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 | 40.00 | v | ----- | z |
1923 | 34.18 | 28.18 | 41.77 | 47.10 | 53.67 | a | 58.05 | 69.26 | 69.63 | 62.55 | 48.85 | 42.88 | 34.03 | 49.18 | ||||||||||||
1924 | 28.32 | a | 41.64 | 39.23 | a | 47.75 | 60.92 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.57 | g | ||
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.38 | g | 58.93 | 49.89 | 39.48 | c | 35.92 | 46.06 | h | |||
1926 | 31.57 | a | 39.73 | 45.37 | 51.95 | a | 53.39 | 65.18 | 70.53 | 66.58 | 53.55 | 50.18 | a | 40.24 | a | 31.23 | 49.96 | |||||||||
1927 | 26.00 | 35.98 | a | 37.70 | a | 44.05 | 49.02 | a | 61.60 | 68.63 | 67.85 | 55.31 | a | 49.83 | a | 42.36 | a | 27.55 | a | 47.16 | ||||||
1928 | 28.66 | 33.60 | 41.48 | a | 43.05 | b | 57.55 | a | 58.50 | 69.10 | a | 66.85 | 60.00 | a | 49.21 | b | 39.22 | 29.23 | 48.04 | |||||||
1929 | 22.66 | 21.11 | 39.71 | b | 42.53 | a | 54.39 | i | 61.24 | a | 66.70 | a | 71.48 | 57.88 | 53.45 | 40.29 | b | 37.50 | 46.78 | a | ||||||
1930 | 12.36 | b | 40.37 | a | 41.74 | b | 51.13 | 51.57 | a | 59.60 | 69.11 | 69.10 | 60.05 | a | 45.73 | a | 38.02 | d | 30.31 | b | 47.42 | |||||
1931 | 36.07 | c | 34.54 | b | 40.58 | 48.52 | d | 59.21 | b | 59.24 | c | 70.71 | 68.71 | 57.58 | 49.17 | a | 36.23 | d | 28.70 | a | 49.10 | |||||
1932 | 32.27 | e | 31.69 | 39.95 | b | 46.19 | a | 53.25 | e | 62.60 | a | 64.13 | 65.13 | a | 62.32 | 51.95 | 43.25 | d | 26.95 | a | 48.31 | |||||
1933 | 31.02 | b | 30.23 | b | 39.71 | 45.53 | 48.09 | b | 61.82 | b | 70.21 | 69.55 | a | 54.67 | 53.97 | 41.78 | a | 39.21 | c | 48.82 | ||||||
1934 | 39.37 | a | 40.33 | b | 48.77 | 55.05 | a | 57.64 | b | 62.77 | 67.16 | 69.02 | 59.16 | a | 50.92 | a | 41.79 | d | 33.61 | c | 52.13 | |||||
1935 | 31.95 | a | 35.07 | a | 37.37 | a | 43.21 | a | 53.95 | a | 62.33 | c | 67.29 | 66.52 | a | 64.53 | 51.79 | c | 36.17 | a | 28.95 | 48.26 | ||||
1936 | 33.62 | a | 20.70 | d | 39.67 | b | 49.57 | a | 57.20 | a | 62.45 | 67.92 | 68.71 | 60.10 | 54.65 | a | 38.36 | a | 35.35 | a | 49.02 | |||||
1937 | 15.46 | g | 32.02 | b | 41.70 | a | 43.31 | d | 54.16 | b | 61.40 | a | 68.81 | 65.00 | a | 61.55 | 53.53 | b | 40.40 | e | 35.41 | c | 50.66 | a | ||
1938 | 32.52 | e | 31.39 | 39.18 | a | 46.10 | a | 53.75 | c | 62.29 | a | 70.18 | a | 63.18 | 61.67 | a | 48.88 | b | 34.16 | a | 33.06 | 48.03 | ||||
1939 | 35.37 | a | 30.54 | a | 41.18 | 46.38 | a | 55.66 | 57.07 | a | 69.06 | 69.60 | 61.38 | a | 49.43 | b | 43.22 | a | 38.38 | c | 49.77 | |||||
