YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1924 | ----- | z | ----- | z | ----- | z | 41.65 | 53.15 | 63.95 | 66.71 | 65.94 | 57.70 | 47.03 | 38.22 | a | 20.93 | b | 50.59 | c | |||||||
1925 | 16.94 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.45 | 33.77 | 27.12 | b | 31.07 | h | |||
1926 | 20.44 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.76 | 66.48 | ----- | z | ----- | z | ----- | z | ----- | z | 50.56 | i | ||
1927 | 27.17 | a | 30.93 | ----- | z | ----- | z | ----- | z | ----- | z | 65.46 | d | 61.15 | a | 55.60 | 46.47 | a | 37.80 | 23.73 | a | 43.54 | d | |||
1928 | 26.93 | d | 28.48 | 38.13 | 41.28 | 53.19 | 58.44 | f | ----- | z | 63.82 | n | ----- | z | 48.46 | c | 32.65 | 21.25 | a | 36.30 | d | |||||
1929 | 21.59 | b | 21.65 | b | 31.57 | b | 38.62 | b | 48.52 | d | 57.48 | f | 64.48 | c | 59.87 | 53.06 | d | 45.00 | g | 26.43 | i | 27.21 | c | 40.73 | c | |
1930 | 18.73 | a | 34.00 | n | ----- | z | ----- | z | ----- | z | ----- | z | 66.97 | b | 63.50 | a | 55.25 | h | ----- | z | ----- | z | ----- | z | 49.73 | i |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.02 | a | 67.65 | 60.74 | a | 49.10 | 29.78 | c | 22.18 | 50.08 | f | |||
1932 | 15.66 | b | 30.41 | a | 33.39 | 43.30 | 52.03 | 59.80 | 67.61 | 64.94 | 58.28 | 45.71 | 36.72 | 19.02 | 43.90 | |||||||||||
1933 | 20.55 | 17.37 | a | 35.26 | 39.10 | 47.21 | 64.47 | 69.34 | 66.06 | 61.47 | a | 50.76 | 37.28 | a | 31.02 | 44.99 | ||||||||||
1934 | 27.46 | h | 35.17 | y | 47.12 | w | ----- | z | 58.88 | s | 64.61 | l | 71.23 | 69.10 | 58.38 | 47.27 | 37.28 | 26.33 | a | 51.60 | f | |||||
1935 | 24.24 | 32.72 | a | 35.63 | 43.67 | a | 48.84 | 64.22 | 68.56 | 65.37 | 58.90 | 47.11 | 34.64 | b | 27.73 | 45.97 | ||||||||||
1936 | 23.29 | b | 27.57 | b | 37.27 | a | 46.28 | 54.02 | 64.38 | a | 68.24 | 65.55 | 56.90 | 46.29 | c | 33.91 | a | 28.48 | a | 46.02 | ||||||
1937 | 11.63 | a | 24.28 | a | 34.74 | 42.18 | 54.50 | a | 59.92 | 66.26 | b | 65.97 | 59.10 | 47.98 | a | ----- | z | ----- | z | 46.66 | b | |||||
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.21 | 27.21 | k | |
1939 | 23.35 | 18.35 | b | 35.34 | c | 46.31 | d | 53.61 | 63.45 | b | 67.71 | ----- | z | 61.23 | 50.72 | a | 40.42 | 29.60 | a | 44.55 | a | |||||
1940 | 23.24 | 28.36 | a | 39.63 | a | 43.16 | a | 53.31 | 62.22 | 68.27 | 65.55 | a | 57.98 | a | 48.71 | ----- | z | ----- | z | 49.04 | b | |||||
1941 | 24.03 | 28.81 | a | 29.48 | a | 40.87 | 53.28 | b | 56.87 | 64.92 | a | 63.95 | ----- | z | ----- | z | ----- | z | ----- | z | 45.28 | d | ||||
