YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1916 | ----- | z | ----- | z | ----- | z | 39.40 | y | 39.65 | 44.93 | c | 49.42 | 48.52 | 44.90 | 34.84 | 31.55 | a | 32.84 | 40.83 | d | ||||||
1917 | 29.93 | a | 32.59 | a | 32.26 | 38.37 | 42.30 | a | 42.93 | a | 46.35 | 48.35 | 48.77 | 43.71 | 39.93 | a | 40.42 | 40.49 | ||||||||
1918 | 37.30 | a | 31.86 | 34.63 | a | 34.53 | 39.13 | 45.00 | 50.16 | 50.42 | 45.60 | 44.77 | 37.17 | 34.00 | 40.38 | |||||||||||
1919 | 34.17 | a | 33.86 | 35.45 | 39.50 | 39.29 | 41.57 | 46.10 | 48.10 | a | 43.97 | 38.94 | 36.60 | 30.90 | j | 39.78 | a | |||||||||
1920 | 32.90 | 29.79 | 33.87 | 35.31 | a | 35.37 | a | 42.87 | 49.42 | 49.03 | 46.40 | 41.87 | 34.96 | b | 36.39 | 39.02 | ||||||||||
1921 | 33.77 | a | 36.46 | 35.55 | 35.23 | 40.10 | 47.87 | 48.07 | a | 49.19 | 43.33 | 41.73 | a | 38.70 | 31.52 | 40.13 | ||||||||||
1922 | 28.32 | 29.63 | a | 31.81 | 35.63 | 40.13 | 47.30 | 47.29 | 44.87 | a | 47.77 | 42.90 | 32.90 | 27.97 | 38.04 | |||||||||||
1923 | 33.97 | 26.96 | 32.94 | 37.90 | 43.03 | a | 45.43 | 49.58 | 50.48 | 46.03 | a | 40.23 | 35.93 | 33.93 | a | 39.70 | ||||||||||
1924 | 31.68 | 37.75 | a | 32.87 | 34.87 | 41.43 | a | 44.79 | a | 47.97 | 44.71 | 42.68 | b | 41.57 | a | 35.00 | 26.23 | 38.46 | ||||||||
1925 | 35.50 | a | 37.04 | 35.10 | a | 40.03 | 43.10 | 44.18 | h | 49.77 | 47.18 | c | 39.87 | 39.21 | b | 35.73 | 37.80 | a | 40.03 | a | ||||||
1926 | 34.87 | a | 38.33 | a | 36.90 | 39.43 | 42.77 | a | 45.57 | 48.23 | 50.55 | 41.87 | 44.33 | a | 39.96 | c | 33.00 | 41.32 | ||||||||
1927 | 32.48 | 32.11 | 32.70 | a | 35.10 | 39.83 | b | 48.43 | 50.00 | 53.39 | 50.53 | 40.59 | b | 38.73 | 29.00 | a | 40.24 | |||||||||
1928 | 34.13 | 31.39 | a | 37.61 | 37.87 | ----- | z | 59.70 | ----- | z | ----- | z | 46.31 | a | 43.00 | a | 37.20 | 29.97 | a | 39.69 | c | |||||
1929 | 28.07 | b | 23.57 | 34.93 | b | 34.70 | 39.43 | a | 43.14 | w | 45.35 | h | 48.06 | 42.03 | 40.61 | 31.57 | 35.26 | 35.82 | b | |||||||
1930 | 19.20 | a | 33.85 | b | 32.06 | 40.03 | 39.48 | 43.97 | 46.10 | 48.16 | 46.27 | 38.32 | f | 37.00 | 32.97 | 38.10 | a | |||||||||
1931 | 39.52 | d | 33.75 | 36.90 | a | 37.69 | a | 43.14 | c | 47.41 | a | 48.48 | b | 48.22 | d | 48.05 | j | 40.92 | s | 37.67 | r | 31.64 | q | 41.89 | d | |
