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 | 77.93 | p | 77.40 | 65.23 | a | 56.90 | 52.19 | 62.93 | h | |||
1934 | 47.03 | 51.86 | 61.93 | a | 64.62 | a | 74.65 | 76.90 | a | 83.28 | b | 77.48 | 72.93 | 69.10 | 54.13 | 47.32 | 65.10 | |||||||||
1935 | 46.32 | 46.65 | b | 47.83 | a | 59.00 | 60.71 | 78.70 | 80.23 | a | 75.42 | 72.93 | a | 66.07 | b | 51.93 | b | 46.55 | 61.03 | |||||||
1936 | 45.23 | a | 41.45 | 50.42 | 61.87 | 71.45 | 80.70 | 82.45 | b | 79.42 | 71.20 | 64.61 | 55.97 | 47.76 | f | 64.07 | a | |||||||||
1937 | 35.46 | c | 43.84 | c | 43.58 | l | 61.47 | 73.61 | 79.97 | a | 84.68 | 86.13 | 80.00 | 68.73 | i | 58.68 | b | 49.10 | 65.29 | b | ||||||
1938 | 48.35 | 46.28 | c | 50.74 | 61.80 | 70.68 | 81.03 | ----- | z | ----- | z | 79.20 | t | 66.74 | 54.97 | 50.06 | 58.96 | c | ||||||||
1939 | 42.58 | 37.04 | 50.97 | 62.96 | d | 75.57 | a | 80.80 | e | 82.55 | 78.74 | 72.77 | ----- | z | ----- | z | ----- | z | 64.89 | c | ||||||
1940 | 44.73 | a | 45.66 | 55.90 | 61.43 | g | 72.48 | 80.40 | 82.58 | 80.81 | e | 71.73 | 65.48 | 50.47 | 48.87 | 63.56 | a | |||||||||
1941 | 42.52 | 45.54 | 50.27 | a | 48.97 | 65.61 | 72.63 | 78.23 | 75.03 | 71.07 | 52.25 | s | 53.50 | 43.29 | 58.79 | a | ||||||||||
1942 | 45.23 | 41.50 | 47.10 | 55.10 | 67.90 | 78.37 | 82.90 | 76.42 | 74.10 | 60.48 | 56.30 | 46.35 | 60.98 | |||||||||||||
1943 | 42.23 | 48.57 | 50.52 | 63.20 | 69.87 | 76.17 | 81.35 | 77.19 | 74.37 | 62.77 | 55.70 | 43.45 | 62.12 | |||||||||||||
1944 | 42.61 | 41.38 | 45.77 | 55.67 | 67.52 | 76.20 | 79.58 | 80.16 | 73.57 | 63.71 | 47.80 | 46.10 | a | 60.01 | ||||||||||||
1945 | 46.16 | 46.75 | 45.58 | 58.10 | 68.77 | 76.67 | 81.39 | 79.93 | a | 74.90 | 65.23 | 55.20 | 45.55 | 62.02 | ||||||||||||
1946 | 42.16 | 48.50 | 53.74 | 65.47 | 67.97 | 81.97 | 79.55 | 76.26 | 73.33 | 60.68 | 47.63 | 50.68 | 62.33 | |||||||||||||
1947 | 41.48 | 51.21 | 53.61 | 59.67 | 70.42 | 75.27 | 81.90 | 75.65 | 75.23 | 65.55 | 45.27 | 41.81 | 61.42 | |||||||||||||
1948 | 48.93 | a | 42.43 | a | 43.00 | 62.63 | 71.71 | 78.33 | 81.19 | 79.29 | 76.70 | 63.90 | 50.20 | 45.48 | 61.98 | |||||||||||
1949 | 34.26 | 41.93 | 51.48 | 60.87 | 68.65 | 75.63 | 76.74 | 78.26 | 75.37 | 60.10 | 61.70 | 43.74 | 60.73 | |||||||||||||
1950 | 42.97 | 54.14 | n | 54.19 | 64.77 | 67.52 | 79.17 | 76.87 | 77.39 | 70.90 | 72.48 | 61.13 | 55.39 | 65.71 | a | |||||||||||
1951 | 45.13 | a | 47.64 | 49.58 | 57.67 | 65.19 | e | 81.52 | i | 81.74 | 77.58 | 78.57 | 66.25 | o | 50.17 | g | 43.26 | 60.71 | c | |||||||
