YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.75 | c | 56.13 | 44.58 | 36.30 | 29.13 | 46.58 | g | ||||
1923 | 31.68 | 30.43 | 33.65 | 46.33 | 52.26 | 62.93 | 63.16 | 62.61 | 58.60 | 45.68 | 35.60 | 30.19 | 46.09 | |||||||||||||
1924 | 21.58 | 29.21 | 30.26 | 44.48 | i | 47.61 | 62.53 | 64.65 | 65.45 | 51.77 | 43.81 | 34.03 | 22.68 | 43.05 | a | |||||||||||
1925 | 19.81 | e | 30.25 | 36.70 | a | 47.10 | 52.94 | 64.53 | 64.80 | k | 66.00 | g | 70.17 | 53.52 | d | 32.43 | 25.50 | a | 43.29 | b | ||||||
1926 | 23.77 | a | 31.61 | j | 36.81 | 43.03 | a | 56.27 | a | 61.64 | b | 65.48 | 61.81 | 58.17 | a | 49.97 | a | ----- | z | ----- | z | 50.77 | c | |||
1927 | ----- | z | ----- | z | 33.96 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | 55.26 | l | 60.67 | 64.48 | 63.29 | c | 54.53 | 47.58 | 33.48 | a | 24.39 | 49.77 | e | |||||
1929 | 22.68 | 18.89 | 34.53 | a | 43.75 | b | 52.37 | a | 59.47 | 62.16 | ----- | z | 55.17 | ----- | z | ----- | z | ----- | z | 43.63 | d | |||||
1930 | ----- | z | ----- | z | 33.32 | l | 46.73 | 51.23 | 60.17 | 63.06 | 62.97 | b | 57.93 | 49.45 | 35.00 | 25.97 | 50.28 | c | ||||||||
1931 | 28.19 | 34.18 | 31.10 | 42.43 | 50.03 | 60.67 | 63.58 | 61.23 | 61.07 | 50.03 | 38.67 | 28.84 | 45.83 | |||||||||||||
1932 | 25.16 | 37.10 | 31.00 | 44.20 | 52.13 | 60.37 | 63.06 | 63.10 | 54.97 | 42.74 | 29.93 | 23.19 | 43.91 | |||||||||||||
1933 | 28.10 | 22.21 | 35.71 | 38.77 | 49.55 | 59.60 | 64.29 | 63.97 | 61.63 | 47.23 | 34.43 | 30.29 | 44.65 | |||||||||||||
1934 | 22.61 | 27.14 | 33.06 | 44.86 | a | 53.32 | 62.20 | 64.52 | 64.23 | 54.83 | 47.81 | 37.50 | 28.97 | 45.09 | ||||||||||||
1935 | 29.50 | a | 29.32 | 39.08 | f | 47.10 | 52.29 | 62.57 | 64.16 | 65.90 | 55.43 | 49.71 | 37.23 | 30.65 | 47.62 | a | ||||||||||
1936 | 26.00 | 26.28 | 38.87 | 42.93 | 55.58 | 63.20 | 65.71 | 64.35 | 60.47 | 45.10 | 34.63 | 31.58 | 46.23 | |||||||||||||
1937 | 23.29 | 28.79 | 33.61 | 43.43 | 55.35 | 62.27 | 66.03 | 66.19 | 59.67 | 48.26 | 35.13 | 31.61 | 46.14 | |||||||||||||
1938 | 30.23 | 36.21 | 39.03 | 44.03 | 53.68 | 63.53 | 66.06 | 64.39 | 58.90 | 48.68 | 29.30 | 28.13 | 46.85 | |||||||||||||
1939 | 32.00 | a | 23.46 | 37.16 | 44.43 | 56.43 | c | 64.67 | 66.97 | 64.13 | 58.63 | 48.52 | 34.70 | 31.39 | 46.87 | |||||||||||
