YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1906 | ----- | z | 38.38 | 44.45 | 52.38 | 61.82 | 72.47 | 69.85 | 66.85 | 62.05 | 52.73 | a | 40.65 | 38.93 | b | 54.60 | a | |||||||||
1907 | 38.04 | d | 42.82 | 48.05 | 52.07 | 53.34 | 63.40 | 69.63 | 66.58 | 62.30 | 51.38 | a | 38.47 | 37.04 | g | 53.28 | a | |||||||||
1908 | 35.32 | 38.00 | 47.69 | 50.86 | b | 56.28 | f | 66.58 | 68.69 | 67.45 | 60.68 | 48.18 | a | 39.23 | 35.82 | 50.77 | a | |||||||||
1909 | 40.48 | 37.45 | 40.85 | 51.40 | 58.10 | 69.55 | 72.55 | a | 67.98 | 60.90 | 54.19 | 43.40 | 26.55 | a | 51.95 | |||||||||||
1910 | 35.63 | 35.46 | 47.53 | 51.27 | 61.13 | 70.65 | 73.18 | 70.69 | 65.53 | 52.27 | 45.32 | 36.75 | a | 53.78 | ||||||||||||
1911 | 41.24 | 35.98 | a | 46.45 | 50.70 | 58.87 | 67.23 | 67.37 | 69.50 | 64.88 | 50.82 | 38.73 | 26.77 | 51.55 | ||||||||||||
1912 | 35.18 | 35.95 | 42.45 | 44.93 | a | 58.66 | 65.90 | 70.45 | 68.05 | 60.27 | 50.13 | a | 40.48 | 27.02 | a | 49.96 | ||||||||||
1913 | 28.68 | a | 33.54 | 40.87 | 49.67 | 61.69 | 65.78 | 72.23 | 68.34 | 59.52 | 53.27 | 45.18 | 29.66 | 50.70 | ||||||||||||
1914 | 39.74 | 38.46 | 45.13 | a | 53.50 | a | 62.27 | 72.68 | 65.63 | 68.26 | 63.85 | 53.95 | 43.60 | 30.37 | 53.12 | |||||||||||
1915 | 31.26 | 37.04 | 38.89 | 48.18 | ----- | z | 73.70 | 72.85 | ----- | z | ----- | z | ----- | z | 42.09 | n | 37.15 | a | 48.44 | e | ||||||
1916 | 36.31 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | 29.69 | g | 38.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.39 | k | |
1918 | ----- | z | 39.32 | f | 45.43 | h | 49.36 | i | 57.61 | c | 64.65 | q | 70.67 | j | ----- | z | 62.45 | j | 58.56 | v | 32.33 | u | 27.96 | e | 42.78 | j |
1919 | 26.64 | i | 32.05 | h | 41.38 | j | 47.88 | m | 58.64 | m | 65.41 | h | 68.48 | j | 68.42 | g | 65.75 | r | 49.83 | h | 41.80 | o | 36.05 | j | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | 46.92 | j | 58.45 | k | 65.15 | m | ----- | z | ----- | z | 61.42 | f | 53.60 | f | 44.15 | f | 35.42 | g | ----- | z |
1921 | 34.93 | h | 34.79 | g | 44.46 | e | 46.08 | e | 53.79 | g | 64.54 | g | 68.00 | i | 65.40 | e | 61.46 | f | 50.19 | g | 37.04 | g | 33.52 | f | 51.98 | i |
1922 | 26.76 | f | 36.86 | f | 31.79 | g | 41.48 | j | 58.55 | k | 69.90 | e | 72.77 | g | 70.76 | f | 64.46 | f | 50.79 | e | ----- | z | 32.40 | g | 60.34 | j |
1923 | 26.63 | h | ----- | z | 36.70 | d | 47.46 | e | ----- | z | 70.09 | g | 73.61 | m | 67.10 | f | 58.75 | 48.76 | ----- | z | 30.39 | m | 47.92 | h | ||
1924 | 31.29 | 38.66 | 39.40 | a | 49.00 | 58.75 | a | 72.18 | 69.31 | 69.35 | a | 62.05 | 52.83 | a | 45.31 | a | 32.85 | 51.75 | ||||||||
