YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.13 | 53.13 | 50.83 | a | 42.65 | 39.69 | a | 36.32 | 45.79 | f | ||||
1926 | 34.37 | a | 40.00 | 38.84 | 42.60 | 44.37 | a | 48.80 | 50.06 | 52.06 | 44.57 | 46.00 | 40.53 | 34.77 | 43.08 | |||||||||||
1927 | 32.68 | 33.86 | 35.42 | 37.80 | 43.45 | 49.40 | 51.45 | 52.58 | 49.93 | 44.77 | 40.28 | a | 31.06 | 41.89 | ||||||||||||
1928 | 32.94 | 33.28 | 40.06 | 40.77 | 44.32 | 50.33 | 53.52 | 47.52 | 47.79 | a | 44.84 | 37.60 | 30.17 | a | 41.93 | |||||||||||
1929 | 28.00 | b | 24.89 | 36.84 | 37.03 | 41.58 | 47.03 | 46.06 | 48.06 | 43.62 | a | 42.77 | 32.57 | 37.81 | 38.86 | |||||||||||
1930 | 18.76 | b | 37.00 | 35.23 | 41.23 | 39.81 | 45.50 | 46.35 | 49.03 | 49.23 | 38.58 | 36.20 | 31.20 | a | 39.01 | |||||||||||
1931 | 35.00 | 31.79 | 36.55 | 36.83 | 43.13 | 46.00 | 49.52 | 48.87 | 48.57 | 42.16 | 33.10 | 33.52 | 40.42 | |||||||||||||
1932 | 32.07 | a | 32.79 | 38.48 | 40.13 | 41.87 | 47.23 | 47.90 | a | 52.55 | 45.50 | 44.23 | 40.63 | 25.58 | 40.75 | |||||||||||
1933 | 34.03 | 31.21 | 37.35 | 36.83 | 42.90 | 46.43 | 48.32 | 52.23 | a | 47.37 | 45.10 | 38.47 | 39.55 | 41.65 | ||||||||||||
1934 | 39.03 | 35.93 | 38.97 | a | 43.47 | 46.35 | 45.23 | 49.71 | 52.52 | 48.17 | a | 43.71 | 43.00 | a | 36.00 | a | 43.51 | |||||||||
1935 | 31.90 | 34.18 | 34.23 | 36.47 | 38.84 | 46.70 | 49.71 | 48.94 | 47.87 | 39.90 | 31.57 | 31.03 | 39.28 | |||||||||||||
1936 | 35.55 | 27.31 | 32.94 | 41.43 | 45.16 | 49.83 | 47.71 | 47.97 | 45.45 | a | 41.84 | 29.87 | 37.10 | 40.18 | ||||||||||||
1937 | 22.00 | 31.82 | 37.87 | 37.97 | a | 41.71 | 50.20 | 50.68 | 50.06 | 50.37 | 45.16 | 42.70 | 35.81 | 41.36 | ||||||||||||
1938 | 32.90 | 32.79 | 35.65 | 38.93 | 40.94 | 47.83 | 50.77 | 48.23 | 51.43 | 41.77 | 33.13 | 32.81 | 40.60 | |||||||||||||
1939 | 35.97 | 30.43 | 34.90 | 37.30 | 40.32 | 46.53 | 49.35 | 50.32 | 48.90 | 43.65 | 36.63 | 38.52 | 41.07 | |||||||||||||
1940 | 32.26 | 37.59 | 37.48 | 38.90 | 42.90 | 44.97 | 51.23 | 49.90 | a | 51.00 | 46.10 | 33.37 | 34.00 | 41.64 | ||||||||||||
1941 | 34.45 | 32.36 | 36.61 | 38.67 | 44.48 | 48.47 | 53.66 | b | 54.48 | b | 49.17 | 43.23 | 39.50 | 35.10 | 42.51 | |||||||||||
1942 | 28.35 | 33.21 | 32.23 | 40.04 | b | 44.94 | 47.73 | 54.31 | b | 54.26 | 47.43 | 41.16 | 36.80 | 36.68 | 41.43 | |||||||||||
