YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.80 | d | 37.75 | 20.44 | 34.99 | i | ||
1928 | 24.16 | 27.38 | 36.90 | 41.13 | 51.18 | 57.98 | a | 63.78 | a | 60.71 | 56.17 | 47.13 | 34.20 | 19.84 | 43.38 | |||||||||||
1929 | 18.19 | 19.00 | 30.81 | 41.87 | 50.75 | a | 59.03 | 65.55 | 61.85 | 54.37 | 44.38 | a | 29.10 | 27.95 | 41.90 | |||||||||||
1930 | 17.63 | 29.39 | 31.61 | 46.68 | 48.65 | a | ----- | z | ----- | z | 61.55 | 54.52 | 42.85 | 31.77 | f | 20.00 | e | 39.21 | c | |||||||
1931 | 21.50 | 29.61 | 31.76 | 43.87 | 49.60 | ----- | z | ----- | z | ----- | z | 54.50 | r | 47.48 | 31.43 | 16.50 | 33.97 | d | ||||||||
1932 | 12.87 | a | 27.45 | 29.24 | b | 43.07 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.19 | a | 19.81 | 28.27 | f | |||
1933 | 19.02 | 13.59 | 30.55 | 35.60 | a | 47.19 | b | ----- | z | ----- | z | 64.84 | 59.43 | 48.26 | 36.98 | 29.11 | 38.46 | b | ||||||||
1934 | 27.31 | 34.21 | 41.14 | b | 46.73 | 56.33 | a | ----- | z | ----- | z | ----- | z | 50.40 | 43.81 | 29.23 | 20.76 | 38.88 | c | |||||||
1935 | 21.52 | j | 23.04 | a | 29.58 | 40.33 | 46.73 | ----- | z | ----- | z | 57.93 | c | 51.17 | 40.47 | 29.53 | a | 19.02 | 37.53 | c | ||||||
1936 | 19.67 | j | 23.19 | 32.26 | 45.07 | o | 54.95 | a | 61.68 | 65.16 | 63.50 | a | 55.26 | a | 45.15 | 34.32 | 25.06 | 46.05 | b | |||||||
1937 | 13.30 | a | 22.52 | c | 30.15 | a | 43.00 | 53.58 | ----- | z | ----- | z | 65.35 | a | 59.03 | 47.47 | 35.63 | 25.31 | 39.53 | b | ||||||
1938 | 20.97 | 26.39 | 33.65 | a | 44.35 | 48.35 | d | 61.62 | f | ----- | z | ----- | z | 57.14 | b | 47.72 | h | 26.00 | 22.50 | a | 34.92 | d | ||||
1939 | 19.72 | a | 14.23 | 32.85 | 45.69 | d | 53.58 | f | ----- | z | ----- | z | 64.08 | y | 58.80 | c | 46.15 | g | 36.70 | h | 30.11 | 33.57 | f | |||
1940 | 21.87 | 24.77 | a | 35.15 | a | 43.52 | c | ----- | z | ----- | z | ----- | z | 61.28 | o | 56.07 | i | 47.71 | c | 32.30 | 26.39 | 33.10 | e | |||
1941 | 22.18 | 30.55 | 32.29 | c | 38.45 | b | 53.03 | b | 52.15 | q | ----- | z | ----- | z | 53.72 | l | 45.34 | f | 34.92 | 26.23 | 33.95 | e | ||||
1942 | 20.72 | a | 22.19 | a | 27.81 | d | 43.12 | 50.04 | c | ----- | z | ----- | z | ----- | z | ----- | z | 45.56 | 36.30 | 24.97 | a | 33.84 | d | |||
1943 | 25.68 | a | 28.57 | e | 33.67 | a | 48.38 | a | 53.90 | a | 59.50 | a | 66.10 | 67.88 | c | 57.87 | 49.74 | n | 35.41 | h | 24.41 | c | 46.59 | b | ||
1944 | 23.24 | 27.26 | 28.37 | a | 41.11 | b | 49.65 | 59.42 | 63.47 | 64.10 | 57.17 | 47.88 | a | 40.53 | a | 26.63 | a | 44.07 | ||||||||