1940 | 22.77 | 30.52 | 36.97 | 45.40 | 54.83 | b | 61.13 | 66.40 | a | 64.65 | 59.50 | 49.90 | 36.80 | 32.82 | c | 46.81 | ||||||||||
1941 | 33.45 | 36.18 | 35.55 | 46.33 | 57.13 | 59.97 | 63.97 | 64.00 | 59.50 | 51.87 | 37.30 | 29.77 | 47.92 | |||||||||||||
1942 | 26.06 | 28.00 | 30.35 | n | 44.10 | a | 49.97 | 60.15 | c | 62.68 | 62.19 | 54.57 | b | 45.86 | c | 36.21 | b | 29.68 | 45.41 | a | ||||||
1943 | 25.89 | c | 33.38 | b | 34.29 | 46.96 | c | 52.65 | 63.13 | 65.16 | 65.86 | c | 56.46 | d | 43.97 | 31.73 | 27.84 | 45.61 | ||||||||
1944 | 26.57 | a | 35.89 | a | 35.63 | a | 42.89 | b | 53.42 | 65.90 | 65.19 | 65.61 | 56.50 | r | 46.23 | i | 38.04 | d | 28.81 | 45.80 | b | |||||
1945 | 29.94 | 33.65 | e | 39.72 | f | 42.38 | d | 52.97 | b | 61.83 | ----- | z | 60.89 | v | 56.71 | i | 47.30 | a | 37.67 | o | 23.85 | k | 44.68 | f | ||
1946 | 27.38 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.38 | k |
1947 | ----- | z | ----- | z | 37.04 | d | 47.42 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.04 | k |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | 54.87 | 65.07 | a | 64.90 | 62.91 | i | 57.03 | 48.19 | 31.70 | 32.19 | 50.57 | e | ||||||
1949 | 24.61 | 32.68 | 37.26 | 43.90 | 54.87 | 61.14 | a | 64.23 | a | 63.10 | 58.04 | b | 44.34 | b | 36.87 | 28.03 | 45.76 | |||||||||
1950 | 30.06 | 32.18 | 33.68 | 42.90 | 53.39 | 61.00 | 63.87 | 60.48 | 56.90 | 49.10 | 31.83 | 26.13 | 45.13 | |||||||||||||
1951 | 22.94 | 29.18 | 35.27 | a | 42.07 | 53.97 | 62.93 | 65.65 | 64.35 | 57.67 | 47.61 | 30.27 | 27.16 | 44.92 | ||||||||||||
1952 | 31.74 | 31.17 | 34.42 | 44.00 | 51.87 | 64.23 | 63.61 | 66.68 | 55.66 | a | 40.23 | 33.40 | 26.52 | b | 45.29 | |||||||||||
1953 | 32.32 | 26.61 | 40.87 | 43.75 | f | 50.77 | 65.64 | h | 66.29 | 63.90 | 55.50 | 47.03 | 33.97 | 23.61 | 44.09 | b | ||||||||||
1954 | 25.48 | 31.26 | a | 31.61 | 48.10 | 48.71 | 58.73 | 62.26 | 61.27 | a | 54.40 | 45.48 | 30.60 | 23.68 | 43.47 | |||||||||||
1955 | 23.81 | 21.07 | 32.97 | 39.63 | 51.58 | 56.85 | c | 62.81 | 60.16 | 56.34 | a | 45.94 | 33.90 | 30.10 | 42.93 | |||||||||||
1956 | 27.00 | 27.41 | 34.13 | 43.43 | 55.19 | 64.07 | 64.42 | 60.61 | 53.80 | 45.39 | 29.00 | 31.55 | 44.67 | |||||||||||||
1957 | 29.97 | 40.89 | 39.07 | a | 44.23 | 53.94 | 61.70 | 67.32 | 65.68 | 56.57 | 47.77 | 35.47 | 31.90 | 47.88 | ||||||||||||
