YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1928 | 34.00 | a | 34.34 | 44.55 | 44.13 | 53.90 | 56.40 | 53.81 | 49.81 | 45.97 | 42.68 | 39.17 | 34.52 | 44.44 | ||||||||||||
1929 | 34.57 | c | 34.21 | d | 35.88 | e | 39.88 | d | 47.89 | d | 54.84 | e | 59.11 | d | 60.37 | d | 56.92 | d | 51.96 | d | 32.46 | d | 37.85 | e | 45.50 | |
1930 | 34.96 | c | 39.96 | c | 39.77 | e | 44.62 | d | 45.39 | c | 55.80 | e | 60.32 | c | 60.88 | e | 51.54 | d | 44.56 | d | 37.28 | e | 28.31 | e | 45.28 | |
1931 | 35.81 | d | 50.88 | d | 39.31 | e | 45.38 | d | 54.04 | e | 55.96 | d | 65.68 | c | 63.15 | d | 49.81 | d | 45.07 | d | 36.12 | d | 35.46 | c | 48.06 | |
1932 | 34.11 | d | 37.96 | d | 41.57 | c | 40.73 | d | 51.04 | e | 56.77 | d | 57.86 | b | 57.62 | b | 55.77 | d | 44.00 | d | 38.23 | d | 30.44 | d | 45.51 | |
1933 | 33.78 | d | 34.33 | d | 38.70 | d | 42.70 | c | 44.11 | d | 50.85 | d | 61.23 | e | 61.59 | d | 52.19 | d | 52.58 | e | 42.52 | c | 35.30 | d | 45.82 | |
1934 | 36.11 | d | 41.68 | c | 44.59 | b | 47.42 | d | 51.41 | b | 55.88 | d | 57.53 | a | 59.55 | b | 54.00 | b | 48.90 | a | 42.17 | 36.00 | a | 47.94 | ||
1935 | 35.63 | a | 38.63 | a | 36.90 | 45.60 | 49.18 | i | 55.00 | b | 56.24 | b | 58.68 | f | 53.07 | 44.00 | 33.87 | 32.07 | a | 43.10 | b | |||||
1936 | 37.08 | e | 38.79 | a | 40.07 | c | 43.27 | 48.87 | 55.50 | 62.29 | 58.52 | 52.13 | 47.19 | 36.63 | 31.48 | 45.99 | ||||||||||
1937 | 29.87 | 37.61 | 40.90 | 42.27 | 48.10 | 56.23 | 60.23 | 56.13 | 50.37 | 46.00 | 40.33 | 38.55 | 45.55 | |||||||||||||
1938 | 36.39 | 41.46 | 41.65 | 46.73 | 52.87 | 59.87 | 63.19 | 60.13 | 58.00 | 48.00 | 35.27 | 39.94 | 48.62 | |||||||||||||
1939 | 36.61 | 35.25 | 42.45 | 48.27 | 51.00 | 55.23 | 61.97 | 59.32 | 57.23 | 46.52 | 39.13 | 38.55 | 47.63 | |||||||||||||
1940 | 42.39 | 45.69 | 46.68 | 49.30 | 54.52 | 58.77 | 58.42 | 57.39 | 53.30 | 48.19 | 38.37 | 40.90 | 49.49 | |||||||||||||
1941 | 42.71 | 47.36 | 45.97 | 45.07 | 51.42 | 54.13 | 63.77 | 58.35 | 50.93 | 46.13 | 41.87 | 41.06 | 49.06 | |||||||||||||
1942 | 40.77 | 37.86 | 39.55 | 46.07 | 47.48 | 54.53 | 61.87 | 59.03 | 53.77 | 48.29 | 40.93 | 39.13 | 47.44 | |||||||||||||
1943 | 36.35 | 40.79 | 45.90 | 46.93 | 49.23 | 51.30 | 58.74 | 54.55 | 55.07 | 47.84 | 40.00 | 38.26 | 47.08 | |||||||||||||
