YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1901 | ----- | z | ----- | z | ----- | z | ----- | z | 66.22 | o | 73.23 | 83.15 | 79.77 | 70.05 | 64.41 | h | ----- | z | ----- | z | 76.55 | h | ||||
1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1910 | ----- | z | 44.75 | f | 53.85 | 58.78 | 67.50 | 73.48 | 79.61 | 79.65 | 73.87 | ----- | z | 51.43 | ----- | z | 67.27 | d | ||||||||
1911 | ----- | z | 40.57 | 52.31 | 54.13 | 61.11 | 72.63 | 80.68 | a | 79.23 | a | 72.35 | 59.80 | a | 46.83 | 36.23 | a | 59.63 | a | |||||||
1912 | ----- | z | 44.55 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.27 | a | 69.16 | a | 60.12 | c | 56.15 | c | ----- | z | 65.42 | h |
1913 | 36.52 | 41.90 | b | 47.25 | a | 56.26 | a | 62.27 | a | 67.85 | c | 74.22 | a | ----- | z | 79.67 | g | 59.57 | j | 50.88 | 40.50 | 53.07 | c | |||
1914 | 43.81 | 43.57 | 53.29 | b | 58.64 | l | ----- | z | 71.45 | 78.05 | 77.92 | 69.75 | 60.93 | b | 53.80 | 39.23 | 59.18 | b | ||||||||
1915 | 40.73 | ----- | z | 52.78 | m | 55.78 | 59.77 | 71.58 | 77.10 | 78.50 | 69.32 | 62.74 | 49.80 | 42.37 | 60.77 | b | ||||||||||
1916 | 39.63 | a | 49.62 | a | 54.82 | 57.62 | 61.81 | 72.80 | 78.77 | 75.08 | a | 70.97 | a | 57.06 | 45.52 | 34.37 | 58.17 | |||||||||
1917 | 31.15 | 40.68 | 45.16 | 54.69 | a | 59.19 | 72.85 | 80.52 | 76.37 | a | 71.29 | b | ----- | z | ----- | z | 51.56 | w | 59.10 | c | ||||||
1918 | 40.53 | 45.91 | 50.85 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.76 | i | ||
1919 | 38.50 | i | 41.64 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.50 | ----- | z | ----- | z | ----- | z | 40.76 | 59.63 | j | ||
1921 | 42.58 | 47.46 | 53.26 | 54.69 | a | 63.18 | 76.37 | 81.85 | 78.04 | h | 72.28 | 67.05 | c | 53.63 | 46.95 | 59.94 | a | |||||||||
1922 | 39.68 | 43.86 | 47.77 | 53.27 | 65.44 | 76.87 | 81.37 | 75.48 | ----- | z | ----- | z | ----- | z | ----- | z | 60.47 | d | ||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.10 | p | ----- | z |
1924 | 36.76 | 43.97 | 38.61 | i | 52.94 | c | 61.67 | s | 74.93 | h | 77.20 | a | 79.98 | i | 75.33 | a | 56.57 | a | 53.95 | 39.32 | a | 54.50 | d | |||
1925 | 40.87 | 47.42 | b | 44.75 | y | 55.87 | d | ----- | z | ----- | z | ----- | z | 75.62 | j | 67.73 | 60.36 | t | 49.74 | g | 45.10 | 51.40 | g | |||
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.63 | e | 70.42 | 62.42 | 52.88 | ----- | z | 65.59 | h | |||
1927 | ----- | z | ----- | z | ----- | z | 56.68 | b | 64.90 | b | 73.97 | 81.43 | a | 77.32 | i | 70.72 | 62.47 | ----- | z | ----- | z | 68.36 | f | |||
1928 | ----- | z | ----- | z | 51.38 | b | 52.81 | d | 65.79 | g | 73.65 | g | 79.89 | 78.37 | l | 71.38 | v | 58.92 | l | ----- | z | 38.39 | l | 61.36 | i | |
1929 | 37.92 | g | 38.41 | f | 46.70 | i | 53.72 | 64.17 | b | 69.88 | f | 80.28 | a | 78.15 | a | 70.52 | b | 60.24 | 48.40 | a | 47.54 | q | 65.07 | e | ||
