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 | 43.90 | 49.83 | 54.06 | 55.32 | ----- | z | 39.23 | 23.07 | 24.87 | 41.47 | e | |||||||
1930 | 4.77 | 25.07 | 31.35 | 38.73 | 43.16 | 46.67 | 56.45 | 57.87 | 48.10 | 35.39 | 26.40 | 20.77 | a | 36.23 | ||||||||||||
1931 | 25.52 | 23.79 | 31.97 | 36.17 | 45.23 | 46.36 | b | ----- | z | 53.03 | ----- | z | ----- | z | 24.76 | e | 18.42 | 33.91 | c | |||||||
1932 | 15.63 | d | 16.14 | 29.68 | 37.63 | 42.84 | 51.20 | 50.26 | 53.39 | 47.10 | 37.81 | 32.33 | 14.10 | 35.67 | ||||||||||||
1933 | 18.39 | 11.33 | a | 31.26 | 36.73 | 39.00 | 49.17 | 55.65 | 55.65 | 42.47 | 38.52 | 31.66 | a | 27.35 | 36.43 | |||||||||||
1934 | 27.52 | 31.29 | 34.42 | 42.57 | 45.48 | 51.07 | 52.68 | 57.55 | ----- | z | ----- | z | 33.38 | a | 24.19 | 40.01 | b | |||||||||
1935 | 20.77 | a | 27.89 | 28.10 | a | 33.60 | ----- | z | ----- | z | 61.69 | b | 54.10 | 50.40 | 33.26 | 24.24 | a | 24.97 | 35.90 | b | ||||||
1936 | 20.16 | 3.62 | 28.71 | 38.40 | 47.23 | 51.40 | 54.45 | 53.58 | 45.90 | 38.94 | 21.76 | a | 23.52 | 35.64 | ||||||||||||
1937 | 0.65 | 16.00 | b | 32.97 | 35.40 | 44.00 | 50.13 | 56.45 | 49.71 | 49.27 | 40.03 | 31.33 | 26.61 | 36.05 | ||||||||||||
1938 | 24.23 | 25.63 | a | 30.58 | 38.77 | 43.06 | 53.00 | 60.23 | 53.26 | 51.62 | a | 38.55 | 24.00 | 22.94 | 38.82 | |||||||||||
1939 | 24.13 | 18.26 | a | 30.00 | 39.80 | 44.29 | 47.27 | 56.45 | 58.13 | 47.40 | 37.13 | 28.27 | 28.10 | 38.27 | ||||||||||||
1940 | 23.06 | 28.28 | 33.77 | 38.53 | 45.16 | 52.37 | 56.74 | 53.87 | 51.30 | 41.13 | 23.07 | a | 23.32 | 39.22 | ||||||||||||
1941 | 25.07 | a | 29.71 | 33.65 | 39.57 | 42.00 | 49.70 | 61.42 | 55.13 | 43.13 | 36.70 | a | 31.03 | 25.23 | a | 39.36 | ||||||||||
1942 | 17.68 | 26.21 | 29.77 | a | 36.40 | 40.97 | 46.87 | 56.45 | 58.58 | 49.63 | 37.55 | 26.73 | 22.42 | 37.44 | ||||||||||||
1943 | 10.39 | 23.19 | a | 26.18 | c | 39.38 | a | 39.71 | 46.07 | 55.74 | 52.58 | 50.57 | 39.74 | 30.38 | a | 19.97 | 36.16 | |||||||||
1944 | 17.03 | b | 23.55 | 27.35 | 37.73 | 44.35 | 50.50 | 56.71 | 53.74 | 49.07 | 42.45 | 29.97 | 20.84 | 37.78 | ||||||||||||
1945 | 24.84 | 28.07 | 30.06 | 33.13 | 45.32 | 49.13 | 55.26 | 53.68 | 45.67 | 37.71 | 25.73 | 23.39 | 37.67 | |||||||||||||
1946 | 20.67 | a | 22.50 | 31.55 | 36.07 | 46.23 | 46.03 | a | 54.68 | 56.10 | a | 45.97 | 32.48 | 24.00 | 24.74 | 36.75 | ||||||||||
1947 | 15.82 | c | ----- | z | 32.00 | a | 36.40 | 48.16 | 48.97 | 53.58 | 51.00 | 48.23 | 40.32 | 28.69 | a | 23.97 | 38.83 | a | ||||||||
