YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 38.35 | 41.93 | 43.68 | 52.21 | a | 53.55 | 66.93 | 75.68 | 72.52 | 63.50 | 51.84 | 44.73 | 34.58 | 53.29 | ||||||||||||
1931 | 35.55 | 44.75 | 44.39 | 53.37 | 60.26 | 69.63 | 80.61 | 75.87 | 68.30 | 54.77 | 44.30 | 34.77 | 55.55 | |||||||||||||
1932 | 31.61 | 43.14 | 42.61 | 46.77 | 55.77 | 65.77 | 76.45 | 75.48 | 70.23 | 54.94 | 44.30 | 35.52 | 53.55 | |||||||||||||
1933 | 33.32 | 32.50 | 41.16 | 45.90 | 52.48 | 67.73 | 79.77 | 76.23 | 71.23 | 60.58 | 43.93 | 37.55 | 53.53 | |||||||||||||
1934 | 35.65 | 43.46 | 50.13 | 56.23 | 64.16 | 64.60 | 79.68 | 77.35 | 67.30 | 56.19 | 45.97 | 41.00 | 56.81 | |||||||||||||
1935 | 39.58 | 42.07 | 39.68 | 47.93 | 52.90 | 66.93 | 73.10 | 74.97 | 67.40 | 52.61 | 39.83 | 37.39 | 52.87 | |||||||||||||
1936 | 34.33 | a | 39.45 | 44.45 | 50.70 | 60.58 | 70.90 | 76.39 | 75.90 | 66.03 | 55.97 | 44.37 | 38.00 | 54.76 | ||||||||||||
1937 | 27.97 | 36.79 | 42.13 | 46.10 | 57.55 | 65.67 | 76.84 | 77.87 | 71.40 | 56.03 | 43.17 | 41.19 | 53.56 | |||||||||||||
1938 | 37.39 | 40.71 | 41.87 | 49.23 | 56.97 | 66.60 | 74.61 | 74.23 | 69.57 | 53.94 | 36.67 | 40.39 | 53.51 | |||||||||||||
1939 | 36.47 | a | 32.86 | 43.65 | 51.83 | 59.03 | 66.70 | 77.84 | 75.48 | 69.00 | 52.74 | 47.50 | 39.65 | 54.40 | ||||||||||||
1940 | 37.52 | 39.79 | 46.65 | 52.57 | 63.16 | 72.07 | 75.13 | 76.19 | 70.23 | 56.68 | 40.03 | 42.00 | 56.00 | |||||||||||||
1941 | 40.97 | 45.64 | 43.00 | 44.83 | 56.65 | 61.90 | 73.26 | 71.07 | a | 61.90 | 51.19 | 43.40 | 37.90 | 52.64 | ||||||||||||
1942 | 37.06 | 34.21 | 37.65 | 48.40 | 53.26 | 63.87 | 76.57 | a | 73.17 | a | 66.52 | a | 55.35 | 44.47 | 39.20 | a | 52.48 | |||||||||
1943 | 37.03 | 40.58 | b | 45.96 | d | 53.00 | a | 61.24 | b | 66.79 | b | 76.20 | a | 74.73 | a | 70.27 | 56.16 | 42.03 | 39.13 | a | 55.26 | |||||
1944 | 35.61 | 38.66 | 40.55 | b | 47.00 | b | 58.97 | 63.21 | a | 72.87 | 75.35 | 68.43 | b | 58.81 | 43.24 | a | 37.17 | b | 53.32 | |||||||
1945 | 35.30 | a | 38.89 | a | 40.90 | a | 47.03 | 51.90 | 62.72 | a | 77.00 | 76.84 | 69.07 | 59.48 | 39.33 | 33.26 | 52.64 | |||||||||
1946 | 35.26 | 33.79 | 42.45 | 55.69 | a | 58.84 | 69.40 | 76.26 | 77.65 | 70.20 | 51.37 | a | 40.04 | b | 39.59 | b | 54.21 | |||||||||
1947 | 31.55 | 40.11 | a | 44.13 | 51.83 | 62.55 | 69.47 | o | 77.23 | 75.10 | 72.17 | 56.39 | 40.00 | a | 35.58 | 53.33 | a | |||||||||
1948 | 34.68 | 37.05 | i | 39.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.11 | j | ||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.10 | u | ----- | z |
1962 | 37.73 | i | 42.18 | 38.52 | 54.80 | 56.97 | 66.23 | 75.74 | 76.71 | 70.93 | 59.06 | 47.83 | 41.00 | a | 57.27 | a | ||||||||||
1963 | 33.77 | 44.89 | 43.87 | 47.80 | 61.61 | 64.52 | a | 77.93 | b | 74.68 | 69.00 | t | 59.71 | 46.80 | 35.00 | 53.69 | a | |||||||||
1964 | 30.65 | 33.45 | 39.58 | 49.43 | 56.74 | 66.77 | 77.87 | 73.16 | 66.71 | b | 58.84 | 40.53 | 37.26 | 52.58 | ||||||||||||
1965 | 39.45 | 38.25 | 41.26 | 47.97 | 53.84 | 60.03 | 76.23 | 73.87 | 63.17 | 55.35 | 47.67 | 39.10 | 53.02 | |||||||||||||
1966 | 34.32 | 33.65 | b | 41.89 | d | 49.07 | 61.06 | 66.36 | h | 76.74 | 75.58 | 69.27 | 54.68 | 45.87 | ----- | z | 54.21 | b | ||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | 44.23 | 50.03 | 63.71 | 71.00 | 75.77 | 76.43 | a | 71.33 | 60.26 | 49.97 | 36.29 | 59.90 | b | |||||||||