1930 | 38.76 | l | 47.66 | i | 48.24 | f | 59.29 | b | 58.24 | b | 74.50 | g | 80.09 | i | 76.96 | h | 69.72 | 56.78 | f | 44.90 | f | 39.91 | d | 56.79 | h | |
1931 | 41.53 | b | 45.48 | e | 49.20 | c | 59.13 | g | 66.75 | i | 73.20 | 84.17 | a | 76.72 | h | 70.44 | f | 61.69 | g | 42.70 | e | 38.11 | d | 53.48 | e | |
1932 | 34.92 | a | 43.86 | d | 49.66 | b | 57.20 | c | 62.83 | g | 71.34 | b | 79.60 | a | 78.31 | 74.08 | d | 59.67 | b | 53.20 | e | 33.34 | b | 57.74 | a | |
1933 | 34.50 | d | 37.70 | c | 48.94 | g | 52.65 | c | 57.88 | a | 73.52 | b | 83.27 | 79.34 | b | 74.16 | a | 64.67 | b | 51.22 | a | 45.95 | c | 59.53 | a | |
1934 | 43.22 | a | 48.22 | a | 58.53 | a | 62.55 | b | 69.80 | a | 69.69 | a | 81.27 | 77.22 | b | 70.02 | 62.34 | b | 51.39 | b | 44.02 | a | 61.52 | |||
1935 | 41.43 | a | 46.94 | a | 48.13 | a | 57.63 | c | 60.71 | b | 74.43 | 77.94 | 78.82 | 72.62 | 59.50 | 47.78 | c | 43.93 | b | 59.16 | ||||||
1936 | 42.69 | 43.26 | 51.43 | d | 59.86 | a | 66.54 | e | 77.15 | 80.61 | 78.90 | e | 71.05 | b | 65.08 | s | 53.25 | x | 40.18 | t | 63.50 | c | ||||
1937 | 25.35 | g | 43.15 | a | 47.29 | 54.27 | d | 67.16 | 73.59 | a | 80.21 | 80.17 | b | 73.88 | 63.11 | 51.68 | 46.86 | i | 63.45 | b | ||||||
1938 | 44.48 | 43.05 | 45.91 | d | 54.91 | g | 63.40 | b | 73.76 | e | 78.29 | 78.16 | c | 74.71 | f | 60.11 | c | 44.83 | 45.14 | b | 57.71 | b | ||||
1939 | 41.32 | 35.50 | 50.93 | c | 58.50 | t | 65.57 | a | 73.37 | 80.30 | a | 77.65 | d | 66.71 | f | 55.58 | m | 52.58 | f | 47.79 | b | 59.05 | d | |||
1940 | 44.54 | c | 44.24 | 51.58 | 56.32 | 68.15 | a | 78.95 | 80.55 | i | 79.00 | 69.23 | 60.66 | 47.00 | 45.27 | 58.63 | a | |||||||||
1941 | 42.28 | a | 47.41 | 47.72 | a | 50.19 | c | 63.63 | 69.22 | 78.52 | e | 72.19 | j | 67.05 | 55.31 | 48.52 | g | 41.70 | a | 56.30 | b | |||||
1942 | 42.60 | a | 40.14 | 47.12 | a | 54.89 | c | 62.19 | b | 72.63 | c | 80.87 | 76.82 | 70.07 | b | 59.87 | 51.65 | c | 45.02 | g | 59.90 | a | ||||
1943 | 41.29 | c | 48.38 | c | ----- | z | 58.57 | 69.79 | 71.85 | ----- | z | ----- | z | ----- | z | ----- | z | 52.77 | j | 44.58 | k | 57.97 | g | |||
1944 | ----- | z | 42.26 | h | 48.73 | p | 54.39 | k | 63.98 | j | 69.98 | h | 78.29 | l | 78.90 | f | 74.95 | j | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | 48.04 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.04 | k |
1946 | ----- | z | ----- | z | 50.43 | j | 62.28 | a | ----- | z | 75.53 | j | 79.53 | 79.33 | a | ----- | z | ----- | z | ----- | z | ----- | z | 73.71 | i | |
1947 | ----- | z | ----- | z | ----- | z | 60.00 | t | 72.07 | i | 74.45 | j | 80.26 | n | 77.73 | a | 76.50 | a | 62.18 | 44.05 | 39.42 | a | 59.98 | g | ||
