YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.67 | s | 36.43 | 36.42 | 36.43 | j | ||
1941 | 39.43 | j | 40.24 | c | 38.00 | 39.55 | a | 44.32 | 47.67 | 55.03 | b | 50.52 | 43.79 | b | 41.84 | 37.13 | 33.13 | 42.84 | a | |||||||
1942 | 28.77 | 31.46 | 28.61 | 34.96 | e | 42.05 | l | 43.77 | 51.84 | 51.32 | 45.00 | 41.52 | 34.07 | 33.81 | 38.65 | a | ||||||||||
1943 | ----- | z | ----- | z | 37.84 | ----- | z | ----- | z | ----- | z | ----- | z | 47.90 | 49.43 | 41.78 | h | 35.83 | 32.00 | 40.60 | g | |||||
1944 | 29.23 | 33.41 | 34.13 | 36.83 | 42.58 | 46.97 | a | 51.61 | 46.77 | ----- | z | 46.00 | x | 37.00 | 34.97 | 39.35 | b | |||||||||
1945 | 31.74 | 35.00 | 32.87 | 37.00 | 43.48 | 47.17 | 60.45 | 58.84 | 51.25 | j | 45.42 | 39.20 | 36.29 | 42.50 | a | |||||||||||
1946 | 29.58 | 30.29 | 35.58 | 37.27 | 42.43 | a | 44.45 | a | 52.00 | i | ----- | z | 54.77 | 38.37 | a | 34.60 | 35.13 | 38.25 | b | |||||||
1947 | 27.97 | 35.82 | 39.55 | 42.70 | 47.10 | 48.73 | 49.03 | 51.10 | 46.20 | 44.52 | 33.77 | 31.39 | 41.49 | |||||||||||||
1948 | 30.52 | 29.90 | 33.19 | 38.63 | 40.39 | 50.47 | 51.45 | 49.71 | 49.30 | 41.48 | 33.87 | 30.48 | 39.95 | |||||||||||||
1949 | 22.26 | 30.79 | 38.87 | 39.60 | 44.65 | 50.00 | 50.29 | 52.19 | 52.13 | 39.32 | ----- | z | 30.87 | 41.00 | a | |||||||||||
1950 | 29.55 | 32.07 | 33.71 | 37.63 | 42.52 | 47.83 | 54.94 | 51.77 | 47.70 | 44.17 | a | 40.23 | 38.26 | 41.70 | ||||||||||||
1951 | 32.63 | a | 35.00 | 33.29 | 40.37 | 44.97 | 49.66 | a | 50.68 | 52.03 | 48.50 | 42.00 | 37.67 | 32.17 | b | 41.58 | ||||||||||
1952 | 33.32 | 34.31 | 34.32 | 41.60 | 44.26 | 46.60 | 56.74 | 51.61 | 50.43 | 43.73 | a | 32.67 | 36.26 | 42.15 | ||||||||||||
1953 | 38.33 | a | 32.93 | 34.39 | 38.93 | a | 40.19 | 43.63 | 44.39 | 43.32 | 46.50 | 38.90 | 38.43 | 31.84 | 39.32 | |||||||||||
1954 | 31.73 | a | 33.71 | 34.13 | 42.90 | 42.65 | 46.83 | 47.58 | 45.58 | 45.63 | 40.07 | a | 33.62 | i | 31.33 | a | 40.20 | a | ||||||||
1955 | 28.58 | 30.36 | 32.84 | 35.13 | 41.84 | 46.60 | 48.87 | 49.48 | 46.20 | 42.26 | 35.87 | 39.03 | 39.76 | |||||||||||||
1956 | 39.61 | 31.86 | 37.03 | 38.47 | 43.07 | a | 45.77 | 53.94 | 49.94 | 44.67 | 40.81 | ----- | z | 28.84 | 41.27 | a | ||||||||||
1957 | 28.71 | 36.93 | a | 38.35 | 38.27 | 43.71 | 49.93 | ----- | z | 47.48 | 47.73 | 41.90 | 35.80 | 33.23 | 40.19 | a | ||||||||||
