YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1901 | ----- | z | ----- | z | ----- | z | ----- | z | 52.81 | o | 57.90 | 68.39 | 66.81 | 54.10 | 47.65 | h | ----- | z | ----- | z | 61.80 | 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 | 29.00 | f | 36.39 | 41.43 | 49.23 | 54.20 | 64.06 | 63.10 | 55.93 | ----- | z | 37.13 | ----- | z | 50.18 | d | ||||||||
1911 | ----- | z | 28.43 | 37.84 | 37.33 | 42.52 | 54.93 | 67.30 | a | 64.27 | a | 58.30 | 43.57 | a | 29.97 | 20.61 | 44.10 | a | ||||||||
1912 | ----- | z | 26.05 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.73 | a | 55.52 | a | 50.32 | 45.24 | a | ----- | z | 53.45 | h | |
1913 | 21.87 | 28.54 | 30.48 | 39.07 | 42.97 | a | 47.70 | c | 56.10 | a | ----- | z | 71.96 | g | 39.76 | j | 38.53 | 28.03 | 37.03 | c | ||||||
1914 | 31.65 | 29.36 | 36.68 | 45.11 | l | ----- | z | 52.70 | 63.42 | 60.39 | 55.07 | 46.29 | 37.00 | 28.23 | 44.08 | b | ||||||||||
1915 | 29.03 | ----- | z | 36.22 | m | 40.80 | 44.61 | 53.83 | 62.26 | 62.32 | 53.93 | 43.45 | 33.80 | 29.39 | 45.34 | b | ||||||||||
1916 | 30.20 | a | 34.79 | a | 38.35 | 40.20 | 44.35 | 55.07 | 63.97 | 61.26 | 54.67 | 42.19 | 25.83 | 17.19 | 42.34 | |||||||||||
1917 | 15.35 | 24.32 | 27.94 | 37.97 | a | 45.32 | 52.70 | 64.55 | 58.81 | 54.43 | b | ----- | z | ----- | z | 35.25 | w | 42.38 | c | |||||||
1918 | 25.32 | 31.14 | 37.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.43 | i | |||
1919 | 26.05 | i | 28.18 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.03 | ----- | z | ----- | z | ----- | z | 27.10 | 45.56 | j | ||
1921 | 29.61 | 31.54 | 38.32 | 37.83 | 48.71 | 59.67 | 68.06 | 64.52 | h | 55.43 | 51.11 | c | 37.50 | 36.03 | 44.89 | a | ||||||||||
1922 | 26.90 | 32.04 | 33.23 | 38.43 | 48.10 | 59.67 | 65.97 | 57.42 | ----- | z | ----- | z | ----- | z | ----- | z | 45.22 | d | ||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.17 | m | ----- | z |
1924 | 24.48 | 28.31 | 30.08 | f | 39.19 | c | 47.75 | c | 52.63 | c | 60.37 | a | 63.17 | g | 60.97 | 35.67 | a | 29.73 | 26.42 | 40.55 | b | |||||
1925 | 26.81 | 31.00 | b | 32.44 | v | 38.08 | d | ----- | z | ----- | z | ----- | z | 61.05 | j | 50.10 | 47.27 | t | 34.17 | f | 30.97 | 35.39 | g | |||
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.14 | c | 53.23 | 44.77 | 35.90 | ----- | z | 48.76 | h | |||
1927 | ----- | z | ----- | z | ----- | z | 40.29 | b | 46.16 | 54.97 | 65.83 | a | 62.43 | h | 54.27 | 44.10 | ----- | z | ----- | z | 50.94 | f | ||||
1928 | ----- | z | ----- | z | 36.16 | 37.46 | d | 49.41 | d | 54.04 | e | 61.48 | 61.41 | i | 53.78 | u | 43.15 | k | ----- | z | 26.64 | i | 47.71 | g | ||
1929 | 24.29 | c | 23.78 | e | 30.50 | g | 37.73 | 45.66 | b | 50.20 | e | 64.30 | a | 62.47 | a | 54.61 | b | 42.00 | 29.34 | a | 27.79 | q | 43.44 | b | ||
