YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | 43.89 | v | 42.07 | 43.93 | c | 53.48 | j | 53.74 | 56.05 | 67.73 | a | 63.90 | a | 57.98 | b | 51.61 | 42.62 | a | 41.10 | b | 52.07 | b | ||||
1907 | 32.13 | a | 42.73 | 41.02 | 48.30 | 55.82 | 59.08 | 64.26 | 61.48 | 59.43 | 55.03 | a | 46.30 | c | 40.40 | b | 50.50 | |||||||||
1908 | 40.10 | a | 38.53 | 42.11 | 47.95 | a | 50.45 | 58.21 | a | 64.80 | a | 61.14 | b | 56.69 | a | 50.15 | a | 47.35 | 37.23 | 49.56 | ||||||
1909 | 34.43 | a | 38.52 | 42.92 | 47.12 | a | 50.68 | 57.37 | 58.79 | 60.18 | 58.35 | 50.79 | 42.50 | 34.06 | 47.98 | |||||||||||
1910 | 35.56 | 36.84 | 45.45 | 48.18 | 55.85 | 55.33 | a | 61.98 | 59.74 | 57.18 | ----- | z | ----- | z | ----- | z | 50.68 | c | ||||||||
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.58 | 65.60 | 64.50 | 56.60 | 53.58 | a | 43.48 | 40.61 | 54.57 | e | ||||||
1912 | 41.81 | 44.11 | b | 44.54 | e | 45.98 | a | 55.18 | 58.78 | a | 63.40 | b | 63.05 | 60.02 | 52.19 | m | 43.90 | 40.16 | b | 50.99 | a | |||||
1913 | 35.90 | a | 39.23 | d | 41.52 | 47.41 | a | 52.68 | 58.78 | a | 63.76 | 65.00 | b | 62.42 | x | 50.53 | b | 45.05 | 42.74 | 49.33 | a | |||||
1914 | 40.56 | 43.05 | 47.62 | a | 50.40 | 56.90 | a | 58.70 | b | 63.92 | a | 64.08 | 56.72 | 55.13 | a | 46.48 | c | 39.53 | 51.92 | |||||||
1915 | 41.10 | a | 43.85 | e | 50.26 | 52.85 | 54.60 | a | 58.87 | 63.38 | a | 67.44 | 61.02 | 52.77 | k | ----- | z | ----- | z | 54.82 | c | |||||
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | 36.00 | f | 38.97 | 44.78 | 51.42 | m | 55.65 | f | ----- | z | 62.37 | a | 56.13 | 55.00 | j | 47.24 | a | 42.00 | k | 49.90 | g | |||
1918 | 40.00 | f | 37.59 | 42.45 | 48.41 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.82 | i | ||
1919 | ----- | z | ----- | z | 44.03 | p | 53.50 | w | ----- | z | ----- | z | 64.76 | l | 63.83 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | 41.52 | c | 43.43 | h | ----- | z | ----- | z | ----- | z | 64.78 | v | 61.81 | w | ----- | z | 52.83 | a | 46.10 | i | ----- | z | 47.18 | j |
1922 | ----- | z | 37.13 | e | 41.13 | 49.08 | d | 52.62 | a | 61.63 | g | 63.36 | f | 62.90 | j | 60.09 | s | 53.84 | ----- | z | 38.61 | c | 45.40 | f | ||
1923 | 37.60 | a | 34.64 | f | 46.77 | t | 51.44 | f | 53.44 | w | 57.38 | r | 59.84 | 65.90 | 60.92 | 51.66 | 46.12 | 40.69 | 51.82 | e | ||||||
1924 | 39.08 | ----- | z | ----- | z | ----- | z | 51.85 | 59.26 | a | 62.16 | 65.53 | 59.57 | 51.00 | g | 41.95 | k | 36.24 | d | 53.39 | e | |||||
