YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 57.85 | 62.97 | 70.74 | 72.48 | ----- | z | 52.24 | 34.13 | 30.58 | 54.43 | e | |||||||
1930 | 12.21 | 32.36 | 42.56 | 53.15 | 56.39 | 61.30 | 72.40 | 73.13 | 61.27 | 46.10 | 33.75 | 25.30 | a | 47.49 | ||||||||||||
1931 | 29.68 | 30.20 | 40.26 | 49.25 | 59.94 | 61.34 | b | ----- | z | 70.35 | ----- | z | ----- | z | 34.08 | f | 24.85 | 45.73 | d | |||||||
1932 | 21.46 | d | 26.30 | b | 38.23 | 49.78 | 55.44 | 66.48 | 66.18 | 68.61 | 60.55 | b | 48.29 | b | 36.20 | h | 21.04 | d | 47.49 | a | ||||||
1933 | 24.28 | f | 18.65 | a | 38.37 | 48.43 | 51.84 | 64.30 | 71.90 | 71.53 | 55.65 | 50.27 | a | 36.07 | b | 31.00 | 48.91 | a | ||||||||
1934 | 31.08 | 39.02 | 43.56 | 55.43 | b | 59.82 | a | 66.33 | 69.82 | 72.84 | ----- | z | ----- | z | 39.74 | a | 28.89 | 50.65 | b | |||||||
1935 | 27.18 | a | 33.80 | 36.50 | a | 45.75 | ----- | z | ----- | z | 74.88 | b | 69.53 | 65.45 | 46.32 | 31.32 | b | 28.98 | 45.97 | b | ||||||
1936 | 26.39 | 11.91 | 37.98 | 51.85 | 61.45 | 64.42 | 71.45 | 70.03 | 60.40 | 53.85 | 32.33 | a | 30.13 | a | 47.68 | |||||||||||
1937 | 8.11 | 23.81 | b | 41.89 | 46.12 | a | 57.68 | 62.57 | 72.06 | 65.15 | 63.68 | 52.23 | 38.73 | 31.61 | 46.97 | |||||||||||
1938 | 28.89 | 31.19 | b | 39.39 | 50.93 | 58.00 | 68.48 | 76.05 | 69.48 | 68.45 | a | 51.72 | a | 32.52 | 28.79 | c | 50.32 | |||||||||
1939 | 29.79 | 25.92 | b | 39.73 | 51.27 | b | 57.19 | b | 59.83 | a | 72.45 | 73.91 | b | 62.25 | 48.35 | 38.35 | 34.07 | b | 49.43 | |||||||
1940 | 27.92 | 32.88 | 43.20 | a | 48.65 | 59.32 | 67.86 | a | 71.31 | 69.56 | 64.21 | b | 50.72 | a | 29.18 | b | 30.11 | 49.58 | ||||||||
1941 | 30.50 | a | 36.16 | 45.40 | 51.80 | 54.68 | 61.89 | b | 75.48 | 67.58 | a | 54.17 | 46.75 | a | 39.53 | 30.78 | d | 49.56 | ||||||||
1942 | 23.35 | 31.88 | 39.87 | a | 49.90 | 54.32 | a | 60.45 | a | 72.21 | 73.84 | 65.20 | 51.06 | 32.17 | 27.74 | 48.50 | ||||||||||
1943 | 19.02 | c | 30.15 | b | 36.20 | d | 51.95 | b | 52.83 | a | 59.53 | 71.13 | 68.06 | 65.00 | 50.16 | 36.64 | a | 27.65 | 47.36 | |||||||
1944 | 25.20 | c | 30.45 | 37.71 | 49.55 | b | 58.24 | 64.46 | b | 72.24 | 69.13 | 64.68 | 56.35 | 34.98 | 26.23 | 49.10 | ||||||||||
1945 | 29.38 | a | 34.95 | 38.32 | 45.70 | 58.13 | 62.73 | 72.56 | 70.87 | 58.97 | 51.39 | 32.88 | 28.60 | 48.71 | ||||||||||||
1946 | 27.25 | a | 30.84 | 41.11 | 48.84 | a | 60.84 | 61.39 | b | 70.89 | 71.55 | a | 59.38 | a | 43.76 | 32.05 | b | 31.03 | a | 48.24 | ||||||
