YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | 20.88 | g | 29.12 | 35.52 | 44.12 | 55.95 | 66.63 | 72.02 | 70.34 | 65.22 | 50.39 | 37.73 | ----- | z | 52.70 | b | ||||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.47 | m | 67.11 | 56.93 | i | 46.93 | a | 36.91 | a | ----- | z | 50.32 | i | |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.40 | p | ----- | z |
1946 | 16.76 | 27.32 | 39.73 | 50.06 | m | 53.72 | a | 66.86 | a | 70.87 | a | 69.84 | ----- | z | ----- | z | 34.21 | b | 32.60 | 45.77 | c | |||||
1947 | 17.06 | 33.66 | 38.32 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.98 | g | 29.68 | i | |||
1948 | 25.03 | b | 29.72 | 32.19 | 49.42 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.85 | 33.24 | g | ||||
1949 | 22.98 | b | 25.36 | 39.32 | c | 48.23 | 53.62 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.69 | 32.32 | g | |||
1950 | 27.30 | d | 33.09 | 37.68 | a | 48.47 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.44 | c | 31.07 | b | 35.67 | f | ||
1951 | 27.75 | a | 29.70 | 33.87 | 45.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.09 | h | |||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.65 | 21.65 | k | |
1953 | 29.29 | b | 27.35 | b | 39.73 | a | 44.91 | c | ----- | z | 65.38 | 71.34 | 67.89 | 61.98 | 47.98 | 37.63 | 23.08 | 46.96 | a | |||||||
1954 | 29.56 | 35.70 | 36.89 | 51.60 | 57.55 | a | 64.76 | a | 71.42 | 69.40 | u | 62.07 | 50.42 | 37.26 | a | 24.50 | 47.43 | a | ||||||||
1955 | 22.19 | 24.16 | 36.82 | f | 43.90 | 53.25 | a | 62.03 | 69.08 | 69.27 | 62.17 | a | 50.16 | 36.15 | 27.95 | 47.30 | a | |||||||||
1956 | 34.19 | 24.66 | 38.73 | 45.57 | 58.40 | 69.10 | 70.18 | 67.32 | 62.87 | 50.13 | 29.78 | 25.02 | 47.99 | |||||||||||||
1957 | 30.24 | 38.45 | 37.48 | 44.45 | 51.35 | 64.85 | 69.11 | 67.18 | 58.97 | a | 48.53 | a | 31.33 | 28.06 | 47.50 | |||||||||||
1958 | 25.42 | 35.00 | 34.47 | 44.08 | 58.90 | 67.55 | a | 69.15 | 70.48 | 60.20 | 49.38 | a | 35.00 | 30.81 | 48.37 | |||||||||||
1959 | 26.84 | b | 30.06 | a | 34.80 | a | 46.90 | 53.58 | 67.20 | 69.98 | 67.71 | 59.83 | a | 47.68 | 34.88 | 28.53 | 47.33 | |||||||||
1960 | 20.94 | 25.62 | 40.37 | 47.32 | 53.50 | 64.32 | 69.85 | 69.69 | 62.40 | 46.39 | 37.98 | 22.92 | 46.77 | |||||||||||||
1961 | 22.08 | a | 32.07 | 38.47 | 44.62 | a | 55.60 | 65.82 | 69.55 | 67.08 | 56.95 | 46.61 | 35.05 | 22.35 | 46.35 | |||||||||||
