YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | 30.58 | 31.55 | 33.87 | 43.57 | 55.71 | 54.07 | 66.55 | 68.45 | 58.50 | 46.61 | 33.43 | 31.26 | 46.18 | |||||||||||||
1953 | 33.23 | 31.32 | 34.52 | 38.47 | 43.61 | 52.30 | 71.07 | a | 63.64 | c | 57.62 | f | 45.55 | 37.43 | 29.58 | 43.70 | a | |||||||||
1954 | 33.61 | 36.57 | 35.00 | 43.10 | 52.48 | 56.70 | 71.39 | 63.42 | 56.97 | 47.87 | 42.63 | 33.00 | 47.73 | |||||||||||||
1955 | 32.48 | 29.71 | 36.71 | 41.13 | 48.65 | 54.77 | 62.10 | 69.45 | 56.40 | 53.00 | 38.93 | 32.26 | 46.30 | |||||||||||||
1956 | 33.87 | 31.07 | 39.06 | 44.13 | 53.10 | 59.10 | 67.52 | 61.65 | 61.27 | 47.39 | 37.33 | 35.13 | 47.55 | |||||||||||||
1957 | 37.03 | 41.64 | 40.00 | 43.97 | 46.48 | 64.43 | 70.61 | 67.71 | 57.00 | 49.32 | 36.41 | a | 33.42 | 49.00 | ||||||||||||
1958 | 34.58 | 37.93 | 37.32 | 42.07 | 57.29 | 61.37 | 66.94 | 70.97 | 64.23 | 55.10 | 47.27 | d | 35.26 | 50.86 | ||||||||||||
1959 | 33.71 | 35.61 | 40.74 | 48.23 | 52.77 | 65.07 | 72.97 | 68.58 | 55.63 | 48.61 | 39.70 | 35.68 | 49.78 | |||||||||||||
1960 | 27.94 | 30.72 | 41.45 | 45.50 | 50.06 | 63.03 | 68.26 | 69.23 | 63.43 | 51.16 | 39.17 | 32.68 | 48.55 | |||||||||||||
1961 | 34.94 | 36.21 | 37.87 | 46.27 | 51.19 | 63.37 | 71.03 | 71.03 | 58.45 | a | 47.42 | 39.53 | 35.87 | 49.43 | ||||||||||||
1962 | 33.90 | 38.36 | 34.97 | 49.07 | 48.16 | 59.03 | 67.10 | 67.93 | d | 64.17 | 50.55 | 42.83 | 37.87 | 49.49 | ||||||||||||
1963 | 30.71 | 40.93 | 38.26 | 43.63 | 54.87 | 58.30 | 69.23 | 71.13 | 64.07 | 53.32 | 43.13 | 32.48 | 50.01 | |||||||||||||
1964 | 28.32 | 30.21 | 36.13 | 45.07 | 49.84 | 59.07 | 70.58 | 68.19 | 59.57 | 53.10 | 35.97 | 34.35 | 47.53 | |||||||||||||
1965 | 37.03 | 34.57 | 37.03 | 45.33 | 49.26 | 55.93 | 69.13 | 66.03 | 57.73 | 51.26 | 44.60 | 37.10 | 48.75 | |||||||||||||
1966 | 31.16 | 33.43 | 39.97 | 45.00 | 55.03 | 60.13 | 69.35 | 71.35 | 63.83 | 49.29 | 41.10 | 35.39 | 49.59 | |||||||||||||
1967 | 34.42 | 36.21 | 41.19 | 40.53 | 53.23 | 59.63 | 72.71 | 69.63 | a | 63.63 | 50.39 | 42.77 | 32.71 | 49.75 | ||||||||||||
1968 | 34.35 | 42.14 | 41.94 | 44.33 | 52.42 | 59.73 | 66.97 | 65.32 | 59.73 | 50.81 | 42.87 | 30.23 | 49.24 | |||||||||||||
1969 | 40.03 | a | 35.18 | 37.77 | 42.70 | 54.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.10 | g | ||||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | 52.26 | 59.80 | 71.13 | 64.89 | d | 63.17 | 47.35 | 38.30 | 35.26 | 54.02 | d | |||||||
1976 | 32.90 | 38.69 | 38.45 | 41.20 | 53.42 | 58.66 | a | 71.35 | 63.00 | 61.00 | 48.10 | 38.83 | 29.65 | 47.94 | ||||||||||||