1952 | 45.16 | 45.93 | 42.58 | 62.56 | e | 75.80 | a | 79.93 | 79.29 | 80.33 | v | 73.25 | j | 71.96 | f | 48.17 | a | 42.18 | c | 57.96 | c | |||||
1953 | 50.60 | a | 48.42 | b | 55.85 | d | 60.37 | 62.32 | 79.90 | 81.06 | 78.00 | 79.90 | 66.26 | 57.03 | 44.19 | 63.66 | ||||||||||
1954 | 48.26 | 54.25 | 49.57 | a | 66.87 | 70.77 | 78.27 | 79.77 | 76.39 | 75.33 | 69.65 | 59.93 | 47.06 | 64.68 | ||||||||||||
1955 | 39.03 | 40.25 | 52.68 | 59.17 | 67.52 | 75.80 | 77.23 | 75.42 | 76.20 | 69.39 | 53.87 | 49.74 | 61.36 | |||||||||||||
1956 | 49.23 | 39.41 | 55.87 | 56.63 | 71.42 | 81.73 | 78.29 | 77.68 | 81.20 | 69.33 | a | 52.90 | 47.97 | 63.47 | ||||||||||||
1957 | 43.13 | 53.37 | a | 51.29 | 56.67 | 64.43 | c | 78.44 | e | 79.97 | 75.61 | 76.00 | 60.68 | 46.73 | 50.97 | 61.44 | ||||||||||
1958 | 45.19 | 48.75 | 43.42 | 57.30 | 73.65 | 80.43 | 82.39 | 79.42 | 72.57 | 64.74 | 53.97 | 55.53 | a | 63.11 | ||||||||||||
1959 | 49.42 | 45.25 | 54.32 | 63.83 | 69.39 | 82.03 | 84.03 | 74.97 | 74.10 | 65.83 | a | 53.07 | 46.87 | 63.59 | ||||||||||||
1960 | 39.61 | 39.79 | 55.81 | 62.67 | 68.23 | 80.87 | 83.32 | 81.06 | 77.17 | 62.80 | a | 56.10 | 45.23 | 62.72 | ||||||||||||
1961 | 49.58 | 47.50 | 50.84 | 61.03 | 70.65 | 82.30 | 82.32 | 75.45 | 70.33 | 64.90 | 48.73 | 43.10 | 62.23 | |||||||||||||
1962 | 41.06 | 47.14 | 44.26 | 65.83 | 67.19 | 76.80 | 79.29 | 81.10 | 72.97 | 65.74 | 57.50 | 49.43 | a | 62.36 | ||||||||||||
1963 | 41.84 | 51.46 | 50.71 | 59.83 | 72.97 | 76.77 | 82.52 | 74.16 | 75.63 | 69.00 | 53.30 | 50.13 | 63.19 | |||||||||||||
1964 | 42.19 | 39.76 | 45.77 | 55.67 | 69.35 | 76.70 | 79.74 | 75.87 | 70.53 | 70.00 | 49.63 | 44.16 | 59.95 | |||||||||||||
1965 | 45.94 | 43.21 | 45.10 | 55.53 | 64.48 | 71.20 | 77.97 | 78.74 | 71.23 | 67.84 | 55.53 | 44.97 | 60.15 | |||||||||||||
1966 | 40.77 | 39.96 | 54.87 | 63.50 | d | 73.00 | 77.90 | 83.65 | 80.23 | 73.07 | 65.90 | 57.37 | 46.90 | 63.09 | ||||||||||||
1967 | 46.84 | 51.14 | 56.52 | 57.60 | 67.03 | 74.33 | 79.45 | 76.90 | 72.47 | 68.61 | 57.03 | 41.06 | 62.42 | |||||||||||||
1968 | 44.68 | 50.66 | 51.42 | 55.97 | 68.39 | 80.13 | 79.61 | 73.39 | 73.97 | 68.52 | 52.20 | 43.06 | 61.83 | |||||||||||||
1969 | 47.00 | 44.39 | 46.39 | 63.03 | 70.29 | 77.87 | 81.10 | 80.39 | 75.30 | 62.68 | 52.83 | 49.20 | a | 62.54 | ||||||||||||
1970 | 45.26 | 51.89 | 47.26 | 55.87 | 71.19 | 79.70 | 81.87 | 79.39 | 72.03 | 61.23 | 58.03 | 48.00 | 62.64 | |||||||||||||