1948 | 18.07 | c | 19.14 | 28.42 | 32.93 | 41.87 | a | 55.45 | a | 51.94 | 52.17 | a | 45.67 | 35.84 | 27.27 | 12.65 | 35.12 | |||||||||
1949 | -1.55 | 13.14 | 31.26 | 36.82 | h | 46.24 | b | 49.14 | b | 51.56 | v | 50.79 | g | 47.40 | 33.61 | ----- | z | ----- | z | 31.32 | e | |||||
1950 | -0.16 | l | ----- | z | ----- | z | 33.84 | e | 41.26 | 51.00 | a | 57.10 | 54.74 | 46.80 | 37.29 | 29.00 | a | 29.10 | 42.24 | c | ||||||
1951 | 18.05 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.23 | 37.16 | 27.86 | a | 17.03 | a | 32.82 | h | ||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.37 | a | 23.67 | 24.61 | 29.55 | i | ||
1953 | 28.68 | 27.63 | a | 29.61 | 34.83 | 40.03 | 44.83 | 56.26 | 53.10 | 47.21 | a | 37.55 | 31.10 | a | 25.32 | 38.01 | ||||||||||
1954 | 17.17 | b | 26.41 | f | ----- | z | ----- | z | ----- | z | ----- | z | 51.48 | 50.13 | a | 48.07 | 34.26 | 34.10 | a | 20.68 | 36.56 | e | ||||
1955 | 21.11 | c | ----- | z | ----- | z | 29.67 | x | 38.03 | a | 49.87 | 53.23 | 50.42 | 47.53 | 34.90 | 21.11 | b | 17.19 | 37.04 | c | ||||||
1956 | 21.06 | 10.21 | a | 25.29 | 38.03 | 45.61 | 48.07 | 56.26 | 56.39 | 45.33 | 35.52 | 26.13 | 22.65 | 35.88 | ||||||||||||
1957 | 4.07 | a | 15.93 | a | 30.10 | a | 36.90 | 47.90 | 49.83 | 51.71 | 50.39 | 49.17 | 37.45 | 28.43 | 27.52 | 35.78 | ||||||||||
1958 | 27.87 | 34.64 | 29.81 | 34.80 | 47.68 | 55.63 | 59.90 | 57.42 | 45.00 | 37.55 | 26.28 | a | 26.52 | 40.26 | ||||||||||||
1959 | 22.71 | 21.86 | 30.26 | 35.53 | 40.03 | 48.23 | 56.03 | 50.77 | a | 45.83 | a | 36.39 | 22.80 | 23.90 | 36.20 | |||||||||||
1960 | 15.35 | 26.28 | 29.42 | 34.97 | 40.16 | 49.10 | 59.03 | 50.58 | 48.03 | 37.65 | 28.87 | 21.47 | a | 36.74 | ||||||||||||
1961 | 23.55 | 30.82 | 31.35 | 34.50 | 42.81 | 52.90 | 58.00 | 59.97 | 42.87 | 33.03 | 22.33 | 18.52 | 37.55 | |||||||||||||
1962 | 14.61 | 25.64 | 26.26 | l | 36.50 | h | 38.42 | 48.63 | 53.32 | 51.71 | g | 47.23 | 36.75 | c | 31.61 | b | 28.13 | a | 36.04 | c | ||||||
1963 | 13.10 | a | 28.58 | b | 31.00 | 35.09 | g | 41.08 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.77 | i | 28.44 | h | |
1964 | 19.38 | j | 20.55 | g | ----- | z | 32.42 | d | 40.33 | a | ----- | z | ----- | z | ----- | z | 42.77 | 34.67 | a | 28.83 | a | 17.21 | g | 35.80 | g | |
1965 | 21.97 | b | 23.04 | 26.50 | a | 38.07 | ----- | z | 48.00 | b | 54.30 | a | 53.71 | j | 41.30 | c | ----- | z | 31.00 | b | 22.88 | e | 34.12 | c | ||
