YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | 30.26 | k | 38.29 | 46.50 | a | 53.81 | 61.12 | 66.31 | 65.96 | d | 58.38 | 46.44 | 37.35 | 22.89 | 49.70 | b | ||||||||
1915 | 17.81 | 24.91 | 32.98 | 45.85 | 49.05 | a | 57.36 | a | 64.50 | 63.90 | 56.53 | 46.02 | 33.88 | 26.13 | 43.24 | |||||||||||
1916 | 23.32 | 25.36 | 39.00 | 44.97 | 49.69 | 58.92 | 65.82 | a | 63.87 | 56.05 | 45.95 | 32.65 | 20.89 | 43.87 | ||||||||||||
1917 | 16.40 | 23.27 | 29.38 | a | 42.53 | 47.65 | 60.83 | 69.84 | 66.21 | 62.67 | 48.44 | 38.17 | a | 33.35 | 44.90 | |||||||||||
1918 | 20.80 | a | 31.04 | 41.06 | 43.93 | 51.48 | a | 67.90 | 69.23 | a | 66.90 | 57.88 | a | 49.97 | 32.69 | a | 22.17 | a | 46.25 | |||||||
1919 | 15.39 | 22.55 | 33.15 | 47.40 | a | 54.97 | 62.20 | 68.89 | 67.11 | 60.67 | a | 43.37 | 37.04 | b | 26.40 | 44.93 | ||||||||||
1920 | 25.18 | 33.45 | a | 35.06 | 38.03 | 51.92 | 59.09 | a | 67.10 | 63.35 | 55.45 | 44.21 | 35.00 | 22.84 | 44.22 | |||||||||||
1921 | 27.53 | 31.07 | a | 40.44 | 41.47 | 51.68 | 60.70 | 67.02 | 64.32 | 56.98 | 49.23 | 36.20 | 31.52 | 46.51 | ||||||||||||
1922 | 21.94 | 26.84 | 33.15 | 41.52 | 51.73 | 62.92 | 68.18 | 68.28 | a | 60.48 | 46.26 | 33.02 | 30.60 | f | 46.75 | a | ||||||||||
1923 | 27.26 | 27.00 | 33.58 | 43.03 | 52.82 | 58.68 | 69.02 | 64.05 | 54.27 | 44.02 | 35.45 | 26.47 | 44.64 | |||||||||||||
1924 | 16.03 | 32.55 | 30.89 | 42.55 | 52.03 | 61.72 | 66.27 | 63.65 | 56.12 | a | 45.85 | 37.10 | 18.18 | 43.58 | ||||||||||||
1925 | 15.87 | 29.43 | 37.92 | a | 46.20 | 54.78 | a | 59.87 | 67.82 | 61.41 | b | 56.68 | 45.76 | 33.23 | 27.87 | 44.74 | ||||||||||
1926 | 21.25 | e | 33.56 | c | 37.52 | 46.98 | c | 52.27 | 62.15 | 65.79 | 66.19 | 58.13 | 49.26 | 35.68 | 25.37 | 46.18 | ||||||||||
1927 | 30.97 | 32.54 | 36.25 | a | 42.88 | e | 52.88 | n | 59.00 | f | 66.84 | o | 62.97 | 56.85 | g | 47.94 | 38.87 | 23.34 | b | 39.47 | d | |||||
1928 | 23.77 | 30.79 | 39.55 | a | 42.37 | g | 55.47 | b | 62.26 | e | 67.65 | a | 64.26 | 59.63 | 50.68 | i | 39.21 | a | 23.90 | 46.65 | b | |||||
1929 | 19.40 | a | 23.46 | a | 40.03 | 44.66 | a | 53.21 | 63.00 | f | 69.82 | 66.45 | b | 57.57 | 48.47 | a | 31.72 | a | 29.00 | 43.98 | a | |||||
1930 | 19.26 | 30.21 | 36.16 | 49.27 | 51.39 | 62.78 | 68.34 | 66.60 | 57.92 | 46.18 | 33.02 | 24.40 | a | 45.46 | ||||||||||||
