YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.50 | 42.83 | b | 39.35 | c | 27.57 | h | 44.23 | i | |
1913 | 22.79 | c | 21.25 | b | 31.25 | e | 42.07 | a | 48.24 | 55.90 | 59.74 | 61.22 | a | 52.73 | 40.71 | 35.95 | a | 26.53 | a | 41.53 | ||||||
1914 | 30.48 | 27.98 | a | 36.73 | 42.88 | 51.28 | a | 53.70 | 64.61 | 62.24 | 52.45 | a | 46.93 | b | 38.84 | a | 22.37 | 44.21 | ||||||||
1915 | 24.85 | 34.98 | 40.21 | 45.70 | 47.03 | 53.33 | c | 60.05 | 66.85 | a | 58.53 | 50.26 | b | 35.17 | 33.48 | b | 45.87 | |||||||||
1916 | 22.18 | a | ----- | z | 38.50 | 45.82 | 49.72 | a | 62.62 | e | 61.87 | 64.89 | 58.52 | 47.79 | 35.30 | 26.45 | 46.70 | a | ||||||||
1917 | 26.97 | 34.00 | a | 29.95 | 39.27 | 49.92 | 59.55 | 70.47 | b | 68.97 | b | 62.83 | 54.33 | b | 50.15 | d | 41.65 | 49.00 | ||||||||
1918 | 40.98 | f | ----- | z | 44.58 | a | 50.04 | c | 58.97 | o | 67.18 | 69.30 | a | 65.37 | 63.33 | 53.92 | a | 39.38 | b | 32.77 | 53.99 | c | ||||
1919 | 35.42 | 31.25 | f | 38.13 | a | 47.75 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.35 | g | 32.38 | b | 19.94 | 34.72 | g | |||
1920 | 29.19 | b | 31.65 | b | 34.53 | 39.57 | 45.60 | 53.17 | 63.82 | 62.06 | 53.22 | 42.53 | 34.77 | 28.15 | e | 43.19 | ||||||||||
1921 | 27.69 | 29.43 | 37.32 | 39.65 | 50.19 | 59.83 | a | 63.10 | a | 63.03 | 49.74 | a | 47.73 | 37.29 | b | 25.75 | a | 44.23 | ||||||||
1922 | 18.73 | a | 22.85 | a | 31.12 | a | 38.20 | 47.55 | 61.37 | c | 65.06 | 64.12 | a | 57.59 | a | 47.15 | a | 32.95 | a | 24.39 | 42.59 | |||||
1923 | 29.72 | a | 26.37 | b | 33.65 | 42.90 | 49.85 | 54.46 | b | 65.55 | a | 63.37 | 55.65 | 44.10 | 40.40 | 28.45 | 44.54 | |||||||||
1924 | 24.53 | 35.55 | 33.76 | 41.97 | 54.26 | 57.43 | 65.75 | a | 60.78 | a | 54.75 | 45.00 | b | 34.95 | b | 19.98 | d | 44.06 | ||||||||
1925 | 29.31 | 35.30 | 38.39 | 46.04 | b | 52.29 | b | 58.84 | a | 68.85 | u | 61.42 | 54.31 | a | 45.19 | b | ----- | z | ----- | z | 46.79 | c | ||||
1926 | ----- | z | 35.38 | 38.85 | a | 47.91 | a | 49.27 | 58.22 | 65.20 | a | 60.17 | a | 48.33 | f | 44.52 | g | 39.31 | d | 26.88 | g | 49.29 | d | |||
1927 | 26.25 | i | 27.62 | d | ----- | z | ----- | z | 41.41 | t | ----- | z | ----- | z | 58.32 | f | ----- | z | 46.73 | 38.02 | b | 22.35 | e | 33.68 | h | |
1928 | 26.22 | f | 29.20 | a | 35.43 | p | ----- | z | 48.38 | w | ----- | z | 62.77 | r | 60.35 | h | ----- | z | 44.46 | e | 34.26 | e | 23.74 | h | 35.97 | i |
1929 | 15.50 | i | 18.58 | j | ----- | z | ----- | z | ----- | z | ----- | z | 67.25 | i | 68.22 | k | 53.88 | 50.48 | a | 36.78 | 34.93 | a | 44.02 | h | ||