1958 | 28.32 | 31.43 | 33.06 | 43.50 | 54.35 | 64.70 | 66.74 | 64.58 | 60.50 | 48.90 | 37.77 | 27.68 | 46.80 | |||||||||||||
1959 | 24.48 | 29.89 | a | 34.71 | 43.77 | 57.39 | 63.73 | 64.16 | 64.97 | 57.53 | 45.13 | 30.20 | 30.71 | 45.56 | ||||||||||||
1960 | 26.00 | 24.55 | 34.23 | 47.13 | 53.97 | 66.40 | 67.13 | 66.55 | 59.93 | 50.90 | 38.90 | 28.52 | 47.02 | |||||||||||||
1961 | 25.19 | 32.11 | 38.32 | 44.83 | 54.87 | 62.43 | 63.97 | 63.45 | 58.17 | 47.42 | 35.20 | 29.90 | 46.32 | |||||||||||||
1962 | 22.55 | 34.21 | 34.32 | 47.20 | 57.10 | 62.80 | 66.90 | 64.77 | 60.07 | 50.94 | 39.03 | 31.06 | 47.58 | |||||||||||||
1963 | 20.26 | 30.71 | 38.55 | 51.83 | 57.61 | 64.13 | 67.06 | 66.48 | 60.73 | 50.23 | 36.03 | 25.77 | 47.45 | |||||||||||||
1964 | 25.00 | 22.93 | 33.10 | 44.37 | 56.55 | 63.00 | 66.48 | 66.29 | 59.50 | 46.03 | 35.97 | 27.87 | 45.59 | |||||||||||||
1965 | 29.03 | 24.64 | 29.16 | 48.30 | 57.23 | 64.20 | 66.87 | 64.26 | 58.67 | 44.97 | 40.23 | 31.65 | 46.60 | |||||||||||||
1966 | 20.45 | 23.43 | 37.16 | 44.50 | 54.48 | 63.13 | 68.00 | 64.48 | 59.47 | 42.61 | 36.30 | 22.19 | 44.68 | |||||||||||||
1967 | 23.00 | 27.36 | 40.10 | 51.27 | 50.61 | 63.47 | 65.10 | 62.35 | 56.83 | 44.71 | 37.90 | 25.90 | 45.72 | |||||||||||||
1968 | 28.94 | 28.45 | 37.10 | 44.03 | 52.90 | 60.43 | 64.48 | 63.97 | 53.00 | 46.48 | 33.97 | 25.13 | 44.91 | |||||||||||||
1969 | 28.71 | 30.89 | 28.61 | 46.57 | 53.74 | 61.30 | 67.77 | 65.94 | 59.17 | 45.61 | 34.10 | 30.23 | 46.05 | |||||||||||||
1970 | 23.13 | 29.39 | 32.13 | 43.50 | 50.87 | 59.97 | 65.29 | 63.74 | 59.00 | 41.19 | 32.47 | 30.03 | 44.23 | |||||||||||||
1971 | 26.29 | 26.75 | 32.26 | 44.07 | 52.19 | 63.93 | 64.97 | 61.90 | 57.23 | 47.71 | 36.53 | 31.03 | 45.41 | |||||||||||||
1972 | 24.42 | 27.52 | 37.61 | 46.73 | 53.06 | 61.67 | 64.00 | 63.10 | 59.00 | 46.97 | 30.17 | 23.77 | 44.83 | |||||||||||||
1973 | 24.23 | 26.82 | 36.45 | 39.20 | 50.94 | 58.53 | 63.84 | 62.00 | 57.60 | 46.97 | 36.03 | 24.45 | 43.92 | |||||||||||||
1974 | 24.55 | 24.25 | 39.97 | 46.23 | 55.68 | 59.63 | 64.52 | 61.06 | 53.03 | 48.77 | 35.07 | 27.35 | 45.01 | |||||||||||||
1975 | 27.32 | 27.61 | 32.13 | 40.10 | 49.81 | 60.13 | 62.94 | 62.00 | 53.03 | 43.45 | 32.13 | 26.16 | 43.07 | |||||||||||||
