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 | 52.00 | d | 60.10 | 62.68 | 62.13 | 57.87 | g | 46.48 | b | 37.70 | 28.13 | 49.89 | e | |||||
1943 | 24.94 | 28.68 | 30.58 | 45.97 | 49.94 | 62.20 | 64.29 | 64.23 | 56.27 | 41.61 | 27.17 | ----- | z | 45.08 | a | |||||||||||
1944 | 26.39 | 28.41 | 26.39 | 34.41 | a | 51.35 | 61.20 | 64.55 | 61.10 | 52.87 | 41.26 | 30.83 | 22.87 | a | 41.80 | |||||||||||
1945 | 21.45 | 26.00 | 31.29 | 33.47 | 49.55 | 55.90 | 62.84 | 63.10 | ----- | z | ----- | z | ----- | z | ----- | z | 42.95 | d | ||||||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | 28.81 | d | 38.10 | a | ----- | z | ----- | z | 60.38 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.46 | j |
1948 | 20.09 | 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 | 63.53 | o | 65.57 | a | 63.97 | 52.55 | j | ----- | z | ----- | z | ----- | z | 64.77 | j | |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.44 | l | 24.87 | a | 24.87 | k |
1953 | 28.19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.19 | 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 | 22.52 | 21.90 | 29.80 | a | 41.30 | 52.81 | 58.33 | 64.47 | a | 62.63 | a | 55.79 | a | 44.03 | 34.72 | a | 27.97 | 43.02 | ||||||||
1965 | 28.42 | 23.61 | 23.97 | 44.53 | 53.16 | 60.48 | a | 64.29 | 61.23 | a | 53.57 | 43.45 | 37.63 | 28.71 | 43.59 | |||||||||||
1966 | 16.94 | 21.18 | 32.42 | 40.83 | 51.23 | 60.87 | 66.23 | 61.23 | 56.20 | 40.55 | 34.07 | 20.45 | 41.85 | |||||||||||||
1967 | 21.07 | a | 22.96 | 35.74 | 46.97 | 47.77 | 60.63 | 62.71 | 59.81 | 53.37 | 42.23 | 33.27 | 22.68 | 42.43 | ||||||||||||
1968 | 25.77 | 24.90 | 33.68 | 39.76 | a | 49.39 | 59.40 | 62.42 | 61.77 | 51.40 | 44.13 | 32.37 | 22.77 | a | 42.31 | |||||||||||
1969 | 25.63 | a | 27.15 | a | 25.81 | 43.13 | 51.48 | 57.60 | 65.48 | 63.61 | 57.13 | 42.42 | 31.60 | e | 26.52 | 43.13 | ||||||||||
1970 | 19.61 | 27.11 | 29.54 | c | 39.86 | b | 50.52 | b | 57.67 | 62.17 | a | 61.45 | 54.23 | 37.42 | 27.93 | 24.50 | a | 41.00 | ||||||||
1971 | 22.13 | a | 22.14 | 26.13 | 38.83 | 48.21 | b | 59.00 | 60.26 | 59.45 | 53.87 | 44.94 | 35.43 | b | 28.94 | 41.61 | ||||||||||
1972 | 23.07 | d | 25.17 | 36.48 | 45.13 | 51.42 | 59.70 | 61.19 | 59.84 | 56.11 | c | 44.27 | a | 27.46 | f | ----- | z | 46.24 | b | |||||||
1973 | 22.29 | 25.36 | 36.71 | c | 37.30 | ----- | z | 58.57 | 61.61 | 59.84 | ----- | z | ----- | z | ----- | z | ----- | z | 43.10 | e | ||||||
