YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | 6.44 | f | 3.19 | b | 21.31 | b | 31.97 | 33.71 | c | 47.93 | 51.38 | g | 53.29 | g | 43.43 | 32.16 | 19.69 | a | 5.03 | 26.49 | c | |||||
1943 | -5.29 | c | 1.89 | 4.39 | 27.50 | 39.45 | 56.27 | 57.65 | 54.35 | 39.90 | 32.16 | 17.83 | 10.63 | a | 28.06 | |||||||||||
1944 | 12.94 | 4.97 | 12.27 | a | 26.40 | 44.90 | 54.83 | 53.45 | 52.45 | 45.52 | a | 29.87 | a | 30.43 | 7.06 | 31.26 | ||||||||||
1945 | 1.43 | a | -0.14 | 21.33 | a | 29.80 | 34.77 | 44.14 | a | 50.90 | b | 50.77 | a | 43.33 | 30.35 | 21.70 | 2.35 | 27.56 | ||||||||
1946 | 3.19 | 0.89 | 25.94 | 30.80 | 38.19 | 50.10 | 54.84 | 49.87 | 42.40 | 36.42 | 21.07 | 7.76 | b | 30.12 | ||||||||||||
1947 | 4.52 | 1.50 | 12.19 | 27.60 | 35.24 | b | 47.30 | 52.71 | 58.81 | 44.70 | 40.87 | 17.90 | 4.97 | a | 29.03 | |||||||||||
1948 | -9.52 | -2.32 | a | 8.61 | 31.48 | a | 38.71 | 48.53 | 55.26 | 52.61 | 43.97 | 30.48 | 28.10 | 6.74 | 27.72 | |||||||||||
1949 | 5.94 | 0.68 | 14.42 | 27.24 | a | 41.61 | 54.57 | 58.45 | 53.74 | 40.23 | 36.10 | 24.67 | 7.13 | 30.40 | ||||||||||||
1950 | -6.58 | -1.25 | 7.13 | 24.77 | 40.39 | ----- | z | ----- | z | 49.39 | 44.28 | a | 38.50 | a | 18.93 | 2.29 | 21.78 | b | ||||||||
1951 | -1.77 | 1.39 | 9.71 | 32.03 | 47.97 | 50.33 | 56.87 | 55.13 | 45.57 | 38.77 | 15.60 | 12.71 | c | 30.36 | ||||||||||||
1952 | 4.43 | a | 12.66 | 14.81 | 34.20 | 43.58 | 54.87 | 58.77 | 54.00 | 46.90 | 28.61 | 25.03 | 17.29 | 32.93 | ||||||||||||
1953 | 9.97 | 4.18 | 20.29 | 31.43 | 43.45 | 57.23 | 57.87 | 58.00 | 46.10 | a | 40.71 | 27.31 | a | 11.94 | 34.04 | |||||||||||
1954 | 1.06 | 17.86 | 15.74 | 33.07 | 39.16 | 55.97 | 58.32 | 54.90 | 48.31 | a | 36.45 | 27.20 | 14.77 | 33.57 | ||||||||||||
1955 | 1.97 | 0.96 | 12.81 | 37.43 | 44.93 | a | 52.20 | 61.84 | ----- | z | 46.83 | 37.35 | 17.76 | a | 0.94 | 28.64 | a | |||||||||
1956 | -0.77 | -2.72 | 13.10 | 29.47 | 42.13 | 55.70 | 54.53 | a | 54.87 | 42.87 | 41.06 | 23.33 | 12.87 | 30.54 | ||||||||||||
1957 | -3.90 | 7.00 | 17.00 | 32.50 | 41.23 | 53.57 | 59.92 | e | 54.86 | c | 44.43 | 35.71 | 24.70 | c | 12.55 | 31.63 | ||||||||||
1958 | 11.40 | a | 2.07 | 19.52 | 33.57 | 41.26 | 47.63 | 55.77 | 54.97 | 48.79 | a | 39.29 | 25.43 | 2.94 | 31.89 | |||||||||||
1959 | -4.13 | 1.00 | b | 17.65 | 33.70 | 46.77 | 54.80 | 56.97 | 61.71 | 50.40 | 36.39 | 15.33 | 20.87 | 32.62 | ||||||||||||