1930 | 29.21 | l | 32.29 | d | 33.57 | c | 42.46 | b | 42.13 | 55.39 | g | 64.45 | i | 62.21 | g | 54.40 | 41.15 | d | 32.46 | f | 23.85 | d | 38.55 | e | ||
1931 | 28.10 | a | 35.46 | d | 33.11 | c | 43.07 | 48.15 | d | 55.13 | 67.30 | a | 62.88 | g | 54.28 | e | 46.33 | g | 31.08 | e | 26.74 | d | 42.24 | b | ||
1932 | 22.37 | a | 31.72 | d | 33.40 | a | 39.15 | c | 46.79 | g | 52.21 | b | 63.42 | 60.65 | 55.19 | c | 43.41 | b | 34.96 | e | 21.00 | b | 41.59 | a | ||
1933 | 23.33 | d | 22.52 | c | 32.21 | g | 36.96 | b | 41.20 | a | 54.21 | b | 67.32 | 62.48 | b | 57.14 | a | 46.77 | a | 33.43 | 30.03 | a | 43.22 | a | ||
1934 | 27.87 | 33.14 | 40.73 | a | 44.38 | a | 51.83 | a | 52.66 | a | 65.71 | 63.31 | b | 52.57 | 44.03 | a | 34.77 | 30.81 | 45.15 | |||||||
1935 | 29.42 | 32.96 | 34.67 | a | 43.63 | c | 45.66 | b | 54.67 | 60.65 | 64.06 | 56.27 | 41.74 | 31.78 | c | 28.93 | b | 43.70 | ||||||||
1936 | 26.23 | 30.97 | 35.11 | c | 42.00 | a | 46.81 | e | 58.77 | 64.71 | 63.79 | c | 54.21 | a | 46.08 | s | 36.10 | t | 25.36 | t | 46.95 | c | ||||
1937 | 12.92 | g | 30.96 | a | 33.03 | 38.27 | d | 49.71 | 56.69 | a | 64.58 | 63.14 | b | 57.13 | 45.39 | 34.00 | 35.22 | h | 47.29 | b | ||||||
1938 | 30.97 | 31.50 | 33.18 | c | 38.83 | f | 47.40 | a | 55.76 | e | 60.55 | 61.75 | c | 58.88 | f | 43.79 | c | 27.20 | 31.63 | a | 42.37 | b | ||||
1939 | 28.71 | 24.25 | 35.03 | b | 41.31 | q | 47.23 | a | 54.73 | 63.83 | a | 63.04 | c | 56.68 | e | 40.52 | f | 37.46 | f | 31.97 | a | 45.05 | c | |||
1940 | 32.50 | a | 32.07 | 35.29 | 40.80 | 49.60 | a | 62.00 | 65.18 | i | 62.29 | 55.67 | 43.84 | 31.77 | 33.10 | 43.54 | a | |||||||||
1941 | 30.43 | a | 35.64 | 33.67 | a | 37.04 | c | 47.06 | 51.17 | 61.27 | e | 55.95 | j | 49.97 | 40.71 | 32.08 | f | 29.00 | 41.60 | b | ||||||
1942 | 27.83 | a | 25.50 | 30.52 | 39.33 | c | 44.10 | b | 53.52 | c | 63.13 | 60.19 | 50.86 | b | 42.45 | 34.37 | c | 29.71 | g | 42.89 | a | |||||
1943 | 25.50 | c | 32.92 | c | ----- | z | 41.17 | 51.06 | 51.03 | ----- | z | ----- | z | ----- | z | ----- | z | 33.30 | j | 32.91 | i | 40.34 | g | |||
1944 | ----- | z | 29.81 | h | 31.33 | p | 38.70 | j | 46.19 | j | 50.36 | h | 59.74 | l | 60.81 | d | 56.92 | d | ----- | z | ----- | z | ----- | z | 58.87 | j |
1945 | ----- | z | ----- | z | 34.15 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.15 | k |
1946 | ----- | z | ----- | z | 33.33 | j | 45.03 | ----- | z | 54.75 | j | 62.58 | 62.48 | ----- | z | ----- | z | ----- | z | ----- | z | 56.70 | i | |||
1947 | ----- | z | ----- | z | ----- | z | 41.09 | s | 53.22 | h | 56.52 | i | 60.76 | n | 62.70 | a | 59.59 | a | 45.94 | 30.43 | 27.23 | a | 45.18 | g | ||
1948 | 25.63 | a | 26.68 | d | 30.03 | 38.48 | a | 45.00 | e | 55.74 | c | 61.93 | b | 60.58 | e | 55.17 | a | 46.03 | 29.63 | 27.20 | a | 41.84 | ||||
