YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | 48.60 | u | 48.32 | 52.93 | c | 65.20 | j | 63.81 | 65.67 | 82.35 | 77.97 | a | 67.87 | 59.55 | 47.79 | a | 45.55 | b | 61.18 | b | ||||||
1907 | 37.29 | 49.29 | 49.13 | 59.57 | 68.00 | 72.17 | 77.71 | 73.84 | 70.03 | 63.35 | 52.93 | a | 45.30 | a | 59.88 | |||||||||||
1908 | 45.27 | a | 44.86 | 49.74 | 59.00 | a | 59.29 | 68.80 | 78.87 | a | 73.32 | 68.55 | a | 59.16 | 52.87 | 41.97 | 58.47 | |||||||||
1909 | 39.43 | a | 42.79 | 51.26 | 58.33 | 61.42 | 69.40 | 69.77 | 72.48 | 69.47 | 58.06 | 48.20 | 38.39 | 56.58 | ||||||||||||
1910 | 40.35 | 42.79 | 54.45 | 58.43 | 67.61 | 66.52 | a | 75.55 | 72.68 | 68.17 | ----- | z | ----- | z | ----- | z | 60.73 | c | ||||||||
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.97 | 82.13 | 79.48 | 68.23 | 66.60 | a | 50.57 | 47.23 | 66.60 | e | ||||||
1912 | 47.94 | 51.59 | b | 57.24 | b | 55.48 | a | 67.74 | 73.37 | 75.97 | a | 76.42 | 74.77 | 60.10 | b | 49.27 | 45.10 | a | 61.25 | |||||||
1913 | 41.67 | a | 46.92 | b | 50.10 | 57.66 | a | 62.74 | 69.48 | a | 76.42 | 78.97 | b | 72.47 | o | 59.79 | b | 51.47 | 48.48 | 58.52 | a | |||||
1914 | 44.45 | 49.61 | 56.48 | 60.33 | 70.97 | 69.86 | b | 78.90 | 78.39 | 65.17 | 63.00 | 51.86 | b | 46.35 | 61.28 | |||||||||||
1915 | 48.43 | a | 51.67 | a | 60.06 | 64.80 | 63.81 | 70.50 | 74.80 | a | 81.65 | 73.33 | 61.70 | k | ----- | z | ----- | z | 65.45 | c | ||||||
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | 44.05 | f | 46.32 | 51.73 | 62.11 | m | 68.88 | d | ----- | z | 82.29 | 66.70 | 64.33 | j | 57.59 | a | 46.90 | k | 62.25 | f | ||||
1918 | 46.80 | f | 44.64 | 49.68 | 60.82 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.71 | i | ||
1919 | ----- | z | ----- | z | 54.94 | o | 66.71 | w | ----- | z | ----- | z | 81.63 | l | 77.41 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.00 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | 48.15 | b | 51.22 | h | ----- | z | ----- | z | ----- | z | 80.78 | v | 78.62 | w | 71.36 | h | 64.97 | a | 55.09 | h | ----- | z | 56.56 | j |
1922 | ----- | z | 47.70 | e | 51.26 | 62.92 | d | 68.42 | 79.04 | b | 79.77 | e | 78.14 | b | 75.17 | r | 66.03 | ----- | z | 47.62 | b | 64.54 | c | |||
1923 | 45.20 | a | 45.45 | f | 63.36 | t | 67.75 | f | 69.50 | w | 75.85 | q | 83.61 | 85.81 | 78.57 | 65.26 | 59.60 | 54.65 | 67.53 | e | ||||||
1924 | 55.94 | 55.69 | 60.83 | m | 61.47 | 69.77 | 75.03 | a | 82.23 | 77.65 | 71.90 | 58.46 | g | 48.11 | k | 41.70 | d | 65.71 | c | |||||||
