YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.47 | o | 54.03 | 35.00 | a | 26.67 | a | 38.57 | i | |
1927 | 19.48 | 34.96 | a | 42.62 | b | 49.38 | a | 61.03 | 73.53 | 80.77 | 73.87 | 82.69 | a | ----- | z | 37.03 | a | 13.93 | a | 51.76 | a | |||||
1928 | 26.50 | a | 18.61 | a | 28.61 | 47.30 | 73.90 | 75.66 | a | 79.84 | 80.55 | 75.88 | v | 57.10 | 44.63 | 33.90 | 51.51 | a | ||||||||
1929 | 6.80 | a | 11.50 | 37.71 | 51.37 | 63.23 | 73.97 | 81.77 | 78.58 | 64.27 | 56.71 | 34.75 | b | 24.27 | a | 48.74 | ||||||||||
1930 | 14.00 | 34.00 | 37.58 | 55.10 | 63.16 | 78.90 | 78.07 | a | 80.90 | 70.47 | 53.87 | 43.67 | 29.84 | 53.30 | ||||||||||||
1931 | 30.74 | 34.36 | 34.03 | 54.87 | 64.71 | 78.33 | 82.17 | a | 72.94 | 73.37 | 59.29 | 45.47 | 33.34 | b | 55.30 | |||||||||||
1932 | 27.40 | a | 24.36 | a | 26.37 | a | 51.59 | a | 62.77 | 66.23 | 76.61 | 76.84 | 66.13 | 48.29 | 32.97 | 20.32 | 48.32 | |||||||||
1933 | 29.45 | 18.88 | b | 30.52 | 39.73 | 56.23 | 79.97 | 79.06 | 80.83 | a | 76.23 | 52.65 | 36.00 | 26.28 | b | 50.49 | ||||||||||
1934 | 29.13 | 23.18 | 36.68 | c | 52.13 | 74.45 | 79.62 | a | 83.84 | 81.97 | 70.33 | 62.84 | ----- | z | 24.20 | a | 56.22 | a | ||||||||
1935 | 20.40 | a | 31.79 | 39.61 | 50.37 | 63.26 | 72.82 | b | 85.03 | 78.97 | 67.63 | 57.29 | 34.14 | b | 28.81 | 52.51 | ||||||||||
1936 | 26.62 | o | 15.28 | d | 37.52 | 46.17 | a | 71.03 | 71.69 | a | 90.52 | j | 79.96 | e | 76.03 | a | 56.37 | a | 38.14 | b | 30.70 | a | 52.29 | b | ||
1937 | 21.27 | a | 27.68 | 33.55 | 48.17 | ----- | z | 76.60 | 86.41 | n | 83.94 | 70.72 | a | 51.70 | a | 39.45 | a | 26.37 | a | 47.94 | b | |||||
1938 | 22.65 | 29.65 | b | 47.42 | 54.17 | 65.23 | 74.70 | 79.74 | 80.12 | n | 68.00 | 63.30 | a | 37.97 | 24.35 | 51.56 | a | |||||||||
1939 | 26.48 | ----- | z | 37.63 | a | 50.27 | 71.03 | b | 75.90 | a | 82.05 | k | 77.84 | f | 74.08 | d | 49.64 | i | 45.63 | 35.13 | 52.02 | d | ||||
1940 | 19.20 | a | 28.69 | 32.06 | 50.97 | 60.77 | 73.73 | 80.23 | 74.94 | 72.80 | 60.16 | 36.93 | 29.03 | 51.63 | ||||||||||||
1941 | 26.16 | 27.32 | 35.87 | 61.63 | 72.39 | 77.20 | 81.33 | a | 76.80 | a | 71.73 | 58.52 | 42.77 | 34.55 | 55.52 | |||||||||||
1942 | 28.97 | a | 27.25 | 42.45 | b | 66.00 | e | 64.71 | ----- | z | ----- | z | 89.87 | a | 77.61 | b | ----- | z | 52.18 | h | 29.96 | d | 53.35 | d | ||
1943 | 28.59 | i | 31.75 | 31.12 | g | 51.43 | g | 64.38 | e | 83.20 | t | 85.76 | b | 78.23 | 66.33 | 59.97 | a | 35.30 | 29.87 | 56.45 | d | |||||
1944 | 33.74 | 30.10 | 34.71 | 49.90 | 69.48 | 77.50 | 78.52 | 79.61 | 67.73 | 61.77 | 44.30 | 26.29 | 54.47 | |||||||||||||