1930 | 12.96 | f | 34.00 | a | 37.57 | b | 48.36 | a | 48.55 | 55.05 | a | 66.02 | 67.19 | 56.70 | 43.10 | 33.87 | 25.22 | b | 46.88 | a | ||||||
1931 | 28.94 | 31.70 | 36.15 | 43.26 | a | 53.74 | 57.78 | 66.94 | 66.73 | 55.71 | a | 46.77 | 30.60 | 26.65 | 45.41 | |||||||||||
1932 | 23.47 | a | 26.21 | 34.03 | 43.98 | 49.62 | b | 58.98 | 62.63 | 63.60 | 57.93 | 47.60 | 39.63 | 23.28 | a | 44.25 | ||||||||||
1933 | 26.82 | a | 21.16 | 34.50 | 42.02 | 45.92 | 58.65 | 65.84 | 65.29 | b | 53.07 | 51.92 | 40.75 | 35.15 | 45.09 | |||||||||||
1934 | 35.60 | 40.46 | 44.71 | 50.78 | 55.74 | 57.88 | b | 65.75 | a | 67.05 | 54.00 | 46.62 | s | 42.60 | 29.70 | c | 49.48 | a | ||||||||
1935 | 28.67 | a | 33.73 | 34.13 | a | 40.92 | 51.69 | 59.45 | a | 64.47 | b | 62.73 | a | 60.43 | b | 48.29 | c | 32.50 | a | 29.93 | c | 45.58 | ||||
1936 | 27.96 | c | 18.32 | a | 34.07 | c | 46.54 | b | 56.25 | a | 59.07 | 66.03 | 66.02 | a | 56.16 | a | 51.19 | 38.67 | 30.42 | e | 45.89 | |||||
1937 | 10.17 | d | 26.41 | a | 38.88 | c | 41.32 | 52.15 | a | 57.00 | a | 66.78 | a | 62.22 | a | 61.60 | e | 51.44 | d | 40.21 | k | 32.95 | i | 46.80 | b | |
1938 | 29.56 | d | 30.78 | a | 35.67 | a | 43.17 | 50.46 | d | 59.30 | 68.84 | 62.60 | a | 61.95 | a | ----- | z | 31.09 | n | 30.48 | 47.28 | b | ||||
1939 | 30.73 | 25.31 | b | 37.79 | 45.91 | b | 53.20 | a | 54.21 | a | 66.74 | 67.53 | 59.36 | a | 46.93 | a | 42.57 | a | 36.12 | a | 47.20 | |||||
1940 | 29.03 | 33.88 | d | 40.31 | 43.43 | c | 54.96 | e | 61.17 | 66.53 | 65.88 | a | 57.80 | 48.96 | c | 30.93 | 36.32 | t | 48.44 | a | ||||||
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.04 | d | 67.10 | 62.81 | 50.15 | ----- | z | ----- | z | ----- | z | 59.02 | h | |||
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.25 | r | 64.77 | 61.63 | 58.93 | h | 48.02 | 39.92 | k | ----- | z | 58.14 | i | |||
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | 32.06 | a | 33.68 | 39.80 | 50.94 | 54.48 | b | 66.92 | a | 67.21 | 53.00 | b | ----- | z | ----- | z | 28.35 | n | 49.76 | d | ||||
1946 | 28.28 | a | 29.90 | b | 37.35 | d | 44.69 | a | 51.34 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.31 | g |
1947 | ----- | z | 32.59 | 39.66 | 43.38 | 53.68 | 54.48 | a | 63.13 | 61.05 | 55.50 | e | 47.35 | 33.60 | 30.66 | c | 46.83 | a | ||||||||
1948 | 26.40 | 27.52 | 31.23 | a | 40.19 | a | 47.62 | a | 58.27 | 58.65 | 59.45 | 53.88 | 45.82 | 32.57 | 21.21 | 41.90 | ||||||||||
1949 | 9.25 | a | 24.86 | 35.15 | 45.78 | 52.68 | 55.88 | 61.44 | 61.55 | 55.73 | 40.77 | 42.83 | a | 26.97 | 42.74 | |||||||||||
