YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.16 | 42.55 | 36.52 | c | 20.94 | 6.34 | a | 5.60 | a | 26.02 | f | |||
1940 | 1.10 | b | 6.93 | a | 8.97 | a | 28.17 | 34.61 | 38.13 | 44.94 | 43.84 | 36.50 | 27.87 | a | 10.59 | c | 1.96 | f | 25.60 | a | ||||||
1941 | ----- | z | 8.75 | 17.13 | 29.90 | 33.71 | 45.30 | 46.10 | a | 47.03 | 34.36 | b | 20.42 | e | 5.77 | d | -6.75 | o | 28.85 | b | ||||||
1942 | 12.56 | o | 21.54 | b | 7.97 | 25.86 | a | 37.77 | a | 44.88 | e | 47.26 | h | 47.61 | 42.20 | 29.58 | 5.53 | -9.97 | 25.30 | b | ||||||
1943 | -8.16 | 11.82 | 8.87 | 26.57 | 35.16 | 45.67 | 47.87 | ----- | z | ----- | z | ----- | z | 19.13 | 13.19 | 22.24 | c | |||||||||
1944 | -0.58 | 15.45 | 5.42 | 17.42 | f | 34.48 | 45.47 | 49.35 | 46.06 | 38.47 | 29.29 | 14.70 | 5.28 | b | 25.76 | a | ||||||||||
1945 | 12.10 | b | 6.77 | b | 9.84 | 16.30 | 30.81 | 41.60 | 49.10 | 47.58 | 36.23 | 24.32 | -3.34 | a | -1.68 | 22.47 | ||||||||||
1946 | -1.13 | 0.04 | a | -1.16 | 17.03 | 34.42 | 44.87 | 49.35 | 45.58 | 38.00 | 29.13 | 2.87 | -11.48 | 20.63 | ||||||||||||
1947 | -23.48 | 5.18 | 18.58 | 22.87 | 34.29 | 42.33 | 48.71 | 41.71 | 37.20 | 27.61 | 15.13 | 11.55 | 23.47 | |||||||||||||
1948 | 6.39 | -10.00 | -2.33 | a | 11.93 | 33.87 | 43.30 | 47.81 | 41.23 | 35.20 | 27.74 | 2.53 | -12.60 | a | 18.76 | |||||||||||
1949 | -4.26 | -15.32 | 16.74 | 19.83 | 31.10 | 41.17 | a | 45.81 | 44.32 | 41.03 | 26.32 | 16.40 | -11.47 | a | 20.97 | |||||||||||
1950 | -14.52 | -7.64 | 12.23 | 24.70 | 35.00 | 42.63 | 47.42 | 46.10 | 38.90 | 21.61 | -3.13 | 0.23 | 20.29 | |||||||||||||
1951 | -7.00 | -7.25 | -4.39 | 27.33 | 33.13 | 42.27 | 49.42 | 47.58 | 40.03 | 21.19 | 13.30 | -10.55 | 20.42 | |||||||||||||
1952 | -13.26 | 7.38 | 7.19 | 22.33 | 30.68 | 41.27 | 47.87 | 42.87 | 32.70 | 30.55 | 23.57 | 9.32 | 23.54 | |||||||||||||
1953 | -8.29 | 6.11 | 3.45 | 23.97 | 33.90 | 48.07 | 47.55 | 46.00 | 37.47 | 22.58 | 8.53 | 6.23 | 22.96 | |||||||||||||
1954 | -9.81 | -15.21 | 5.26 | 18.73 | 33.97 | 42.03 | 44.52 | 43.71 | 36.27 | 28.71 | 15.10 | -12.29 | 19.25 | |||||||||||||
1955 | 2.61 | -1.29 | 4.45 | 15.30 | 29.32 | 41.70 | 46.84 | 42.77 | 35.50 | 21.58 | -9.30 | -9.45 | 18.34 | |||||||||||||
1956 | -4.68 | -5.45 | 4.06 | 23.83 | 34.68 | 42.80 | 46.90 | 45.16 | 33.47 | 14.87 | 2.40 | -12.90 | 18.76 | |||||||||||||
1957 | -4.35 | -6.57 | 15.19 | 23.40 | 34.58 | 47.47 | 46.26 | 46.71 | 39.03 | 25.81 | 25.10 | -5.48 | 23.93 | |||||||||||||