2002 | 37.45 | 40.25 | 42.61 | 54.07 | 58.58 | 70.67 | 77.84 | 75.52 | 69.50 | 55.87 | 48.07 | a | 38.19 | 55.72 | ||||||||||||
2003 | 44.55 | 43.39 | 45.81 | 46.20 | 60.00 | 68.05 | h | 78.58 | 76.77 | 70.63 | 62.65 | 44.34 | a | 38.74 | 55.61 | a | ||||||||||
2004 | 39.68 | 37.52 | 51.97 | a | 52.17 | 60.16 | 67.57 | 75.10 | 74.65 | 68.55 | a | 56.17 | a | 44.53 | 39.39 | 55.62 | ||||||||||
2005 | 41.94 | 43.07 | 41.87 | 47.13 | 58.84 | 65.70 | 74.84 | 74.81 | 67.90 | 58.19 | 46.97 | 39.03 | 55.02 | |||||||||||||
2006 | 37.27 | a | 40.29 | 43.29 | 51.03 | 62.06 | 72.63 | 81.39 | 76.29 | 64.77 | 55.52 | 47.90 | 38.10 | 55.88 | ||||||||||||
2007 | 36.87 | 42.39 | 48.35 | 51.33 | 60.65 | 68.30 | 77.23 | 78.97 | 70.13 | 57.29 | 51.47 | 37.13 | 56.68 | |||||||||||||
2008 | 37.23 | 39.10 | 43.77 | 51.50 | 58.42 | 70.80 | 75.74 | 77.42 | 71.27 | 57.23 | 49.00 | 40.94 | 56.03 | |||||||||||||
2009 | 41.16 | 41.36 | 46.19 | 48.80 | 65.29 | 68.87 | 78.84 | 75.45 | 70.77 | 53.94 | 48.30 | 37.13 | 56.34 | |||||||||||||
2010 | 40.19 | 41.00 | 41.45 | 45.77 | 54.42 | 66.80 | 78.97 | 75.77 | 72.00 | 59.35 | 43.53 | 44.19 | 55.29 | |||||||||||||
2011 | 37.74 | 35.68 | 47.00 | 53.30 | 56.94 | 68.13 | 77.48 | 81.06 | 72.27 | 59.06 | 45.03 | 38.23 | 55.99 | |||||||||||||
2012 | 40.29 | 40.45 | 44.84 | 54.77 | 62.00 | 71.23 | 76.65 | 78.84 | 71.07 | 58.48 | 48.93 | 39.26 | 57.23 | |||||||||||||
2013 | 36.39 | 38.64 | 48.26 | 53.17 | 61.87 | 73.13 | 80.10 | 76.52 | 69.00 | 52.84 | 49.33 | 38.39 | 56.47 | |||||||||||||
2014 | 41.29 | 44.36 | 49.06 | 53.33 | 62.52 | 70.73 | 79.48 | 73.58 | 70.43 | 59.48 | 45.90 | 42.10 | 57.69 | |||||||||||||
2015 | 42.52 | 46.29 | 51.81 | 51.43 | 58.26 | 73.40 | 75.90 | 78.97 | 72.57 | 60.58 | 41.93 | 35.32 | 57.41 | |||||||||||||
2016 | 37.58 | 41.66 | 46.71 | 53.53 | 58.29 | 74.53 | 80.03 | 76.10 | 68.67 | 60.45 | 49.20 | 42.00 | 57.40 | |||||||||||||
2017 | 39.90 | 44.61 | 46.29 | 50.60 | 58.00 | 70.80 | 77.94 | 75.87 | 67.20 | 58.74 | 53.27 | 40.81 | 57.00 | |||||||||||||
2018 | 41.29 | 40.46 | 45.77 | 55.77 | 60.74 | 69.83 | 77.81 | 76.90 | 71.97 | 57.58 | 42.67 | 38.55 | 56.61 | |||||||||||||
2019 | 38.94 | 37.46 | 44.68 | 52.37 | 55.13 | 68.13 | 76.97 | 78.32 | 70.07 | 51.94 | 46.27 | 40.06 | 55.03 | |||||||||||||
2020 | 37.84 | 39.10 | 46.10 | 48.96 | c | 68.45 | 73.88 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.09 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 37.23 | 39.97 | 44.09 | 50.58 | 58.94 | 67.98 | 77.06 | 75.91 | 69.10 | 56.63 | 45.06 | 38.54 | 55.04 | |||||||||||||
S.D. | 3.40 | 3.63 | 3.31 | 3.09 | 3.68 | 3.34 | 1.98 | 1.89 | 2.55 | 2.88 | 3.58 | 2.37 | 1.63 | |||||||||||||
SKEW | -0.39 | -0.44 | 0.42 | -0.05 | 0.07 | -0.18 | 0.02 | 0.10 | -1.05 | -0.15 | -0.08 | -0.04 | -0.11 | |||||||||||||
MAX | 44.55 | 46.29 | 51.97 | 56.23 | 68.45 | 74.53 | 81.39 | 81.06 | 72.57 | 62.65 | 53.27 | 44.19 | 57.69 | |||||||||||||
MIN | 27.97 | 32.50 | 37.65 | 44.83 | 51.90 | 60.03 | 72.87 | 71.07 | 61.90 | 51.19 | 36.67 | 33.26 | 52.48 | |||||||||||||
YRS | 42 | 42 | 44 | 43 | 43 | 39 | 42 | 42 | 41 | 42 | 42 | 41 | 36 |