YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.50 | u | 47.84 | 38.97 | 30.19 | 18.10 | 5.00 | e | 28.02 | g | ||||
1931 | 2.23 | 6.46 | 9.87 | 24.93 | a | 36.14 | c | 50.11 | b | 52.63 | a | 48.43 | c | 45.87 | 35.74 | 24.07 | 10.52 | 28.92 | ||||||||
1932 | 1.10 | -9.00 | -3.62 | b | 25.24 | a | 36.87 | 49.03 | a | 49.33 | d | 49.04 | c | 37.97 | 27.62 | g | 9.90 | -8.71 | 21.56 | a | ||||||
1933 | -5.97 | -13.04 | 6.63 | a | 24.30 | 38.77 | a | 54.30 | 55.40 | a | 47.17 | a | 45.57 | 25.26 | 12.14 | a | -13.32 | 23.10 | ||||||||
1934 | -1.71 | -13.50 | 2.23 | 26.47 | 41.10 | 49.73 | 50.39 | 45.13 | a | 40.96 | e | 35.10 | 23.87 | -5.32 | 24.54 | |||||||||||
1935 | -13.84 | 3.43 | 10.58 | 23.03 | a | 36.23 | 46.38 | a | 60.29 | 53.71 | 39.30 | 28.32 | 8.45 | a | 1.42 | 24.78 | ||||||||||
1936 | -18.94 | -24.93 | 13.77 | 18.30 | 40.71 | 46.47 | 56.48 | 52.58 | 42.83 | a | 23.25 | c | 10.07 | 2.30 | a | 21.91 | ||||||||||
1937 | -21.10 | a | -9.43 | 0.80 | a | 26.03 | 39.30 | a | 44.27 | s | ----- | z | ----- | z | ----- | z | 28.11 | v | 17.77 | -3.26 | 7.16 | e | ||||
1938 | -7.84 | 1.07 | 20.16 | 26.23 | 40.52 | 50.57 | 56.90 | 54.74 | 42.03 | 37.10 | 15.23 | 3.45 | 28.35 | |||||||||||||
1939 | -2.77 | -16.50 | b | 4.55 | 23.83 | 42.71 | 50.40 | 54.90 | 54.10 | 44.57 | 32.42 | 23.47 | 15.06 | 27.23 | ||||||||||||
1940 | -6.63 | a | 3.93 | 9.00 | j | 25.10 | a | 37.52 | 47.07 | 53.77 | 52.31 | b | 45.27 | 37.29 | 14.52 | a | 5.52 | 28.70 | a | |||||||
1941 | -2.57 | a | -1.86 | 11.65 | 37.20 | 45.90 | 51.97 | 56.35 | 50.10 | 47.00 | 33.32 | c | 19.67 | 5.35 | 29.51 | |||||||||||
1942 | 1.70 | a | -0.50 | 19.84 | 34.30 | c | 36.97 | 49.10 | 50.84 | 52.53 | a | 40.83 | 32.77 | 15.90 | -3.03 | 27.60 | ||||||||||
1943 | -13.74 | -3.88 | k | -1.96 | d | 25.63 | 36.87 | 49.40 | 54.17 | a | 50.26 | 38.47 | 31.63 | a | 17.20 | 0.59 | b | 26.23 | a | |||||||
1944 | 6.84 | -6.34 | 7.77 | a | 22.20 | 42.87 | 49.60 | 53.13 | 51.81 | 45.20 | 31.32 | 26.93 | 4.97 | 28.02 | ||||||||||||
1945 | -4.45 | -2.21 | 19.39 | 24.97 | 31.74 | 44.07 | a | 51.71 | 50.61 | 42.57 | 28.65 | 18.53 | -1.84 | 25.31 | ||||||||||||
1946 | -4.90 | -7.68 | 19.53 | a | 30.40 | 36.84 | 46.00 | 52.29 | 48.52 | 41.60 | 32.00 | 15.80 | -1.03 | 25.78 | ||||||||||||
1947 | -2.45 | -7.57 | 6.40 | a | 23.17 | 33.84 | 45.50 | 54.77 | 56.52 | 41.67 | 39.10 | 14.13 | -1.58 | 25.29 | ||||||||||||
