YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.11 | h | 67.10 | 65.31 | 56.22 | 44.29 | 31.55 | b | 22.81 | 47.88 | f | |||||
1931 | 23.87 | 33.21 | 33.74 | 44.75 | 49.98 | 62.27 | 69.44 | 65.69 | 59.83 | 47.85 | 29.87 | 17.52 | i | 47.32 | a | |||||||||||
1932 | 13.02 | 30.31 | 34.60 | a | 44.23 | j | 50.50 | 58.27 | 67.34 | 65.42 | 56.83 | a | 44.97 | 33.90 | 19.40 | 43.14 | a | |||||||||
1933 | 16.63 | 12.62 | 36.84 | 39.41 | a | 46.98 | 64.02 | a | 69.61 | 66.02 | 60.92 | 48.98 | 36.87 | 29.79 | 44.06 | |||||||||||
1934 | 29.98 | 35.93 | 41.68 | 47.17 | 57.29 | 58.52 | 69.44 | 67.03 | 57.30 | 47.92 | 34.25 | b | 27.05 | 47.80 | ||||||||||||
1935 | 27.32 | 30.79 | b | 32.95 | b | 43.73 | 48.35 | 56.66 | a | 62.66 | c | 60.05 | 52.41 | a | 39.85 | d | 27.83 | 21.47 | 42.01 | |||||||
1936 | 18.33 | a | 24.67 | 32.77 | c | 40.86 | a | 48.62 | c | 64.88 | a | 69.58 | 64.53 | a | 51.86 | a | 42.20 | a | 28.03 | a | 22.83 | e | 42.43 | |||
1937 | 4.20 | c | 17.90 | d | 34.18 | a | 43.37 | 55.10 | 61.64 | a | 68.15 | k | 68.18 | 59.22 | 48.74 | 35.80 | 30.76 | 41.73 | a | |||||||
1938 | 25.31 | 28.37 | a | 35.40 | a | 43.38 | a | 50.78 | a | 65.00 | r | 66.19 | 68.29 | 58.92 | 47.92 | a | 28.57 | a | 26.87 | 43.64 | a | |||||
1939 | 21.74 | b | 15.20 | a | 33.39 | 47.90 | a | 55.31 | 61.40 | 69.15 | 66.89 | 60.29 | a | 45.40 | 37.93 | 31.03 | 45.47 | |||||||||
1940 | 22.30 | a | 28.67 | 38.00 | 45.36 | a | 54.95 | 63.45 | 69.63 | 66.97 | 58.97 | 47.80 | a | 30.93 | 27.65 | a | 46.22 | |||||||||
1941 | 24.19 | 32.05 | 36.53 | 39.76 | a | 52.32 | 56.82 | 65.69 | 64.00 | 53.95 | a | 45.29 | 35.37 | 27.95 | 44.49 | |||||||||||
1942 | 21.39 | 20.38 | 29.19 | 44.10 | a | 48.61 | 59.03 | 67.95 | a | 65.75 | a | 57.03 | 47.19 | b | 37.57 | 30.53 | 44.06 | |||||||||
1943 | 25.60 | b | 28.84 | c | 36.13 | 48.57 | 51.66 | 59.58 | 67.53 | 66.55 | 58.70 | 46.58 | 35.67 | 27.15 | 46.05 | |||||||||||
1944 | 22.31 | 26.62 | 31.30 | a | 38.27 | 50.76 | 56.75 | 65.95 | ----- | z | 58.78 | 49.24 | 33.58 | 26.48 | 41.82 | a | ||||||||||
1945 | 23.48 | a | 31.05 | 33.53 | a | 39.92 | 52.37 | 57.55 | 68.23 | 67.95 | 58.62 | 46.87 | 31.60 | 19.92 | a | 44.26 | ||||||||||
1946 | 22.11 | 26.93 | 38.53 | 49.43 | 52.16 | 62.82 | 69.48 | 67.73 | 58.33 | a | 45.06 | 33.48 | 32.23 | 46.52 | ||||||||||||
1947 | 19.05 | 33.73 | 37.60 | a | 42.25 | 55.60 | 58.62 | 68.82 | 66.37 | 60.98 | 49.58 | 30.02 | a | 24.69 | 45.61 | |||||||||||