1931 | 24.23 | 34.96 | 35.45 | 45.77 | b | 52.68 | 63.73 | 69.56 | 67.08 | 61.13 | 50.02 | a | 33.55 | a | 14.47 | 46.05 | ||||||||||
1932 | 12.74 | 31.25 | a | 36.44 | 46.14 | i | 52.78 | b | 58.98 | 67.52 | g | 65.73 | i | 57.47 | 46.50 | 36.37 | 20.13 | 39.18 | c | |||||||
1933 | 17.40 | 14.55 | 37.67 | a | 41.08 | 48.94 | 63.30 | 69.13 | 66.19 | 61.88 | 50.92 | 38.71 | a | 31.32 | 45.09 | |||||||||||
1934 | 29.92 | 36.98 | 42.03 | 48.20 | 58.77 | 60.52 | 69.87 | 69.21 | 57.52 | 49.82 | 36.79 | a | 29.63 | 49.11 | ||||||||||||
1935 | 28.97 | 32.91 | 36.12 | a | 45.45 | 51.29 | 62.85 | 69.47 | 68.44 | 60.60 | a | 48.10 | 35.52 | 27.35 | 47.26 | |||||||||||
1936 | 24.71 | 30.98 | f | 38.82 | i | 45.93 | a | 56.89 | 65.57 | 69.82 | 68.11 | 60.40 | 47.57 | b | 36.50 | 29.05 | 50.45 | b | ||||||||
1937 | 11.19 | 20.27 | b | 34.24 | 46.06 | e | 55.82 | 61.20 | 67.73 | 68.90 | 61.38 | 50.41 | b | 37.68 | 30.69 | 45.47 | ||||||||||
1938 | 27.87 | 31.05 | 38.05 | 45.60 | 51.19 | 62.57 | 66.32 | 66.79 | 59.48 | 49.31 | 29.82 | 28.85 | 46.41 | |||||||||||||
1939 | 25.63 | 16.43 | 36.62 | a | 48.27 | 54.68 | 61.74 | a | 68.80 | a | 67.27 | 61.87 | 47.62 | b | 38.98 | 30.08 | 46.50 | |||||||||
1940 | 23.27 | 28.90 | 39.97 | 46.58 | 55.97 | 64.55 | 69.24 | 66.71 | 60.30 | 49.73 | a | 35.08 | 28.29 | b | 47.38 | |||||||||||
1941 | 23.97 | 33.50 | 38.79 | 42.67 | 55.24 | b | 59.53 | 66.75 | a | 66.89 | 57.43 | 48.08 | 37.07 | a | 29.98 | 46.66 | ||||||||||
1942 | 21.77 | 26.16 | 34.44 | 48.40 | a | 52.40 | 60.84 | a | 69.02 | 68.02 | 60.08 | 49.07 | b | 38.28 | 29.77 | 46.52 | ||||||||||
1943 | 25.11 | 28.34 | 38.32 | 51.07 | 54.19 | 61.73 | 68.83 | b | 69.16 | 60.72 | a | 48.35 | 36.70 | 28.08 | a | 47.55 | ||||||||||
1944 | 23.02 | a | 29.10 | 35.44 | 42.87 | 54.63 | 60.32 | 67.48 | 66.79 | 59.50 | 49.63 | a | 36.14 | a | 28.22 | b | 46.09 | |||||||||
1945 | 22.16 | 31.50 | 33.66 | 41.28 | 53.03 | a | 57.55 | k | 67.17 | a | 68.34 | 58.13 | 48.42 | a | 32.62 | 19.27 | 43.24 | a | ||||||||
1946 | 18.87 | 27.32 | 39.03 | 49.75 | 51.97 | 62.47 | 68.32 | 66.10 | 57.93 | 44.00 | 33.17 | 30.31 | 45.77 | |||||||||||||
1947 | 17.02 | 32.14 | 36.42 | 43.40 | 54.27 | 58.65 | 69.69 | 64.81 | 58.33 | o | 48.61 | 28.62 | b | 24.02 | a | 43.42 | a | |||||||||
