YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.58 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.58 | k | |
1926 | ----- | z | 31.65 | h | 33.85 | e | 38.45 | a | 43.20 | a | 52.15 | d | 54.52 | d | 51.77 | 42.00 | d | 39.04 | c | 31.86 | a | 21.79 | b | 40.86 | b | |
1927 | 21.65 | h | 30.46 | 31.10 | a | 33.50 | 39.16 | 49.13 | 50.29 | 53.16 | 45.72 | e | 38.15 | e | 33.76 | i | 17.67 | g | 41.19 | c | ||||||
1928 | ----- | z | ----- | z | ----- | z | 33.23 | d | 43.04 | f | 47.21 | f | ----- | z | ----- | z | 43.44 | n | 41.04 | c | 31.22 | g | 25.04 | d | 33.10 | i |
1929 | 15.11 | c | 12.57 | 31.04 | c | 34.79 | a | 40.83 | a | 47.59 | c | 51.31 | e | 52.33 | d | 44.79 | f | 38.93 | b | 21.32 | e | 27.12 | e | 33.90 | a | |
1930 | 4.39 | 32.04 | e | 33.69 | b | 36.78 | c | 40.86 | c | 46.48 | g | 51.07 | d | 53.36 | f | 47.70 | c | 34.60 | a | 29.62 | i | 26.93 | d | 34.23 | c | |
1931 | 29.29 | 27.89 | 33.03 | 37.86 | a | 46.32 | 50.63 | 54.52 | 52.29 | 48.00 | a | 38.87 | 28.43 | 19.71 | 38.90 | |||||||||||
1932 | 21.47 | a | 25.55 | 35.13 | 39.23 | 43.00 | 48.77 | 52.26 | 51.90 | 44.77 | 41.43 | a | 34.53 | 21.03 | 38.26 | |||||||||||
1933 | 25.35 | 20.18 | 32.03 | 36.10 | 40.90 | 48.97 | 52.94 | 53.52 | 44.70 | 41.90 | 33.90 | 34.23 | a | 38.73 | ||||||||||||
1934 | 31.39 | 30.57 | 35.58 | 43.93 | 46.03 | 49.73 | 52.58 | 53.77 | 45.40 | 43.74 | 37.23 | 30.26 | 41.69 | |||||||||||||
1935 | 27.32 | 28.96 | 29.48 | 34.17 | 40.90 | 48.87 | 53.13 | 49.84 | 48.00 | 36.68 | 27.00 | 27.48 | 37.65 | |||||||||||||
1936 | 29.90 | 14.18 | a | 30.74 | 40.17 | 46.81 | 52.43 | 52.45 | 51.16 | 44.26 | c | 38.00 | 22.45 | a | 27.39 | c | 37.50 | |||||||||
1937 | 5.08 | e | 21.35 | b | 33.93 | d | 36.63 | 41.23 | 51.73 | 55.16 | 49.74 | 46.90 | 41.20 | a | 35.64 | b | 29.68 | 37.36 | ||||||||
1938 | 28.06 | 27.82 | 31.67 | a | 37.69 | a | 40.65 | 50.30 | 55.50 | a | 48.26 | 50.50 | 39.90 | 25.17 | 25.42 | 38.41 | ||||||||||
1939 | 28.26 | 24.89 | a | 34.03 | 37.20 | 44.52 | 47.50 | 53.80 | a | 53.55 | 47.23 | 38.23 | 27.67 | 31.00 | 38.99 | |||||||||||
1940 | 23.84 | 30.57 | a | 35.32 | 38.50 | 43.58 | 48.63 | 54.10 | 51.68 | 50.00 | 42.17 | a | 26.67 | 25.74 | 39.23 | |||||||||||
1941 | 26.52 | 27.61 | 33.13 | 38.47 | 43.35 | 48.83 | 56.52 | 55.16 | 45.13 | 39.35 | 32.90 | a | 28.35 | 39.61 | ||||||||||||
