YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | ----- | z | ----- | z | 40.14 | x | 42.45 | 60.03 | 67.67 | 72.60 | 69.95 | 64.15 | 50.00 | 36.92 | 30.24 | 54.89 | c | |||||||||
1940 | 10.45 | a | 21.71 | 25.58 | 41.68 | 53.71 | 65.45 | 71.35 | 67.74 | 60.95 | 51.63 | 32.34 | a | 23.84 | b | 43.87 | ||||||||||
1941 | 20.90 | 17.48 | 25.98 | 50.63 | 59.82 | 66.30 | 70.89 | 68.98 | a | 63.03 | 50.50 | 37.75 | 28.81 | 46.76 | ||||||||||||
1942 | 17.52 | 18.80 | 34.27 | a | 49.87 | 54.71 | 64.97 | 69.10 | 67.50 | 58.95 | 50.39 | 34.79 | b | 17.73 | 44.88 | |||||||||||
1943 | 13.60 | 19.24 | a | 25.69 | 43.16 | a | 55.21 | 69.42 | 72.08 | 70.44 | 57.18 | 49.27 | 31.53 | 26.09 | b | 44.41 | ||||||||||
1944 | 25.89 | 22.90 | 27.08 | 41.52 | 61.00 | 68.87 | 69.85 | 70.18 | 62.05 | 49.18 | 40.66 | b | 17.66 | 46.40 | ||||||||||||
1945 | 14.05 | 19.95 | 43.18 | a | 46.60 | 52.37 | 61.18 | 68.11 | 69.27 | 59.68 | 47.13 | 34.80 | 16.97 | a | 44.44 | |||||||||||
1946 | 21.13 | a | 21.07 | 40.47 | 47.60 | 54.58 | 65.42 | 71.69 | 67.97 | 61.05 | 53.76 | 37.12 | 25.90 | a | 47.31 | |||||||||||
1947 | 22.44 | 16.73 | 29.21 | 42.80 | 51.19 | 62.97 | a | 69.36 | b | 75.45 | a | 63.12 | 59.68 | 29.53 | a | 22.56 | 45.42 | |||||||||
1948 | 13.03 | a | 17.69 | 29.32 | 49.63 | 55.25 | a | 65.55 | 72.78 | a | 70.95 | 65.07 | 48.68 | 39.12 | 23.27 | 45.86 | ||||||||||
1949 | 20.80 | a | 19.12 | 30.69 | 46.10 | 57.74 | 69.50 | 73.13 | 68.98 | 54.45 | 52.40 | 34.25 | 24.41 | b | 45.97 | |||||||||||
1950 | 20.24 | 20.82 | 26.56 | 38.72 | 55.76 | 66.25 | 67.74 | 63.68 | a | 58.75 | 53.31 | 30.16 | a | 14.26 | 43.02 | |||||||||||
1951 | 13.18 | 18.70 | 27.18 | 43.37 | 59.37 | a | 63.57 | a | 68.58 | 64.87 | 55.87 | 47.63 | 26.21 | a | 18.81 | 42.28 | ||||||||||
1952 | 18.50 | a | 25.59 | a | 29.03 | b | 48.85 | 55.61 | 68.02 | 72.52 | a | 67.40 | 60.69 | a | 42.73 | 37.32 | 26.60 | 46.07 | ||||||||
1953 | 22.79 | 23.29 | 32.45 | b | 41.81 | a | 56.79 | 67.97 | a | 71.08 | 69.61 | 60.60 | 54.63 | 40.25 | 26.56 | 47.32 | ||||||||||
1954 | 19.75 | a | 31.27 | 30.79 | 49.39 | b | 52.10 | a | 68.77 | 70.53 | b | 67.21 | 61.04 | b | 48.71 | g | 38.00 | 23.94 | 46.62 | a | ||||||
1955 | 17.87 | a | 20.71 | 29.66 | 51.70 | 59.43 | a | 64.98 | 74.66 | b | 73.37 | 61.58 | 50.87 | 31.05 | 18.55 | 46.20 | ||||||||||
1956 | 19.95 | 20.44 | c | 27.30 | a | 43.05 | 55.13 | 68.45 | a | 67.47 | b | 68.50 | 58.26 | c | 55.68 | 36.22 | a | 25.89 | 45.53 | |||||||
1957 | 14.81 | w | 24.91 | 31.92 | 46.55 | a | 54.89 | 66.46 | b | 72.55 | 69.52 | 59.62 | b | 48.42 | 34.78 | 26.53 | b | 48.74 | a | |||||||
1958 | 20.56 | 16.46 | 32.82 | 46.43 | 57.39 | 62.00 | 68.86 | b | 70.26 | 61.88 | a | 52.60 | 36.98 | 15.69 | 45.16 | |||||||||||
1959 | 10.58 | 14.61 | 26.53 | a | 44.30 | 61.55 | 67.62 | 68.56 | f | 74.33 | a | 63.45 | 46.40 | 26.92 | 30.31 | 42.42 | a | |||||||||
1960 | 22.19 | 20.59 | 19.45 | a | 48.02 | 55.61 | 63.90 | 69.42 | 70.58 | 63.83 | 49.52 | 39.22 | 21.15 | 45.29 | ||||||||||||
1961 | 17.69 | 27.79 | 34.55 | 42.37 | 54.66 | 67.48 | 71.16 | 70.60 | 63.63 | 52.05 | 36.20 | 18.87 | 46.42 | |||||||||||||
1962 | 12.11 | 16.73 | 29.06 | 45.35 | 62.23 | 65.72 | 67.73 | a | 69.84 | 58.50 | 52.31 | 36.42 | 21.15 | 44.76 | ||||||||||||
