YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1930 | 29.27 | p | 39.89 | a | 39.26 | 44.23 | 44.81 | 49.00 | 51.48 | 53.68 | 50.03 | 40.65 | 41.73 | 41.32 | 45.10 | a | ||||||||||
1931 | 45.26 | 37.36 | 40.00 | 41.40 | 46.45 | 50.00 | 53.45 | 56.45 | 58.48 | c | 55.42 | 45.13 | 37.03 | 47.20 | ||||||||||||
1932 | 36.26 | 34.52 | 40.97 | 42.23 | 45.55 | 49.67 | 51.00 | 53.16 | 45.87 | 45.06 | 42.13 | 33.00 | 43.28 | |||||||||||||
1933 | 35.35 | 32.71 | 37.03 | 38.33 | 42.81 | 47.57 | 49.32 | 51.65 | 50.20 | ----- | z | ----- | z | 40.03 | 42.50 | b | ||||||||||
1934 | 41.23 | 44.21 | 44.19 | 43.27 | 46.61 | 47.30 | 51.48 | 53.87 | 49.41 | a | 45.42 | 44.53 | 39.26 | 45.90 | ||||||||||||
1935 | 36.13 | 37.32 | 34.81 | 37.73 | 42.77 | 47.97 | 50.19 | 48.29 | 48.17 | 42.13 | 35.33 | 37.48 | 41.53 | |||||||||||||
1936 | 38.65 | 32.86 | 36.61 | 43.03 | 46.45 | 51.80 | 52.87 | 54.10 | 43.20 | 42.29 | 36.10 | 39.16 | 43.09 | |||||||||||||
1937 | 27.71 | 36.04 | 39.65 | 40.80 | 43.94 | 48.97 | 50.83 | a | 50.87 | 50.27 | 45.87 | 44.03 | 39.55 | 43.21 | ||||||||||||
1938 | 37.94 | 36.39 | 38.32 | 42.10 | 42.94 | 48.63 | 49.97 | 50.68 | 51.13 | 45.10 | b | 39.07 | 37.45 | 43.31 | ||||||||||||
1939 | 38.71 | 35.57 | 37.68 | 40.37 | 42.63 | a | 49.20 | 50.35 | 50.97 | 46.93 | 45.03 | 42.47 | 41.45 | 43.45 | ||||||||||||
1940 | 38.87 | 41.07 | 40.87 | 42.57 | 44.42 | 48.07 | 51.55 | 52.74 | 52.53 | 48.84 | 37.10 | 39.35 | 44.83 | |||||||||||||
1941 | 39.03 | 41.11 | 40.52 | 43.03 | 46.06 | 51.18 | b | 54.97 | 53.52 | 50.43 | 46.97 | 40.85 | c | 39.35 | 45.59 | |||||||||||
1942 | 35.26 | 37.00 | 36.94 | 42.97 | 45.45 | 50.27 | 57.90 | 55.19 | 49.13 | 45.94 | 40.77 | 39.61 | 44.70 | |||||||||||||
1943 | 31.19 | 38.21 | 37.06 | 42.33 | 44.03 | 49.60 | 52.19 | 52.65 | 48.47 | 46.74 | 40.63 | 36.55 | 43.31 | |||||||||||||
1944 | 36.52 | 37.00 | 36.19 | 40.93 | 44.42 | 47.80 | 51.48 | 52.10 | 48.43 | 46.32 | 41.33 | 35.29 | 43.15 | |||||||||||||
1945 | 38.23 | 39.39 | 37.42 | 41.07 | 47.03 | 46.47 | 49.74 | 50.39 | 47.80 | 43.48 | 40.52 | a | 38.16 | 43.31 | ||||||||||||
1946 | 39.00 | 38.11 | 38.26 | 40.13 | 46.81 | 48.97 | 52.32 | 51.42 | 49.45 | a | 42.16 | 37.83 | 37.67 | a | 43.51 | |||||||||||
1947 | 33.94 | 39.07 | 40.19 | 42.63 | 45.81 | 50.57 | 52.58 | 52.52 | 48.97 | 47.45 | 42.23 | 40.48 | 44.70 | |||||||||||||