1966 | 16.73 | e | 22.71 | k | 29.39 | h | 33.14 | h | 42.39 | m | ----- | z | 52.25 | o | ----- | z | 49.80 | 35.48 | f | 31.47 | 26.39 | 31.10 | h | |||
1967 | 26.03 | 28.39 | 27.94 | 29.96 | e | 39.48 | 50.47 | 52.97 | 58.33 | a | 51.10 | 35.48 | 29.67 | 19.45 | b | 37.44 | ||||||||||
1968 | 21.23 | 28.90 | 30.73 | a | 32.23 | 43.00 | 49.43 | 57.03 | 51.61 | 46.87 | 35.10 | 31.00 | 18.23 | a | 37.11 | |||||||||||
1969 | 8.00 | 20.00 | 29.19 | 36.07 | 44.90 | 54.03 | 52.39 | 48.11 | d | 46.80 | 33.58 | 27.40 | 25.48 | 35.50 | ||||||||||||
1970 | 19.50 | a | 29.54 | 29.35 | 31.60 | 40.65 | 52.70 | 55.35 | 53.29 | 40.20 | 34.55 | 27.67 | 16.52 | 35.91 | ||||||||||||
1971 | 19.00 | b | 25.93 | 26.52 | 35.00 | 44.16 | 44.37 | 55.74 | 56.77 | 41.22 | c | 33.61 | 28.93 | a | 14.16 | 35.45 | ||||||||||
1972 | 14.07 | a | 22.66 | 30.94 | 29.60 | 45.13 | 50.03 | a | 53.00 | 55.48 | 41.03 | 33.55 | 31.90 | a | 17.48 | 35.41 | ||||||||||
1973 | 18.43 | a | 26.00 | 32.23 | 35.27 | 42.13 | 50.63 | k | 55.94 | 51.32 | 46.93 | 34.45 | 27.77 | 28.53 | a | 36.27 | a | |||||||||
1974 | 17.06 | 27.54 | 29.52 | 36.70 | 39.26 | 49.67 | 52.16 | 53.97 | 48.67 | 35.71 | 31.57 | 25.16 | 37.25 | |||||||||||||
1975 | 15.81 | 18.31 | b | 28.00 | 32.87 | 42.16 | 47.67 | 59.25 | c | 51.26 | 48.73 | 37.45 | 27.57 | 22.93 | a | 36.00 | ||||||||||
1976 | 20.77 | a | 24.24 | 27.19 | 35.87 | 40.00 | 44.63 | 52.55 | 51.58 | 50.60 | 35.65 | 27.13 | 20.55 | 35.90 | ||||||||||||
1977 | 14.97 | 26.93 | 28.48 | 39.33 | 37.90 | 51.70 | 53.94 | 60.00 | 44.60 | 35.61 | 25.93 | 21.94 | 36.78 | |||||||||||||
1978 | 24.77 | 29.52 | a | 33.90 | 36.97 | 40.55 | 48.27 | 54.48 | 54.42 | 45.83 | 35.74 | 22.23 | 12.65 | 36.61 | ||||||||||||
1979 | 7.10 | a | 22.11 | 31.74 | 33.83 | 43.06 | 49.83 | 55.74 | 55.48 | 50.57 | 39.67 | a | 24.90 | 28.65 | 36.89 | |||||||||||
1980 | 13.58 | 26.55 | 30.16 | 39.14 | a | 44.03 | 46.07 | 53.29 | 51.29 | 47.27 | 39.16 | 33.30 | 27.23 | 37.59 | ||||||||||||
1981 | 30.94 | 27.43 | 32.23 | 32.70 | 42.26 | 44.57 | 51.97 | 55.39 | 46.00 | a | 34.61 | 30.63 | 21.94 | 37.55 | ||||||||||||
1982 | 17.03 | 22.82 | 29.29 | 30.59 | a | 40.87 | 51.13 | 52.48 | 52.87 | 46.10 | 35.65 | 22.82 | b | 19.39 | 35.09 | |||||||||||
1983 | 28.07 | a | 30.54 | 33.32 | 33.67 | 42.68 | 46.27 | 53.13 | 56.52 | 46.07 | 37.90 | 31.79 | a | 15.33 | a | 37.94 | ||||||||||
