | 55.10 | 54.26 | 46.83 | 39.11 | c | 23.37 | ----- | z | 33.07 | a | |||||||||
2008 | 3.10 | -0.93 | 8.10 | b | 28.03 | a | 35.10 | 49.27 | 53.74 | 50.23 | 46.37 | 33.45 | 20.80 | -0.45 | 27.23 | |||||||||||
2009 | -8.03 | 7.27 | b | 14.37 | a | 28.60 | 37.67 | a | 47.90 | 49.35 | 50.81 | 49.73 | 32.26 | 28.57 | 3.93 | b | 28.54 | |||||||||
2010 | 4.52 | 1.18 | 21.58 | 29.76 | a | 42.07 | a | 50.66 | a | 58.16 | 57.58 | 41.50 | 35.48 | 24.03 | 7.94 | 31.20 | ||||||||||
2011 | 0.03 | 5.89 | 15.06 | ----- | z | ----- | z | 49.33 | 59.37 | a | 56.47 | p | 44.19 | c | 38.32 | ----- | z | 14.42 | 28.33 | d | ||||||
2012 | 7.42 | 14.10 | 29.81 | 28.27 | ----- | z | 51.37 | 57.42 | 50.94 | 40.60 | 33.29 | 21.70 | 14.13 | 31.73 | a | |||||||||||
2013 | 4.13 | 1.11 | 8.29 | 23.40 | ----- | z | 47.87 | 53.61 | 53.45 | 46.07 | 36.42 | 19.43 | -3.00 | 26.43 | a | |||||||||||
2014 | -10.35 | ----- | z | 2.97 | 23.63 | ----- | z | 48.70 | 53.06 | 52.55 | 45.53 | 35.16 | 15.33 | ----- | z | 29.62 | c | |||||||||
2015 | ----- | z | ----- | z | ----- | z | 28.00 | 38.35 | 47.73 | 55.39 | 52.74 | 50.80 | 29.97 | a | 23.33 | 22.52 | 38.76 | c | ||||||||
2016 | 4.68 | 9.38 | 21.71 | 27.90 | ----- | z | ----- | z | 55.07 | a | ----- | z | 49.90 | 37.58 | ----- | z | 13.11 | d | 27.42 | d | ||||||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | 34.73 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.73 | k |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | 41.45 | 49.73 | 55.71 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.96 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -0.22 | 2.68 | 13.68 | 28.03 | 38.94 | 48.83 | 54.49 | 52.29 | 44.54 | 34.33 | 21.79 | 7.53 | 28.82 | |||||||||||||
S.D. | 7.51 | 6.94 | 5.88 | 3.16 | 3.69 | 3.28 | 2.87 | 3.12 | 3.08 | 3.50 | 4.47 | 6.45 | 2.29 | |||||||||||||
SKEW | -0.28 | 0.38 | 0.12 | 0.06 | 0.01 | -0.39 | -0.27 | -0.40 | 0.26 | -0.09 | -0.31 | -0.23 | 0.11 | |||||||||||||
MAX | 17.00 | 22.79 | 29.81 | 36.10 | 48.03 | 57.57 | 59.58 | 57.77 | 51.52 | 43.23 | 32.00 | 22.52 | 34.36 | |||||||||||||
MIN | -21.13 | -12.79 | -1.13 | 19.40 | 30.45 | 38.21 | 46.87 | 44.23 | 38.57 | 26.39 | 9.93 | -8.14 | 24.27 | |||||||||||||
YRS | 84 | 85 | 81 | 85 | 84 | 85 | 85 | 81 | 86 | 88 | 86 | 87 | 60 |