1944 | 36.65 | 39.31 | 39.52 | 42.90 | 50.52 | 53.40 | 57.84 | 56.23 | 55.03 | 47.80 | a | 41.73 | 37.43 | c | 46.53 | |||||||||||
1945 | 35.39 | 38.75 | 38.71 | 41.20 | 48.16 | 53.13 | 60.83 | b | 54.93 | a | 51.93 | 47.23 | a | 39.37 | 38.32 | 45.66 | ||||||||||
1946 | 32.39 | 34.63 | a | 39.58 | 43.73 | 49.68 | 53.70 | 59.39 | 58.00 | 53.87 | 44.03 | a | 36.20 | 38.87 | 45.34 | |||||||||||
1947 | 30.35 | 40.36 | 42.93 | a | 46.82 | b | 53.10 | a | 57.40 | 56.61 | 56.32 | 53.70 | 48.29 | 35.00 | 33.35 | 46.19 | ||||||||||
1948 | 34.16 | 33.55 | 38.52 | 45.13 | 47.16 | 55.33 | 57.81 | 56.06 | 50.64 | h | 45.94 | 34.20 | 33.74 | 43.78 | a | |||||||||||
1949 | 26.42 | 33.82 | 41.52 | 45.93 | 50.06 | 57.17 | 58.77 | 54.94 | 53.03 | 41.16 | 39.93 | 31.29 | 44.50 | |||||||||||||
1950 | 31.55 | 38.75 | 38.42 | 45.27 | 48.42 | 52.90 | 61.32 | 56.84 | 53.10 | ----- | z | 45.03 | 43.10 | 46.79 | a | |||||||||||
1951 | 36.32 | 36.43 | 36.87 | 43.50 | 46.72 | b | 49.93 | a | 55.24 | f | 57.13 | p | ----- | z | ----- | z | 43.69 | a | 36.33 | a | 41.23 | d | ||||
1952 | 37.00 | 39.45 | 39.84 | 45.93 | 53.32 | 54.73 | 60.14 | j | 56.69 | e | 57.03 | 49.00 | 37.47 | 40.03 | 46.41 | a | ||||||||||
1953 | 42.42 | g | 34.93 | 38.68 | 43.27 | ----- | z | 51.53 | 60.52 | 56.26 | 56.07 | 44.16 | 43.17 | 34.81 | 46.34 | b | ||||||||||
1954 | 36.48 | 40.89 | 40.10 | 47.97 | 51.74 | 54.27 | 60.74 | 55.19 | 51.77 | 45.00 | a | 41.50 | 37.35 | 46.92 | ||||||||||||
1955 | 34.77 | 34.61 | 38.16 | 39.77 | 50.48 | 54.56 | e | 56.71 | 58.48 | 53.30 | 47.29 | 36.80 | 41.61 | 45.55 | ||||||||||||
1956 | 42.06 | 34.69 | 39.00 | 46.00 | 51.26 | 56.03 | a | 59.81 | 56.66 | b | 54.80 | 46.84 | 35.67 | 32.48 | 46.27 | |||||||||||
1957 | 32.94 | 45.32 | 42.94 | 45.47 | 51.61 | 57.87 | 60.97 | 56.39 | 56.38 | a | 47.61 | 39.67 | 36.23 | 47.78 | ||||||||||||
1958 | 36.76 | f | 43.96 | 42.81 | 46.07 | 53.81 | 57.10 | 61.94 | 65.39 | 58.77 | 52.52 | 38.83 | 35.55 | 50.61 | a | |||||||||||
1959 | 40.81 | 37.96 | 42.42 | 47.60 | 49.13 | 57.83 | 63.19 | 59.73 | a | 53.67 | 50.26 | 37.43 | 32.35 | 47.70 | ||||||||||||
1960 | 33.74 | 38.31 | 42.20 | a | 44.80 | 47.23 | 60.90 | 65.03 | 59.48 | 55.03 | 45.97 | 40.67 | 35.00 | 47.36 | ||||||||||||