1984 | 20.57 | a | 27.72 | 33.03 | 34.47 | 38.19 | 47.50 | 54.77 | 53.65 | 44.90 | 33.19 | 30.14 | b | 7.16 | 35.44 | |||||||||||
1985 | 15.26 | 13.75 | 25.26 | 35.20 | 43.65 | 48.70 | 61.71 | 51.90 | 44.67 | 32.43 | a | 12.87 | 13.72 | b | 33.26 | |||||||||||
1986 | 23.52 | d | 23.22 | a | 35.10 | 34.41 | a | 43.88 | e | 55.00 | 51.97 | 61.26 | 47.33 | 39.80 | a | 26.50 | 23.03 | 38.75 | ||||||||
1987 | 20.32 | c | 28.50 | 34.60 | a | 38.57 | 44.06 | 51.43 | 55.71 | 56.40 | a | 51.57 | 39.26 | 31.55 | a | 24.19 | e | 39.68 | ||||||||
1988 | 18.45 | 25.41 | 30.71 | 38.37 | 41.74 | 47.63 | 55.35 | 55.00 | 46.03 | a | 45.06 | 30.53 | 22.33 | a | 38.05 | |||||||||||
1989 | 21.84 | 17.70 | a | 28.61 | 40.73 | 43.61 | 51.97 | 47.68 | 52.23 | 46.87 | 37.93 | a | 29.37 | ----- | z | 38.05 | a | |||||||||
1990 | 26.35 | 20.70 | a | 32.50 | a | 40.21 | a | 41.94 | 48.93 | 60.77 | a | 58.03 | 52.28 | a | 36.97 | 27.86 | i | 15.16 | 39.44 | a | ||||||
1991 | 17.90 | a | 32.70 | a | 29.82 | c | 36.10 | 42.58 | 47.17 | 57.29 | 58.65 | 52.53 | 36.06 | 31.46 | b | 28.77 | a | 39.25 | ||||||||
1992 | ----- | z | 32.83 | 36.61 | 37.57 | 45.84 | 54.69 | a | 57.92 | g | 58.67 | a | 45.33 | 42.39 | 31.86 | a | 15.71 | 40.15 | b | |||||||
1993 | 14.66 | b | 19.21 | 31.06 | 37.77 | 49.29 | 49.73 | 52.29 | 55.13 | 47.30 | 40.00 | 20.59 | a | 25.17 | a | 36.85 | ||||||||||
1994 | 28.19 | ----- | z | 33.94 | 40.20 | ----- | z | 46.43 | 62.03 | 52.61 | 50.90 | 39.10 | 26.23 | 26.29 | c | 40.59 | b | |||||||||
1995 | 21.37 | a | 29.82 | 33.55 | 36.03 | 43.23 | 47.36 | h | 54.68 | i | ----- | z | 49.48 | i | 35.06 | 29.87 | 24.39 | 31.66 | d | |||||||
1996 | 16.97 | 21.85 | c | 29.58 | 35.53 | 39.07 | a | 46.89 | b | 57.00 | 55.61 | 42.09 | h | 38.06 | 25.20 | 18.30 | h | 36.58 | b | |||||||
1997 | 21.00 | b | 21.29 | g | 28.77 | 33.10 | a | 46.48 | 49.40 | ----- | z | 57.81 | 50.08 | d | 36.62 | e | ----- | z | ----- | z | 40.41 | d | ||||
1998 | 22.35 | 31.43 | g | 31.64 | i | 36.03 | 44.81 | 48.77 | 61.74 | ----- | z | 54.27 | 36.19 | 32.37 | 22.40 | k | 42.07 | d | ||||||||
1999 | 26.45 | 26.48 | g | 30.84 | 32.83 | 38.29 | 46.37 | 54.05 | i | 56.23 | 45.03 | 35.29 | 35.23 | 30.05 | l | 38.51 | c | |||||||||
2000 | 21.42 | 23.31 | 31.23 | i | 37.10 | 38.87 | 47.97 | 52.13 | 51.39 | 44.33 | 34.94 | 22.47 | 19.06 | 35.73 | a | |||||||||||
2001 | ----- | z | 19.57 | 27.67 | a | 32.67 | 41.97 | 46.04 | f | 50.58 | g | 56.26 | 50.93 | 36.81 | 34.00 | ----- | z | 37.48 | d | |||||||
