YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1916 | ----- | z | ----- | z | ----- | z | 50.70 | y | 51.55 | b | 59.17 | c | 60.82 | 63.79 | 58.88 | 49.08 | 39.60 | a | 36.90 | 52.48 | d | |||||
1917 | 35.67 | b | 37.93 | a | 40.27 | 46.53 | 52.43 | a | 54.31 | a | ----- | z | 66.32 | i | 59.53 | 54.02 | 48.67 | a | 45.19 | 47.46 | b | |||||
1918 | 42.67 | a | 39.46 | 43.27 | a | 49.15 | 51.76 | 61.60 | 64.18 | 63.34 | 61.95 | 53.22 | a | 44.70 | 39.55 | a | 51.24 | |||||||||
1919 | 40.10 | a | 40.48 | 44.56 | 50.31 | a | 52.36 | b | 55.45 | a | 62.85 | 62.91 | b | 58.50 | a | 49.08 | 42.93 | a | 38.57 | j | 50.87 | a | ||||
1920 | 38.77 | a | 39.93 | 43.26 | 45.56 | e | 49.10 | b | 56.15 | 63.47 | 64.40 | a | 57.02 | 49.29 | 44.04 | d | 41.13 | 49.34 | ||||||||
1921 | 39.09 | d | 42.07 | 44.15 | 46.40 | 52.44 | 59.18 | 61.42 | a | 62.50 | 55.77 | 52.43 | a | 44.85 | 37.25 | a | 49.80 | |||||||||
1922 | 34.65 | 37.20 | a | 40.05 | 45.43 | a | 53.26 | 61.07 | 62.90 | 60.62 | a | 60.00 | 51.68 | 41.45 | 34.31 | 48.55 | ||||||||||
1923 | 39.05 | 35.30 | 42.69 | 49.40 | 53.24 | b | 58.98 | 63.44 | 66.47 | 60.60 | a | 52.09 | b | 44.79 | a | 39.13 | e | 50.43 | ||||||||
1924 | 37.50 | c | 43.96 | b | 43.02 | a | 46.92 | 55.50 | b | 59.10 | a | 61.77 | c | 59.48 | 57.20 | c | 50.55 | a | 42.72 | 34.13 | 49.32 | |||||
1925 | 40.98 | a | 43.84 | 44.19 | d | 50.17 | 57.13 | a | 58.97 | m | 64.71 | 62.21 | c | 55.48 | d | 51.24 | b | 43.88 | 43.67 | b | 50.68 | a | ||||
1926 | 41.36 | f | 45.15 | a | 49.50 | 54.62 | 54.70 | d | 60.55 | 64.84 | 63.53 | 55.48 | 52.62 | b | 47.11 | g | 39.11 | c | 54.01 | b | ||||||
1927 | ----- | z | 39.31 | b | 42.30 | c | 46.57 | a | 49.96 | c | 60.05 | a | 63.74 | 65.87 | 59.77 | 50.31 | b | 44.48 | 35.02 | c | 50.67 | a | ||||
1928 | 39.81 | 40.56 | c | 46.26 | 47.35 | ----- | z | 65.42 | ----- | z | ----- | z | 58.93 | a | 50.95 | b | 44.12 | 36.98 | c | 47.82 | c | |||||
1929 | 34.41 | d | 33.04 | 44.20 | d | 45.25 | 52.47 | a | 55.08 | x | 61.04 | h | 63.31 | 58.97 | 52.65 | 40.97 | a | 41.50 | a | 46.67 | b | |||||
1930 | 27.75 | a | 42.36 | c | 44.31 | 51.07 | 51.23 | 56.75 | 60.94 | 64.29 | 57.92 | 48.85 | g | 44.81 | d | 39.87 | 49.21 | a | ||||||||
1931 | 45.94 | e | 42.78 | c | 46.19 | d | 51.16 | e | 57.00 | c | 61.96 | d | 64.72 | b | 63.02 | g | 59.38 | j | ----- | z | ----- | z | 37.38 | w | 52.82 | e |