1974 | ----- | z | 21.43 | e | 36.42 | g | 40.69 | a | 53.52 | b | 59.07 | a | 63.03 | 59.13 | 49.48 | a | 45.68 | 32.59 | a | 23.39 | 44.80 | b | ||||
1975 | 23.57 | a | 23.54 | 27.35 | 36.72 | a | 48.23 | a | 58.39 | b | 61.16 | 59.48 | 50.37 | 40.30 | a | ----- | z | 22.15 | d | 41.02 | a | |||||
1976 | 17.68 | 28.71 | a | 30.70 | a | 44.85 | c | 46.94 | ----- | z | 60.40 | a | 58.38 | b | 53.93 | a | 32.33 | d | 24.52 | a | 18.93 | c | 37.94 | a | ||
1977 | 15.93 | b | 25.69 | b | 29.28 | b | 43.36 | b | 54.89 | c | 59.25 | b | 61.52 | 62.45 | 54.10 | 42.93 | a | 29.60 | 23.58 | 41.88 | ||||||
1978 | 16.06 | 20.33 | a | 30.28 | b | 43.03 | a | 51.00 | 60.53 | 62.52 | 59.97 | 54.83 | 42.03 | a | 35.87 | 19.40 | a | 41.32 | ||||||||
1979 | 14.83 | a | 21.89 | 31.33 | a | 41.40 | 48.84 | 57.13 | 62.45 | 58.19 | 53.10 | 41.53 | a | 26.86 | a | 22.71 | c | 40.02 | ||||||||
1980 | 22.55 | 23.28 | 27.37 | a | ----- | z | 48.90 | 61.43 | 62.52 | 62.10 | a | 56.17 | a | 39.60 | a | 30.76 | e | 26.73 | a | 41.95 | a | |||||
1981 | 23.96 | d | 23.39 | ----- | z | 45.07 | a | 49.52 | 59.75 | b | 63.03 | 58.79 | q | 54.43 | 44.84 | 33.97 | 25.23 | a | 42.32 | b | ||||||
1982 | 20.26 | 19.56 | a | 30.50 | a | 39.39 | b | 50.40 | a | 56.86 | a | 63.58 | 61.97 | 54.43 | 38.21 | b | 29.82 | b | 23.58 | 40.71 | ||||||
1983 | 17.37 | a | 25.27 | b | 29.86 | c | 33.00 | b | 44.38 | b | 54.90 | a | 63.07 | d | 62.04 | g | 54.81 | c | 46.52 | d | 33.56 | c | 14.83 | a | 37.96 | a |
1984 | 18.76 | b | 22.14 | a | 28.53 | l | 36.90 | a | 49.46 | c | 59.29 | b | 59.70 | a | 59.22 | h | 47.43 | b | 40.20 | f | 30.18 | b | 25.64 | c | 38.83 | c |
1985 | 18.74 | h | 23.54 | d | 36.19 | e | 44.88 | d | 52.90 | j | 59.43 | g | 61.54 | e | 62.67 | j | 53.95 | h | 44.91 | h | 29.31 | n | 20.69 | r | 41.54 | h |
1986 | ----- | z | ----- | z | ----- | z | 45.54 | b | 50.83 | b | 61.66 | a | 65.23 | 62.45 | 57.03 | a | 44.65 | 30.80 | 26.84 | 49.45 | c | |||||
1987 | 22.35 | 30.07 | 29.19 | 37.57 | 52.42 | 59.77 | 63.77 | a | 62.45 | 54.41 | a | 43.35 | 31.43 | 22.65 | 42.45 | |||||||||||
1988 | 20.81 | 23.45 | 28.74 | 38.53 | 50.03 | 59.80 | 63.70 | a | 63.63 | a | 54.13 | 44.16 | 31.55 | a | 23.77 | 41.86 | ||||||||||
1989 | 25.13 | 24.00 | 33.03 | 43.97 | 53.77 | 57.69 | a | 62.57 | a | 62.58 | 51.87 | 42.48 | 28.83 | 17.23 | 41.93 | |||||||||||
1990 | 23.60 | a | 27.04 | 34.61 | 42.87 | 48.63 | a | 64.10 | 63.23 | 60.80 | a | 57.47 | 41.48 | 35.24 | a | 19.70 | a | 43.23 | ||||||||