1942 | 18.32 | 27.21 | 28.37 | a | 37.20 | 43.81 | 46.70 | 54.03 | 54.48 | 46.27 | 38.10 | a | 30.63 | 27.23 | 37.70 | |||||||||||
1943 | 15.50 | a | 28.82 | 28.87 | 39.59 | a | 39.84 | 46.03 | 51.87 | 49.45 | 45.76 | a | 39.61 | 33.17 | a | 25.77 | 37.02 | |||||||||
1944 | 21.40 | a | 27.25 | a | 28.19 | 36.63 | 42.45 | 48.83 | 52.97 | 50.81 | 47.40 | 40.74 | 31.67 | 26.06 | 37.87 | |||||||||||
1945 | 30.13 | 30.54 | 32.03 | a | 33.57 | b | 44.55 | 45.97 | 52.26 | 52.26 | 44.18 | b | 38.82 | c | 30.22 | c | 25.30 | d | 38.32 | |||||||
1946 | 25.62 | e | 27.56 | c | 32.00 | d | 36.54 | b | 44.79 | b | 49.07 | 52.97 | 53.03 | 45.07 | 34.64 | c | 26.86 | a | 28.17 | a | 38.03 | |||||
1947 | 17.78 | d | 27.28 | c | 33.52 | 38.46 | b | 47.39 | 49.43 | 52.61 | 49.29 | 48.60 | 43.42 | 32.27 | 28.55 | b | 39.05 | |||||||||
1948 | 23.54 | c | 24.00 | d | 28.43 | a | 34.43 | 44.84 | 53.57 | 50.03 | 51.90 | 45.40 | 35.94 | 30.33 | 20.94 | 36.95 | ||||||||||
1949 | 6.48 | 24.36 | 31.97 | 35.33 | 45.32 | 46.47 | 49.50 | a | 50.71 | 48.93 | 33.84 | 36.17 | 27.84 | 36.41 | ||||||||||||
1950 | 6.74 | 22.89 | 31.71 | 34.72 | a | 39.58 | 51.73 | 52.24 | f | 52.48 | 46.23 | 41.06 | 34.30 | 33.03 | 35.86 | a | ||||||||||
1951 | 26.29 | 27.39 | 27.58 | 35.24 | e | 43.74 | 50.23 | 52.77 | 50.90 | 47.57 | 39.42 | 30.14 | a | 21.74 | 37.75 | |||||||||||
1952 | 19.77 | 29.41 | 31.00 | 36.73 | 44.32 | 49.97 | 53.10 | 51.84 | 47.40 | 41.00 | 25.10 | 29.65 | h | 39.06 | a | |||||||||||
1953 | 36.03 | 30.68 | 32.06 | 36.37 | 40.52 | 45.60 | 50.71 | 53.26 | h | 46.77 | 40.58 | 34.47 | 29.23 | a | 38.46 | a | ||||||||||
1954 | 21.35 | 31.14 | 27.20 | a | 35.77 | 43.73 | i | 46.77 | 50.39 | 50.06 | 46.27 | 36.71 | 37.37 | 25.23 | a | 37.11 | a | |||||||||
1955 | 25.55 | 25.64 | 26.52 | 33.53 | 41.06 | 49.40 | 50.73 | e | 49.35 | 46.80 | 39.19 | 25.37 | 23.26 | 36.37 | ||||||||||||
1956 | 25.16 | 17.14 | 32.52 | 37.90 | 48.42 | 47.27 | 54.77 | 52.16 | 46.63 | 39.81 | 30.43 | 27.58 | 38.32 | |||||||||||||
1957 | 10.16 | 27.52 | c | 33.26 | 38.13 | 49.06 | 50.77 | 50.16 | 49.58 | 49.03 | 39.87 | 29.93 | 30.58 | 38.17 | ||||||||||||
1958 | 30.19 | 36.07 | a | 31.06 | 37.30 | 49.16 | 54.37 | 57.23 | 54.00 | 46.73 | 37.61 | 31.93 | 29.71 | 41.28 | ||||||||||||
1959 | 25.42 | 28.21 | 30.74 | 37.40 | 41.23 | 49.57 | 52.94 | 49.13 | 47.27 | 38.71 | 26.03 | 25.84 | 37.71 | |||||||||||||
