YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.77 | 70.37 | a | 64.68 | 58.92 | r | 39.44 | l | 33.23 | 59.76 | h | |||
1916 | 34.06 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.76 | 58.86 | a | 50.06 | ----- | z | 43.12 | r | 58.56 | i | ||
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1918 | 31.18 | a | 38.05 | 46.81 | 50.05 | 59.82 | 75.72 | 73.83 | a | 72.11 | 68.10 | 57.03 | 39.90 | d | 29.06 | 53.47 | ||||||||||
1919 | 24.48 | 30.89 | 42.73 | ----- | z | 60.89 | 72.09 | a | ----- | z | ----- | z | ----- | z | ----- | z | 41.52 | h | 32.90 | a | 44.00 | f | ||||
1920 | 33.08 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.08 | k |
1921 | ----- | z | ----- | z | ----- | z | 48.56 | e | 58.71 | e | 68.26 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.64 | j |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.94 | 42.85 | ----- | z | 45.39 | j | ||
1924 | 28.75 | a | ----- | z | ----- | z | 43.67 | ----- | z | 67.78 | a | 67.77 | r | ----- | z | ----- | z | ----- | z | 42.54 | c | 28.29 | e | 42.20 | g | |
1925 | 29.38 | o | ----- | z | ----- | z | ----- | z | ----- | z | 41.72 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | 55.50 | y | 57.98 | a | ----- | z | ----- | z | 73.23 | 68.74 | e | 60.00 | 45.33 | a | 29.29 | 55.76 | f | |||
1927 | 35.66 | 39.62 | d | 39.43 | a | 50.34 | a | 62.07 | c | 67.54 | c | 73.74 | b | 69.34 | b | 63.98 | a | 54.97 | 46.68 | 26.40 | a | 52.48 | ||||
1928 | 33.45 | b | 31.21 | 39.88 | b | 46.78 | c | 55.94 | 64.47 | a | 72.91 | b | 66.84 | 62.02 | 56.06 | ----- | z | ----- | z | 52.95 | b | |||||
1929 | ----- | z | 29.79 | 38.35 | 46.15 | j | 59.23 | g | 66.48 | f | ----- | z | 69.25 | k | 63.57 | g | 54.00 | d | 41.72 | e | 39.96 | f | 40.97 | h | ||
1930 | 27.67 | e | 40.56 | a | 42.12 | a | 55.41 | c | 56.80 | c | 69.79 | m | 70.69 | m | 71.14 | f | 64.43 | a | 53.55 | b | 37.27 | d | 31.91 | c | 45.52 | c |
1931 | 31.17 | b | 38.73 | d | 40.91 | i | 52.39 | k | 57.94 | d | 66.33 | c | 73.95 | j | 71.00 | e | 66.37 | d | 56.30 | h | 38.17 | g | 21.44 | d | 50.43 | e |
1932 | 23.35 | d | 38.10 | c | 42.54 | h | 51.59 | s | 57.39 | m | 66.05 | h | 73.76 | h | 71.98 | f | 64.65 | g | 50.27 | k | 44.31 | f | 26.09 | d | 29.18 | i |
1933 | 26.50 | f | 23.29 | g | 43.89 | m | 41.91 | s | 53.74 | n | 70.00 | m | 74.00 | l | 71.18 | l | 69.33 | j | 57.11 | q | 47.33 | l | 38.50 | l | ----- | z |