1948 | 24.32 | 27.50 | ----- | z | 44.81 | a | 52.26 | n | 60.67 | 65.56 | 66.00 | a | 60.87 | 49.74 | 31.07 | 27.68 | 45.82 | b | ||||||||
1949 | 20.40 | a | 22.57 | 37.24 | 47.20 | 53.06 | 60.45 | 67.92 | 65.63 | 60.55 | 46.85 | 40.62 | 25.66 | 45.68 | ||||||||||||
1950 | 24.69 | e | 37.48 | c | 36.94 | 46.69 | a | 50.76 | 61.97 | 66.24 | 63.95 | 55.83 | 51.47 | b | 37.23 | j | 30.85 | 47.90 | a | |||||||
1951 | 25.35 | e | 30.04 | 37.03 | 44.87 | 54.47 | 59.28 | 70.15 | 65.82 | 56.65 | 47.58 | a | 34.72 | g | 19.48 | c | 46.43 | a | ||||||||
1952 | 23.32 | 23.38 | c | 31.89 | h | 46.97 | 53.41 | d | 62.71 | d | 67.37 | 67.84 | 60.52 | ----- | z | 30.33 | d | 25.70 | c | 46.15 | b | |||||
1953 | 28.32 | k | 29.82 | 35.83 | e | 40.60 | d | 50.35 | e | 63.27 | d | 69.31 | 64.85 | 58.72 | 51.23 | g | 37.80 | 20.24 | f | 50.06 | c | |||||
1954 | 27.16 | 35.24 | e | 35.04 | d | 48.92 | 55.61 | 62.16 | a | 70.73 | 65.81 | 60.76 | a | 50.80 | c | 39.35 | 27.45 | a | 48.25 | |||||||
1955 | 21.55 | 21.04 | 34.44 | d | 41.50 | j | 50.38 | b | 60.27 | 67.05 | 68.27 | 60.28 | 50.21 | j | 34.08 | 27.97 | b | 44.53 | b | |||||||
1956 | 32.55 | b | 24.34 | 37.88 | f | 45.02 | g | 54.11 | c | 64.93 | a | 67.80 | h | 62.64 | i | 59.11 | k | 46.25 | c | 30.80 | e | 26.16 | c | 39.88 | e | |
1957 | 26.57 | a | 33.50 | 36.58 | 41.93 | 49.02 | 60.70 | 66.98 | 65.06 | 56.34 | e | 47.88 | a | 31.07 | 28.21 | b | 45.32 | |||||||||
1958 | 25.56 | 32.11 | 33.66 | 42.17 | 54.13 | e | 64.07 | 67.10 | e | 68.08 | 57.00 | o | 49.23 | 36.90 | 31.39 | 45.85 | a | |||||||||
1959 | 27.65 | d | 29.00 | 35.76 | 45.97 | a | 53.56 | 65.34 | b | 69.34 | 66.92 | 57.58 | 47.94 | d | 35.23 | 29.68 | 47.00 | |||||||||
1960 | 18.00 | 21.86 | 37.11 | 45.78 | 51.48 | a | 62.22 | 68.69 | 67.42 | 61.95 | 47.61 | 36.32 | 25.76 | 45.35 | ||||||||||||
1961 | 23.79 | 30.59 | 37.18 | 43.48 | 53.92 | 64.48 | 68.34 | 67.77 | a | 54.73 | h | 45.41 | o | 34.93 | 20.52 | 44.50 | b | |||||||||
1962 | 20.85 | 31.57 | 32.87 | 47.83 | 52.48 | 61.63 | 67.39 | 66.18 | 60.37 | 50.40 | 40.12 | 30.48 | 46.85 | |||||||||||||
1963 | 15.97 | 32.32 | 36.65 | 44.23 | 56.15 | 60.57 | 70.21 | 66.60 | 61.42 | 52.52 | 37.45 | 26.06 | 46.68 | |||||||||||||
1964 | 22.13 | 24.29 | 32.33 | a | 41.87 | 53.03 | 60.30 | 69.84 | 65.03 | 57.60 | 49.81 | 34.70 | 23.97 | a | 44.57 | |||||||||||