1960 | 14.94 | 27.55 | 30.48 | 37.97 | 42.35 | 48.40 | 53.97 | 50.10 | 46.13 | 39.84 | 31.60 | 23.65 | 37.25 | |||||||||||||
1961 | 28.87 | 35.11 | 34.77 | 37.73 | 44.16 | 52.27 | 55.16 | 56.61 | 43.80 | 36.71 | 25.17 | 26.90 | 39.77 | |||||||||||||
1962 | 23.48 | 29.14 | 29.61 | 39.83 | 42.97 | 47.86 | b | 52.26 | 52.74 | 48.17 | 40.87 | 35.63 | 32.00 | 39.55 | ||||||||||||
1963 | 19.58 | 30.75 | 33.23 | 38.57 | 44.16 | 50.57 | 52.16 | 53.68 | 52.00 | 42.10 | 34.31 | a | 27.17 | a | 39.86 | |||||||||||
1964 | ----- | z | 26.83 | 30.39 | 35.70 | 41.74 | 50.47 | 54.52 | 51.26 | 45.67 | 38.26 | 32.40 | 22.71 | 39.08 | a | |||||||||||
1965 | 27.13 | a | 31.75 | 29.26 | 39.13 | 42.42 | 50.17 | 55.19 | 56.03 | 45.37 | 42.26 | 37.03 | 27.00 | 40.23 | ||||||||||||
1966 | 29.16 | 29.39 | 32.87 | 38.37 | 44.74 | 49.07 | 53.19 | 54.74 | 50.70 | 39.84 | 35.13 | 32.10 | 40.78 | |||||||||||||
1967 | 32.68 | 31.79 | 32.39 | 34.41 | c | 43.87 | 53.13 | 54.70 | a | 55.97 | 50.93 | 40.81 | 31.73 | 25.90 | 40.69 | |||||||||||
1968 | 27.00 | 31.93 | 36.13 | 36.20 | 43.74 | 49.03 | 55.00 | 52.61 | 46.90 | 35.10 | 32.30 | 20.84 | 38.90 | |||||||||||||
1969 | 13.35 | 22.93 | 32.52 | 37.63 | 46.84 | 54.37 | 50.23 | 48.06 | 47.10 | 33.71 | 29.90 | 27.32 | 37.00 | |||||||||||||
1970 | 22.16 | 30.71 | 32.29 | 34.87 | 41.77 | 51.37 | 52.48 | 49.03 | 42.27 | 35.10 | 29.80 | 23.68 | 37.13 | |||||||||||||
1971 | 27.68 | 27.75 | 28.71 | 35.10 | 43.94 | 45.83 | 51.94 | 52.68 | 39.77 | 33.74 | 30.13 | 24.45 | b | 36.81 | ||||||||||||
1972 | 22.23 | 27.00 | 33.71 | 34.17 | 46.81 | 51.27 | 54.65 | 54.03 | 42.53 | 35.90 | 31.83 | 18.48 | 37.72 | |||||||||||||
1973 | 21.65 | 29.18 | 32.06 | 36.47 | 43.87 | 49.47 | 53.26 | 50.10 | 46.53 | 37.55 | 31.83 | 30.31 | b | 38.52 | ||||||||||||
1974 | 20.03 | 29.46 | 32.52 | 38.03 | 41.16 | 50.33 | 52.23 | 50.97 | 45.00 | 34.68 | 32.33 | 27.65 | 37.87 | |||||||||||||
1975 | 23.84 | 24.18 | 28.97 | 32.60 | 41.26 | 47.80 | 56.90 | 49.19 | 43.33 | 37.65 | 28.50 | 26.87 | 36.76 | |||||||||||||
1976 | 26.19 | 25.83 | 28.55 | 36.73 | 43.03 | 46.33 | 52.10 | 52.39 | 47.80 | 35.23 | a | 28.90 | 21.52 | 37.05 | ||||||||||||
1977 | 18.52 | 28.57 | 32.16 | 40.24 | a | 41.84 | 52.60 | 51.77 | 57.65 | 45.50 | 35.97 | 28.60 | 27.94 | 38.45 | ||||||||||||
1978 | 26.13 | 31.30 | a | 35.42 | 39.00 | 41.93 | a | 51.00 | 54.65 | 53.23 | 46.70 | 35.13 | 25.30 | 20.81 | 38.38 | |||||||||||