1940 | 29.19 | d | 37.54 | a | 44.66 | 46.62 | 56.98 | a | 65.24 | a | 67.83 | a | 68.53 | 60.63 | 51.97 | 35.27 | 34.52 | a | 49.91 | |||||||
1941 | 31.66 | 37.57 | a | 44.79 | 49.42 | 52.76 | 59.60 | 71.71 | 66.55 | 55.35 | 48.02 | c | 42.47 | 34.61 | 49.54 | |||||||||||
1942 | 21.05 | 33.07 | 38.48 | 47.33 | 50.58 | 56.57 | 70.10 | 69.48 | 62.50 | 52.77 | 37.10 | 35.71 | 47.90 | |||||||||||||
1943 | 23.40 | 33.52 | 37.44 | 48.12 | 48.76 | 55.22 | 67.94 | 63.95 | 64.13 | 51.08 | 37.65 | 29.84 | 46.75 | |||||||||||||
1944 | 29.69 | 32.30 | a | 39.33 | b | 44.92 | 52.95 | 58.50 | a | 67.06 | 64.58 | 62.42 | 54.91 | b | 35.93 | 27.60 | a | 47.52 | ||||||||
1945 | 33.44 | 35.29 | 37.58 | a | 43.68 | 54.05 | 58.47 | a | 69.16 | 68.92 | 58.17 | a | 52.97 | 38.31 | c | 31.76 | d | 48.48 | ||||||||
1946 | 35.23 | 37.17 | a | 39.63 | a | 46.88 | a | 55.34 | 58.52 | a | 67.77 | a | 68.13 | a | 58.29 | a | 45.62 | c | 36.17 | c | 35.50 | b | 48.69 | |||
1947 | 30.50 | c | 39.04 | b | 45.18 | 49.68 | 59.58 | 57.87 | c | 64.89 | 64.32 | 61.38 | b | 48.60 | 38.24 | a | 36.23 | a | 49.63 | |||||||
1948 | 32.31 | b | 30.50 | c | 36.55 | a | 41.93 | 51.16 | 62.05 | 63.15 | a | 63.06 | 57.17 | 47.40 | 38.18 | 27.69 | 45.93 | |||||||||
1949 | 17.29 | 30.57 | 39.31 | 48.84 | h | 57.58 | 60.77 | d | 65.81 | 65.29 | 59.15 | g | 44.58 | g | 43.78 | 32.08 | e | 45.83 | c | |||||||
1950 | 16.71 | s | 29.69 | a | 37.13 | 43.18 | 51.35 | 59.35 | 67.87 | 68.74 | 62.45 | 48.04 | e | 38.91 | c | 37.18 | 49.44 | a | ||||||||
1951 | 27.72 | f | 33.84 | 34.68 | f | 48.15 | 51.97 | 62.62 | e | 69.06 | 66.23 | 61.88 | m | 47.89 | 36.93 | 29.35 | 49.56 | c | ||||||||
1952 | 26.50 | 36.07 | 37.55 | 48.00 | 53.97 | 58.65 | c | 69.23 | 67.55 | 64.52 | 56.32 | 33.25 | 30.89 | 48.54 | ||||||||||||
1953 | 40.61 | 37.88 | c | 39.89 | 43.52 | 49.29 | 53.38 | 67.93 | c | 65.61 | 62.33 | 56.18 | a | 42.38 | a | 36.85 | 49.66 | |||||||||
1954 | 30.58 | 36.43 | 35.94 | 45.42 | 53.89 | 56.79 | d | 64.73 | c | 61.71 | b | 57.93 | 46.02 | d | 43.41 | a | 31.21 | 47.00 | ||||||||
1955 | 31.48 | 32.86 | 34.15 | a | 39.75 | 49.17 | a | 60.23 | 63.10 | 67.30 | a | 60.50 | 50.06 | 33.27 | 30.71 | 46.05 | ||||||||||
1956 | 31.52 | 27.78 | 39.15 | d | 48.48 | b | 55.45 | b | 57.67 | c | 70.29 | 66.42 | 61.82 | 47.18 | 35.67 | 34.65 | 48.00 | |||||||||
1957 | 17.08 | 32.86 | 39.10 | 46.37 | 55.90 | 62.15 | 65.29 | 63.37 | 62.72 | 45.65 | 38.93 | a | 38.50 | 47.33 | ||||||||||||
