YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.37 | 66.69 | 59.45 | 47.44 | 33.40 | 21.63 | 49.83 | f | ||||||
1931 | 24.61 | 34.09 | 32.60 | 44.15 | 51.42 | 67.13 | 71.97 | 68.18 | 64.87 | 50.74 | 33.43 | 29.81 | 47.75 | |||||||||||||
1932 | 23.21 | 35.84 | 29.35 | 47.02 | 55.45 | 62.42 | 71.44 | 69.68 | 59.32 | 45.77 | 40.33 | 23.91 | h | 49.08 | a | |||||||||||
1933 | 30.58 | 24.21 | 39.21 | 40.95 | 51.58 | 67.20 | 70.97 | 67.44 | 64.22 | 52.31 | 40.72 | 36.19 | 48.80 | |||||||||||||
1934 | 34.29 | 32.29 | 40.94 | 46.68 | 60.15 | 65.98 | 73.32 | 70.15 | 57.03 | 52.32 | 37.38 | 28.32 | 49.90 | |||||||||||||
1935 | 33.89 | 32.38 | 38.52 | 42.14 | b | 46.66 | 61.33 | 68.73 | 68.08 | 57.83 | a | 46.48 | c | 33.62 | 26.98 | 46.39 | ||||||||||
1936 | 25.90 | 23.67 | 35.97 | 44.52 | a | 54.94 | 65.28 | 70.31 | 67.44 | 57.97 | 44.47 | 34.70 | 29.35 | 46.21 | ||||||||||||
1937 | 12.87 | a | 28.20 | a | 31.41 | b | 40.62 | f | 51.89 | 58.07 | a | 67.61 | 69.97 | 60.30 | 47.63 | 34.23 | 26.16 | 44.39 | a | |||||||
1938 | 26.50 | 31.07 | 37.48 | 42.70 | 49.26 | 61.58 | 65.44 | e | 67.60 | 57.77 | 48.21 | 28.90 | 26.23 | 45.23 | ||||||||||||
1939 | 22.76 | 15.46 | 31.39 | 42.10 | 52.73 | a | 62.83 | c | 69.87 | 65.42 | a | 61.08 | 46.18 | 34.98 | 30.73 | 44.63 | ||||||||||
1940 | 15.84 | 25.02 | a | 34.14 | b | 40.85 | 51.50 | 61.50 | 66.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.23 | e | |||||
1941 | 24.78 | b | 29.48 | 29.87 | 39.32 | 51.48 | 59.65 | 69.89 | 68.61 | 58.78 | 47.39 | 38.27 | 30.11 | 45.64 | ||||||||||||
1942 | 21.76 | 17.52 | 30.90 | 47.02 | 51.97 | a | 60.60 | 68.37 | 66.35 | 57.70 | b | 45.19 | b | 38.38 | 30.40 | 44.68 | ||||||||||
1943 | 28.05 | 33.79 | 31.75 | a | 50.63 | 50.77 | 63.68 | 72.42 | a | 71.27 | 59.25 | 47.98 | 36.47 | 29.44 | 47.96 | |||||||||||
1944 | 26.34 | 28.28 | 31.61 | 38.57 | 54.73 | 63.88 | 68.02 | 69.06 | 60.68 | 50.56 | ----- | z | ----- | z | 49.17 | b | ||||||||||
1945 | ----- | z | ----- | z | ----- | z | ----- | z | 55.35 | a | 58.95 | 69.85 | 68.58 | a | 57.85 | 51.10 | 38.50 | 27.08 | 53.41 | d | ||||||
1946 | ----- | z | 30.70 | 41.68 | 52.35 | 49.35 | e | 66.62 | 71.35 | a | 68.79 | 60.92 | 47.81 | 30.80 | 34.94 | 50.48 | a | |||||||||
1947 | 28.50 | 27.20 | 33.76 | 43.52 | a | 53.84 | 59.40 | 69.27 | 69.45 | 64.00 | 52.93 | b | 32.47 | 31.21 | 47.13 | |||||||||||
1948 | 25.52 | 24.60 | 28.94 | 47.23 | 55.24 | 63.10 | 70.63 | 69.74 | b | 65.27 | 49.31 | 33.10 | 29.95 | 46.89 | ||||||||||||