1932 | 38.83 | p | 38.00 | t | ----- | z | ----- | z | 50.67 | y | 58.43 | p | 58.93 | x | 60.42 | y | 59.29 | a | ----- | z | ----- | z | ----- | z | 59.29 | k |
1933 | ----- | z | 36.34 | 43.74 | 48.21 | d | 51.13 | 56.97 | a | 62.55 | 66.18 | 56.40 | 51.81 | 45.28 | 43.30 | a | 51.08 | a | ||||||||
1934 | 44.10 | 46.68 | 49.95 | 55.08 | 57.10 | b | 59.83 | 62.33 | a | 65.55 | b | 58.23 | b | 53.21 | 48.17 | f | 41.34 | 53.95 | a | |||||||
1935 | 39.09 | b | 43.09 | 41.67 | a | 48.22 | a | 54.00 | 59.03 | 62.34 | 62.87 | 60.81 | a | 50.15 | a | 40.43 | ----- | z | 51.06 | a | ||||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.27 | a | 42.22 | 42.92 | y | 48.24 | j | |
1937 | 28.85 | g | 39.63 | a | 46.85 | 47.20 | c | 54.82 | c | 60.73 | 64.37 | 62.27 | 60.45 | 55.14 | b | 46.93 | b | 41.38 | b | 52.71 | a | |||||
1938 | 39.84 | f | 42.10 | b | 44.16 | 51.07 | 55.73 | 61.90 | d | 67.38 | a | 63.35 | a | 62.20 | y | 52.94 | e | 41.88 | b | 40.29 | b | 52.08 | b | |||
1939 | 42.12 | g | 39.07 | a | 45.81 | e | 51.77 | 55.60 | a | 58.28 | a | 64.05 | a | 66.11 | 60.96 | d | 53.27 | e | 46.52 | b | 44.35 | a | 53.25 | a | ||
1940 | 41.64 | c | 44.02 | 48.21 | 51.93 | 58.27 | a | 63.17 | 64.76 | 66.12 | a | 62.57 | c | 54.88 | b | 41.60 | a | 41.81 | 53.25 | |||||||
1941 | 41.21 | b | 44.50 | b | 50.58 | 52.67 | 55.14 | b | 59.80 | 69.08 | 65.10 | 58.28 | a | 53.15 | a | 46.65 | 41.27 | 53.12 | ||||||||
1942 | 37.77 | 41.16 | f | ----- | z | ----- | z | 53.38 | f | 57.74 | a | 65.47 | 67.13 | a | 60.90 | a | 53.48 | 42.62 | b | 42.08 | 53.40 | d | ||||
1943 | 33.48 | b | 42.93 | a | 42.76 | 51.90 | 52.26 | 58.78 | 63.37 | 62.50 | 62.15 | 51.88 | a | 44.65 | d | 38.45 | a | 50.43 | ||||||||
1944 | 40.02 | a | 40.97 | 43.00 | 48.62 | a | 53.06 | 58.18 | 63.93 | a | 63.10 | 63.11 | c | 54.79 | 43.63 | 36.53 | 50.75 | |||||||||
1945 | 40.95 | 42.74 | e | 41.68 | a | 46.60 | a | 55.31 | 56.90 | a | 63.80 | c | 62.81 | b | 57.30 | e | 51.17 | e | 42.25 | d | ----- | z | 51.05 | a | ||
1946 | 39.94 | f | 42.00 | 44.03 | 47.93 | b | 56.16 | b | 57.29 | a | 62.52 | 63.47 | 58.57 | 49.59 | c | 41.33 | c | 39.19 | o | 52.29 | b | |||||
1947 | ----- | z | 42.13 | m | 46.23 | i | ----- | z | 58.07 | c | 58.54 | e | 61.83 | h | 62.25 | m | 59.58 | 52.69 | 44.26 | e | 41.58 | g | 54.63 | g | ||
1948 | 39.28 | d | 38.64 | ----- | z | ----- | z | ----- | z | 62.95 | b | 61.48 | d | 61.18 | a | 58.53 | a | 50.07 | b | 42.47 | 37.12 | c | 50.19 | c | ||