1925 | 44.65 | h | 48.19 | g | 52.94 | 60.03 | a | 70.45 | 70.59 | a | 76.58 | e | 75.39 | 71.38 | d | 62.55 | b | 49.90 | 48.65 | 63.85 | b | |||||
1926 | 45.38 | e | 49.21 | 58.92 | e | 69.72 | e | 65.77 | 75.21 | b | 76.78 | d | 74.41 | b | 66.62 | a | 61.70 | h | 52.31 | a | 42.97 | 61.57 | a | |||
1927 | 43.68 | 49.18 | 50.94 | 57.43 | 60.39 | 72.33 | 77.13 | 80.06 | 68.37 | 58.97 | 48.37 | 41.80 | a | 59.05 | ||||||||||||
1928 | 45.90 | 49.34 | 54.06 | 56.87 | 71.68 | 70.03 | 76.90 | 77.16 | 71.17 | 57.84 | 50.27 | 42.94 | 60.35 | |||||||||||||
1929 | 39.68 | 42.89 | 52.16 | 54.13 | 65.94 | 68.73 | 76.84 | 77.55 | 75.47 | 60.97 | 49.47 | 46.03 | 59.15 | |||||||||||||
1930 | 37.00 | 47.18 | 57.84 | 61.90 | 63.81 | 68.57 | 75.61 | 80.03 | 70.50 | 58.94 | 49.27 | 45.84 | 59.71 | |||||||||||||
1931 | 48.55 | 48.68 | 52.19 | 63.30 | 72.42 | 69.60 | 80.81 | 79.03 | 67.47 | 59.94 | 45.93 | 42.06 | 60.83 | |||||||||||||
1932 | 41.65 | 42.34 | 51.76 | b | 58.50 | 65.29 | 74.43 | 69.68 | 74.35 | 73.80 | 60.29 | 51.60 | 41.42 | 58.76 | ||||||||||||
1933 | 39.87 | 40.68 | 48.39 | 60.07 | 57.68 | 69.63 | 76.00 | 80.90 | 65.10 | 59.48 | 50.43 | 46.65 | 57.91 | |||||||||||||
1934 | 47.65 | 53.39 | 60.97 | 68.07 | 68.07 | a | 72.96 | f | 73.26 | h | 76.96 | d | 69.35 | d | 65.25 | c | 52.13 | 45.03 | 60.69 | b | ||||||
1935 | 47.38 | r | 52.15 | a | 48.71 | 62.20 | 71.00 | a | 71.88 | e | 74.79 | b | 77.00 | b | 74.83 | 59.68 | c | 48.20 | 46.45 | 62.44 | a | |||||
1936 | 45.64 | c | 42.41 | 49.69 | b | 60.83 | a | 68.55 | k | 70.14 | h | 76.27 | a | 80.26 | d | 72.08 | d | 62.61 | 50.43 | 45.68 | c | 58.59 | b | |||
1937 | 35.37 | a | 42.26 | a | 53.83 | b | 52.96 | c | 67.65 | h | 72.35 | g | 77.90 | a | 74.18 | c | 71.23 | 63.30 | a | 52.07 | 46.27 | a | 56.94 | b | ||
1938 | 45.00 | 47.57 | 49.06 | 65.93 | 71.87 | 72.40 | 79.16 | 72.23 | 70.40 | 58.77 | 45.97 | 45.32 | 60.31 | |||||||||||||
1939 | 45.13 | 42.79 | 52.35 | 60.80 | 63.68 | 63.32 | b | 72.70 | a | 76.86 | b | 69.00 | 55.81 | 50.80 | 48.45 | 58.47 | ||||||||||
1940 | 46.00 | 46.38 | 52.10 | a | 57.36 | b | 67.77 | 75.80 | 73.26 | 77.26 | 71.61 | b | 61.97 | b | 47.03 | 47.60 | a | 60.34 | ||||||||
1941 | 48.97 | 53.00 | 60.97 | 65.13 | 66.03 | 69.87 | 80.45 | 74.42 | 65.77 | 58.74 | 53.00 | 46.23 | 61.88 | |||||||||||||
1942 | 46.74 | 48.68 | 52.19 | 58.93 | b | 64.48 | 70.20 | 75.61 | 77.97 | 71.87 | 61.63 | a | 47.53 | 45.03 | 60.07 | |||||||||||
