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 | 70.23 | f | ----- | z | ----- | z | ----- | z | 46.68 | a | 35.23 | 28.84 | 36.92 | i | ||
1940 | 17.94 | 22.12 | 41.87 | 49.62 | b | 61.82 | 70.15 | 74.22 | b | 72.90 | 62.97 | 49.55 | 30.98 | 20.72 | a | 47.91 | ||||||||||
1941 | 13.52 | a | 23.79 | 39.50 | 45.95 | 59.58 | 63.28 | 71.88 | a | 70.11 | 57.13 | 48.23 | 35.25 | 27.52 | 46.31 | |||||||||||
1942 | 15.45 | a | 23.70 | 33.95 | 49.20 | 54.95 | a | 64.82 | 72.11 | 69.81 | 59.87 | 49.26 | 34.66 | a | 26.18 | 46.16 | ||||||||||
1943 | 24.68 | 29.30 | 38.00 | c | 53.04 | e | 55.31 | b | 63.03 | 71.87 | 71.06 | 62.00 | a | 49.00 | a | 33.65 | 25.88 | b | 48.07 | |||||||
1944 | 6.52 | c | 11.93 | a | 28.10 | 45.22 | 58.30 | a | 61.31 | a | 69.78 | a | 67.97 | 60.13 | 49.95 | a | 34.76 | a | 23.25 | a | 43.10 | |||||
1945 | 25.26 | 31.38 | 36.61 | 41.87 | 56.59 | b | 59.53 | 71.92 | 71.22 | a | 57.71 | b | 48.78 | a | 30.32 | 17.98 | 45.76 | |||||||||
1946 | 14.79 | 23.59 | 40.00 | 52.93 | 53.87 | 65.80 | 73.85 | 70.60 | 60.98 | 44.11 | 32.39 | b | 26.90 | a | 46.65 | |||||||||||
1947 | 14.98 | 28.30 | 38.87 | 45.67 | 58.03 | 59.91 | c | 68.63 | 67.35 | 60.95 | b | 49.82 | c | 27.75 | 15.85 | a | 44.68 | |||||||||
1948 | 11.07 | c | 16.76 | 30.65 | a | 47.35 | 56.68 | 65.59 | a | 71.56 | 69.96 | e | 62.98 | 48.21 | 29.47 | 18.34 | 44.05 | |||||||||
1949 | 1.58 | 4.76 | a | 34.98 | 51.02 | 57.18 | a | 64.43 | 71.32 | 69.32 | 61.74 | g | 45.32 | 38.98 | 15.15 | 41.28 | a | |||||||||
1950 | 3.37 | 10.22 | a | 33.00 | 47.68 | 52.76 | 62.73 | 69.02 | 67.76 | 60.52 | 50.65 | 34.78 | 27.66 | 43.35 | ||||||||||||
1951 | 16.82 | 30.07 | 35.98 | a | 48.47 | a | 59.20 | a | 63.53 | 73.85 | 69.29 | 59.48 | 47.29 | 32.32 | 17.39 | 46.14 | ||||||||||
1952 | 4.65 | 8.41 | 24.94 | 46.88 | 59.03 | 65.73 | 71.90 | a | 69.55 | 62.25 | 48.77 | 28.52 | 17.55 | 42.35 | ||||||||||||
1953 | 14.85 | 21.66 | 38.92 | 45.67 | 52.68 | 65.85 | 74.37 | d | 68.11 | 62.22 | 48.27 | 35.37 | 22.89 | 45.90 | ||||||||||||
1954 | 24.79 | 34.86 | 36.33 | a | 50.50 | 60.31 | 64.12 | 76.76 | 68.79 | 62.65 | 49.58 | 38.62 | 14.94 | 48.52 | ||||||||||||
1955 | 8.73 | 9.34 | 29.56 | 46.34 | b | 57.74 | 64.33 | 73.02 | a | 72.44 | 61.12 | a | 48.24 | 28.90 | 28.89 | 44.05 | ||||||||||
1956 | 28.56 | 22.93 | 37.35 | a | 47.95 | a | 60.13 | 67.57 | 71.77 | 67.21 | b | 62.50 | c | 49.56 | 31.10 | a | 13.94 | 46.71 | ||||||||