1925 | 33.20 | i | 41.16 | 46.83 | a | ----- | z | 61.12 | a | 69.97 | 71.47 | a | 66.81 | b | ----- | z | ----- | z | 40.50 | a | ----- | z | 56.84 | e | ||
1926 | 27.47 | ----- | z | 41.91 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.94 | v | 57.37 | 48.10 | 32.15 | 41.40 | g | ||||
1927 | 40.50 | 41.43 | 41.00 | v | 48.43 | 58.00 | e | 64.11 | c | 69.14 | b | 64.10 | a | 58.46 | d | 50.06 | 46.77 | o | 26.04 | f | 54.92 | c | ||||
1928 | 32.64 | b | 32.67 | h | 46.18 | c | 47.85 | m | 56.95 | c | 65.05 | i | 71.43 | i | ----- | z | 59.33 | x | 54.69 | r | 38.55 | s | 29.92 | g | 45.25 | i |
1929 | 34.29 | b | 32.75 | b | 40.84 | f | 47.83 | o | 57.07 | j | ----- | z | ----- | z | 65.00 | k | 62.39 | u | ----- | z | ----- | z | ----- | z | 33.52 | j |
1930 | 32.97 | a | 37.96 | a | 37.24 | 49.48 | b | 51.13 | 66.02 | b | 67.77 | p | 69.74 | 63.48 | b | 52.08 | a | 36.93 | c | 29.68 | a | 47.88 | a | |||
1931 | 29.83 | a | 36.54 | a | 42.60 | e | 43.13 | k | 59.35 | 69.75 | 72.15 | a | 68.07 | a | 64.63 | 50.61 | 36.24 | c | 23.75 | g | 52.98 | b | ||||
1932 | 26.23 | c | 39.23 | a | 34.79 | c | ----- | z | ----- | z | ----- | z | ----- | z | 71.25 | e | ----- | z | ----- | z | ----- | z | ----- | z | 42.88 | h |
1933 | 28.75 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.89 | v | ----- | z |
1934 | ----- | z | ----- | z | 48.04 | d | 54.59 | b | 63.19 | g | 66.00 | f | 73.39 | l | 69.84 | ----- | z | ----- | z | ----- | z | ----- | z | 57.49 | i | |
1935 | ----- | z | 39.11 | e | 47.94 | 54.27 | 57.36 | b | 71.13 | 74.52 | 69.60 | 63.73 | d | 58.68 | 46.59 | a | 32.06 | 55.91 | a | |||||||
1936 | 31.42 | 39.16 | 45.92 | 54.92 | 63.08 | 73.47 | 72.75 | c | 73.03 | a | 64.62 | a | 52.60 | 43.78 | c | 40.02 | 54.56 | |||||||||
1937 | 24.07 | a | 38.98 | 39.35 | 53.33 | a | 60.82 | 69.05 | b | 70.76 | 70.08 | 61.48 | a | 51.56 | 40.87 | 35.00 | b | 51.28 | ||||||||
1938 | 32.50 | 36.57 | a | 38.37 | 46.55 | 54.44 | 67.97 | 68.18 | 69.42 | 59.37 | 52.13 | 34.48 | 34.13 | a | 49.51 | |||||||||||
1939 | 30.61 | 31.56 | a | 41.10 | 50.18 | 59.23 | 75.62 | 73.95 | 71.61 | 66.57 | 53.37 | 41.78 | 40.44 | 53.00 | ||||||||||||
1940 | 36.83 | a | 39.63 | b | 46.58 | 51.17 | a | 60.07 | a | 70.30 | 73.23 | 69.77 | 66.57 | 59.03 | 44.82 | 42.44 | 55.04 | |||||||||
1941 | 35.92 | 42.04 | 43.08 | 47.52 | a | 63.73 | a | 66.93 | 70.50 | 69.63 | 67.47 | a | 55.50 | a | 43.80 | ----- | z | 55.10 | a | |||||||
1942 | 37.63 | 34.23 | 41.92 | 51.08 | 58.98 | 70.07 | 71.03 | 69.03 | 63.08 | 53.47 | a | 46.56 | f | 39.68 | 53.66 | a | ||||||||||
1943 | 37.05 | 41.12 | 44.45 | 54.83 | 61.69 | 68.62 | a | 71.23 | 71.55 | 63.75 | 52.38 | a | 41.41 | a | 31.85 | 53.33 | ||||||||||