1948 | 22.18 | 25.88 | 28.08 | 45.98 | 55.77 | 59.25 | 67.03 | 66.15 | 60.85 | 46.77 | 30.07 | 25.36 | b | 44.45 | ||||||||||||
1949 | 17.57 | c | 17.11 | 33.92 | 45.70 | 49.92 | g | 60.25 | b | 67.56 | 64.37 | 59.93 | 45.08 | 40.70 | 22.15 | 43.12 | a | |||||||||
1950 | 20.83 | a | 28.11 | 35.29 | 44.87 | 50.92 | 60.40 | 66.81 | 64.76 | 56.12 | 52.24 | 37.92 | 32.77 | 45.92 | ||||||||||||
1951 | 24.56 | 29.80 | 34.95 | a | 43.18 | 53.00 | 58.77 | 70.52 | 65.45 | 57.42 | 45.40 | 30.45 | 19.69 | 44.43 | ||||||||||||
1952 | 22.95 | 23.28 | 26.85 | 45.32 | 53.63 | 61.78 | 67.68 | 68.08 | 60.15 | 49.11 | 27.83 | 22.18 | 44.07 | |||||||||||||
1953 | 28.32 | 26.91 | 36.37 | 41.57 | 48.34 | 63.00 | 69.89 | 65.32 | 58.66 | a | 49.13 | a | 36.43 | 22.65 | 45.55 | |||||||||||
1954 | 29.97 | 36.64 | 33.16 | 47.88 | 54.50 | 61.72 | 70.98 | 64.87 | 59.40 | 49.73 | 37.33 | 24.27 | 47.54 | |||||||||||||
1955 | 18.13 | 15.48 | 32.29 | 41.19 | a | 51.13 | 58.62 | 67.61 | 68.37 | 58.83 | 48.33 | a | 34.15 | 27.28 | a | 43.45 | ||||||||||
1956 | 32.87 | 25.66 | a | 35.52 | 43.75 | 54.69 | 64.60 | a | 66.40 | a | 63.58 | a | 60.10 | 47.22 | a | 30.80 | 25.08 | 45.86 | ||||||||
1957 | 26.73 | c | 31.79 | 37.23 | 42.66 | a | 48.95 | 61.25 | 66.85 | 65.85 | 56.35 | 47.58 | 30.87 | 30.03 | 45.51 | |||||||||||
1958 | 25.15 | 32.20 | 31.66 | 41.32 | 55.15 | 63.50 | 66.85 | 69.27 | a | 59.52 | a | 47.83 | b | 36.10 | 31.55 | 46.67 | ||||||||||
1959 | 25.60 | a | 27.42 | b | 35.33 | a | 44.68 | 51.73 | a | 64.05 | 69.65 | 66.40 | 58.50 | a | 46.19 | 34.72 | 28.16 | 46.04 | ||||||||
1960 | 17.44 | 19.18 | a | 34.34 | 44.19 | a | 51.10 | 61.54 | g | 68.28 | b | 68.50 | a | 61.43 | 45.82 | 35.59 | a | 22.58 | 42.59 | a | ||||||
1961 | 19.67 | a | 30.95 | 35.76 | 43.80 | 53.10 | 64.15 | 69.11 | 68.17 | b | 53.58 | 45.81 | 33.36 | a | 20.57 | a | 44.84 | |||||||||
1962 | 21.70 | c | 31.91 | a | 30.23 | a | 46.60 | a | 51.02 | 60.66 | a | 66.52 | a | 66.76 | 59.03 | 49.10 | 37.68 | 28.98 | a | 45.85 | ||||||
1963 | 14.47 | 33.70 | 34.65 | 42.68 | 55.03 | 60.77 | b | 68.92 | a | 66.97 | 61.32 | 52.10 | 37.57 | 25.31 | 46.12 | |||||||||||
1964 | 22.42 | 24.02 | 29.19 | 40.53 | 51.97 | 60.83 | 70.03 | 65.63 | 58.00 | 48.97 | a | 30.60 | 23.47 | 43.81 | ||||||||||||
1965 | 26.87 | 25.68 | 33.16 | 42.32 | 49.21 | 56.13 | 67.16 | 65.32 | 55.55 | a | 48.76 | 38.77 | 26.72 | a | 44.64 | |||||||||||