1950 | 10.02 | a | 29.31 | b | 32.11 | 38.59 | a | 45.81 | 53.32 | 61.58 | 62.30 | a | 54.82 | 45.89 | 34.80 | 35.14 | f | 42.59 | a | |||||||
1951 | ----- | z | 27.70 | ----- | z | ----- | z | ----- | z | 52.57 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.13 | j | ||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.43 | w | 63.50 | c | 63.15 | 58.85 | d | 53.25 | e | 31.57 | c | 30.64 | b | 50.16 | f | |
1953 | 36.12 | g | 29.62 | h | 36.95 | a | 44.21 | f | 46.48 | 51.43 | 62.93 | b | 62.24 | d | 60.04 | f | 49.24 | 39.30 | b | 32.08 | 47.58 | d | ||||
1954 | 28.24 | 37.04 | 33.36 | f | 42.80 | c | 50.18 | 51.41 | a | 62.46 | d | 58.44 | f | 57.68 | s | 42.59 | i | 40.88 | 29.79 | b | 42.85 | d | ||||
1955 | 26.81 | 26.04 | 27.52 | c | 37.12 | d | 45.86 | c | 57.34 | a | 60.82 | 62.44 | m | 54.61 | b | 46.78 | b | 28.47 | a | 26.81 | b | 39.83 | a | |||
1956 | 28.00 | g | 22.44 | m | 33.06 | d | 45.20 | 51.52 | c | 54.80 | 64.77 | a | 59.53 | n | 56.02 | a | 43.32 | 32.82 | 31.69 | b | 45.91 | c | ||||
1957 | 15.35 | 28.40 | b | 36.94 | 43.38 | b | 51.98 | 56.14 | a | 61.32 | a | 59.41 | b | 59.40 | d | 43.97 | a | 33.12 | a | 31.42 | g | 44.49 | a | |||
1958 | 30.24 | 37.28 | a | 33.90 | 41.12 | 55.20 | c | 58.12 | 64.29 | 67.55 | a | 53.78 | a | 48.48 | a | 33.50 | b | 34.17 | b | 46.47 | ||||||
1959 | 29.34 | b | 28.46 | c | 36.67 | h | ----- | z | 46.31 | g | 55.48 | c | 65.54 | e | ----- | z | ----- | z | ----- | z | 33.37 | 29.39 | 40.26 | f | ||
1960 | 21.53 | 27.81 | 37.39 | 43.55 | 48.10 | 58.23 | 69.15 | a | 59.68 | 55.61 | c | 44.98 | 34.35 | 28.55 | 44.08 | |||||||||||
1961 | 30.87 | 35.26 | a | 35.00 | 41.48 | 48.13 | a | 61.75 | 66.13 | 68.58 | 50.37 | 43.63 | 31.90 | 25.95 | 44.92 | |||||||||||
1962 | 22.87 | a | 28.88 | 32.56 | 45.15 | 45.97 | 55.20 | 62.03 | 61.55 | a | 57.32 | 46.45 | 36.85 | 32.66 | 43.96 | |||||||||||
1963 | 20.76 | 38.57 | 36.87 | a | 41.60 | 51.47 | 56.85 | 60.63 | 63.76 | 61.22 | a | 49.68 | a | 37.15 | 28.42 | 45.58 | ||||||||||
1964 | 27.52 | 30.93 | 34.21 | 40.12 | 49.06 | 56.00 | 64.40 | 60.23 | a | 53.20 | 49.56 | 34.90 | 26.34 | 43.87 | ||||||||||||
1965 | 29.16 | 32.02 | b | 33.24 | 43.97 | ----- | z | ----- | z | 63.82 | q | 63.85 | 50.00 | 52.45 | 39.83 | a | 28.25 | a | 41.42 | c | ||||||
1966 | 28.82 | 30.55 | 35.10 | 42.52 | 51.70 | a | 54.08 | 62.19 | 64.02 | 59.27 | 44.90 | a | 36.14 | a | 31.33 | a | 45.05 | |||||||||