1945 | 22.40 | 30.39 | 36.05 | c | 43.18 | b | 55.89 | 58.93 | 64.98 | a | ----- | z | 55.26 | a | 48.05 | 34.18 | 22.48 | a | 42.89 | a | ||||||
1946 | 20.50 | 25.61 | 36.58 | 48.03 | a | 50.56 | 61.55 | 66.17 | a | 64.34 | 56.97 | a | 42.76 | 31.83 | 30.66 | 44.63 | ||||||||||
1947 | 17.21 | 27.46 | 33.37 | 41.52 | a | 52.69 | 56.72 | 65.26 | 62.77 | i | 60.05 | 47.85 | 28.00 | 22.50 | b | 41.15 | a | |||||||||
1948 | 21.50 | 24.70 | d | 25.71 | 43.68 | 50.93 | c | 58.20 | 64.15 | 63.55 | 57.85 | 45.73 | 27.28 | a | 23.05 | a | 42.19 | |||||||||
1949 | 17.45 | 17.20 | 31.69 | 42.60 | 49.31 | 57.18 | 63.27 | 62.24 | h | 59.05 | 44.37 | 38.73 | 24.27 | 40.47 | a | |||||||||||
1950 | 24.09 | d | 31.29 | 35.15 | 45.37 | 50.35 | 61.16 | a | 63.15 | 61.97 | 55.05 | a | ----- | z | ----- | z | ----- | z | 47.51 | c | ||||||
1951 | ----- | z | ----- | z | 33.50 | x | ----- | z | ----- | z | 63.78 | n | 69.85 | 68.05 | 58.08 | 45.92 | 28.95 | 20.08 | 48.49 | f | ||||||
1952 | 23.94 | 23.71 | 30.71 | 44.67 | 53.58 | 64.82 | 66.10 | 65.85 | 59.17 | 48.58 | 31.08 | 18.98 | 44.27 | |||||||||||||
1953 | 24.74 | 25.12 | 34.79 | 41.52 | 47.95 | 63.95 | 68.58 | 64.57 | i | 57.38 | 47.08 | 35.77 | 18.87 | 42.34 | a | |||||||||||
1954 | 24.74 | 33.55 | 33.03 | a | 48.77 | 53.77 | 61.95 | 67.92 | 63.68 | 59.43 | 48.79 | 36.03 | 25.23 | 46.41 | ||||||||||||
1955 | 19.84 | 19.98 | 34.23 | 41.97 | 50.74 | 60.45 | 66.15 | 65.68 | 58.57 | 47.03 | 33.55 | 24.55 | 43.56 | |||||||||||||
1956 | 30.16 | 21.29 | 36.77 | 42.90 | 55.94 | 65.35 | 67.52 | 63.50 | 60.50 | 48.19 | 29.82 | 24.45 | 45.53 | |||||||||||||
1957 | 26.55 | 34.57 | 34.45 | 40.47 | 47.10 | 59.60 | 65.00 | 63.52 | 55.92 | 46.74 | 28.47 | 27.16 | 44.13 | |||||||||||||
1958 | 23.73 | 30.26 | a | 30.23 | 40.92 | 55.45 | 64.43 | 66.39 | 67.44 | 58.30 | 47.94 | 35.73 | 30.71 | 45.96 | ||||||||||||
1959 | 24.48 | 27.43 | a | 32.62 | a | 43.12 | 51.89 | 63.50 | 66.73 | 64.82 | 56.86 | a | 45.55 | 34.23 | 29.47 | 45.06 | ||||||||||
1960 | 20.82 | t | 21.34 | 34.48 | 43.53 | 49.84 | 60.78 | 67.00 | a | 66.48 | 60.55 | 45.44 | 34.95 | 24.16 | 46.23 | a | ||||||||||
1961 | 22.40 | 27.30 | a | 33.84 | 42.52 | a | 53.16 | 63.13 | 66.06 | 64.94 | 53.72 | 45.26 | 31.26 | a | 19.98 | 43.63 | ||||||||||
1962 | 20.53 | a | 29.04 | a | 29.11 | 46.60 | a | 51.57 | a | 60.23 | 66.35 | 65.45 | 58.30 | 48.02 | 37.38 | 28.68 | a | 45.11 | ||||||||
1963 | 17.25 | a | 30.81 | a | 33.82 | 43.02 | 55.87 | 61.65 | 69.50 | 65.89 | 61.05 | 51.42 | 36.85 | 25.03 | 46.01 | |||||||||||
