YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.63 | 53.10 | 47.78 | c | 29.81 | 15.88 | a | 14.60 | b | 36.47 | f | |||
1940 | 11.38 | b | 18.05 | a | 22.36 | b | 40.86 | a | 49.42 | 56.00 | 60.39 | 56.50 | 46.09 | a | 36.00 | a | 18.78 | c | 9.96 | f | 37.80 | a | ||||
1941 | ----- | z | 19.45 | 27.69 | 39.40 | 45.24 | 57.40 | 56.20 | a | 59.61 | 47.62 | b | 31.56 | e | 14.79 | d | 2.10 | p | 39.90 | b | ||||||
1942 | 20.00 | r | 28.39 | f | 19.60 | 36.17 | a | 49.58 | a | 55.80 | e | 57.19 | o | 55.55 | 50.20 | 35.90 | 11.88 | -1.65 | 34.78 | c | ||||||
1943 | 1.05 | 19.82 | 21.06 | 36.70 | 47.82 | 57.62 | 56.52 | ----- | z | ----- | z | ----- | z | 25.73 | 19.13 | a | 31.72 | c | ||||||||
1944 | 8.39 | 22.86 | 18.28 | a | 29.46 | f | 43.87 | 54.75 | 57.84 | 54.21 | 46.03 | 35.85 | 20.28 | 13.67 | d | 34.19 | a | |||||||||
1945 | 19.22 | b | 17.12 | c | 20.45 | 29.63 | 41.69 | 55.05 | 59.32 | 54.26 | 45.77 | 30.82 | 7.41 | a | 7.53 | 32.36 | ||||||||||
1946 | 8.77 | 11.62 | b | 10.81 | 28.73 | 42.79 | 56.52 | 60.35 | 54.03 | 47.12 | 34.31 | 10.68 | -2.40 | 30.28 | ||||||||||||
1947 | -10.68 | 15.54 | 27.19 | 33.13 | 45.31 | 55.07 | 61.56 | 53.82 | 44.53 | 33.81 | 22.25 | 17.77 | 33.28 | |||||||||||||
1948 | 13.95 | 3.91 | 11.66 | b | 26.43 | 45.40 | 55.52 | 56.66 | 52.16 | 44.37 | 33.76 | 9.53 | -2.36 | b | 29.25 | |||||||||||
1949 | 5.87 | -0.57 | 26.45 | 29.16 | a | 42.68 | 51.64 | a | 57.60 | 54.66 | 48.72 | 33.16 | 22.58 | -2.64 | b | 30.78 | ||||||||||
1950 | -3.66 | 5.46 | 25.00 | 34.48 | 46.16 | 53.80 | 58.27 | 58.42 | 47.32 | 30.27 | 6.08 | 8.76 | 30.86 | |||||||||||||
1951 | 2.03 | 4.82 | 10.98 | 36.68 | 46.47 | 52.57 | 60.82 | 55.13 | 47.45 | 30.26 | 19.00 | 0.18 | 30.53 | |||||||||||||
1952 | -1.92 | 16.00 | 18.84 | 32.15 | 40.35 | 53.12 | 57.29 | 53.42 | 44.02 | 35.95 | 28.20 | 15.48 | 32.74 | |||||||||||||
1953 | 1.60 | 15.21 | 16.52 | 34.75 | 46.03 | 59.55 | 60.21 | 54.32 | 46.65 | 31.00 | 16.67 | 13.87 | 33.03 | |||||||||||||
1954 | 0.94 | 0.39 | 19.08 | 31.67 | 47.45 | 55.07 | 55.98 | 53.94 | 46.13 | 36.50 | 21.75 | -1.76 | 30.59 | |||||||||||||
1955 | 12.02 | 9.21 | 17.08 | 26.28 | 40.31 | 51.25 | 58.35 | 52.31 | 44.63 | 28.87 | 0.08 | 1.32 | 28.48 | |||||||||||||
1956 | 4.97 | 5.28 | 16.94 | 33.90 | 43.27 | 53.15 | 57.37 | 54.81 | 43.47 | 24.53 | 11.03 | -4.13 | 28.72 | |||||||||||||
1957 | 4.77 | 6.89 | 26.26 | 35.07 | 47.84 | 61.65 | 59.50 | 58.10 | 47.02 | 34.42 | 28.92 | 3.02 | 34.45 | |||||||||||||
1958 | 13.00 | 16.25 | 24.71 | 37.92 | 46.42 | 55.25 | 56.23 | 54.21 | 43.53 | 25.16 | 17.48 | 10.73 | 33.41 | |||||||||||||