1960 | 8.23 | a | 7.00 | 5.71 | 34.13 | 44.52 | 50.13 | 54.87 | 58.48 | 50.93 | 37.55 | 27.03 | 8.74 | 32.28 | ||||||||||||
1961 | 4.20 | a | 12.21 | 24.23 | 29.30 | 39.35 | 52.40 | 56.17 | a | 56.35 | 48.67 | 38.23 | 23.93 | 9.00 | 32.84 | |||||||||||
1962 | -1.57 | a | 3.61 | 18.48 | 31.93 | 49.81 | 52.90 | 54.37 | a | 54.13 | 44.93 | 39.52 | 27.59 | a | 9.14 | b | 32.07 | |||||||||
1963 | -5.94 | -2.96 | 19.58 | 33.60 | 41.81 | 54.37 | 57.52 | 53.90 | 49.04 | e | 44.90 | 30.25 | f | 2.71 | 31.68 | a | ||||||||||
1964 | 9.81 | 6.83 | 16.65 | 32.90 | 46.06 | 52.27 | 58.97 | b | 52.48 | 46.97 | 35.97 | 27.13 | 3.30 | a | 32.44 | |||||||||||
1965 | -2.39 | -0.68 | 9.58 | 32.33 | 48.23 | 50.37 | c | 55.94 | 53.97 | 44.67 | 37.65 | 24.33 | 18.90 | 31.07 | ||||||||||||
1966 | -10.34 | b | 5.43 | 23.32 | 31.57 | 37.68 | 52.40 | 58.87 | 53.52 | 46.93 | b | 35.00 | 23.90 | 9.03 | 30.61 | |||||||||||
1967 | 6.26 | -5.14 | 16.61 | 33.87 | 36.87 | 53.40 | 55.16 | 50.45 | 43.40 | 35.32 | 19.27 | d | 10.10 | 29.63 | ||||||||||||
1968 | 2.06 | 1.52 | 24.23 | 33.37 | 42.26 | 54.27 | 57.65 | 55.32 | 47.77 | 41.39 | 25.77 | 8.52 | 32.84 | |||||||||||||
1969 | 0.90 | 7.11 | 11.77 | 34.93 | 45.61 | 47.53 | 57.10 | 56.61 | 47.00 | 35.42 | 22.21 | a | 12.26 | 31.54 | ||||||||||||
1970 | -4.84 | -0.96 | a | 10.45 | 33.47 | 47.26 | 55.83 | 58.61 | 54.84 | 47.93 | 40.55 | 22.77 | 10.52 | 31.37 | ||||||||||||
1971 | -5.45 | 5.39 | 14.26 | 29.93 | 38.84 | 57.63 | 55.19 | 52.35 | 49.27 | 45.23 | 25.80 | 10.26 | 31.56 | |||||||||||||
1972 | -6.81 | -1.97 | 14.03 | 29.30 | 46.58 | 49.23 | 56.42 | 57.35 | 47.03 | 33.87 | 27.50 | 4.93 | a | 29.79 | ||||||||||||
1973 | 3.47 | a | 9.93 | 29.81 | 33.14 | a | 42.10 | 55.97 | 59.16 | 58.58 | 50.20 | 41.39 | 25.66 | a | 9.61 | 34.92 | ||||||||||
1974 | 1.48 | 3.14 | 19.47 | a | 33.80 | 43.13 | 49.33 | 59.13 | 55.60 | a | 41.87 | 36.90 | 26.97 | a | 15.68 | 32.21 | ||||||||||
1975 | 3.60 | a | 6.07 | 12.16 | 28.47 | 46.74 | 55.00 | 59.96 | c | 56.55 | 44.00 | 37.48 | 26.83 | a | 8.40 | a | 32.11 | |||||||||
1976 | -2.03 | 14.55 | 21.57 | a | 34.77 | d | 42.13 | 53.50 | 56.74 | 53.06 | 43.47 | 30.90 | 14.10 | -4.52 | 29.85 | |||||||||||
1977 | -11.45 | 8.50 | 26.03 | a | 37.67 | 51.19 | 51.86 | b | 60.68 | 51.35 | 48.77 | 35.97 | 23.77 | 8.94 | 32.77 | |||||||||||
1978 | -3.13 | -4.25 | 14.90 | 33.03 | 46.37 | a | 52.03 | a | 57.87 | 58.06 | 52.93 | a | 37.16 | 21.07 | 1.55 | 30.63 | ||||||||||