1976 | 23.06 | 32.55 | 34.57 | a | 45.43 | 49.42 | 60.10 | 62.13 | 61.19 | 57.50 | 39.13 | 28.73 | 23.81 | 43.14 | ||||||||||||
1977 | 19.94 | 30.43 | 33.68 | 44.03 | 57.87 | 63.03 | 65.35 | 67.03 | 60.40 | 48.10 | 33.80 | 27.97 | 45.97 | |||||||||||||
1978 | 22.32 | 25.61 | 34.97 | 47.33 | 53.48 | 63.17 | 66.13 | 64.23 | 60.17 | 46.87 | 39.63 | 24.97 | 45.74 | |||||||||||||
1979 | 21.35 | 26.04 | 36.23 | 45.37 | 51.84 | 60.50 | 65.87 | 62.03 | 56.37 | 45.74 | 29.60 | 27.77 | a | 44.06 | ||||||||||||
1980 | 27.77 | 29.21 | 31.61 | 39.77 | 53.42 | 65.57 | 68.03 | 65.74 | 60.23 | 43.68 | 32.27 | 29.90 | 45.60 | |||||||||||||
1981 | 28.35 | 28.11 | 37.52 | 48.40 | 53.39 | 62.00 | 65.23 | 61.97 | 56.40 | 47.13 | 35.43 | 28.58 | 46.04 | |||||||||||||
1982 | 23.48 | 26.86 | 37.03 | 44.20 | 53.10 | 60.67 | 66.06 | 65.70 | a | 58.85 | c | 44.71 | 35.27 | 28.16 | 45.34 | |||||||||||
1983 | 24.58 | 30.89 | 36.97 | 40.53 | 50.50 | a | 59.40 | 65.35 | 64.23 | 58.20 | 49.87 | 36.18 | b | 18.97 | b | 44.64 | ||||||||||
1984 | 24.29 | 29.07 | 35.39 | 43.23 | 55.68 | 65.47 | 66.50 | a | 65.58 | 55.80 | 47.29 | 37.17 | 33.55 | 46.58 | ||||||||||||
1985 | 24.32 | 28.00 | 40.10 | 48.47 | 54.65 | 61.66 | a | 65.13 | 66.68 | 58.93 | 48.61 | 36.90 | 23.48 | 46.41 | ||||||||||||
1986 | 27.65 | 33.89 | 39.13 | 49.13 | 53.87 | 62.77 | 66.39 | 65.81 | 61.00 | 49.13 | 35.03 | 30.68 | 47.87 | |||||||||||||
1987 | 27.19 | 33.57 | 33.40 | a | 40.53 | 54.29 | 61.80 | 65.00 | 64.90 | 57.10 | 47.57 | a | 35.20 | 28.00 | 45.71 | |||||||||||
1988 | 24.42 | 27.83 | 33.29 | 41.90 | 53.61 | 62.97 | 65.35 | 65.32 | 57.20 | 47.81 | 36.43 | 26.81 | 45.25 | |||||||||||||
1989 | 29.26 | 28.07 | 36.58 | 47.03 | 56.87 | 61.53 | 66.68 | 64.52 | 54.80 | 47.00 | 34.60 | 22.23 | 45.76 | |||||||||||||
1990 | 28.55 | 31.50 | 37.42 | 47.10 | 53.16 | 67.90 | 65.00 | 63.84 | 61.20 | 44.84 | 39.43 | 24.87 | 47.07 | |||||||||||||
1991 | 28.10 | 32.64 | 37.39 | 45.33 | 56.77 | 63.27 | 65.74 | 64.45 | 57.10 | 46.81 | 32.43 | 31.06 | 46.76 | |||||||||||||
1992 | 28.42 | 34.66 | 39.74 | 46.93 | 53.81 | 61.70 | 65.81 | 62.58 | 58.03 | 47.16 | 34.07 | 29.90 | 46.90 | |||||||||||||
1993 | 28.77 | 28.57 | 35.19 | 43.13 | 52.71 | 63.30 | 68.23 | 65.55 | 55.93 | 44.77 | 30.93 | 28.32 | 45.45 | |||||||||||||