1991 | 22.61 | 27.79 | 34.10 | 42.17 | a | 53.55 | 60.83 | 63.03 | 61.92 | f | 54.90 | a | 42.19 | 28.67 | 28.27 | a | 41.65 | a | ||||||||
1992 | 25.19 | 30.21 | 33.57 | a | 44.20 | 51.57 | c | 57.10 | a | 63.30 | a | 60.92 | e | 53.69 | a | 42.82 | c | 29.81 | c | 24.58 | 43.08 | |||||
1993 | 23.87 | 24.07 | 31.48 | 39.40 | 50.74 | 61.47 | k | 66.39 | 62.26 | 51.77 | 40.29 | 26.20 | 25.05 | i | 41.65 | b | ||||||||||
1994 | 21.03 | a | 20.79 | 34.13 | a | 39.63 | 53.58 | 63.75 | f | 63.61 | 61.71 | 53.87 | 43.90 | 34.03 | 27.44 | f | 42.63 | b | ||||||||
1995 | 25.55 | 28.89 | 32.65 | 39.87 | 49.73 | a | 59.30 | 63.09 | i | 63.61 | 55.57 | 41.43 | a | 31.77 | 26.48 | f | 42.84 | b | ||||||||
1996 | 19.81 | 26.48 | 27.10 | 39.40 | 56.32 | 61.60 | e | 65.26 | 63.42 | 54.48 | c | 42.48 | 32.17 | 24.09 | h | 44.41 | a | |||||||||
1997 | 22.45 | b | 26.81 | a | 32.29 | 37.79 | a | 51.07 | b | 58.93 | 64.63 | d | 63.21 | b | 58.21 | a | 44.32 | 31.56 | c | 24.26 | 42.96 | |||||
1998 | 26.58 | 30.18 | 29.93 | a | 39.57 | b | 54.83 | b | 60.27 | 66.77 | 62.71 | 59.27 | 49.58 | 36.50 | 24.96 | e | 45.10 | |||||||||
1999 | 26.65 | 29.75 | 34.10 | 41.30 | g | 50.68 | 60.79 | b | 65.10 | 64.81 | 55.07 | 42.06 | 35.23 | 25.52 | 44.52 | a | ||||||||||
2000 | 25.42 | 29.93 | 34.71 | 42.11 | b | 53.89 | c | 61.91 | g | 65.40 | f | 64.39 | 55.73 | 48.48 | 29.00 | d | 21.03 | 40.47 | b | |||||||
2001 | 24.94 | 29.00 | a | 33.04 | c | 45.21 | a | 52.77 | 63.20 | e | 67.58 | 64.23 | 55.57 | b | 42.52 | 38.44 | c | 26.19 | 45.22 | |||||||
2002 | 25.19 | 23.93 | 27.03 | 44.36 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.13 | h | |||
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.10 | 59.65 | 54.37 | 46.23 | 34.33 | 24.29 | 46.99 | f | ||||||
2005 | 27.39 | 30.46 | 31.32 | 41.07 | 52.61 | 61.40 | 62.68 | 62.35 | 57.18 | b | 44.87 | 31.00 | 21.07 | b | 43.62 | |||||||||||
2006 | 25.16 | 23.36 | 35.87 | h | 44.57 | 54.77 | a | 62.14 | a | 65.14 | c | 64.13 | a | 53.00 | 43.52 | d | 33.68 | b | 25.19 | 44.97 | a | |||||
2007 | 20.30 | d | 25.21 | 38.42 | 38.21 | f | 51.32 | f | 58.87 | 62.54 | c | 64.00 | j | 58.11 | l | 44.04 | f | 31.35 | j | 25.94 | m | 41.07 | g | |||
2008 | 20.43 | j | 26.37 | j | 30.65 | k | 37.50 | f | 51.90 | k | 60.91 | h | 63.32 | i | 62.00 | i | 53.09 | g | 42.04 | h | 31.11 | l | 24.55 | k | ----- | z |
2009 | 20.72 | m | 30.53 | k | 31.83 | g | 41.09 | g | 51.10 | 61.20 | 62.84 | 62.13 | 52.53 | 39.97 | 32.17 | 19.81 | 47.72 | d | ||||||||
