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 | 53.00 | 66.33 | 66.32 | 63.29 | 59.68 | b | 50.26 | 30.10 | 26.77 | a | 51.97 | d | ||||||
1930 | 22.74 | 32.67 | a | 33.97 | 51.60 | 52.26 | 65.70 | 69.58 | 65.29 | 62.17 | 54.10 | 39.37 | 26.74 | 48.01 | ||||||||||||
1931 | 31.55 | 37.93 | a | 36.71 | ----- | z | ----- | z | 60.53 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.68 | h | |||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 71.58 | 71.10 | 65.10 | 56.29 | 41.90 | 32.61 | 56.43 | f | ||||||
1963 | 21.35 | 30.82 | 42.00 | 55.83 | 63.16 | 68.80 | 73.45 | 71.55 | 64.50 | 55.32 | 40.97 | 28.19 | 51.33 | |||||||||||||
1964 | 24.06 | 27.00 | 38.90 | 51.87 | 61.77 | 68.60 | 72.77 | 72.87 | 65.37 | 50.55 | 42.00 | 31.87 | 50.64 | |||||||||||||
1965 | 33.88 | g | 32.64 | f | 35.81 | 53.70 | 61.00 | k | 68.24 | a | 70.55 | 68.45 | 64.50 | 49.32 | 44.28 | a | 38.03 | 54.76 | c | |||||||
1966 | 26.97 | a | 27.50 | b | 44.10 | 50.57 | 60.03 | 68.07 | 74.26 | 68.65 | 64.00 | 47.55 | 42.90 | 24.23 | a | 49.90 | ||||||||||
1967 | 26.29 | 33.18 | 46.43 | a | 56.61 | l | 55.58 | e | 69.67 | 70.39 | 67.23 | a | 60.10 | 50.48 | 42.87 | 29.64 | c | 50.17 | a | |||||||
1968 | 33.53 | a | 32.93 | b | 41.10 | j | ----- | z | ----- | z | 66.03 | 68.03 | 69.33 | j | 59.73 | 51.90 | a | 39.50 | 27.07 | a | 47.34 | d | ||||
1969 | 34.08 | e | 34.33 | d | 35.75 | k | 51.70 | 56.68 | 67.27 | 72.90 | 71.84 | 63.90 | 52.77 | 36.44 | c | 34.66 | b | 52.42 | a | |||||||
1970 | 27.16 | 35.68 | 36.24 | b | 49.33 | 54.48 | 64.41 | a | 68.74 | 68.26 | 61.57 | 46.26 | 33.70 | 35.15 | d | 48.42 | ||||||||||
1971 | 29.45 | 31.19 | a | 37.03 | 46.97 | 56.29 | 66.80 | 67.89 | c | 63.04 | f | 61.07 | 52.07 | b | 41.03 | 37.16 | 47.90 | a | ||||||||
1972 | 28.61 | 31.85 | b | 43.55 | 52.15 | d | 59.06 | 65.34 | a | 68.72 | b | ----- | z | 64.07 | 52.90 | 34.57 | 28.15 | e | 48.09 | a | ||||||
1973 | 28.00 | a | 31.70 | a | 42.45 | 44.40 | 56.03 | a | 64.38 | a | 67.97 | 67.42 | 60.83 | a | 51.58 | 40.27 | 28.71 | g | 50.46 | a | ||||||
1974 | 28.84 | 33.18 | 48.61 | 51.70 | 64.16 | 67.13 | 70.03 | 67.13 | 56.67 | 53.13 | 40.77 | 32.45 | 51.15 | |||||||||||||
1975 | 32.16 | 33.75 | 39.03 | 47.93 | 57.16 | 66.10 | 64.74 | 64.60 | a | 57.37 | 52.03 | 40.32 | b | 31.45 | 48.89 | |||||||||||