1957 | 9.94 | 18.38 | 38.77 | 46.40 | 54.92 | 64.66 | a | 70.94 | 69.40 | 58.57 | 49.12 | a | 31.95 | 26.58 | 44.97 | |||||||||||
1958 | 22.85 | 35.77 | 37.63 | 41.57 | i | 60.03 | 67.22 | a | 70.26 | h | 72.55 | 61.73 | 48.79 | 34.43 | b | 29.41 | b | 47.04 | b | |||||||
1959 | 24.24 | 26.27 | 37.15 | 47.58 | 55.21 | 67.48 | 70.77 | 69.11 | 58.83 | 47.97 | 34.43 | 24.42 | 46.96 | |||||||||||||
1960 | 12.32 | 11.95 | 35.87 | 48.83 | 57.17 | a | 67.30 | 72.87 | 68.87 | 64.29 | a | 49.08 | 35.85 | 23.76 | 45.68 | |||||||||||
1961 | 22.27 | 32.21 | 38.92 | 47.78 | 59.13 | 70.28 | a | 73.58 | 71.92 | 55.42 | 46.85 | 31.33 | a | 19.47 | 47.43 | |||||||||||
1962 | 10.87 | 25.59 | 31.77 | 50.71 | a | 57.05 | 65.54 | b | 71.34 | 69.05 | 61.50 | a | 50.87 | a | 38.12 | 24.58 | 46.41 | |||||||||
1963 | 13.98 | 34.00 | 37.00 | a | 47.05 | a | 60.73 | 64.58 | 73.98 | 72.33 | e | 64.09 | b | 54.50 | 37.45 | 19.77 | a | 48.29 | ||||||||
1964 | 20.30 | a | 25.02 | 31.53 | 46.43 | 56.64 | b | 64.09 | a | 74.89 | 68.21 | 59.35 | 50.06 | 26.77 | 15.17 | a | 44.87 | |||||||||
1965 | 13.71 | 18.12 | 28.47 | 47.52 | 54.40 | 61.76 | a | 70.74 | 67.07 | d | 53.24 | a | 49.21 | 39.93 | 22.68 | 43.90 | ||||||||||
1966 | 16.42 | 21.75 | 36.56 | 46.00 | 57.87 | 63.47 | 72.56 | 68.69 | 61.75 | 46.65 | 38.35 | 10.63 | 45.06 | |||||||||||||
1967 | 10.21 | 15.79 | 39.23 | 45.70 | 54.65 | 61.50 | 72.16 | 69.97 | 60.80 | 48.32 | 35.12 | 11.50 | 43.74 | |||||||||||||
1968 | 3.79 | 22.12 | 38.44 | 41.57 | 53.81 | 64.98 | a | 71.71 | 64.34 | 57.42 | 46.98 | 33.03 | 16.79 | 42.91 | ||||||||||||
1969 | 20.52 | 20.86 | 27.97 | 48.85 | 61.63 | 63.97 | 71.92 | 72.63 | 62.66 | a | 41.70 | a | 33.55 | 24.23 | 45.87 | |||||||||||
1970 | 15.27 | 32.70 | 35.26 | 40.97 | 56.74 | 63.77 | 70.52 | 70.77 | e | 55.48 | d | 42.46 | c | 35.27 | 21.65 | a | 45.07 | |||||||||
1971 | 21.32 | 27.86 | 34.97 | 44.86 | b | 54.16 | 65.24 | c | 71.50 | 71.85 | 55.70 | 44.41 | d | 25.93 | 16.52 | 44.53 | ||||||||||
1972 | 24.12 | a | 30.05 | 42.50 | 47.73 | 56.60 | 67.65 | 71.10 | 68.56 | 58.20 | 48.77 | c | 33.28 | 10.37 | 46.58 | |||||||||||
1973 | -0.10 | b | 10.84 | 32.56 | 44.35 | 56.19 | 63.43 | 69.69 | 68.17 | d | 57.58 | 47.19 | b | 31.15 | 18.58 | 41.64 | ||||||||||
1974 | 4.60 | 10.29 | 39.76 | 44.07 | 57.87 | 67.23 | 72.13 | 67.18 | 58.78 | 49.76 | 35.53 | 21.40 | a | 44.05 | ||||||||||||
1975 | 16.82 | 22.88 | 37.15 | 42.15 | 51.84 | 59.80 | 72.48 | 66.85 | h | 58.85 | 45.60 | 30.73 | 15.92 | 41.29 | a | |||||||||||