1934 | 37.00 | k | 43.82 | i | 49.66 | i | 55.37 | k | 64.72 | k | 68.71 | m | 76.22 | m | 72.17 | j | 63.67 | g | 56.89 | i | 42.64 | h | 34.61 | c | 34.61 | k |
1935 | 34.24 | f | 35.77 | h | 40.72 | m | 48.00 | e | 54.06 | o | 69.12 | f | 74.36 | q | 70.30 | h | 64.81 | f | 52.79 | n | 39.39 | g | 33.54 | f | 48.00 | k |
1936 | 31.76 | j | 36.06 | c | 43.76 | f | 50.35 | g | 62.06 | o | 71.11 | c | 72.95 | j | 70.08 | g | 62.85 | c | 54.22 | m | 40.54 | e | 34.95 | l | 52.64 | h |
1937 | 18.43 | h | 30.14 | n | 40.39 | l | 50.07 | g | 59.81 | e | 68.61 | p | 72.48 | b | 73.75 | i | 68.16 | k | 56.91 | n | 45.97 | 35.63 | a | 53.47 | h | |
1938 | 34.44 | 35.12 | 40.24 | b | 49.63 | 56.05 | c | 68.82 | 70.87 | ----- | z | 63.90 | 54.80 | a | 37.07 | 35.63 | a | 49.69 | a | |||||||
1939 | 32.79 | b | 25.94 | a | 41.27 | a | 49.37 | 58.72 | a | 69.18 | 74.35 | 74.03 | 64.88 | 52.25 | a | 44.34 | b | 39.64 | b | 52.23 | ||||||
1940 | 32.82 | a | 35.28 | 44.33 | a | 50.70 | 61.69 | 69.32 | 74.65 | 71.48 | 62.98 | 54.82 | a | 39.42 | 34.11 | 52.63 | ||||||||||
1941 | 31.77 | 37.38 | 39.84 | 44.05 | 58.95 | a | 64.22 | 72.15 | 70.69 | 63.92 | 52.05 | 44.17 | 38.67 | a | 51.49 | |||||||||||
1942 | 35.94 | 37.16 | 40.26 | 49.43 | 57.76 | 68.75 | 74.13 | 71.98 | 66.50 | 57.52 | ----- | z | ----- | z | 55.94 | b | ||||||||||
1943 | 40.40 | ----- | z | ----- | z | 56.50 | f | 58.66 | 66.83 | c | 74.82 | q | 71.15 | k | 66.57 | a | 55.27 | ----- | z | ----- | z | 57.55 | g | |||
1944 | ----- | z | ----- | z | ----- | z | ----- | z | 62.14 | x | 67.66 | a | ----- | z | 71.64 | c | 64.07 | 55.02 | 37.57 | b | 33.22 | a | 54.86 | f | ||
1945 | ----- | z | 37.74 | g | 38.88 | n | ----- | z | ----- | z | ----- | z | 73.43 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.45 | t | 73.66 | 70.26 | 66.25 | 52.18 | 39.07 | 38.65 | 56.68 | f | ||||||
1947 | 26.93 | d | 40.42 | i | 43.42 | 49.17 | 61.39 | 65.67 | a | 76.02 | 69.65 | a | 67.62 | 56.08 | 34.48 | e | 30.68 | f | 55.04 | b | ||||||
1948 | 33.08 | a | 37.32 | g | 34.73 | 52.75 | 59.46 | q | 67.26 | c | 73.98 | 72.60 | 67.21 | d | 53.82 | 37.65 | c | 35.33 | a | 52.84 | b | |||||
1949 | 25.94 | 33.11 | e | 42.19 | e | 51.78 | 57.63 | 66.66 | a | 72.73 | 71.98 | e | 67.61 | p | 51.44 | 48.23 | 31.06 | 50.25 | a | |||||||
1950 | 32.17 | a | 37.05 | 41.94 | 52.28 | 56.62 | c | 69.66 | a | 73.18 | 72.77 | 63.40 | 63.15 | 46.20 | 40.10 | 54.04 | ||||||||||