1949 | 17.63 | 28.71 | 36.98 | 46.65 | 54.13 | 61.77 | 68.66 | 68.39 | 60.80 | 47.66 | 44.13 | 30.24 | 47.15 | |||||||||||||
1950 | 29.77 | 35.57 | 34.60 | 44.88 | 49.92 | 63.32 | 67.11 | 66.87 | 59.52 | 58.42 | 37.23 | 34.92 | 48.51 | |||||||||||||
1951 | 23.40 | 32.11 | 33.94 | 42.12 | 55.23 | 58.28 | 71.42 | 67.66 | 59.93 | 47.34 | 34.33 | g | 26.50 | 47.08 | a | |||||||||||
1952 | 32.45 | 31.19 | 31.92 | 45.43 | 54.03 | 68.53 | 71.47 | a | 70.68 | 62.82 | 51.37 | 29.70 | 28.68 | 48.19 | ||||||||||||
1953 | 34.98 | 30.59 | 40.15 | 40.60 | 49.85 | 67.40 | 73.94 | 70.34 | ----- | z | 52.98 | 40.35 | 26.08 | 47.93 | a | |||||||||||
1954 | 31.73 | 41.86 | 33.60 | 51.83 | 53.96 | h | 66.50 | 74.27 | 68.29 | 64.55 | 49.26 | 40.48 | 32.65 | a | 50.46 | a | ||||||||||
1955 | 25.84 | 27.34 | 37.32 | a | 46.88 | 56.21 | 61.75 | 72.48 | 69.77 | 61.68 | 51.63 | 32.72 | 33.90 | 48.13 | ||||||||||||
1956 | 32.40 | 24.29 | 36.87 | 43.93 | 58.37 | 71.55 | 70.40 | 66.27 | 63.60 | 53.42 | 32.97 | 31.61 | 48.81 | |||||||||||||
1957 | 23.55 | a | 37.57 | a | 35.94 | 39.12 | 51.26 | 62.50 | 69.55 | 68.10 | 58.05 | 49.66 | 33.05 | 36.45 | a | 47.07 | ||||||||||
1958 | 27.87 | 34.59 | 29.18 | 41.03 | 58.50 | 65.28 | 67.94 | 70.94 | 61.75 | 50.26 | 38.62 | 33.06 | 48.25 | |||||||||||||
1959 | 28.39 | 29.04 | 33.26 | 43.71 | a | 53.23 | 66.32 | 69.61 | 70.58 | 58.37 | 45.08 | 34.92 | 32.45 | 47.08 | ||||||||||||
1960 | 22.90 | 18.97 | 32.61 | 46.07 | 52.82 | 64.85 | 68.95 | 69.05 | 62.03 | 49.74 | 37.50 | 26.84 | 46.03 | |||||||||||||
1961 | 27.74 | 32.23 | 35.81 | 42.63 | 53.87 | 62.92 | 68.81 | 68.66 | 53.88 | 47.71 | 33.68 | 25.42 | 46.11 | |||||||||||||
1962 | 20.87 | 31.25 | 33.53 | 48.38 | 56.97 | 61.78 | 69.76 | 70.31 | 60.40 | 51.48 | 40.40 | 32.15 | 48.11 | |||||||||||||
1963 | 17.21 | 35.38 | 37.39 | 50.40 | 58.74 | 65.93 | 73.31 | 67.61 | 64.10 | 55.82 | 41.18 | 28.26 | 49.61 | |||||||||||||
1964 | 28.11 | 23.78 | 30.03 | 44.54 | b | 55.65 | 62.25 | 73.21 | 67.73 | 59.68 | 50.40 | 38.27 | 32.85 | 47.21 | ||||||||||||
1965 | 36.95 | 27.89 | 25.63 | 46.65 | 54.32 | 61.86 | b | 68.66 | 65.37 | 53.72 | 51.82 | 44.43 | 35.77 | 47.76 | ||||||||||||
1966 | 27.39 | 27.64 | 41.31 | 45.08 | 57.98 | 64.72 | 73.29 | 66.94 | 60.80 | 49.50 | 41.13 | 31.13 | 48.91 | |||||||||||||
1967 | 32.21 | 33.61 | 41.16 | 47.24 | a | 51.73 | 59.20 | 66.77 | 64.31 | 58.50 | 51.66 | 39.35 | 27.05 | a | 47.73 | |||||||||||