1932 | 32.80 | k | 30.58 | q | 36.67 | p | 40.60 | e | 38.86 | j | 44.76 | i | 46.50 | o | 50.20 | u | 44.48 | a | ----- | z | ----- | z | ----- | z | 42.54 | j |
1933 | ----- | z | 29.68 | 35.74 | 36.23 | 42.19 | 44.77 | 47.97 | 51.03 | 46.03 | 41.65 | 39.83 | 37.97 | a | 41.19 | a | ||||||||||
1934 | 38.39 | 36.25 | 38.39 | 42.40 | 45.28 | b | 45.47 | 50.00 | a | 53.03 | b | 46.29 | b | 42.45 | 41.30 | c | 35.68 | 42.91 | ||||||||
1935 | 32.53 | a | 33.96 | 33.45 | 35.34 | a | 40.77 | 46.27 | 48.48 | 49.06 | 47.40 | 39.17 | a | 30.37 | ----- | z | 39.71 | a | ||||||||
1936 | ----- | z | 19.17 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.39 | 31.83 | 39.57 | x | 37.61 | j | ||
1937 | 22.57 | c | 33.26 | a | 38.45 | 39.00 | a | 42.43 | a | 48.47 | 49.71 | 48.94 | 48.40 | 44.94 | 41.67 | 36.79 | b | 41.22 | ||||||||
1938 | 34.30 | d | 34.96 | b | 35.23 | 39.33 | 41.23 | 47.00 | b | 50.47 | a | 48.90 | 49.80 | j | 41.46 | c | 34.29 | b | 34.97 | 40.19 | a | |||||
1939 | 37.62 | e | 32.52 | a | 37.33 | d | 39.03 | 41.60 | a | 47.93 | 49.90 | a | 50.68 | 47.10 | a | 43.72 | b | 37.89 | b | 38.73 | a | 42.01 | ||||
1940 | 35.61 | 37.79 | 39.10 | 41.07 | 44.03 | a | 46.47 | 52.03 | 51.33 | a | 50.26 | c | 46.55 | b | 34.27 | 35.84 | 42.86 | |||||||||
1941 | 34.38 | b | 34.12 | b | 36.81 | 39.17 | 43.47 | a | 48.40 | 54.13 | 53.39 | 49.21 | a | 44.97 | 39.97 | 36.00 | 42.83 | |||||||||
1942 | 30.61 | 33.12 | d | ----- | z | ----- | z | 41.76 | f | 46.57 | 53.19 | 53.10 | a | 46.28 | a | 41.81 | 35.54 | b | 36.90 | 41.90 | c | |||||
1943 | 26.00 | b | 32.75 | 31.42 | 39.47 | 39.94 | 46.47 | 50.13 | 49.32 | 46.97 | 42.27 | a | 36.00 | d | 31.10 | a | 39.32 | |||||||||
1944 | 31.87 | 32.03 | 31.90 | 37.40 | 39.39 | 45.87 | 50.17 | a | 50.23 | 50.33 | c | 44.06 | 36.97 | 29.35 | 39.96 | |||||||||||
1945 | 33.84 | 34.17 | e | 32.26 | 36.38 | a | 43.48 | 43.52 | a | 48.46 | c | 47.97 | b | 42.40 | e | 39.78 | d | 35.12 | d | ----- | z | 39.76 | a | |||
1946 | 33.48 | f | 34.93 | 35.55 | 38.27 | 42.97 | a | 46.70 | 49.55 | 49.90 | 46.63 | 39.71 | c | 32.46 | b | 33.85 | k | 41.67 | b | |||||||
1947 | ----- | z | 36.00 | f | 37.27 | e | ----- | z | 43.57 | a | 46.67 | c | 48.50 | e | 49.41 | i | 45.80 | 44.39 | 37.34 | a | 35.50 | c | 42.38 | d | ||
1948 | 32.50 | c | 30.90 | ----- | z | ----- | z | ----- | z | 50.21 | b | 48.52 | d | 51.80 | a | 45.90 | a | 39.83 | b | 35.37 | 31.46 | c | 40.72 | c | ||
