YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.33 | a | 33.33 | k |
1936 | 38.29 | 29.52 | b | 34.87 | 41.43 | 47.48 | 51.13 | 50.32 | 45.71 | 41.53 | 37.42 | 25.59 | a | 34.94 | 39.85 | |||||||||||
1937 | 21.13 | 30.54 | 35.90 | 36.00 | 41.03 | 48.10 | 48.06 | 46.39 | 45.03 | 42.29 | 39.50 | 33.74 | 38.98 | |||||||||||||
1938 | 31.71 | 32.14 | 33.84 | 36.87 | 40.13 | 44.00 | 48.00 | 44.03 | a | 47.87 | 41.68 | 33.63 | 31.71 | 38.80 | ||||||||||||
1939 | 33.58 | 30.82 | 33.06 | 35.57 | 40.74 | 44.87 | 48.06 | 46.74 | 44.33 | 40.58 | 35.40 | 36.29 | 39.17 | |||||||||||||
1940 | 32.00 | 37.52 | 36.23 | 38.07 | 42.26 | 44.07 | 47.55 | 46.94 | 48.47 | 43.77 | 33.63 | 35.03 | 40.46 | |||||||||||||
1941 | 33.35 | 33.07 | 35.19 | 36.60 | 41.87 | a | 47.03 | 50.06 | 49.94 | 45.57 | 38.87 | 37.50 | 34.87 | 40.33 | ||||||||||||
1942 | 29.61 | 32.50 | 31.10 | 36.33 | 42.19 | 45.10 | 50.42 | 48.74 | 43.10 | 38.77 | 35.73 | 36.84 | 39.20 | |||||||||||||
1943 | 24.65 | 30.89 | 32.94 | 37.77 | 39.61 | 46.17 | 47.58 | 47.26 | 44.27 | 41.35 | 33.60 | 29.68 | 37.98 | |||||||||||||
1944 | 29.23 | 31.10 | 31.06 | 36.20 | 39.42 | 44.97 | 47.55 | 46.77 | 45.10 | 41.71 | 34.10 | 30.19 | 38.12 | |||||||||||||
1945 | 33.77 | 34.75 | 32.13 | 36.76 | a | 44.19 | 44.10 | 47.26 | 46.58 | 43.00 | 37.35 | 36.97 | a | 33.74 | 39.22 | |||||||||||
1946 | 31.61 | 33.50 | 33.61 | 36.43 | 41.74 | 45.83 | 49.65 | 47.26 | 44.43 | 37.77 | 32.55 | a | 35.10 | 39.12 | ||||||||||||
1947 | 27.77 | 33.54 | 35.42 | 39.27 | 42.74 | 47.97 | a | 49.39 | 46.74 | 44.97 | 44.39 | 36.60 | 33.32 | 40.18 | ||||||||||||
1948 | ----- | z | 30.76 | 32.74 | 35.70 | 43.19 | ----- | z | 42.48 | b | 44.94 | 41.10 | a | 34.65 | 33.43 | 28.77 | 36.78 | b | ||||||||
1949 | 20.79 | c | 31.43 | 37.90 | b | 38.30 | 42.39 | 47.63 | 49.87 | a | 48.19 | d | 44.39 | b | 33.39 | 33.10 | 31.90 | 38.27 | ||||||||
1950 | 22.29 | 33.22 | a | 34.30 | a | 34.50 | 38.93 | c | 43.40 | 44.90 | a | 46.23 | 42.30 | 41.35 | 37.83 | 39.58 | 38.24 | |||||||||
1951 | 31.14 | c | 34.07 | a | 31.61 | 36.30 | 41.26 | 45.07 | b | 46.76 | b | 45.03 | 45.80 | 42.84 | 37.53 | 31.90 | a | 39.11 | ||||||||
1952 | 29.77 | a | 31.45 | 33.87 | 37.10 | a | 39.42 | 43.70 | c | 48.19 | d | 47.96 | h | 48.40 | 44.23 | 28.45 | j | 32.68 | 38.88 | b | ||||||
1953 | 38.45 | 32.36 | 32.93 | b | 35.50 | 41.45 | 44.13 | 46.84 | 49.26 | 47.40 | 41.43 | c | 38.93 | 34.52 | 40.27 | |||||||||||