1944 | 29.79 | 37.50 | 42.22 | a | 48.35 | d | 59.02 | 67.75 | 70.87 | 70.68 | 63.57 | 54.13 | 39.98 | 35.18 | 51.59 | |||||||||||
1945 | 34.95 | 41.96 | 41.53 | 49.47 | 61.68 | a | 66.67 | 71.35 | 70.32 | 65.53 | 55.10 | 44.07 | 33.74 | 53.03 | ||||||||||||
1946 | 29.48 | 37.46 | 44.92 | a | 56.72 | 58.15 | 71.28 | 70.94 | 66.03 | 66.10 | d | 52.21 | 38.82 | b | 39.23 | 52.61 | ||||||||||
1947 | 31.63 | a | 39.84 | 44.07 | d | 50.86 | a | 61.57 | d | 68.20 | 73.97 | 68.56 | 66.06 | c | 55.77 | e | 37.69 | a | 32.19 | 52.54 | ||||||
1948 | 36.05 | b | 36.17 | b | 38.58 | a | 53.78 | a | 59.74 | 67.13 | 71.77 | a | 69.97 | 65.30 | 52.19 | 39.33 | a | 38.29 | 52.36 | |||||||
1949 | 27.80 | a | 35.59 | a | 43.80 | a | 50.90 | 59.00 | e | 67.38 | 71.21 | 69.19 | e | 65.38 | b | 49.96 | h | 47.50 | d | 33.21 | 51.91 | a | ||||
1950 | 36.57 | a | 40.89 | a | 45.02 | 53.27 | d | 60.43 | d | 71.16 | b | 71.48 | b | 71.73 | c | 62.97 | k | 60.43 | c | 45.38 | e | 41.40 | b | 54.34 | a | |
1951 | 36.02 | a | 37.15 | b | 42.56 | d | 47.98 | e | 58.87 | h | 65.08 | d | 72.47 | 68.87 | e | 62.17 | g | 53.81 | d | 41.36 | i | 33.64 | f | 52.99 | d | |
1952 | 39.60 | e | 37.19 | 38.59 | d | 50.40 | 60.44 | f | 69.48 | g | 72.26 | 75.39 | c | 66.90 | ----- | z | 31.81 | f | 34.31 | 51.83 | d | |||||
1953 | 42.24 | l | ----- | z | 41.90 | u | 50.79 | p | 58.46 | f | 73.65 | g | 75.17 | g | ----- | z | 66.42 | f | 53.82 | i | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | 41.25 | f | 41.60 | k | 56.43 | b | 61.29 | c | 71.81 | i | 73.23 | e | 67.59 | h | 64.00 | j | 54.19 | j | 44.34 | e | 31.61 | l | 58.82 | h |
1955 | 31.22 | b | 32.24 | a | 42.83 | h | 49.29 | p | 57.67 | b | 68.02 | 69.00 | d | 70.27 | t | 64.97 | l | 56.08 | f | 44.34 | n | 40.98 | k | 51.63 | g | |
1956 | 39.35 | h | 21.44 | u | 45.86 | x | 49.22 | 63.97 | n | 70.82 | 71.13 | a | 69.59 | o | 67.50 | k | 54.61 | q | 38.98 | b | 36.31 | 53.29 | g | |||
1957 | 38.50 | b | 46.64 | f | 45.16 | 49.55 | a | 56.63 | e | 69.77 | b | 73.34 | c | 68.40 | f | 64.76 | k | 53.85 | e | 38.85 | t | 40.15 | n | 55.26 | e | |
1958 | 32.48 | e | 39.81 | g | 36.60 | j | 49.60 | i | 61.77 | 72.42 | 73.76 | 71.80 | h | 63.06 | c | 50.59 | h | 38.27 | h | 40.95 | i | 60.70 | g | |||
1959 | 34.61 | 36.19 | o | 41.75 | c | 53.91 | h | 60.58 | 71.20 | 73.30 | c | 68.55 | 64.72 | 53.97 | a | 40.13 | 32.98 | 54.18 | b | |||||||
1960 | 28.69 | 32.48 | a | 46.85 | 52.68 | 58.39 | 70.65 | 72.37 | 72.56 | 66.87 | 53.03 | a | 43.43 | 30.32 | a | 52.36 | ||||||||||
1961 | 32.77 | a | 37.27 | 43.70 | a | 51.28 | 60.67 | a | 71.79 | a | 71.81 | 69.00 | 60.54 | b | 52.58 | a | 36.81 | a | 32.70 | a | 51.74 | |||||