1947 | 24.83 | e | ----- | z | 44.07 | a | 50.22 | a | 62.74 | 62.40 | 69.38 | c | 67.45 | a | 62.70 | 48.38 | b | 36.10 | a | 29.16 | 50.68 | a | ||||
1948 | 24.38 | c | 26.69 | 37.82 | 44.00 | 52.47 | b | 67.03 | a | 66.60 | a | 66.09 | c | 60.02 | 48.21 | 35.23 | 20.05 | 45.72 | ||||||||
1949 | 7.95 | 21.77 | 39.84 | 51.50 | h | 61.96 | c | 64.77 | b | 66.94 | v | 67.67 | h | 63.28 | 46.34 | ----- | z | ----- | z | 43.70 | e | |||||
1950 | 7.29 | l | ----- | z | ----- | z | 45.58 | e | 54.65 | 62.91 | c | 72.05 | 71.45 | 63.83 | 46.69 | 35.27 | b | 33.15 | 53.95 | c | ||||||
1951 | 24.76 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.92 | 47.15 | 34.83 | a | 23.52 | a | 42.10 | h | ||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.42 | a | 32.87 | 29.60 | 39.29 | i | ||
1953 | 35.11 | 35.87 | a | 40.90 | 46.55 | 53.24 | 58.35 | 71.60 | 68.79 | 62.19 | a | 50.98 | 39.45 | a | 31.98 | 49.59 | ||||||||||
1954 | 24.57 | c | 32.05 | f | ----- | z | ----- | z | ----- | z | ----- | z | 68.00 | 64.60 | a | 61.14 | a | 46.84 | 41.90 | a | 27.84 | 47.84 | e | |||
1955 | 26.77 | c | ----- | z | ----- | z | 39.83 | x | 51.62 | a | 64.80 | 68.50 | 69.18 | 62.55 | 49.02 | 28.50 | b | 23.97 | 49.43 | c | ||||||
1956 | 26.85 | 19.14 | a | 34.31 | 51.55 | 61.55 | 60.98 | 73.35 | 72.37 | 62.88 | 48.06 | 33.58 | 29.42 | 47.84 | ||||||||||||
1957 | 13.03 | b | 25.02 | a | 38.83 | a | 48.32 | 60.76 | 65.12 | 68.89 | 66.56 | 65.02 | 47.23 | a | 36.45 | 33.19 | 47.37 | |||||||||
1958 | 32.55 | 41.30 | 39.98 | 46.25 | 63.56 | 69.08 | 76.10 | 75.00 | 59.87 | 50.58 | 34.05 | a | 30.32 | 51.55 | ||||||||||||
1959 | 28.03 | 28.87 | a | 39.73 | 48.67 | 52.77 | 62.80 | 72.98 | 67.03 | a | 57.90 | a | 47.13 | 31.82 | 30.23 | 47.33 | ||||||||||
1960 | 21.84 | 32.91 | 39.77 | 47.10 | 52.77 | 65.22 | 76.85 | 66.42 | 63.43 | 50.63 | 36.97 | 27.38 | a | 48.44 | ||||||||||||
1961 | 28.76 | 37.25 | 41.05 | 47.15 | 54.87 | 69.08 | 74.44 | 76.31 | 57.42 | 46.71 | 32.45 | 25.63 | 49.26 | |||||||||||||
1962 | 21.87 | 32.89 | 36.42 | l | 50.98 | h | 51.52 | 64.30 | 70.50 | 67.33 | h | 62.90 | 49.09 | c | 38.96 | b | 33.25 | a | 47.25 | c | ||||||
1963 | 20.52 | b | 35.63 | b | 41.76 | 45.50 | g | 55.33 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.45 | i | 38.31 | h | |
1964 | 27.71 | j | 30.16 | g | ----- | z | 48.04 | d | 55.73 | a | ----- | z | ----- | z | ----- | z | 58.48 | 50.32 | a | 35.71 | a | 23.67 | g | 49.66 | g | |
1965 | 28.28 | b | 30.75 | 37.24 | b | 50.83 | ----- | z | 63.96 | b | 71.00 | a | 68.48 | j | 56.80 | c | ----- | z | 40.21 | b | 29.73 | e | 45.42 | c | ||