1948 | 35.06 | 35.59 | 36.97 | 39.40 | 45.84 | 51.77 | 51.48 | 53.77 | 48.40 | 45.87 | a | 31.43 | 25.32 | 41.74 | ||||||||||||
1949 | 25.60 | a | 34.64 | 38.77 | a | 42.10 | 45.45 | 46.17 | 49.45 | 51.90 | 50.13 | 40.35 | 45.00 | 37.42 | 42.25 | |||||||||||
1950 | 28.13 | 36.86 | 38.29 | 39.10 | a | 42.13 | 49.50 | 50.48 | 52.03 | 46.73 | 43.55 | 41.73 | 44.00 | 42.71 | ||||||||||||
1951 | 36.06 | 37.32 | 35.19 | 38.73 | 44.39 | 49.63 | 52.65 | 50.42 | 47.53 | 45.67 | a | 40.70 | 35.77 | 42.84 | ||||||||||||
1952 | 35.81 | 37.10 | 36.06 | 38.30 | 42.68 | 48.77 | 50.68 | 52.70 | a | 47.33 | 46.19 | 34.67 | 38.23 | 42.38 | ||||||||||||
1953 | 43.13 | 38.19 | a | 37.84 | 40.37 | 43.81 | 47.40 | 51.29 | 53.32 | 49.27 | 45.71 | 43.87 | 39.81 | 44.50 | ||||||||||||
1954 | 34.58 | 37.79 | 33.13 | 39.24 | a | 43.30 | a | 46.70 | 49.42 | 51.42 | 48.76 | a | 41.71 | 44.37 | 38.10 | 42.38 | ||||||||||
1955 | 36.35 | 35.75 | 35.13 | a | 36.31 | a | 43.26 | 49.00 | 52.45 | 49.45 | 47.38 | a | 44.93 | b | 38.62 | a | 36.52 | 42.10 | ||||||||
1956 | 37.37 | a | 34.07 | a | 36.81 | 40.33 | 45.58 | 48.97 | 52.61 | 52.93 | a | 48.97 | 45.27 | a | 37.37 | 38.03 | 43.19 | |||||||||
1957 | 30.94 | 36.64 | 40.00 | 42.20 | 47.10 | 50.50 | 51.10 | 52.23 | a | 50.30 | 44.60 | a | 38.47 | 39.94 | 43.67 | |||||||||||
1958 | 41.87 | 44.29 | 36.55 | 42.23 | 48.23 | 55.00 | 55.29 | 53.13 | 50.38 | a | 46.29 | 40.77 | 44.27 | a | 46.52 | |||||||||||
1959 | 40.42 | 38.04 | 40.26 | 43.77 | 44.94 | 51.90 | 51.68 | 51.87 | a | 50.03 | 46.94 | 37.83 | 35.35 | 44.42 | ||||||||||||
1960 | 36.26 | 37.17 | 38.42 | 42.13 | 44.45 | 49.67 | 48.60 | a | 52.74 | 47.20 | 47.03 | a | 40.27 | 37.80 | a | 43.48 | ||||||||||
1961 | 40.35 | 42.18 | 39.48 | 41.13 | 44.55 | 48.53 | 53.19 | 52.94 | 48.43 | 43.77 | a | 35.13 | 36.52 | b | 43.85 | |||||||||||
1962 | 34.29 | 37.50 | 36.16 | 41.10 | 45.16 | 46.87 | 50.74 | 52.45 | 49.57 | b | 44.77 | 41.41 | a | 37.42 | 43.12 | |||||||||||
1963 | 30.55 | 42.41 | a | 36.45 | 39.73 | 46.97 | 49.80 | 53.00 | b | 53.39 | 52.33 | 46.77 | 42.21 | b | 39.94 | 44.46 | ||||||||||
1964 | 39.35 | 35.66 | 38.42 | 39.63 | 42.84 | 49.40 | 52.87 | 51.94 | 48.14 | a | 46.03 | 37.20 | 35.87 | 43.11 | ||||||||||||
1965 | 36.23 | 39.32 | 37.35 | 41.77 | 44.23 | 47.63 | 51.74 | 54.26 | 49.41 | a | 48.06 | 45.17 | 36.35 | 44.29 | ||||||||||||