1948 | -11.35 | -10.34 | 7.32 | 29.83 | a | 37.00 | 46.50 | 53.64 | c | 52.47 | a | 42.73 | 32.55 | 21.37 | -2.20 | a | 24.96 | |||||||||
1949 | -4.67 | a | -12.30 | a | 5.97 | 28.90 | 38.26 | 50.23 | 53.00 | 54.73 | a | 38.53 | 32.74 | 20.33 | -2.32 | 25.28 | ||||||||||
1950 | -20.00 | b | -7.96 | 1.68 | 20.07 | 35.55 | 45.21 | a | 51.07 | b | 45.87 | a | 44.14 | a | 35.48 | 13.62 | a | -5.60 | a | 21.59 | ||||||
1951 | -10.63 | d | -0.50 | 5.87 | a | 25.17 | 41.23 | 45.90 | 50.50 | a | 48.19 | 40.38 | a | 32.35 | 11.50 | -4.52 | b | 23.79 | ||||||||
1952 | -11.00 | b | 6.71 | a | 5.07 | c | 28.18 | b | 34.87 | 49.86 | a | 53.12 | e | 49.63 | a | 45.00 | a | 25.19 | 17.71 | b | 8.90 | a | 26.10 | |||
1953 | -2.97 | a | -2.12 | b | 13.45 | b | 24.57 | 35.48 | b | 48.39 | b | 52.19 | 53.45 | 42.13 | 37.24 | b | 24.52 | a | 1.17 | a | 27.29 | |||||
1954 | -14.77 | 11.35 | b | 4.39 | c | 24.00 | 35.71 | 50.14 | a | 52.84 | 48.90 | 42.83 | 31.19 | 24.53 | 9.97 | 26.76 | ||||||||||
1955 | -7.23 | a | -8.04 | -4.03 | a | 33.63 | 41.81 | 50.50 | 58.29 | 55.16 | 41.41 | a | 33.35 | 10.87 | -8.07 | a | 24.80 | |||||||||
1956 | -2.58 | -9.45 | 3.53 | a | 23.47 | 35.97 | 51.67 | 50.00 | 50.81 | 36.97 | a | 36.00 | b | 20.50 | 0.89 | d | 24.81 | |||||||||
1957 | -17.94 | -6.32 | 4.97 | 27.91 | h | 36.46 | c | 46.07 | a | 56.90 | 49.70 | h | 41.20 | 33.55 | b | 21.18 | b | 4.87 | 22.09 | b | ||||||
1958 | 4.32 | -4.96 | 16.90 | a | 28.45 | a | 35.07 | c | 40.21 | b | 51.26 | 48.52 | 43.62 | a | 33.34 | b | 17.57 | -12.59 | b | 25.14 | ||||||
1959 | -15.61 | c | -10.31 | b | 12.47 | a | 24.82 | b | 40.84 | f | 51.66 | a | 54.26 | 54.61 | 42.18 | b | 31.67 | a | 8.03 | a | 12.16 | 24.18 | a | |||
1960 | -4.19 | -2.31 | 1.38 | b | 28.59 | c | 37.29 | 46.03 | 51.71 | 54.31 | b | 43.40 | 33.03 | a | 22.31 | a | -6.37 | a | 25.43 | |||||||
1961 | -10.10 | 5.89 | a | 20.23 | 24.07 | 35.63 | a | 48.36 | b | 53.40 | a | 51.47 | a | 43.32 | b | 33.77 | a | 17.31 | d | 2.59 | b | 27.16 | ||||
1962 | -12.87 | -10.19 | b | 16.04 | c | 22.07 | c | 40.61 | c | 51.43 | g | 50.73 | e | 51.55 | b | 41.00 | e | 33.19 | d | 24.67 | f | 2.10 | b | 23.42 | b | |
1963 | -10.96 | h | -7.69 | b | 14.41 | d | 28.93 | a | 35.89 | d | 51.29 | f | 55.90 | b | 50.71 | 44.73 | d | 41.61 | 24.31 | a | -5.89 | c | 28.29 | b | ||
1964 | 0.41 | b | -0.93 | b | 3.90 | b | 25.11 | b | 41.58 | 47.48 | c | 54.46 | e | 48.39 | c | 39.59 | a | 31.25 | c | 20.07 | -5.57 | c | 25.48 | |||