1979 | 8.23 | 27.82 | 33.06 | 37.73 | 44.97 | 49.13 | 53.43 | a | 53.26 | 47.53 | 41.06 | 27.53 | 28.65 | 37.70 | ||||||||||||
1980 | 14.90 | a | 27.07 | a | 31.26 | 40.13 | 44.84 | 47.93 | 51.84 | 48.65 | 47.33 | 36.23 | 32.97 | 30.00 | 37.76 | |||||||||||
1981 | 30.87 | 29.18 | 34.23 | 36.73 | 43.26 | 47.80 | 50.94 | 53.87 | 45.27 | 35.61 | 30.27 | 24.23 | 38.52 | |||||||||||||
1982 | 19.79 | b | 27.07 | a | 30.93 | a | 33.63 | 43.26 | 52.17 | 52.35 | 52.81 | 46.47 | 36.69 | b | 27.57 | 25.61 | 37.36 | |||||||||
1983 | 30.23 | a | 32.11 | 37.30 | a | 36.37 | 43.61 | 46.93 | 52.03 | 55.00 | 43.30 | 36.48 | b | 35.93 | a | 18.75 | c | 39.00 | ||||||||
1984 | 25.83 | a | 31.21 | 36.57 | a | ----- | z | 41.93 | a | 49.80 | 52.32 | 52.35 | 45.03 | 34.77 | 32.67 | 21.13 | a | 38.51 | a | |||||||
1985 | 23.70 | a | 22.32 | 30.70 | a | 39.31 | a | 46.42 | 50.83 | 57.81 | 52.26 | 45.28 | a | 37.30 | a | 19.34 | a | 18.61 | 36.99 | |||||||
1986 | 27.82 | c | 31.58 | b | 38.03 | a | 36.37 | ----- | z | ----- | z | ----- | z | 56.61 | 47.37 | 40.35 | 33.57 | 26.23 | 37.55 | c | ||||||
1987 | 26.03 | a | ----- | z | 35.77 | 41.93 | 47.26 | 51.50 | 54.29 | 53.13 | 47.67 | 38.39 | 32.83 | 25.68 | 41.32 | a | ||||||||||
1988 | 25.10 | 29.66 | 33.13 | 41.30 | 44.13 | 51.17 | 54.45 | 51.74 | 45.60 | 43.87 | 36.00 | 26.87 | 40.25 | |||||||||||||
1989 | 29.30 | a | 19.00 | 34.29 | ----- | z | 45.19 | 52.97 | 52.26 | 54.39 | ----- | z | 39.71 | 35.83 | 27.93 | a | 39.09 | b | ||||||||
1990 | 33.00 | 28.14 | 33.10 | 41.70 | 44.03 | 51.80 | 58.10 | 56.84 | 51.10 | ----- | z | 34.93 | 18.80 | a | 41.05 | a | ||||||||||
1991 | 21.42 | 30.65 | b | 33.39 | c | 38.57 | 44.71 | 49.00 | 55.16 | 56.81 | 48.20 | 37.94 | 35.00 | a | 30.57 | a | 40.12 | |||||||||
1992 | ----- | z | ----- | z | ----- | z | 41.43 | 46.16 | 54.47 | 55.58 | 53.68 | 45.67 | 41.42 | 33.63 | 23.57 | a | 43.96 | c | ||||||||
1993 | 17.52 | 24.79 | ----- | z | 38.73 | 49.58 | 49.50 | 50.42 | 51.87 | 45.20 | 39.42 | 22.93 | 30.33 | a | 38.21 | a | ||||||||||
1994 | 31.32 | 27.82 | 34.10 | ----- | z | 47.61 | 49.00 | 55.00 | 52.65 | ----- | z | ----- | z | ----- | z | ----- | z | 42.50 | e | |||||||
1995 | ----- | z | ----- | z | ----- | z | ----- | z | 46.81 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.81 | k | |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.20 | 34.20 | a | 26.62 | a | 21.00 | b | 30.76 | h | |
