YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | 66.98 | d | 74.72 | 76.24 | 74.55 | 68.98 | g | 58.75 | c | 53.97 | 44.11 | 64.19 | e | |||||
1943 | 40.50 | 45.43 | 48.27 | 63.22 | 64.84 | 75.92 | 76.95 | 80.65 | 71.22 | 58.21 | 44.31 | a | ----- | z | 60.86 | a | ||||||||||
1944 | 39.50 | 42.29 | 42.69 | b | 51.74 | a | 66.63 | a | 75.93 | 77.81 | 76.85 | 67.33 | 59.16 | 47.02 | 36.12 | a | 56.92 | |||||||||
1945 | 37.26 | 42.29 | 49.69 | 51.43 | 68.89 | 74.15 | 77.55 | 77.32 | ----- | z | ----- | z | ----- | z | ----- | z | 59.82 | d | ||||||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | 43.46 | d | 54.02 | a | ----- | z | ----- | z | 76.31 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.74 | j |
1948 | 36.24 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.50 | q | 81.15 | a | 80.24 | 71.53 | j | ----- | z | ----- | z | ----- | z | 80.70 | j | |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.31 | l | 41.00 | l | ----- | z |
1953 | 44.73 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.73 | k | |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | 39.26 | 35.41 | 48.17 | a | 58.80 | 68.44 | 74.03 | 79.13 | a | 76.22 | a | 67.86 | a | 60.48 | 48.59 | a | 42.10 | 58.21 | ||||||||
1965 | 44.45 | 40.18 | 39.53 | 59.95 | 67.23 | 73.02 | b | 78.06 | 74.40 | a | 68.43 | 58.97 | 53.28 | 42.89 | 58.37 | |||||||||||
1966 | 30.58 | 36.21 | 49.89 | 55.55 | 65.18 | 73.28 | 80.06 | 72.13 | 67.88 | 56.11 | 50.60 | 36.81 | 56.19 | |||||||||||||
1967 | 38.72 | a | 39.79 | 53.26 | 62.25 | 64.19 | 73.27 | 74.60 | 72.97 | 66.37 | 59.60 | 47.92 | 36.15 | 57.42 | ||||||||||||
1968 | 38.79 | 38.66 | 47.47 | 54.53 | a | 63.81 | 73.98 | 74.76 | 74.39 | 66.62 | 60.40 | 45.33 | 38.87 | a | 56.47 | |||||||||||
1969 | 41.87 | a | 40.76 | a | 38.87 | 58.30 | 65.74 | 72.28 | 80.10 | 77.45 | 67.97 | 54.05 | 47.32 | e | 41.32 | 57.17 | ||||||||||
1970 | 34.73 | 43.32 | 44.04 | c | 56.31 | d | 67.33 | b | 73.10 | 77.12 | a | 76.63 | 68.13 | 54.06 | 45.73 | 42.78 | a | 56.94 | ||||||||
1971 | 38.87 | a | 37.63 | a | 46.32 | 55.68 | 64.81 | b | 74.83 | 75.79 | 71.06 | 67.70 | 58.95 | 49.54 | b | 40.71 | 56.82 | |||||||||
1972 | 40.67 | d | 43.93 | 55.13 | 62.37 | 65.15 | 74.37 | 74.76 | 72.68 | 69.48 | c | 59.40 | a | 37.48 | f | ----- | z | 61.79 | b | |||||||
1973 | 33.89 | 40.07 | 50.30 | c | 51.33 | ----- | z | 74.58 | 76.97 | 76.02 | ----- | z | ----- | z | ----- | z | ----- | z | 57.59 | e | ||||||