1965 | -13.79 | b | -11.48 | e | 0.55 | 29.00 | a | 39.96 | c | 46.85 | c | 50.73 | a | 48.97 | 37.59 | a | 31.95 | i | 15.27 | d | 11.40 | f | 24.36 | b | ||
1966 | -21.37 | d | -9.92 | b | 18.07 | d | 25.00 | b | 34.63 | a | 49.67 | c | 57.78 | d | 51.39 | 41.00 | b | 30.89 | c | 12.30 | -0.29 | 24.10 | ||||
1967 | -6.40 | a | -17.00 | m | 17.43 | j | 24.79 | b | 32.20 | a | 48.11 | c | 50.36 | f | 47.03 | 42.00 | 31.75 | c | 17.54 | f | 3.63 | d | 27.89 | d | ||
1968 | -8.17 | b | -8.11 | a | 18.26 | d | 29.07 | 38.26 | 46.76 | e | 52.84 | 51.07 | c | 45.04 | c | 36.93 | c | 18.86 | p | 0.42 | e | 27.49 | a | |||
1969 | -7.62 | b | 0.63 | a | 6.10 | a | 30.70 | 40.16 | 42.58 | f | 53.26 | d | 55.04 | d | 44.65 | d | 30.29 | c | 16.57 | i | 10.28 | b | 26.35 | b | ||
1970 | -10.03 | -5.11 | 4.65 | 28.43 | 38.38 | b | 53.17 | g | 56.94 | 51.52 | b | 45.32 | b | 36.10 | b | 17.86 | b | -3.74 | 23.66 | a | ||||||
1971 | -16.79 | c | -0.46 | 11.13 | 27.73 | 36.81 | 52.62 | d | 48.63 | d | 48.97 | 42.70 | 37.07 | d | 18.03 | a | 0.03 | a | 25.54 | |||||||
1972 | -15.44 | d | -11.79 | e | 8.55 | 25.00 | a | 43.29 | 45.66 | a | 47.19 | 53.40 | a | 40.74 | g | 30.60 | k | 19.05 | i | -5.33 | d | 21.17 | c | |||
1973 | 0.50 | e | 3.92 | b | 26.30 | d | 25.62 | a | 37.38 | b | 47.90 | a | 50.39 | 55.13 | a | 39.74 | c | 39.50 | g | 18.43 | b | -0.35 | e | 27.72 | a | |
1974 | -10.83 | a | -3.64 | 8.06 | 28.59 | a | 36.28 | b | 47.10 | 55.07 | b | 48.07 | a | 35.56 | c | 30.93 | c | 18.04 | b | 10.74 | 25.33 | |||||
1975 | -1.37 | a | -1.37 | a | 5.39 | 23.21 | a | 41.97 | b | 49.14 | a | 56.10 | ----- | z | 37.59 | a | 32.14 | b | 16.39 | b | -0.65 | 23.50 | a | |||
1976 | -9.55 | b | 4.50 | c | 7.27 | a | 30.70 | 36.53 | a | 50.52 | a | 51.07 | a | 52.66 | b | 38.80 | e | 25.52 | b | 11.71 | i | -12.38 | b | 25.06 | a | |
1977 | -16.43 | c | 3.07 | 19.64 | c | 30.55 | a | 48.03 | a | 49.50 | 53.62 | b | 44.23 | e | 43.30 | g | 29.52 | j | 12.90 | i | 0.30 | d | 25.84 | c | ||
1978 | -9.46 | e | -15.40 | m | 8.96 | c | 27.15 | d | 41.35 | e | 46.36 | e | 52.40 | f | 50.82 | c | 48.07 | c | 34.54 | e | 11.00 | g | -7.83 | b | 26.66 | c |
1979 | -19.36 | c | -10.68 | c | 11.69 | b | 24.58 | d | 34.68 | 45.03 | 52.10 | b | 47.07 | a | 42.07 | b | 29.57 | a | 15.89 | c | 5.88 | e | 23.21 | |||