1997 | 22.74 | 29.07 | a | 34.84 | 37.66 | a | 49.65 | 52.70 | 58.40 | a | 59.90 | b | 50.79 | a | 38.80 | a | 32.54 | b | 25.31 | b | 41.03 | |||||
1998 | 25.20 | a | 31.07 | ----- | z | 38.14 | a | 46.87 | a | 54.31 | a | 62.68 | 56.87 | ----- | z | 35.10 | 32.71 | b | 24.59 | d | 40.75 | b | ||||
1999 | 30.97 | b | 29.70 | a | 33.20 | a | 36.83 | a | 42.30 | a | 52.76 | a | 56.13 | 57.62 | b | 46.30 | c | 36.59 | b | 34.07 | a | 30.77 | e | 40.60 | ||
2000 | 24.83 | a | 28.03 | 33.23 | a | 39.27 | 45.29 | 52.55 | a | 56.48 | 53.52 | 45.90 | a | 36.10 | 22.59 | a | 24.12 | f | 39.80 | a | ||||||
2001 | 24.53 | a | 22.85 | a | 30.97 | 35.29 | b | 45.24 | b | 48.27 | 55.77 | 56.13 | a | 46.14 | b | 35.57 | c | 30.29 | b | 23.53 | a | 37.88 | ||||
2002 | 26.12 | e | 22.73 | b | 26.68 | c | 40.03 | 47.35 | 56.37 | 61.87 | 58.17 | b | 50.41 | a | 38.19 | 31.93 | 32.23 | a | 41.01 | |||||||
2003 | 33.84 | 31.44 | a | 39.57 | a | 41.73 | 47.13 | 57.27 | 62.03 | a | 59.48 | 52.83 | 46.06 | 28.00 | a | 29.40 | a | 44.07 | ||||||||
2004 | 25.28 | b | 30.21 | 39.10 | 41.80 | 49.39 | 56.10 | 62.61 | 62.65 | 51.79 | a | 43.74 | 31.66 | a | 29.61 | 43.66 | ||||||||||
2005 | 26.61 | 27.32 | 38.20 | a | 41.80 | 52.42 | 52.72 | a | 61.20 | a | 59.81 | 50.40 | 43.87 | 32.60 | 22.00 | 42.41 | ||||||||||
2006 | 33.42 | 28.37 | a | 34.74 | 41.20 | 47.94 | 56.17 | 63.35 | 58.10 | 51.13 | 41.23 | 34.97 | a | 24.48 | 42.92 | |||||||||||
2007 | 23.61 | 31.93 | a | 38.10 | a | 39.55 | a | 47.16 | 53.66 | a | 63.97 | a | 57.00 | 50.76 | a | 40.97 | 30.86 | a | 25.58 | e | 41.93 | |||||
2008 | 22.39 | c | 32.28 | 33.53 | a | 35.97 | 50.62 | b | 51.90 | 60.58 | ----- | z | 50.17 | a | 39.54 | e | 35.70 | ----- | z | 41.27 | b | |||||
2009 | ----- | z | ----- | z | ----- | z | ----- | z | 45.60 | a | 55.57 | b | ----- | z | 58.11 | c | 49.97 | a | 38.64 | c | 31.77 | 18.27 | a | 42.56 | e | |
2010 | ----- | z | 32.92 | c | 33.60 | a | 40.87 | ----- | z | 49.71 | b | 58.63 | a | 53.48 | b | 45.71 | b | 42.63 | a | 28.86 | a | 29.19 | e | 41.56 | b | |
2011 | 27.40 | a | 24.23 | f | 27.72 | m | 31.64 | e | 43.87 | a | 47.93 | 49.64 | f | 58.45 | b | 53.00 | a | 42.57 | c | 27.36 | b | 23.08 | f | 41.53 | d | |
2012 | 25.06 | n | ----- | z | 34.25 | g | ----- | z | ----- | z | ----- | z | 59.57 | c | 56.30 | a | 50.62 | a | 40.26 | 35.24 | a | 28.06 | 45.01 | f | ||