1945 | 20.57 | a | 29.44 | a | 49.30 | a | 48.80 | 60.90 | 69.93 | b | 77.06 | 77.48 | 69.10 | a | 60.87 | 40.47 | 25.03 | 52.41 | ||||||||
1946 | 27.20 | a | 22.54 | 49.27 | a | 55.73 | 68.00 | 74.17 | a | 81.26 | 75.32 | 71.07 | 62.90 | a | 45.03 | 28.73 | a | 55.10 | ||||||||
1947 | 26.06 | 22.71 | 35.38 | b | 45.73 | 61.00 | a | 74.23 | d | 78.81 | 84.74 | 69.60 | 69.03 | 37.10 | 26.74 | 52.60 | ||||||||||
1948 | 19.90 | 24.34 | 38.35 | 58.67 | 67.52 | 73.00 | 79.93 | a | 81.29 | 75.80 | 61.97 | 41.60 | 27.65 | 54.17 | ||||||||||||
1949 | 27.32 | 24.93 | ----- | z | ----- | z | 72.00 | 80.97 | 80.77 | 78.62 | g | 66.57 | 61.39 | 40.33 | 27.58 | 53.54 | c | |||||||||
1950 | 20.58 | 29.35 | b | 32.58 | 39.83 | 64.19 | 76.50 | 76.42 | 74.32 | 68.57 | 64.40 | a | 35.23 | 21.65 | 50.30 | |||||||||||
1951 | 22.58 | 28.07 | 31.84 | 48.73 | 71.68 | 71.23 | 79.71 | 71.48 | 62.87 | 54.86 | b | 33.20 | 25.55 | 50.15 | ||||||||||||
1952 | 24.13 | 31.62 | 35.52 | 58.47 | 65.87 | 77.10 | 80.19 | 76.52 | 70.10 | 52.48 | 41.97 | 30.58 | 53.71 | |||||||||||||
1953 | 26.29 | 26.61 | 37.76 | b | 46.70 | 66.77 | ----- | z | ----- | z | ----- | z | ----- | z | 67.17 | m | 46.63 | 28.94 | 39.96 | e | ||||||
1954 | 20.48 | 37.29 | 34.52 | 53.63 | 58.42 | 77.71 | b | 79.00 | 75.06 | 64.33 | 53.23 | 40.77 | 28.81 | 51.94 | ||||||||||||
1955 | 21.55 | 25.32 | 33.65 | 61.27 | 72.58 | 75.50 | 84.16 | 80.26 | 68.63 | 58.48 | ----- | z | ----- | z | 58.14 | b | ||||||||||
1956 | ----- | z | ----- | z | ----- | z | 47.42 | r | 65.39 | 79.07 | 74.16 | 76.30 | a | 67.66 | a | 66.68 | 39.23 | 29.97 | 62.31 | d | ||||||
1957 | 16.65 | 28.93 | 37.03 | 55.03 | 66.48 | 69.15 | c | 81.76 | b | 74.48 | h | 66.90 | 57.24 | b | 38.85 | j | 29.81 | d | 50.90 | b | ||||||
1958 | 28.00 | i | 25.06 | j | 39.21 | c | 55.32 | e | 68.57 | a | 69.38 | d | 76.39 | c | 76.77 | 68.60 | 58.07 | a | 41.27 | 20.10 | 57.37 | b | ||||
1959 | 16.87 | 25.04 | 39.03 | 52.07 | 70.29 | 77.97 | a | 80.65 | 78.77 | 69.30 | 50.58 | 30.73 | 33.26 | 52.05 | ||||||||||||
1960 | 22.32 | 26.76 | 32.45 | 51.90 | 62.61 | 73.54 | b | 79.65 | 78.55 | 68.27 | 58.52 | ----- | z | 24.27 | e | 52.62 | a | |||||||||
1961 | 22.16 | 34.61 | 41.26 | 49.37 | 65.74 | 76.83 | 78.06 | 80.65 | 68.23 | 59.42 | 39.80 | 24.97 | 53.42 | |||||||||||||
1962 | 18.50 | a | 22.00 | 39.23 | 49.17 | 70.16 | 74.00 | 76.45 | 77.39 | 66.80 | 59.13 | a | 40.30 | 26.10 | 51.60 | |||||||||||
1963 | 13.33 | a | 20.71 | 41.48 | 56.83 | 65.74 | 77.97 | 82.06 | 75.57 | a | 70.53 | 69.27 | a | 44.90 | 19.80 | a | 53.18 | |||||||||