1980 | -8.69 | b | -1.93 | 3.83 | a | 30.13 | 41.60 | a | 47.30 | 52.62 | b | 50.00 | 39.38 | a | 28.12 | f | 20.96 | e | -2.03 | b | 24.83 | a | ||||
1981 | -3.24 | b | 6.07 | a | 19.10 | a | 30.88 | e | 37.29 | 48.46 | b | 53.32 | c | 52.10 | 40.70 | 31.06 | 26.44 | c | 3.77 | a | 28.83 | |||||
1982 | -24.95 | j | -3.63 | i | 6.09 | i | 22.96 | d | 43.29 | c | 43.10 | j | 53.86 | j | 46.86 | i | 42.91 | h | 37.50 | m | 14.06 | m | 7.86 | j | 33.12 | j |
1983 | 3.38 | j | 6.55 | f | 18.31 | e | 25.89 | c | 34.61 | c | 47.38 | d | 57.21 | c | 57.00 | b | 45.48 | g | 33.00 | f | 21.67 | l | -13.14 | c | 32.47 | e |
1984 | -8.00 | h | 13.15 | c | 8.46 | e | 29.74 | c | 35.83 | b | 50.17 | 51.17 | h | 54.29 | g | 38.16 | e | 38.08 | f | 16.43 | i | -3.96 | g | 29.25 | f | |
1985 | -11.23 | e | -6.62 | b | 17.21 | b | 30.58 | d | 42.32 | c | 43.78 | c | 49.87 | p | 47.40 | f | 41.22 | c | 30.85 | d | 0.77 | h | -12.84 | f | 23.51 | d |
1986 | -3.19 | d | -1.71 | 15.59 | b | 30.33 | c | 40.73 | a | 47.32 | b | 55.93 | c | 47.86 | b | 42.69 | d | 30.50 | e | 13.04 | e | 4.09 | i | 29.01 | a | |
1987 | -0.44 | d | 14.88 | d | 18.04 | d | 30.52 | a | 41.31 | e | 48.61 | b | 54.77 | a | 47.04 | e | 44.42 | f | 29.31 | e | 21.86 | h | 12.96 | d | 29.70 | b |
1988 | -11.69 | e | -13.12 | d | 13.79 | b | 25.17 | a | 45.03 | 52.47 | 52.21 | c | 54.17 | b | 42.83 | a | 27.48 | f | 19.65 | g | -1.67 | d | 25.92 | b | ||
1989 | -3.00 | c | -15.88 | c | 7.00 | c | 24.69 | d | 39.30 | a | 46.70 | 54.53 | a | 50.14 | c | 40.77 | d | 30.15 | e | 11.68 | e | -12.26 | d | 22.82 | ||
1990 | 2.76 | f | -3.96 | c | 16.21 | c | 26.04 | c | 35.93 | a | 51.19 | d | 51.93 | c | 50.89 | d | 41.45 | a | 28.50 | e | 17.71 | f | -5.80 | k | 33.13 | c |
1991 | -16.35 | k | -0.44 | l | 13.61 | h | 31.17 | a | 44.30 | d | 52.04 | e | 53.86 | c | 54.14 | b | 43.42 | d | 30.15 | d | 10.93 | p | 0.76 | n | 44.15 | e |
1992 | 5.61 | m | 6.95 | i | 11.80 | k | 26.20 | j | 41.43 | c | 46.95 | j | 47.43 | h | 48.22 | h | 42.30 | g | 28.11 | m | 20.57 | w | 0.57 | j | 41.43 | k |
1993 | -9.37 | l | -2.79 | i | 13.80 | k | 27.45 | h | 38.20 | k | 47.08 | f | 53.68 | f | 52.80 | k | 38.95 | i | 26.40 | k | 11.71 | w | 0.88 | o | ----- | z |
1994 | -18.45 | i | -8.90 | h | 16.00 | k | 25.83 | g | 40.44 | f | 50.81 | c | 53.30 | d | 52.54 | r | 43.81 | i | 37.68 | l | 21.11 | u | 11.28 | m | 52.06 | j |