1974 | ----- | z | 40.61 | f | 53.60 | g | 57.84 | a | 69.29 | b | 74.26 | a | 76.98 | 71.02 | 60.26 | a | 57.68 | 46.09 | a | 36.77 | 61.13 | c | ||||
1975 | 37.53 | a | 36.52 | 44.39 | 53.67 | a | 63.87 | a | 73.86 | b | 72.56 | 73.19 | 64.03 | 58.40 | a | ----- | z | 39.80 | d | 56.17 | a | |||||
1976 | 36.29 | 47.59 | b | 48.21 | b | 59.72 | e | 61.79 | ----- | z | 71.23 | a | 73.38 | b | 66.55 | a | 48.96 | e | 39.57 | a | 37.29 | c | 53.69 | a | ||
1977 | 31.29 | b | 42.56 | b | 47.12 | b | 56.57 | b | 67.71 | c | 75.57 | b | 75.66 | 75.45 | 71.53 | 59.58 | a | 47.62 | 40.94 | 57.63 | ||||||
1978 | 30.02 | a | 30.87 | a | 47.45 | b | 62.52 | b | 66.44 | 75.45 | 78.32 | 73.26 | 67.55 | 58.18 | a | 46.12 | 34.53 | a | 55.89 | |||||||
1979 | 27.05 | a | 38.05 | 46.78 | a | 56.93 | 63.52 | 71.50 | 76.47 | 71.27 | 68.35 | 60.29 | b | 41.97 | a | 37.22 | d | 54.95 | ||||||||
1980 | 37.00 | 39.66 | 45.28 | a | ----- | z | 64.07 | a | 78.18 | 78.50 | 75.47 | a | 69.38 | a | 55.95 | a | 45.68 | e | 42.05 | a | 57.38 | a | ||||
1981 | 38.88 | f | 41.64 | ----- | z | 60.33 | a | 64.98 | 75.11 | b | 76.26 | 71.68 | q | 67.50 | 57.27 | 49.60 | 40.58 | a | 59.25 | c | ||||||
1982 | 36.61 | 35.48 | a | 47.25 | a | 54.41 | b | 64.73 | a | 69.69 | a | 76.98 | 76.06 | 70.15 | 55.52 | b | 44.36 | b | 35.65 | 55.57 | ||||||
1983 | 30.70 | a | 37.98 | c | 45.61 | c | 49.29 | b | 61.53 | b | 69.29 | a | 77.59 | d | 77.50 | g | 71.02 | c | 59.52 | d | 47.54 | c | 28.27 | a | 52.58 | a |
1984 | 34.40 | b | 41.02 | b | 44.32 | l | 53.05 | a | 66.11 | c | 73.00 | b | 74.48 | a | 74.25 | i | 63.61 | c | 54.94 | f | 44.41 | b | 39.46 | c | 54.39 | c |
1985 | 32.78 | h | 36.67 | d | 50.04 | e | 60.44 | d | 67.93 | j | 71.89 | h | 75.71 | e | 75.93 | j | 67.18 | h | 57.67 | h | 44.41 | n | 34.17 | s | 55.71 | h |
1986 | ----- | z | ----- | z | ----- | z | 60.73 | b | 65.26 | b | 72.48 | a | 78.63 | 74.31 | 68.14 | a | 55.39 | 43.53 | 37.60 | 61.78 | c | |||||
1987 | 35.34 | 41.41 | 43.79 | 54.58 | 65.15 | 73.00 | 76.97 | a | 74.63 | 66.73 | b | 58.40 | 46.48 | 35.32 | 55.98 | |||||||||||
1988 | 32.81 | 39.60 | 45.81 | 54.50 | 64.53 | 73.15 | 75.08 | a | 76.13 | a | 67.57 | 58.69 | 48.16 | a | 38.18 | 56.18 | ||||||||||
1989 | 41.63 | 36.11 | 50.95 | 60.17 | 68.74 | 69.50 | a | 76.33 | a | 74.74 | 65.52 | 59.50 | 47.93 | 32.40 | 56.96 | |||||||||||
1990 | 39.38 | a | 43.02 | 46.95 | 56.63 | 63.85 | a | 80.40 | 75.48 | 74.07 | a | 70.02 | 57.23 | 49.93 | a | 35.32 | a | 57.69 | ||||||||