1948 | 42.73 | a | 40.56 | d | 43.53 | 55.64 | b | 64.86 | f | 74.09 | c | 79.07 | b | 77.77 | e | 74.19 | a | 62.32 | 45.50 | 40.43 | a | 57.80 | a | |||
1949 | 29.50 | e | 35.48 | a | 47.32 | a | 58.67 | 64.20 | a | 74.87 | 81.03 | 77.00 | g | 74.68 | 58.32 | 55.93 | 39.24 | 56.29 | a | |||||||
1950 | 39.06 | 47.40 | b | 51.00 | d | 60.45 | j | 64.30 | a | 72.47 | a | 79.82 | 79.22 | a | 68.88 | f | 66.54 | e | 54.37 | c | 50.11 | i | 61.58 | c | ||
1951 | 42.74 | f | 44.85 | b | 49.43 | b | 57.96 | e | 65.48 | d | 72.78 | c | 82.74 | b | 77.18 | a | 74.08 | k | 61.68 | f | 47.89 | c | 38.33 | h | 62.29 | d |
1952 | 40.80 | a | 44.52 | 44.02 | c | 58.35 | f | 66.93 | b | 72.14 | h | 78.69 | 80.40 | a | 74.31 | f | 67.37 | 46.10 | a | 44.40 | k | 58.60 | d | |||
1953 | 48.04 | f | 40.86 | n | 51.44 | e | 55.59 | c | 60.02 | b | 73.72 | a | 81.55 | a | 77.38 | a | 72.83 | i | 61.92 | k | 49.92 | k | 42.38 | g | 66.62 | f |
1954 | 42.62 | n | 50.96 | d | 46.93 | d | 60.44 | l | 69.26 | j | 71.68 | m | 81.98 | d | 77.90 | b | 72.85 | c | 65.77 | i | 53.91 | h | 42.81 | e | 62.24 | f |
1955 | 37.62 | j | 39.06 | k | 48.19 | d | 51.69 | l | 64.10 | j | 72.76 | g | 77.34 | f | 77.83 | j | 79.13 | k | 63.98 | h | 51.15 | d | 44.23 | r | 49.67 | j |
1956 | 46.88 | c | 39.23 | e | 48.90 | j | 56.70 | h | 67.33 | d | 77.72 | j | 80.24 | f | 77.91 | d | 75.72 | 60.64 | b | 47.34 | k | 41.79 | e | 58.50 | e | |
1957 | 41.12 | a | 50.40 | b | 51.45 | 56.39 | c | 61.57 | c | 76.78 | g | 81.16 | i | 78.46 | f | 72.05 | b | 56.21 | e | 43.79 | f | 43.08 | e | 54.03 | d | |
1958 | 41.42 | e | 47.77 | d | 45.10 | f | 54.55 | b | 68.88 | a | 74.76 | c | ----- | z | 81.52 | e | 71.77 | b | 62.79 | c | 49.46 | g | 47.10 | b | 61.17 | c |
1959 | 42.60 | b | 40.96 | a | 50.38 | b | 60.43 | c | 64.24 | d | 78.36 | b | 83.10 | 76.12 | a | 67.52 | a | 60.22 | b | 48.82 | b | 42.82 | 59.63 | |||
1960 | 35.67 | a | 40.37 | f | 52.02 | b | 57.60 | d | 64.38 | f | 77.62 | 82.12 | a | 79.60 | 73.84 | b | 61.58 | e | 51.17 | c | 42.43 | d | 61.36 | b | ||
1961 | 44.44 | 46.65 | a | 49.55 | 57.19 | c | 64.88 | b | 78.70 | 82.95 | a | 78.89 | 68.43 | 59.95 | 47.30 | b | 38.87 | d | 59.82 | |||||||
1962 | 40.92 | 45.56 | c | 44.40 | 62.13 | 62.23 | a | 73.54 | f | 79.61 | 80.77 | 74.57 | 61.17 | b | 53.50 | a | 45.42 | e | 59.12 | a | ||||||
1963 | 39.95 | a | 50.93 | 48.78 | b | 52.96 | e | 66.58 | a | 71.00 | b | 79.93 | b | 78.90 | 73.96 | d | 64.69 | d | 50.74 | g | 42.85 | e | 60.96 | a | ||
1964 | 38.58 | a | 40.39 | b | 45.86 | c | 54.85 | 63.31 | e | 73.20 | 81.91 | b | 77.56 | e | 71.17 | 67.09 | c | 46.31 | d | 41.74 | 58.50 | |||||
1965 | 44.10 | a | 44.02 | b | 47.24 | b | 53.43 | 60.50 | 68.50 | 77.55 | b | 77.90 | 67.41 | b | 64.35 | d | 52.61 | b | 42.02 | 58.30 | ||||||