1925 | 39.28 | h | 41.74 | g | 43.69 | 49.38 | a | 57.07 | a | 58.40 | a | 62.96 | e | 62.77 | 60.13 | d | 52.83 | b | 43.36 | b | 43.74 | 53.43 | b | |||
1926 | 39.72 | h | 43.29 | 48.62 | e | 55.98 | e | 55.45 | 62.38 | b | 63.14 | i | 63.26 | b | 56.41 | a | 52.22 | h | 47.02 | a | 38.87 | 52.36 | c | |||
1927 | 39.35 | 41.96 | 42.68 | 47.35 | 51.42 | 61.00 | 64.53 | 66.45 | 58.95 | 52.16 | 44.10 | 36.73 | a | 50.56 | ||||||||||||
1928 | 41.90 | 42.72 | 46.40 | 48.16 | a | 57.98 | 59.62 | 64.94 | 63.85 | 59.57 | 51.45 | 44.83 | 38.26 | 51.64 | ||||||||||||
1929 | 34.60 | 35.59 | 44.44 | 45.03 | 54.35 | 58.67 | 63.47 | 64.45 | 61.78 | 53.44 | 43.47 | 41.74 | 50.09 | |||||||||||||
1930 | 31.22 | a | 41.32 | 47.06 | 52.27 | 52.44 | 57.87 | 62.52 | 66.10 | 60.13 | 50.66 | 43.32 | 41.34 | 50.52 | ||||||||||||
1931 | 43.85 | 41.79 | 45.29 | 51.23 | 58.89 | 58.88 | 65.94 | 64.69 | 58.23 | 51.58 | 40.53 | 38.29 | 51.60 | |||||||||||||
1932 | 37.35 | 37.22 | 45.00 | b | 49.22 | 53.98 | 61.40 | 59.31 | 63.74 | 61.07 | 52.76 | 46.32 | 36.13 | 50.29 | ||||||||||||
1933 | 35.98 | 35.02 | 41.63 | 47.97 | 49.48 | 57.17 | 62.11 | 65.97 | 56.10 | 51.79 | 44.69 | a | 42.45 | 49.20 | ||||||||||||
1934 | 42.79 | 46.07 | 50.87 | 56.15 | 57.05 | a | 59.85 | f | 62.41 | h | 65.00 | e | 59.19 | d | 55.12 | c | 47.03 | 40.74 | 52.00 | b | ||||||
1935 | 41.19 | r | 44.30 | a | 40.81 | 49.47 | 56.55 | a | 60.20 | e | 62.45 | b | 63.93 | b | 62.45 | 50.70 | d | 41.47 | 41.94 | 52.20 | a | |||||
1936 | 41.09 | c | 35.86 | 41.66 | b | 51.00 | a | 56.52 | k | 59.93 | h | 63.67 | a | 66.87 | d | 60.12 | d | 54.60 | 43.92 | 41.41 | c | 50.02 | b | |||
1937 | 30.48 | a | 37.25 | b | 45.71 | b | 45.65 | c | 55.07 | h | 60.83 | g | 64.23 | a | 61.86 | c | 60.82 | 54.23 | a | 46.72 | 41.73 | a | 48.87 | b | ||
1938 | 40.82 | 40.82 | 42.63 | 53.22 | 57.40 | 60.05 | 64.67 | a | 60.95 | 61.58 | 51.05 | 40.90 | 40.08 | 51.18 | ||||||||||||
1939 | 41.13 | 37.93 | 44.02 | 50.92 | 54.00 | 55.55 | b | 62.28 | b | 64.55 | b | 59.00 | 50.32 | 47.52 | 44.32 | 50.96 | ||||||||||
1940 | 41.90 | 42.53 | 45.95 | a | 49.79 | b | 57.03 | 62.34 | a | 63.00 | 65.27 | a | 61.83 | c | 54.93 | b | 41.52 | a | 42.65 | a | 52.40 | |||||
1941 | 43.47 | 45.52 | 51.42 | 53.23 | 55.53 | 59.48 | 67.39 | 63.65 | 57.10 | 52.34 | 46.72 | 40.98 | 53.07 | |||||||||||||
1942 | 41.24 | 42.09 | 43.56 | 50.14 | b | 55.02 | 59.47 | 65.40 | 65.76 | 60.80 | 54.38 | a | 42.32 | 40.82 | 51.75 | |||||||||||