1966 | 21.40 | a | 20.52 | a | 38.15 | a | 42.92 | 54.58 | a | 60.78 | a | 69.92 | 67.71 | 59.73 | 46.55 | b | 38.50 | a | 27.41 | b | 45.68 | |||||
1967 | 21.58 | a | 31.54 | a | 39.58 | a | 41.41 | a | 48.98 | a | 58.52 | 69.23 | a | 66.71 | 59.33 | 48.95 | a | 35.71 | a | 20.02 | a | 45.13 | ||||
1968 | 18.52 | 29.79 | 36.50 | 38.97 | a | 48.40 | 62.66 | a | 67.43 | a | 62.23 | a | 56.03 | 47.48 | 33.93 | a | 19.71 | 43.47 | ||||||||
1969 | 26.74 | 25.52 | 28.07 | a | 45.29 | b | 55.23 | 59.65 | 69.02 | 69.27 | 60.05 | 42.12 | a | 34.62 | 29.08 | 45.39 | ||||||||||
1970 | 26.50 | a | 34.15 | a | 33.18 | 38.33 | 53.65 | 60.07 | a | 68.68 | 68.92 | 55.70 | 42.59 | c | 35.98 | a | 23.80 | a | 45.13 | |||||||
1971 | 24.75 | a | 28.84 | 35.03 | 42.74 | a | 49.55 | a | 60.68 | 69.00 | a | 68.13 | 55.62 | 44.42 | 31.59 | a | 22.09 | b | 44.37 | |||||||
1972 | 26.37 | a | 33.54 | a | 39.94 | 43.67 | a | 52.11 | 62.88 | 69.87 | 66.39 | 58.80 | 48.53 | 29.95 | 18.39 | 45.87 | ||||||||||
1973 | 14.15 | 23.11 | 32.21 | 39.78 | 51.81 | 59.82 | 66.58 | 66.17 | b | 55.32 | 46.58 | a | 33.88 | 24.07 | a | 42.79 | ||||||||||
1974 | 16.42 | 18.84 | 40.94 | 41.26 | a | 55.18 | 64.40 | 67.53 | 64.27 | 57.62 | a | 49.10 | 34.68 | 23.55 | 44.48 | |||||||||||
1975 | 20.82 | a | 25.27 | 34.31 | 39.52 | a | 48.61 | 58.18 | 66.85 | 63.24 | 57.17 | 47.33 | b | 31.45 | 24.80 | a | 43.13 | |||||||||
1976 | 19.50 | 35.00 | b | 35.98 | 43.09 | b | 53.85 | a | 61.08 | 68.95 | 65.82 | 58.79 | a | 44.07 | a | 35.65 | 25.58 | 45.61 | ||||||||
1977 | 18.58 | 30.52 | 34.10 | 46.90 | a | 51.60 | b | 65.28 | 69.92 | 67.60 | b | 61.09 | b | 49.19 | 37.52 | 30.55 | 46.90 | |||||||||
1978 | 26.10 | a | 23.45 | 38.92 | 45.38 | a | 50.48 | 62.67 | a | 67.42 | 65.40 | 57.74 | a | 49.27 | 37.91 | a | 18.35 | 45.26 | ||||||||
1979 | 17.28 | a | 19.66 | 31.35 | 44.27 | 51.83 | a | 59.98 | 67.45 | b | 64.92 | 60.68 | 49.71 | 28.40 | 25.98 | 43.46 | ||||||||||
1980 | 25.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.13 | p | 66.72 | a | 58.62 | 46.85 | 36.27 | 36.21 | 45.01 | f | |||||
1981 | 31.48 | 30.93 | 36.13 | 47.43 | 50.89 | 65.58 | 69.52 | 66.85 | 60.42 | 46.63 | 39.50 | 29.29 | 47.89 | |||||||||||||
1982 | 22.12 | a | 27.28 | a | 37.66 | 43.62 | 52.90 | a | 60.83 | 68.98 | 68.64 | b | 61.07 | 44.17 | a | 34.59 | a | 23.82 | a | 45.47 | ||||||