1943 | 25.94 | 32.04 | 32.32 | 40.23 | 41.19 | 47.00 | 50.87 | 49.26 | 47.53 | 43.45 | 35.13 | 30.87 | 39.65 | |||||||||||||
1944 | 30.48 | 31.55 | 32.29 | 39.33 | 40.65 | 46.17 | 51.52 | 49.58 | 49.73 | 45.16 | 36.14 | a | 28.13 | 40.06 | ||||||||||||
1945 | 32.29 | 34.39 | 33.71 | 36.87 | 45.20 | a | 42.40 | 49.26 | 50.19 | 45.70 | 41.30 | a | 37.00 | 34.16 | 40.21 | |||||||||||
1946 | 33.37 | a | 33.36 | 35.47 | a | 37.67 | 43.77 | 47.27 | 51.61 | 50.58 | 47.10 | 38.65 | 31.80 | 33.87 | 40.38 | |||||||||||
1947 | 28.58 | 34.04 | 36.13 | 40.27 | 42.86 | c | 48.60 | 50.23 | 49.87 | 47.87 | 45.48 | 38.83 | 36.23 | a | 41.58 | |||||||||||
1948 | 31.67 | a | 31.64 | a | 33.71 | 38.37 | 43.97 | 50.57 | 49.19 | 52.16 | 46.41 | a | 40.39 | 35.37 | 30.71 | 40.35 | ||||||||||
1949 | 21.03 | 30.29 | 35.29 | 37.50 | 43.61 | 44.34 | a | 47.68 | 49.35 | 48.87 | 37.68 | 40.33 | 33.35 | 39.11 | ||||||||||||
1950 | 20.90 | 32.46 | 35.37 | a | 35.97 | 38.55 | 48.53 | 49.23 | 51.43 | a | 46.34 | a | 41.42 | 38.30 | 40.19 | 39.89 | ||||||||||
1951 | 32.35 | 33.43 | 31.71 | 36.90 | 42.13 | 47.93 | 50.58 | 47.81 | 47.93 | 43.29 | 36.57 | 31.23 | 40.15 | |||||||||||||
1952 | 29.87 | 34.07 | 34.55 | 36.07 | 40.87 | 46.43 | 51.71 | 52.81 | 48.80 | 44.74 | 32.20 | 34.74 | 40.57 | |||||||||||||
1953 | 40.94 | 34.21 | 35.97 | 37.87 | 42.68 | 47.30 | 49.97 | 52.65 | 48.57 | 42.42 | 40.70 | 35.97 | a | 42.44 | ||||||||||||
1954 | 30.87 | a | 33.70 | a | 29.68 | 36.10 | 43.21 | c | 46.27 | 48.55 | 51.71 | 50.33 | 40.90 | a | 41.83 | 34.06 | 40.60 | |||||||||
1955 | 33.58 | 31.82 | 31.03 | 35.73 | 39.94 | 48.60 | 50.68 | 48.90 | 46.73 | 46.06 | 33.80 | 33.77 | 40.05 | |||||||||||||
1956 | 34.52 | 29.57 | a | 34.74 | 40.85 | c | 45.63 | a | 47.73 | 51.23 | 51.81 | 47.90 | 43.39 | 34.77 | 35.03 | b | 41.43 | |||||||||
1957 | 25.77 | 33.44 | a | 37.00 | b | 40.43 | 46.97 | 49.60 | 50.19 | 50.13 | 50.03 | a | 43.00 | 33.07 | 37.87 | 41.46 | ||||||||||
1958 | 36.55 | 40.11 | 35.23 | 39.40 | 46.23 | 54.27 | 55.39 | 51.61 | 48.27 | 43.52 | 39.27 | 39.61 | 44.12 | |||||||||||||
1959 | 36.42 | 35.86 | 37.52 | 40.37 | 42.19 | 49.63 | 51.90 | 48.74 | 49.60 | 45.03 | 36.87 | 34.77 | 42.41 | |||||||||||||
1960 | 32.10 | 34.52 | 37.32 | 40.07 | 42.87 | 46.60 | 49.55 | 51.65 | 48.07 | 44.97 | 37.83 | 33.32 | 41.57 | |||||||||||||