1994 | 26.19 | 26.82 | 37.55 | 42.77 | 56.00 | 66.20 | 67.48 | 65.35 | 57.70 | 49.13 | a | 38.17 | 33.74 | 47.26 | ||||||||||||
1995 | 29.19 | 34.79 | 36.32 | 41.97 | a | 54.48 | 61.63 | 66.29 | 66.16 | 58.87 | 44.57 | a | 36.03 | 29.16 | 46.62 | |||||||||||
1996 | 25.68 | 30.97 | 32.43 | a | 43.37 | 60.16 | 65.60 | 67.65 | 66.16 | 58.03 | 45.73 | a | 36.43 | 28.74 | 46.75 | |||||||||||
1997 | 26.90 | 31.79 | 37.81 | 41.83 | 54.29 | 62.00 | 66.52 | 65.58 | 61.10 | 47.87 | 34.03 | 26.74 | 46.37 | |||||||||||||
1998 | 30.00 | 32.43 | 34.65 | 41.17 | 57.81 | 65.63 | 69.81 | 66.61 | 62.80 | 51.77 | 40.30 | 29.61 | 48.55 | |||||||||||||
1999 | 30.39 | 34.14 | 38.71 | 45.50 | 54.35 | 63.23 | 67.03 | 67.13 | 57.67 | 44.71 | 38.40 | 28.16 | 47.45 | |||||||||||||
2000 | 29.29 | 35.17 | 38.32 | 46.87 | 58.32 | 64.43 | 68.58 | 66.58 | 58.70 | 50.10 | 32.13 | 26.48 | 47.92 | |||||||||||||
2001 | 27.81 | 31.71 | 37.19 | 47.23 | 55.97 | 66.13 | 69.45 | 67.39 | 59.60 | 46.32 | 40.10 | 29.87 | 48.23 | |||||||||||||
2002 | 29.68 | 27.57 | 32.29 | 50.47 | 55.19 | 65.47 | 67.06 | 68.00 | 58.80 | 50.19 | 35.20 | 30.55 | 47.54 | |||||||||||||
2003 | 27.84 | 30.57 | 37.55 | 45.63 | 55.87 | 62.33 | 66.06 | 67.23 | 58.67 | 51.39 | 39.13 | 28.23 | 47.54 | |||||||||||||
2004 | 29.71 | 29.34 | 44.23 | 46.57 | 55.84 | 64.93 | 66.42 | 63.81 | 58.83 | 50.42 | 37.83 | 28.13 | 48.00 | |||||||||||||
2005 | 33.52 | 34.68 | 36.52 | 44.13 | 55.23 | a | 63.60 | 65.94 | 64.87 | 60.40 | 48.55 | 35.07 | 27.16 | 47.47 | ||||||||||||
2006 | 30.03 | 30.36 | 40.45 | 48.27 | 57.03 | 64.37 | 66.45 | 66.26 | 56.40 | 48.23 | 36.43 | 27.77 | 47.67 | |||||||||||||
2007 | 26.03 | 28.64 | 40.80 | a | 41.23 | 53.97 | 60.90 | 63.94 | 65.81 | 61.30 | 48.65 | 36.17 | 29.90 | 46.44 | ||||||||||||
2008 | 25.74 | 29.76 | 34.65 | 42.03 | 53.06 | 65.37 | 66.10 | 64.81 | 56.72 | a | 46.74 | 34.50 | 24.71 | 45.35 | ||||||||||||
2009 | 26.39 | 32.43 | 37.94 | 44.00 | 55.06 | 63.97 | 66.90 | 65.45 | 56.53 | 44.87 | 36.10 | 25.11 | c | 46.23 | ||||||||||||
2010 | 25.42 | 29.54 | 36.77 | a | 45.27 | d | 53.81 | 66.60 | 66.29 | 66.45 | 61.00 | 48.39 | 32.67 | 29.10 | 46.77 | |||||||||||
2011 | 24.03 | 25.11 | 38.65 | 47.63 | 53.23 | 68.00 | 70.48 | 69.77 | 58.03 | 48.29 | 34.13 | 28.07 | a | 47.12 | ||||||||||||