1966 | 24.90 | e | 30.82 | k | 40.26 | h | 48.07 | i | 58.50 | m | ----- | z | 67.25 | o | ----- | z | 65.42 | 49.16 | f | 39.86 | a | 32.84 | 40.76 | h | ||
1967 | 32.84 | 37.61 | 39.06 | 42.50 | e | 53.73 | 66.77 | 71.90 | 77.03 | a | 68.78 | 48.50 | 38.25 | 26.98 | b | 50.33 | ||||||||||
1968 | 28.92 | a | 38.00 | 43.07 | a | 46.07 | 57.53 | 64.73 | 74.37 | 65.89 | 61.95 | 46.11 | 37.68 | 26.83 | b | 49.26 | ||||||||||
1969 | 14.98 | 26.98 | 39.03 | 48.20 | 59.40 | 68.83 | 69.68 | 66.50 | e | 61.23 | 45.97 | 36.62 | 29.98 | c | 47.28 | |||||||||||
1970 | 25.95 | b | 36.55 | 39.92 | 44.18 | 56.71 | 69.03 | 72.50 | 71.61 | 56.65 | 46.77 | 35.57 | 24.74 | 48.35 | ||||||||||||
1971 | 26.29 | b | 32.77 | 35.52 | 47.57 | a | 58.45 | a | 59.13 | 72.73 | 74.18 | 55.27 | d | 45.89 | 35.90 | a | 22.34 | 47.17 | ||||||||
1972 | 21.33 | a | 30.38 | 42.53 | 43.63 | 58.58 | 64.62 | b | 69.40 | 72.29 | 56.35 | 47.66 | 38.41 | a | 24.00 | 47.43 | ||||||||||
1973 | 25.05 | a | 33.20 | 42.94 | 49.85 | 58.63 | 66.32 | k | 72.71 | 69.60 | 62.40 | 47.60 | a | 33.98 | 33.68 | a | 48.15 | a | ||||||||
1974 | 24.47 | 35.25 | 40.10 | 48.68 | 53.26 | 66.72 | 68.69 | 70.97 | 65.67 | 51.11 | 37.98 | 31.16 | 49.50 | |||||||||||||
1975 | 23.39 | 26.10 | b | 36.11 | 44.43 | 55.85 | 62.48 | 75.62 | c | 66.39 | 65.38 | 48.40 | 35.77 | 29.45 | a | 47.45 | ||||||||||
1976 | 27.40 | a | 32.24 | 36.76 | 47.48 | 55.84 | 60.08 | 69.34 | 66.19 | 66.52 | 49.71 | 36.88 | 28.85 | 48.11 | ||||||||||||
1977 | 21.44 | 35.84 | 39.50 | 54.58 | 52.94 | 68.07 | a | 70.73 | 75.78 | a | 57.90 | 49.32 | 34.40 | 28.35 | 49.07 | |||||||||||
1978 | 29.21 | 35.37 | b | 44.13 | 48.52 | 54.57 | a | 66.02 | 71.26 | 69.39 | 59.68 | 50.27 | 30.03 | 20.98 | 48.29 | |||||||||||
1979 | 14.31 | b | 30.39 | a | 43.65 | a | 48.03 | 59.13 | 66.95 | 73.58 | a | 71.86 | b | 65.97 | 53.38 | a | 31.45 | 33.90 | a | 49.38 | ||||||
1980 | 20.71 | 31.72 | 39.85 | 52.45 | a | 56.77 | c | 59.67 | 70.55 | 66.97 | 61.75 | 51.56 | 38.98 | 31.82 | a | 48.57 | ||||||||||
1981 | 36.26 | b | 34.91 | 44.45 | 47.00 | 55.40 | 59.40 | a | 68.40 | 73.77 | 62.72 | a | 47.58 | 39.15 | 28.68 | 49.81 | ||||||||||
1982 | 24.98 | h | 31.28 | e | 40.52 | i | 43.20 | e | 56.78 | f | 67.10 | f | 68.72 | h | 69.09 | i | 60.88 | f | 47.69 | j | 28.17 | l | 25.62 | n | 37.24 | j |
1983 | 32.79 | g | 37.37 | a | 43.25 | a | 47.89 | c | 58.58 | e | 62.11 | c | 66.38 | b | 72.78 | f | 60.25 | b | 50.31 | b | 40.13 | c | 20.60 | b | 48.69 | b |
1984 | 27.88 | c | 34.00 | a | 43.07 | b | 45.63 | 50.74 | b | 60.74 | c | 71.66 | 69.85 | 58.12 | a | 45.48 | b | 35.93 | b | 14.50 | 46.47 | |||||