1959 | 4.03 | 10.91 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 4.03 | 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 | 28.42 | 20.34 | a | 6.93 | d | 18.56 | i | |
1971 | 4.56 | n | 15.88 | 13.09 | d | 34.12 | b | 41.98 | f | 52.06 | d | 56.98 | a | 57.87 | a | 46.09 | g | 28.97 | a | 13.34 | b | 7.12 | b | 31.05 | c | |
1972 | 4.96 | d | 9.38 | 12.52 | 21.81 | a | 43.37 | 51.80 | h | 62.02 | a | 61.33 | v | 44.72 | a | 30.32 | 17.72 | 2.15 | a | 24.90 | b | |||||
1973 | -4.48 | 8.95 | 22.05 | 35.83 | 44.85 | 54.97 | 57.27 | 52.43 | p | ----- | z | ----- | z | ----- | z | ----- | z | 31.35 | e | |||||||
1974 | ----- | z | ----- | z | ----- | z | 37.66 | e | 47.67 | e | 55.39 | k | 58.12 | c | 58.15 | g | ----- | z | ----- | z | 16.59 | c | 7.50 | h | 40.01 | h |
1975 | 3.93 | j | 5.92 | d | 17.98 | g | ----- | z | 43.34 | l | 51.98 | d | 58.36 | c | 54.67 | k | 47.08 | f | 35.07 | q | ----- | z | ----- | z | 38.75 | 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 | 12.11 | h | ----- | z |
1979 | 10.70 | a | -1.29 | 24.77 | 32.65 | 46.07 | c | 52.63 | 58.85 | e | 57.00 | k | 49.47 | a | 38.81 | d | 26.08 | d | -1.57 | k | 33.87 | b | ||||
1980 | 3.95 | i | 22.25 | c | 22.86 | b | 37.35 | c | 45.39 | c | 53.18 | 57.26 | b | 53.02 | i | 45.88 | 35.21 | c | 24.77 | b | -9.05 | c | 33.51 | b | ||
1981 | 28.04 | c | 20.52 | f | 31.11 | c | 32.29 | f | 49.21 | c | 54.13 | c | 51.00 | y | 56.50 | v | 46.43 | 33.74 | b | 16.09 | b | 7.82 | a | 33.32 | d | |
1982 | -2.33 | b | 12.23 | 20.94 | 28.80 | 41.93 | a | 52.59 | a | 55.90 | b | 54.56 | 45.50 | a | 22.53 | a | 15.91 | b | 15.62 | b | 30.35 | |||||
1983 | 7.18 | 15.56 | c | 23.68 | 36.15 | 46.69 | 55.87 | 58.82 | 53.59 | d | 43.63 | c | 32.32 | a | 21.07 | b | 12.10 | f | 35.87 | a | ||||||
1984 | 8.12 | a | 12.00 | a | 32.11 | c | 33.32 | ----- | z | 57.11 | g | ----- | z | ----- | z | ----- | z | ----- | z | 11.57 | b | 10.44 | d | 17.93 | f | |
1985 | 26.09 | b | 9.32 | 21.80 | a | 25.12 | a | 42.26 | d | 51.00 | 58.05 | b | 52.65 | a | 43.24 | a | 27.50 | c | 5.76 | e | 22.95 | b | 32.14 | |||
1986 | 20.07 | c | 18.19 | a | 22.22 | d | 28.72 | c | 45.72 | d | 53.40 | d | 56.57 | d | 50.78 | a | 46.57 | a | 36.50 | a | 20.70 | e | 21.02 | e | 35.04 | |
1987 | 16.04 | f | 20.36 | 20.59 | b | 35.82 | b | 45.62 | f | 52.38 | d | 57.38 | c | 55.45 | c | 45.07 | b | 36.38 | c | 21.48 | 4.78 | f | 38.32 | c | ||