1949 | 21.39 | 29.82 | 36.19 | 40.00 | 43.94 | 44.07 | 48.27 | a | 49.40 | a | 46.77 | 36.41 | b | 41.69 | a | 31.60 | f | 39.81 | a | |||||||
1950 | 19.55 | 31.93 | 35.97 | 35.80 | 39.90 | a | 46.77 | 48.03 | 51.19 | 44.87 | 41.70 | a | 37.40 | 40.71 | 39.48 | |||||||||||
1951 | 32.26 | 33.79 | 31.58 | 34.70 | 41.90 | a | 47.77 | 51.03 | 49.94 | 46.93 | a | 42.77 | 37.43 | 31.29 | 40.12 | |||||||||||
1952 | 30.68 | 33.72 | 35.06 | 35.83 | 40.84 | 46.87 | 48.94 | 50.68 | 44.90 | 40.83 | a | 31.67 | 34.68 | 39.56 | ||||||||||||
1953 | 40.90 | 34.82 | 35.71 | 38.30 | 42.26 | 45.40 | 48.06 | 51.10 | a | 44.63 | 41.29 | 39.73 | 37.39 | 41.63 | ||||||||||||
1954 | 31.00 | a | 35.29 | 28.81 | 35.83 | 40.68 | ----- | z | 47.81 | 50.39 | 47.30 | 39.23 | 40.00 | 34.03 | 39.12 | a | ||||||||||
1955 | 33.71 | 30.96 | 30.32 | 33.07 | 36.74 | 48.17 | 49.84 | 46.10 | 45.00 | 38.97 | 33.50 | 32.55 | 38.24 | |||||||||||||
1956 | 32.87 | 29.72 | 33.26 | 36.63 | 42.71 | 46.00 | 52.06 | 48.39 | 42.87 | 42.00 | 30.93 | a | 32.35 | 39.15 | ||||||||||||
1957 | 22.94 | 31.29 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.70 | ----- | z | ----- | z | ----- | z | 33.31 | i | |||
1958 | 35.16 | 39.54 | 33.19 | 37.00 | 45.26 | 52.33 | 53.94 | 51.68 | 46.93 | 42.42 | 35.70 | 39.00 | 42.68 | |||||||||||||
1959 | 35.16 | 33.64 | 35.55 | 38.67 | 38.71 | 47.00 | 51.35 | 48.52 | 46.37 | 42.16 | 35.90 | 33.42 | 40.54 | |||||||||||||
1960 | 32.74 | 33.21 | 35.52 | 39.50 | 41.71 | 45.67 | 50.10 | 51.71 | 42.03 | 44.03 | a | 34.50 | 32.84 | 40.30 | ||||||||||||
1961 | 35.87 | 39.14 | 37.74 | 38.13 | 41.10 | 48.50 | 52.90 | 52.03 | 46.00 | 39.26 | 32.33 | 34.58 | 41.47 | |||||||||||||
1962 | 32.13 | 34.64 | 33.48 | 39.87 | 42.87 | 45.13 | 49.61 | 51.23 | 46.07 | 43.23 | 40.10 | 37.03 | 41.28 | |||||||||||||
1963 | 28.19 | 39.71 | 34.58 | 39.73 | 41.77 | 47.27 | 50.58 | 51.58 | 51.47 | 42.29 | 38.63 | 35.13 | 41.75 | |||||||||||||
1964 | 36.06 | 32.24 | 34.90 | 37.53 | 39.48 | 46.73 | ----- | z | 50.26 | 45.63 | 39.65 | 35.60 | 31.26 | 39.03 | a | |||||||||||
1965 | 34.90 | 36.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.65 | j | ||
1966 | 33.45 | 29.93 | n | 34.35 | 36.63 | 37.97 | 44.41 | a | 48.26 | 47.29 | 46.00 | 37.00 | 36.34 | a | 38.03 | 39.98 | a | |||||||||