1967 | 30.82 | 33.80 | a | 33.50 | 37.85 | 48.18 | a | 57.73 | 65.25 | a | 68.77 | 62.17 | ----- | z | 38.17 | 26.00 | 45.66 | a | ||||||||
1968 | 26.71 | 34.43 | 40.63 | 39.97 | 48.34 | 56.62 | 65.89 | 60.92 | 55.38 | 44.90 | 34.60 | a | 24.53 | 44.41 | ||||||||||||
1969 | 21.48 | 27.29 | 34.94 | 43.57 | 52.40 | 59.55 | 62.60 | a | 63.93 | d | 57.38 | 41.90 | 38.34 | a | 31.56 | 44.58 | ||||||||||
1970 | 28.16 | 36.29 | 34.60 | 37.77 | 50.08 | 61.47 | 67.23 | 65.85 | 51.23 | 44.77 | 35.73 | 26.50 | 44.97 | |||||||||||||
1971 | 30.05 | 32.96 | 31.94 | 41.22 | 51.69 | 52.60 | a | 64.85 | a | 69.44 | 50.62 | 42.08 | 34.85 | 26.42 | 44.06 | |||||||||||
1972 | 22.56 | 30.12 | 39.24 | 39.53 | 51.02 | a | 57.82 | 63.63 | 66.37 | 51.65 | 45.15 | 35.95 | 22.13 | 43.76 | ||||||||||||
1973 | 24.98 | 34.41 | 37.69 | 42.00 | 52.21 | 58.20 | 66.13 | 65.47 | 56.05 | 46.27 | 32.33 | 32.74 | 45.71 | |||||||||||||
1974 | 22.50 | 32.89 | 35.32 | 42.50 | 47.35 | 61.13 | 63.82 | 64.55 | 58.52 | 49.02 | 37.47 | 31.26 | 45.53 | |||||||||||||
1975 | 26.94 | 27.59 | 32.97 | 36.50 | 47.56 | 54.72 | 68.05 | 62.40 | 56.24 | a | 44.55 | 34.08 | 32.81 | 43.70 | ||||||||||||
1976 | 30.55 | 30.40 | 31.77 | 41.58 | 50.81 | 53.27 | 64.67 | a | 60.71 | 59.62 | 46.84 | 39.07 | 32.02 | 45.11 | ||||||||||||
1977 | 24.26 | 36.64 | 34.47 | 46.42 | 46.60 | 61.68 | 62.87 | 67.58 | 52.75 | 45.61 | 33.45 | 30.02 | 45.20 | |||||||||||||
1978 | 31.40 | 35.12 | 41.65 | 42.13 | 47.16 | 57.67 | 63.44 | 61.50 | 54.12 | 46.66 | 29.10 | 22.53 | 44.37 | |||||||||||||
1979 | 15.87 | 28.73 | 37.35 | 41.65 | 51.05 | 57.47 | 65.02 | 64.71 | 59.00 | 48.50 | 32.78 | 33.81 | 44.66 | |||||||||||||
1980 | 22.42 | 33.33 | 34.85 | 46.95 | 48.61 | 53.35 | 62.68 | 58.65 | 56.82 | 47.61 | 36.85 | 32.90 | b | 44.58 | ||||||||||||
1981 | 34.85 | a | 31.95 | 38.79 | 43.27 | 48.39 | 53.50 | 61.66 | 66.55 | 56.92 | 43.87 | 39.57 | ----- | z | 47.21 | a | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.88 | 30.77 | 35.80 | 42.81 | 50.12 | 57.00 | 64.45 | 63.84 | 55.93 | 46.82 | 36.13 | 28.78 | 44.64 | |||||||||||||
S.D. | 5.83 | 4.52 | 3.35 | 3.15 | 2.72 | 3.12 | 2.49 | 2.78 | 3.48 | 3.19 | 3.82 | 4.44 | 1.38 | |||||||||||||
SKEW | -1.15 | -0.39 | 0.35 | 0.31 | 0.24 | 0.51 | 0.03 | 0.20 | 0.16 | 0.36 | 0.77 | 0.10 | 0.44 | |||||||||||||
MAX | 35.60 | 40.46 | 44.71 | 50.78 | 56.25 | 67.18 | 70.47 | 69.44 | 63.33 | 54.33 | 50.15 | 41.65 | 49.00 | |||||||||||||
MIN | 9.25 | 18.32 | 27.52 | 36.50 | 45.60 | 51.41 | 58.65 | 58.65 | 49.74 | 40.71 | 28.47 | 19.94 | 41.53 | |||||||||||||
YRS | 53 | 58 | 58 | 58 | 56 | 59 | 59 | 57 | 58 | 57 | 60 | 54 | 37 |