1985 | 20.98 | 23.20 | 35.47 | 49.15 | 59.23 | a | 64.40 | d | 78.24 | 66.66 | 56.19 | a | 43.88 | c | 21.02 | a | 20.34 | c | 44.90 | |||||||
1986 | 29.02 | d | 29.88 | b | 44.40 | 46.09 | c | 57.04 | f | 70.18 | b | 67.12 | b | 76.69 | 58.30 | b | 53.05 | a | 35.04 | b | 28.37 | 48.92 | a | |||
1987 | 26.16 | c | 34.95 | 44.29 | b | 53.10 | a | 58.69 | d | 67.29 | d | 69.00 | f | 70.11 | c | 66.85 | d | 53.41 | c | 40.12 | b | 29.82 | f | 51.50 | b | |
1988 | 24.84 | 34.77 | a | 41.21 | 50.86 | b | 55.36 | c | 62.20 | 71.75 | a | 70.65 | a | 61.65 | d | 56.92 | 37.31 | c | 27.90 | a | 49.62 | |||||
1989 | 28.80 | a | 25.60 | b | 37.89 | 53.53 | 56.23 | a | 66.21 | a | 67.66 | b | 66.68 | a | 63.23 | 49.82 | a | 37.85 | ----- | z | 50.32 | a | ||||
1990 | 33.11 | 30.17 | a | 43.83 | a | 52.91 | a | 54.50 | a | 62.69 | a | 75.67 | b | 72.34 | 68.21 | b | 47.47 | 36.05 | i | 23.47 | a | 51.31 | a | |||
1991 | 24.93 | a | 41.39 | a | 40.36 | c | 49.18 | 54.79 | 59.57 | c | 71.89 | c | 72.60 | 68.40 | 49.65 | a | 36.68 | b | 34.09 | b | 50.29 | |||||
1992 | ----- | z | 40.64 | 48.37 | 50.47 | 60.69 | b | 70.06 | d | 71.39 | h | 73.63 | a | 60.08 | 53.50 | a | 37.05 | b | 22.70 | a | 51.72 | b | ||||
1993 | 20.86 | b | 26.76 | a | 39.00 | 47.98 | 63.45 | a | 63.09 | b | 64.55 | 68.47 | a | 62.67 | 53.47 | 31.10 | a | 30.48 | a | 47.66 | ||||||
1994 | 33.84 | ----- | z | 45.63 | 52.45 | ----- | z | 62.84 | b | 77.35 | 70.03 | b | 67.08 | 50.66 | 33.33 | 32.00 | d | 52.52 | b | |||||||
1995 | 28.98 | a | 39.56 | a | 43.08 | 48.28 | a | 58.81 | b | 60.55 | k | 70.98 | j | ----- | z | 64.33 | i | 47.29 | 39.22 | 30.73 | a | 41.99 | d | |||
1996 | 23.60 | b | 31.08 | c | 40.02 | 49.00 | 51.82 | a | 62.18 | e | 74.60 | f | 71.53 | 56.70 | h | 48.65 | 32.67 | 25.09 | h | 45.62 | c | |||||
1997 | 27.64 | c | 28.67 | g | 38.37 | a | 46.00 | b | 59.66 | 62.83 | a | ----- | z | 72.55 | 63.63 | d | 47.88 | e | ----- | z | ----- | z | 52.32 | d | ||
1998 | 28.87 | 38.81 | g | 42.18 | i | 49.27 | 58.58 | a | 63.75 | d | 77.70 | c | ----- | z | 68.59 | a | 49.26 | 40.02 | a | 27.82 | k | 54.50 | d | |||
1999 | 32.60 | b | 35.29 | i | 40.62 | b | 46.82 | b | 52.58 | e | 60.61 | b | 70.33 | k | 72.60 | a | 61.19 | a | 48.90 | 42.05 | a | 36.05 | l | 50.89 | c | |
2000 | 27.24 | b | 31.10 | 40.05 | i | 51.30 | b | 53.70 | a | 63.59 | a | 69.37 | a | 68.92 | 60.77 | 48.47 | 30.63 | 24.33 | a | 48.13 | a | |||||
2001 | ----- | z | 27.25 | 39.58 | a | 45.83 | a | 58.05 | a | 61.43 | h | 68.26 | j | 72.10 | 66.00 | 48.52 | b | 40.86 | a | ----- | z | 49.77 | d | |||