1967 | 35.58 | 33.68 | 32.61 | 33.13 | 40.90 | 49.43 | 48.10 | 50.35 | 45.00 | a | 42.61 | 35.10 | 31.81 | 39.86 | ||||||||||||
1968 | 32.27 | a | 31.31 | 36.54 | c | 34.80 | 39.93 | a | 43.97 | 49.32 | 47.90 | 46.27 | 38.42 | 36.10 | 30.17 | a | 38.92 | |||||||||
1969 | 26.26 | 28.89 | 29.03 | a | 34.97 | a | 41.03 | 51.87 | 47.50 | a | 43.94 | 45.37 | 36.97 | 35.23 | 33.83 | a | 37.91 | |||||||||
1970 | 31.90 | 32.61 | 30.55 | 33.17 | 38.03 | 45.00 | 49.16 | 46.71 | 41.17 | 36.90 | 34.73 | 32.42 | 37.70 | |||||||||||||
1971 | 33.42 | 32.11 | 31.94 | 34.80 | 41.23 | 44.00 | 49.42 | 49.97 | 42.90 | 37.94 | 37.37 | 31.55 | 38.89 | |||||||||||||
1972 | 28.48 | 31.69 | 36.26 | 33.17 | 42.43 | a | 47.10 | 47.94 | 49.45 | 41.77 | 35.16 | 37.00 | a | 28.26 | 38.23 | |||||||||||
1973 | 29.39 | 31.00 | 34.52 | 34.83 | 40.26 | 45.53 | 48.68 | 46.68 | 45.30 | 40.03 | 34.43 | 36.97 | 38.97 | |||||||||||||
1974 | 27.03 | 33.93 | 34.19 | 38.73 | 40.42 | 46.10 | 48.06 | 51.68 | 44.90 | 36.26 | 37.53 | 35.00 | a | 39.49 | ||||||||||||
1975 | 33.68 | 32.54 | 31.81 | 32.48 | a | 41.00 | 46.57 | 50.61 | 51.32 | 42.69 | a | 42.65 | 36.63 | 34.10 | 39.67 | |||||||||||
1976 | 34.23 | 31.55 | 31.58 | 34.67 | 40.32 | 43.70 | 48.81 | 51.35 | 47.83 | 39.30 | a | 37.20 | 34.80 | a | 39.61 | |||||||||||
1977 | 28.68 | 33.39 | 32.58 | 35.53 | 39.39 | 47.70 | 47.00 | 52.97 | 45.77 | 38.55 | 33.30 | 34.90 | 39.15 | |||||||||||||
1978 | 35.65 | 38.15 | a | 36.32 | 38.50 | 40.42 | 48.63 | 51.87 | 48.88 | o | 48.13 | 38.77 | ----- | z | 26.87 | a | 40.33 | b | ||||||||
1979 | 23.29 | 32.54 | 34.58 | 37.93 | 42.10 | 45.62 | a | 50.21 | c | 51.87 | 47.87 | 41.61 | 31.80 | 34.61 | 39.50 | |||||||||||
1980 | 24.42 | 34.83 | 34.74 | 36.23 | 42.03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.09 | s | 39.39 | 35.27 | f | ||||||
1981 | 35.52 | 36.07 | 36.26 | 38.53 | 44.03 | 48.63 | 50.74 | 51.55 | 48.23 | 40.19 | 39.03 | 35.61 | 42.03 | |||||||||||||
1982 | 32.71 | 34.61 | 34.19 | 34.33 | 42.39 | 50.10 | 51.03 | 51.77 | 48.70 | 43.58 | 34.55 | a | 33.74 | 40.98 | ||||||||||||
1983 | 38.32 | 38.57 | 38.65 | 36.43 | 46.52 | 49.18 | b | 52.83 | a | 52.43 | c | 44.90 | 40.00 | 40.10 | 28.26 | 42.18 | ||||||||||
1984 | 34.61 | 36.44 | m | 37.32 | 35.17 | 39.84 | 45.57 | 48.32 | 46.92 | g | 45.10 | 39.74 | 36.50 | 29.19 | 39.14 | b | ||||||||||