1964 | 18.90 | 18.86 | 28.82 | 39.50 | 52.44 | 59.62 | a | 67.79 | 63.34 | 57.72 | a | 48.79 | 33.22 | 21.61 | 42.55 | |||||||||||
1965 | 21.70 | a | 24.68 | 28.92 | 43.43 | 49.21 | 57.70 | 66.37 | 63.35 | 54.37 | 48.50 | 37.10 | a | 27.98 | c | 43.61 | ||||||||||
1966 | 19.45 | 20.93 | 35.60 | 44.60 | 55.82 | 61.20 | b | 70.24 | n | 65.17 | e | 56.79 | d | ----- | z | ----- | z | ----- | z | 44.94 | d | |||||
1967 | 27.54 | s | 27.35 | r | ----- | z | 39.93 | w | 47.98 | a | 55.87 | 64.87 | 60.95 | 54.17 | 45.10 | 36.50 | 22.75 | a | 48.52 | d | ||||||
1968 | 20.82 | 29.59 | a | 33.91 | c | ----- | z | ----- | z | ----- | z | 62.47 | 58.05 | c | 51.70 | j | ----- | z | ----- | z | ----- | z | 40.97 | g | ||
1969 | ----- | z | ----- | z | 33.58 | s | 42.43 | 49.95 | 54.82 | 64.55 | 64.18 | 55.85 | 42.69 | 32.43 | 27.60 | 48.28 | c | |||||||||
1970 | 23.06 | 32.93 | 31.68 | 36.82 | 50.05 | 56.55 | 63.95 | b | 63.43 | a | 52.07 | 39.71 | b | 33.25 | 24.47 | 42.33 | ||||||||||
1971 | 19.77 | 23.88 | 32.29 | 38.52 | 46.21 | 57.09 | a | 63.29 | 61.50 | 52.85 | 43.50 | 33.00 | 21.82 | 41.14 | ||||||||||||
1972 | 19.42 | 27.47 | 40.16 | 42.98 | 50.03 | 59.00 | 65.89 | 62.74 | 56.40 | 48.58 | 27.80 | 20.98 | 43.45 | |||||||||||||
1973 | 17.46 | c | 26.84 | 30.61 | 36.68 | b | 49.19 | 57.10 | 62.98 | 62.84 | 53.12 | 45.10 | 33.70 | 20.98 | 41.38 | |||||||||||
1974 | 20.56 | 20.65 | a | 37.16 | 40.93 | 51.98 | 60.72 | 63.34 | 59.84 | 54.38 | 47.05 | 33.68 | 21.20 | a | 42.63 | |||||||||||
1975 | 16.85 | a | 21.95 | 30.08 | 37.42 | 47.76 | 56.13 | 63.45 | 60.39 | 53.88 | 44.82 | 30.15 | 22.28 | d | 40.43 | |||||||||||
1976 | 18.21 | 30.83 | k | 32.23 | 42.42 | 50.45 | 56.55 | 64.73 | 60.87 | 55.60 | a | 43.36 | b | 31.79 | d | 22.59 | b | 43.53 | a | |||||||
1977 | 16.54 | g | 26.23 | 30.98 | b | 44.58 | 49.97 | b | 61.60 | 65.55 | 64.79 | c | 57.34 | b | 46.33 | e | 35.30 | 27.98 | 46.42 | a | ||||||
1978 | 23.62 | a | 24.20 | a | 36.83 | a | 43.10 | a | 46.68 | c | 57.23 | 64.71 | c | 61.17 | k | 56.00 | b | 46.94 | g | 36.32 | k | 19.00 | c | 41.26 | c | |
1979 | 15.77 | i | 22.33 | e | 31.14 | f | 39.39 | g | 50.39 | c | 56.39 | b | 62.79 | b | 60.88 | c | 57.86 | a | 48.76 | h | 28.42 | e | 27.15 | n | 48.44 | e |
1980 | 23.27 | k | 27.70 | i | 29.15 | n | 38.45 | i | ----- | z | 59.26 | g | 65.88 | f | 62.42 | m | 55.22 | n | 45.23 | p | 34.89 | u | ----- | z | ----- | z |
1981 | 30.15 | r | 28.96 | p | 31.85 | n | 44.38 | v | ----- | z | 59.67 | r | 64.74 | n | 62.86 | q | 57.66 | k | 47.75 | s | 37.00 | s | 30.25 | m | ----- | z |