1961 | 32.97 | a | 38.81 | a | 40.71 | 47.27 | 48.32 | 58.70 | 62.58 | 62.29 | 53.50 | 46.55 | 37.17 | 36.48 | 47.11 | |||||||||||
1962 | 30.97 | 39.07 | 38.29 | 45.30 | 47.48 | 54.43 | 58.42 | 57.16 | 51.73 | 46.48 | 39.03 | 35.57 | a | 45.33 | ||||||||||||
1963 | 29.81 | 46.74 | a | 40.81 | 44.77 | 52.87 | 54.80 | 56.87 | 59.29 | 59.03 | 50.77 | 43.83 | 35.23 | 47.90 | ||||||||||||
1964 | 35.29 | 33.79 | 38.81 | 44.50 | 48.39 | 55.63 | 61.32 | 60.63 | a | 52.23 | 51.57 | a | 39.76 | a | 42.06 | 47.00 | ||||||||||
1965 | 38.37 | a | 37.32 | 42.83 | a | 48.77 | 49.39 | 54.27 | ----- | z | 61.84 | 52.00 | 48.94 | 44.87 | 34.68 | 46.66 | a | |||||||||
1966 | 33.61 | 34.89 | a | 41.73 | a | 48.70 | ----- | z | 57.73 | 58.68 | 61.50 | a | 55.30 | 47.65 | 44.28 | a | 39.59 | b | 47.60 | a | ||||||
1967 | 36.00 | 39.04 | 42.26 | 42.30 | 52.39 | 56.20 | 64.39 | 64.65 | 59.67 | 47.84 | 46.80 | 31.97 | 48.62 | |||||||||||||
1968 | 34.19 | 46.03 | 43.26 | 45.23 | 50.26 | 58.30 | 62.80 | a | 57.55 | 54.53 | 48.42 | 42.77 | 34.26 | 48.13 | ||||||||||||
1969 | 39.66 | b | 39.89 | 41.19 | 45.77 | 52.58 | 57.14 | a | 62.68 | 61.45 | 58.97 | 45.65 | 40.33 | 35.32 | 48.39 | |||||||||||
1970 | 39.32 | 40.79 | 41.61 | 40.50 | 52.17 | a | 58.17 | 63.84 | 59.83 | a | 54.43 | 47.13 | 42.52 | a | 38.74 | 48.25 | ||||||||||
1971 | 36.13 | a | 36.00 | a | 39.35 | 43.20 | 49.87 | 55.60 | 62.65 | 63.29 | 55.80 | 44.68 | 36.66 | a | 33.58 | g | 47.57 | a | ||||||||
1972 | 33.20 | f | 38.52 | b | 44.41 | b | 45.47 | 51.74 | 59.87 | 62.45 | 61.10 | 54.50 | 51.10 | a | 43.33 | 33.61 | 49.65 | a | ||||||||
1973 | 36.52 | 43.07 | 41.50 | a | 46.50 | 54.81 | 60.80 | 61.53 | a | 60.26 | 54.57 | 48.42 | 39.97 | 37.71 | g | 49.81 | a | |||||||||
1974 | 37.70 | a | 34.50 | 43.42 | 44.23 | 50.94 | 58.83 | 62.35 | 61.00 | a | 57.97 | 51.29 | 39.24 | a | 34.58 | 48.00 | ||||||||||
1975 | 32.77 | a | 37.50 | 39.97 | 39.61 | b | 49.71 | 56.60 | 59.71 | 57.32 | 54.33 | 42.66 | b | 32.83 | a | 30.26 | 44.44 | |||||||||
1976 | 29.06 | 36.69 | 36.36 | c | 41.10 | 51.52 | b | 53.37 | 62.00 | 56.55 | 55.03 | a | 45.40 | a | 40.53 | 27.32 | 44.58 | |||||||||
1977 | 35.58 | 38.52 | a | 38.10 | 45.24 | a | 47.23 | 58.63 | 58.55 | 57.57 | a | 53.53 | 45.19 | 38.30 | 40.63 | a | 46.42 | |||||||||
1978 | 41.77 | 41.68 | 47.87 | 47.66 | a | 50.13 | 55.10 | 59.31 | b | 56.57 | a | 51.77 | d | 48.61 | 38.13 | 31.03 | a | 47.47 | ||||||||