1985 | 28.77 | 30.50 | 31.48 | 39.00 | 41.26 | 46.67 | 51.03 | 47.03 | 45.67 | 39.19 | 26.63 | 28.23 | 37.96 | |||||||||||||
1986 | 36.65 | 32.36 | 39.77 | 36.30 | 42.97 | 48.87 | 49.61 | 52.65 | 46.63 | 44.13 | 40.03 | 33.97 | 41.99 | |||||||||||||
1987 | 33.74 | 36.36 | 37.26 | 39.57 | 45.61 | 47.67 | 51.16 | 50.74 | 47.60 | 38.58 | 40.20 | 32.00 | 41.71 | |||||||||||||
1988 | 32.29 | 35.17 | 33.84 | 40.67 | 43.61 | 45.10 | 48.52 | 49.23 | 46.13 | 46.26 | 37.30 | 33.35 | 40.96 | |||||||||||||
1989 | 33.55 | b | 24.39 | 35.42 | 39.73 | 42.65 | 47.97 | 49.94 | 50.23 | 44.10 | 42.35 | 39.97 | 36.39 | 40.56 | ||||||||||||
1990 | 35.68 | 30.46 | ----- | z | 40.43 | 42.23 | 46.77 | 52.97 | 52.94 | 48.37 | 40.39 | 40.20 | 29.33 | d | 41.80 | a | ||||||||||
1991 | 32.66 | b | 38.39 | 36.52 | 37.69 | a | 43.77 | 48.33 | 52.71 | 52.77 | 46.97 | 38.48 | 39.23 | 36.74 | 42.02 | |||||||||||
1992 | 37.26 | 39.90 | 38.71 | 41.50 | 43.58 | 50.43 | 52.48 | 51.65 | 45.13 | 43.16 | 38.80 | 32.23 | 42.90 | |||||||||||||
1993 | 27.20 | a | 27.07 | 35.58 | 41.30 | 47.29 | 48.83 | 51.84 | 51.97 | 45.00 | 43.48 | 31.23 | 35.39 | 40.52 | ||||||||||||
1994 | 38.61 | 33.11 | 36.61 | 42.17 | 43.39 | 46.10 | 51.97 | b | 50.55 | 49.73 | 38.61 | 33.07 | 33.47 | a | 41.45 | |||||||||||
1995 | 34.26 | 36.79 | 35.29 | 38.13 | 45.23 | 48.10 | ----- | z | 48.65 | 50.87 | 43.00 | a | 39.59 | a | 35.03 | 41.36 | a | |||||||||
1996 | 32.90 | b | 31.03 | 34.81 | 41.30 | 42.00 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.59 | c | 31.45 | 35.30 | e | ||||
1997 | 32.16 | 31.00 | 34.45 | 35.70 | 43.10 | 44.70 | 48.77 | 51.39 | m | 46.60 | 40.45 | 37.86 | a | 33.77 | 38.96 | a | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 32.19 | 33.33 | 34.70 | 37.44 | 41.67 | 46.83 | 49.72 | 49.97 | 45.97 | 41.05 | 36.30 | 33.73 | 40.35 | |||||||||||||
S.D. | 4.51 | 3.28 | 2.39 | 2.44 | 2.15 | 2.55 | 1.84 | 2.14 | 2.33 | 2.55 | 3.08 | 3.22 | 1.47 | |||||||||||||
SKEW | -0.96 | -0.27 | -0.23 | -0.02 | -0.05 | 1.78 | 0.39 | -0.63 | -0.08 | -0.21 | -0.46 | -0.17 | 0.07 | |||||||||||||
MAX | 40.90 | 39.90 | 39.77 | 42.40 | 47.29 | 59.70 | 54.13 | 53.39 | 51.47 | 46.55 | 41.69 | 40.71 | 42.91 | |||||||||||||
MIN | 19.20 | 23.57 | 28.81 | 32.48 | 35.37 | 41.57 | 46.10 | 43.94 | 39.87 | 34.84 | 26.63 | 26.23 | 37.70 | |||||||||||||
YRS | 76 | 76 | 74 | 75 | 75 | 73 | 72 | 71 | 76 | 75 | 76 | 72 | 52 |