1964 | 29.97 | 31.55 | 35.77 | 54.30 | 72.39 | 76.30 | 84.03 | 74.23 | 66.17 | 56.74 | 42.17 | 22.10 | 53.81 | |||||||||||||
1965 | 19.19 | 22.43 | 30.19 | 50.86 | a | 69.26 | 73.77 | 76.45 | 75.74 | 60.17 | 58.06 | 37.67 | 29.97 | 50.31 | ||||||||||||
1966 | 15.58 | 26.36 | 40.74 | 47.70 | 62.32 | 78.00 | 82.19 | 75.10 | j | ----- | z | 57.19 | 36.53 | 25.03 | 47.17 | b | ||||||||||
1967 | 24.65 | 20.39 | 38.81 | 52.43 | 60.52 | 74.00 | 77.16 | 73.94 | 68.60 | 52.74 | 34.53 | 27.74 | 50.46 | |||||||||||||
1968 | 22.97 | 25.17 | 46.23 | 53.23 | 60.81 | 71.50 | 77.71 | 75.97 | 68.30 | 57.32 | 37.76 | a | 24.29 | 51.77 | ||||||||||||
1969 | 20.71 | 28.54 | 34.71 | 56.03 | 66.77 | 65.10 | 76.87 | 81.10 | 67.67 | 50.32 | 38.73 | 26.77 | 51.11 | |||||||||||||
1970 | 17.58 | 25.75 | 35.06 | 51.53 | 58.80 | a | 75.70 | 82.16 | 80.68 | 69.38 | a | 57.26 | 36.67 | 24.81 | 51.28 | |||||||||||
1971 | 15.29 | 22.68 | 34.26 | 52.87 | 58.81 | 77.21 | a | 76.00 | 75.10 | 68.77 | 59.97 | 38.07 | 25.65 | 50.39 | ||||||||||||
1972 | 15.58 | 19.97 | 30.87 | 46.10 | 70.90 | 73.10 | 76.58 | 74.45 | 66.17 | 49.84 | 35.03 | 19.16 | 48.15 | |||||||||||||
1973 | 26.00 | 28.11 | 43.42 | 49.90 | 58.94 | 75.43 | 78.94 | 77.87 | 66.40 | 61.71 | 37.87 | 24.65 | 52.44 | |||||||||||||
1974 | 20.23 | 24.89 | 34.10 | 51.33 | 60.77 | 70.40 | 81.35 | 74.45 | 60.76 | a | 54.61 | 40.47 | 30.97 | 50.36 | ||||||||||||
1975 | 23.55 | 26.00 | 32.90 | 45.27 | 71.19 | 73.73 | 81.90 | 77.94 | 64.10 | 59.32 | 45.20 | 24.42 | 52.13 | |||||||||||||
1976 | 18.42 | 33.07 | 35.00 | 55.97 | 64.94 | 79.87 | 82.42 | 79.97 | 68.50 | 50.52 | 32.30 | 17.13 | a | 51.51 | ||||||||||||
1977 | 11.16 | 29.29 | 42.71 | 57.17 | 77.36 | c | 74.86 | a | 81.08 | e | 71.37 | a | 65.29 | b | 56.13 | 39.13 | 23.68 | 52.43 | ||||||||
1978 | 18.42 | 23.29 | 38.52 | 49.03 | 67.45 | 74.25 | b | 75.40 | a | 77.00 | 69.70 | 55.13 | 38.97 | 21.32 | 50.71 | |||||||||||
1979 | 10.77 | 19.07 | 36.48 | 48.33 | 59.10 | 72.52 | a | 79.13 | a | 73.71 | 68.93 | 50.45 | 37.21 | a | 31.32 | 48.92 | ||||||||||
1980 | 21.55 | 24.41 | 33.77 | 53.93 | 72.18 | c | 72.31 | a | 80.06 | 76.07 | a | 65.27 | 50.48 | 40.20 | 22.48 | 51.06 | ||||||||||
1981 | 24.77 | 29.07 | ----- | z | 54.36 | b | 64.17 | a | 73.63 | 77.77 | 76.16 | 67.45 | a | 51.68 | 45.53 | 26.61 | 53.75 | a | ||||||||
1982 | 13.21 | b | 25.25 | 36.10 | a | 48.76 | a | 70.23 | 68.40 | 80.57 | a | 75.06 | 64.80 | 56.23 | 37.40 | 31.41 | b | 50.62 | ||||||||
1983 | 27.32 | 32.93 | 38.68 | 48.30 | 61.13 | 74.40 | 84.43 | a | 81.73 | a | 68.37 | 55.00 | 39.07 | 14.20 | a | 52.13 | ||||||||||