1966 | 37.64 | f | 37.57 | 36.97 | 42.93 | 42.71 | 48.50 | 52.94 | 50.61 | 51.23 | 44.77 | 42.73 | 42.71 | 44.88 | a | |||||||||||
1967 | 40.58 | 38.32 | 37.00 | 36.37 | 44.45 | 51.63 | 52.32 | 53.10 | 50.93 | 48.45 | 42.87 | 38.23 | 44.52 | |||||||||||||
1968 | 38.06 | 42.14 | 41.71 | 40.50 | 45.52 | 49.87 | 53.58 | 52.77 | 50.70 | 45.32 | 43.13 | 36.68 | 45.00 | |||||||||||||
1969 | 32.65 | 35.48 | a | 37.43 | a | 41.73 | 46.32 | 54.00 | 51.94 | 51.26 | 50.83 | 44.61 | 40.20 | 40.13 | 43.88 | |||||||||||
1970 | 38.65 | 40.32 | 38.26 | 39.73 | 43.90 | 48.80 | 51.74 | 51.13 | 47.47 | 43.73 | a | 42.60 | 36.97 | 43.61 | ||||||||||||
1971 | 37.52 | 37.50 | 36.03 | 39.60 | 44.58 | 48.20 | 50.39 | 53.87 | 47.67 | 42.55 | 41.52 | a | 36.35 | 42.98 | ||||||||||||
1972 | 34.68 | 35.76 | 39.90 | a | 38.13 | 45.55 | 48.90 | 51.61 | 51.06 | 46.17 | 41.81 | 41.83 | 34.35 | 42.48 | ||||||||||||
1973 | 36.39 | 38.11 | 38.90 | 41.47 | 45.00 | 49.70 | 50.16 | 49.81 | 48.87 | 44.13 | 38.63 | 40.26 | 43.45 | |||||||||||||
1974 | 34.77 | 37.89 | 39.42 | 41.83 | 44.35 | 46.77 | 48.39 | 51.23 | 48.27 | 40.97 | 40.59 | a | 39.55 | 42.84 | ||||||||||||
1975 | 37.37 | d | 35.96 | 36.35 | 36.70 | c | 43.77 | 48.33 | 52.29 | 52.48 | b | 49.21 | a | 46.89 | c | 39.85 | c | 39.45 | 43.22 | |||||||
1976 | 37.93 | a | 36.29 | a | 36.10 | b | 40.00 | b | 43.68 | f | 47.09 | g | 50.21 | g | 52.11 | d | 52.14 | b | 44.77 | 39.79 | b | 38.43 | c | 41.95 | c | |
1977 | 34.00 | b | 40.50 | 37.97 | 41.38 | a | 44.07 | b | 49.21 | a | 50.14 | c | 53.45 | b | 49.20 | 43.27 | a | 39.75 | b | 40.10 | a | 43.59 | ||||
1978 | 40.42 | 41.48 | c | 38.93 | d | 40.79 | f | 44.03 | b | 50.42 | d | 51.96 | g | 53.08 | f | 50.57 | i | 43.89 | d | 34.15 | c | 32.62 | b | 40.74 | d | |
1979 | 32.38 | b | 37.81 | b | 38.85 | d | 41.83 | 45.42 | 47.00 | 52.55 | b | 52.80 | a | 51.38 | a | 48.04 | c | 36.88 | d | 42.45 | b | 43.95 | ||||
1980 | 32.33 | a | 40.50 | a | 40.44 | f | 40.80 | 44.94 | 48.39 | b | 52.23 | ----- | z | 48.32 | e | 43.84 | 42.72 | a | 40.13 | 43.42 | b | |||||
1981 | 40.07 | b | 37.65 | e | 38.93 | a | 40.89 | b | 44.96 | c | 49.59 | a | 50.62 | e | 51.93 | b | 46.62 | i | 40.45 | b | 38.57 | b | 35.33 | a | 42.64 | a |
1982 | 32.96 | d | 36.25 | d | 37.10 | b | 36.76 | a | 42.39 | 49.40 | 51.24 | f | 50.97 | b | ----- | z | 46.13 | 37.41 | c | 36.61 | 40.60 | b | ||||