1979 | 37.07 | b | 36.56 | a | 43.68 | 44.53 | 53.00 | 57.73 | 61.65 | 60.16 | 58.00 | 51.06 | 38.07 | 34.10 | 47.97 | |||||||||||
1980 | 42.66 | b | ----- | z | 40.41 | b | ----- | z | 47.47 | n | ----- | z | 63.39 | ----- | z | 53.53 | 47.03 | 37.60 | 35.19 | e | 45.69 | e | ||||
1981 | 40.00 | 39.05 | f | 42.35 | 46.47 | 53.94 | 63.83 | 59.35 | h | 60.85 | e | 56.56 | l | 41.90 | 43.10 | 37.97 | a | 47.82 | c | |||||||
1982 | 32.71 | 37.63 | a | 41.88 | e | 45.38 | a | 47.83 | a | 54.93 | 60.63 | a | 58.91 | h | 54.31 | a | 47.40 | a | 39.21 | a | 34.32 | 45.11 | a | |||
1983 | 36.00 | d | 41.11 | 44.48 | b | 43.83 | 51.26 | 56.59 | a | 58.10 | a | 63.40 | a | 57.96 | c | 50.03 | a | 41.62 | a | 41.29 | 48.81 | |||||
1984 | 37.83 | b | 35.82 | a | 43.43 | a | 44.50 | 54.52 | 56.59 | a | 64.00 | a | 59.45 | b | 58.12 | d | 42.26 | 39.00 | b | 34.07 | b | 47.46 | ||||
1985 | 31.57 | c | 32.80 | c | 36.13 | a | 46.97 | 48.13 | 58.56 | c | 60.21 | g | 56.03 | 54.61 | b | 45.28 | f | 40.71 | b | 35.45 | b | 44.10 | b | |||
1986 | 42.31 | b | ----- | z | 47.13 | a | 47.07 | 52.58 | 58.93 | c | 62.39 | 62.82 | c | 53.59 | c | 47.03 | 38.73 | 36.77 | a | 49.94 | a | |||||
1987 | 32.11 | c | 38.22 | a | 42.60 | a | 49.03 | 55.68 | 59.13 | 59.16 | 60.84 | 57.19 | c | 53.19 | 41.41 | a | 34.87 | 48.62 | ||||||||
1988 | 36.17 | a | 36.10 | 41.32 | 47.90 | 51.03 | 58.33 | 66.55 | 62.40 | a | 57.10 | 50.70 | a | 42.28 | a | 33.94 | 48.65 | |||||||||
1989 | 31.23 | 37.26 | a | 45.46 | e | 49.46 | b | 53.10 | 58.50 | 62.10 | a | 59.45 | 55.63 | 47.45 | b | 37.17 | 31.26 | 47.34 | ||||||||
1990 | 32.90 | 34.46 | 43.06 | 49.80 | 51.65 | 58.73 | 65.20 | a | 63.25 | c | 58.13 | 48.64 | c | 37.03 | a | 28.03 | a | 47.58 | ||||||||
1991 | 34.17 | b | 40.19 | a | 42.48 | 44.77 | 50.45 | 56.31 | a | 64.69 | b | 60.83 | a | 59.89 | b | 52.48 | b | 41.38 | a | 33.52 | b | 48.43 | ||||
1992 | 34.79 | b | 44.25 | a | 47.16 | 49.40 | 56.94 | 59.80 | 63.07 | a | 63.10 | a | 56.93 | 52.45 | 39.79 | a | 33.46 | e | 50.10 | |||||||
1993 | 36.79 | c | 40.73 | b | 46.79 | c | 46.33 | 53.23 | a | 58.50 | 60.93 | c | 60.33 | a | 55.63 | 50.79 | c | 39.13 | 36.45 | b | 48.80 | |||||