1958 | 4.48 | 5.32 | 12.19 | 25.77 | 36.00 | 44.30 | 47.35 | 45.39 | 34.27 | 15.23 | 10.77 | 2.58 | 23.64 | |||||||||||||
1959 | -7.00 | 0.19 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -7.00 | k | |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.10 | 12.97 | -2.97 | 10.37 | i | |||
1971 | -19.87 | a | 7.61 | -0.86 | b | 26.36 | b | 35.28 | f | 40.96 | d | 46.50 | a | 47.57 | a | 33.54 | f | 19.61 | 3.41 | a | -3.23 | 16.81 | b | |||
1972 | -10.03 | -0.76 | 0.71 | 7.07 | a | 32.58 | 40.23 | h | 48.50 | a | 49.56 | v | 34.10 | 22.16 | 8.40 | -8.23 | a | 13.45 | b | |||||||
1973 | -15.16 | -5.79 | 14.06 | 27.33 | 32.23 | 42.27 | 45.94 | 43.80 | p | ----- | z | ----- | z | ----- | z | ----- | z | 20.13 | e | |||||||
1974 | ----- | z | ----- | z | ----- | z | 25.19 | c | 31.52 | d | 39.55 | j | 44.86 | b | 44.56 | f | ----- | z | ----- | z | 7.81 | c | -3.46 | g | 27.35 | h |
1975 | -7.00 | i | -8.21 | d | 3.58 | g | ----- | z | 30.63 | l | 39.73 | d | 46.86 | c | 42.10 | j | 36.50 | f | 27.64 | q | ----- | z | ----- | z | 26.13 | i |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 4.42 | g | ----- | z |
1979 | 1.83 | a | -16.96 | 13.45 | 22.53 | 34.32 | c | 40.23 | 46.27 | e | 45.86 | j | 39.86 | a | 33.67 | d | 20.04 | d | -11.10 | j | 23.52 | b | ||||
1980 | -5.50 | i | 12.54 | c | 11.62 | b | 27.19 | c | 36.62 | b | 44.83 | 47.66 | b | 43.87 | h | 36.07 | 29.63 | a | 18.64 | b | -19.52 | b | 24.53 | b | ||
1981 | 23.82 | c | 13.82 | f | 22.39 | c | 19.62 | f | 37.21 | c | 42.37 | c | 42.00 | y | 43.40 | u | 34.17 | 25.97 | 6.75 | b | -2.17 | a | 23.81 | d | ||
1982 | -13.63 | a | 1.43 | 7.10 | 16.50 | 29.07 | a | 41.57 | 45.33 | a | 41.45 | 37.03 | 14.65 | 6.97 | a | 10.00 | b | 19.79 | ||||||||
1983 | -1.97 | 3.35 | b | 8.03 | 27.60 | 35.90 | 44.17 | 47.23 | 43.11 | d | 32.30 | c | 24.97 | 14.31 | a | 0.73 | a | 23.31 | ||||||||
1984 | -1.17 | a | 3.07 | 21.84 | 23.90 | ----- | z | 46.09 | g | ----- | z | ----- | z | ----- | z | ----- | z | 0.97 | a | 2.36 | c | 8.49 | f | |||
1985 | 20.24 | b | -1.64 | 10.06 | 12.28 | a | 30.83 | b | 39.53 | 45.34 | b | 41.40 | a | 32.79 | a | 17.07 | c | -6.50 | d | 17.72 | b | 21.59 | ||||
1986 | 13.86 | c | 5.89 | a | 7.41 | b | 17.52 | c | 32.43 | a | 39.33 | c | 42.89 | c | 41.30 | a | 37.90 | 27.37 | a | 13.15 | d | 15.71 | c | 24.56 | ||
1987 | 8.20 | f | 9.29 | 5.14 | b | 25.17 | a | 34.77 | e | 41.18 | b | 47.54 | c | 42.89 | c | 34.43 | 29.00 | c | 14.57 | -5.72 | f | 28.40 | b | |||