2002 | 30.85 | k | 34.77 | f | 37.28 | a | 48.00 | d | 53.84 | 62.71 | b | 72.97 | a | 69.52 | 61.88 | a | 47.43 | a | 38.31 | a | 32.92 | r | 54.66 | c | ||
2003 | 33.26 | 37.00 | b | 42.26 | 47.85 | 56.23 | i | 67.09 | h | 74.38 | f | 71.74 | j | 64.20 | h | 54.12 | g | ----- | z | 30.80 | u | 40.09 | h | |||
2004 | 26.45 | k | 31.50 | h | 45.52 | h | 54.19 | i | 57.33 | k | 65.42 | k | 76.80 | p | 73.39 | h | 60.16 | h | 51.55 | j | 38.55 | j | 29.57 | x | ----- | z |
2005 | 28.15 | k | 35.53 | l | 44.77 | k | 51.48 | i | 59.47 | n | ----- | 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 | 36.33 | r | 30.65 | 30.65 | k | |
2013 | 23.75 | q | 34.81 | l | 39.95 | j | 44.97 | a | 58.12 | o | 63.00 | p | 75.11 | c | 72.72 | d | 63.60 | 47.85 | 35.88 | 24.18 | 52.04 | e | ||||
2014 | 29.58 | a | 27.94 | d | 40.92 | 48.35 | 57.45 | 64.32 | 76.32 | 74.37 | 63.87 | 53.23 | a | 35.23 | 33.06 | 50.39 | ||||||||||
2015 | 28.98 | d | 40.39 | a | 46.17 | a | 47.68 | 59.62 | e | 72.09 | a | 74.10 | e | 71.86 | c | 59.33 | a | 56.06 | o | 34.76 | a | 29.07 | a | 51.28 | a | |
2016 | 29.05 | 37.75 | c | 42.92 | 55.29 | d | 58.80 | d | 75.30 | y | 67.96 | f | 71.31 | o | 58.38 | q | 48.21 | 43.42 | 21.73 | a | 42.15 | d | ||||
2017 | 19.44 | 26.72 | a | 38.52 | a | 45.88 | a | 54.38 | j | 63.55 | b | 72.67 | b | 74.24 | h | 63.94 | f | 46.27 | c | 36.00 | c | 25.64 | b | 41.63 | c | |
2018 | 31.95 | a | 31.40 | d | 38.62 | k | 46.09 | b | 62.61 | c | 64.38 | e | 73.50 | g | 72.68 | l | 58.88 | 48.44 | 37.07 | 31.52 | 45.81 | c | ||||
2019 | 31.47 | 21.64 | 33.69 | 48.70 | 58.39 | 63.45 | 69.11 | 72.61 | 59.50 | 42.55 | 36.22 | 30.68 | 47.33 | |||||||||||||
2020 | 31.40 | 35.41 | 39.61 | 47.55 | 56.26 | 62.16 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.40 | f | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.84 | 31.52 | 40.46 | 48.58 | 56.88 | 64.01 | 71.80 | 70.51 | 62.04 | 49.17 | 35.78 | 28.09 | 48.46 | |||||||||||||
S.D. | 5.84 | 5.78 | 2.97 | 2.86 | 3.19 | 3.05 | 3.00 | 3.00 | 3.50 | 2.84 | 3.64 | 4.09 | 1.37 | |||||||||||||
SKEW | -1.06 | -0.75 | 0.12 | 0.30 | 0.07 | 0.43 | -0.00 | 0.06 | -0.07 | 0.47 | -0.86 | -0.83 | -0.21 | |||||||||||||
MAX | 36.26 | 41.39 | 48.37 | 55.43 | 63.56 | 72.09 | 78.24 | 77.03 | 68.78 | 56.92 | 43.42 | 34.09 | 51.55 | |||||||||||||
MIN | 7.95 | 11.91 | 33.69 | 42.50 | 50.74 | 58.35 | 64.55 | 64.60 | 54.17 | 42.55 | 21.02 | 14.50 | 44.90 | |||||||||||||
YRS | 71 | 68 | 69 | 74 | 71 | 69 | 64 | 66 | 71 | 74 | 74 | 70 | 41 |