1979 | -7.06 | -3.71 | 19.97 | 30.87 | 41.20 | a | 51.60 | 58.39 | 55.58 | 48.62 | a | 36.61 | 24.53 | 15.16 | 30.98 | |||||||||||
1980 | 1.83 | b | 2.72 | 13.50 | a | 33.90 | 43.74 | 53.28 | a | 58.10 | a | 57.23 | a | 47.73 | 33.90 | 25.13 | 7.68 | 31.56 | ||||||||
1981 | 4.94 | 10.75 | 23.00 | b | 33.82 | b | 42.03 | 54.00 | 58.19 | 58.10 | 45.43 | b | 35.58 | 28.75 | b | 9.13 | 33.64 | |||||||||
1982 | -9.66 | b | 0.61 | 18.03 | 29.20 | 50.06 | 49.40 | 59.87 | a | 54.32 | 48.57 | 40.57 | a | 24.11 | b | 18.48 | 31.96 | |||||||||
1983 | 8.97 | a | 19.89 | 23.43 | a | 29.00 | a | 40.48 | b | 52.07 | a | 59.88 | g | 61.70 | a | 48.23 | 38.68 | 27.63 | -4.70 | a | 31.40 | a | ||||
1984 | -0.82 | c | 19.28 | 15.33 | a | 35.63 | 42.03 | 57.77 | 56.71 | 61.19 | 49.55 | a | 40.83 | a | 23.13 | 4.62 | b | 33.77 | ||||||||
1985 | -4.67 | a | 1.62 | b | ----- | z | 36.83 | 45.94 | 49.33 | 57.55 | 53.67 | a | 48.23 | 35.23 | a | 21.00 | f | -1.10 | b | 32.26 | b | |||||
1986 | -0.81 | 5.08 | b | 19.67 | a | 37.18 | b | 45.29 | 51.60 | 60.29 | 52.86 | b | 47.89 | b | 37.16 | 20.77 | 16.62 | b | 32.80 | |||||||
1987 | 9.97 | 16.96 | a | 25.97 | a | 36.97 | 47.33 | a | 55.25 | b | 61.84 | 56.17 | b | 49.00 | 33.47 | a | 27.53 | 18.16 | 36.55 | |||||||
1988 | -0.29 | c | 0.07 | 21.80 | a | 31.62 | a | 44.77 | 52.60 | 61.97 | 59.71 | 47.00 | 31.19 | 26.45 | a | 11.20 | a | 32.34 | ||||||||
1989 | 6.30 | a | -1.89 | a | 13.84 | 30.97 | 42.80 | a | 50.73 | 59.26 | 55.60 | a | 46.48 | a | 36.94 | 19.35 | d | -4.76 | b | 29.63 | ||||||
1990 | 13.93 | a | 5.64 | 23.00 | 33.90 | a | 42.37 | a | 54.76 | a | 56.87 | 57.07 | a | 51.53 | 35.30 | a | 27.07 | 7.13 | 34.05 | |||||||
1991 | -2.77 | 8.36 | 20.77 | 35.03 | 49.61 | 58.30 | 58.55 | 58.35 | 45.83 | 33.90 | b | 17.64 | b | 11.65 | 32.94 | |||||||||||
1992 | 9.26 | 18.31 | 20.45 | 32.70 | 44.87 | 50.77 | 51.67 | a | 50.65 | 43.96 | b | 34.55 | b | 24.80 | 12.10 | a | 32.84 | |||||||||
1993 | -1.03 | a | 3.64 | 15.10 | a | 29.24 | a | 44.18 | c | 51.20 | 58.00 | b | 56.52 | b | 40.48 | a | 31.68 | 21.10 | a | 13.44 | d | 30.30 | ||||
1994 | -12.82 | c | -3.08 | b | 18.10 | a | 30.39 | g | 42.67 | d | 54.64 | e | 57.18 | t | 54.22 | d | 51.04 | g | 39.28 | f | 27.00 | g | 14.42 | g | 25.62 | f |
1995 | 5.76 | f | 3.42 | d | 18.88 | f | 27.36 | h | 41.43 | j | 57.09 | h | 59.00 | k | 61.09 | h | 43.20 | j | 37.55 | i | 14.95 | j | 3.21 | l | 3.42 | k |