1988 | 8.88 | c | 17.96 | b | 28.43 | b | 35.72 | c | 47.27 | c | 57.82 | e | 60.30 | d | 55.83 | b | 47.09 | a | 29.57 | b | 15.02 | c | 14.59 | d | 34.87 | |
1989 | -10.11 | h | 8.73 | 18.37 | a | 36.12 | a | 45.88 | a | 55.18 | b | 60.02 | 57.05 | 48.13 | d | 31.57 | b | 10.14 | a | 18.94 | e | 35.47 | a | |||
1990 | 7.45 | c | -7.71 | d | ----- | z | 37.38 | d | 49.41 | h | 58.42 | d | 59.79 | e | 56.78 | f | 45.31 | f | 28.46 | h | 6.07 | g | 5.75 | m | 31.07 | g |
1991 | 6.45 | j | 12.78 | h | 16.89 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | 16.20 | i | 14.15 | i | 21.89 | q | 27.60 | y | 35.73 | e | 54.81 | n | 57.50 | e | 54.17 | a | 38.31 | a | ----- | z | ----- | z | ----- | z | 46.43 | h |
1993 | 7.06 | v | ----- | z | 24.61 | l | 36.97 | m | 53.22 | h | 57.48 | a | 62.77 | g | 57.16 | f | 45.78 | c | 36.67 | d | 18.52 | b | 19.90 | j | 39.61 | h |
1994 | 19.18 | f | 12.29 | b | 21.62 | f | 38.00 | b | 47.54 | g | 57.50 | d | 60.71 | l | 58.04 | g | 47.40 | d | 32.21 | c | 9.69 | d | 13.14 | i | 32.85 | f |
1995 | 13.28 | f | 16.98 | c | 14.16 | 38.56 | c | 46.69 | 56.47 | 59.90 | 57.88 | b | 52.17 | f | 35.73 | e | 19.02 | e | 10.74 | h | 38.38 | c | ||||
1996 | -1.81 | d | 10.44 | e | 26.42 | e | 37.20 | c | 49.00 | a | 57.15 | 59.25 | a | 55.40 | b | 44.00 | a | 23.47 | a | 8.41 | b | 6.46 | g | 33.54 | a | |
1997 | 7.32 | i | 29.24 | i | 21.72 | a | 34.63 | c | 47.93 | c | 58.78 | a | 61.89 | 57.50 | b | 47.95 | 25.82 | f | 23.29 | a | 9.54 | d | 40.36 | c | ||
1998 | 8.96 | f | 20.50 | b | 25.24 | b | 36.82 | 43.35 | a | 54.86 | a | 57.09 | b | 52.45 | b | 45.64 | a | 33.19 | 17.21 | a | 10.13 | h | 38.63 | b | ||
1999 | 2.30 | a | 5.33 | d | 21.47 | b | 33.23 | 45.76 | d | 57.59 | b | 59.88 | a | 55.85 | a | 45.80 | c | 30.97 | b | 14.43 | c | 3.52 | g | 33.87 | a | |
2000 | 8.71 | c | 21.79 | a | 26.35 | d | 34.88 | b | 44.27 | a | 54.71 | a | 56.38 | c | 53.32 | 43.20 | b | 31.48 | a | 22.35 | 16.12 | e | 34.46 | |||
2001 | 21.94 | d | 19.05 | 28.97 | 36.35 | 43.48 | c | 59.78 | 58.36 | c | 58.40 | 49.18 | 29.76 | d | 15.79 | d | 3.26 | f | 38.28 | a | ||||||
2002 | 17.20 | a | 16.46 | a | 20.56 | d | 29.24 | c | 48.32 | c | 55.27 | b | 60.29 | 55.42 | f | 47.76 | c | 37.95 | 30.81 | c | 19.81 | b | 34.88 | a | ||
2003 | 14.41 | b | 26.43 | a | 22.94 | 35.12 | b | 45.81 | 53.71 | f | 59.62 | a | 55.10 | f | 44.02 | c | 36.76 | 13.73 | b | 8.90 | e | 30.77 | b | |||
2004 | -1.82 | c | 22.22 | 21.84 | 37.50 | a | 50.28 | b | 59.17 | 61.79 | 59.73 | 41.24 | a | 35.29 | 24.34 | a | 13.02 | i | 37.42 | a | ||||||