1968 | 30.31 | 34.29 | 39.13 | 41.43 | 51.58 | 65.90 | 69.19 | 65.98 | a | 59.22 | 52.26 | 35.55 | 28.76 | 47.80 | ||||||||||||
1969 | 33.18 | 34.09 | 29.47 | 49.90 | 56.24 | 57.42 | 70.74 | 70.13 | 61.07 | 38.27 | 34.60 | 30.74 | 47.15 | |||||||||||||
1970 | 28.76 | 39.00 | 31.48 | h | 40.73 | 55.87 | 61.35 | 70.02 | 70.74 | 59.03 | 45.19 | 37.83 | 33.19 | 49.25 | a | |||||||||||
1971 | 30.50 | 28.46 | 36.89 | 45.48 | 51.42 | 66.50 | 68.27 | 69.39 | 56.50 | 48.65 | 38.20 | 30.18 | 47.54 | |||||||||||||
1972 | 29.44 | 35.14 | 41.98 | 46.65 | 53.06 | 65.32 | 67.77 | 66.32 | 59.70 | 49.47 | 28.15 | 22.71 | 47.14 | |||||||||||||
1973 | 22.56 | 29.14 | 34.42 | 39.78 | 52.24 | 63.30 | 67.21 | 69.00 | 56.68 | 51.53 | 39.98 | 31.23 | 46.42 | |||||||||||||
1974 | 26.71 | 31.36 | 42.34 | 45.42 | 58.54 | c | 66.20 | 71.84 | 67.40 | 58.40 | 52.47 | 38.27 | 30.31 | 49.10 | ||||||||||||
1975 | 31.26 | 30.59 | 36.92 | 42.87 | 51.97 | 61.77 | 70.60 | 70.27 | 59.60 | 55.23 | 36.48 | 35.55 | 48.59 | |||||||||||||
1976 | 31.58 | 37.76 | 36.15 | a | ----- | z | 54.19 | 64.85 | 72.00 | 68.31 | 60.22 | 46.55 | 37.18 | 34.29 | 49.37 | a | ||||||||||
1977 | 27.27 | 35.00 | 34.48 | 46.27 | 57.03 | 68.60 | 72.65 | 68.68 | 65.68 | 53.21 | 38.23 | 33.82 | 50.08 | |||||||||||||
1978 | 26.27 | 29.84 | 41.32 | 46.68 | 52.27 | 65.24 | a | 73.34 | 68.84 | 65.07 | 53.53 | 37.85 | 24.56 | 48.74 | ||||||||||||
1979 | 18.02 | 33.36 | 37.87 | 46.90 | a | 52.00 | 63.75 | 71.27 | 68.08 | 65.45 | 53.29 | 31.60 | 35.53 | a | 48.09 | |||||||||||
1980 | 25.88 | a | 33.62 | 35.21 | 43.37 | 52.34 | 69.48 | 73.34 | 70.63 | 64.50 | 51.13 | 39.73 | 40.69 | b | 49.99 | |||||||||||
1981 | 36.57 | d | 34.54 | 36.97 | 52.93 | 52.65 | 66.63 | 71.50 | 68.48 | 65.33 | 50.90 | 43.60 | 33.79 | 51.16 | ||||||||||||
1982 | 29.92 | 30.57 | 39.29 | 46.37 | 53.06 | 60.25 | 70.89 | 70.45 | 61.72 | 48.27 | 36.00 | a | 32.42 | 48.27 | ||||||||||||
1983 | 33.21 | 34.20 | 34.10 | 38.69 | a | 50.05 | a | 60.78 | c | 70.73 | 71.24 | 64.47 | 53.55 | 37.37 | 18.45 | 47.24 | ||||||||||
1984 | 28.58 | a | 31.34 | a | 34.63 | 40.22 | 57.45 | 63.43 | 71.97 | 69.65 | 60.17 | 43.44 | 40.52 | 33.42 | 47.90 | |||||||||||
1985 | 26.11 | 27.36 | 38.10 | 48.52 | a | 56.29 | 65.28 | a | 70.05 | 70.69 | b | 57.20 | 51.00 | e | 31.66 | a | 29.02 | 47.60 | ||||||||
1986 | 41.18 | a | 34.00 | 45.67 | a | 47.60 | 54.10 | a | 66.57 | 71.08 | 69.61 | 59.72 | 49.35 | 38.78 | 30.30 | a | 50.66 | |||||||||