1983 | 39.71 | 41.11 | a | 39.60 | a | 37.83 | 45.57 | a | 48.14 | b | 53.35 | 52.23 | a | 45.14 | b | 40.30 | a | 43.17 | a | 31.50 | a | 43.14 | ||||
1984 | 37.57 | c | 39.03 | 41.66 | b | 40.17 | 43.61 | c | 48.03 | a | 48.58 | 48.87 | a | 47.33 | 44.52 | 40.10 | 34.39 | 42.82 | ||||||||
1985 | 30.94 | 31.93 | a | 33.34 | b | 40.37 | 43.03 | a | 46.89 | b | 50.27 | a | 48.83 | b | 46.88 | d | 43.79 | b | 33.39 | b | 31.30 | a | 40.08 | |||
1986 | 39.87 | a | 37.42 | b | 42.21 | b | 39.56 | c | 44.84 | 48.76 | a | 52.33 | d | 49.69 | b | 46.50 | 45.97 | a | 41.67 | c | 38.30 | a | 43.93 | |||
1987 | 37.13 | a | 39.50 | 38.29 | g | 41.60 | 46.70 | a | 46.67 | 51.71 | 51.26 | 47.90 | a | 42.74 | 43.70 | 35.39 | 44.03 | a | ||||||||
1988 | 37.26 | 39.14 | 39.27 | a | 42.60 | 45.45 | 47.50 | 50.97 | 50.94 | 47.00 | a | 49.07 | a | 44.23 | 38.90 | 44.36 | ||||||||||
1989 | 38.73 | a | 31.14 | 39.70 | a | 43.27 | 45.26 | 51.67 | 52.48 | 53.84 | 48.47 | 44.90 | 42.79 | a | 37.87 | a | 44.18 | |||||||||
1990 | 39.94 | 37.00 | 40.13 | 44.60 | 46.35 | 50.93 | 53.39 | 54.94 | 51.73 | 44.94 | 43.73 | 31.13 | 44.90 | |||||||||||||
1991 | 35.94 | 41.68 | 36.80 | a | 41.60 | 47.06 | 49.34 | a | 52.03 | a | 54.35 | 49.93 | 43.19 | 43.90 | 40.74 | 44.72 | ||||||||||
1992 | 41.39 | 41.83 | 41.61 | 45.07 | 45.71 | 51.83 | 53.13 | 53.06 | 49.38 | a | 46.13 | 42.97 | 36.39 | 45.71 | ||||||||||||
1993 | 34.16 | 34.54 | 41.52 | 44.37 | 48.45 | 50.90 | a | 54.35 | 53.39 | 48.07 | 46.97 | 35.57 | 38.13 | 44.20 | ||||||||||||
1994 | 40.45 | 37.29 | 40.71 | 44.67 | 45.97 | 49.53 | 52.68 | 54.16 | 51.53 | 44.00 | 37.93 | 38.67 | a | 44.80 | ||||||||||||
1995 | 43.06 | 40.54 | 36.77 | a | 41.17 | 47.26 | 50.03 | 54.68 | 50.73 | a | 54.45 | a | 46.03 | 44.73 | 41.16 | 45.88 | ||||||||||
1996 | 38.94 | 37.21 | 40.65 | 45.13 | 45.42 | 48.87 | 51.65 | 51.03 | 47.97 | 44.47 | a | 41.86 | a | 37.60 | a | 44.23 | ||||||||||
1997 | 39.65 | 38.43 | 40.33 | a | 41.97 | a | 48.47 | a | 51.53 | 53.90 | a | 55.68 | 53.72 | a | 47.61 | ----- | z | 38.63 | a | 46.36 | a | |||||
1998 | 41.33 | a | 41.04 | 41.19 | 39.81 | c | 46.74 | 52.33 | c | 54.93 | a | 53.10 | a | 49.17 | a | 45.58 | 43.70 | 36.63 | a | 45.46 | ||||||