1991 | 33.55 | 44.29 | 49.69 | 59.09 | a | 69.16 | 74.70 | 75.65 | 74.66 | f | 65.62 | a | 59.16 | 41.87 | 39.27 | a | 55.64 | a | ||||||||
1992 | 36.19 | 44.72 | 50.33 | a | 58.30 | 64.39 | c | 70.12 | a | 76.23 | a | 73.67 | e | 68.14 | a | 60.48 | c | 44.22 | c | 37.76 | 57.05 | |||||
1993 | 35.42 | 39.04 | 47.84 | 56.45 | 65.42 | 75.34 | k | 78.31 | 75.94 | 67.70 | 56.10 | 41.90 | 41.89 | i | 56.41 | b | ||||||||||
1994 | 37.47 | a | 38.88 | 50.03 | a | 56.42 | 65.47 | 79.12 | f | 77.76 | 75.35 | 69.78 | 58.79 | 48.27 | 42.76 | f | 57.82 | b | ||||||||
1995 | 39.60 | 45.23 | 47.89 | 55.75 | 63.40 | a | 73.28 | 77.91 | i | 76.68 | 67.53 | 59.18 | a | 48.92 | 41.40 | f | 57.75 | b | ||||||||
1996 | 37.82 | 43.95 | 45.00 | 57.12 | 72.81 | 75.02 | e | 77.35 | 74.98 | 67.26 | c | 58.35 | 47.68 | 41.00 | h | 59.76 | a | |||||||||
1997 | 34.84 | c | 38.44 | a | 50.63 | 51.52 | a | 64.26 | b | 71.95 | 78.73 | e | 75.97 | b | 71.86 | a | 58.61 | 46.59 | c | 36.03 | 56.62 | |||||
1998 | 41.82 | 42.86 | 44.95 | a | 55.36 | b | 71.38 | b | 77.60 | 80.97 | 74.98 | 73.90 | 62.10 | 50.02 | 38.67 | e | 59.55 | |||||||||
1999 | 41.87 | 46.68 | 47.18 | 55.89 | g | 63.53 | 73.41 | b | 77.34 | 77.90 | 67.13 | 58.24 | 52.92 | 38.89 | 58.64 | a | ||||||||||
2000 | 41.74 | 48.02 | 50.84 | 57.68 | b | 69.95 | c | 73.96 | g | 78.94 | f | 77.90 | 71.73 | 59.98 | 41.42 | e | 34.15 | 55.34 | b | |||||||
2001 | 34.95 | 42.81 | a | 44.75 | c | 61.16 | a | 66.65 | 76.54 | e | 81.06 | 76.44 | 69.38 | b | 58.81 | 50.79 | d | 40.68 | 58.67 | |||||||
2002 | 39.77 | 39.34 | 44.81 | 58.73 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.66 | h | |||
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.10 | 73.95 | 68.37 | 59.42 | 44.37 | 39.94 | 60.36 | f | ||||||
2005 | 41.55 | 43.52 | 47.15 | 57.15 | 65.48 | 75.98 | 76.47 | 74.65 | 72.38 | b | 58.98 | 49.73 | 38.09 | b | 58.43 | |||||||||||
2006 | 43.73 | 41.91 | 51.22 | h | 61.80 | 70.38 | a | 77.12 | b | 79.29 | c | 76.02 | a | 65.17 | 56.87 | d | 48.80 | b | 38.13 | 59.93 | a | |||||
2007 | 30.78 | d | 40.52 | 52.00 | 52.44 | f | 62.84 | f | 71.38 | 74.71 | c | 76.36 | j | 70.08 | l | 61.20 | f | 49.55 | k | 39.42 | m | 53.88 | g | |||
2008 | 36.48 | j | 44.05 | j | 48.67 | k | 54.85 | f | 66.58 | k | 76.45 | h | 74.66 | i | 74.36 | i | 65.63 | g | 56.36 | i | 49.58 | l | 39.62 | k | ----- | z |
2009 | 37.56 | n | 47.82 | k | 50.04 | g | 57.65 | g | 65.31 | 74.58 | 76.48 | a | 76.10 | 66.40 | 54.61 | 49.42 | 32.84 | 61.97 | d | |||||||