1942 | 27.03 | 27.05 | 34.65 | a | 50.84 | h | 54.91 | b | 66.32 | b | 68.69 | 66.70 | c | 59.12 | 49.39 | 39.34 | a | 30.32 | 47.59 | a | ||||||
1943 | 27.52 | e | 32.89 | a | 37.04 | d | 51.15 | 53.48 | 59.27 | 66.32 | 63.60 | 57.77 | 46.44 | 34.30 | 24.23 | 46.17 | ||||||||||
1944 | 20.71 | 24.83 | 29.35 | a | 38.08 | 48.95 | 56.07 | 63.74 | 62.95 | 58.25 | 48.12 | a | 32.15 | 23.83 | a | 42.25 | ||||||||||
1945 | ----- | z | 28.98 | a | 31.45 | a | 37.61 | b | 51.48 | 55.45 | a | 64.53 | 64.32 | 55.30 | 46.74 | 33.05 | 20.21 | 44.47 | a | |||||||
1946 | 20.84 | 26.54 | 36.38 | a | 46.93 | 47.28 | a | 61.17 | 65.75 | a | 63.08 | 56.72 | 41.69 | 31.33 | a | 29.76 | 43.96 | |||||||||
1947 | 18.65 | a | 31.98 | 34.05 | 41.15 | 51.87 | 55.95 | 66.48 | 62.31 | 57.82 | 48.08 | 26.92 | 22.25 | a | 43.13 | |||||||||||
1948 | 19.73 | 24.33 | 26.61 | 42.79 | a | 51.81 | 57.83 | c | 65.52 | a | 64.27 | 59.02 | a | 46.73 | a | 28.71 | f | 26.31 | 44.09 | a | ||||||
1949 | 16.44 | 20.43 | 35.34 | 44.77 | 49.27 | 56.92 | 64.98 | 63.26 | 58.47 | 42.87 | d | 39.20 | 25.02 | 43.08 | ||||||||||||
1950 | 23.31 | 31.20 | 33.97 | 44.03 | 47.82 | 59.33 | 61.80 | h | 64.15 | 55.75 | 54.29 | 37.48 | a | 32.05 | 43.94 | a | ||||||||||
1951 | 24.55 | 29.59 | 34.59 | c | 43.15 | 53.40 | 59.15 | 69.29 | 64.87 | 58.41 | h | 45.98 | a | 28.40 | 21.47 | 43.13 | a | |||||||||
1952 | 22.85 | 22.16 | 26.95 | 43.82 | 52.73 | 62.27 | 65.42 | 64.21 | 58.37 | 49.46 | g | 29.62 | 21.98 | 42.76 | a | |||||||||||
1953 | 28.81 | 25.41 | 36.47 | 41.28 | 48.03 | 63.53 | 67.65 | 63.11 | 58.23 | 47.31 | 35.60 | 21.17 | a | 44.72 | ||||||||||||
1954 | 29.27 | 35.18 | 32.58 | 48.63 | 54.89 | 61.03 | 67.34 | 63.84 | 57.12 | 47.16 | 36.23 | 24.87 | 46.51 | |||||||||||||
1955 | 21.21 | 16.00 | 31.02 | 40.55 | 50.23 | 56.97 | 66.57 | a | 63.95 | l | 58.88 | 48.16 | 31.08 | 29.16 | 40.89 | a | ||||||||||
1956 | 31.55 | 23.62 | 35.08 | 42.67 | 54.52 | 64.97 | a | 65.06 | 61.92 | 60.62 | 48.13 | 27.97 | 21.24 | 44.78 | ||||||||||||
1957 | 25.31 | 33.64 | 35.23 | a | 41.88 | 47.44 | 60.93 | 64.98 | a | 62.94 | 55.17 | 45.94 | 27.97 | 27.97 | 44.12 | |||||||||||
1958 | 22.45 | 30.64 | 30.74 | 40.03 | 55.11 | 63.28 | 65.35 | 66.47 | 57.32 | 46.81 | 33.23 | 30.94 | 45.20 | |||||||||||||
1959 | 24.42 | a | 25.91 | a | 32.71 | 43.71 | a | 52.19 | 64.50 | 66.42 | 63.55 | 55.13 | 45.02 | 33.20 | 27.11 | 44.49 | ||||||||||