1958 | 32.68 | 42.18 | 33.81 | 37.53 | 44.94 | 49.67 | 54.97 | 55.32 | 44.43 | 42.45 | 37.07 | 33.52 | 42.38 | |||||||||||||
1959 | ----- | z | 31.96 | 34.87 | 39.90 | 40.42 | 48.43 | 52.32 | 50.19 | 45.96 | b | 42.61 | 31.80 | 29.77 | 40.75 | a | ||||||||||
1960 | 34.29 | 34.31 | 39.81 | 38.43 | 42.07 | a | 52.57 | 54.87 | 51.00 | c | 49.23 | 43.58 | 37.07 | 34.42 | 42.64 | |||||||||||
1961 | 34.29 | 37.68 | 36.77 | 39.37 | 41.68 | 51.41 | a | 52.19 | 55.65 | 45.90 | 40.94 | 34.57 | 32.61 | 41.92 | ||||||||||||
1962 | 30.71 | 35.00 | 35.39 | 39.20 | 40.84 | 47.93 | 52.83 | a | 52.16 | 48.33 | 44.06 | 38.30 | 35.58 | 41.70 | ||||||||||||
1963 | 27.68 | 41.54 | 34.39 | 37.57 | 46.65 | 48.90 | 49.71 | 50.74 | 49.70 | 45.48 | 38.13 | 32.19 | 41.89 | |||||||||||||
1964 | 31.19 | 29.66 | 32.94 | 35.87 | 40.58 | 48.33 | 53.13 | 52.00 | 45.13 | 43.29 | 36.83 | 38.00 | 40.58 | |||||||||||||
1965 | 34.71 | 31.04 | 36.45 | 41.53 | 41.48 | 48.37 | 52.97 | 53.26 | 44.47 | 41.87 | 39.53 | 28.87 | 41.21 | |||||||||||||
1966 | 31.19 | 31.00 | 35.58 | 39.27 | 44.29 | 47.40 | 48.58 | 52.90 | 47.23 | 39.45 | 39.07 | 33.39 | 40.78 | |||||||||||||
1967 | 31.42 | 30.79 | 32.45 | 31.73 | 42.68 | 51.00 | 55.03 | 54.45 | 50.63 | 41.74 | 38.53 | 28.00 | 40.70 | |||||||||||||
1968 | 28.45 | 38.17 | 35.97 | 37.67 | 42.00 | 49.73 | 54.26 | 52.52 | 48.70 | 41.52 | 38.33 | 32.06 | 41.61 | |||||||||||||
1969 | 32.13 | 34.29 | 33.52 | 37.10 | 46.19 | 51.80 | 54.39 | 51.94 | 51.03 | 41.23 | 34.20 | 37.48 | 42.11 | |||||||||||||
1970 | 38.71 | 35.82 | 36.26 | 33.27 | 44.03 | 50.80 | 54.42 | 50.77 | 46.27 | 41.00 | 41.70 | 34.48 | 42.29 | |||||||||||||
1971 | 32.35 | 32.11 | 34.35 | 35.50 | 42.52 | 46.63 | 54.32 | 53.29 | 46.50 | 38.00 | 33.10 | 29.39 | 39.84 | |||||||||||||
1972 | 28.71 | 35.55 | 38.23 | 36.57 | 42.39 | 49.33 | 53.81 | 53.71 | 46.23 | 43.26 | 35.97 | 27.71 | 40.95 | |||||||||||||
1973 | 30.61 | 37.07 | 32.74 | 37.67 | 44.42 | 49.20 | 52.26 | 48.55 | 46.63 | 39.90 | 38.77 | 34.97 | 41.07 | |||||||||||||
1974 | 30.06 | 28.86 | 36.23 | 37.50 | 41.68 | 48.97 | 51.35 | 50.03 | 45.57 | 37.94 | 30.57 | 28.61 | 38.95 | |||||||||||||
1975 | 24.74 | 29.96 | 36.23 | 34.37 | 43.03 | 49.67 | 53.16 | 52.87 | 51.53 | 42.90 | 34.40 | 32.45 | 40.44 | |||||||||||||