1951 | 33.68 | a | 34.71 | 39.63 | 48.72 | 59.29 | 68.72 | 78.08 | 73.18 | 67.08 | 52.68 | 37.07 | 29.18 | 51.83 | ||||||||||||
1952 | 32.18 | 33.22 | 34.83 | a | 50.10 | 60.48 | 70.12 | 74.26 | 74.53 | a | 67.80 | 60.40 | 36.52 | 30.02 | a | 52.04 | ||||||||||
1953 | 37.37 | a | 33.50 | 40.91 | b | 48.52 | 54.35 | 71.62 | 76.02 | 72.23 | 69.45 | 55.05 | a | 43.65 | 29.45 | 52.68 | ||||||||||
1954 | 33.95 | 42.09 | 38.43 | a | 55.52 | 61.18 | a | 68.82 | 74.40 | b | 71.76 | 66.40 | 57.50 | 47.35 | 32.52 | a | 54.16 | |||||||||
1955 | 28.84 | 27.55 | 40.77 | 47.07 | 57.19 | 67.53 | 73.19 | 72.60 | 69.10 | 58.27 | 41.48 | 37.15 | 51.73 | |||||||||||||
1956 | 39.34 | 31.09 | 42.68 | 49.30 | 62.76 | 75.27 | 75.26 | 73.13 | 73.15 | 57.82 | a | 37.37 | 33.29 | 54.20 | ||||||||||||
1957 | 34.13 | 42.48 | 41.95 | 47.02 | 54.76 | 69.87 | 72.10 | 72.10 | 67.40 | 52.55 | 37.20 | 37.10 | 52.39 | |||||||||||||
1958 | 33.00 | 40.34 | 36.48 | 47.82 | 64.40 | 73.72 | 76.93 | b | 72.58 | 63.28 | 55.23 | 42.00 | 40.35 | 53.84 | ||||||||||||
1959 | 34.10 | a | 34.40 | b | 41.68 | 52.98 | 60.50 | 73.30 | 76.68 | 71.71 | 66.25 | 54.24 | 41.70 | 35.37 | a | 53.58 | ||||||||||
1960 | 27.08 | 30.55 | 45.34 | b | 52.42 | 59.65 | 71.73 | 77.53 | 74.97 | 68.95 | 52.10 | 43.41 | a | 27.29 | 52.59 | |||||||||||
1961 | 29.25 | a | 37.34 | 40.29 | 49.41 | a | 59.61 | 72.80 | 74.56 | 71.65 | 61.02 | a | 52.24 | 37.02 | a | 26.10 | 50.94 | |||||||||
1962 | 25.55 | a | 35.52 | 34.77 | a | 52.72 | 55.85 | a | 66.43 | 71.90 | 72.21 | 64.57 | a | 53.95 | 45.30 | 36.07 | b | 51.24 | ||||||||
1963 | 24.10 | 39.35 | a | 40.00 | a | 47.70 | 62.75 | a | 67.38 | 77.19 | 70.68 | a | 68.08 | 59.95 | b | 43.45 | 32.81 | 52.79 | ||||||||
1964 | 29.55 | 29.83 | 35.87 | 46.43 | 59.63 | ----- | z | 75.34 | 70.79 | 63.34 | a | 57.95 | 37.28 | a | 32.05 | 48.91 | a | |||||||||
1965 | 30.90 | 33.09 | 35.55 | a | 47.10 | 53.65 | a | 63.04 | b | 71.45 | 70.89 | 60.11 | b | 56.83 | b | 48.09 | a | 35.22 | a | 50.49 | ||||||
1966 | 30.00 | 31.25 | 43.81 | 52.20 | 64.65 | 70.42 | 76.98 | a | 72.87 | 66.83 | 56.58 | 47.57 | 31.81 | 53.75 | ||||||||||||
1967 | 30.73 | 39.79 | 47.21 | 48.52 | 57.71 | 65.19 | a | 73.90 | 70.42 | a | 64.37 | 57.12 | a | 46.90 | 27.17 | a | 52.42 | |||||||||
1968 | 27.34 | 39.93 | 42.18 | 44.88 | a | 55.74 | 68.14 | l | 72.52 | h | 67.52 | f | 63.60 | 55.97 | 39.82 | 28.92 | 44.26 | c | ||||||||