1999 | 39.03 | a | 39.64 | 37.70 | a | 37.73 | 43.13 | 49.13 | 51.21 | b | 53.69 | b | 46.18 | b | 43.71 | 44.79 | b | 40.10 | b | 43.84 | ||||||
2000 | 37.03 | a | 39.17 | 37.97 | a | 41.74 | c | 45.97 | a | 49.64 | b | 52.15 | e | 52.62 | b | 50.10 | a | 46.10 | a | 37.40 | 38.61 | 44.04 | ||||
2001 | 38.29 | 35.33 | a | 39.90 | a | 40.17 | a | 43.53 | a | 47.53 | 51.89 | c | 53.69 | b | 49.18 | b | 45.20 | a | 42.06 | l | ----- | z | 44.47 | b | ||
2002 | 35.31 | o | 37.95 | h | 36.83 | b | 40.31 | a | 42.97 | a | 50.38 | a | 52.32 | 51.07 | c | 47.52 | a | 43.59 | b | 41.83 | a | 40.26 | 44.71 | b | ||
2003 | 42.14 | b | 36.52 | c | 41.71 | g | 41.24 | a | 43.57 | a | 49.04 | f | 51.96 | c | 51.73 | e | 49.03 | a | 48.97 | 38.66 | a | 39.26 | 44.31 | b | ||
2004 | 39.55 | 39.29 | a | 40.19 | 40.14 | b | 47.97 | a | 50.90 | 54.40 | a | 56.21 | b | 50.32 | b | 45.79 | g | 39.08 | e | 40.78 | m | 45.80 | b | |||
2005 | ----- | z | 35.52 | e | 39.59 | b | 43.30 | 49.20 | a | 50.20 | 52.33 | g | 51.47 | n | 44.11 | k | 47.28 | f | 38.38 | i | 38.44 | d | 42.71 | f | ||
2006 | 41.39 | 35.32 | 36.68 | 39.93 | c | ----- | z | 50.89 | c | 51.86 | b | 51.10 | k | 46.35 | g | 41.55 | 42.11 | k | 38.09 | h | 42.52 | e | ||||
2007 | 33.64 | c | 37.96 | a | 41.61 | h | 39.08 | e | 43.37 | a | 47.62 | f | 60.18 | n | 52.50 | e | 47.71 | f | 42.88 | g | 39.17 | g | 37.39 | m | 41.31 | g |
2008 | 37.58 | l | 39.45 | g | 37.20 | f | 37.10 | a | 46.88 | e | 48.43 | i | 52.13 | p | 53.84 | f | 49.61 | g | 44.79 | c | 44.63 | c | 35.66 | b | 41.81 | g |
2009 | 38.12 | f | 34.71 | g | 37.74 | d | 40.44 | e | 45.10 | a | 51.31 | d | 50.28 | m | 54.38 | b | 51.35 | d | 46.43 | h | 45.00 | d | 32.21 | g | 46.47 | e |
2010 | 44.09 | i | 41.00 | c | 39.76 | f | 41.89 | b | 43.65 | e | 48.22 | g | 50.83 | h | 51.33 | m | ----- | z | 43.71 | g | 40.76 | a | 40.69 | b | 41.60 | g |
2011 | 38.94 | 34.85 | b | 38.56 | f | 37.92 | e | 43.65 | h | 50.18 | m | 49.84 | l | 54.42 | l | 48.06 | l | 46.00 | l | 35.94 | m | 34.04 | f | 37.23 | i | |
2012 | 37.83 | g | 37.12 | e | 37.48 | 42.36 | e | 44.41 | d | 49.48 | c | ----- | z | ----- | z | 47.05 | j | 44.08 | e | 43.80 | 39.62 | e | 42.29 | d | ||
2013 | 35.61 | 40.04 | e | 39.74 | d | 43.19 | c | 47.07 | a | 50.86 | b | ----- | z | 54.44 | d | 53.59 | c | 41.79 | b | 41.46 | b | ----- | z | 44.78 | b | |