1976 | 28.68 | 34.52 | 32.19 | 36.60 | 43.58 | 47.30 | 54.84 | 52.10 | 50.97 | 42.65 | 38.60 | 28.00 | 40.83 | |||||||||||||
1977 | 29.43 | a | 34.39 | 32.23 | 38.60 | 39.87 | 54.33 | 53.48 | 55.61 | 51.13 | 43.81 | 37.03 | 38.06 | 42.33 | ||||||||||||
1978 | 38.29 | 37.79 | 42.29 | 38.10 | 42.68 | 49.30 | 54.77 | 54.97 | 48.37 | 43.68 | 32.97 | 27.81 | 42.58 | |||||||||||||
1979 | 32.52 | b | 34.29 | 38.45 | 38.77 | 44.42 | 47.70 | 53.45 | 51.71 | 50.30 | 46.19 | 37.00 | 32.90 | 42.31 | ||||||||||||
1980 | 34.97 | 40.18 | a | 35.10 | 39.23 | 41.42 | 44.57 | 53.19 | 52.32 | 47.87 | 42.61 | 35.90 | 32.74 | 41.68 | ||||||||||||
1981 | 35.10 | 36.46 | 36.48 | 38.87 | 44.65 | 51.77 | 52.81 | 52.48 | 50.27 | 40.65 | 41.53 | 38.16 | 43.27 | |||||||||||||
1982 | 28.80 | a | 34.29 | 34.90 | 36.17 | 43.06 | 49.71 | b | 52.35 | 46.16 | 29.57 | w | ----- | z | 37.52 | e | 32.82 | c | 39.58 | b | ||||||
1983 | ----- | z | ----- | z | ----- | z | 39.07 | 45.61 | 50.10 | 52.84 | 55.19 | 52.68 | b | 46.81 | 38.87 | 39.31 | b | 46.72 | c | |||||||
1984 | 33.97 | a | 35.82 | a | 38.94 | 38.07 | ----- | z | 50.07 | a | 58.13 | ----- | z | 51.13 | 41.67 | a | 38.75 | b | 31.13 | 41.77 | b | |||||
1985 | 30.26 | ----- | z | 33.41 | b | 42.67 | ----- | z | 54.53 | 58.61 | ----- | z | 50.07 | ----- | z | 32.41 | c | 32.07 | a | 41.75 | d | |||||
1986 | ----- | z | 41.11 | 41.23 | 40.93 | ----- | z | 53.30 | 57.23 | 57.39 | 48.28 | a | 42.77 | 35.93 | 33.17 | a | 45.13 | b | ||||||||
1987 | 30.17 | g | 34.36 | 36.61 | 41.43 | b | 47.68 | 53.03 | a | 51.70 | a | 54.74 | 49.47 | ----- | z | 37.62 | a | ----- | z | 45.18 | c | |||||
1988 | ----- | z | 33.93 | 35.87 | 41.83 | ----- | z | 50.13 | ----- | z | 55.94 | ----- | z | ----- | z | 39.76 | e | 33.20 | k | 42.91 | f | |||||
1989 | 28.90 | j | 30.70 | h | 38.87 | h | 42.90 | j | 44.18 | i | 51.59 | h | 52.20 | k | 53.13 | h | 49.67 | i | ----- | z | 34.00 | n | 28.85 | k | ----- | z |
1990 | 30.68 | i | 30.29 | k | 37.09 | i | 43.14 | i | 43.86 | i | 48.86 | i | 57.86 | j | 57.26 | h | 50.05 | k | 44.27 | i | 32.60 | j | 25.50 | k | ----- | z |
1991 | 30.09 | i | 35.88 | k | 33.71 | j | 37.36 | h | 41.77 | i | 46.70 | j | 58.09 | i | 53.05 | l | 53.63 | k | 47.50 | i | 38.94 | m | 31.71 | j | ----- | z |
1992 | 31.27 | i | 39.26 | j | 38.68 | i | 42.95 | i | 48.55 | k | 54.45 | h | 55.36 | i | 56.00 | j | 50.90 | i | 47.00 | i | 36.25 | j | 30.64 | i | ----- | z |