1960 | 18.27 | 20.19 | 36.47 | b | 44.68 | 52.39 | 63.12 | 67.32 | 65.63 | 59.07 | a | 45.11 | 35.30 | 20.77 | 44.03 | |||||||||||
1961 | 21.13 | 27.13 | b | 33.89 | 42.73 | 52.74 | 63.52 | 65.79 | 64.98 | 52.59 | b | 45.03 | 32.13 | 20.00 | 43.47 | |||||||||||
1962 | 20.03 | 30.84 | 30.37 | 46.93 | 51.44 | 60.88 | 64.93 | a | 64.97 | 58.00 | 47.44 | 37.63 | 26.82 | 45.02 | ||||||||||||
1963 | 16.34 | 31.11 | 33.47 | 43.05 | 56.45 | 60.02 | a | 67.44 | 63.50 | 59.12 | 50.65 | 33.09 | h | 23.52 | 45.88 | a | ||||||||||
1964 | 19.18 | 20.24 | 29.42 | a | 40.33 | 52.68 | 58.98 | f | 68.44 | 62.24 | 56.20 | 49.76 | 29.52 | 24.47 | 41.13 | a | ||||||||||
1965 | 24.55 | 24.82 | 30.29 | 42.67 | 48.63 | 57.55 | a | 65.44 | 63.31 | 52.27 | 47.73 | 37.90 | 27.97 | 43.59 | ||||||||||||
1966 | 20.37 | a | 21.79 | 37.13 | 42.33 | a | 53.18 | a | 59.58 | 67.65 | 64.79 | 58.20 | 45.53 | 38.23 | 26.06 | 44.57 | ||||||||||
1967 | 24.02 | 29.39 | 39.65 | 41.13 | 48.87 | 56.60 | 65.98 | c | 63.47 | 57.57 | 47.63 | 37.32 | 19.50 | a | 44.26 | |||||||||||
1968 | 20.90 | 29.97 | 35.53 | 37.30 | 48.24 | 60.20 | 64.50 | 59.45 | 53.72 | c | 46.94 | 31.52 | 21.57 | a | 42.49 | |||||||||||
1969 | 28.76 | 25.66 | 30.21 | 43.45 | 54.61 | 56.32 | 66.53 | 67.29 | 58.32 | 40.10 | 32.53 | 27.84 | 44.30 | |||||||||||||
1970 | 19.43 | j | 33.02 | 31.10 | 35.63 | 51.39 | 58.13 | 66.13 | 65.92 | 52.63 | 39.27 | a | 33.91 | c | 24.44 | 44.69 | a | |||||||||
1971 | 24.58 | a | 25.30 | 33.00 | 40.73 | 47.15 | 59.92 | 65.21 | 63.97 | 52.43 | 43.13 | 30.33 | 18.57 | d | 42.03 | |||||||||||
1972 | 21.27 | 30.74 | 38.77 | a | 42.26 | e | 49.09 | b | 59.63 | 65.67 | a | 62.74 | 56.13 | 44.97 | a | 28.42 | 18.43 | a | 43.18 | |||||||
1973 | 16.72 | a | 25.48 | 30.92 | a | 38.06 | e | 48.97 | 57.20 | 63.23 | 62.70 | a | 54.54 | c | 46.02 | 35.64 | a | 24.75 | a | 42.02 | ||||||
1974 | 18.65 | 20.23 | 36.43 | b | 37.12 | e | 53.33 | b | 62.85 | 65.60 | 63.96 | c | 57.73 | b | 48.24 | 34.20 | 21.50 | 43.32 | ||||||||
1975 | 19.94 | 24.88 | 31.72 | b | 38.17 | 48.38 | a | 57.88 | a | 66.22 | a | 63.87 | 56.58 | 46.79 | 32.43 | 27.27 | 42.84 | |||||||||
1976 | 21.05 | 33.90 | 33.31 | 43.20 | 51.98 | 59.73 | d | 67.40 | 62.89 | 57.66 | b | 43.79 | 35.18 | 26.58 | 44.72 | |||||||||||
1977 | 20.84 | 29.93 | 32.16 | 46.79 | b | 51.64 | b | 65.31 | a | 67.40 | 66.76 | 59.83 | 49.00 | a | 36.64 | b | 30.55 | 46.40 | ||||||||
1978 | 26.47 | 29.23 | 43.27 | 47.25 | 53.46 | d | 64.50 | 67.68 | c | 64.21 | c | 58.38 | d | 48.58 | g | 36.18 | b | 18.24 | b | 46.26 | a | |||||