1994 | 34.76 | b | 37.00 | a | 43.93 | c | 47.39 | b | 53.53 | a | 58.07 | 62.55 | b | 61.42 | 57.45 | a | 47.97 | 35.32 | e | 35.93 | a | 47.94 | ||||
1995 | 43.52 | b | 44.30 | a | 45.07 | a | 46.52 | a | 52.65 | 56.69 | a | 62.13 | a | 62.13 | a | 58.57 | 48.80 | a | 43.55 | a | 40.73 | a | 50.39 | |||
1996 | 39.52 | b | 44.48 | b | 44.00 | c | 47.52 | c | 53.61 | 58.74 | c | 65.54 | c | 63.93 | d | 54.33 | f | 47.04 | c | 42.38 | d | 41.33 | d | 49.83 | a | |
1997 | 42.08 | f | 38.77 | f | 41.41 | n | 47.74 | g | 57.56 | d | 59.05 | k | 62.74 | h | 64.00 | h | 61.07 | c | 46.79 | g | 45.33 | f | 35.00 | f | 59.31 | j |
1998 | 40.37 | d | 41.50 | b | 44.67 | g | 45.92 | f | 49.17 | a | 57.10 | 63.26 | 63.74 | 60.30 | 46.45 | 39.40 | 32.38 | e | 49.37 | b | ||||||
1999 | 37.04 | g | 38.70 | e | 40.74 | 43.17 | a | 50.86 | i | 55.37 | 60.03 | 59.40 | a | 57.23 | 49.10 | 41.03 | 31.39 | 47.62 | b | |||||||
2000 | 37.58 | l | 43.15 | b | 42.91 | i | 47.30 | 52.67 | a | 61.72 | a | 58.77 | 61.48 | 57.00 | 49.61 | 36.50 | b | 34.90 | a | 50.31 | b | |||||
2001 | 32.37 | a | 38.61 | 43.85 | k | 43.29 | i | 56.83 | a | 59.83 | 62.33 | a | ----- | z | 57.44 | n | 51.37 | l | 42.06 | l | 36.89 | m | 49.99 | g | ||
2002 | 34.58 | l | 34.86 | n | 39.35 | k | 47.95 | i | 50.18 | i | 59.06 | l | 62.79 | l | ----- | z | 56.81 | n | 47.43 | j | 42.83 | l | 36.10 | j | ----- | z |
2003 | 39.70 | k | 34.89 | i | ----- | z | 44.50 | h | 51.97 | a | 59.00 | a | 66.52 | 62.39 | 59.57 | 49.80 | a | 36.00 | 37.33 | a | 52.82 | d | ||||
2004 | 37.53 | a | 38.83 | 45.52 | 47.37 | 52.81 | 58.70 | 63.65 | 61.81 | 55.57 | 49.83 | a | 41.07 | a | 36.61 | c | 49.11 | |||||||||
2005 | 40.45 | b | 41.79 | 44.48 | 44.97 | 54.58 | 57.89 | u | 66.23 | 63.00 | 54.43 | 48.42 | 41.67 | ----- | z | 50.00 | b | |||||||||
2006 | 38.23 | 37.07 | 38.32 | 48.17 | 54.60 | a | 60.94 | l | 66.93 | b | 59.86 | b | 55.53 | 46.29 | 43.70 | 34.17 | g | 48.87 | b | |||||||
2007 | 28.90 | a | 39.25 | ----- | z | 47.44 | c | 53.23 | 59.00 | a | 62.80 | a | 63.97 | a | 56.10 | 47.81 | d | 40.93 | 34.03 | 48.50 | a | |||||
2008 | 37.74 | 37.90 | 41.10 | 43.57 | p | 53.83 | a | 59.20 | 64.13 | 64.03 | 57.10 | 48.58 | s | 44.32 | h | 36.71 | 50.19 | c | ||||||||
2009 | 35.26 | 41.61 | 41.00 | 45.90 | 57.68 | 57.89 | l | 65.23 | i | 62.55 | 60.45 | a | 47.87 | 36.83 | 35.94 | 46.51 | b | |||||||||