1962 | 30.60 | a | 41.16 | 40.82 | c | 54.09 | a | 59.82 | a | 66.91 | a | 66.78 | a | 68.00 | 61.26 | a | 51.65 | 43.12 | 36.32 | 51.71 | ||||||
1963 | 28.34 | 36.39 | 41.23 | 53.33 | a | 62.79 | b | 67.65 | 74.21 | 69.11 | 64.20 | 55.68 | 43.47 | 31.65 | 52.34 | |||||||||||
1964 | 27.23 | 28.03 | 39.97 | 48.13 | 59.77 | ----- | z | 72.19 | 68.03 | 63.18 | 55.58 | 40.88 | a | 35.60 | 48.96 | a | ||||||||||
1965 | 35.65 | a | 33.36 | 37.52 | 51.88 | a | 58.31 | 65.60 | 71.87 | 68.24 | 59.93 | 54.60 | 45.92 | 35.76 | d | 51.55 | ||||||||||
1966 | 27.72 | a | 30.95 | 43.85 | 51.88 | 61.39 | 67.47 | 69.71 | 68.32 | 62.98 | 52.37 | 47.10 | d | 34.15 | 51.49 | |||||||||||
1967 | 32.15 | a | 38.56 | a | 48.35 | 51.68 | 58.10 | 65.55 | 71.16 | 67.63 | 62.03 | 55.37 | 45.88 | b | 31.10 | 52.30 | ||||||||||
1968 | 32.90 | 39.38 | 41.29 | 47.68 | 58.69 | 69.60 | 70.27 | 66.53 | 62.85 | 55.79 | 41.70 | 32.77 | 51.62 | |||||||||||||
1969 | 39.47 | 35.93 | a | 36.71 | 52.22 | 59.27 | 66.98 | 72.71 | 71.03 | 63.75 | 51.06 | 38.80 | 36.15 | 52.01 | ||||||||||||
1970 | 28.85 | h | ----- | z | 40.59 | c | 47.53 | 60.65 | 65.56 | d | 70.15 | a | 69.39 | i | 62.77 | d | 50.40 | 47.31 | f | 39.08 | k | 56.81 | e | |||
1971 | 34.45 | c | 37.88 | 48.00 | a | 48.88 | a | 57.39 | ----- | z | ----- | z | ----- | z | 62.73 | 50.81 | 44.07 | ----- | z | 48.02 | d | |||||
1972 | 31.12 | a | 38.34 | 50.31 | 54.30 | j | 58.47 | a | 66.12 | 71.30 | c | 69.08 | a | 64.95 | 56.10 | a | 40.53 | 34.70 | a | 52.82 | a | |||||
1973 | 29.58 | a | 32.21 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.27 | 38.71 | 36.69 | h | |||
1974 | 34.71 | 36.52 | 49.73 | a | 52.08 | 64.08 | a | 72.84 | a | 71.18 | i | 67.32 | 60.62 | a | 52.15 | 42.98 | 32.85 | g | 53.30 | b | ||||||
1975 | 36.75 | k | 39.82 | i | 44.71 | g | 47.78 | 56.85 | 67.73 | 70.03 | b | 68.45 | 61.27 | f | 54.88 | a | 41.21 | a | 36.79 | j | 58.14 | e | ||||
1976 | 36.27 | g | 43.98 | c | 44.33 | a | 52.20 | c | 60.98 | a | 68.25 | h | 71.75 | e | 69.05 | a | 62.79 | d | 50.47 | a | 38.63 | c | 34.09 | h | 54.91 | c |
1977 | 34.56 | m | 39.32 | i | 38.58 | k | 51.07 | b | 60.59 | c | 69.60 | e | 71.05 | a | 72.16 | 66.41 | a | 55.52 | 45.61 | b | 43.04 | f | 61.50 | d | ||
1978 | 37.85 | g | 38.42 | i | 46.92 | e | 54.68 | b | 59.50 | d | 70.80 | c | 73.78 | a | 69.62 | c | ----- | z | 56.98 | b | 44.06 | c | ----- | z | 59.54 | d |
1979 | 32.00 | d | 37.23 | 43.21 | c | 51.12 | a | 57.10 | a | 66.84 | b | 72.34 | c | 68.36 | b | 66.04 | d | 58.89 | 39.07 | b | 39.12 | f | 53.84 | a | ||
1980 | 41.25 | g | 41.43 | a | 43.22 | b | 49.78 | 59.23 | 73.00 | a | 75.60 | 71.23 | a | 65.32 | 52.69 | 41.62 | b | 40.54 | d | 55.79 | a | |||||