1954 | 32.58 | 33.39 | 31.81 | 37.13 | 41.63 | a | 45.83 | 46.90 | 49.10 | 45.86 | a | 39.06 | 41.30 | 34.03 | 39.89 | |||||||||||
1955 | 32.16 | 31.22 | a | 32.76 | b | 34.83 | 38.60 | a | 45.83 | 48.07 | b | 45.94 | 46.10 | a | 42.13 | 35.97 | 33.52 | 38.93 | ||||||||
1956 | 34.39 | 29.34 | 35.55 | b | 37.23 | 43.80 | a | 44.14 | b | 48.71 | 47.83 | a | 44.93 | 41.35 | 33.20 | 32.87 | 39.45 | |||||||||
1957 | 26.13 | 34.11 | a | 38.61 | 38.50 | 44.76 | b | 47.80 | 47.29 | 47.58 | 48.93 | 41.52 | 31.93 | 36.58 | 40.31 | |||||||||||
1958 | 35.55 | 41.00 | 33.61 | 39.40 | 44.61 | 51.47 | 51.06 | 49.84 | 46.67 | 39.97 | 39.20 | 38.65 | 42.59 | |||||||||||||
1959 | 35.35 | 33.96 | 35.16 | 37.97 | 40.32 | 48.30 | 48.61 | 45.94 | 46.50 | 42.42 | 34.10 | 32.71 | 40.11 | |||||||||||||
1960 | 28.84 | 34.10 | 35.35 | 38.80 | 42.19 | 45.90 | 46.45 | 47.23 | 46.03 | 41.65 | 36.53 | 31.77 | 39.57 | |||||||||||||
1961 | 36.30 | a | 38.71 | 37.58 | 38.27 | 43.29 | 46.63 | 48.16 | 49.58 | 42.77 | 39.97 | 32.87 | 33.52 | 40.64 | ||||||||||||
1962 | 28.03 | 32.37 | a | 32.43 | a | 38.00 | 40.19 | 43.10 | 45.97 | 47.48 | 40.93 | 37.16 | 34.57 | 35.74 | 38.00 | |||||||||||
1963 | 25.55 | 38.57 | 35.06 | 38.03 | 40.48 | 44.70 | 49.00 | 49.58 | 48.70 | 43.35 | ----- | z | 31.17 | a | 40.38 | a | ||||||||||
1964 | ----- | z | ----- | z | 33.13 | 35.50 | ----- | z | ----- | z | ----- | z | ----- | z | 44.33 | ----- | z | 33.43 | 33.10 | 35.90 | g | |||||
1965 | 34.06 | 35.29 | 35.74 | 39.77 | 38.81 | 42.90 | 47.71 | 51.77 | 45.30 | 43.90 | 40.23 | 31.23 | 40.56 | |||||||||||||
1966 | 34.47 | a | 32.93 | 35.10 | 36.73 | 39.94 | 45.79 | a | 48.03 | 47.81 | 47.27 | 41.26 | 40.03 | 37.52 | 40.57 | |||||||||||
1967 | 37.20 | a | 33.71 | 34.42 | 33.00 | 40.13 | 48.07 | 46.81 | 49.74 | 47.13 | 41.45 | b | 35.37 | ----- | z | 40.64 | a | |||||||||
1968 | 33.10 | 37.93 | 37.50 | a | 34.90 | 40.26 | 46.50 | 47.74 | 48.13 | 45.37 | 39.86 | b | 37.61 | b | 32.07 | a | 40.08 | |||||||||
1969 | 28.58 | 31.71 | 33.58 | 36.87 | 44.17 | b | 51.43 | 47.90 | 44.81 | 46.67 | 40.35 | 35.34 | a | 35.40 | a | 39.74 | ||||||||||
1970 | 36.06 | 35.30 | a | 35.13 | 35.27 | 40.10 | 46.13 | 47.42 | 45.39 | 43.77 | 38.77 | 37.38 | a | 33.27 | a | 39.50 | ||||||||||
1971 | 33.55 | 32.50 | 33.58 | 36.23 | 42.55 | 44.07 | 48.81 | 50.42 | 44.53 | 38.61 | 37.37 | 33.32 | 39.63 | |||||||||||||
1972 | 32.06 | 35.29 | a | 38.94 | 35.23 | 42.32 | 46.90 | 49.97 | 49.00 | 42.76 | a | 38.71 | 38.80 | 27.65 | 39.80 | |||||||||||