1982 | 19.97 | m | 22.90 | g | 33.60 | j | 40.85 | m | 50.61 | v | 56.91 | h | 64.13 | l | 63.47 | p | 55.88 | m | 43.06 | o | 36.07 | o | 24.88 | n | ----- | z |
1983 | 22.96 | q | 28.11 | j | 32.76 | j | 40.42 | r | 45.65 | n | 55.17 | i | 64.05 | k | 65.20 | k | 58.74 | k | 46.90 | j | 28.98 | b | 21.86 | f | 28.98 | k |
1984 | 17.52 | h | 22.67 | 32.37 | 39.54 | b | 52.00 | c | 56.53 | a | 64.97 | 63.74 | 57.80 | 41.07 | a | 35.21 | k | 28.18 | a | 45.89 | b | |||||
1985 | 23.63 | 22.87 | a | 34.57 | b | 44.46 | c | 49.43 | b | 57.78 | 63.76 | 62.29 | 52.32 | 45.79 | b | 33.05 | a | 23.40 | e | 42.78 | ||||||
1986 | 28.97 | 30.67 | a | 38.48 | 42.03 | 47.75 | c | 58.83 | 61.87 | 63.08 | 51.91 | a | 43.55 | a | 35.72 | a | 27.29 | 44.18 | ||||||||
1987 | 24.71 | 29.68 | 33.35 | a | 44.03 | 49.17 | a | 58.63 | 63.25 | a | 61.61 | h | 53.18 | e | 47.64 | i | 33.79 | p | 23.60 | g | 44.50 | d | ||||
1988 | 16.31 | b | 26.32 | d | 30.48 | e | 43.91 | g | 49.44 | e | 61.21 | k | 63.94 | 62.52 | j | ----- | z | 49.65 | e | 33.66 | b | 25.18 | a | 36.87 | d | |
1989 | 20.74 | b | 28.12 | 39.16 | b | 47.50 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.69 | 32.98 | 23.63 | 31.39 | f | ||||
1990 | 20.34 | 25.34 | 35.63 | 43.57 | a | 47.71 | b | 60.77 | 61.92 | 60.61 | 57.65 | 43.68 | a | 34.08 | 18.91 | c | 42.52 | |||||||||
1991 | 20.13 | 28.63 | a | 29.52 | c | 39.02 | 48.26 | 55.27 | 62.56 | 62.03 | a | 53.90 | 45.19 | 28.50 | 22.35 | 41.28 | ||||||||||
1992 | 18.83 | a | 27.47 | 34.40 | 44.73 | 51.83 | h | 55.58 | 60.63 | 60.02 | 53.83 | a | 46.24 | 26.17 | 18.95 | b | 40.62 | a | ||||||||
1993 | 24.02 | b | 26.26 | a | 33.95 | 41.17 | 49.37 | 55.03 | a | 61.42 | 61.10 | b | 52.88 | 42.67 | a | 28.14 | b | 23.39 | 41.62 | |||||||
1994 | 23.34 | b | 22.33 | a | 34.93 | a | 42.42 | d | 49.52 | a | 60.22 | 63.90 | 64.53 | 54.85 | 42.58 | 29.48 | a | 27.76 | b | 42.99 | ||||||
1995 | 23.50 | b | 32.79 | d | 35.78 | a | 38.53 | 46.16 | b | 55.25 | 61.44 | 65.61 | 54.47 | 43.00 | 36.12 | b | 26.63 | 43.27 | ||||||||
1996 | 21.93 | a | 31.56 | b | 34.00 | a | 40.81 | a | 53.40 | a | 60.73 | 65.63 | 63.95 | a | 52.97 | 43.97 | b | 34.08 | 22.58 | a | 43.80 | |||||
1997 | 21.83 | b | 25.82 | 36.10 | a | 39.02 | a | 50.71 | b | 57.68 | 62.45 | 62.55 | 58.27 | 43.81 | d | 32.46 | d | 21.25 | a | 42.66 | ||||||
1998 | 24.40 | b | 24.75 | 32.61 | c | 38.06 | f | 48.90 | b | 54.97 | a | 65.58 | a | 62.90 | 58.18 | 43.79 | 34.93 | 27.15 | a | 43.47 | a | |||||