1988 | -0.93 | c | 7.33 | b | 18.30 | a | 26.86 | b | 36.82 | c | 46.72 | a | 49.82 | c | 46.60 | a | 36.17 | a | 22.97 | a | 5.71 | b | 6.22 | d | 25.22 | |
1989 | -22.78 | h | -3.82 | 1.60 | a | 25.76 | a | 35.67 | a | 43.90 | a | 47.87 | 48.39 | 40.12 | d | 23.81 | 1.69 | a | 11.85 | e | 25.17 | a | ||||
1990 | -2.41 | b | -22.64 | c | ----- | z | 25.85 | c | 38.30 | h | 46.54 | d | 46.65 | e | 45.15 | d | 36.21 | f | 15.74 | h | -5.26 | g | -5.94 | m | 23.19 | f |
1991 | -4.32 | i | 0.05 | h | -1.55 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | 8.73 | i | 2.71 | h | 6.69 | o | 13.86 | w | 21.04 | d | 44.19 | n | 46.92 | e | 45.35 | 27.07 | ----- | z | ----- | z | ----- | z | 35.10 | h | ||
1993 | -1.56 | v | ----- | z | 10.42 | l | 26.53 | m | 41.48 | h | 45.07 | a | 51.33 | g | 48.24 | f | 38.00 | c | 29.50 | c | 11.96 | b | 13.33 | j | 31.13 | h |
1994 | 14.54 | e | -0.46 | b | 12.88 | f | 28.54 | b | 35.84 | f | 45.69 | d | 48.95 | k | 48.08 | f | 36.26 | c | 24.97 | a | 1.58 | d | 4.57 | h | 21.59 | e |
1995 | 2.64 | c | 7.52 | c | -2.32 | 27.45 | a | 35.87 | 45.10 | 48.87 | 46.67 | a | 44.92 | f | 28.73 | e | 10.84 | e | 3.78 | h | 25.14 | b | ||||
1996 | -11.18 | c | 1.08 | e | 12.08 | e | 25.79 | b | 34.48 | 44.47 | 48.60 | a | 44.03 | 31.79 | a | 11.37 | a | -1.76 | a | -2.96 | d | 19.82 | ||||
1997 | -3.09 | i | 23.32 | i | 7.39 | 22.36 | b | 34.23 | a | 43.93 | 48.13 | 45.03 | 36.57 | 14.04 | c | 15.69 | a | -0.52 | d | 26.68 | b | |||||
1998 | -3.00 | c | 10.08 | b | 9.53 | a | 26.73 | 32.97 | 43.77 | 45.93 | b | 42.71 | 34.43 | 23.52 | 9.21 | a | -1.04 | d | 22.90 | |||||||
1999 | -7.93 | a | -12.11 | a | 7.38 | b | 21.87 | 31.96 | d | 43.41 | a | 48.80 | a | 45.61 | 35.00 | b | 21.83 | b | 3.96 | b | -5.41 | d | 19.53 | |||
2000 | -0.21 | c | 11.57 | a | 15.33 | a | 22.10 | a | 30.47 | a | 39.34 | a | 45.10 | 39.42 | 30.66 | a | 20.19 | 14.43 | 7.89 | d | 23.02 | |||||
2001 | 15.26 | d | 8.46 | 20.58 | 26.53 | 32.73 | a | 45.93 | 49.66 | b | 47.65 | 37.13 | 20.52 | b | 6.85 | c | -8.82 | c | 25.21 | |||||||
2002 | 10.00 | a | 6.52 | a | 5.00 | a | 16.50 | b | 35.14 | b | 41.89 | b | 47.52 | 42.44 | d | 38.69 | a | 30.71 | 25.62 | a | 14.03 | a | 26.17 | |||
2003 | 6.13 | a | 20.39 | 10.55 | 21.32 | b | 33.19 | 41.12 | f | 47.80 | a | 43.81 | e | 31.59 | c | 29.13 | 6.61 | b | 0.92 | e | 22.86 | a | ||||
2004 | -12.46 | c | 13.93 | 10.90 | 26.67 | 38.77 | 46.93 | 51.03 | 47.26 | 30.47 | 29.74 | 17.83 | 4.96 | h | 27.37 | a | ||||||||||