1976 | 12.81 | 24.09 | 33.00 | 46.15 | 57.18 | 61.88 | 73.06 | 66.98 | 61.09 | a | 44.94 | 32.98 | 22.42 | 44.71 | ||||||||||||
1977 | 19.87 | 30.57 | 34.34 | 50.23 | 54.45 | 69.38 | 70.82 | 69.02 | 60.45 | 47.82 | c | 33.48 | 28.21 | 47.39 | ||||||||||||
1978 | 20.94 | 21.37 | b | 39.81 | 48.46 | c | 53.84 | 65.30 | 71.79 | 68.22 | d | 58.80 | 49.45 | 29.90 | 5.32 | 44.43 | ||||||||||
1979 | 2.32 | 12.68 | 31.20 | a | 40.86 | p | 56.50 | 64.72 | 71.50 | 67.77 | 63.81 | c | 49.77 | 28.88 | 21.35 | 42.77 | a | |||||||||
1980 | 22.26 | 23.62 | 36.63 | 47.07 | 55.55 | 64.95 | 72.12 | a | 66.77 | e | 58.16 | k | 47.65 | 34.50 | a | 31.48 | 45.69 | a | ||||||||
1981 | 28.74 | 31.70 | 40.15 | 52.48 | 56.98 | 67.43 | a | 72.39 | 70.17 | a | 63.92 | 47.53 | 33.45 | k | 28.35 | 50.89 | a | |||||||||
1982 | 15.37 | a | 25.91 | 38.77 | e | 43.17 | 55.89 | 62.78 | 71.84 | 71.74 | h | 61.50 | a | 44.06 | f | 31.58 | 22.54 | c | 42.93 | b | ||||||
1983 | 22.05 | 27.09 | 40.10 | 41.36 | b | 53.55 | b | 64.55 | a | 70.15 | e | 73.35 | a | 63.35 | d | 50.79 | 33.98 | b | 15.74 | 46.34 | ||||||
1984 | 3.10 | 8.90 | 31.52 | 44.97 | 59.48 | 63.48 | 73.24 | 71.02 | 60.73 | 44.95 | a | 33.15 | 17.11 | 42.64 | ||||||||||||
1985 | 6.48 | 8.11 | a | 32.37 | 50.82 | 58.84 | 66.83 | 72.66 | 69.75 | a | 56.84 | a | 49.13 | a | 33.88 | a | 15.77 | 43.46 | ||||||||
1986 | 14.98 | a | 33.43 | 44.97 | a | 48.35 | 56.03 | 69.21 | a | 69.89 | 70.84 | 57.52 | b | 48.17 | a | 36.47 | 25.98 | c | 47.99 | |||||||
1987 | 21.03 | a | 32.06 | a | 36.87 | 50.48 | 59.48 | b | 67.40 | 70.15 | a | 67.57 | b | 60.20 | 51.44 | 36.33 | 22.23 | 47.94 | ||||||||
1988 | 8.05 | 19.12 | 36.43 | a | 49.02 | b | 57.10 | a | 69.86 | a | 73.83 | a | 70.54 | c | 59.07 | 53.12 | b | 34.97 | a | 19.72 | a | 45.90 | ||||
1989 | 8.29 | 14.25 | 40.32 | 51.70 | 58.48 | a | 65.38 | 74.50 | a | 68.77 | a | 60.59 | a | 49.52 | a | 36.53 | a | 25.05 | 46.12 | |||||||
1990 | 25.42 | 22.65 | a | 41.70 | a | 53.20 | 56.85 | a | 67.20 | 72.32 | c | 69.15 | a | 65.57 | a | 48.35 | 34.37 | 11.42 | 47.35 | |||||||
1991 | 9.10 | 22.52 | a | 38.43 | a | 45.67 | c | 56.95 | b | 65.09 | a | 71.33 | b | 69.98 | 60.93 | a | 48.29 | 33.53 | 20.94 | 45.23 | ||||||
1992 | 13.00 | 29.02 | a | 42.71 | 53.35 | 60.92 | a | 65.64 | a | 68.16 | 69.48 | a | 60.95 | b | 51.17 | a | 32.65 | 16.26 | 46.94 | |||||||
1993 | 13.73 | 19.62 | 34.21 | 46.98 | 58.45 | a | 63.31 | a | 66.53 | 67.25 | a | 59.31 | a | 47.35 | 29.57 | 24.45 | 44.23 | |||||||||