1995 | 0.55 | k | -5.68 | i | 15.70 | k | 23.17 | f | 37.75 | g | 55.12 | e | 53.72 | m | 53.74 | l | 39.70 | j | 35.89 | l | 4.27 | o | -6.14 | j | 55.12 | k |
1996 | -23.00 | i | -5.55 | g | -2.53 | n | 22.91 | h | 37.44 | f | 51.20 | e | 52.46 | g | 54.00 | i | 41.21 | k | 29.87 | h | 7.77 | q | 2.16 | l | 51.20 | k |
1997 | -8.00 | i | -0.17 | j | 7.60 | k | 24.41 | h | 34.28 | f | 50.95 | h | 53.35 | k | 48.13 | h | 43.26 | k | 30.44 | o | 13.08 | r | 14.82 | n | ----- | z |
1998 | 3.00 | l | 17.42 | i | 15.14 | i | 30.64 | b | 43.29 | j | 51.61 | l | 54.42 | l | 54.67 | s | 45.17 | g | 35.30 | k | 15.42 | r | 6.42 | l | 30.64 | k |
1999 | -10.79 | l | 6.83 | j | 15.74 | h | 28.44 | e | 39.46 | r | 44.82 | m | 51.47 | p | 49.79 | g | 40.64 | h | 30.20 | k | 23.62 | n | 7.60 | k | 28.44 | k |
2000 | -10.40 | k | 9.21 | j | 17.50 | m | 29.43 | g | 42.09 | i | 48.40 | j | 55.19 | o | 53.50 | i | 38.71 | p | 35.15 | k | 23.29 | m | -10.26 | l | ----- | z |
2001 | 4.43 | h | -8.21 | i | 13.62 | j | 32.26 | g | 41.20 | k | 53.44 | n | 54.26 | h | 55.96 | h | 43.74 | k | 29.91 | t | 27.25 | r | 9.71 | q | ----- | z |
2002 | 1.53 | l | 6.22 | j | 3.80 | k | 27.40 | j | 33.52 | b | 52.25 | f | 56.86 | j | 54.30 | d | 47.30 | g | 27.32 | c | 15.11 | u | 8.71 | j | 38.38 | i |
2003 | -4.38 | j | -10.94 | j | 4.37 | l | 27.79 | f | 39.65 | e | 49.37 | c | 53.14 | i | 57.00 | e | 45.32 | h | 33.52 | h | 9.00 | p | 4.37 | l | 48.67 | i |
2004 | -14.43 | j | 3.95 | i | 12.80 | k | 27.28 | e | 35.30 | a | 44.50 | h | 51.38 | g | 47.18 | i | 48.77 | h | 37.36 | i | 25.64 | p | 1.04 | h | 31.29 | j |
2005 | -9.80 | k | 6.05 | i | 8.57 | j | 32.73 | d | 38.91 | i | 52.70 | j | 54.61 | m | 52.17 | g | 42.89 | l | 33.74 | l | 20.79 | k | 11.11 | l | 32.73 | k |
2006 | 13.05 | l | -4.24 | g | 16.58 | g | 34.54 | f | 45.48 | h | 50.40 | j | 58.91 | h | 52.48 | d | 42.87 | g | 29.68 | l | 18.12 | n | 8.90 | k | 52.48 | k |
2007 | 1.73 | i | -9.94 | k | 17.58 | e | 26.14 | i | 43.74 | d | 53.86 | i | 57.00 | l | 51.59 | d | 45.17 | 37.10 | 19.69 | d | 0.29 | 30.74 | e | |||
2008 | -5.19 | -9.18 | a | 9.10 | 25.38 | a | 34.16 | 48.17 | 52.35 | 52.83 | a | 44.70 | 34.25 | c | 20.57 | -8.52 | 24.89 | |||||||||
2009 | -12.97 | 0.71 | 11.94 | 28.10 | 35.29 | 47.57 | 49.23 | 50.13 | 48.80 | 30.35 | 25.33 | 0.83 | b | 26.28 | ||||||||||||
2010 | -2.71 | -3.57 | 23.68 | 32.90 | 41.81 | 50.57 | 56.84 | 56.45 | 41.97 | 36.19 | 20.13 | 1.58 | 29.65 | |||||||||||||