2012 | 29.42 | 30.90 | 40.55 | 49.32 | e | 59.25 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.55 | h | |||
2013 | ----- | z | 29.54 | 35.10 | 41.17 | 53.48 | 66.13 | 65.39 | 66.65 | 61.30 | 46.61 | 34.57 | 26.20 | a | 47.83 | a | ||||||||||
2014 | 22.90 | 29.32 | 32.23 | 43.97 | 52.53 | a | 64.68 | b | 65.90 | b | 66.71 | 60.93 | 49.77 | 32.83 | 33.03 | a | 46.23 | |||||||||
2015 | 26.71 | 29.93 | 36.77 | 44.53 | 49.50 | a | 61.34 | a | 68.06 | 66.81 | d | 63.96 | c | 51.63 | a | 36.03 | 29.34 | b | 47.05 | |||||||
2016 | 27.74 | d | 29.83 | 38.83 | b | 45.57 | 53.10 | 63.53 | 68.87 | 63.97 | 58.90 | a | 50.97 | 42.21 | a | 28.48 | 47.67 | |||||||||
2017 | 31.03 | a | 35.69 | b | 42.06 | 47.40 | 52.43 | a | 63.77 | 66.47 | a | 64.06 | 60.97 | 48.23 | 39.97 | 27.97 | 48.34 | |||||||||
2018 | 21.23 | 27.36 | 41.32 | 43.23 | 61.13 | 68.63 | 69.45 | 66.90 | 60.50 | 50.19 | 33.47 | 29.94 | 47.78 | |||||||||||||
2019 | 28.10 | 29.81 | a | 35.97 | b | 46.17 | 54.33 | a | 59.72 | a | 64.64 | c | 69.41 | b | 62.83 | a | 44.52 | 33.97 | 31.84 | 46.78 | ||||||
2020 | 29.65 | 28.59 | 44.03 | b | 44.93 | 56.42 | 63.41 | a | 70.87 | 68.77 | 56.83 | 45.00 | 39.07 | 26.55 | 47.84 | |||||||||||
2021 | 27.35 | 23.36 | 36.71 | 44.93 | 56.03 | 66.13 | 66.43 | a | 66.61 | 61.55 | a | 49.63 | a | 37.60 | 36.74 | 47.76 | ||||||||||
2022 | 23.71 | 23.22 | a | 33.30 | a | 48.31 | a | 58.45 | 66.15 | q | 72.12 | e | 69.97 | 62.27 | 49.68 | 34.20 | 29.97 | a | 45.93 | a | ||||||
2023 | 30.29 | c | 28.25 | 38.74 | 44.55 | a | 58.06 | 65.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.17 | f | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 26.53 | 29.63 | 36.11 | 44.79 | 54.04 | 62.86 | 65.82 | 64.79 | 58.30 | 47.26 | 35.14 | 28.21 | 46.17 | |||||||||||||
S.D. | 3.17 | 3.81 | 3.09 | 2.64 | 2.52 | 2.28 | 1.93 | 2.07 | 2.72 | 2.63 | 2.87 | 2.98 | 1.32 | |||||||||||||
SKEW | -0.05 | -0.05 | 0.08 | 0.11 | 0.05 | 0.10 | 0.59 | -0.05 | 0.62 | -0.40 | -0.14 | -0.27 | -0.43 | |||||||||||||
MAX | 33.52 | 40.89 | 44.23 | 51.83 | 61.13 | 68.63 | 72.12 | 69.97 | 70.17 | 53.52 | 42.21 | 36.74 | 48.55 | |||||||||||||
MIN | 19.81 | 18.89 | 28.61 | 38.77 | 47.61 | 56.85 | 62.13 | 60.16 | 51.77 | 39.13 | 28.73 | 18.97 | 42.93 | |||||||||||||
YRS | 95 | 94 | 93 | 94 | 96 | 95 | 94 | 93 | 95 | 95 | 94 | 94 | 82 |