1943 | 34.58 | 42.18 | 42.55 | 49.67 | 52.03 | 57.94 | e | 62.56 | 61.94 | 61.67 | a | 52.29 | 46.27 | 39.16 | 50.24 | |||||||||||
1944 | 40.63 | 40.91 | 43.08 | 48.37 | 54.10 | 58.66 | a | 63.47 | 61.71 | 61.12 | 55.10 | 45.25 | 38.16 | 50.88 | ||||||||||||
1945 | 38.74 | h | 41.44 | a | 41.57 | a | 45.80 | b | 55.31 | d | 57.72 | c | 63.94 | e | 63.71 | e | 57.71 | b | 52.56 | 42.00 | 39.79 | 51.05 | a | |||
1946 | 39.58 | 40.12 | 42.42 | 47.12 | 58.13 | d | 57.36 | e | 63.14 | f | 63.63 | d | 58.57 | b | 48.31 | 41.29 | b | 39.79 | 48.76 | a | ||||||
1947 | 34.47 | 43.00 | 47.67 | b | 51.28 | a | 57.75 | c | 59.09 | b | 64.53 | a | 62.34 | b | 61.21 | d | 51.07 | i | 43.17 | d | 41.85 | g | 52.45 | b | ||
1948 | 38.34 | i | 37.38 | l | 43.60 | j | 46.75 | h | 53.92 | m | 63.44 | f | 62.25 | a | 60.76 | b | 58.71 | f | 50.95 | k | 41.09 | n | ----- | z | 61.50 | j |
1949 | 30.58 | f | 35.85 | k | 44.57 | h | 49.53 | k | 56.66 | f | 58.22 | 61.16 | c | 61.78 | a | 61.12 | a | 48.30 | c | 49.30 | 37.75 | k | 56.65 | f | ||
1950 | ----- | z | 38.43 | m | 38.72 | o | 43.47 | l | 49.03 | n | 57.09 | h | 61.67 | d | 63.45 | 60.43 | g | 48.82 | q | 41.10 | y | ----- | z | 62.56 | j | |
1951 | 36.33 | j | 40.12 | k | 35.67 | m | 50.48 | j | 52.66 | i | 59.55 | j | 62.57 | a | 62.71 | 59.86 | i | ----- | z | 42.88 | r | 38.25 | u | 62.64 | j | |
1952 | 35.69 | o | 39.79 | o | 40.35 | u | 47.87 | k | 53.45 | j | 54.67 | o | 62.69 | 62.66 | b | 61.42 | j | 55.08 | m | 41.92 | x | ----- | z | 62.67 | j | |
1953 | ----- | z | 42.20 | w | 44.78 | v | 45.94 | n | 53.56 | n | 56.03 | l | 61.77 | 62.81 | 61.81 | c | 51.08 | k | 45.42 | k | 41.20 | k | 62.13 | i | ||
1954 | 34.17 | p | 40.10 | m | 42.68 | n | 43.50 | l | 55.13 | p | 57.31 | q | 60.90 | f | 61.25 | i | 58.81 | i | 52.16 | o | 51.47 | o | 42.73 | p | ----- | z |
1955 | 39.14 | t | 37.34 | l | 37.50 | h | 43.48 | i | 49.53 | l | 57.31 | i | 58.24 | 61.24 | 58.30 | c | 48.56 | n | 39.44 | n | 36.87 | l | 59.26 | i | ||
1956 | 37.74 | j | 33.55 | i | 38.60 | j | 50.45 | k | 58.08 | f | 55.25 | j | 63.50 | a | 63.12 | a | 58.70 | 48.58 | 40.22 | n | 39.08 | 54.60 | g | |||
1957 | 33.42 | 38.11 | 42.61 | 48.75 | 55.84 | 58.58 | 60.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.19 | e | |||||||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.28 | n | 52.71 | 43.34 | a | 42.04 | g | 48.03 | j | |
1964 | 38.81 | d | 41.29 | h | ----- | z | 46.43 | c | 51.69 | d | 57.00 | c | 61.61 | h | 61.12 | g | 57.15 | j | 53.43 | j | 41.33 | l | 37.50 | l | 48.48 | h |