1958 | 33.97 | 41.86 | 38.21 | 44.50 | 59.74 | 63.33 | 71.97 | a | 72.88 | a | 58.93 | 52.77 | 38.03 | a | 36.50 | 51.06 | ||||||||||
1959 | 33.31 | 32.88 | 40.40 | 46.48 | 48.77 | 59.80 | 69.68 | a | 65.05 | 56.68 | 50.73 | 40.25 | d | 32.21 | 48.02 | |||||||||||
1960 | 24.97 | 34.12 | 41.73 | ----- | z | ----- | z | 61.17 | 72.84 | 64.25 | a | 61.38 | 52.58 | 38.93 | 30.18 | 48.21 | b | |||||||||
1961 | 33.84 | 40.41 | 40.87 | 45.68 | b | 51.52 | 66.32 | 70.61 | 73.48 | b | 56.29 | a | 47.61 | 34.87 | 33.58 | 49.59 | ||||||||||
1962 | 30.19 | 35.04 | 37.65 | 49.60 | 47.66 | 59.52 | 66.95 | 64.90 | a | 62.03 | 49.81 | 40.82 | 36.05 | 48.35 | ||||||||||||
1963 | 26.85 | 41.70 | 41.05 | 42.03 | 51.09 | c | 57.30 | c | 62.11 | 67.43 | b | 60.97 | a | 47.68 | l | 39.88 | a | 31.35 | 47.43 | a | ||||||
1964 | 33.97 | 37.38 | a | 37.53 | a | 42.97 | 49.95 | 57.78 | 66.92 | 62.74 | 56.80 | 49.21 | e | 34.34 | a | 30.71 | b | 46.69 | ||||||||
1965 | 31.94 | 38.34 | 36.12 | c | 42.29 | f | 49.27 | t | 58.40 | 68.50 | 66.50 | 55.68 | 55.11 | 41.30 | 33.31 | 48.52 | b | |||||||||
1966 | 33.18 | a | 34.86 | 40.13 | 47.05 | 55.15 | 57.83 | 64.34 | 66.81 | 61.17 | 50.50 | 40.37 | 36.18 | a | 48.96 | |||||||||||
1967 | 37.10 | 38.91 | 38.37 | 40.35 | 53.26 | 63.13 | 70.64 | c | 73.52 | 65.40 | a | 50.55 | a | 40.17 | d | 31.44 | e | 50.24 | ||||||||
1968 | 33.48 | a | 38.71 | 43.65 | 43.75 | 52.71 | 60.88 | 70.02 | a | 63.98 | a | 59.65 | 47.32 | 38.53 | 30.20 | a | 48.57 | |||||||||
1969 | 20.65 | 29.43 | 40.23 | 44.82 | 56.81 | 64.10 | 66.65 | 64.56 | 59.83 | 45.66 | 41.21 | a | 31.34 | 47.11 | ||||||||||||
1970 | 30.84 | 36.39 | 38.92 | 40.40 | 52.39 | 64.92 | 69.11 | 68.42 | 53.68 | 45.98 | a | 38.02 | 32.42 | 47.62 | ||||||||||||
1971 | 36.05 | 37.25 | 36.81 | 43.42 | 53.47 | 55.40 | 69.32 | 70.08 | 53.97 | 47.20 | c | 39.19 | c | 32.88 | a | 47.92 | ||||||||||
1972 | 30.35 | 34.67 | 42.41 | b | 41.53 | 54.31 | 60.70 | 68.53 | a | 69.79 | 55.44 | d | 47.47 | 38.88 | 26.05 | c | 47.51 | |||||||||
1973 | 27.48 | 34.68 | 39.82 | a | 45.70 | 54.52 | 59.75 | l | 68.90 | 65.06 | 58.85 | 48.48 | b | 35.62 | 36.13 | a | 46.84 | a | ||||||||
1974 | 24.52 | 37.11 | 39.22 | a | 43.32 | 48.00 | b | 61.20 | o | 65.75 | g | 67.54 | h | 62.82 | e | 50.34 | 39.35 | 33.82 | 42.05 | c | ||||||
1975 | 31.60 | b | 28.90 | c | 35.18 | a | 37.83 | d | 49.95 | b | 56.17 | 70.32 | a | 63.38 | b | 61.43 | 47.91 | c | 37.30 | 35.70 | a | 46.31 | ||||