2010 | 21.40 | a | 23.71 | 31.81 | 41.80 | 50.06 | 63.77 | 63.87 | 63.00 | 57.70 | 44.29 | 29.83 | 26.52 | 43.15 | ||||||||||||
2011 | 19.87 | 20.61 | 34.61 | 43.13 | 50.06 | 64.20 | 68.03 | 67.52 | 54.73 | 44.03 | 32.57 | 26.13 | 43.79 | |||||||||||||
2012 | 25.32 | 27.38 | 37.74 | 46.90 | 54.58 | 63.90 | 65.48 | 64.35 | 56.23 | 42.97 | 35.50 | 25.61 | 45.50 | |||||||||||||
2013 | 24.16 | 26.14 | 32.58 | 36.77 | 51.39 | 63.33 | 63.45 | 63.65 | 58.93 | 42.97 | 30.70 | 22.32 | 43.03 | |||||||||||||
2014 | 19.19 | 24.18 | 28.84 | 39.03 | 50.65 | 62.50 | 64.29 | 63.42 | 59.00 | 44.87 | 28.37 | 27.55 | 42.66 | |||||||||||||
2015 | 24.45 | 26.00 | 34.10 | 42.93 | 50.29 | 62.40 | 65.29 | 63.39 | 60.50 | 49.26 | 33.37 | 27.77 | 44.98 | |||||||||||||
2016 | 25.23 | 29.62 | 37.32 | 42.93 | 50.52 | 63.27 | 67.32 | 63.45 | 58.60 | 47.68 | 39.40 | 24.65 | 45.83 | |||||||||||||
2017 | 27.61 | 31.50 | 38.16 | 45.07 | 50.97 | 63.27 | 66.65 | 63.65 | 57.67 | 46.10 | 36.87 | 25.48 | 46.08 | |||||||||||||
2018 | 20.87 | a | 26.64 | 37.03 | 39.70 | 58.61 | 64.43 | 67.32 | 64.68 | 58.57 | 46.97 | 31.17 | 27.71 | 45.31 | ||||||||||||
2019 | 26.19 | 26.25 | 33.03 | 43.57 | 52.42 | 60.87 | 66.39 | 67.68 | 63.23 | 41.32 | 31.23 | 29.81 | 45.17 | |||||||||||||
2020 | 28.68 | 25.97 | 40.06 | 41.77 | 54.16 | 63.57 | 69.00 | 66.48 | 53.70 | 41.87 | 37.83 | 26.13 | 45.77 | |||||||||||||
2021 | 26.74 | 20.21 | 34.74 | 42.03 | 53.16 | 64.47 | 66.00 | 65.55 | 59.63 | 48.00 | 35.23 | 32.26 | 45.67 | |||||||||||||
2022 | 21.19 | 20.07 | 29.71 | 42.57 | 53.58 | 64.70 | 69.97 | 66.61 | 60.17 | 47.52 | 31.97 | 26.90 | 44.58 | |||||||||||||
2023 | 27.35 | 27.50 | 33.61 | 39.67 | 54.45 | 61.77 | 66.58 | 66.97 | 61.47 | 47.19 | 35.87 | 29.65 | 46.01 | |||||||||||||
2024 | 22.39 | 31.07 | 35.87 | 43.28 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.78 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.00 | 25.45 | 32.12 | 41.31 | 51.45 | 60.61 | 64.09 | 62.66 | 55.43 | 43.44 | 32.41 | 24.58 | 43.38 | |||||||||||||
S.D. | 3.37 | 3.18 | 3.62 | 3.28 | 2.45 | 2.36 | 2.17 | 2.20 | 2.96 | 3.05 | 3.28 | 3.37 | 1.69 | |||||||||||||
SKEW | -0.46 | 0.03 | -0.02 | -0.47 | 0.10 | -0.14 | 0.44 | 0.16 | 0.11 | -0.62 | -0.02 | -0.48 | 0.08 | |||||||||||||
MAX | 28.68 | 31.50 | 40.06 | 46.97 | 58.61 | 64.70 | 69.97 | 67.68 | 63.23 | 49.58 | 39.40 | 32.26 | 46.08 | |||||||||||||
MIN | 14.83 | 19.56 | 23.97 | 33.00 | 44.38 | 54.90 | 59.70 | 58.19 | 47.43 | 32.33 | 24.52 | 14.83 | 40.02 | |||||||||||||
YRS | 58 | 59 | 56 | 57 | 57 | 55 | 60 | 56 | 56 | 56 | 55 | 52 | 36 |