1949 | 19.13 | 20.22 | a | 30.87 | a | 40.93 | 47.97 | a | 58.20 | 65.65 | 59.12 | g | 58.13 | 42.42 | 37.93 | 25.06 | 40.59 | a | ||||||||
1950 | 25.26 | 32.50 | b | 33.85 | d | 41.20 | j | 46.10 | a | 52.59 | a | 65.61 | 61.57 | a | 52.48 | e | 46.96 | e | 36.59 | c | 32.91 | h | 45.35 | b | ||
1951 | 27.04 | f | 30.96 | a | 33.10 | b | 41.92 | e | 48.70 | d | 53.15 | c | 65.90 | b | 61.97 | a | 55.33 | i | 44.56 | f | 32.48 | c | 27.83 | h | 46.02 | d |
1952 | 29.67 | a | 30.03 | 31.17 | b | 42.21 | f | 47.90 | b | 54.41 | h | 60.90 | 63.87 | a | 57.04 | e | 46.97 | 31.72 | a | 30.52 | j | 44.36 | c | |||
1953 | 32.36 | f | 25.12 | k | 33.18 | c | 39.26 | c | 44.33 | a | 55.00 | a | 66.73 | a | 61.50 | a | 52.64 | h | 44.19 | j | 34.32 | h | 27.08 | g | 50.00 | f |
1954 | 27.33 | m | 33.42 | d | 32.30 | d | 42.55 | j | 49.73 | i | 54.39 | l | 66.11 | d | 62.17 | b | 54.56 | c | 45.48 | h | 35.20 | e | 27.96 | d | 44.53 | e |
1955 | 26.68 | f | 24.47 | k | 30.15 | d | 33.80 | j | 45.95 | i | 53.09 | g | 60.23 | e | 63.95 | i | 61.89 | k | 46.48 | h | 36.04 | b | 31.00 | r | 42.14 | i |
1956 | 33.89 | c | 24.00 | e | 30.95 | i | 41.73 | h | 51.54 | c | 59.81 | i | 65.04 | e | 62.89 | c | 58.43 | 43.48 | b | 29.95 | j | 24.73 | e | 45.50 | d | |
1957 | 31.63 | a | 37.42 | b | 37.81 | 42.41 | c | 46.90 | b | 59.00 | f | 64.18 | i | 63.42 | e | 53.18 | b | 42.26 | d | 29.29 | f | 27.30 | d | 42.48 | c | |
1958 | 25.35 | e | 35.12 | d | 32.73 | e | 39.21 | b | 50.63 | a | 56.00 | c | ----- | z | 66.42 | e | 56.00 | b | 47.14 | b | 33.29 | f | 29.28 | b | 43.79 | b |
1959 | 26.69 | b | 27.89 | a | 32.72 | b | 41.52 | c | 47.68 | c | 60.39 | b | 65.65 | 60.67 | a | 49.43 | 41.48 | b | 32.55 | a | 29.48 | 43.01 | ||||
1960 | 20.81 | 26.04 | e | 34.80 | a | 40.00 | d | 46.32 | f | 58.97 | 64.58 | 62.19 | 57.11 | b | 45.77 | e | 36.44 | c | 28.50 | c | 43.20 | a | ||||
1961 | 29.19 | 30.81 | a | 33.68 | 40.39 | b | 48.38 | b | 60.73 | 66.40 | a | 63.94 | 51.67 | 41.97 | 33.73 | 26.48 | d | 43.95 | ||||||||
1962 | 27.74 | 31.96 | b | 29.42 | 43.67 | 45.27 | a | 54.54 | f | 63.10 | 63.90 | 58.27 | 43.31 | b | 36.86 | a | 30.37 | d | 43.08 | a | ||||||
1963 | 25.87 | a | 35.36 | 32.83 | a | 37.56 | c | 47.67 | a | 55.31 | a | 61.55 | b | 64.55 | 57.73 | d | 48.56 | d | 36.91 | g | 27.42 | e | 44.95 | a | ||
1964 | 23.70 | a | 24.15 | b | 30.64 | c | 40.73 | 46.04 | e | 56.73 | 65.55 | b | 63.19 | e | 54.40 | 49.11 | c | 31.19 | d | 28.35 | 42.82 | |||||
1965 | 30.58 | 28.65 | b | 34.43 | a | 40.13 | 44.48 | 52.03 | 61.07 | b | 61.87 | 51.00 | b | 46.14 | b | 39.39 | b | 30.68 | 43.37 | |||||||
1966 | 25.32 | 26.04 | 34.77 | 39.86 | b | 49.00 | a | 54.44 | l | 60.85 | d | 63.29 | g | 56.07 | a | 42.72 | f | 33.13 | g | 27.81 | d | 39.97 | d | |||