1949 | 29.32 | 37.68 | 45.47 | 50.84 | a | 57.18 | 58.78 | 62.15 | a | 62.10 | a | 61.23 | 48.11 | c | 49.86 | a | 38.34 | f | 51.16 | a | ||||||
1950 | 27.11 | 39.55 | 42.94 | 46.50 | 51.88 | b | 58.27 | s | 62.60 | 64.27 | 56.35 | 48.05 | a | 42.52 | 44.87 | 47.88 | a | |||||||||
1951 | 38.03 | 39.21 | 36.53 | 50.17 | j | 54.35 | a | 61.52 | 64.05 | 63.66 | 60.50 | a | 51.65 | 44.17 | 37.05 | 50.07 | a | |||||||||
1952 | 36.44 | 41.07 | 43.00 | 48.75 | 53.92 | 57.27 | 63.82 | 63.61 | 60.82 | 54.50 | a | 41.05 | 41.13 | 50.45 | ||||||||||||
1953 | 46.13 | 42.11 | a | 44.13 | 47.97 | 53.39 | 55.67 | 62.48 | 63.93 | a | 58.65 | 53.00 | 47.05 | a | 42.81 | 51.44 | ||||||||||
1954 | 36.45 | a | 42.71 | 40.58 | 46.03 | 53.35 | ----- | z | 59.39 | 60.90 | a | 58.37 | 50.08 | 48.40 | 40.10 | 48.76 | a | |||||||||
1955 | 39.35 | a | 39.55 | 39.95 | 44.55 | 49.15 | 58.83 | 60.13 | 61.31 | 58.15 | 49.85 | 40.88 | 39.81 | 48.46 | ||||||||||||
1956 | 39.58 | 36.45 | a | 42.32 | 50.75 | 57.20 | a | 56.41 | a | 66.56 | 63.31 | 57.82 | 50.92 | 41.26 | a | 40.52 | 50.26 | |||||||||
1957 | 32.24 | 39.70 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.03 | a | ----- | z | ----- | z | ----- | z | 44.99 | i | ||
1958 | 41.69 | 47.55 | 43.81 | 49.03 | 59.76 | 63.03 | 68.48 | 66.19 | 58.70 | b | 53.84 | 43.55 | 45.16 | 53.40 | ||||||||||||
1959 | 40.44 | 40.13 | a | 43.60 | 49.07 | 51.70 | a | 57.53 | a | 65.47 | 61.24 | b | 56.83 | 52.68 | 45.07 | 40.84 | 50.38 | |||||||||
1960 | 38.37 | 42.12 | 43.90 | 49.03 | 51.07 | a | 57.85 | 65.47 | 62.19 | 57.14 | a | 52.88 | a | 42.90 | 39.05 | a | 50.16 | |||||||||
1961 | 44.40 | 44.56 | a | 45.56 | 47.07 | 52.97 | 62.00 | c | 65.92 | 67.21 | 58.20 | 49.63 | 41.53 | 39.85 | 51.58 | |||||||||||
1962 | 38.94 | 43.27 | 42.85 | 50.15 | 50.85 | 57.45 | 62.22 | a | 61.91 | b | 58.73 | 52.53 | a | 46.87 | 43.19 | 50.75 | ||||||||||
1963 | 34.32 | 47.77 | 43.79 | 48.28 | 54.40 | 56.79 | a | 60.48 | 62.95 | 63.00 | 52.23 | 45.50 | 41.48 | 50.92 | ||||||||||||
1964 | 41.55 | 41.71 | 43.76 | 46.61 | b | 50.93 | a | 57.27 | ----- | z | 61.15 | 57.55 | 52.02 | 42.80 | 36.34 | 48.33 | a | |||||||||
1965 | 40.06 | 42.95 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.51 | j | ||
1966 | 40.27 | 40.11 | n | 43.87 | 49.30 | 53.03 | 57.03 | a | 61.21 | 62.29 | 60.15 | 50.74 | 45.78 | a | 43.50 | a | 51.56 | a | ||||||||