1961 | 36.97 | 41.64 | 39.48 | 39.00 | 44.77 | 49.93 | 52.42 | 53.45 | 44.80 | 42.00 | 33.27 | 35.19 | 42.74 | |||||||||||||
1962 | 31.39 | 36.11 | 35.23 | 39.60 | 41.97 | a | 45.90 | 49.10 | a | 51.42 | 49.57 | 45.65 | 40.17 | 35.77 | 41.82 | |||||||||||
1963 | 28.81 | 39.71 | 36.48 | 40.70 | 42.68 | 47.47 | 50.17 | a | 52.45 | 52.37 | 45.68 | 40.53 | 34.71 | 42.65 | ||||||||||||
1964 | 35.97 | 32.03 | 35.13 | 37.03 | 40.52 | 47.03 | 50.71 | 50.74 | 48.47 | 42.00 | 36.87 | 31.29 | 40.65 | |||||||||||||
1965 | 34.52 | 35.61 | 32.94 | 39.17 | 41.19 | 44.37 | 51.35 | 53.48 | 45.57 | 44.42 | 41.43 | 33.90 | 41.50 | |||||||||||||
1966 | 34.68 | 32.36 | 34.94 | 39.23 | 41.10 | 47.10 | 50.13 | 49.65 | 49.93 | 42.03 | 38.83 | a | 38.58 | 41.55 | ||||||||||||
1967 | 37.65 | 34.04 | 35.10 | 35.37 | 42.35 | 50.87 | 50.68 | 52.97 | 49.90 | 44.97 | 38.38 | a | 34.94 | 42.27 | ||||||||||||
1968 | 33.97 | 34.45 | 37.97 | 36.00 | 43.58 | 47.50 | 50.87 | 50.84 | 49.30 | 41.42 | 39.13 | 32.13 | 41.43 | |||||||||||||
1969 | 27.10 | 31.82 | 34.03 | 38.70 | 44.81 | 54.53 | 50.10 | 47.71 | 48.60 | 39.65 | 39.50 | 36.70 | a | 41.10 | ||||||||||||
1970 | 33.81 | 34.32 | 34.58 | 36.60 | 41.26 | 48.30 | 49.52 | 49.32 | 45.50 | 39.90 | 37.00 | 34.23 | 40.36 | |||||||||||||
1971 | 34.50 | a | 34.39 | 33.23 | 36.30 | 43.32 | 46.66 | a | 51.06 | 52.65 | 45.17 | 40.71 | 39.07 | 33.00 | 40.84 | |||||||||||
1972 | 30.39 | 33.48 | 37.68 | 34.90 | 44.13 | 48.47 | 51.81 | 51.00 | a | 45.67 | 40.48 | 38.80 | 30.71 | 40.63 | ||||||||||||
1973 | 32.00 | 33.32 | 37.26 | 38.07 | 42.68 | 47.57 | 50.90 | 48.06 | 47.60 | 43.65 | 37.27 | 38.61 | 41.42 | |||||||||||||
1974 | 29.07 | a | 36.00 | 36.55 | 40.27 | 41.87 | 47.17 | a | 50.58 | 52.10 | 49.33 | 40.13 | ----- | z | 37.55 | 41.87 | a | |||||||||
1975 | 34.81 | 33.81 | a | 34.52 | 34.37 | 41.65 | 47.83 | 52.13 | 50.77 | 49.03 | 45.13 | 37.80 | 35.77 | 41.47 | ||||||||||||
1976 | 35.23 | 32.97 | 33.13 | 37.27 | 42.61 | 46.10 | 49.87 | a | 52.23 | 49.70 | 42.71 | 38.43 | 34.58 | 41.23 | ||||||||||||
1977 | 29.81 | 34.43 | 34.70 | a | 37.50 | 41.83 | a | 47.80 | 48.52 | 54.48 | 48.40 | 42.37 | a | 36.63 | 36.58 | 41.09 | ||||||||||
1978 | 36.65 | 37.86 | 38.48 | 40.47 | 42.71 | 50.20 | 52.68 | 52.55 | 50.53 | 42.71 | 31.33 | 30.70 | a | 42.24 | ||||||||||||