1981 | 38.05 | b | 42.13 | a | 43.33 | a | 55.08 | 61.22 | b | 72.84 | b | 71.47 | 68.98 | 64.32 | 53.97 | 47.66 | b | 40.40 | f | 56.28 | a | |||||
1982 | 36.43 | d | 38.75 | b | 44.70 | a | 53.57 | c | 59.25 | e | 68.41 | b | 73.29 | c | 69.55 | b | 64.92 | e | 52.68 | i | 44.05 | i | 37.67 | m | 56.54 | c |
1983 | 37.05 | k | 39.00 | l | 46.08 | k | 47.72 | g | 57.45 | c | 68.21 | d | 72.82 | 70.11 | 67.79 | a | 54.62 | f | 45.42 | f | 39.52 | h | 67.28 | g | ||
1984 | 34.15 | k | 40.05 | i | 44.54 | f | 50.31 | a | 65.61 | c | 68.12 | b | 72.84 | 69.75 | c | 65.40 | e | 50.45 | a | 44.29 | b | 36.93 | c | 58.19 | c | |
1985 | 32.95 | i | 37.03 | i | 46.98 | j | 54.59 | b | 60.88 | a | 70.74 | c | ----- | z | 71.68 | 62.16 | h | 54.15 | 46.60 | a | 38.45 | b | 56.73 | e | ||
1986 | 42.06 | o | 45.30 | h | 47.77 | k | 55.05 | b | 60.88 | a | 68.13 | c | 70.18 | a | 71.25 | a | 61.03 | l | 52.05 | l | 42.07 | o | 35.47 | p | 65.10 | g |
1987 | 37.41 | t | 38.22 | j | 41.50 | h | 50.98 | f | 58.50 | e | 68.85 | f | 73.33 | g | 69.43 | b | 64.15 | m | 59.50 | p | 45.77 | q | ----- | z | 63.97 | j |
1988 | 33.67 | m | 39.26 | j | 46.03 | p | 48.81 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.17 | 35.33 | e | 43.10 | i | |
1989 | 34.95 | 41.56 | b | 51.77 | 58.35 | 67.40 | 71.20 | 73.55 | a | 70.69 | 65.12 | b | 55.08 | 45.40 | a | 36.83 | b | 55.99 | ||||||||
1990 | 36.32 | l | 41.53 | i | 47.16 | i | 53.58 | 61.24 | 75.07 | 70.60 | f | 67.72 | f | 66.62 | a | 51.98 | e | 41.47 | a | 31.69 | g | 58.33 | f | |||
1991 | 31.76 | 38.75 | 40.66 | 50.67 | 61.74 | 68.45 | a | 71.08 | 69.57 | a | 62.83 | a | 55.48 | b | 41.93 | g | 32.67 | a | 53.06 | a | ||||||
1992 | 30.83 | m | 37.34 | a | 43.58 | 53.52 | a | 56.79 | 67.02 | a | 72.37 | 70.44 | 66.67 | a | 60.37 | 38.35 | 29.11 | m | 56.64 | b | ||||||
1993 | 37.64 | m | 37.25 | j | 45.95 | l | 51.31 | i | 60.21 | n | 65.78 | n | 69.71 | g | 61.61 | 56.28 | a | 48.76 | j | ----- | z | ----- | z | 58.94 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.41 | 37.58 | 43.30 | 51.28 | 59.68 | 69.12 | 71.52 | 69.20 | 63.56 | 53.57 | 42.30 | 34.59 | 52.31 | |||||||||||||
S.D. | 4.03 | 3.22 | 3.65 | 2.78 | 2.58 | 2.70 | 1.88 | 2.10 | 2.52 | 2.67 | 3.27 | 3.90 | 1.39 | |||||||||||||
SKEW | -0.02 | -0.56 | -0.04 | 0.10 | -0.20 | 0.24 | -0.70 | -0.49 | -0.58 | 0.59 | -0.21 | -0.12 | 0.61 | |||||||||||||
MAX | 41.24 | 43.98 | 51.77 | 58.35 | 67.40 | 75.62 | 75.60 | 75.39 | 67.79 | 60.43 | 48.10 | 42.44 | 55.99 | |||||||||||||
MIN | 24.07 | 28.03 | 34.79 | 44.93 | 51.13 | 63.40 | 65.63 | 61.61 | 56.28 | 48.18 | 34.48 | 26.55 | 49.51 | |||||||||||||
YRS | 57 | 59 | 63 | 66 | 67 | 65 | 64 | 65 | 59 | 61 | 59 | 49 | 28 |