1967 | 42.10 | a | 42.23 | 42.03 | 45.58 | 54.27 | 61.70 | 62.77 | 67.34 | 61.64 | a | 52.16 | 44.57 | b | 38.55 | 51.25 | ||||||||||
1968 | 39.88 | a | 44.34 | 46.54 | c | 46.88 | 53.92 | a | 57.68 | 63.95 | 60.42 | 58.13 | 49.58 | 44.93 | 37.15 | a | 50.28 | |||||||||
1969 | 31.98 | 38.68 | 44.18 | a | 46.98 | a | 55.56 | 62.43 | 61.65 | a | 58.77 | 58.08 | 49.10 | 44.20 | 41.71 | b | 49.44 | |||||||||
1970 | 39.16 | 44.04 | 43.97 | 45.28 | 51.74 | 59.92 | 62.85 | 61.27 | 54.73 | 48.85 | 44.62 | 38.15 | 49.55 | |||||||||||||
1971 | 39.58 | 40.74 | a | 40.90 | 46.95 | 53.55 | 54.62 | 62.84 | 64.60 | 56.97 | 49.32 | 44.87 | 37.40 | 49.36 | ||||||||||||
1972 | 36.15 | 40.60 | 45.39 | 44.27 | 55.98 | a | 58.47 | 62.44 | 64.89 | 55.68 | 49.30 | a | 45.26 | a | 36.18 | 49.55 | ||||||||||
1973 | 37.02 | 41.68 | 44.63 | 48.08 | 53.63 | 57.50 | 62.27 | 59.29 | 58.92 | 50.31 | 42.50 | 43.27 | 49.92 | |||||||||||||
1974 | 35.73 | 40.59 | 43.50 | 47.98 | 50.47 | 58.97 | 60.63 | 65.03 | 61.55 | 50.76 | 45.23 | 41.77 | a | 50.18 | ||||||||||||
1975 | 39.58 | 40.45 | 42.32 | 44.17 | a | 53.02 | 56.95 | 62.39 | 61.27 | 58.12 | a | 50.95 | 44.40 | 40.40 | 49.50 | |||||||||||
1976 | 41.20 | a | 40.10 | 41.40 | 46.62 | 52.31 | 55.38 | 61.06 | 60.44 | 60.07 | 52.53 | a | 45.47 | 41.27 | a | 49.82 | ||||||||||
1977 | 36.81 | 44.12 | 42.74 | 49.47 | 50.45 | 59.18 | 60.19 | 66.85 | 57.82 | 50.42 | 42.08 | 40.95 | 50.09 | |||||||||||||
1978 | 42.18 | 45.50 | a | 47.66 | 49.68 | 52.42 | 62.33 | 64.45 | 64.78 | o | 58.17 | 52.53 | ----- | z | 34.43 | a | 50.94 | b | ||||||||
1979 | 32.27 | 39.84 | 47.19 | 49.23 | 54.66 | 58.67 | a | 63.18 | c | 64.03 | 60.92 | 53.00 | 41.78 | 41.56 | 50.53 | |||||||||||
1980 | 33.92 | 42.10 | 43.71 | 50.02 | 53.56 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.05 | s | 45.09 | c | 44.73 | f | |||||
1981 | 42.73 | 44.11 | 48.06 | 49.60 | 55.18 | 58.62 | 63.73 | 66.92 | 60.87 | 49.90 | 46.58 | 41.02 | 52.28 | |||||||||||||
1982 | 38.66 | 41.80 | 44.02 | 46.60 | 55.79 | 63.42 | 63.39 | 64.35 | 60.97 | 52.95 | 41.83 | a | 39.95 | 51.14 | ||||||||||||
1983 | 44.61 | 45.80 | 48.19 | 50.45 | 59.34 | 59.77 | b | 63.95 | a | 65.43 | c | 57.55 | 50.74 | 45.90 | 34.32 | 52.17 | ||||||||||
1984 | 41.94 | 44.25 | m | 48.77 | 46.77 | 52.00 | 57.87 | 64.37 | 62.25 | g | 57.87 | 48.10 | 43.03 | 35.52 | 49.62 | b | ||||||||||