1979 | 25.27 | a | 34.82 | 36.90 | 41.13 | 44.19 | 46.67 | 51.45 | 52.61 | 52.20 | 46.45 | 35.63 | 38.65 | 42.16 | ||||||||||||
1980 | 27.77 | 35.93 | 37.10 | 40.07 | 43.77 | 48.77 | 52.94 | 50.48 | 49.40 | 42.35 | 41.33 | 38.39 | 42.36 | |||||||||||||
1981 | 35.68 | 35.46 | 36.90 | 40.70 | 44.10 | 48.37 | 51.87 | 54.16 | 50.07 | 42.61 | 39.27 | 36.97 | 43.01 | |||||||||||||
1982 | 33.19 | 34.11 | a | 35.13 | 35.72 | a | 42.84 | 49.63 | 51.71 | 52.27 | a | 50.37 | 44.52 | 35.28 | a | 34.67 | a | 41.62 | ||||||||
1983 | 37.87 | a | 39.36 | 41.13 | a | 38.90 | a | 46.55 | 49.90 | a | 52.90 | a | 53.23 | 46.45 | a | 41.26 | 42.83 | 29.87 | a | 43.35 | ||||||
1984 | 35.45 | 36.14 | 39.52 | 38.76 | a | 42.39 | 46.97 | ----- | z | 49.00 | 47.70 | 42.45 | 38.97 | 31.26 | 40.78 | a | ||||||||||
1985 | 27.74 | 31.11 | 33.35 | 40.43 | 43.13 | 45.83 | 51.42 | 50.03 | 46.93 | 41.87 | 29.80 | 26.37 | a | 39.00 | ||||||||||||
1986 | 35.13 | 35.86 | 39.61 | 37.87 | 43.19 | 50.40 | 51.74 | 53.74 | 49.03 | 45.33 | a | 40.52 | a | 34.77 | 43.10 | |||||||||||
1987 | 33.87 | 37.21 | 39.61 | 40.83 | 46.81 | 48.70 | 52.58 | 52.00 | 50.37 | 41.90 | 41.70 | 33.52 | 43.26 | |||||||||||||
1988 | 33.74 | 36.59 | 36.45 | 40.33 | 44.39 | 47.77 | 51.03 | 51.37 | a | 47.27 | 49.48 | 41.00 | 35.16 | 42.88 | ||||||||||||
1989 | 35.93 | a | 27.25 | 36.87 | 41.90 | 45.16 | 50.23 | 51.67 | a | 52.81 | 48.07 | 44.58 | 41.33 | 36.13 | 42.66 | |||||||||||
1990 | 36.19 | 33.11 | 37.90 | 43.27 | 45.27 | a | 50.38 | a | 53.28 | b | 54.03 | a | 53.50 | 42.00 | 40.40 | 28.06 | 43.12 | |||||||||
1991 | 31.52 | 39.30 | a | 35.71 | 40.07 | 43.80 | a | 48.20 | 52.57 | a | 54.19 | 50.00 | d | 41.14 | c | 40.40 | 36.94 | 42.82 | ||||||||
1992 | 37.17 | a | 39.25 | a | 40.13 | 42.03 | 44.00 | a | 50.52 | c | 54.93 | a | 51.61 | 47.57 | b | 45.55 | b | 39.00 | a | 34.13 | 43.82 | |||||
1993 | 29.03 | a | 28.93 | a | 37.30 | a | 42.00 | a | 48.37 | a | 50.52 | a | 53.10 | a | 53.62 | b | 47.64 | b | 45.61 | 32.21 | a | 35.29 | 41.97 | |||
1994 | 39.19 | 31.62 | b | 39.33 | a | 42.43 | 45.31 | b | 48.47 | 52.10 | b | 52.42 | 50.89 | b | 40.74 | 35.76 | a | 36.40 | a | 42.89 | ||||||
1995 | 35.53 | a | 37.76 | c | 36.20 | a | 39.07 | 45.93 | a | 49.70 | 54.97 | a | 51.03 | 53.31 | a | 43.90 | a | 42.59 | a | 35.30 | a | 43.77 | ||||