1965 | 26.24 | 27.07 | 33.65 | 43.57 | a | 50.68 | 57.83 | 67.16 | 64.44 | 54.65 | 49.95 | 39.55 | 28.95 | 45.31 | ||||||||||||
1966 | 18.84 | 21.45 | 37.13 | 45.20 | 54.31 | d | 60.89 | c | 68.89 | 64.52 | c | 57.38 | n | 44.64 | c | 37.62 | m | 33.64 | t | 46.21 | c | |||||
1967 | 22.03 | n | 32.76 | i | 40.89 | h | 43.90 | o | 54.21 | q | 59.12 | d | 69.02 | c | 62.98 | e | 56.57 | o | 48.85 | k | 37.40 | o | 27.07 | q | 63.70 | i |
1968 | 23.87 | p | 29.68 | j | 35.35 | k | 38.58 | l | 51.33 | s | 61.39 | h | 65.50 | i | 61.39 | q | 52.85 | m | 48.93 | j | 37.29 | r | 25.35 | r | ----- | z |
1969 | 28.79 | q | 29.07 | f | 31.89 | 46.23 | 54.29 | c | 59.61 | b | 69.64 | c | 69.74 | 59.34 | a | 44.83 | a | 35.02 | 30.33 | d | 50.09 | b | ||||
1970 | 26.42 | 34.12 | 31.83 | h | 37.83 | 52.44 | 59.41 | a | 67.06 | 68.44 | 55.08 | 43.06 | 36.18 | 25.93 | c | 46.00 | a | |||||||||
1971 | 19.30 | d | 28.62 | 35.58 | a | 42.63 | 49.53 | 62.02 | 68.34 | 66.18 | 55.35 | 45.11 | 33.95 | 21.53 | a | 44.01 | ||||||||||
1972 | 24.47 | 31.90 | 40.94 | 44.10 | 53.21 | 62.67 | 69.00 | 66.18 | 58.50 | 49.89 | 30.38 | 17.98 | b | 45.77 | ||||||||||||
1973 | 16.15 | 26.93 | 33.95 | a | 40.33 | 52.02 | 60.10 | 66.74 | 66.73 | 55.40 | 47.48 | 35.86 | a | 26.40 | 44.01 | |||||||||||
1974 | 17.75 | c | 18.27 | 38.35 | 41.22 | 53.82 | 64.43 | 67.47 | a | 64.03 | 58.30 | 50.37 | 35.43 | 24.52 | 44.50 | |||||||||||
1975 | 16.39 | 23.78 | a | 33.52 | 40.40 | 49.73 | 58.30 | 67.95 | 63.90 | 57.28 | 46.42 | 33.65 | 23.71 | 42.92 | ||||||||||||
1976 | 20.16 | 33.05 | 34.42 | 44.58 | 53.63 | 60.88 | ----- | z | 63.98 | 58.12 | 43.68 | 33.78 | 24.73 | 42.82 | a | |||||||||||
1977 | 16.50 | 30.52 | 32.44 | 45.53 | 51.27 | 65.25 | 68.42 | 67.42 | 59.38 | 48.55 | 36.58 | 29.08 | 45.91 | |||||||||||||
1978 | 24.29 | 26.00 | 39.21 | 45.60 | 49.03 | 61.85 | 69.48 | 65.19 | 58.55 | 49.55 | 37.83 | 17.60 | a | 45.35 | ||||||||||||
1979 | 14.74 | 19.82 | 33.08 | 44.02 | ----- | z | 60.47 | 67.05 | 64.15 | 60.85 | ----- | z | ----- | z | 28.63 | 43.64 | c | |||||||||
1980 | 26.52 | 29.09 | 33.90 | f | 43.33 | 50.66 | 62.97 | 67.94 | 63.74 | 56.79 | a | 43.10 | a | 37.38 | n | 30.82 | c | 47.50 | b | |||||||
1981 | 30.85 | 32.02 | b | 35.50 | a | 46.97 | 52.60 | 64.40 | 69.27 | 66.76 | 60.75 | 48.11 | 37.20 | c | 28.87 | 47.78 | ||||||||||