1993 | 32.63 | l | 34.22 | j | 41.74 | h | 39.00 | h | 45.89 | m | 50.73 | h | 53.64 | i | 53.05 | i | 48.95 | j | 46.38 | j | 33.89 | l | 30.88 | o | ----- | z |
1994 | 30.83 | m | 31.72 | j | 37.77 | i | 39.81 | i | 46.24 | j | 48.05 | i | 59.05 | l | 53.00 | l | 51.00 | i | 41.89 | l | 30.94 | l | 29.94 | o | ----- | z |
1995 | 39.95 | j | 37.72 | j | 37.91 | i | 38.12 | n | 44.95 | k | 50.38 | i | 54.20 | k | 54.00 | h | 51.55 | j | 41.59 | n | 40.30 | j | 38.94 | m | ----- | z |
1996 | 34.10 | k | 37.53 | j | 37.67 | j | 39.55 | h | 45.91 | i | 49.85 | j | 57.82 | i | 56.10 | j | ----- | z | 43.11 | v | 39.06 | l | 35.89 | m | ----- | z |
1997 | 36.68 | i | 32.75 | h | ----- | z | 39.64 | h | 49.19 | j | 52.21 | p | 55.68 | l | 55.79 | l | 50.70 | j | 43.42 | l | 41.62 | i | 32.59 | i | ----- | z |
1998 | 38.95 | l | 37.28 | c | 38.83 | h | 39.94 | m | 42.06 | m | 50.83 | l | 57.14 | i | 56.65 | k | 54.00 | j | 41.38 | j | 38.13 | o | 29.75 | k | 37.28 | k |
1999 | 31.33 | m | 33.83 | j | 35.30 | h | 38.11 | k | 43.67 | m | 48.90 | i | 52.00 | l | 54.29 | j | 52.67 | i | 45.25 | k | 40.67 | l | 30.85 | k | ----- | z |
2000 | 34.67 | m | 39.30 | i | 37.13 | h | 42.11 | k | 45.36 | i | 53.95 | j | 53.50 | m | 55.64 | i | 52.10 | j | 43.90 | j | 35.56 | l | 33.22 | m | ----- | z |
2001 | 29.38 | j | 32.68 | i | 39.23 | i | 37.71 | i | 49.86 | i | 52.14 | i | 51.71 | q | 50.11 | c | 46.59 | c | 42.37 | d | 39.07 | c | 36.28 | b | 42.88 | g |
2002 | 32.60 | f | 34.08 | d | 33.67 | d | 40.21 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.88 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.43 | 34.46 | 35.50 | 38.30 | 43.17 | 48.98 | 53.06 | 51.73 | 48.19 | 42.11 | 36.67 | 33.15 | 41.33 | |||||||||||||
S.D. | 3.58 | 3.32 | 2.64 | 2.40 | 1.89 | 2.53 | 2.94 | 3.08 | 2.55 | 2.08 | 2.56 | 3.18 | 1.06 | |||||||||||||
SKEW | 0.25 | 0.48 | 0.31 | -0.25 | 0.39 | 0.02 | -0.24 | -0.31 | 0.32 | -0.00 | -0.32 | 0.12 | -0.49 | |||||||||||||
MAX | 39.61 | 42.18 | 42.29 | 42.90 | 47.68 | 54.53 | 60.45 | 58.84 | 54.77 | 46.81 | 41.70 | 39.31 | 43.27 | |||||||||||||
MIN | 22.26 | 28.86 | 28.61 | 31.73 | 39.87 | 43.63 | 44.39 | 43.32 | 43.79 | 37.94 | 30.57 | 27.71 | 38.95 | |||||||||||||
YRS | 41 | 47 | 48 | 47 | 42 | 47 | 44 | 46 | 45 | 43 | 47 | 48 | 30 |