1987 | 30.98 | 34.25 | 35.89 | 50.20 | 56.00 | a | 66.43 | 71.65 | 68.50 | 61.35 | 51.41 | b | 40.07 | b | 28.83 | a | 49.63 | |||||||||
1988 | 25.43 | b | 32.09 | 35.79 | b | 48.73 | b | 56.50 | c | 68.33 | 72.79 | 71.58 | 61.83 | a | 54.81 | 39.98 | a | 31.09 | b | 49.91 | ||||||
1989 | 34.67 | a | 22.25 | b | 43.34 | 48.93 | 58.05 | 62.68 | 73.07 | a | 68.61 | 60.36 | a | 51.25 | a | 42.77 | 28.15 | 49.51 | ||||||||
1990 | 34.66 | b | 32.54 | 38.29 | 47.45 | a | 53.74 | 69.25 | 68.84 | b | 69.24 | 65.88 | a | 52.80 | a | 43.73 | 26.29 | 50.23 | ||||||||
1991 | 28.17 | a | 39.93 | 40.06 | 46.65 | 57.85 | d | 67.47 | 70.34 | 69.40 | 61.92 | 52.12 | a | 35.61 | h | 32.29 | 51.47 | a | ||||||||
1992 | 30.68 | c | 36.83 | 41.62 | c | 53.44 | c | 57.37 | 62.22 | 68.17 | b | 67.48 | e | 64.80 | 55.11 | c | 33.43 | b | 27.53 | 49.89 | ||||||
1993 | 28.38 | a | 29.02 | b | 42.12 | b | 46.44 | d | 56.11 | c | 64.62 | b | 70.59 | c | 67.98 | c | 60.44 | f | 48.66 | c | 34.07 | a | 35.33 | b | 47.58 | a |
1994 | 33.07 | a | 33.10 | d | 43.59 | b | 47.34 | b | 59.50 | d | 70.08 | e | 71.23 | c | 72.20 | c | 64.64 | e | 50.74 | b | 39.64 | e | 38.07 | c | 51.93 | |
1995 | 33.74 | d | 39.11 | f | 40.74 | f | 45.22 | e | 48.75 | g | 63.83 | f | 69.55 | c | 74.45 | b | 64.91 | h | 51.91 | c | 45.88 | f | 34.57 | d | 51.57 | f |
1996 | 27.67 | h | 38.20 | d | 39.71 | e | 46.44 | f | 59.37 | e | 67.16 | b | 72.43 | c | 70.73 | c | 60.77 | b | 53.89 | h | 41.61 | h | 36.60 | g | 58.34 | e |
1997 | 30.33 | h | 32.71 | b | 44.30 | d | 42.83 | g | 56.60 | b | 66.18 | b | 72.42 | a | 69.05 | a | 64.50 | a | 52.10 | f | 34.98 | c | 28.41 | b | 52.13 | c |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.00 | 30.95 | 36.26 | 45.34 | 54.22 | 64.14 | 70.47 | 68.86 | 60.85 | 50.08 | 36.94 | 30.53 | 48.05 | |||||||||||||
S.D. | 5.37 | 5.13 | 4.39 | 3.64 | 2.95 | 3.15 | 1.99 | 1.77 | 2.92 | 3.34 | 3.81 | 4.01 | 1.60 | |||||||||||||
SKEW | -0.42 | -0.71 | -0.04 | 0.08 | -0.03 | -0.03 | -0.22 | 0.08 | -0.06 | -0.58 | -0.17 | -0.27 | 0.06 | |||||||||||||
MAX | 41.18 | 41.86 | 45.67 | 53.44 | 60.15 | 71.55 | 74.27 | 74.45 | 65.88 | 58.42 | 44.43 | 40.69 | 51.93 | |||||||||||||
MIN | 12.87 | 15.46 | 25.63 | 38.57 | 46.66 | 57.42 | 65.44 | 64.31 | 53.72 | 38.27 | 28.15 | 18.45 | 44.63 | |||||||||||||
YRS | 63 | 65 | 64 | 62 | 65 | 66 | 68 | 67 | 64 | 65 | 62 | 64 | 51 |