1996 | 36.48 | 33.25 | a | 36.58 | 42.87 | ----- | z | 47.59 | a | 53.74 | 52.26 | 47.89 | c | 42.32 | c | 38.10 | 36.55 | 42.51 | a | |||||||
1997 | 35.27 | a | 35.00 | 37.33 | a | 39.21 | a | 47.03 | ----- | z | 52.45 | 55.40 | a | ----- | z | 45.42 | 40.63 | 35.13 | 42.29 | b | ||||||
1998 | 37.87 | 39.43 | 39.32 | 39.57 | 47.45 | 51.70 | 57.03 | 52.24 | b | 49.53 | 44.10 | 43.48 | a | 35.10 | 44.74 | |||||||||||
1999 | 35.69 | r | ----- | z | 37.71 | x | 37.40 | 40.63 | d | 49.36 | e | 51.39 | c | 55.71 | 47.61 | b | 43.17 | a | 42.68 | b | 37.52 | 45.05 | c | |||
2000 | 34.10 | b | 35.93 | 36.43 | a | 41.43 | b | 45.97 | a | 48.27 | 53.73 | a | 51.74 | 49.04 | c | 44.28 | b | 34.66 | a | 33.47 | a | 42.42 | ||||
2001 | 34.73 | a | 31.85 | a | 36.80 | a | 38.27 | 43.67 | a | 47.50 | ----- | z | 54.18 | c | 49.62 | a | ----- | z | 40.70 | c | 35.24 | b | 41.26 | b | ||
2002 | 36.47 | a | 35.04 | a | 35.53 | a | 41.26 | c | 43.40 | f | ----- | z | 53.74 | 51.97 | a | 49.04 | c | 43.50 | a | 39.03 | a | 37.41 | b | 42.30 | b | |
2003 | 38.41 | b | ----- | z | 41.00 | a | 41.70 | 44.77 | 51.17 | 52.50 | a | 52.68 | 51.04 | b | 49.32 | 36.33 | 37.00 | 45.08 | a | |||||||
2004 | 34.43 | a | 36.36 | a | 39.32 | 41.17 | 48.26 | 51.73 | 55.83 | a | 57.52 | 51.37 | 47.81 | 38.93 | a | 37.68 | 45.03 | |||||||||
2005 | 36.42 | 31.43 | 40.20 | a | 42.43 | 49.80 | a | 51.14 | a | 55.83 | a | 53.63 | a | 46.21 | b | 48.26 | 37.47 | 35.77 | 44.05 | |||||||
2006 | 41.26 | 33.57 | 38.58 | 41.10 | 46.00 | 52.70 | 54.71 | 52.40 | a | 49.77 | 43.71 | 40.50 | 34.65 | 44.08 | ||||||||||||
2007 | 31.58 | g | 37.89 | a | 42.10 | 41.90 | 44.29 | 50.53 | 56.77 | 54.39 | 50.33 | 43.87 | 38.63 | ----- | z | 46.07 | b | |||||||||
2008 | 31.00 | j | 36.39 | a | 37.23 | 37.83 | 48.06 | 48.67 | 52.97 | 55.16 | 50.60 | 44.43 | a | 43.50 | 33.63 | a | 44.41 | a | ||||||||
2009 | 33.61 | 32.82 | 36.68 | 39.40 | 44.26 | 51.70 | 56.10 | 55.42 | 51.17 | 45.29 | 41.43 | 29.55 | 43.12 | |||||||||||||
2010 | 40.87 | 39.04 | 39.39 | 41.67 | 44.71 | 49.83 | 53.42 | 54.13 | 53.30 | 45.97 | 39.60 | 38.13 | 45.00 | |||||||||||||
2011 | 36.97 | 33.75 | 39.84 | 38.87 | 43.58 | 50.77 | 52.68 | 55.13 | 53.17 | 47.68 | 38.00 | 33.94 | 43.70 | |||||||||||||
2012 | 35.03 | 36.34 | 37.48 | 43.40 | 45.32 | 50.50 | 54.65 | 54.74 | 50.43 | 46.16 | 42.53 | 38.45 | 44.59 | |||||||||||||