1971 | 47.71 | 47.93 | 57.42 | 59.77 | 67.13 | 81.13 | 84.77 | 77.16 | 74.00 | 58.10 | 54.53 | 40.35 | 62.50 | |||||||||||||
1972 | 49.97 | 52.62 | 63.68 | 64.77 | 71.84 | 74.57 | 82.81 | 80.26 | 74.37 | 62.58 | 48.03 | 43.81 | 64.11 | |||||||||||||
1973 | 39.77 | 43.86 | 42.81 | 53.67 | 68.35 | 78.03 | 80.90 | 80.71 | 77.40 | 70.94 | 55.40 | 49.87 | a | 61.81 | ||||||||||||
1974 | 41.68 | 46.82 | 56.03 | 61.90 | 74.32 | 86.00 | 80.10 | 77.90 | 73.97 | 63.97 | 54.27 | 43.65 | 63.38 | |||||||||||||
1975 | 44.29 | 43.00 | 48.19 | 52.97 | 67.68 | 80.23 | 80.35 | 81.84 | 73.70 | 68.84 | 57.20 | 49.00 | 62.27 | |||||||||||||
1976 | 47.70 | a | 53.31 | 51.06 | 61.40 | 69.84 | 81.37 | 80.35 | 79.42 | 72.93 | 63.35 | 56.60 | 49.00 | 63.86 | ||||||||||||
1977 | 42.90 | 50.32 | 49.84 | 62.28 | a | 67.74 | 80.00 | 80.29 | 81.45 | 76.27 | 68.58 | 57.73 | 53.06 | 64.21 | ||||||||||||
1978 | 45.13 | 46.04 | 53.94 | 62.27 | 69.10 | 84.93 | 85.34 | b | 80.29 | 76.10 | 70.97 | 52.53 | 43.90 | 64.21 | ||||||||||||
1979 | 39.83 | a | 46.42 | d | 49.19 | 62.87 | 64.87 | 77.80 | 84.77 | 79.06 | 80.43 | 74.87 | 50.77 | 53.20 | a | 63.67 | ||||||||||
1980 | 43.23 | 48.48 | 48.48 | 61.07 | 67.19 | 85.13 | 83.24 | f | 79.03 | 76.70 | 65.90 | 57.90 | 55.90 | 62.64 | a | |||||||||||
1981 | 52.23 | 52.64 | 48.00 | 65.07 | 70.03 | 84.03 | 81.16 | 80.71 | 76.27 | 65.94 | 61.33 | 52.81 | 65.85 | |||||||||||||
1982 | 43.13 | 46.32 | 51.23 | 63.07 | 67.81 | 81.13 | 82.39 | 78.71 | 75.00 | 67.35 | 51.53 | 43.58 | 62.60 | |||||||||||||
1983 | 47.52 | 45.32 | 48.39 | 53.63 | 69.84 | 79.20 | 81.74 | 79.06 | 77.33 | 65.26 | 53.57 | b | 46.03 | 62.24 | ||||||||||||
1984 | 47.55 | 50.55 | 56.68 | 58.20 | 77.06 | 79.30 | 80.23 | a | 76.42 | 75.30 | 58.71 | 56.14 | a | 45.17 | b | 63.44 | ||||||||||
1985 | 42.90 | 44.68 | 50.90 | 62.57 | 71.55 | 83.07 | 82.77 | 81.42 | g | 72.07 | 65.74 | 50.40 | 48.86 | i | 62.66 | b | ||||||||||
1986 | 56.94 | 51.84 | c | 57.36 | c | 62.44 | c | 72.76 | b | 80.50 | 79.25 | o | 79.80 | a | 71.77 | 63.10 | 54.64 | b | 43.72 | b | 63.17 | a | ||||
1987 | 44.06 | 47.75 | d | 48.85 | d | 65.12 | d | 67.76 | b | 80.77 | 81.50 | c | 77.83 | b | 75.28 | e | 70.60 | a | 53.11 | b | 47.50 | m | 64.78 | a | ||
1988 | 45.69 | e | 55.15 | p | 57.45 | b | ----- | z | 67.19 | 76.10 | 78.87 | 72.68 | 69.70 | 66.23 | 51.60 | 43.06 | 62.86 | b | ||||||||
1989 | 40.61 | 47.74 | a | 55.97 | 67.33 | 71.00 | 79.10 | 81.84 | 75.90 | 75.37 | 62.61 | 54.40 | 47.81 | 63.31 | ||||||||||||