2014 | 39.19 | 37.65 | b | 42.17 | a | 43.30 | 49.27 | a | 52.11 | c | 53.85 | e | 54.90 | a | 52.47 | 50.62 | b | 42.10 | a | 41.50 | a | 46.59 | ||||
2015 | 40.63 | a | 43.96 | 42.10 | 40.17 | a | 47.62 | b | 50.36 | b | 54.75 | c | 53.80 | k | 49.35 | d | 49.62 | b | 39.41 | c | 40.30 | d | 45.30 | a | ||
2016 | 41.43 | a | 40.94 | l | 42.44 | d | 45.74 | g | 47.50 | a | 49.97 | a | 54.64 | f | 54.39 | 50.04 | b | 47.83 | g | 46.68 | e | 34.21 | b | 45.83 | d | |
2017 | 33.30 | d | 36.88 | c | 41.56 | f | 42.86 | b | 46.07 | d | 50.68 | b | 50.57 | h | 51.89 | d | 49.00 | d | 43.50 | e | 43.46 | b | 37.48 | b | 43.51 | b |
2018 | 43.16 | 37.40 | c | 37.54 | c | 43.42 | d | 48.54 | g | 51.92 | f | 53.25 | g | 54.21 | q | 48.04 | f | 44.55 | i | 39.16 | e | 39.73 | e | 40.07 | f | |
2019 | 38.96 | c | 32.68 | c | 35.37 | d | 43.17 | g | 45.60 | f | 51.14 | p | 54.69 | e | 55.81 | e | 52.88 | f | 42.09 | h | 39.81 | d | 40.75 | g | 42.89 | f |
2020 | 42.50 | g | 36.67 | e | 36.43 | c | 40.12 | e | 47.71 | c | 50.95 | i | 51.74 | h | 53.07 | a | 53.55 | j | 47.46 | e | 41.39 | l | 39.16 | l | 43.58 | f |
2021 | 39.70 | h | 39.50 | f | 36.28 | f | 39.80 | e | 46.46 | e | 50.69 | q | 52.04 | h | 52.42 | g | 48.12 | f | 45.32 | f | 44.92 | d | 37.32 | i | 43.73 | i |
2022 | 38.04 | e | 35.20 | h | 40.95 | j | 38.60 | j | 42.53 | n | 50.05 | i | 53.35 | h | 55.44 | d | 51.77 | h | 47.75 | c | 36.13 | 38.15 | e | 43.10 | g | |
2023 | 39.88 | f | 35.50 | h | 34.74 | h | 41.00 | i | 47.76 | b | 48.96 | c | 49.10 | j | 53.25 | g | 48.43 | g | 46.74 | d | 37.79 | p | 43.37 | l | 47.82 | i |
2024 | 41.57 | j | 38.86 | h | 36.33 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.21 | 37.86 | 38.46 | 40.98 | 45.24 | 49.45 | 52.01 | 52.53 | 49.29 | 45.15 | 40.75 | 37.95 | 43.83 | |||||||||||||
S.D. | 3.69 | 2.68 | 2.16 | 2.03 | 1.70 | 1.69 | 1.71 | 1.71 | 2.26 | 2.50 | 3.15 | 2.95 | 1.27 | |||||||||||||
SKEW | -0.69 | 0.12 | 0.08 | -0.25 | 0.26 | 0.47 | 0.42 | -0.06 | 0.83 | 0.69 | -0.59 | -1.15 | 0.17 | |||||||||||||
MAX | 45.26 | 44.29 | 44.19 | 45.13 | 49.27 | 55.00 | 57.90 | 56.45 | 58.48 | 55.42 | 46.68 | 44.27 | 47.20 | |||||||||||||
MIN | 25.60 | 31.14 | 33.13 | 36.31 | 42.13 | 46.17 | 48.39 | 48.29 | 43.20 | 40.30 | 31.43 | 25.32 | 40.08 | |||||||||||||
YRS | 83 | 87 | 83 | 89 | 88 | 83 | 76 | 82 | 78 | 83 | 85 | 83 | 62 |