1985 | 36.50 | 38.88 | 42.42 | 50.27 | 54.32 | 58.98 | 67.87 | 63.24 | 56.63 | 49.32 | 34.87 | 34.90 | 49.02 | |||||||||||||
1986 | 43.82 | 41.18 | 50.02 | 47.20 | 54.89 | 62.25 | 61.16 | 68.24 | 57.53 | 53.76 | 45.68 | 40.05 | 52.15 | |||||||||||||
1987 | 39.97 | 45.00 | 47.34 | 51.88 | 57.65 | 62.08 | 63.24 | 65.61 | 61.45 | 53.50 | 47.32 | 38.19 | 52.77 | |||||||||||||
1988 | 39.15 | 44.22 | 45.16 | 51.05 | 54.44 | 58.03 | 63.26 | 63.71 | 59.42 | 54.73 | 44.18 | 40.34 | 51.47 | |||||||||||||
1989 | 39.96 | c | 34.33 | a | 43.58 | 53.62 | 55.23 | 61.00 | 62.56 | 62.87 | 60.83 | 52.60 | 46.55 | 42.13 | 51.27 | |||||||||||
1990 | 41.73 | 38.54 | ----- | z | 50.63 | 52.82 | 58.25 | 66.26 | 65.16 | 60.18 | 49.81 | 46.43 | a | 35.61 | h | 52.98 | b | |||||||||
1991 | 38.17 | d | 46.23 | 43.89 | 48.88 | a | 52.76 | 57.22 | 65.68 | 64.56 | 59.68 | 49.26 | 44.78 | 42.06 | 51.10 | |||||||||||
1992 | 42.73 | 46.59 | 49.26 | 50.90 | 58.24 | b | 63.52 | 65.55 | a | 65.92 | 58.85 | 52.80 | a | 45.19 | a | 38.25 | a | 53.15 | ||||||||
1993 | 35.03 | a | 38.86 | 46.00 | 50.07 | 58.85 | a | 59.78 | 61.53 | 64.32 | 60.29 | a | 53.82 | 40.18 | 40.70 | a | 50.79 | |||||||||
1994 | 44.05 | 39.72 | a | 47.79 | 52.23 | 56.17 | b | 58.18 | 65.36 | b | 64.76 | 62.73 | 50.65 | a | 40.22 | 39.55 | a | 51.79 | ||||||||
1995 | 42.15 | 44.59 | a | 45.73 | 49.07 | 57.82 | 60.83 | ----- | z | 61.44 | 62.98 | 52.12 | a | 47.78 | a | 41.35 | 51.44 | a | ||||||||
1996 | 39.17 | b | 41.10 | 45.94 | 50.83 | 51.43 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.07 | c | 39.13 | 44.38 | e | ||||
1997 | 40.88 | a | 41.91 | 44.52 | 48.35 | 57.52 | 57.70 | 63.31 | 64.92 | m | 61.05 | 50.77 | 47.69 | a | 40.77 | 50.41 | a | |||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.84 | 41.49 | 44.43 | 48.78 | 54.08 | 59.15 | 63.42 | 63.62 | 59.18 | 51.57 | 43.99 | 39.91 | 50.74 | |||||||||||||
S.D. | 3.91 | 2.99 | 2.63 | 2.40 | 2.49 | 2.34 | 1.98 | 2.12 | 2.02 | 1.83 | 2.47 | 2.82 | 1.26 | |||||||||||||
SKEW | -0.83 | -0.27 | 0.17 | 0.28 | 0.26 | 0.35 | 0.57 | -0.05 | 0.07 | -0.03 | -0.46 | -0.25 | 0.42 | |||||||||||||
MAX | 46.13 | 47.77 | 50.58 | 55.08 | 59.76 | 65.42 | 69.08 | 68.24 | 63.11 | 55.14 | 49.86 | 45.19 | 53.40 | |||||||||||||
MIN | 27.11 | 33.04 | 36.53 | 44.17 | 49.10 | 54.31 | 59.39 | 58.77 | 54.73 | 48.05 | 34.87 | 34.13 | 48.46 | |||||||||||||
YRS | 71 | 75 | 73 | 73 | 75 | 72 | 70 | 69 | 76 | 75 | 74 | 70 | 44 |