1973 | 30.07 | a | 35.41 | a | 35.10 | 36.90 | 41.74 | 47.73 | 48.10 | 44.87 | 47.00 | 41.74 | 36.77 | 37.84 | 40.27 | |||||||||||
1974 | 30.13 | 33.96 | 36.53 | a | 38.83 | 41.52 | 46.86 | a | 51.10 | 49.20 | a | 46.77 | 38.55 | 36.93 | 36.90 | 40.61 | ||||||||||
1975 | 35.55 | 34.71 | 35.06 | 34.93 | 41.65 | 45.37 | 47.77 | 47.55 | 45.00 | 45.32 | 35.76 | a | 36.87 | 40.46 | ||||||||||||
1976 | 34.39 | 33.03 | 34.42 | 36.83 | 40.74 | 44.14 | a | 46.93 | a | 48.23 | 48.50 | 38.94 | 37.00 | 31.58 | 39.56 | |||||||||||
1977 | 28.77 | 33.81 | a | 34.45 | 36.60 | 40.45 | 45.17 | 49.00 | b | 51.58 | 47.20 | 39.77 | 34.77 | 35.48 | b | 39.76 | ||||||||||
1978 | 34.13 | a | 36.21 | 37.58 | 39.63 | 41.77 | 47.48 | a | 47.61 | 48.03 | 47.20 | 39.16 | 30.27 | 26.48 | b | 39.63 | ||||||||||
1979 | 26.84 | 36.36 | 37.90 | 41.83 | 44.50 | a | 48.43 | 57.58 | l | 50.23 | 48.31 | a | 43.90 | b | 35.07 | 35.70 | a | 40.82 | a | |||||||
1980 | 27.30 | a | 34.75 | a | 36.19 | 39.00 | 42.29 | 45.27 | 49.26 | 44.20 | a | 45.25 | b | 37.92 | e | 39.13 | 35.63 | a | 39.68 | |||||||
1981 | 32.10 | 33.61 | 34.50 | i | 41.06 | m | 44.87 | p | 46.87 | 49.93 | b | 49.28 | f | 46.61 | b | 40.22 | m | 37.17 | f | 36.48 | 40.93 | f | ||||
1982 | 31.04 | e | 33.68 | 33.90 | a | 35.59 | a | 42.33 | a | 48.63 | 49.13 | 48.13 | 47.57 | 44.03 | 35.93 | 35.83 | a | 40.48 | ||||||||
1983 | 38.35 | 40.71 | 41.81 | 38.93 | 43.67 | a | 48.17 | 50.13 | 51.87 | 44.67 | 41.48 | 43.03 | 30.93 | b | 42.81 | |||||||||||
1984 | 35.55 | b | 37.62 | 40.81 | 38.83 | a | 43.06 | 46.63 | 48.53 | a | 49.00 | 46.83 | 42.00 | 39.79 | a | 33.13 | a | 41.82 | ||||||||
1985 | 30.06 | 30.93 | 32.35 | 40.23 | ----- | z | 46.30 | 49.84 | 46.90 | 46.07 | 40.57 | a | 31.45 | a | 26.35 | 38.28 | a | |||||||||
1986 | 37.42 | 37.11 | 40.87 | 37.80 | 44.48 | 50.80 | 49.32 | 51.48 | 46.57 | 43.29 | 38.72 | a | 34.26 | 42.68 | ||||||||||||
1987 | 32.87 | 36.43 | 38.48 | 40.67 | 45.97 | 48.57 | 51.61 | 50.03 | 47.97 | 42.87 | 39.93 | a | 33.61 | 42.42 | ||||||||||||
1988 | 33.39 | 35.66 | 35.73 | a | 40.93 | 42.16 | 46.97 | 50.16 | 48.61 | 45.47 | 45.77 | 39.70 | 33.39 | 41.49 | ||||||||||||
1989 | 35.03 | a | 29.81 | a | 37.16 | 41.23 | 42.84 | 48.70 | 51.26 | 51.29 | 48.59 | a | 41.58 | 38.07 | 31.93 | b | 41.46 | |||||||||
1990 | 35.14 | b | 32.48 | a | 36.23 | 40.03 | 43.74 | 49.83 | 52.29 | 52.45 | 50.27 | 40.61 | 39.97 | a | 28.34 | b | 41.78 | |||||||||
1991 | 31.87 | 39.50 | 35.61 | 39.90 | a | 43.00 | 47.07 | 51.39 | 52.13 | 49.37 | 41.23 | 41.07 | 35.52 | 42.30 | ||||||||||||