2010 | 37.13 | a | 34.89 | 46.68 | 56.70 | 64.21 | 77.53 | 74.50 | 76.53 | 72.02 | 59.98 | 46.72 | 42.03 | 57.41 | ||||||||||||
2011 | 36.74 | 37.23 | 52.19 | 61.22 | 66.50 | 80.52 | 81.58 | 82.05 | 69.48 | 59.23 | 47.60 | 35.05 | 59.12 | |||||||||||||
2012 | 42.08 | 40.84 | 54.45 | 63.23 | 68.97 | 77.37 | 78.44 | 77.66 | 69.48 | 57.58 | 51.97 | 40.76 | 60.24 | |||||||||||||
2013 | 37.60 | 40.11 | 48.92 | 54.33 | 66.65 | 76.65 | 75.03 | 76.15 | 71.85 | 58.15 | 44.30 | 36.29 | 57.17 | |||||||||||||
2014 | 36.37 | 39.04 | 46.35 | 56.23 | 65.47 | 74.75 | 75.35 | 75.74 | 68.28 | 60.27 | 42.90 | 39.90 | 56.72 | |||||||||||||
2015 | 35.87 | 41.09 | 48.16 | 57.88 | 61.94 | 73.92 | 77.13 | 76.27 | 73.57 | 60.82 | 47.73 | 41.40 | 57.98 | |||||||||||||
2016 | 38.44 | 45.72 | 53.32 | 57.52 | 63.65 | 75.57 | 81.00 | 75.03 | 69.52 | 62.90 | 52.72 | 38.26 | 59.47 | |||||||||||||
2017 | 40.02 | 47.86 | 54.77 | 59.18 | 65.87 | 77.12 | 79.10 | 73.79 | 69.78 | 59.76 | 52.40 | 40.39 | 60.00 | |||||||||||||
2018 | 37.12 | a | 42.82 | 52.97 | 56.08 | 73.90 | 79.25 | 80.13 | 77.42 | 70.32 | 57.48 | 44.23 | 39.90 | 59.30 | ||||||||||||
2019 | 40.11 | 42.36 | 46.69 | 58.65 | 64.39 | 73.72 | 79.26 | 81.45 | 74.98 | 54.58 | 44.78 | 43.44 | 58.70 | |||||||||||||
2020 | 42.50 | 39.38 | 53.00 | 57.23 | 69.74 | 77.48 | 82.65 | 80.65 | 67.78 | 57.73 | 52.65 | 40.77 | 60.13 | |||||||||||||
2021 | 38.53 | 34.23 | 50.31 | 56.02 | 65.68 | 76.67 | 76.76 | 76.98 | 74.02 | 63.03 | 51.15 | 48.71 | 59.34 | |||||||||||||
2022 | 37.00 | 36.48 | 47.95 | 59.72 | 70.56 | 78.13 | 83.58 | 77.85 | 72.82 | 58.89 | 44.63 | 39.87 | 58.96 | |||||||||||||
2023 | 41.76 | 42.36 | 49.71 | 55.90 | 67.06 | 74.82 | 79.87 | 80.79 | 74.75 | 60.77 | 49.62 | 43.24 | 60.05 | |||||||||||||
2024 | 35.40 | 46.00 | 50.55 | 58.00 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.49 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.57 | 40.77 | 48.14 | 57.26 | 66.19 | 74.67 | 77.42 | 75.81 | 68.89 | 58.39 | 47.33 | 38.78 | 57.79 | |||||||||||||
S.D. | 3.82 | 3.67 | 3.48 | 3.18 | 2.64 | 2.51 | 2.38 | 2.48 | 2.85 | 2.34 | 3.36 | 3.46 | 1.43 | |||||||||||||
SKEW | -0.45 | -0.13 | -0.21 | -0.18 | 0.81 | 0.07 | 0.24 | 0.48 | -0.06 | -1.24 | -0.04 | -0.20 | 0.10 | |||||||||||||
MAX | 44.73 | 48.02 | 55.13 | 63.23 | 73.90 | 80.52 | 83.58 | 82.05 | 74.98 | 63.03 | 53.97 | 48.71 | 60.24 | |||||||||||||
MIN | 27.05 | 30.87 | 38.87 | 49.29 | 61.53 | 69.29 | 71.23 | 71.02 | 60.26 | 48.96 | 39.57 | 28.27 | 54.95 | |||||||||||||
YRS | 57 | 58 | 56 | 58 | 57 | 55 | 60 | 56 | 56 | 56 | 55 | 51 | 36 |