1999 | 27.58 | 30.09 | 37.65 | a | 37.97 | 47.48 | 55.97 | 63.29 | 61.68 | 52.86 | a | 45.60 | 37.59 | a | 23.62 | a | 43.45 | |||||||||
2000 | 25.93 | a | 30.79 | a | 35.25 | a | ----- | z | 52.47 | a | 60.52 | 65.42 | 65.97 | b | 57.50 | 45.55 | b | 26.48 | 25.45 | b | 44.67 | a | ||||
2001 | 20.40 | 24.96 | e | 32.93 | a | 42.15 | c | 51.68 | 58.97 | 65.48 | 62.05 | a | 56.80 | 45.39 | 37.00 | c | 20.56 | d | 43.20 | |||||||
2002 | 21.93 | b | 23.18 | 31.67 | a | 45.07 | a | 50.93 | a | 62.37 | 66.45 | 63.05 | a | 55.38 | 42.47 | 33.05 | a | 22.97 | a | 43.21 | ||||||
2003 | 29.32 | 27.98 | a | 33.19 | 41.37 | 50.50 | 56.83 | 67.83 | a | 64.50 | 54.38 | 47.77 | 32.18 | b | 25.43 | a | 44.28 | |||||||||
2004 | 22.90 | a | 22.48 | 38.95 | 41.67 | 49.84 | 58.42 | 62.92 | a | 61.42 | a | 53.88 | 43.37 | 33.90 | a | 24.06 | 42.82 | |||||||||
2005 | 29.12 | c | 28.48 | 32.45 | a | 41.95 | a | 50.68 | 56.13 | 65.56 | 62.56 | 56.48 | 45.71 | 34.45 | 23.57 | a | 43.93 | |||||||||
2006 | 24.32 | 28.14 | 33.10 | 42.43 | 52.18 | a | 61.67 | a | 65.73 | 63.06 | 50.67 | 43.56 | 34.86 | a | 25.07 | b | 43.73 | |||||||||
2007 | 19.83 | b | 24.75 | 37.28 | b | 41.67 | 49.84 | 58.46 | c | 65.26 | 64.92 | 56.15 | 44.57 | a | 35.47 | 20.26 | 43.20 | |||||||||
2008 | 15.98 | c | 23.46 | c | 30.97 | 39.30 | b | 47.85 | a | 57.10 | 64.42 | 63.42 | 55.08 | 44.98 | 35.33 | a | 24.04 | d | 41.83 | |||||||
2009 | 23.19 | d | 28.27 | b | 35.54 | c | 39.70 | 52.10 | b | 55.37 | 64.60 | b | 61.13 | 54.97 | 41.21 | 36.23 | b | 18.10 | b | 42.53 | ||||||
2010 | 21.97 | b | ----- | z | 30.61 | c | 42.22 | c | 47.60 | 60.20 | 65.55 | a | 62.21 | 57.67 | 46.86 | c | 30.81 | a | 30.35 | 45.09 | a | |||||
2011 | 21.26 | n | 22.23 | d | 35.26 | 40.84 | a | 46.27 | 58.50 | 66.15 | 66.11 | 55.75 | 45.28 | a | 32.14 | a | 21.98 | 44.59 | a | |||||||
2012 | 26.56 | w | 24.58 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.78 | 25.93 | 33.34 | 42.26 | 50.55 | 59.01 | 64.89 | 63.28 | 55.99 | 45.49 | 33.06 | 23.80 | 43.35 | |||||||||||||
S.D. | 3.55 | 4.33 | 3.02 | 2.71 | 2.59 | 2.67 | 1.92 | 2.16 | 2.49 | 2.33 | 3.32 | 3.36 | 1.35 | |||||||||||||
SKEW | 0.05 | -0.40 | 0.17 | -0.01 | 0.46 | 0.39 | 0.20 | -0.09 | -0.15 | -0.11 | -0.30 | 0.16 | 0.22 | |||||||||||||
MAX | 30.16 | 34.57 | 41.14 | 48.77 | 56.33 | 65.35 | 69.85 | 68.05 | 61.05 | 51.42 | 40.53 | 30.71 | 46.41 | |||||||||||||
MIN | 12.87 | 13.59 | 25.71 | 35.60 | 46.16 | 54.82 | 60.63 | 57.93 | 50.40 | 39.71 | 26.00 | 16.50 | 40.43 | |||||||||||||
YRS | 70 | 75 | 76 | 71 | 73 | 64 | 66 | 64 | 72 | 70 | 73 | 76 | 42 |