1992 | 37.42 | 40.14 | 39.58 | 43.97 | 44.26 | 49.03 | 52.13 | 51.52 | 47.87 | 44.38 | b | 39.10 | 33.24 | b | 43.55 | |||||||||||
1993 | 30.52 | 31.54 | 40.68 | 42.30 | 47.00 | a | 48.90 | 51.60 | a | 52.87 | 45.97 | 43.68 | 31.10 | 34.06 | 41.68 | |||||||||||
1994 | 37.68 | 35.07 | 39.06 | 42.30 | c | 45.89 | d | 45.68 | h | 51.52 | b | 50.35 | 49.43 | 40.79 | b | 34.69 | a | 36.77 | e | 42.14 | a | |||||
1995 | 39.33 | d | 36.27 | f | 38.03 | 39.47 | 44.97 | 51.23 | 54.77 | 49.07 | a | 52.47 | 43.79 | b | 45.07 | 36.77 | 45.00 | a | ||||||||
1996 | 36.26 | 34.12 | c | 39.23 | 43.63 | 42.94 | 46.59 | a | 52.32 | 50.37 | a | 45.80 | 42.35 | 36.77 | 35.23 | 42.13 | ||||||||||
1997 | 35.07 | a | 35.04 | 37.48 | b | 39.70 | 47.32 | 48.23 | 50.84 | 54.48 | 51.40 | 42.81 | 40.80 | 33.19 | 43.03 | |||||||||||
1998 | 37.42 | 37.64 | 37.35 | 38.40 | 45.53 | a | 48.50 | 53.74 | 51.16 | 47.70 | 42.20 | a | 41.47 | 33.16 | 42.86 | |||||||||||
1999 | 34.71 | 36.04 | 36.19 | 37.93 | 42.03 | 47.57 | 48.65 | 53.48 | 45.20 | 41.00 | 41.27 | 36.35 | 41.70 | |||||||||||||
2000 | 34.00 | 36.97 | 34.13 | 40.93 | 45.77 | 48.53 | 50.55 | b | 49.26 | 50.14 | a | 43.90 | 33.83 | a | 33.90 | 41.83 | ||||||||||
2001 | 33.94 | 33.54 | 37.90 | b | 37.67 | 43.19 | 46.50 | 50.39 | 51.55 | 48.40 | 41.61 | 40.48 | c | 36.28 | b | 41.79 | ||||||||||
2002 | 35.68 | 35.00 | 34.87 | 38.93 | 42.52 | 47.80 | 51.03 | 49.55 | 47.10 | 41.87 | 39.10 | 37.35 | 41.73 | |||||||||||||
2003 | 39.30 | a | 34.46 | 41.32 | 40.93 | 43.94 | 49.67 | 51.00 | 51.39 | 49.70 | 48.35 | 36.87 | 37.10 | a | 43.67 | |||||||||||
2004 | 33.73 | a | 36.62 | 38.74 | 40.87 | 47.13 | 51.77 | 53.32 | 54.74 | 49.87 | 45.90 | b | 36.86 | b | 37.75 | c | 43.94 | |||||||||
2005 | 37.00 | 33.75 | 37.90 | 41.43 | 48.94 | 49.50 | 53.42 | 51.58 | 45.57 | 46.81 | 34.47 | 33.71 | 42.84 | |||||||||||||
2006 | 38.71 | 33.89 | 37.23 | 39.59 | a | 45.26 | 52.40 | 53.90 | 50.23 | 48.43 | 40.68 | 40.03 | a | 34.23 | a | 42.88 | ||||||||||
2007 | 31.50 | a | 37.54 | 39.65 | 38.83 | 43.29 | 47.93 | 54.26 | 52.65 | 48.03 | 42.87 | 36.30 | 35.23 | 42.34 | ||||||||||||
2008 | 31.30 | a | 34.79 | 35.29 | 36.73 | 47.26 | 46.27 | 51.00 | 53.65 | 48.33 | 42.45 | 41.27 | 30.70 | a | 41.59 | |||||||||||
2009 | 32.79 | b | 32.68 | 35.74 | 38.43 | 43.52 | 51.20 | 53.42 | 51.77 | 49.87 | 43.87 | 37.90 | 30.10 | 41.77 | ||||||||||||
2010 | 39.65 | 38.89 | 38.10 | 39.33 | 43.32 | 48.03 | 49.97 | 50.58 | 51.67 | 42.55 | 38.17 | 37.71 | 43.16 | |||||||||||||