1983 | 25.90 | a | 29.46 | 35.52 | 39.33 | a | 49.84 | b | 60.02 | 68.67 | b | 68.65 | a | 61.63 | 48.77 | 35.45 | a | 24.63 | a | 45.66 | ||||||
1984 | 19.47 | 24.70 | a | 35.87 | 41.76 | a | 57.12 | a | 62.10 | a | 70.90 | 68.63 | 60.83 | 42.98 | b | 34.10 | a | 26.67 | b | 45.43 | ||||||
1985 | 24.65 | 23.59 | 38.15 | a | 47.40 | 53.61 | 63.36 | a | 69.55 | a | 67.06 | 55.55 | a | 48.02 | b | 34.80 | c | 28.81 | 46.21 | |||||||
1986 | 34.05 | a | 34.73 | 41.68 | a | 41.38 | 52.39 | 62.64 | a | 67.06 | 69.24 | 57.21 | b | 46.45 | 37.42 | 29.74 | 47.83 | |||||||||
1987 | 23.15 | a | 29.45 | 33.10 | 48.22 | a | 52.85 | 64.10 | a | 67.55 | a | 65.77 | 58.82 | 50.65 | 34.47 | a | 24.27 | 46.03 | ||||||||
1988 | 18.14 | b | 26.00 | 35.47 | 44.88 | 52.82 | 64.35 | 69.18 | a | 67.35 | 57.29 | a | 51.61 | 32.09 | a | 24.14 | b | 45.28 | ||||||||
1989 | 15.55 | 25.98 | d | 40.76 | 47.85 | 54.60 | 61.30 | 69.52 | 64.12 | a | 59.32 | b | 45.64 | b | 35.33 | 26.03 | a | 45.50 | ||||||||
1990 | 21.57 | a | 27.38 | 38.53 | 46.35 | 50.79 | 64.60 | a | 68.18 | 65.35 | 61.90 | 46.19 | 33.62 | a | 16.45 | a | 45.08 | |||||||||
1991 | 15.02 | 26.77 | 33.98 | a | 40.02 | 51.19 | 59.43 | a | 67.06 | 66.50 | 58.10 | 47.58 | 31.43 | b | 24.71 | b | 43.48 | |||||||||
1992 | 19.26 | 29.50 | b | 36.29 | c | 48.07 | a | 53.81 | d | 60.82 | 65.25 | a | 66.61 | d | 57.98 | b | 49.86 | f | 29.89 | c | 21.20 | c | 44.42 | a | ||
1993 | 26.22 | b | 27.74 | a | 38.62 | b | 45.07 | c | 53.19 | b | 60.48 | b | 66.43 | b | 65.16 | c | 57.65 | 44.94 | f | 32.15 | c | 26.54 | c | 45.39 | a | |
1994 | 28.18 | a | 24.85 | a | 41.36 | b | 45.31 | d | 55.07 | d | 70.38 | a | 70.91 | c | 69.93 | a | 59.44 | u | ----- | z | ----- | z | ----- | z | 50.75 | d |
1995 | 28.00 | c | 38.95 | g | 38.45 | b | 42.30 | c | 48.68 | 58.19 | a | 65.85 | 68.95 | 60.02 | 46.60 | a | 38.42 | 29.30 | a | 47.70 | a | |||||
1996 | 26.24 | 34.88 | 37.61 | 44.60 | 57.06 | 64.62 | 70.90 | b | 68.18 | a | 56.52 | 45.73 | 35.69 | a | 26.58 | 47.38 | ||||||||||
1997 | 23.47 | a | 25.86 | 36.85 | a | 41.67 | 56.17 | g | 61.33 | 66.88 | a | 66.00 | 61.61 | c | 46.35 | 35.58 | 24.40 | 44.55 | a | |||||||
1998 | 26.55 | 28.29 | 36.48 | 41.70 | 52.53 | 59.18 | 70.69 | b | 68.45 | 62.08 | 47.26 | 35.88 | a | 28.97 | a | 46.51 | ||||||||||
1999 | 31.39 | 34.12 | 40.94 | 41.00 | 50.56 | 60.67 | 68.74 | 65.85 | 57.15 | 48.27 | a | 38.53 | 26.68 | 46.99 | ||||||||||||