1984 | 19.29 | 35.52 | 32.16 | 55.03 | a | 61.81 | 75.90 | 78.77 | 79.10 | 64.69 | a | 59.73 | a | 39.45 | a | 25.94 | 52.28 | |||||||||
1985 | 18.87 | 21.96 | 42.84 | 55.59 | a | 68.47 | a | 72.40 | 78.65 | 73.06 | 66.90 | 56.61 | 32.37 | 15.68 | 50.28 | |||||||||||
1986 | 23.37 | a | 25.00 | 40.61 | 57.07 | 68.48 | 74.55 | a | 78.71 | 73.35 | 66.47 | 54.30 | a | 35.77 | 29.29 | 52.25 | ||||||||||
1987 | 27.63 | a | 38.04 | 46.04 | g | 65.50 | d | 69.19 | 79.67 | 81.29 | 77.61 | 70.90 | 50.06 | 43.57 | ----- | z | 60.35 | b | ||||||||
1988 | ----- | z | 22.76 | 37.26 | 53.73 | 76.00 | 80.50 | 85.55 | 79.68 | 68.60 | 50.65 | 38.63 | 27.63 | a | 56.45 | a | ||||||||||
1989 | 28.06 | 19.93 | a | 32.87 | 50.37 | 66.61 | 72.37 | 81.84 | 78.81 | 70.33 | 60.39 | 33.93 | 16.57 | a | 51.01 | |||||||||||
1990 | 32.03 | 29.39 | 42.71 | 56.57 | 63.10 | 76.27 | 79.32 | 78.45 | 69.37 | 54.48 | 42.70 | 24.63 | a | 54.09 | ||||||||||||
1991 | 17.00 | 30.36 | ----- | z | 54.62 | a | 67.32 | 75.40 | 75.45 | 78.06 | 62.73 | 51.68 | 31.47 | 26.03 | a | 51.83 | a | |||||||||
1992 | 25.53 | a | 29.21 | 36.06 | 44.67 | 67.87 | 69.40 | 69.94 | 71.68 | 65.21 | a | 53.68 | 33.47 | 26.48 | 49.43 | |||||||||||
1993 | 21.71 | 24.71 | 37.77 | 45.37 | 62.52 | 68.17 | 75.03 | 76.35 | 59.60 | 50.35 | 32.87 | 25.10 | 48.30 | |||||||||||||
1994 | 10.77 | 17.93 | 37.07 | a | 49.40 | 65.87 | 75.13 | 74.94 | 72.10 | a | 67.80 | 56.48 | 42.07 | 31.65 | 50.10 | |||||||||||
1995 | 21.74 | 23.39 | 37.65 | 43.40 | 63.58 | 77.47 | 77.16 | 79.00 | 65.80 | 52.65 | 27.97 | 22.17 | a | 49.33 | ||||||||||||
1996 | 16.42 | 21.28 | 27.77 | 43.90 | 60.87 | 72.79 | a | 71.71 | 76.84 | 64.97 | 54.26 | 29.97 | 22.06 | 46.90 | ||||||||||||
1997 | 17.42 | 26.64 | 32.87 | 48.83 | a | 56.35 | 77.60 | 76.13 | 71.71 | 68.52 | a | 55.90 | 33.87 | 31.81 | 49.80 | |||||||||||
1998 | 23.94 | 39.14 | 35.81 | 56.53 | 71.45 | 71.17 | 78.03 | 78.77 | 73.20 | 57.77 | 41.27 | 31.00 | 54.84 | |||||||||||||
1999 | 18.61 | 33.75 | 40.61 | 53.80 | 67.87 | 73.63 | 80.32 | 74.31 | b | 67.93 | 53.16 | 47.07 | 29.71 | 53.40 | ||||||||||||
2000 | 22.52 | 33.28 | 45.94 | 49.60 | 67.87 | 70.43 | 74.84 | 76.07 | b | 66.43 | 60.45 | 38.24 | a | 15.42 | 51.76 | |||||||||||
2001 | 27.81 | 20.96 | 36.19 | 52.63 | 66.87 | 74.20 | 78.26 | 79.65 | 66.10 | 54.58 | 51.53 | 31.68 | 53.37 | |||||||||||||
2002 | 28.55 | 32.39 | 30.26 | 47.97 | 59.13 | 73.53 | 82.13 | 75.29 | 69.57 | 45.87 | 35.53 | 28.71 | 50.74 | |||||||||||||
2003 | 18.23 | 21.00 | 35.19 | 50.20 | 64.84 | 71.83 | 77.52 | 78.19 | 68.47 | 54.45 | 35.90 | 29.90 | 50.48 | |||||||||||||
2004 | 14.77 | 28.66 | 38.84 | 50.90 | 60.16 | 69.77 | 75.13 | 69.42 | 72.10 | 56.13 | 42.30 | 24.33 | a | 50.21 | ||||||||||||