2005 | 0.24 | b | 4.54 | b | 20.16 | 25.80 | 38.84 | 43.20 | t | 49.76 | j | 47.35 | 41.23 | 25.58 | 1.48 | a | 14.88 | e | 22.01 | b | ||||||
2006 | -10.43 | a | 6.21 | 7.06 | 24.53 | 31.20 | u | 46.16 | k | 49.00 | a | 46.29 | 39.70 | 30.10 | -0.07 | b | 10.29 | c | 20.27 | b | ||||||
2007 | 3.38 | b | -5.11 | -4.06 | 27.34 | a | 36.16 | 44.10 | 47.48 | d | 47.53 | a | 40.33 | 26.42 | 23.63 | c | 7.00 | d | 24.52 | |||||||
2008 | -0.14 | c | -0.59 | b | 18.26 | 20.72 | a | 33.23 | a | 42.90 | 48.17 | a | 45.55 | i | 40.83 | 16.84 | 9.97 | a | -4.32 | c | 20.53 | a | ||||
2009 | -4.28 | b | -2.15 | b | 9.67 | a | 24.07 | 35.31 | b | 43.27 | 50.13 | a | 43.97 | 37.54 | b | 32.19 | 6.83 | 3.31 | b | 23.32 | ||||||
2010 | 3.77 | a | 13.69 | b | 14.10 | ----- | z | 35.35 | 44.35 | d | 48.26 | 48.07 | c | 37.17 | a | 28.13 | 12.75 | b | -6.61 | 25.37 | a | |||||
2011 | 1.61 | -5.71 | 5.07 | b | 25.68 | h | 34.42 | 43.79 | a | 45.97 | 45.71 | c | 37.07 | a | 27.29 | -2.63 | 2.64 | c | 21.38 | a | ||||||
2012 | -17.80 | a | 12.68 | d | 3.76 | b | 25.83 | 32.77 | a | 43.24 | a | 44.57 | a | 42.71 | 37.13 | 21.39 | 2.97 | -2.06 | 20.60 | |||||||
2013 | 11.19 | 15.45 | f | 10.39 | 21.67 | r | 32.07 | b | 44.50 | 48.00 | 45.89 | c | 42.88 | n | 30.83 | h | 9.27 | -0.32 | 25.12 | d | ||||||
2014 | 19.17 | a | 2.00 | 8.83 | b | 25.04 | d | ----- | z | ----- | z | 49.45 | 47.54 | e | ----- | z | 23.61 | 20.37 | 19.87 | 23.99 | c | |||||
2015 | 5.14 | b | 13.08 | c | 14.79 | g | 28.70 | 37.65 | 48.79 | b | 50.10 | 44.58 | l | 36.90 | 33.52 | 10.37 | 6.61 | 27.08 | b | |||||||
2016 | 13.84 | 15.79 | 20.45 | 30.83 | 41.03 | 47.41 | a | 53.78 | d | ----- | z | 37.09 | h | ----- | z | ----- | z | ----- | z | 31.88 | e | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -0.88 | 2.52 | 9.27 | 23.39 | 33.95 | 43.52 | 47.50 | 44.93 | 36.35 | 24.57 | 9.11 | 0.82 | 22.04 | |||||||||||||
S.D. | 10.59 | 9.58 | 6.79 | 4.90 | 3.01 | 2.39 | 1.91 | 2.26 | 3.11 | 5.25 | 7.93 | 9.28 | 2.25 | |||||||||||||
SKEW | 0.23 | -0.41 | 0.00 | -1.26 | -1.25 | -0.03 | 0.30 | -0.40 | -0.54 | -0.51 | 0.04 | 0.06 | -0.02 | |||||||||||||
MAX | 23.82 | 21.54 | 22.39 | 30.83 | 41.03 | 48.79 | 53.78 | 48.39 | 42.20 | 33.67 | 25.62 | 19.87 | 26.17 | |||||||||||||
MIN | -23.48 | -22.64 | -4.39 | 7.07 | 21.04 | 38.13 | 42.89 | 39.42 | 27.07 | 11.37 | -9.30 | -19.52 | 18.34 | |||||||||||||
YRS | 52 | 55 | 54 | 53 | 53 | 53 | 56 | 48 | 51 | 54 | 58 | 49 | 28 |