1943 | 40.35 | 49.71 | 51.03 | 58.57 | 61.94 | 69.44 | e | 73.90 | 72.10 | 71.83 | a | 59.00 | 51.87 | 44.23 | 58.66 | |||||||||||
1944 | 45.97 | 47.62 | 51.10 | 57.20 | 64.35 | 69.97 | a | 75.87 | 70.94 | 70.77 | 62.26 | 49.77 | 43.26 | 59.09 | ||||||||||||
1945 | 43.74 | h | 47.37 | a | 48.53 | a | 55.43 | b | 65.22 | d | 69.93 | c | 77.88 | e | 75.85 | e | 68.00 | b | 59.97 | 46.57 | 43.90 | 59.88 | a | |||
1946 | 43.32 | 44.61 | 48.97 | 54.87 | 70.52 | d | 66.52 | e | 75.08 | f | 75.11 | d | 67.61 | b | 55.84 | 47.07 | b | 43.74 | 56.20 | a | ||||||
1947 | 38.45 | 49.64 | 56.03 | b | 61.31 | a | 69.14 | c | 68.68 | b | 73.55 | 72.31 | b | 72.50 | d | 56.35 | h | 47.81 | d | 46.21 | g | 60.94 | b | |||
1948 | 43.05 | i | 42.71 | l | 53.73 | i | 56.82 | h | 62.89 | l | 75.54 | f | 73.10 | a | 66.83 | b | 68.83 | f | 58.85 | k | 46.62 | n | ----- | z | 69.96 | j |
1949 | 34.92 | f | 40.94 | k | 52.52 | h | 59.79 | k | 68.80 | f | 69.27 | 72.43 | c | 70.40 | a | 71.03 | a | 55.39 | c | 53.67 | 42.30 | k | 65.36 | f | ||
1950 | ----- | z | 43.13 | m | 43.88 | n | 50.39 | l | 57.47 | n | 65.14 | h | 72.81 | d | 74.29 | 71.65 | g | 53.79 | q | 47.80 | y | ----- | z | 73.55 | j | |
1951 | 41.00 | j | 46.35 | k | 41.28 | m | 62.25 | j | 62.91 | i | 71.50 | h | 73.27 | a | 74.03 | 71.52 | i | ----- | z | 48.33 | r | 42.70 | u | 73.65 | j | |
1952 | 38.69 | o | 45.88 | l | 47.55 | t | 58.95 | k | 63.62 | j | 63.81 | n | 74.03 | 73.66 | b | 72.14 | i | 62.76 | j | 49.00 | u | 46.36 | t | 73.84 | j | |
1953 | ----- | z | 47.00 | w | 51.58 | s | 55.45 | j | 62.88 | n | 65.32 | k | 72.23 | 72.10 | 71.57 | b | 58.25 | k | 50.84 | k | 46.35 | h | 71.96 | i | ||
1954 | 38.20 | p | 46.00 | l | 52.89 | l | 52.58 | k | 65.89 | m | 66.94 | l | 69.04 | d | 68.50 | c | 66.40 | e | 58.00 | j | 56.44 | n | 48.00 | o | 67.98 | i |
1955 | 44.79 | q | 43.44 | j | 44.17 | h | 51.76 | i | 58.74 | l | 66.62 | i | 65.87 | 72.45 | 67.44 | c | 55.61 | m | 45.28 | l | 41.00 | l | 68.59 | i | ||
1956 | 42.14 | j | 38.65 | i | 44.90 | j | 62.33 | i | 69.58 | e | 62.67 | i | 74.13 | a | 73.29 | 67.33 | 54.52 | 45.38 | n | 43.35 | 63.70 | f | ||||
1957 | 37.58 | 43.18 | 48.84 | 56.50 | 64.29 | 67.07 | 69.42 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.27 | 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 | 72.35 | m | 61.39 | 48.76 | a | 49.00 | g | 55.07 | j | |
1964 | 43.93 | d | 51.36 | g | ----- | z | 57.11 | c | 64.04 | d | 67.56 | c | 74.48 | h | 73.50 | g | 70.45 | j | 67.41 | i | 49.72 | l | 42.45 | k | 58.16 | h |