1966 | 39.58 | a | 39.82 | 51.68 | 58.02 | b | 66.17 | k | 76.06 | u | 77.80 | d | 79.73 | g | 72.19 | a | 59.44 | f | 49.59 | g | 41.26 | d | 54.34 | e | ||
1967 | 41.94 | d | 45.12 | d | 52.20 | f | 49.09 | c | 63.16 | c | 69.96 | c | 80.85 | d | 77.80 | d | 70.24 | e | 64.08 | e | 52.83 | f | 37.17 | e | 59.94 | b |
1968 | 42.21 | b | 50.19 | c | 50.65 | a | 53.35 | c | 64.14 | c | 75.64 | b | 79.95 | k | 76.25 | u | 71.54 | e | 61.41 | c | 50.52 | g | 38.21 | b | 56.37 | c |
1969 | 45.34 | b | 41.89 | a | 44.03 | a | 55.05 | 65.42 | 71.38 | a | 79.65 | a | 81.19 | g | 72.32 | m | 56.76 | 49.98 | d | 45.35 | a | 55.49 | b | |||
1970 | 41.18 | 48.04 | a | 45.16 | b | 50.07 | g | 65.32 | 72.50 | c | 81.60 | a | 81.02 | 69.98 | a | 58.44 | 50.95 | 41.43 | a | 59.60 | a | |||||
1971 | 41.95 | 43.69 | a | 50.52 | 54.97 | 59.38 | a | 72.10 | a | 82.23 | 78.07 | a | 70.69 | d | 55.75 | a | 47.71 | d | 38.40 | 57.95 | ||||||
1972 | 40.27 | a | 47.21 | 56.06 | 56.52 | c | 63.40 | 72.40 | 81.57 | a | 76.77 | 70.16 | a | 58.08 | 45.38 | b | 38.27 | e | 58.84 | |||||||
1973 | 38.56 | 44.52 | 43.71 | b | 52.02 | 64.46 | d | 73.61 | c | 79.76 | 77.27 | a | 69.78 | 60.66 | 49.05 | 44.08 | a | 58.12 | ||||||||
1974 | 39.59 | d | 42.29 | 50.47 | a | 54.55 | 67.77 | a | 78.61 | c | 79.03 | a | 77.27 | a | 73.18 | 62.47 | 50.25 | j | 39.48 | 60.43 | a | |||||
1975 | 40.24 | b | 43.21 | 45.81 | 49.52 | a | 62.53 | 72.82 | 80.39 | 77.60 | b | 73.47 | a | 60.16 | b | 49.05 | b | 44.53 | 58.28 | |||||||
1976 | 43.85 | a | 47.34 | a | 47.40 | a | 53.08 | f | 66.75 | c | 72.96 | b | 79.58 | 76.73 | a | 69.98 | a | 58.81 | 51.43 | c | 42.62 | a | 59.77 | a | ||
1977 | 41.76 | 47.30 | a | 45.86 | c | 58.11 | c | 59.33 | a | 75.95 | 79.74 | 78.19 | 71.37 | 63.66 | 51.55 | 47.26 | 60.01 | |||||||||
1978 | 43.27 | c | 44.52 | d | 51.75 | a | 53.68 | 62.21 | 74.07 | c | 79.53 | 77.02 | a | 70.30 | 65.07 | a | 48.33 | d | 37.53 | 58.94 | ||||||
1979 | 34.75 | a | 42.09 | 47.39 | 54.88 | a | 63.74 | 73.60 | 79.30 | c | 74.69 | 76.03 | 63.45 | a | 46.35 | 45.56 | d | 58.49 | ||||||||
1980 | 45.33 | a | 48.38 | 47.50 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.86 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 40.68 | 44.48 | 49.17 | 55.80 | 63.89 | 73.50 | 80.22 | 78.09 | 71.55 | 61.25 | 49.75 | 41.73 | 58.98 | |||||||||||||
S.D. | 3.46 | 3.68 | 3.31 | 3.00 | 2.98 | 2.54 | 1.86 | 1.46 | 2.34 | 3.01 | 3.31 | 3.41 | 0.98 | |||||||||||||
SKEW | -1.17 | -0.36 | 0.38 | 0.16 | -0.03 | 0.28 | -0.42 | 0.07 | 0.18 | 0.09 | -0.08 | -0.27 | 1.28 | |||||||||||||
MAX | 46.88 | 50.96 | 58.53 | 62.55 | 69.80 | 78.95 | 84.17 | 81.52 | 76.50 | 67.37 | 56.15 | 47.79 | 61.52 | |||||||||||||
MIN | 29.50 | 35.48 | 43.53 | 49.09 | 57.88 | 67.85 | 74.22 | 74.69 | 67.05 | 55.31 | 42.70 | 33.34 | 57.95 | |||||||||||||
YRS | 51 | 53 | 51 | 50 | 49 | 49 | 53 | 50 | 51 | 47 | 43 | 47 | 14 |