2005 | 18.29 | 31.57 | 36.58 | 57.27 | 60.29 | 77.43 | 79.16 | 75.81 | 72.47 | 56.84 | 39.77 | 24.10 | 52.46 | |||||||||||||
2006 | 31.19 | 24.43 | 38.55 | 59.60 | 63.94 | 74.30 | 83.29 | 77.32 | 64.70 | 49.81 | 41.20 | 30.84 | 53.26 | |||||||||||||
2007 | 24.77 | 18.57 | 41.68 | 51.37 | 68.74 | 77.33 | 79.33 | a | 77.00 | 69.40 | 58.13 | a | 37.07 | ----- | z | 54.85 | a | |||||||||
2008 | 20.68 | 22.48 | 34.35 | 47.53 | 61.03 | 71.53 | 77.52 | 76.84 | 68.27 | 53.84 | 37.37 | 18.97 | 49.20 | |||||||||||||
2009 | 14.00 | 27.04 | 37.03 | 49.87 | 65.13 | 71.10 | 71.52 | 73.84 | 72.90 | 47.55 | 46.57 | 21.68 | 49.85 | |||||||||||||
2010 | 20.94 | 27.32 | 47.10 | 59.63 | 68.84 | 70.83 | 78.55 | 78.19 | 62.47 | 58.68 | 39.17 | 23.65 | 52.95 | |||||||||||||
2011 | 17.45 | 26.32 | 35.45 | ----- | z | ----- | z | 71.57 | 80.58 | 77.19 | j | 66.26 | c | 58.61 | ----- | z | 29.77 | 48.25 | d | |||||||
2012 | 26.87 | 32.66 | 51.61 | 53.27 | ----- | z | 76.33 | 82.03 | 75.97 | 67.43 | 52.42 | 39.90 | 28.52 | 53.36 | a | |||||||||||
2013 | 21.29 | 22.11 | 31.16 | 41.23 | ----- | z | 70.67 | 76.13 | 75.65 | 69.27 | 52.58 | 34.97 | 15.06 | 46.37 | a | |||||||||||
2014 | 11.65 | ----- | z | 28.16 | 45.07 | ----- | z | 72.20 | 74.35 | 72.90 | 66.93 | 54.06 | 30.48 | a | ----- | z | 50.65 | c | ||||||||
2015 | ----- | z | ----- | z | ----- | z | 54.57 | 63.94 | 70.93 | 77.19 | 73.97 | 72.33 | 53.55 | 40.27 | 33.87 | 60.07 | c | |||||||||
2016 | 20.83 | a | 27.41 | 42.26 | 47.43 | ----- | z | ----- | z | 77.70 | a | ----- | z | 68.13 | 55.61 | ----- | z | 24.56 | d | 45.49 | d | |||||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | 57.52 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.52 | k | |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | 72.93 | a | 74.27 | 77.65 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.95 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.52 | 26.62 | 37.18 | 51.70 | 65.72 | 74.25 | 79.04 | 77.03 | 68.39 | 56.19 | 38.69 | 26.07 | 51.56 | |||||||||||||
S.D. | 5.51 | 5.32 | 5.04 | 5.07 | 4.77 | 3.29 | 3.11 | 3.32 | 3.72 | 4.55 | 4.50 | 4.86 | 1.91 | |||||||||||||
SKEW | -0.15 | -0.01 | 0.53 | 0.22 | 0.15 | -0.22 | -0.24 | 0.66 | 0.70 | 0.42 | 0.15 | -0.56 | -0.01 | |||||||||||||
MAX | 33.74 | 39.14 | 51.61 | 66.00 | 77.36 | 80.97 | 85.76 | 89.87 | 82.69 | 69.27 | 51.53 | 35.13 | 55.52 | |||||||||||||
MIN | 6.80 | 11.50 | 26.37 | 39.73 | 56.23 | 65.10 | 69.94 | 69.42 | 59.60 | 45.87 | 27.97 | 13.93 | 46.90 | |||||||||||||
YRS | 84 | 85 | 83 | 86 | 86 | 87 | 86 | 82 | 87 | 87 | 84 | 87 | 62 |