2011 | -6.39 | 0.36 | 12.00 | a | 29.87 | 40.32 | 50.60 | 57.74 | 54.94 | 42.97 | 38.00 | 22.80 | 11.55 | 29.56 | ||||||||||||
2012 | 7.74 | d | 9.52 | 28.71 | 29.82 | b | 43.13 | a | 51.90 | 58.16 | 51.97 | 39.23 | 31.97 | 20.23 | 5.06 | 31.45 | ||||||||||
2013 | -4.58 | -1.68 | 5.42 | 26.12 | m | 39.03 | 50.13 | 54.74 | 53.81 | d | 48.87 | 33.74 | ----- | z | -16.40 | k | 31.05 | c | ||||||||
2014 | ----- | z | -12.89 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -12.89 | k | |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.70 | 34.13 | 23.00 | 12.38 | j | 35.61 | i | |||
2016 | -4.58 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.21 | b | 29.67 | 3.16 | 15.86 | h | ||
2017 | -0.61 | 6.00 | g | 10.52 | 28.30 | c | 39.17 | a | 50.27 | 54.06 | 50.03 | 45.27 | 33.50 | a | 12.10 | -3.26 | 29.03 | a | ||||||||
2018 | -5.48 | -13.21 | i | 11.71 | 20.03 | 43.90 | 52.47 | 56.23 | 53.26 | 43.27 | 30.29 | 12.53 | 5.77 | 29.45 | a | |||||||||||
2019 | -11.81 | -10.18 | 7.68 | 27.70 | 37.16 | 49.47 | 55.81 | 51.16 | 45.57 | 32.29 | 14.13 | 2.52 | 25.12 | |||||||||||||
2020 | 1.00 | -6.41 | 11.97 | 23.30 | 39.55 | b | 51.83 | 56.39 | 52.97 | 42.50 | l | 25.07 | a | 18.70 | 8.13 | 25.68 | a | |||||||||
2021 | 7.61 | -7.75 | 22.03 | 30.07 | 40.77 | 53.40 | 56.00 | a | 56.42 | 48.73 | 39.90 | 20.73 | 4.90 | 31.07 | ||||||||||||
2022 | -12.26 | -11.07 | 11.55 | 23.73 | h | 48.71 | x | 50.40 | 55.84 | 56.10 | 46.23 | 35.03 | 19.40 | 1.97 | 25.32 | b | ||||||||||
2023 | 5.48 | -1.25 | 7.65 | 25.73 | 45.52 | 55.07 | 52.30 | a | 54.43 | a | 52.39 | g | 36.55 | 21.07 | 20.77 | 29.39 | a | |||||||||
2024 | 5.77 | 13.72 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9.75 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -6.90 | -3.92 | 10.77 | 27.06 | 38.81 | 48.98 | 53.74 | 51.54 | 42.54 | 32.62 | 18.13 | 0.71 | 26.07 | |||||||||||||
S.D. | 7.22 | 7.79 | 7.08 | 3.49 | 3.47 | 2.74 | 2.62 | 3.00 | 3.08 | 3.65 | 4.87 | 7.02 | 2.36 | |||||||||||||
SKEW | -0.01 | 0.31 | 0.21 | 0.17 | 0.31 | -0.24 | -0.02 | -0.19 | 0.16 | -0.18 | -0.04 | 0.17 | 0.40 | |||||||||||||
MAX | 7.74 | 14.88 | 28.71 | 37.20 | 48.03 | 55.12 | 60.29 | 57.00 | 49.70 | 41.61 | 29.67 | 20.77 | 31.45 | |||||||||||||
MIN | -21.37 | -24.93 | -4.03 | 18.30 | 31.74 | 40.21 | 47.19 | 44.23 | 35.56 | 23.25 | 8.03 | -13.32 | 21.59 | |||||||||||||
YRS | 70 | 68 | 71 | 75 | 77 | 72 | 69 | 73 | 69 | 68 | 61 | 69 | 39 |