1962 | 21.81 | 34.09 | 33.18 | a | 47.80 | 53.32 | 62.82 | 68.16 | 67.71 | 60.85 | 49.40 | 39.00 | 28.44 | 47.21 | ||||||||||||
1963 | 17.37 | 32.52 | 37.48 | 46.60 | 58.00 | 62.82 | 71.44 | 67.24 | 62.17 | 52.35 | 38.40 | 24.08 | g | 49.67 | a | |||||||||||
1964 | 20.79 | 18.70 | a | 32.13 | 43.30 | b | 55.81 | g | 64.70 | j | 69.66 | 66.15 | 59.47 | 49.35 | 35.55 | a | 28.66 | 42.38 | b | |||||||
1965 | 29.68 | 27.84 | 33.79 | 44.85 | 51.40 | 60.03 | 67.90 | 65.08 | 56.60 | 48.05 | 38.93 | 28.47 | a | 46.05 | ||||||||||||
1966 | 20.52 | 24.20 | a | 38.85 | 45.59 | a | 55.27 | 62.03 | 68.94 | 66.35 | 58.95 | 48.05 | a | 37.72 | 24.31 | 45.90 | ||||||||||
1967 | 21.85 | 31.20 | 41.58 | a | 44.90 | 51.34 | 61.22 | 69.48 | 64.15 | 58.13 | 47.95 | 36.82 | 18.16 | 45.57 | ||||||||||||
1968 | 20.66 | 33.66 | 36.29 | 40.90 | 51.30 | a | 61.95 | 66.06 | 62.63 | 56.53 | a | 47.68 | a | 32.28 | 21.47 | 44.28 | ||||||||||
1969 | 30.40 | 29.38 | 31.58 | 46.32 | 54.74 | 59.53 | 69.44 | 68.29 | 59.76 | a | 45.60 | 35.47 | 31.15 | 46.80 | ||||||||||||
1970 | 25.13 | 33.86 | 33.15 | 39.90 | 53.92 | 61.47 | a | 69.87 | 69.52 | 58.12 | 42.81 | 37.02 | 28.05 | 46.07 | ||||||||||||
1971 | 24.24 | 29.27 | 37.35 | 44.52 | 53.08 | 66.85 | c | 71.03 | 67.65 | 59.30 | 47.31 | 35.62 | 24.10 | 46.69 | ||||||||||||
1972 | 27.94 | 32.90 | 42.58 | a | 46.23 | 54.67 | a | 64.30 | 72.16 | 67.45 | 60.68 | 50.89 | 32.58 | 23.52 | 47.99 | |||||||||||
1973 | 17.60 | 26.82 | 35.70 | a | 41.13 | 53.60 | 62.43 | 69.31 | 68.40 | ----- | z | 50.07 | a | 38.20 | 27.84 | 44.65 | a | |||||||||
1974 | 23.47 | 28.04 | 42.90 | 43.52 | 57.21 | 68.03 | 69.24 | 66.19 | 57.90 | 50.98 | a | 36.28 | 22.08 | 47.15 | ||||||||||||
1975 | 20.94 | 29.27 | 37.84 | 42.90 | 51.70 | a | 62.32 | b | 68.92 | 66.65 | 58.65 | 49.02 | 34.62 | 26.63 | 45.79 | |||||||||||
1976 | 23.57 | b | 36.83 | 37.21 | c | 45.62 | a | 55.86 | b | 63.90 | 70.58 | 67.35 | 61.46 | b | 45.78 | a | 33.03 | 21.70 | a | 46.91 | ||||||
1977 | 17.87 | a | 29.18 | 36.27 | 48.52 | 54.77 | 67.78 | 70.82 | 69.17 | b | 63.20 | 50.55 | a | 38.66 | b | 32.78 | a | 48.30 | ||||||||
1978 | 29.24 | 30.68 | 42.23 | 47.69 | a | 52.53 | 66.26 | c | 71.10 | f | 67.46 | c | 61.79 | f | 51.06 | 39.29 | a | 22.08 | a | 44.85 | b | |||||
1979 | 19.50 | 26.61 | 38.18 | 45.17 | c | 53.78 | f | 63.21 | b | 70.52 | a | 66.55 | j | 63.42 | 52.42 | 32.12 | a | 29.42 | 44.06 | b | ||||||