1982 | 19.17 | d | 24.74 | a | 33.95 | b | 42.38 | a | 51.10 | 56.83 | 65.61 | 63.52 | 49.82 | 41.79 | 34.98 | 26.11 | 42.50 | |||||||||
1983 | 28.27 | 33.07 | 38.63 | 40.38 | 50.35 | 60.70 | 69.48 | 71.58 | 63.18 | 50.37 | 34.70 | 28.39 | 47.43 | |||||||||||||
1984 | 21.53 | 27.93 | 37.10 | 38.80 | 59.05 | 64.71 | a | 72.69 | 67.92 | 61.48 | 44.27 | 40.76 | a | 31.31 | 47.30 | |||||||||||
1985 | 28.71 | 28.78 | a | 38.63 | 46.72 | 54.26 | 65.10 | 71.08 | 69.10 | 56.63 | 49.50 | 34.47 | 26.68 | 47.47 | ||||||||||||
1986 | 33.03 | 38.09 | f | 42.03 | 45.53 | 53.00 | 65.17 | 66.75 | m | 68.94 | 56.72 | a | 46.63 | 37.50 | b | 30.65 | 47.92 | b | ||||||||
1987 | 24.96 | d | 34.33 | b | 35.00 | 48.00 | 54.36 | b | 64.88 | e | ----- | z | ----- | z | ----- | z | 50.89 | 37.76 | a | 27.74 | 41.99 | c | ||||
1988 | 20.19 | 29.79 | 36.05 | 46.58 | 53.89 | c | 67.43 | 70.76 | 68.34 | 58.50 | 52.73 | 35.42 | 26.40 | 47.17 | ||||||||||||
1989 | ----- | z | 35.70 | m | 42.65 | 49.42 | 55.77 | 63.20 | 70.89 | 66.65 | 61.37 | 47.40 | a | 36.55 | 27.08 | 52.10 | b | |||||||||
1990 | 23.55 | b | 30.50 | b | 40.22 | b | 47.20 | 52.17 | a | 64.33 | 66.61 | 64.40 | 61.00 | 46.50 | 35.43 | 15.19 | d | 45.59 | ||||||||
1991 | 19.29 | b | 29.63 | a | 35.35 | a | 41.25 | b | 51.97 | 59.37 | 67.02 | 66.52 | 57.75 | 48.02 | 32.45 | 26.34 | 44.58 | |||||||||
1992 | 20.32 | 31.83 | 39.32 | 47.83 | 54.13 | e | 59.83 | 65.58 | 64.85 | 57.37 | 49.37 | 32.12 | v | ----- | z | 49.04 | b | |||||||||
1993 | 24.58 | 27.88 | 37.77 | a | 43.30 | 52.56 | 59.50 | 65.39 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.93 | f | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.46 | 28.51 | 36.42 | 44.63 | 52.86 | 61.75 | 68.25 | 66.21 | 58.61 | 47.80 | 35.47 | 26.25 | 45.75 | |||||||||||||
S.D. | 4.73 | 4.80 | 2.78 | 2.87 | 2.21 | 2.32 | 1.57 | 1.93 | 2.39 | 2.40 | 2.69 | 4.09 | 1.43 | |||||||||||||
SKEW | -0.02 | -0.69 | 0.04 | -0.20 | 0.20 | 0.32 | 0.06 | 0.06 | -0.64 | -0.39 | -0.33 | -0.90 | -0.10 | |||||||||||||
MAX | 33.03 | 37.48 | 42.65 | 51.07 | 59.05 | 67.90 | 72.69 | 71.58 | 63.18 | 52.73 | 40.76 | 33.35 | 49.11 | |||||||||||||
MIN | 11.19 | 14.55 | 29.38 | 37.83 | 47.65 | 56.83 | 64.50 | 61.41 | 49.82 | 41.79 | 28.63 | 14.47 | 42.50 | |||||||||||||
YRS | 74 | 73 | 72 | 74 | 75 | 76 | 72 | 75 | 70 | 71 | 71 | 73 | 49 |