1979 | 16.03 | 26.02 | c | 33.29 | c | 41.54 | f | 50.62 | f | 60.25 | 66.18 | f | 63.83 | b | 61.02 | b | 49.50 | b | 27.47 | a | 26.37 | 40.42 | c | |||
1980 | 25.92 | 31.36 | 32.37 | 40.62 | d | 48.28 | f | 62.15 | 67.52 | b | 64.55 | b | 56.77 | j | 45.40 | a | 34.04 | f | 37.79 | q | 46.24 | d | ||||
1981 | 30.87 | a | 30.19 | a | 33.13 | a | 47.47 | 49.84 | c | 60.92 | f | 67.22 | k | 64.12 | b | 57.71 | d | 43.97 | b | 39.23 | 28.73 | 42.52 | b | |||
1982 | 23.80 | a | 26.18 | 35.60 | a | 40.85 | 50.93 | a | 58.83 | 66.36 | b | 65.08 | 56.35 | c | 42.38 | e | 32.98 | 25.85 | 43.77 | |||||||
1983 | 27.22 | a | 30.13 | b | 36.10 | 38.07 | a | 48.21 | 57.75 | 64.69 | 64.75 | a | 59.62 | a | 48.06 | 33.93 | 26.62 | b | 44.60 | |||||||
1984 | 20.26 | 25.98 | 33.60 | a | 39.65 | 54.34 | i | ----- | z | 67.53 | 65.53 | 59.17 | 41.00 | 35.97 | a | 27.93 | c | 41.66 | b | |||||||
1985 | 24.27 | a | 23.80 | 36.13 | a | 46.07 | a | 53.05 | 62.07 | 66.42 | 66.08 | 54.58 | 47.25 | a | 33.53 | 26.62 | b | 44.99 | ||||||||
1986 | 31.76 | 34.18 | 40.76 | 44.38 | d | 51.47 | a | 62.02 | 65.14 | b | 66.11 | 53.64 | e | 43.81 | 36.91 | a | 26.69 | b | 46.41 | |||||||
1987 | 23.63 | a | 29.20 | 33.00 | b | 46.74 | g | 51.63 | e | 62.07 | 65.07 | c | 63.61 | c | 57.24 | a | 49.69 | 33.50 | 24.48 | b | 44.83 | a | ||||
1988 | 19.87 | 27.55 | 35.09 | c | 44.58 | r | 51.38 | c | 63.28 | 67.52 | a | 66.03 | 55.43 | a | 51.08 | k | 32.98 | c | 25.32 | a | 44.44 | b | ||||
1989 | 19.79 | 27.66 | 42.16 | 47.67 | a | 54.24 | 62.00 | a | 69.18 | c | 63.78 | a | 59.10 | a | 47.53 | b | 36.53 | 25.58 | 46.27 | |||||||
1990 | 25.26 | 30.68 | 38.95 | 46.73 | 52.18 | 66.93 | b | 66.90 | 65.53 | 61.57 | a | 46.67 | b | 35.28 | 20.40 | a | 46.42 | |||||||||
1991 | 18.31 | 29.43 | 34.24 | 41.10 | 51.88 | a | 60.90 | 65.98 | 65.35 | 58.05 | 49.63 | 31.78 | 22.13 | 44.07 | ||||||||||||
1992 | 19.95 | 31.38 | 39.21 | 49.77 | 53.96 | c | 60.40 | 64.27 | 64.67 | a | 59.13 | c | 50.56 | 28.00 | 23.13 | a | 45.37 | |||||||||
1993 | 28.71 | 29.46 | 38.10 | b | 43.02 | 52.87 | 59.97 | 66.74 | 63.87 | 56.64 | b | 45.23 | c | 30.58 | 25.97 | a | 45.10 | |||||||||
1994 | 28.36 | b | 25.66 | 39.84 | b | 44.00 | a | 54.15 | 65.88 | a | 68.76 | 68.23 | 59.37 | 45.97 | 32.89 | c | 28.89 | 46.83 | ||||||||
1995 | 26.82 | 37.81 | a | 38.32 | a | 42.45 | 47.73 | 57.61 | b | 64.95 | 68.32 | 58.78 | 47.32 | 39.82 | 31.06 | 46.75 | ||||||||||