1963 | 6.98 | 13.48 | 32.27 | 48.27 | 55.06 | 68.55 | a | 72.26 | 67.84 | 61.37 | 59.08 | 40.88 | 13.52 | 44.96 | ||||||||||||
1964 | 24.05 | 24.16 | 30.42 | 47.08 | 62.35 | 67.75 | 72.39 | 67.06 | 59.88 | 48.21 | 39.35 | 19.48 | 46.85 | |||||||||||||
1965 | 15.39 | 17.54 | 25.29 | 42.43 | 61.63 | 65.40 | 69.32 | 67.73 | 59.82 | 50.37 | 37.00 | 29.98 | 45.16 | |||||||||||||
1966 | 9.98 | 20.98 | 35.65 | 43.30 | 53.10 | 67.87 | 73.37 | 67.77 | 59.68 | 49.56 | 36.85 | 21.44 | 44.96 | |||||||||||||
1967 | 20.77 | 14.62 | 32.15 | 45.92 | 52.37 | 67.52 | 68.47 | 64.61 | 59.40 | 48.84 | 32.95 | 25.06 | 44.39 | |||||||||||||
1968 | 19.31 | 18.31 | 39.95 | 48.10 | 54.98 | 66.48 | 70.53 | 69.61 | 61.97 | 52.06 | 36.02 | 21.56 | 46.57 | |||||||||||||
1969 | 14.39 | 22.45 | 26.68 | a | 46.75 | 58.03 | 59.37 | 70.05 | 71.19 | 60.30 | 47.10 | 33.00 | a | 21.13 | 44.20 | |||||||||||
1970 | 8.68 | 17.73 | 29.37 | 46.78 | 58.61 | 67.63 | 72.44 | 70.56 | 61.47 | 51.44 | 34.08 | 20.47 | 44.94 | |||||||||||||
1971 | 9.60 | 19.14 | 26.92 | 44.55 | 54.44 | 69.47 | 67.79 | 66.76 | 64.08 | 57.11 | 35.32 | 25.37 | 45.05 | |||||||||||||
1972 | 12.56 | 16.45 | 26.38 | a | 40.28 | 60.35 | 64.22 | 69.13 | 69.16 | 60.18 | 46.31 | 34.63 | 18.26 | 43.16 | ||||||||||||
1973 | 22.77 | 23.11 | 40.27 | 43.73 | 53.58 | 68.28 | 72.73 | 71.53 | 61.63 | 54.77 | 36.08 | 21.84 | 47.53 | |||||||||||||
1974 | 18.21 | 18.46 | 31.68 | 47.57 | 53.05 | 63.13 | 71.26 | 66.79 | 56.86 | a | 49.24 | 37.15 | 25.84 | 44.94 | ||||||||||||
1975 | 20.63 | 19.61 | 25.79 | 39.30 | 60.71 | 66.28 | 71.94 | ----- | z | ----- | z | ----- | z | 27.30 | t | 22.72 | a | 40.87 | d | |||||||
1976 | 12.89 | 25.79 | 33.10 | e | 48.45 | a | 54.79 | b | 69.00 | c | 71.92 | 66.40 | 58.02 | d | 39.19 | r | 26.10 | d | 9.29 | b | 43.25 | a | ||||
1977 | 2.82 | a | 21.60 | c | 38.34 | b | 51.68 | b | 65.04 | e | 62.89 | g | 73.60 | g | 64.52 | f | 60.32 | b | 48.28 | b | 34.59 | b | 17.95 | a | 37.85 | c |
1978 | 10.75 | a | 12.77 | 27.04 | d | 42.88 | b | 58.11 | c | 67.08 | d | 68.35 | a | 68.93 | a | 64.22 | 47.87 | a | 34.39 | b | 17.87 | a | 43.35 | |||
1979 | 4.73 | 8.83 | a | 29.34 | c | 41.71 | a | 54.40 | f | 63.83 | i | 70.83 | h | 66.55 | b | 61.88 | 47.90 | g | 34.00 | d | 27.72 | d | 34.35 | d | ||
1980 | 17.74 | f | 17.58 | d | 28.60 | f | 46.75 | d | 56.02 | k | ----- | z | 70.48 | i | 69.57 | b | 59.72 | 45.28 | d | 36.00 | i | 21.13 | d | 43.34 | f | |
1981 | 18.63 | e | 24.04 | d | 36.00 | 48.04 | e | 53.85 | k | 67.93 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.68 | h | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 16.21 | 19.84 | 30.62 | 45.48 | 56.81 | 66.32 | 70.66 | 68.98 | 60.69 | 50.64 | 35.02 | 22.06 | 45.26 | |||||||||||||
S.D. | 5.60 | 4.18 | 4.97 | 3.31 | 3.38 | 2.41 | 1.92 | 2.41 | 2.36 | 3.63 | 3.66 | 4.76 | 1.29 | |||||||||||||
SKEW | -0.47 | 0.13 | 0.62 | -0.05 | 0.46 | -0.91 | -0.06 | 0.34 | -0.37 | 0.54 | -0.79 | -0.31 | -0.23 | |||||||||||||
MAX | 25.89 | 31.27 | 43.18 | 51.70 | 65.04 | 69.50 | 74.66 | 75.45 | 65.07 | 59.68 | 40.88 | 30.31 | 47.53 | |||||||||||||
MIN | 2.82 | 8.83 | 19.45 | 38.72 | 51.19 | 59.37 | 67.47 | 63.68 | 54.45 | 42.73 | 26.10 | 9.29 | 42.28 | |||||||||||||
YRS | 40 | 42 | 41 | 43 | 40 | 39 | 38 | 40 | 41 | 38 | 40 | 42 | 33 |