2013 | 33.23 | 38.65 | h | ----- | z | ----- | z | 47.91 | t | 52.52 | a | 54.19 | d | 56.78 | v | ----- | z | 43.70 | d | 39.67 | f | 32.93 | c | 43.31 | g | |
2014 | 36.38 | b | 35.85 | h | 38.90 | a | 42.00 | 48.16 | 50.69 | a | 55.55 | b | 57.46 | e | 53.93 | 50.94 | 37.83 | 39.26 | 46.46 | a | ||||||
2015 | 38.58 | 41.57 | 41.48 | 41.10 | 48.74 | 53.07 | 56.94 | 55.45 | 50.23 | 49.84 | 35.97 | 38.77 | 45.98 | |||||||||||||
2016 | 37.45 | 41.14 | 41.40 | a | 43.80 | 48.71 | 51.13 | 55.39 | 54.26 | 48.93 | b | 49.47 | a | 44.83 | 32.26 | 45.73 | ||||||||||
2017 | 28.20 | a | 34.86 | 41.19 | 41.90 | 47.23 | 51.37 | 51.53 | a | 55.06 | 50.80 | 41.71 | 41.33 | 32.77 | a | 43.16 | ||||||||||
2018 | 39.94 | 34.57 | 37.06 | 42.77 | 48.90 | 50.21 | a | 54.90 | 55.13 | a | 48.66 | a | 44.03 | 39.31 | a | 36.10 | 44.30 | |||||||||
2019 | 35.29 | 31.18 | 33.03 | 43.73 | 49.00 | 51.17 | 55.39 | 56.32 | 54.03 | a | 39.06 | 36.80 | 38.16 | 43.60 | ||||||||||||
2020 | 41.26 | 35.45 | 35.58 | 41.60 | 47.58 | 51.80 | 54.19 | 54.39 | 54.17 | 45.45 | 39.47 | 37.19 | 44.84 | |||||||||||||
2021 | 38.97 | 36.79 | 35.23 | 38.87 | 45.35 | 53.28 | a | 55.14 | b | 55.74 | 50.60 | 44.71 | 43.97 | 35.43 | a | 44.51 | ||||||||||
2022 | 35.43 | a | 35.57 | 40.42 | 37.73 | 45.27 | a | 51.53 | 56.48 | 57.00 | b | 52.45 | a | 47.29 | 33.55 | a | 34.42 | 43.93 | ||||||||
2023 | 37.40 | a | 34.29 | 36.29 | 41.53 | 48.64 | c | 48.54 | b | 53.67 | a | 56.70 | a | 49.86 | b | 44.97 | a | 38.52 | a | 38.82 | c | 44.10 | ||||
2024 | 36.81 | d | 39.34 | 39.13 | a | 39.96 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.43 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.50 | 34.48 | 36.63 | 39.45 | 44.05 | 48.77 | 51.91 | 52.18 | 49.04 | 43.70 | 38.10 | 34.77 | 42.08 | |||||||||||||
S.D. | 4.46 | 3.12 | 2.55 | 2.25 | 2.49 | 2.28 | 2.40 | 2.40 | 2.22 | 2.57 | 3.33 | 2.96 | 1.65 | |||||||||||||
SKEW | -0.98 | -0.01 | -0.11 | -0.11 | 0.25 | 0.10 | 0.11 | 0.04 | 0.11 | 0.32 | -0.46 | -0.67 | 0.17 | |||||||||||||
MAX | 41.26 | 41.64 | 42.10 | 43.80 | 49.80 | 54.53 | 57.03 | 57.52 | 54.17 | 50.94 | 44.83 | 40.19 | 45.98 | |||||||||||||
MIN | 18.76 | 24.89 | 29.68 | 34.37 | 38.55 | 42.40 | 46.06 | 47.52 | 43.62 | 37.68 | 29.80 | 25.58 | 38.86 | |||||||||||||
YRS | 96 | 95 | 97 | 97 | 95 | 96 | 97 | 98 | 97 | 98 | 97 | 98 | 86 |