2013 | 23.61 | 26.81 | b | 33.97 | ----- | z | 48.21 | b | 55.43 | 61.45 | 58.97 | 55.30 | 39.07 | c | 29.13 | 18.63 | a | 40.96 | a | |||||||
2014 | 27.87 | a | 26.64 | 34.90 | 41.57 | 47.94 | ----- | z | ----- | z | ----- | z | 52.87 | 47.00 | 29.20 | 29.68 | 37.52 | c | ||||||||
2015 | 29.16 | 33.57 | 38.39 | 40.03 | 52.00 | 62.67 | 63.90 | 60.17 | a | 48.76 | a | 46.19 | 29.45 | a | 29.52 | 44.48 | ||||||||||
2016 | 28.10 | 32.89 | a | 37.13 | 45.43 | b | 50.73 | a | 55.93 | 59.84 | 58.70 | a | 49.43 | b | 44.16 | 37.97 | 19.57 | c | 43.32 | |||||||
2017 | 16.16 | 24.41 | a | 36.84 | 38.90 | 47.65 | 54.14 | a | 61.26 | 60.45 | 52.27 | 39.06 | 32.73 | 25.16 | 40.75 | |||||||||||
2018 | 32.00 | 28.19 | a | 32.67 | a | 39.82 | b | 52.63 | d | 53.90 | a | 60.24 | b | 58.42 | 47.52 | a | 40.00 | a | 30.60 | 30.29 | 42.19 | |||||
2019 | 28.68 | 17.32 | 25.10 | a | 42.63 | c | 49.47 | a | 54.10 | a | 58.87 | a | 60.07 | a | 51.87 | 35.52 | 27.90 | 26.34 | b | 39.82 | ||||||
2020 | 30.77 | 29.17 | 33.39 | 39.70 | 48.35 | 54.31 | a | 59.19 | 58.84 | 52.18 | b | 41.47 | a | 32.17 | a | 28.14 | b | 42.31 | ||||||||
2021 | 30.67 | a | 26.59 | a | 33.44 | f | 40.31 | q | 48.62 | o | 64.21 | p | 63.25 | g | 60.06 | 50.69 | a | 42.30 | a | 35.40 | 27.32 | c | 39.00 | e | ||
2022 | 22.62 | e | 24.62 | d | 35.25 | k | 35.53 | 43.62 | b | 53.55 | a | 62.58 | 62.42 | 52.57 | 45.90 | a | 26.17 | 17.16 | 40.61 | a | ||||||
2023 | 26.47 | a | 26.79 | 30.20 | a | 38.24 | a | 51.37 | a | 55.78 | c | 55.96 | g | 57.63 | d | 51.04 | b | 38.85 | k | 24.36 | p | 21.78 | m | 42.19 | d | |
2024 | 20.15 | e | 36.00 | y | 32.44 | v | 42.00 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.15 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.98 | 27.67 | 32.66 | 37.77 | 44.95 | 50.89 | 55.03 | 54.04 | 47.52 | 39.11 | 30.90 | 25.97 | 39.18 | |||||||||||||
S.D. | 6.66 | 4.19 | 2.97 | 2.66 | 3.14 | 3.10 | 3.76 | 3.53 | 2.96 | 3.08 | 3.90 | 3.88 | 2.03 | |||||||||||||
SKEW | -1.05 | -1.20 | -0.01 | 0.19 | 0.44 | 0.72 | 0.83 | 0.44 | 0.15 | 0.30 | -0.57 | -0.36 | 0.84 | |||||||||||||
MAX | 36.03 | 36.07 | 39.57 | 45.43 | 52.63 | 62.67 | 63.97 | 62.65 | 55.30 | 47.00 | 37.97 | 34.23 | 44.48 | |||||||||||||
MIN | 4.39 | 12.57 | 25.10 | 31.64 | 39.16 | 45.60 | 49.50 | 48.06 | 39.77 | 33.71 | 19.34 | 17.16 | 36.37 | |||||||||||||
YRS | 89 | 89 | 87 | 89 | 91 | 90 | 89 | 91 | 92 | 94 | 92 | 90 | 66 |