1994 | 27.16 | 27.21 | 42.16 | 50.40 | 60.40 | a | 69.00 | a | 73.18 | 72.35 | a | 61.88 | 48.48 | 30.72 | 27.58 | 49.21 | ||||||||||
1995 | 27.68 | 36.00 | a | 42.44 | 46.42 | 53.17 | a | 62.64 | a | 69.44 | 71.13 | 61.28 | 46.97 | a | 37.76 | a | 28.23 | 48.59 | ||||||||
1996 | 22.35 | a | 28.27 | a | 39.97 | a | 47.57 | 58.32 | 67.33 | 74.13 | 70.16 | 58.82 | 46.34 | 35.45 | 26.02 | 47.89 | ||||||||||
1997 | 18.90 | 21.25 | 37.92 | 44.50 | a | 59.63 | 68.32 | 71.05 | 70.95 | b | 63.26 | a | 48.75 | a | 35.14 | b | 21.87 | 46.79 | ||||||||
1998 | 29.15 | 33.98 | 40.12 | a | 47.40 | 59.27 | a | 63.58 | 75.79 | 72.45 | 66.29 | b | 50.79 | 37.98 | a | 19.61 | 49.70 | |||||||||
1999 | 26.10 | 33.96 | 43.17 | a | 47.27 | 56.68 | 66.09 | a | 74.42 | 71.40 | 60.15 | c | 49.85 | 37.84 | a | 25.20 | a | 49.34 | ||||||||
2000 | 29.39 | 34.07 | 41.02 | 52.50 | a | 60.71 | 68.18 | 73.79 | 74.03 | a | 61.02 | c | 50.63 | 30.28 | a | 26.97 | a | 50.21 | ||||||||
2001 | 24.02 | 31.66 | 43.87 | 50.57 | a | 61.02 | 68.90 | 74.65 | 73.81 | 65.48 | 50.71 | 38.90 | 14.16 | 49.81 | ||||||||||||
2002 | 16.31 | 23.09 | 35.63 | 50.30 | 58.39 | 69.37 | 76.25 | a | 69.47 | b | 60.95 | 46.34 | 31.29 | a | 19.20 | a | 46.38 | |||||||||
2003 | 18.74 | 27.59 | 41.13 | 49.22 | 59.40 | 67.11 | c | 76.71 | 73.21 | 60.69 | a | 52.13 | 31.75 | 24.97 | 48.55 | |||||||||||
2004 | 14.76 | 21.36 | 44.05 | a | 51.57 | 59.29 | 66.20 | 71.89 | 68.47 | 60.92 | 50.29 | 35.68 | 26.22 | a | 47.56 | |||||||||||
2005 | 29.10 | 32.54 | 40.62 | a | 48.53 | a | 58.20 | a | 64.33 | 74.43 | a | 69.52 | 60.62 | a | 51.48 | 36.80 | 24.31 | 49.21 | ||||||||
2006 | 25.89 | 29.93 | 38.29 | 50.73 | 60.39 | 70.08 | 76.29 | 70.40 | 57.82 | 47.81 | 35.97 | 20.81 | 48.70 | |||||||||||||
2007 | 3.21 | 25.19 | j | 42.94 | 50.82 | 59.03 | 69.20 | 76.39 | 72.90 | 62.08 | 48.92 | 36.80 | 9.16 | 48.31 | a | |||||||||||
2008 | 3.15 | 14.50 | 34.55 | 44.86 | a | 55.78 | b | 66.02 | 74.83 | a | 72.28 | b | 60.68 | 49.48 | 38.40 | 19.60 | 44.51 | |||||||||
2009 | 14.21 | 27.07 | 41.06 | 48.42 | 60.58 | 64.40 | 74.69 | 70.39 | 64.74 | a | 47.07 | a | 35.35 | 6.87 | 46.24 | |||||||||||
2010 | 10.40 | a | 15.70 | 37.69 | b | 48.33 | 53.35 | 67.80 | 73.97 | 69.77 | 62.87 | 51.55 | 34.28 | 29.37 | a | 46.26 | ||||||||||
2011 | 8.82 | 17.59 | 39.95 | b | 48.25 | 54.21 | 65.93 | 73.63 | a | 73.40 | b | 64.60 | a | 49.24 | 34.03 | 21.03 | b | 45.89 | ||||||||