2000 | 28.08 | 34.84 | 36.40 | a | 48.07 | 57.38 | a | 64.53 | 68.82 | 70.03 | 60.60 | 47.61 | 28.98 | 28.58 | 47.83 | |||||||||||
2001 | 24.87 | 29.68 | 39.08 | 45.45 | 55.71 | 63.42 | 69.58 | 67.56 | 60.88 | 48.87 | 36.05 | 20.94 | 46.84 | |||||||||||||
2002 | 21.94 | 25.68 | 34.84 | b | 49.48 | 54.39 | 66.33 | 71.74 | 67.23 | 58.50 | a | 44.84 | 35.22 | 28.71 | 46.57 | |||||||||||
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.18 | s | 48.70 | a | 34.98 | 29.19 | 37.63 | i | ||
2015 | 28.83 | e | 33.45 | 40.50 | 42.96 | b | 49.82 | 63.60 | 65.96 | d | 67.58 | a | 59.04 | f | 51.55 | a | 34.37 | 21.12 | b | 45.43 | a | |||||
2016 | 18.60 | 27.17 | 38.74 | 43.13 | 50.31 | 66.50 | 68.82 | 65.52 | 58.37 | 49.68 | 37.95 | a | 25.50 | 45.86 | ||||||||||||
2017 | 25.11 | 34.64 | 40.71 | 43.13 | 51.52 | 65.58 | 71.02 | 66.58 | 60.15 | 46.80 | a | 40.87 | 30.82 | 48.08 | ||||||||||||
2018 | 28.57 | a | 30.30 | 36.60 | 46.57 | b | 55.15 | 65.53 | 72.44 | 69.05 | 61.38 | 46.56 | 32.70 | b | 25.34 | 47.52 | ||||||||||
2019 | 21.53 | 20.38 | 37.02 | 46.03 | 47.37 | 61.12 | 69.71 | 68.97 | 62.40 | 41.95 | a | 36.02 | 26.68 | 44.93 | ||||||||||||
2020 | 21.24 | 26.91 | 39.26 | 43.25 | 55.71 | 64.30 | 68.60 | 70.69 | 59.93 | 48.82 | 36.65 | 24.06 | 46.62 | |||||||||||||
2021 | 23.37 | 25.93 | 36.16 | 44.25 | 53.27 | 66.75 | 72.58 | 67.81 | 61.52 | 44.94 | 39.37 | 29.13 | 47.09 | |||||||||||||
2022 | 27.77 | 27.05 | 35.52 | 43.05 | 52.71 | 64.48 | 71.35 | 68.50 | 63.55 | 47.40 | 30.53 | 24.63 | 46.38 | |||||||||||||
2023 | 20.42 | 19.93 | 27.95 | 41.22 | 53.44 | 58.43 | 71.53 | 68.97 | 59.72 | 48.98 | 35.40 | 29.71 | 44.64 | |||||||||||||
2024 | 25.95 | 32.40 | 37.11 | 41.22 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.82 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.92 | 27.53 | 35.63 | 43.73 | 52.35 | 61.71 | 68.54 | 66.74 | 58.73 | 47.17 | 34.36 | 25.72 | 45.48 | |||||||||||||
S.D. | 4.94 | 5.26 | 3.36 | 2.77 | 2.54 | 2.79 | 1.79 | 1.86 | 2.28 | 2.37 | 3.19 | 3.81 | 1.40 | |||||||||||||
SKEW | -0.57 | -0.60 | -0.44 | 0.09 | -0.02 | 0.28 | -0.21 | -0.57 | -0.66 | -0.48 | -0.27 | -0.04 | -0.24 | |||||||||||||
MAX | 34.05 | 36.64 | 41.68 | 49.48 | 57.38 | 70.38 | 72.58 | 70.69 | 63.55 | 52.24 | 40.87 | 36.21 | 48.08 | |||||||||||||
MIN | 4.20 | 12.63 | 26.85 | 38.27 | 46.98 | 56.13 | 62.66 | 60.05 | 51.86 | 39.85 | 27.83 | 16.45 | 42.01 | |||||||||||||
YRS | 82 | 80 | 81 | 79 | 78 | 78 | 80 | 81 | 80 | 80 | 82 | 81 | 67 |