1965 | 43.05 | i | 49.28 | j | 61.36 | c | 61.57 | i | 64.63 | l | ----- | z | 80.22 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.36 | k |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | 47.91 | e | 47.73 | a | 55.70 | c | 64.35 | h | 75.72 | e | 76.29 | 83.71 | 78.33 | c | 57.56 | d | 49.50 | 42.46 | c | 61.49 | b | |||
1968 | 44.03 | b | 51.66 | 53.41 | b | 57.62 | a | 66.93 | a | 69.18 | b | 79.45 | 73.68 | 72.96 | g | 57.65 | h | 51.58 | k | 42.24 | j | 62.00 | d | |||
1969 | 35.77 | a | 42.15 | a | 53.90 | b | 53.66 | a | 68.97 | 71.67 | c | 73.74 | 71.03 | 69.04 | d | 59.21 | g | 51.12 | d | 47.92 | f | 59.10 | b | |||
1970 | 45.06 | 51.30 | a | 55.39 | c | 54.23 | d | 63.33 | d | 75.77 | 76.55 | 76.48 | 66.38 | a | 59.59 | d | 49.64 | b | 42.08 | e | 59.65 | |||||
1971 | 41.83 | a | 45.26 | a | 46.48 | f | 56.97 | a | 64.86 | b | 62.37 | 75.60 | a | 77.52 | b | 68.00 | b | 56.93 | a | 48.11 | b | 40.10 | b | 57.96 | a | |
1972 | 40.00 | 44.14 | a | 50.77 | 51.92 | d | 68.79 | b | 67.30 | 76.39 | 77.87 | 65.90 | 58.45 | 48.86 | a | 42.36 | f | 59.13 | a | |||||||
1973 | 42.61 | c | 47.93 | a | ----- | z | 58.37 | 66.67 | j | 67.31 | d | 73.19 | 71.16 | 70.44 | e | 55.60 | a | 43.83 | 45.48 | f | 58.94 | c | ||||
1974 | 42.96 | d | 43.93 | 49.10 | 54.57 | 56.70 | d | 68.81 | c | 71.81 | 76.81 | 76.62 | a | 61.25 | c | 50.15 | j | 45.57 | j | 60.26 | b | |||||
1975 | 40.95 | i | 45.11 | j | 49.00 | j | 53.14 | i | 63.76 | j | 66.75 | j | 73.20 | a | 69.54 | c | 74.83 | f | 55.52 | j | 48.89 | l | 43.81 | j | 71.37 | j |
1976 | 45.14 | j | 43.16 | j | 47.18 | i | 57.09 | h | 64.05 | k | 64.48 | g | 72.65 | 68.35 | 71.57 | b | 63.00 | k | 54.76 | m | 45.62 | o | 70.86 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 43.33 | 47.24 | 52.65 | 58.86 | 66.06 | 70.22 | 75.57 | 75.59 | 70.20 | 60.25 | 50.08 | 44.86 | 59.59 | |||||||||||||
S.D. | 4.22 | 3.62 | 3.87 | 4.03 | 3.86 | 3.33 | 3.61 | 3.93 | 3.28 | 2.99 | 2.96 | 2.95 | 1.28 | |||||||||||||
SKEW | 0.29 | 0.12 | 0.79 | 0.57 | -0.42 | 0.28 | -0.06 | 0.14 | 0.66 | 0.23 | 0.87 | 0.63 | -0.29 | |||||||||||||
MAX | 55.94 | 55.69 | 61.36 | 69.72 | 72.42 | 79.04 | 83.61 | 85.81 | 78.57 | 66.60 | 59.60 | 54.65 | 61.88 | |||||||||||||
MIN | 35.37 | 40.68 | 46.32 | 51.73 | 56.70 | 62.37 | 65.87 | 66.83 | 65.10 | 54.52 | 43.83 | 38.39 | 56.58 | |||||||||||||
YRS | 39 | 44 | 43 | 45 | 41 | 44 | 54 | 56 | 48 | 41 | 41 | 37 | 20 |