2012 | 25.33 | a | 31.52 | 44.35 | 52.24 | a | 60.70 | a | 70.12 | a | 74.40 | 73.02 | 63.53 | a | 49.79 | 37.90 | 20.39 | 50.27 | ||||||||
2013 | 1.03 | 13.93 | 37.24 | 45.93 | 57.16 | i | 67.98 | 75.71 | 71.16 | b | 62.22 | a | 45.34 | b | 34.44 | d | 2.94 | e | 41.63 | a | ||||||
2014 | 12.83 | b | 29.76 | c | 40.42 | 46.95 | 57.18 | 67.02 | 75.82 | 69.69 | 63.85 | 50.50 | a | 34.66 | h | 28.87 | e | 49.35 | a | |||||||
2015 | 25.90 | a | 36.34 | 43.56 | d | 52.55 | s | 56.27 | 71.40 | 72.00 | 71.42 | 63.67 | 53.85 | 34.02 | 15.14 | b | 49.41 | a | ||||||||
2016 | 14.43 | b | 25.59 | 42.33 | a | 50.00 | b | 54.90 | 70.66 | b | 72.23 | a | 69.08 | 60.74 | a | 49.56 | d | 39.02 | 24.36 | b | 47.74 | |||||
2017 | 17.13 | a | 29.80 | 44.53 | 47.39 | b | 55.05 | a | 68.35 | g | 75.03 | 70.53 | 61.35 | 44.23 | 38.17 | 26.39 | 46.33 | a | ||||||||
2018 | 25.27 | 30.79 | 39.71 | 49.30 | b | 61.50 | a | 69.57 | 76.56 | 71.15 | 63.45 | 46.90 | 30.33 | c | 21.74 | 48.86 | ||||||||||
2019 | 13.77 | a | 12.68 | 32.79 | 49.63 | 52.87 | 63.42 | 73.81 | 72.11 | 62.78 | 40.82 | 33.62 | a | 25.61 | 44.49 | |||||||||||
2020 | 14.92 | 22.36 | 41.73 | a | 47.73 | 60.23 | 67.88 | 73.43 | a | 73.50 | 61.02 | 48.19 | 35.20 | 17.15 | a | 46.95 | ||||||||||
2021 | 14.07 | a | 26.34 | 38.85 | 48.42 | x | 59.98 | g | 70.62 | 77.02 | 70.35 | 63.60 | 47.44 | 38.72 | 26.24 | 47.32 | b | |||||||||
2022 | 26.44 | 26.11 | 40.00 | 47.67 | 55.37 | 68.10 | a | 75.87 | 74.11 | 65.87 | 49.58 | 31.78 | 14.89 | 47.98 | ||||||||||||
2023 | 13.95 | 7.12 | 26.87 | 45.13 | 59.94 | 65.32 | 74.97 | 72.32 | 62.83 | 49.10 | 35.02 | 26.56 | 44.93 | |||||||||||||
2024 | 27.35 | 35.19 | 40.63 | 49.22 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.39 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 16.24 | 23.64 | 37.57 | 47.84 | 57.31 | 65.86 | 72.79 | 70.19 | 61.02 | 48.47 | 34.03 | 20.93 | 46.26 | |||||||||||||
S.D. | 7.97 | 8.12 | 4.42 | 2.87 | 2.51 | 2.72 | 2.16 | 2.02 | 2.56 | 2.41 | 3.11 | 6.03 | 2.03 | |||||||||||||
SKEW | -0.17 | -0.46 | -0.69 | -0.22 | -0.16 | -0.08 | -0.15 | -0.08 | -0.44 | -0.59 | -0.33 | -0.68 | -0.04 | |||||||||||||
MAX | 29.39 | 36.34 | 44.97 | 53.35 | 61.82 | 71.40 | 77.02 | 74.11 | 66.29 | 54.50 | 39.93 | 31.48 | 50.27 | |||||||||||||
MIN | -0.10 | 4.76 | 24.94 | 40.97 | 51.84 | 59.53 | 66.53 | 64.34 | 53.24 | 40.82 | 25.93 | 2.94 | 41.64 | |||||||||||||
YRS | 85 | 84 | 85 | 80 | 82 | 83 | 83 | 82 | 82 | 84 | 83 | 85 | 71 |