1980 | 32.03 | 35.00 | 36.77 | 44.46 | b | 53.29 | b | 66.23 | b | 71.97 | a | 68.92 | a | 61.12 | a | 47.16 | 36.26 | a | 34.05 | a | 48.94 | |||||
1981 | 31.52 | b | 33.12 | 36.23 | 50.19 | d | 54.23 | a | 66.18 | b | 71.19 | 68.30 | a | 61.72 | 49.60 | 39.91 | a | 32.24 | 49.54 | |||||||
1982 | 26.87 | 28.89 | a | 38.48 | 43.80 | 53.00 | g | 63.47 | 69.12 | a | 69.27 | a | 61.87 | c | 47.07 | a | 36.48 | c | 28.40 | k | 48.53 | b | ||||
1983 | 26.94 | 32.07 | a | 39.02 | c | 40.53 | 52.03 | 62.19 | a | 69.53 | a | 69.68 | 63.40 | a | 50.68 | a | 37.73 | 29.32 | 47.76 | |||||||
1984 | 22.71 | 32.21 | 38.18 | 44.41 | a | 59.27 | 63.88 | 69.97 | 67.69 | 61.27 | 44.26 | 36.73 | b | 30.58 | 47.60 | |||||||||||
1985 | 25.76 | 29.34 | 41.02 | 48.32 | 57.11 | 66.42 | 69.95 | 69.13 | 57.85 | 50.34 | 37.35 | 27.50 | 48.34 | |||||||||||||
1986 | 33.32 | 34.61 | 42.16 | 47.88 | a | 56.37 | 65.37 | 67.95 | 70.21 | 59.22 | a | 47.23 | 37.78 | 30.25 | a | 49.36 | ||||||||||
1987 | 22.88 | a | 30.80 | 36.85 | 47.72 | a | 53.03 | 63.87 | 68.14 | f | 65.83 | h | 58.81 | i | 50.22 | d | 35.93 | 24.92 | 40.69 | c | ||||||
1988 | 18.94 | 33.10 | 37.31 | 46.24 | a | 54.77 | c | 64.48 | f | 69.95 | j | 67.42 | g | 58.00 | j | 50.50 | i | 36.59 | a | 27.47 | b | 36.34 | e | |||
1989 | 20.85 | 32.55 | 43.81 | 51.28 | e | 56.07 | i | 64.64 | h | 70.05 | k | 66.00 | h | 59.67 | j | 47.34 | i | 35.20 | 25.15 | a | 34.81 | f | ||||
1990 | 22.37 | 27.57 | 41.05 | 48.74 | a | 54.56 | 66.77 | f | 68.73 | i | 65.24 | h | 62.87 | k | 47.88 | e | 37.42 | 18.18 | 37.22 | d | ||||||
1991 | 20.18 | 32.16 | 37.00 | 44.82 | 54.00 | a | 61.59 | a | 68.15 | 67.71 | 59.58 | 49.20 | a | 35.57 | a | 27.31 | 46.44 | |||||||||
1992 | 19.80 | a | 34.97 | 39.80 | a | 49.38 | 55.15 | 62.30 | 67.34 | 66.79 | 60.19 | a | 50.83 | a | 30.60 | 20.35 | a | 46.46 | ||||||||
1993 | 32.98 | c | 35.10 | c | 38.11 | 45.25 | 54.94 | 62.85 | 69.34 | b | 66.85 | 58.85 | 47.48 | a | 32.42 | 27.38 | c | 47.63 | ||||||||
1994 | 26.57 | a | 29.35 | a | 40.66 | b | 46.65 | 55.50 | 67.52 | a | 70.92 | 70.71 | 60.18 | 47.15 | 34.93 | a | 31.21 | c | 48.45 | |||||||
1995 | 27.08 | a | 39.14 | 40.69 | 43.73 | 52.32 | 61.72 | a | 68.33 | a | 71.24 | b | 61.10 | a | 48.06 | 38.78 | 28.58 | 48.40 | ||||||||
1996 | 28.63 | a | 36.52 | 37.33 | a | 47.23 | 60.10 | a | 66.82 | 71.34 | 68.34 | 57.48 | 47.81 | 36.67 | a | 30.32 | 49.05 | |||||||||