2010 | 40.00 | 42.21 | 40.76 | b | 44.79 | b | 49.90 | 62.00 | o | 64.52 | d | 60.11 | c | 57.37 | 52.39 | 39.13 | 41.48 | 48.42 | a | |||||||
2011 | 38.97 | 35.56 | a | 43.03 | 46.30 | 49.60 | a | 57.61 | b | 64.17 | s | 62.13 | 61.26 | c | 52.55 | 40.27 | 29.29 | 46.96 | a | |||||||
2012 | 33.58 | 38.83 | 42.74 | 48.30 | 52.62 | g | 58.50 | h | 61.29 | 64.54 | e | 58.06 | l | 58.12 | w | 43.44 | l | 31.58 | 45.84 | e | ||||||
2013 | 36.30 | u | 34.73 | f | 46.71 | g | 48.27 | h | 49.00 | a | 62.67 | 67.19 | e | 62.87 | 58.97 | 45.90 | 40.57 | 29.77 | 52.12 | d | ||||||
2014 | 34.81 | 42.86 | 46.03 | 49.37 | 55.68 | 60.17 | 67.58 | 65.06 | 61.52 | a | 52.06 | 43.45 | a | 42.97 | 51.80 | |||||||||||
2015 | 38.42 | 43.54 | 47.13 | 48.17 | 53.39 | 63.77 | 66.55 | 64.42 | 61.13 | 55.74 | 38.52 | a | 35.35 | 51.34 | ||||||||||||
2016 | 41.03 | b | 41.57 | f | 46.03 | b | 50.92 | e | 55.62 | b | 62.11 | b | 63.13 | 62.48 | 56.41 | c | 50.67 | a | 43.20 | 36.13 | 51.61 | a | ||||
2017 | 39.10 | a | 45.82 | 44.06 | 47.60 | 54.66 | b | 61.53 | 67.23 | 67.81 | 60.23 | 46.03 | 44.73 | 31.58 | 50.87 | |||||||||||
2018 | 42.07 | q | 36.96 | 42.48 | 49.10 | 54.62 | b | ----- | z | 68.74 | 62.90 | 57.40 | 49.81 | 41.10 | 41.23 | 50.43 | b | |||||||||
2019 | 40.90 | 37.89 | 43.46 | g | ----- | z | ----- | z | ----- | z | 67.35 | k | 64.90 | 58.23 | 44.39 | 39.93 | 41.69 | b | 46.85 | e | ||||||
2020 | 38.03 | 36.93 | 42.68 | 49.47 | 55.06 | 57.47 | m | 64.70 | a | 67.19 | 61.10 | 55.20 | k | ----- | z | ----- | z | 51.90 | d | |||||||
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.07 | 39.12 | 41.86 | 45.73 | 51.52 | 57.03 | 61.83 | 60.24 | 55.71 | 47.91 | 39.73 | 35.72 | 47.46 | |||||||||||||
S.D. | 3.63 | 3.67 | 2.84 | 2.51 | 2.86 | 2.80 | 3.02 | 3.21 | 3.02 | 2.89 | 2.94 | 3.69 | 1.73 | |||||||||||||
SKEW | -0.07 | 0.66 | 0.05 | -0.47 | -0.10 | 0.02 | -0.02 | -0.27 | -0.19 | 0.07 | -0.15 | 0.01 | 0.27 | |||||||||||||
MAX | 43.52 | 50.88 | 47.87 | 50.92 | 57.68 | 63.83 | 68.74 | 67.81 | 61.52 | 55.74 | 46.80 | 43.10 | 51.80 | |||||||||||||
MIN | 26.42 | 32.80 | 35.88 | 39.61 | 44.11 | 49.93 | 53.81 | 49.81 | 45.97 | 41.16 | 32.46 | 27.32 | 44.44 | |||||||||||||
YRS | 83 | 85 | 84 | 84 | 85 | 82 | 83 | 86 | 86 | 84 | 87 | 85 | 55 |