2005 | 8.98 | b | 14.94 | d | 29.13 | 36.58 | 50.29 | 53.88 | v | 60.17 | k | 57.52 | 48.02 | 32.52 | 8.57 | b | 19.98 | f | 31.84 | c | ||||||
2006 | -1.48 | a | 15.52 | 19.16 | 34.07 | a | 40.95 | u | 56.53 | k | 59.30 | c | 53.60 | a | 48.05 | a | 36.15 | 8.59 | b | 16.83 | e | 28.98 | b | |||
2007 | 10.12 | b | 7.28 | a | 10.23 | a | 38.94 | c | 47.95 | 56.73 | 57.98 | e | 57.40 | a | 47.95 | 32.50 | c | 27.06 | d | 13.39 | d | 33.96 | ||||
2008 | 6.33 | d | 11.14 | d | 27.13 | 31.11 | b | 44.80 | a | 52.55 | a | 56.48 | b | 54.71 | j | 46.66 | a | 25.06 | 16.83 | c | 5.60 | f | 31.81 | b | ||
2009 | 2.93 | b | 8.04 | b | 19.50 | b | 33.45 | b | 49.09 | c | 55.22 | 60.87 | a | 53.98 | 46.89 | b | 39.16 | b | 14.22 | a | 8.45 | b | 32.65 | |||
2010 | 10.55 | b | 19.62 | d | 24.81 | ----- | z | 48.61 | c | 53.84 | e | 56.03 | b | 56.44 | g | 47.55 | a | 36.12 | c | 18.57 | c | 2.11 | 31.78 | b | ||
2011 | 9.53 | a | 6.46 | 19.79 | b | 35.34 | h | 47.05 | 54.23 | d | 56.88 | a | 53.93 | c | 46.32 | b | 34.69 | 5.83 | 11.92 | e | 31.51 | a | ||||
2012 | -7.17 | a | 21.21 | h | 16.64 | b | 37.09 | b | 45.41 | b | 55.41 | c | 54.57 | c | 53.28 | a | 44.63 | 30.57 | a | 10.87 | 5.74 | 31.55 | a | |||
2013 | 17.13 | a | 21.70 | f | 21.39 | 34.32 | s | 44.77 | c | 60.73 | 60.35 | 56.11 | d | 50.07 | o | 36.30 | h | 16.83 | a | 8.16 | b | 35.68 | d | |||
2014 | 24.23 | a | 11.62 | 22.26 | b | 37.10 | d | ----- | z | ----- | z | 60.42 | a | 56.38 | f | ----- | z | 32.24 | 25.42 | 23.48 | a | 29.60 | d | |||
2015 | 10.85 | e | 22.52 | g | 25.45 | j | 38.08 | 50.65 | a | 58.79 | b | 59.90 | 57.03 | l | 44.73 | 38.73 | 16.45 | 12.85 | a | 36.78 | c | |||||
2016 | 20.42 | 23.45 | 30.00 | 42.28 | a | 52.45 | a | 58.92 | d | 63.42 | e | ----- | z | 46.17 | i | ----- | z | ----- | z | ----- | z | 41.56 | e | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 8.00 | 12.78 | 21.58 | 34.34 | 45.89 | 55.50 | 58.61 | 55.14 | 45.99 | 32.55 | 16.77 | 9.21 | 32.01 | |||||||||||||
S.D. | 8.73 | 7.23 | 5.32 | 4.13 | 3.04 | 2.56 | 1.90 | 2.13 | 2.15 | 3.98 | 6.60 | 8.13 | 2.03 | |||||||||||||
SKEW | 0.27 | -0.48 | -0.28 | -0.89 | -0.62 | 0.30 | 0.25 | 0.40 | -0.89 | -0.59 | -0.09 | -0.24 | -0.16 | |||||||||||||
MAX | 28.04 | 26.43 | 32.11 | 42.28 | 52.45 | 61.65 | 63.42 | 59.73 | 50.20 | 39.16 | 30.81 | 23.48 | 35.04 | |||||||||||||
MIN | -10.68 | -7.71 | 10.23 | 21.81 | 35.73 | 51.00 | 54.57 | 50.78 | 38.31 | 22.53 | 0.08 | -9.05 | 28.48 | |||||||||||||
YRS | 48 | 52 | 54 | 53 | 52 | 53 | 56 | 43 | 51 | 53 | 58 | 42 | 21 |