1976 | 35.02 | b | 33.93 | 37.02 | h | 42.50 | c | 51.45 | 52.09 | n | 66.57 | h | 62.61 | 61.98 | d | 51.10 | 41.16 | a | 34.25 | a | 46.00 | c | ||||
1977 | 27.79 | b | 35.71 | 38.61 | 49.66 | a | 48.41 | b | 60.97 | o | 65.74 | b | 71.97 | 54.82 | 48.33 | a | 35.02 | c | 32.44 | 46.23 | a | |||||
1978 | 30.70 | a | 35.81 | b | 43.53 | 43.72 | 48.74 | b | 60.13 | c | 70.43 | q | 66.05 | a | 56.12 | 49.72 | a | 31.92 | d | 26.77 | 44.84 | a | ||||
1979 | 15.18 | 32.80 | c | 42.39 | 44.95 | 54.00 | 60.38 | d | 67.89 | d | 68.10 | j | 62.82 | 53.00 | a | 32.85 | d | 35.35 | a | 45.60 | a | |||||
1980 | 24.53 | 32.91 | b | 38.61 | 46.76 | a | 51.28 | a | 54.21 | d | 66.23 | c | 63.75 | g | 59.68 | b | 49.31 | 38.72 | 35.76 | j | 46.22 | b | ||||
1981 | 31.62 | b | 33.79 | 41.50 | d | 44.63 | 51.48 | 59.27 | o | 65.58 | 71.10 | 60.63 | 47.35 | a | 40.13 | g | 33.00 | b | 48.07 | b | ||||||
1982 | 30.26 | 31.58 | c | 39.10 | a | 41.90 | 50.87 | a | 56.38 | m | 65.50 | 68.21 | 58.73 | b | 48.40 | 35.20 | 31.96 | e | 45.61 | a | ||||||
1983 | 36.95 | a | 39.35 | d | 44.50 | d | 45.66 | b | 56.24 | 57.17 | l | 63.16 | b | 69.18 | 56.70 | 51.27 | 41.95 | 22.87 | a | 47.98 | a | |||||
1984 | 34.19 | 37.74 | f | 43.64 | f | 43.09 | a | 48.96 | d | 56.48 | b | 68.85 | e | 67.97 | 58.47 | m | 46.52 | c | 37.32 | e | 26.93 | i | 50.42 | d | ||
1985 | 24.89 | d | 32.50 | j | 39.67 | b | 50.17 | c | 53.91 | b | 61.96 | e | 73.60 | 65.50 | 54.55 | 47.23 | a | 28.23 | d | 16.81 | m | 49.97 | b | |||
1986 | 35.05 | i | 35.61 | f | 46.10 | b | 44.38 | d | 52.48 | c | 67.70 | c | 63.72 | b | 72.64 | b | 55.32 | 52.13 | a | 39.72 | a | 29.81 | d | 52.40 | b | |
1987 | 29.98 | c | 37.08 | d | 41.34 | 51.29 | b | 56.81 | b | 63.95 | a | 64.78 | a | 67.52 | 64.30 | 55.30 | a | 40.41 | a | 29.02 | 50.15 | |||||
1988 | 29.17 | a | 38.29 | 41.13 | 48.34 | b | 50.62 | c | 58.68 | 68.68 | a | 66.95 | a | 61.02 | c | 57.96 | c | 40.03 | 33.02 | 49.49 | ||||||
1989 | 35.03 | a | 23.67 | b | 38.55 | 49.60 | a | 52.11 | 62.84 | b | 66.48 | f | 64.93 | a | 61.90 | 50.39 | 43.93 | 33.52 | a | 46.95 | a | |||||
1990 | 35.72 | a | 34.98 | f | 43.11 | 51.67 | 51.56 | 60.67 | 71.63 | a | 69.67 | a | 66.07 | a | 49.47 | b | 42.89 | c | 24.22 | a | 51.52 | a | ||||
1991 | 32.00 | 43.19 | a | 38.83 | a | 45.42 | 49.98 | a | 56.18 | b | 69.12 | a | 71.38 | b | 64.97 | 52.18 | 39.02 | a | 34.06 | 49.69 | ||||||