1996 | -11.13 | h | -2.00 | g | 8.68 | i | 28.39 | g | 41.64 | i | 54.21 | k | 55.50 | i | 55.14 | i | 48.30 | j | 34.13 | h | 15.35 | j | 5.21 | l | ----- | z |
1997 | -1.77 | e | 9.90 | h | 16.40 | k | 30.31 | d | 37.30 | k | 54.73 | h | 58.36 | i | 52.36 | i | 47.52 | i | 35.13 | h | 17.05 | j | 20.24 | j | 14.27 | j |
1998 | 7.67 | j | 22.15 | h | 22.87 | h | 35.95 | i | 49.38 | j | 52.14 | i | 57.86 | i | 57.24 | j | 47.14 | i | 37.14 | i | 28.50 | h | 13.05 | j | ----- | z |
1999 | -4.28 | m | 17.30 | h | 18.70 | k | 36.70 | j | 48.10 | j | 52.91 | h | 60.70 | k | 55.65 | k | 44.82 | h | 33.52 | j | 27.55 | j | 12.95 | j | ----- | z |
2000 | -1.48 | j | 8.21 | j | 26.18 | i | 32.95 | k | 45.05 | i | 51.57 | i | 58.50 | k | 57.10 | k | 44.79 | k | 35.00 | l | 24.16 | k | -4.05 | j | ----- | z |
2001 | 4.10 | j | -1.95 | i | 16.29 | j | 32.95 | k | 44.95 | i | 55.41 | m | 56.90 | j | 58.32 | i | 46.11 | l | 37.95 | j | 33.21 | k | 20.33 | m | ----- | z |
2002 | 12.84 | l | 13.74 | i | 11.74 | l | 31.91 | h | 40.60 | k | 55.38 | n | 62.68 | l | 54.50 | m | 50.79 | k | 32.33 | g | 23.06 | m | 12.89 | l | ----- | z |
2003 | 2.88 | n | -4.88 | k | 17.57 | j | 32.30 | j | 43.67 | m | 54.00 | o | 55.60 | k | 58.74 | l | 47.68 | h | 32.25 | k | 23.06 | m | 12.53 | n | ----- | z |
2004 | -2.50 | m | 6.82 | l | 21.92 | g | 32.55 | h | 40.00 | n | 51.67 | l | 56.87 | h | 50.00 | k | 49.83 | l | 37.91 | h | 26.37 | 8.68 | c | 17.52 | j | |
2005 | 2.19 | j | 10.57 | e | 11.64 | f | 34.54 | b | 42.55 | b | 56.93 | 58.28 | b | 55.31 | b | 49.00 | e | 36.59 | b | 23.00 | e | 10.96 | c | 37.77 | b | |
2006 | 16.11 | d | 3.96 | b | 18.48 | b | 36.12 | d | 44.78 | d | 51.00 | a | 58.86 | c | 55.24 | b | 42.43 | 30.78 | d | 25.79 | b | 17.77 | a | 33.44 | ||
2007 | 5.43 | c | -0.57 | 20.65 | 31.19 | c | 45.00 | c | 52.70 | 56.24 | b | 55.58 | 47.46 | d | 41.35 | 22.04 | c | 6.13 | a | 31.93 | ||||||
2008 | 2.90 | a | -3.18 | g | 13.24 | b | 30.23 | 39.22 | h | 53.50 | 57.90 | 53.77 | 47.13 | 31.20 | f | 16.35 | d | -3.86 | b | 30.13 | c | |||||
2009 | -11.63 | d | 2.18 | 16.19 | 33.10 | 43.77 | 53.50 | 52.60 | a | 53.16 | 49.20 | 32.84 | 26.20 | 6.92 | f | 31.92 | a | |||||||||
2010 | 2.17 | a | 4.04 | 24.61 | 37.33 | 45.48 | 54.37 | 59.45 | 57.81 | 44.23 | 34.90 | 24.70 | 6.77 | 32.99 | ||||||||||||