2011 | 34.26 | 32.21 | 38.84 | 36.83 | 42.32 | 48.80 | 51.03 | 52.97 | 51.50 | 45.71 | 36.37 | 30.90 | 41.81 | |||||||||||||
2012 | 34.35 | 36.45 | 35.74 | 42.47 | 44.45 | 48.67 | 51.32 | 50.68 | 47.27 | 45.55 | 41.20 | 36.68 | 42.90 | |||||||||||||
2013 | 31.48 | 36.29 | ----- | z | 40.30 | 48.77 | 50.67 | 50.13 | 54.52 | 52.27 | 40.77 | 37.30 | 28.87 | 42.85 | a | |||||||||||
2014 | 33.29 | 35.93 | 39.03 | 40.17 | 46.61 | 48.27 | 54.55 | 54.71 | 52.40 | 48.61 | 38.87 | 38.29 | 44.23 | |||||||||||||
2015 | 35.68 | 39.75 | 38.61 | 37.80 | 45.61 | 50.70 | 53.94 | 53.13 | 47.33 | 47.13 | 36.63 | 38.23 | 43.71 | |||||||||||||
2016 | 36.71 | 39.55 | 39.77 | 42.67 | 46.77 | 49.37 | 52.32 | 51.35 | 47.70 | 47.71 | 43.23 | 30.35 | 43.96 | |||||||||||||
2017 | 28.39 | 34.82 | 39.94 | 40.83 | 45.06 | 50.80 | 50.13 | 53.32 | 51.20 | 43.06 | 40.00 | 33.06 | 42.55 | |||||||||||||
2018 | 38.87 | 34.46 | 35.42 | 41.40 | 46.06 | 47.60 | 52.61 | 52.03 | 46.77 | 44.39 | 39.30 | 35.97 | 42.91 | |||||||||||||
2019 | 35.06 | 31.68 | 34.42 | 43.50 | 45.10 | 48.83 | 52.71 | 54.71 | 51.07 | 39.52 | 36.37 | 35.90 | 42.41 | |||||||||||||
2020 | 39.58 | 33.83 | 34.03 | 39.53 | 46.84 | 49.47 | 52.42 | 51.39 | 52.80 | 43.42 | 36.23 | 34.84 | 42.86 | |||||||||||||
2021 | 37.52 | 34.82 | 33.29 | 38.13 | 43.19 | 51.37 | 52.94 | 53.39 | 50.73 | 44.19 | 42.93 | 35.26 | 43.15 | |||||||||||||
2022 | 33.81 | 33.46 | 39.39 | 38.07 | 43.19 | 52.20 | 53.94 | 54.10 | 51.80 | 46.03 | 34.43 | 33.68 | 42.84 | |||||||||||||
2023 | 36.06 | 30.50 | 32.65 | 39.60 | 48.19 | 47.80 | 52.19 | 55.84 | 50.73 | 46.48 | 38.30 | 39.32 | 43.14 | |||||||||||||
2024 | 36.81 | 36.93 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.87 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.11 | 34.47 | 35.97 | 38.48 | 43.18 | 47.48 | 49.87 | 49.67 | 47.08 | 41.96 | 37.07 | 34.01 | 41.08 | |||||||||||||
S.D. | 4.13 | 2.69 | 2.61 | 2.33 | 2.46 | 2.35 | 2.42 | 2.87 | 2.72 | 2.86 | 3.27 | 2.83 | 1.68 | |||||||||||||
SKEW | -0.81 | 0.39 | 0.23 | 0.23 | 0.32 | 0.11 | -0.06 | 0.04 | 0.08 | -0.13 | -0.37 | -0.49 | -0.00 | |||||||||||||
MAX | 39.65 | 41.00 | 41.81 | 43.97 | 48.94 | 52.40 | 54.77 | 55.84 | 52.80 | 48.61 | 45.07 | 39.58 | 44.23 | |||||||||||||
MIN | 20.79 | 29.34 | 31.06 | 33.00 | 38.60 | 42.90 | 42.48 | 44.03 | 40.93 | 33.39 | 25.59 | 26.35 | 37.98 | |||||||||||||
YRS | 87 | 87 | 86 | 87 | 85 | 85 | 86 | 85 | 88 | 86 | 85 | 88 | 77 |