1997 | 23.87 | a | 33.68 | 41.50 | 43.27 | 56.90 | 63.69 | a | 68.32 | a | 68.23 | 63.57 | 46.78 | a | 35.55 | 23.58 | 47.41 | |||||||||
1998 | 30.73 | 31.93 | a | 38.60 | 42.72 | 54.79 | 62.10 | 70.92 | a | 68.50 | a | 64.47 | a | 49.13 | a | 38.97 | 28.87 | 48.48 | ||||||||
1999 | 31.21 | b | 33.20 | 42.33 | a | 43.45 | 53.08 | 62.37 | 68.87 | a | 65.84 | 58.67 | a | 48.60 | 38.96 | b | 25.22 | a | 47.65 | |||||||
2000 | 29.97 | b | 36.12 | a | 38.52 | 49.73 | 58.22 | a | 66.84 | a | 70.66 | 69.00 | 62.73 | 48.37 | a | 30.31 | a | 28.17 | a | 49.05 | ||||||
2001 | 24.47 | 33.06 | a | 38.36 | b | 48.21 | a | 57.98 | 66.97 | a | 71.25 | c | 67.47 | a | 62.07 | a | 50.32 | a | 38.07 | 23.18 | a | 48.45 | ||||
2002 | 25.85 | a | 29.56 | a | 36.06 | 49.93 | 55.82 | a | 67.37 | 71.18 | a | 67.93 | a | 61.10 | 47.20 | a | 36.48 | c | 27.98 | 48.04 | ||||||
2003 | 33.31 | b | 31.89 | a | 38.26 | 45.85 | 57.11 | 64.68 | 73.95 | 69.55 | a | 61.43 | 53.17 | a | 36.62 | b | 30.09 | d | 49.66 | |||||||
2004 | 29.21 | c | 27.00 | d | 44.00 | b | 45.55 | h | 56.02 | 64.66 | a | 69.10 | a | 67.18 | 59.35 | c | 49.91 | h | 37.12 | r | 26.89 | l | 52.06 | d | ||
2005 | 33.46 | e | 35.46 | 37.42 | 46.48 | 56.81 | 63.05 | b | 71.67 | a | 67.79 | 62.32 | e | 49.58 | f | 37.66 | a | 26.84 | b | 49.00 | a | |||||
2006 | 28.23 | a | 30.23 | 38.55 | 48.50 | a | 58.10 | a | 67.88 | b | 70.95 | 67.69 | b | 55.62 | 48.17 | b | 36.78 | 24.73 | a | 47.95 | ||||||
2007 | 21.21 | 30.77 | 41.58 | 47.65 | 55.83 | b | 65.67 | 71.27 | 70.00 | 61.62 | 49.16 | 38.45 | 27.29 | c | 48.37 | |||||||||||
2008 | 21.75 | c | 32.78 | f | 38.68 | 43.82 | 53.48 | 63.83 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.43 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.21 | 31.06 | 38.13 | 45.91 | 55.01 | 64.47 | 69.99 | 67.99 | 60.49 | 48.68 | 36.14 | 26.73 | 47.55 | |||||||||||||
S.D. | 4.74 | 3.83 | 2.88 | 2.61 | 2.25 | 2.34 | 1.43 | 1.64 | 2.18 | 2.00 | 2.38 | 3.69 | 1.20 | |||||||||||||
SKEW | 0.10 | -0.46 | -0.17 | -0.02 | 0.24 | -0.02 | -0.06 | -0.61 | -0.14 | -0.27 | -0.94 | -0.31 | -0.42 | |||||||||||||
MAX | 34.19 | 39.14 | 44.00 | 51.60 | 60.10 | 69.10 | 73.95 | 71.24 | 65.22 | 53.17 | 39.91 | 34.05 | 49.66 | |||||||||||||
MIN | 16.76 | 18.70 | 31.58 | 39.90 | 51.30 | 59.53 | 66.06 | 62.63 | 55.62 | 42.81 | 29.78 | 18.16 | 44.28 | |||||||||||||
YRS | 62 | 62 | 62 | 60 | 53 | 53 | 52 | 52 | 50 | 53 | 58 | 57 | 40 |