1965 | 37.23 | i | 41.53 | k | 46.82 | c | 49.20 | j | 51.58 | l | ----- | z | 64.21 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.82 | k |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | 41.80 | e | 41.52 | a | 45.98 | c | 54.11 | h | 64.52 | g | 65.44 | 69.76 | 65.96 | c | 51.69 | d | 44.40 | 38.50 | c | 51.67 | c | |||
1968 | 39.53 | b | 45.20 | a | 46.16 | c | 47.86 | a | 56.38 | a | 59.52 | b | 66.97 | 62.87 | 61.39 | g | 50.67 | h | 46.37 | k | 37.29 | j | 53.06 | d | ||
1969 | 32.19 | b | 37.09 | a | 44.69 | d | 46.22 | a | 56.97 | 62.13 | c | 62.19 | 60.56 | 58.85 | d | 49.98 | h | 45.24 | g | 43.12 | g | 51.21 | c | |||
1970 | 40.33 | a | 44.22 | a | 45.75 | c | 45.08 | d | 52.19 | e | 64.02 | 65.19 | 64.89 | 56.97 | a | 51.08 | f | 44.20 | b | 37.68 | f | 52.28 | b | |||
1971 | 37.20 | c | 39.83 | b | 39.12 | f | 46.84 | a | 53.52 | c | 54.18 | 62.12 | b | 65.34 | c | 57.46 | b | 49.95 | a | 42.92 | d | 36.12 | b | 49.59 | a | |
1972 | 35.03 | 38.66 | a | 44.19 | 43.50 | d | 56.72 | b | 58.61 | b | 65.68 | a | 66.35 | 56.53 | 50.06 | 45.03 | a | 37.70 | f | 50.94 | a | |||||
1973 | 38.14 | c | 40.89 | a | ----- | z | 48.22 | 54.17 | m | 58.46 | g | 61.33 | a | 60.15 | 59.54 | f | 49.45 | a | 38.61 | b | 41.20 | h | 48.11 | e | ||
1974 | 37.58 | e | 39.14 | 42.21 | 47.05 | 48.46 | e | 58.46 | d | 61.47 | 64.84 | 64.36 | a | 51.96 | c | 44.95 | j | 41.00 | k | 51.55 | b | |||||
1975 | 36.12 | k | 39.12 | k | 39.97 | m | 43.39 | l | 52.53 | m | 55.19 | l | 62.96 | g | 61.04 | c | 62.42 | f | 49.07 | j | 43.32 | p | 38.52 | j | 61.04 | k |
1976 | 39.85 | k | 37.47 | j | 39.70 | i | 46.95 | h | 51.59 | n | 54.18 | h | 60.77 | 59.06 | 60.59 | b | 49.98 | k | 43.68 | p | 37.75 | q | 60.14 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.08 | 40.68 | 44.29 | 48.74 | 54.58 | 58.80 | 63.16 | 63.52 | 59.50 | 52.06 | 44.31 | 39.84 | 50.80 | |||||||||||||
S.D. | 3.59 | 2.89 | 2.81 | 2.82 | 2.57 | 1.95 | 2.08 | 2.16 | 2.21 | 1.94 | 2.31 | 2.30 | 1.21 | |||||||||||||
SKEW | -0.42 | -0.15 | 0.72 | 0.72 | -0.46 | 0.31 | -0.10 | 0.23 | 0.48 | -0.08 | -0.15 | -0.38 | -0.34 | |||||||||||||
MAX | 43.85 | 46.07 | 51.42 | 56.15 | 58.89 | 64.02 | 67.73 | 69.76 | 65.96 | 55.13 | 49.30 | 44.32 | 53.07 | |||||||||||||
MIN | 30.48 | 35.02 | 38.97 | 43.50 | 48.46 | 54.18 | 58.24 | 59.06 | 56.10 | 48.30 | 38.61 | 34.06 | 47.98 | |||||||||||||
YRS | 38 | 43 | 43 | 44 | 40 | 40 | 50 | 54 | 46 | 39 | 40 | 36 | 18 |