1990 | 43.13 | 41.43 | 50.65 | 59.53 | 66.42 | 82.57 | 78.16 | 75.65 | 71.43 | 64.93 | a | 52.03 | 41.10 | 60.59 | ||||||||||||
1991 | 41.74 | 50.46 | 42.87 | 57.87 | 67.13 | a | 72.57 | 79.58 | 75.45 | 70.63 | 65.71 | 48.30 | 41.39 | 59.48 | ||||||||||||
1992 | 40.13 | 44.34 | 48.48 | 63.10 | 64.29 | 73.63 | 77.61 | 74.55 | 72.80 | 65.81 | 45.87 | 40.26 | 59.24 | |||||||||||||
1993 | 41.65 | 41.82 | 51.13 | 59.73 | 68.94 | 77.20 | 79.10 | 75.84 | 72.27 | 61.39 | 48.87 | 44.94 | 60.24 | |||||||||||||
1994 | 47.52 | 41.82 | 51.45 | 57.53 | 66.06 | 81.30 | 82.23 | 78.55 | 71.87 | 59.84 | 47.62 | a | 46.52 | 61.03 | ||||||||||||
1995 | 40.74 | 50.61 | 51.29 | 54.70 | 61.74 | 75.40 | 81.26 | 79.16 | 72.80 | 67.52 | 57.67 | 47.16 | 61.67 | |||||||||||||
1996 | 46.87 | 50.72 | 51.74 | 62.40 | 74.13 | 80.63 | 80.58 | 77.35 | 68.00 | 61.10 | 52.57 | 45.58 | 62.64 | |||||||||||||
1997 | 39.84 | 44.64 | 55.81 | 54.90 | 71.35 | 77.07 | 80.23 | 76.61 | 73.47 | 62.00 | 53.93 | 38.84 | 60.72 | |||||||||||||
1998 | 45.19 | 39.89 | 46.65 | 51.53 | 66.32 | 75.63 | 80.52 | 78.29 | 75.97 | 63.94 | 54.27 | 45.84 | 60.34 | |||||||||||||
1999 | 47.77 | 52.36 | 56.97 | 52.97 | 67.16 | 76.37 | 74.55 | 73.87 | 71.40 | 67.87 | 62.63 | 44.26 | 62.35 | |||||||||||||
2000 | 49.39 | 51.28 | 50.58 | 63.77 | 75.23 | 79.70 | 81.42 | 77.84 | 76.50 | 60.26 | 43.20 | 48.77 | 63.16 | |||||||||||||
2001 | 41.42 | 45.14 | 51.32 | 57.77 | 71.87 | 80.80 | 77.71 | 76.10 | 76.57 | 67.16 | 54.60 | 42.97 | 61.95 | |||||||||||||
2002 | 43.35 | 48.61 | 52.19 | 64.70 | 71.94 | 84.10 | a | 81.55 | 78.52 | 72.37 | 60.94 | 54.07 | 42.45 | 62.90 | ||||||||||||
2003 | 52.16 | 45.46 | 48.03 | 57.97 | 72.00 | 79.40 | 85.42 | 77.32 | 74.00 | 69.35 | 51.53 | 45.71 | 63.20 | |||||||||||||
2004 | 42.87 | 40.59 | 57.84 | 57.33 | 71.16 | 80.03 | 79.29 | 75.84 | 71.77 | 61.23 | 48.40 | 44.29 | 60.89 | |||||||||||||
2005 | 44.74 | 42.71 | 48.00 | 58.97 | 70.45 | 77.23 | 84.23 | 73.65 | 73.00 | 63.74 | 56.03 | 48.68 | 61.79 | |||||||||||||
2006 | 48.00 | 52.21 | 47.06 | 60.67 | 73.16 | 82.20 | 80.52 | 72.48 | 66.97 | 59.87 | 56.40 | 42.97 | 61.88 | |||||||||||||
2007 | 39.45 | 44.82 | 54.68 | 60.33 | 69.74 | 81.10 | 82.52 | 77.29 | 72.70 | 65.06 | 59.77 | 40.20 | a | 62.31 | ||||||||||||
2008 | 39.39 | 45.21 | a | 53.00 | 60.67 | 65.48 | 81.60 | 77.32 | 77.42 | 71.50 | 65.03 | 55.50 | 41.58 | 61.14 | ||||||||||||
2009 | 44.33 | a | 47.26 | a | 54.06 | 58.27 | 71.32 | 73.17 | 82.42 | 79.48 | 72.43 | 62.03 | 58.38 | a | 38.81 | 61.83 | ||||||||||