1967 | 26.04 | d | 26.17 | d | 35.60 | f | 31.44 | c | 45.00 | c | 53.41 | c | 64.89 | d | 62.56 | d | 58.96 | e | 47.22 | d | 37.68 | e | 26.52 | d | 43.63 | a |
1968 | 30.31 | b | 36.96 | c | 36.07 | a | 37.85 | c | 47.96 | c | 59.66 | a | 64.90 | k | 61.80 | u | 54.76 | e | 45.39 | c | 36.17 | g | 24.62 | b | 41.51 | c |
1969 | 34.72 | b | 30.11 | a | 28.70 | a | 37.67 | 48.06 | 55.14 | a | 64.70 | a | 66.29 | g | 55.24 | m | 42.13 | 36.42 | d | 30.16 | 40.78 | b | ||||
1970 | 26.97 | 32.78 | a | 28.93 | b | 33.17 | g | 46.94 | 54.90 | 66.20 | a | 66.94 | 53.76 | a | 43.39 | 36.47 | 29.87 | a | 44.28 | a | ||||||
1971 | 26.81 | 29.15 | a | 33.29 | 37.90 | 42.57 | a | 53.62 | a | 65.19 | 65.13 | a | 54.12 | d | 41.93 | a | 33.38 | d | 28.90 | 42.67 | ||||||
1972 | 24.90 | a | 29.86 | 37.06 | 37.74 | c | 43.61 | 53.80 | 64.67 | a | 60.45 | 55.24 | a | 47.65 | 33.25 | b | 26.42 | e | 42.89 | |||||||
1973 | 27.45 | 33.86 | 32.97 | b | 35.70 | 45.32 | c | 54.78 | c | 62.10 | 60.40 | a | 50.90 | 41.97 | 34.90 | 28.97 | a | 42.44 | ||||||||
1974 | 28.00 | d | 25.39 | 35.57 | a | 36.67 | 50.63 | a | 59.81 | c | 63.60 | a | 59.93 | a | 57.53 | 47.90 | 34.15 | j | 26.52 | 44.69 | a | |||||
1975 | 26.23 | a | 29.32 | 31.90 | 34.93 | a | 45.32 | 54.87 | 64.39 | 60.14 | b | 57.90 | a | 43.76 | b | 33.04 | b | 31.10 | 42.74 | |||||||
1976 | 28.43 | a | 34.45 | 33.20 | a | 36.28 | e | 50.82 | c | 55.75 | b | 64.87 | 60.57 | a | 57.14 | a | 43.81 | 34.41 | c | 26.10 | a | 43.82 | ||||
1977 | 29.23 | 29.70 | a | 29.68 | c | 40.63 | c | 44.80 | a | 58.63 | 64.81 | 63.29 | 55.83 | 48.48 | 36.53 | 35.10 | 44.73 | |||||||||
1978 | 33.59 | b | 33.77 | b | 39.67 | a | 40.63 | 46.10 | 56.86 | b | 62.61 | 60.57 | a | 54.90 | 49.26 | 36.27 | d | 26.03 | 45.02 | |||||||
1979 | 25.17 | a | 28.86 | 34.94 | 38.20 | 48.77 | 56.03 | 61.83 | b | 59.23 | 58.77 | 47.10 | 32.13 | 31.30 | a | 43.53 | ||||||||||
1980 | 36.39 | 36.59 | 36.24 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.49 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.37 | 30.24 | 33.76 | 39.44 | 46.86 | 55.29 | 63.96 | 62.29 | 55.21 | 44.67 | 34.18 | 28.10 | 43.38 | |||||||||||||
S.D. | 3.85 | 3.95 | 2.88 | 2.53 | 2.53 | 2.92 | 2.38 | 1.93 | 2.53 | 2.94 | 3.48 | 3.41 | 0.97 | |||||||||||||
SKEW | -0.34 | -0.37 | 0.18 | -0.22 | -0.08 | 0.17 | -0.62 | 0.18 | -0.27 | -0.13 | 0.22 | -0.59 | 0.47 | |||||||||||||
MAX | 36.39 | 37.42 | 40.73 | 45.03 | 51.83 | 62.00 | 68.39 | 66.94 | 60.97 | 51.11 | 45.24 | 36.03 | 45.15 | |||||||||||||
MIN | 15.35 | 20.22 | 27.94 | 31.44 | 41.20 | 47.70 | 56.10 | 57.42 | 49.43 | 35.67 | 25.83 | 17.19 | 41.84 | |||||||||||||
YRS | 52 | 56 | 53 | 52 | 54 | 52 | 55 | 52 | 56 | 48 | 45 | 47 | 16 |