1977 | 32.94 | 35.14 | 32.65 | 44.07 | 48.29 | 62.23 | 69.52 | 71.10 | a | 59.57 | 52.77 | 40.37 | 38.32 | 48.91 | ||||||||||||
1978 | 36.39 | 37.89 | 44.84 | 42.60 | 50.68 | 57.90 | 68.45 | 65.74 | 61.10 | 53.97 | 40.83 | 30.71 | 49.26 | |||||||||||||
1979 | 30.31 | b | 31.64 | 38.81 | 39.63 | 50.68 | 57.90 | 65.16 | 62.65 | 60.37 | 48.35 | 35.33 | 33.58 | 46.20 | ||||||||||||
1980 | 39.35 | 40.24 | 37.97 | 42.13 | 48.00 | 53.30 | 68.13 | 66.52 | 58.73 | 45.61 | 36.93 | 36.32 | 47.77 | |||||||||||||
1981 | 34.77 | 34.82 | 37.90 | 46.60 | 53.58 | 65.00 | 72.61 | 69.65 | 62.27 | 45.94 | 39.07 | 34.29 | 49.71 | |||||||||||||
1982 | 31.33 | a | 37.64 | 38.97 | 42.13 | 50.87 | 55.37 | 66.77 | 69.77 | 59.90 | 44.74 | 40.07 | a | 32.80 | a | 47.53 | ||||||||||
1983 | 32.83 | a | 37.22 | a | 40.00 | 39.10 | 48.90 | 56.41 | a | 66.23 | 67.20 | a | 64.43 | 50.00 | 38.79 | a | 33.58 | e | 47.89 | |||||||
1984 | 33.55 | 32.03 | 37.71 | 40.63 | 54.65 | 59.07 | 71.83 | a | 68.23 | 60.55 | a | 43.58 | 35.03 | 33.87 | 47.56 | |||||||||||
1985 | 32.77 | 31.71 | 37.17 | a | 43.77 | 50.73 | a | 59.43 | 69.90 | 65.23 | 54.13 | 49.03 | 37.62 | a | 32.94 | 47.04 | ||||||||||
1986 | 36.72 | b | 37.62 | b | 41.19 | e | 43.81 | c | 50.10 | 61.97 | 67.13 | 70.48 | 53.43 | 45.73 | a | 39.17 | 32.47 | a | 48.32 | |||||||
1987 | 29.77 | 35.18 | 34.26 | 46.17 | 53.10 | 60.03 | 63.13 | 67.19 | 57.80 | 53.54 | g | 36.63 | k | 29.93 | b | 47.66 | b | |||||||||
1988 | 32.58 | 36.36 | a | 34.77 | a | 43.90 | a | 51.48 | b | 62.14 | a | 70.60 | a | 66.74 | 56.13 | 52.61 | 37.14 | a | 31.10 | 47.96 | ||||||
1989 | 31.33 | a | 33.93 | 40.06 | 48.50 | 53.58 | 60.07 | 70.58 | 66.19 | 58.59 | a | 48.71 | 39.60 | 30.37 | a | 48.46 | ||||||||||
1990 | 30.80 | a | 33.30 | a | 39.81 | 46.83 | a | 49.74 | 62.57 | 70.93 | a | 65.40 | a | 61.90 | a | 49.07 | b | 39.24 | a | 26.32 | 47.99 | |||||
1991 | 32.71 | 37.57 | 37.47 | a | 41.17 | a | 48.42 | 55.86 | b | 67.58 | 67.58 | 62.13 | 51.23 | a | 39.47 | 34.10 | 47.94 | |||||||||
1992 | 33.65 | 40.33 | b | 41.65 | 45.97 | 54.65 | 57.24 | a | 64.97 | 69.60 | a | 58.96 | b | 49.70 | a | 35.17 | a | 29.76 | b | 48.47 | ||||||
1993 | 35.52 | 36.32 | 39.83 | b | 42.55 | a | 52.10 | a | 56.19 | c | 59.69 | b | 64.76 | b | 56.30 | 49.28 | b | 32.93 | a | 28.40 | a | 46.15 | ||||
1994 | 30.84 | 30.85 | a | ----- | z | 46.10 | 50.68 | c | 61.43 | b | 68.13 | a | 70.71 | 61.79 | a | 45.48 | 32.03 | 32.06 | 48.19 | a | ||||||