2010 | 43.39 | 43.00 | 47.94 | 58.30 | 66.19 | 80.27 | 78.23 | 76.35 | 75.80 | 64.42 | 51.17 | 47.74 | 61.07 | |||||||||||||
2011 | 44.32 | 43.07 | 56.81 | 61.77 | 65.45 | 82.37 | 80.39 | 78.84 | 74.30 | 65.23 | 50.50 | 40.42 | 61.95 | |||||||||||||
2012 | 46.45 | 47.17 | 53.26 | 63.33 | 73.06 | 84.63 | 78.87 | 77.39 | 73.63 | 68.16 | 58.23 | 44.10 | 64.02 | |||||||||||||
2013 | 39.48 | 41.29 | 54.97 | 60.10 | 69.45 | 84.67 | 77.23 | 74.55 | 70.73 | 62.06 | 52.93 | 44.26 | 60.98 | |||||||||||||
2014 | 50.42 | 52.29 | 54.81 | 60.43 | 68.06 | 82.43 | 78.55 | 73.58 | 72.30 | 66.45 | 54.37 | 44.84 | 63.21 | |||||||||||||
2015 | 46.06 | 54.96 | 56.55 | 59.77 | 63.42 | 81.47 | 75.87 | 78.68 | 73.70 | 64.13 | 50.73 | 42.13 | 62.29 | |||||||||||||
2016 | 42.23 | 54.03 | 58.03 | 58.80 | 65.94 | 83.63 | 82.13 | 73.81 | 72.23 | 69.06 | 54.87 | 45.45 | 63.35 | |||||||||||||
2017 | 39.06 | 49.75 | 58.65 | 61.83 | 68.03 | 83.80 | 78.10 | 76.19 | 73.27 | 69.39 | 62.70 | 50.19 | 64.25 | |||||||||||||
2018 | 49.29 | 49.39 | 52.39 | 65.37 | 72.81 | 83.67 | 79.39 | 78.32 | 75.67 | 57.97 | 51.97 | 42.74 | 63.25 | |||||||||||||
2019 | 42.03 | 40.46 | 52.68 | 60.40 | 60.61 | 78.87 | 81.52 | 79.61 | 72.03 | 64.19 | 54.60 | 42.58 | 60.80 | |||||||||||||
2020 | 43.71 | 46.93 | 51.13 | 60.73 | 74.03 | 80.87 | 81.58 | 84.52 | 77.07 | 69.90 | 56.27 | 44.52 | 64.27 | |||||||||||||
2021 | 44.77 | 47.04 | 48.84 | 61.50 | 71.61 | 83.57 | 77.45 | 76.52 | 73.43 | 61.13 | 59.13 | 46.77 | 62.65 | |||||||||||||
2022 | 44.68 | 45.64 | 51.16 | 63.03 | 73.13 | 79.30 | 78.77 | 74.52 | 74.90 | 59.71 | 48.33 | 43.71 | 61.41 | |||||||||||||
2023 | 38.68 | 41.64 | 45.39 | 60.47 | 68.58 | 75.87 | 86.13 | 78.84 | 75.00 | 67.87 | 55.27 | 47.06 | 61.73 | |||||||||||||
2024 | 41.10 | 46.38 | 48.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.19 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 44.36 | 46.53 | 51.41 | 60.17 | 69.31 | 79.43 | 80.70 | 77.66 | 73.97 | 65.15 | 53.89 | 45.88 | 62.29 | |||||||||||||
S.D. | 3.80 | 4.20 | 4.39 | 3.64 | 3.44 | 3.16 | 2.30 | 2.50 | 2.58 | 3.51 | 4.04 | 3.76 | 1.35 | |||||||||||||
SKEW | 0.28 | -0.00 | 0.12 | -0.54 | -0.22 | -0.29 | -0.02 | 0.39 | 0.32 | 0.11 | -0.16 | 0.58 | 0.05 | |||||||||||||
MAX | 56.94 | 54.96 | 63.68 | 67.33 | 77.06 | 86.00 | 86.13 | 86.13 | 81.20 | 74.87 | 62.70 | 55.90 | 65.85 | |||||||||||||
MIN | 34.26 | 37.04 | 42.58 | 48.97 | 60.61 | 71.20 | 74.55 | 72.48 | 66.97 | 57.97 | 43.20 | 38.81 | 59.24 | |||||||||||||
YRS | 91 | 89 | 90 | 88 | 90 | 89 | 87 | 87 | 89 | 86 | 89 | 87 | 76 |