1976 | 28.27 | a | 38.93 | 42.52 | 53.10 | 54.68 | 67.07 | 66.06 | 64.80 | a | 59.20 | 45.87 | 35.00 | 29.10 | 48.72 | |||||||||||
1977 | 28.94 | 35.96 | 41.45 | 51.93 | 63.77 | 67.80 | 71.81 | 72.87 | 69.27 | 54.52 | 40.97 | 34.68 | 52.83 | |||||||||||||
1978 | 27.74 | 30.32 | 44.03 | 56.30 | 62.90 | 68.03 | 72.32 | 68.81 | e | 63.33 | 52.68 | 45.23 | 31.74 | 51.95 | ||||||||||||
1979 | 28.52 | 31.64 | 42.84 | 52.53 | 59.00 | 65.37 | 70.87 | 67.80 | a | 60.73 | 53.10 | 37.83 | 34.23 | 50.37 | ||||||||||||
1980 | 35.35 | 35.59 | 42.68 | 47.87 | 60.90 | 72.73 | 74.29 | 71.10 | 66.31 | a | 50.84 | 38.70 | 35.48 | 52.65 | ||||||||||||
1981 | 34.65 | 38.89 | 43.55 | 55.40 | 58.67 | m | 66.10 | 71.06 | 67.87 | 63.87 | 55.19 | 41.83 | 36.04 | h | 53.84 | b | ||||||||||
1982 | 31.48 | 34.89 | 47.20 | a | 54.00 | 59.90 | 67.80 | 72.23 | 71.55 | 66.10 | 53.71 | 42.75 | b | 34.39 | 53.00 | |||||||||||
1983 | 32.84 | 37.25 | 43.77 | 48.47 | 58.93 | a | 65.17 | a | 71.37 | a | 70.61 | 66.27 | 57.84 | 45.30 | 26.60 | a | 52.04 | |||||||||
1984 | 30.77 | 34.28 | 43.29 | 49.21 | a | 62.68 | 70.17 | 70.00 | 70.48 | 60.87 | 53.52 | 42.20 | 39.65 | 52.26 | ||||||||||||
1985 | 27.19 | 34.89 | 47.29 | 54.00 | 62.16 | 65.97 | 68.13 | 71.84 | 65.73 | 56.71 | 45.77 | 28.10 | 52.31 | |||||||||||||
1986 | 32.81 | 40.18 | 47.29 | 56.80 | 61.68 | 69.20 | 71.77 | 70.06 | 67.47 | 54.19 | 42.80 | 34.29 | 54.05 | |||||||||||||
1987 | 32.27 | a | 37.82 | 38.32 | 47.50 | 58.23 | 66.30 | 70.03 | 69.71 | 61.60 | 55.29 | 39.50 | 33.13 | 50.81 | ||||||||||||
1988 | 30.45 | 35.31 | 39.33 | a | 50.50 | 58.03 | 68.30 | 70.42 | 68.61 | 63.47 | 53.61 | 43.23 | 32.61 | 51.16 | ||||||||||||
1989 | 35.48 | 31.48 | a | 42.19 | 53.20 | 64.97 | 68.07 | 71.00 | 69.32 | 61.10 | 55.52 | 42.33 | 27.94 | 51.88 | ||||||||||||
1990 | 35.10 | 40.25 | 45.03 | 54.79 | a | 59.52 | 74.27 | 69.48 | 67.43 | a | 65.23 | 51.17 | a | 45.03 | 32.35 | 53.31 | ||||||||||
1991 | 32.70 | a | 40.61 | 46.32 | 52.30 | 63.77 | 68.73 | 70.19 | 68.13 | 61.62 | a | 52.60 | a | 38.72 | a | 38.27 | e | 52.83 | ||||||||
1992 | 33.74 | 40.21 | a | 46.32 | 52.87 | 59.67 | y | 67.27 | 71.16 | 68.29 | 64.27 | 53.00 | 39.83 | 34.45 | k | 53.70 | b | |||||||||
1993 | 33.30 | a | 38.64 | 43.27 | a | 51.30 | 59.07 | d | 69.30 | c | 73.35 | 72.29 | 63.07 | 51.86 | b | 39.75 | b | 37.63 | a | 52.74 | ||||||
1994 | 34.45 | 36.04 | 47.00 | 52.17 | 62.03 | 73.17 | 73.00 | 71.65 | 62.17 | 56.35 | 46.18 | b | 39.97 | 54.51 | ||||||||||||