1996 | 26.90 | 33.52 | a | 37.35 | 44.43 | a | 58.56 | 64.65 | 69.61 | 67.68 | 55.52 | 45.72 | b | 36.07 | a | 28.95 | a | 47.41 | ||||||||
1997 | 26.39 | 27.54 | 40.00 | 40.25 | 53.77 | 61.05 | 65.73 | 65.02 | 59.90 | 46.19 | 34.50 | 23.65 | 45.33 | |||||||||||||
1998 | 28.52 | 29.07 | 35.37 | 41.12 | 52.66 | 59.57 | 68.55 | a | 66.03 | 61.57 | 47.10 | b | 35.80 | 27.40 | 46.06 | |||||||||||
1999 | 30.71 | 33.50 | a | 42.18 | 39.85 | 50.66 | 59.71 | a | 66.77 | 63.45 | a | 55.58 | 49.27 | 41.52 | 26.23 | 46.62 | ||||||||||
2000 | 29.34 | 34.98 | 36.69 | 48.52 | 57.69 | 63.18 | 69.05 | 67.90 | 60.78 | a | 47.98 | 28.30 | 28.98 | 47.78 | ||||||||||||
2001 | 25.50 | a | 31.43 | a | 38.45 | a | 46.10 | 56.16 | b | 65.37 | 68.35 | 65.56 | 61.65 | 49.53 | a | 38.30 | 23.79 | 47.52 | ||||||||
2002 | 24.19 | 25.92 | c | 34.70 | a | 49.07 | 55.27 | 67.70 | 71.35 | 67.24 | 59.02 | 45.09 | c | 35.22 | 27.65 | 46.87 | ||||||||||
2003 | 33.69 | 29.20 | 37.82 | c | 44.83 | 55.34 | 62.48 | 73.55 | 69.07 | a | 58.88 | a | 53.64 | b | 34.48 | 27.82 | 48.40 | |||||||||
2004 | 23.13 | 24.61 | b | 43.08 | 44.97 | 55.05 | b | 62.80 | 67.95 | 65.33 | a | 57.09 | b | 47.02 | 33.98 | a | 27.32 | 46.03 | ||||||||
2005 | 33.92 | 33.25 | 36.22 | a | 44.15 | 54.60 | 60.24 | c | 70.45 | a | 64.73 | 59.00 | 48.67 | a | 37.55 | b | 26.55 | a | 47.44 | |||||||
2006 | 29.25 | a | 31.05 | 36.35 | a | 46.52 | 57.19 | b | 66.05 | 68.68 | 65.32 | a | 53.31 | a | 44.85 | a | 38.05 | a | 26.33 | a | 46.91 | |||||
2007 | 22.87 | 31.52 | a | 40.53 | a | 46.17 | 53.15 | 64.55 | 70.29 | 68.44 | 59.37 | 47.72 | b | 39.78 | a | 23.11 | c | 47.29 | ||||||||
2008 | 20.45 | a | 27.52 | 35.69 | 42.62 | b | 51.52 | a | 62.32 | 68.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.10 | e | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.43 | 27.99 | 35.14 | 43.01 | 52.09 | 61.22 | 66.96 | 64.79 | 57.61 | 46.91 | 34.32 | 25.31 | 45.09 | |||||||||||||
S.D. | 4.51 | 4.40 | 3.59 | 3.30 | 2.70 | 2.98 | 1.95 | 1.89 | 2.34 | 2.63 | 3.51 | 3.40 | 1.62 | |||||||||||||
SKEW | 0.13 | -0.49 | 0.05 | 0.13 | -0.08 | 0.02 | 0.75 | -0.02 | -0.50 | -0.27 | -0.26 | -0.26 | -0.04 | |||||||||||||
MAX | 33.92 | 37.81 | 43.27 | 51.15 | 58.56 | 67.70 | 73.55 | 69.10 | 61.65 | 54.29 | 41.52 | 32.05 | 48.40 | |||||||||||||
MIN | 11.63 | 16.00 | 26.61 | 35.63 | 47.15 | 55.45 | 63.23 | 59.45 | 52.27 | 39.27 | 26.92 | 18.24 | 42.02 | |||||||||||||
YRS | 79 | 78 | 77 | 74 | 75 | 73 | 79 | 79 | 76 | 76 | 74 | 78 | 53 |