1995 | 35.73 | a | 38.93 | 38.33 | a | 40.10 | 45.87 | 56.85 | c | 65.00 | c | 68.06 | 62.57 | b | 47.97 | 41.93 | 32.90 | a | 47.85 | |||||||
1996 | 29.24 | b | 37.62 | 37.97 | b | 43.81 | c | 50.45 | b | 59.13 | 70.76 | b | 69.71 | 60.78 | c | 47.07 | b | 39.82 | b | 32.79 | c | 48.26 | ||||
1997 | 36.30 | a | 34.50 | 39.30 | a | 44.15 | c | 57.77 | 58.90 | a | 65.33 | a | 69.93 | b | 67.23 | 47.90 | 39.10 | 31.70 | a | 49.34 | ||||||
1998 | 33.66 | b | ----- | z | ----- | z | 39.62 | a | 46.58 | 55.13 | 69.55 | b | 68.87 | 60.28 | a | 45.33 | a | 37.25 | b | 32.10 | a | 48.84 | b | |||
1999 | 33.08 | f | 34.93 | a | 35.20 | f | 39.93 | 46.60 | f | 58.34 | a | 69.17 | g | 66.09 | i | 61.70 | j | 48.95 | l | 40.00 | j | 31.60 | k | 44.40 | i | |
2000 | 32.32 | l | 37.11 | k | 39.87 | h | 44.68 | k | 55.50 | o | 64.78 | l | 66.11 | m | 70.87 | h | 61.32 | k | 49.50 | k | 32.89 | k | 32.32 | l | ----- | z |
2001 | 32.91 | i | 29.50 | l | 40.05 | k | 42.00 | k | 56.90 | k | 61.30 | j | 66.47 | n | 67.53 | l | 61.35 | m | 51.30 | k | 41.95 | k | 28.30 | k | ----- | z |
2002 | 31.16 | l | 31.18 | k | 35.60 | p | 45.47 | k | 49.75 | o | 60.65 | j | 71.84 | l | 66.40 | p | 60.50 | n | 47.38 | r | 40.00 | o | 30.47 | n | ----- | z |
2003 | 38.67 | m | 35.94 | j | 36.22 | m | 40.50 | h | 57.29 | q | 60.53 | m | 73.15 | e | 71.04 | h | 64.40 | j | 56.00 | m | 33.00 | t | 31.19 | j | 73.15 | k |
2004 | 31.35 | k | 31.28 | k | 43.58 | l | 45.88 | m | 52.59 | n | 59.41 | h | 68.42 | l | 66.35 | k | 58.19 | n | 49.50 | o | 36.65 | m | 34.00 | t | ----- | z |
2005 | 36.86 | q | 39.94 | k | 36.43 | q | 41.25 | r | 55.21 | q | 61.05 | i | 67.80 | p | 68.24 | n | 57.16 | k | 51.15 | r | ----- | z | 31.53 | n | ----- | z |
2006 | 29.40 | p | 32.69 | l | 38.07 | p | 44.71 | p | 54.46 | r | 65.29 | p | 72.93 | p | 67.89 | m | 59.62 | q | 47.79 | l | 36.33 | u | 28.67 | v | ----- | z |
2007 | 28.14 | q | 33.17 | p | 42.47 | l | 45.00 | n | 52.67 | g | 58.69 | n | 70.04 | f | 71.00 | f | 61.43 | g | 47.68 | l | 42.29 | b | 30.71 | j | 42.29 | k |
2008 | 33.00 | l | 32.86 | g | 38.63 | d | 44.85 | j | 52.21 | b | 60.97 | 71.73 | a | 71.62 | e | 62.80 | j | ----- | z | ----- | z | 33.94 | 54.85 | f | ||
2009 | 37.79 | c | 34.96 | 37.90 | 44.59 | a | 57.89 | d | 61.57 | 71.94 | 67.06 | 64.03 | 47.74 | 40.79 | a | 31.61 | 49.82 | |||||||||
2010 | 37.00 | 38.00 | a | 38.00 | 42.13 | 49.19 | 59.37 | 72.52 | 68.77 | 60.53 | 52.90 | a | 37.43 | 38.23 | 49.51 | |||||||||||
2011 | 31.68 | 29.86 | 39.48 | 47.17 | 50.00 | 59.10 | 70.32 | 71.42 | 63.23 | 51.20 | a | 38.00 | 32.39 | 48.65 | ||||||||||||