1995 | 35.19 | 39.16 | c | 45.35 | 52.63 | 62.52 | 67.53 | 72.61 | 72.48 | 64.10 | 54.87 | 45.34 | a | 34.48 | 53.86 | |||||||||||
1996 | 32.29 | 38.48 | 39.16 | 53.70 | 69.00 | 71.52 | a | 74.87 | 71.45 | 62.73 | 53.53 | a | 44.00 | a | 35.67 | a | 53.87 | |||||||||
1997 | 33.10 | 37.41 | a | 46.19 | 48.20 | 60.61 | 67.50 | 73.35 | 72.16 | 66.53 | 54.23 | 39.47 | 30.83 | a | 52.47 | |||||||||||
1998 | 36.39 | 38.61 | 42.52 | 49.73 | 66.39 | 73.37 | 75.97 | 71.68 | 67.67 | 60.61 | 46.97 | 34.77 | 55.39 | |||||||||||||
1999 | 35.58 | 42.93 | 46.23 | a | 54.63 | 62.68 | 70.23 | 72.87 | 73.65 | 66.21 | a | 52.74 | 45.23 | 35.90 | 54.91 | |||||||||||
2000 | 37.32 | 43.93 | a | ----- | z | 53.59 | a | 66.54 | c | 69.70 | c | 74.13 | a | 71.77 | a | 64.36 | b | 56.16 | f | 38.52 | e | 31.14 | b | 55.10 | b | |
2001 | 30.97 | 38.37 | a | 40.93 | c | 53.35 | d | 62.93 | c | 72.31 | a | 74.00 | a | 71.50 | c | 63.16 | e | 54.72 | b | 47.37 | c | 33.00 | b | 53.55 | ||
2002 | 33.37 | d | 30.64 | c | 39.56 | f | 57.67 | 62.14 | c | 70.76 | e | 70.46 | c | 72.29 | g | 62.08 | f | 53.76 | b | 38.81 | c | 34.90 | b | 50.28 | c | |
2003 | 29.70 | a | 33.82 | 42.11 | d | 49.75 | f | 61.00 | a | 65.58 | f | 69.74 | d | 69.44 | f | 62.84 | e | 54.37 | d | 40.17 | f | 29.71 | g | 50.51 | e | |
2004 | 33.94 | n | 33.48 | f | 48.31 | e | 50.38 | f | 53.62 | b | 66.43 | g | 65.60 | a | ----- | z | 63.42 | d | ----- | z | ----- | z | 30.29 | 52.25 | g | |
2005 | 36.71 | c | 39.00 | 40.03 | 51.13 | 61.04 | h | 68.57 | 69.61 | 67.42 | 66.43 | 54.32 | 39.87 | ----- | z | 53.31 | b | |||||||||
2006 | 33.97 | b | 34.79 | 47.63 | a | 57.43 | 64.59 | d | 67.23 | q | 70.18 | t | 70.44 | d | 59.83 | f | 50.90 | j | ----- | z | ----- | z | 51.48 | f | ||
2007 | ----- | z | ----- | z | ----- | z | ----- | z | 65.17 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.33 | p | 68.19 | 60.67 | 53.10 | 39.79 | a | 31.61 | 50.67 | g | ||||
2009 | 29.81 | 38.19 | a | 45.74 | 51.27 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.25 | h | |||
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.44 | n | 50.59 | b | 39.57 | 32.03 | a | 40.73 | i | |
2011 | 28.13 | 29.50 | 48.03 | 54.96 | c | 61.48 | 75.10 | 75.97 | 75.62 | b | 64.00 | 52.97 | 40.67 | 33.45 | 53.32 | |||||||||||