2002 | 22.86 | j | 26.52 | e | 25.63 | a | 34.29 | b | 40.32 | 48.27 | 56.71 | 53.74 | 46.00 | 32.17 | a | 29.55 | a | 28.15 | r | 39.32 | b | |||||
2003 | 28.29 | 28.39 | 30.97 | 35.63 | 42.00 | i | 51.30 | g | 55.40 | f | 55.18 | i | 49.87 | g | 40.54 | g | ----- | z | 25.10 | u | 30.82 | h | ||||
2004 | 21.60 | k | 25.19 | h | 32.22 | h | 37.05 | i | 43.25 | k | 49.95 | k | 60.53 | p | 57.78 | h | 46.09 | h | 39.77 | i | 28.25 | j | 22.86 | x | ----- | z |
2005 | 20.85 | k | 24.38 | l | 30.90 | k | 38.67 | i | 44.94 | 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 | 30.58 | r | 25.29 | 25.29 | k | |
2013 | 18.00 | q | 25.88 | l | 28.95 | j | 31.83 | a | 44.12 | o | 53.57 | p | 60.21 | c | 58.89 | d | 50.93 | 35.52 | 27.83 | 16.65 | 40.27 | e | ||||
2014 | 24.27 | a | 20.58 | d | 30.77 | 36.70 | 43.65 | 51.90 | 61.06 | 61.42 | 50.70 | 42.33 | a | 26.73 | 27.29 | 39.78 | ||||||||||
2015 | 23.85 | d | 32.81 | a | 35.13 | a | 34.97 | 47.42 | e | 58.28 | a | 59.81 | e | 57.93 | c | 46.59 | a | 44.88 | o | 25.34 | a | 23.80 | a | 40.54 | a | |
2016 | 24.65 | 29.73 | c | 33.39 | 42.42 | d | 46.89 | d | 58.80 | y | 54.64 | f | 56.06 | o | 45.77 | q | 39.42 | 35.80 | 14.40 | a | 33.34 | d | ||||
2017 | 14.10 | 20.33 | a | 30.97 | a | 34.97 | a | 42.52 | j | 49.93 | b | 56.38 | b | 58.48 | h | 50.38 | f | 33.86 | c | 29.19 | c | 21.62 | b | 32.37 | c | |
2018 | 27.33 | a | 21.83 | d | 28.50 | k | 35.79 | b | 50.25 | c | 51.36 | e | 58.42 | g | 57.37 | l | 44.80 | 36.35 | 29.37 | 26.68 | 35.97 | c | ||||
2019 | 27.00 | 15.46 | 25.00 | 37.97 | 45.87 | 48.63 | 53.81 | 57.55 | 46.83 | 30.81 | 27.43 | 27.16 | 36.96 | |||||||||||||
2020 | 25.29 | 26.45 | 28.06 | 34.27 | 43.03 | 48.97 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.34 | f | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.58 | 23.96 | 30.41 | 35.93 | 43.00 | 49.47 | 55.63 | 54.71 | 47.28 | 36.80 | 28.00 | 22.05 | 37.01 | |||||||||||||
S.D. | 6.57 | 5.95 | 2.57 | 2.75 | 2.90 | 2.80 | 3.17 | 3.02 | 2.96 | 2.71 | 3.96 | 4.76 | 1.47 | |||||||||||||
SKEW | -0.99 | -0.87 | -0.01 | 0.06 | 0.21 | 0.62 | 0.28 | 0.15 | -0.13 | 0.42 | -0.74 | -0.74 | 0.21 | |||||||||||||
MAX | 30.94 | 34.64 | 36.61 | 42.57 | 50.25 | 58.28 | 62.03 | 61.42 | 54.27 | 45.06 | 35.80 | 29.10 | 40.26 | |||||||||||||
MIN | -1.55 | 3.62 | 25.00 | 29.60 | 37.90 | 44.37 | 47.68 | 48.11 | 40.20 | 30.81 | 12.87 | 7.16 | 33.26 | |||||||||||||
YRS | 74 | 69 | 70 | 74 | 73 | 70 | 67 | 68 | 72 | 75 | 77 | 72 | 47 |