1992 | 36.50 | 41.12 | a | 45.98 | 49.75 | 58.75 | a | 66.92 | 67.67 | a | 71.06 | 59.54 | b | 53.23 | a | 38.60 | a | 28.57 | c | 51.48 | ||||||
1993 | 23.02 | 26.31 | a | 40.13 | a | 45.52 | a | 57.92 | 57.93 | 59.98 | 65.31 | 62.11 | b | 54.57 | b | 33.12 | a | 32.03 | 46.50 | |||||||
1994 | 39.55 | c | 32.24 | a | 44.80 | a | 49.17 | a | 55.63 | 59.72 | 71.38 | b | 67.81 | b | 65.25 | 48.68 | 34.93 | 33.27 | a | 50.20 | ||||||
1995 | 29.06 | e | 39.73 | 40.60 | 45.14 | a | 54.68 | 58.70 | 67.32 | 64.71 | 63.52 | 48.42 | a | 43.80 | 31.13 | 48.90 | ||||||||||
1996 | 33.82 | a | 30.50 | 40.61 | 47.20 | 49.06 | 59.23 | 71.92 | a | 69.11 | 59.03 | 49.40 | a | 37.94 | f | 33.22 | a | 49.37 | a | |||||||
1997 | 33.12 | b | 35.84 | 42.07 | a | 45.54 | b | 57.44 | 58.78 | 67.08 | 70.38 | b | 61.65 | 49.94 | 40.50 | 33.86 | b | 49.68 | ||||||||
1998 | 34.63 | a | 38.68 | 42.42 | 46.13 | 52.02 | 60.33 | a | 73.48 | a | 70.90 | 66.52 | 49.42 | 41.72 | 33.00 | 50.77 | ||||||||||
1999 | 38.68 | a | 38.14 | 40.69 | 43.70 | c | 50.55 | c | 59.47 | 66.78 | a | 69.74 | 61.07 | 51.10 | 44.68 | 35.48 | a | 50.01 | ||||||||
2000 | 30.68 | a | 35.67 | 41.47 | 50.55 | 54.29 | 61.85 | 67.15 | 67.66 | 59.65 | 49.19 | 32.60 | a | 30.32 | 48.42 | |||||||||||
2001 | 31.85 | 33.44 | a | 43.02 | 44.36 | b | 57.60 | 58.73 | 68.03 | 70.98 | 64.30 | 50.13 | 41.53 | a | 32.73 | a | 49.73 | |||||||||
2002 | 33.97 | a | 37.62 | 37.71 | 46.88 | 52.68 | 62.93 | 70.85 | 65.83 | a | 61.55 | 47.71 | 39.58 | 34.15 | 49.29 | |||||||||||
2003 | 36.55 | b | 36.25 | 44.66 | 44.62 | 52.79 | 63.43 | 72.19 | 69.66 | 63.62 | 54.50 | 35.20 | 32.83 | b | 50.53 | |||||||||||
2004 | 27.74 | b | 35.44 | c | 45.40 | 48.79 | b | ----- | z | 61.65 | 70.37 | a | 70.92 | a | 58.82 | 51.43 | b | ----- | z | ----- | z | 52.28 | c | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.57 | 34.71 | 40.46 | 45.94 | 53.26 | 60.27 | 68.13 | 67.52 | 60.14 | 50.24 | 38.66 | 32.48 | 48.71 | |||||||||||||
S.D. | 5.54 | 4.49 | 2.82 | 3.16 | 3.20 | 2.94 | 2.71 | 2.81 | 3.20 | 2.81 | 3.32 | 3.30 | 1.40 | |||||||||||||
SKEW | -1.05 | -0.79 | 0.47 | 0.17 | 0.28 | 0.18 | -0.45 | 0.09 | -0.25 | 0.50 | -0.51 | -0.44 | 0.05 | |||||||||||||
MAX | 40.61 | 43.19 | 48.77 | 55.05 | 60.92 | 67.70 | 73.60 | 73.52 | 66.52 | 57.96 | 44.68 | 39.21 | 52.13 | |||||||||||||
MIN | 12.36 | 20.70 | 34.15 | 37.83 | 47.66 | 53.38 | 59.98 | 61.71 | 53.55 | 45.63 | 28.23 | 22.87 | 45.93 | |||||||||||||
YRS | 77 | 77 | 78 | 78 | 77 | 73 | 76 | 77 | 78 | 79 | 78 | 77 | 55 |