2012 | 32.74 | 37.42 | c | ----- | z | 62.83 | r | 64.65 | 73.40 | 71.37 | l | 71.38 | j | 65.50 | 56.75 | o | ----- | z | ----- | z | 54.74 | g | ||||
2013 | 30.81 | 32.29 | 43.26 | 50.10 | 59.10 | 70.76 | a | 69.48 | 72.03 | a | 64.50 | 51.65 | 37.47 | 29.16 | 50.88 | |||||||||||
2014 | 27.52 | 32.14 | 37.00 | 48.57 | b | 58.71 | 70.57 | 71.26 | 70.61 | 64.43 | 53.19 | 35.07 | 37.03 | a | 50.51 | |||||||||||
2015 | 30.03 | 33.07 | 40.42 | 52.33 | 60.16 | 68.30 | 72.45 | 71.13 | 66.40 | 57.43 | a | 39.57 | 33.23 | 52.04 | ||||||||||||
2016 | 30.68 | 36.45 | 45.10 | 53.53 | 60.45 | 68.50 | 75.84 | 71.10 | 66.10 | 59.45 | 47.33 | 35.06 | 54.13 | |||||||||||||
2017 | 34.06 | 39.14 | 49.29 | c | 57.72 | l | 59.00 | a | 71.04 | g | ----- | z | 67.13 | p | 67.03 | 52.77 | 44.17 | 32.84 | 47.29 | d | ||||||
2018 | 28.34 | b | 37.75 | 47.90 | 51.53 | 68.61 | 74.50 | b | 74.32 | 73.77 | 65.60 | 56.52 | 37.17 | 35.19 | 54.27 | |||||||||||
2019 | 33.94 | 38.57 | 42.90 | 52.43 | 61.77 | 67.43 | 71.84 | 76.23 | 70.23 | 53.27 | a | 37.57 | 36.06 | 53.52 | ||||||||||||
2020 | 36.71 | 33.31 | 51.90 | 53.00 | 63.90 | 71.00 | 76.39 | 74.10 | 61.80 | 52.70 | a | 48.27 | 31.61 | 54.56 | ||||||||||||
2021 | 32.97 | 29.07 | 45.84 | 52.90 | 63.90 | 70.33 | 70.94 | 70.81 | 66.53 | 57.94 | 43.53 | 42.13 | 53.91 | |||||||||||||
2022 | 28.87 | 30.18 | 43.36 | f | 58.07 | 65.52 | 73.35 | j | 75.10 | 72.68 | 65.77 | 53.77 | 39.93 | 36.50 | a | 52.64 | b | |||||||||
2023 | 39.79 | l | 37.76 | c | 45.39 | 51.73 | 62.06 | 71.40 | 76.39 | 77.10 | 72.77 | 58.19 | 45.63 | 39.48 | 57.99 | a | ||||||||||
2024 | 31.16 | 42.21 | 46.81 | 54.59 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.06 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.23 | 35.44 | 43.39 | 52.16 | 60.80 | 68.67 | 71.40 | 70.32 | 63.92 | 53.46 | 41.13 | 33.10 | 52.23 | |||||||||||||
S.D. | 3.51 | 3.88 | 3.89 | 2.85 | 3.76 | 2.88 | 2.75 | 2.86 | 2.96 | 2.82 | 3.71 | 3.84 | 1.86 | |||||||||||||
SKEW | -0.53 | -0.07 | -0.38 | -0.21 | -0.22 | 0.14 | -0.21 | -0.13 | 0.12 | -0.15 | -0.36 | -0.06 | -0.53 | |||||||||||||
MAX | 37.32 | 43.93 | 51.90 | 58.07 | 69.00 | 75.10 | 76.39 | 77.10 | 72.77 | 60.61 | 48.27 | 42.13 | 55.39 | |||||||||||||
MIN | 21.35 | 27.00 | 33.97 | 44.40 | 52.26 | 60.53 | 64.74 | 63.29 | 56.67 | 45.87 | 30.10 | 24.23 | 48.01 | |||||||||||||
YRS | 58 | 59 | 55 | 53 | 54 | 55 | 57 | 53 | 59 | 58 | 58 | 55 | 39 |