2012 | 32.84 | 33.79 | 36.97 | 47.27 | 54.35 | 62.73 | 70.84 | 71.81 | 63.97 | 50.35 | 40.67 | 32.81 | 49.87 | |||||||||||||
2013 | 30.77 | 32.04 | 41.94 | 45.73 | 53.52 | f | 62.22 | c | 74.71 | 68.36 | c | 62.50 | 45.90 | 40.83 | 32.74 | 48.89 | a | |||||||||
2014 | 34.82 | c | 36.07 | 43.06 | o | 44.87 | 54.39 | 60.43 | 72.61 | 67.23 | 63.83 | 53.45 | 41.77 | d | 36.16 | f | 52.95 | b | ||||||||
2015 | 38.65 | 41.82 | 44.58 | e | 45.76 | e | 51.97 | b | 64.23 | 68.96 | e | 71.11 | c | 67.64 | b | 57.68 | 40.12 | e | 31.03 | a | 51.96 | |||||
2016 | 35.71 | 40.85 | b | 41.89 | d | 47.92 | d | 52.59 | b | 67.73 | 73.03 | 70.39 | 62.17 | 54.30 | a | 44.38 | a | 36.83 | a | 52.32 | ||||||
2017 | 38.60 | a | 40.71 | 43.74 | 44.89 | k | 53.10 | 63.22 | g | 74.23 | 70.19 | 61.87 | 52.55 | i | 44.17 | 37.60 | a | 51.58 | c | |||||||
2018 | 39.48 | 36.82 | 42.77 | 49.67 | i | 56.58 | e | 63.08 | e | 74.10 | 71.52 | 64.24 | a | 54.35 | 40.63 | 35.61 | 52.65 | a | ||||||||
2019 | 39.42 | 34.62 | l | 42.83 | h | 52.14 | i | 50.50 | m | 62.46 | b | 70.36 | c | 69.50 | g | 65.59 | a | 49.73 | e | 43.48 | a | 38.36 | c | 52.77 | e | |
2020 | 36.83 | h | 39.00 | m | 42.19 | j | 45.83 | g | 58.16 | f | 61.00 | c | 72.39 | h | 72.97 | 65.28 | e | 52.81 | d | 44.71 | f | 36.53 | l | 63.02 | h | |
2021 | 39.69 | o | 39.94 | l | 46.42 | s | 52.50 | t | 54.88 | o | 72.69 | n | 76.71 | j | 77.00 | n | 68.00 | g | 49.88 | o | 45.64 | h | 36.94 | 36.94 | k | |
2022 | 36.19 | 37.55 | f | 43.29 | 49.00 | 57.39 | 65.41 | a | 74.10 | b | 73.52 | 68.93 | c | 53.67 | a | 37.66 | a | 31.35 | h | 55.92 | b | |||||
2023 | 34.96 | e | 33.96 | a | 37.90 | b | 44.83 | 53.97 | 57.40 | 72.63 | a | 72.55 | 61.93 | 52.48 | 39.79 | a | 36.35 | 49.90 | ||||||||
2024 | 35.11 | c | 39.28 | 40.94 | 42.17 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.44 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 34.02 | 35.77 | 38.86 | 43.96 | 51.84 | 59.73 | 69.52 | 68.39 | 61.18 | 49.75 | 39.47 | 33.41 | 48.66 | |||||||||||||
S.D. | 2.93 | 3.40 | 2.74 | 2.68 | 3.13 | 3.25 | 3.18 | 2.79 | 3.35 | 3.12 | 3.05 | 2.70 | 1.38 | |||||||||||||
SKEW | 0.13 | 0.01 | 0.04 | -0.07 | -0.17 | 0.01 | -0.77 | -0.44 | -0.14 | 0.20 | -0.10 | -0.05 | 0.35 | |||||||||||||
MAX | 40.03 | 42.14 | 44.84 | 49.07 | 57.89 | 67.73 | 74.71 | 73.52 | 68.93 | 57.68 | 47.27 | 38.36 | 52.32 | |||||||||||||
MIN | 27.94 | 29.71 | 32.65 | 38.47 | 43.61 | 52.30 | 59.69 | 61.65 | 53.43 | 43.58 | 32.03 | 26.32 | 46.15 | |||||||||||||
YRS | 55 | 53 | 52 | 52 | 54 | 56 | 56 | 55 | 54 | 53 | 54 | 54 | 43 |