2011 | 0.23 | 3.64 | 14.90 | 30.50 | 44.13 | 53.20 | 62.16 | 57.23 | 48.33 | 39.61 | 29.27 | 17.55 | 33.40 | |||||||||||||
2012 | 7.65 | 15.93 | 32.52 | 35.27 | 46.13 | 55.20 | 62.35 | 53.23 | 42.30 | 33.45 | 26.30 | 16.32 | 35.55 | |||||||||||||
2013 | 3.67 | a | 5.31 | b | 8.87 | 27.07 | 42.97 | 54.93 | 56.19 | 56.57 | a | 48.23 | 36.10 | 19.17 | -0.32 | 29.90 | ||||||||||
2014 | -7.53 | a | -7.46 | 7.84 | 29.27 | 45.71 | 55.37 | 56.52 | 56.71 | 46.83 | 35.03 | 14.57 | 17.16 | 29.17 | ||||||||||||
2015 | 1.55 | -7.96 | 16.19 | 33.53 | 44.35 | 54.03 | 58.10 | 55.81 | 53.43 | 37.34 | b | 29.97 | 23.97 | 33.36 | ||||||||||||
2016 | 3.26 | 7.72 | 26.65 | 33.63 | 43.16 | 54.57 | 59.61 | 55.19 | 52.70 | 41.10 | 33.33 | 12.65 | 35.30 | |||||||||||||
2017 | 9.97 | 17.11 | 20.13 | 35.97 | 44.03 | 53.60 | 57.58 | 55.06 | 50.96 | c | 40.03 | 20.80 | 7.60 | a | 34.40 | |||||||||||
2018 | 2.52 | -3.43 | 17.23 | 19.60 | 48.94 | 56.63 | 58.16 | 57.39 | 52.20 | 34.81 | 20.43 | 18.00 | 31.87 | |||||||||||||
2019 | 6.29 | -3.57 | 10.81 | 30.47 | 39.81 | d | 50.23 | 59.10 | k | 55.97 | 52.23 | 36.87 | 22.00 | 12.65 | 28.52 | a | ||||||||||
2020 | 10.48 | 2.48 | 24.87 | 30.50 | 45.03 | b | 55.00 | 61.65 | 58.03 | 47.23 | 32.32 | 28.30 | 15.00 | 34.24 | ||||||||||||
2021 | 10.81 | -1.89 | 26.16 | 33.50 | 43.65 | 57.60 | 58.19 | 57.68 | 48.13 | 43.13 | 25.57 | 14.06 | 34.72 | |||||||||||||
2022 | -5.55 | -1.18 | 18.16 | 29.77 | 46.29 | 54.03 | 59.42 | 58.00 | 49.93 | 36.16 | 25.60 | 8.13 | 31.56 | |||||||||||||
2023 | 15.03 | 6.75 | 16.61 | 33.40 | 46.13 | 55.27 | 56.58 | 57.16 | 54.00 | 42.10 | 25.70 | 26.29 | 36.25 | |||||||||||||
2024 | 15.27 | a | 19.62 | 21.94 | 33.46 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.94 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.57 | 4.25 | 17.59 | 32.06 | 43.45 | 53.03 | 57.64 | 55.45 | 47.02 | 36.60 | 23.73 | 9.69 | 32.03 | |||||||||||||
S.D. | 6.99 | 6.70 | 5.84 | 3.20 | 3.58 | 2.88 | 2.45 | 2.64 | 3.21 | 3.63 | 4.08 | 6.58 | 1.98 | |||||||||||||
SKEW | 0.04 | 0.73 | 0.03 | -0.86 | -0.42 | -0.57 | -0.42 | 0.03 | -0.07 | 0.08 | -0.45 | -0.11 | -0.04 | |||||||||||||
MAX | 16.11 | 19.89 | 32.52 | 37.67 | 51.19 | 58.30 | 62.35 | 61.71 | 54.00 | 45.23 | 33.33 | 26.29 | 36.55 | |||||||||||||
MIN | -12.82 | -7.96 | 4.39 | 19.60 | 33.71 | 44.14 | 50.90 | 49.39 | 39.90 | 28.61 | 14.10 | -4.76 | 27.56 | |||||||||||||
YRS | 72 | 73 | 71 | 72 | 71 | 71 | 67 | 70 | 71 | 70 | 70 | 71 | 61 |