1969 | 35.24 | 34.54 | 37.50 | 51.47 | a | 59.88 | b | 64.65 | j | 73.74 | j | 73.78 | h | 66.32 | 48.66 | 40.12 | 37.23 | 45.66 | c | |||||||
1970 | 34.32 | 41.86 | 39.84 | c | 44.75 | 59.52 | 65.59 | g | 74.45 | i | 72.65 | h | 62.22 | a | 49.42 | 43.93 | a | 34.82 | 45.63 | c | ||||||
1971 | 34.55 | 35.77 | 43.21 | 48.70 | 56.20 | c | 69.63 | g | 74.92 | k | 69.86 | i | 63.02 | 50.71 | 41.63 | 31.26 | 45.00 | c | ||||||||
1972 | 35.08 | 41.55 | 50.55 | 52.78 | 58.80 | d | 68.98 | h | 73.13 | l | 71.50 | i | 64.47 | a | ----- | z | 36.85 | 30.78 | d | 46.36 | d | |||||
1973 | ----- | z | 35.12 | 37.34 | 44.86 | b | ----- | z | 66.20 | g | 70.72 | k | 68.90 | j | 62.60 | a | ----- | z | 42.47 | ----- | z | 44.48 | g | |||
1974 | 29.24 | 34.72 | a | 46.13 | a | 46.80 | 60.10 | b | 73.73 | s | 69.92 | k | 67.21 | n | 62.65 | c | 54.21 | c | 41.50 | a | 29.65 | a | 45.00 | c | ||
1975 | 29.43 | c | 36.27 | f | 39.93 | d | 44.70 | h | 51.74 | d | 60.62 | r | 70.09 | o | 67.48 | j | 61.85 | 53.90 | a | 38.79 | a | 30.80 | c | 43.78 | e | |
1976 | 31.46 | c | 38.32 | a | 41.05 | b | 50.28 | c | 58.84 | f | 67.45 | a | 72.60 | k | 70.30 | k | 64.02 | b | 51.50 | b | 41.70 | c | 32.70 | a | 46.50 | c |
1977 | 28.02 | c | 38.31 | a | 39.65 | a | 51.48 | e | 56.31 | d | 71.79 | i | ----- | z | 70.36 | t | 66.14 | a | 56.89 | c | 42.84 | a | 38.88 | a | 46.50 | c |
1978 | 34.36 | b | 34.90 | b | 45.24 | 50.75 | ----- | z | ----- | z | ----- | z | 70.77 | i | 64.94 | d | 58.64 | f | ----- | z | 27.97 | m | 46.04 | g | ||
1979 | 27.37 | a | 34.71 | b | 40.18 | c | 49.75 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.09 | i |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.39 | 35.68 | 40.92 | 49.35 | 58.70 | 68.93 | 74.23 | 71.62 | 65.13 | 54.75 | 41.61 | 32.68 | 52.59 | |||||||||||||
S.D. | 3.86 | 3.99 | 3.46 | 2.84 | 2.77 | 3.05 | 1.97 | 1.77 | 2.70 | 3.21 | 3.68 | 4.26 | 1.07 | |||||||||||||
SKEW | -0.05 | -0.31 | 0.32 | 0.02 | -0.10 | 0.37 | 0.19 | -0.87 | 0.29 | 0.15 | 0.09 | -0.18 | -0.10 | |||||||||||||
MAX | 40.40 | 42.48 | 50.55 | 55.52 | 64.65 | 75.72 | 78.08 | 74.97 | 73.15 | 63.15 | 48.23 | 40.35 | 54.20 | |||||||||||||
MIN | 23.35 | 25.94 | 34.73 | 43.67 | 51.74 | 63.04 | 70.77 | 66.76 | 58.86 | 47.94 | 34.48 | 21.44 | 50.49 | |||||||||||||
YRS | 47 | 44 | 44 | 43 | 43 | 35 | 32 | 34 | 48 | 45 | 46 | 46 | 22 |