YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.65 | 22.65 | k | |
1944 | ----- | z | ----- | z | ----- | z | 29.03 | 35.68 | 39.93 | 47.77 | 44.19 | 39.83 | 36.70 | a | 20.80 | 17.39 | 34.59 | c | ||||||||
1945 | ----- | z | 24.14 | 23.35 | 28.40 | 38.00 | 41.53 | 49.87 | 47.03 | 38.47 | 35.84 | 25.80 | 20.13 | 33.87 | a | |||||||||||
1946 | 9.61 | 14.68 | 25.68 | 32.10 | 37.19 | 41.03 | 50.16 | 48.58 | 37.17 | 28.42 | 26.27 | 23.90 | 31.23 | |||||||||||||
1947 | 13.81 | 26.25 | 28.29 | 31.33 | 40.42 | 41.03 | 45.90 | 43.97 | 38.57 | 35.52 | 25.33 | 20.52 | 32.58 | |||||||||||||
1948 | 20.48 | 17.69 | 21.97 | 27.10 | 34.29 | 44.27 | 46.19 | 44.35 | 38.67 | 31.84 | 23.10 | 9.16 | 29.93 | |||||||||||||
1949 | -5.45 | 13.39 | 25.52 | 31.72 | a | 39.19 | 41.60 | 47.35 | 45.16 | 40.57 | 26.39 | 27.43 | 13.65 | 28.88 | ||||||||||||
1950 | 7.55 | 17.21 | 22.84 | 27.47 | 33.77 | 40.43 | 50.81 | 48.45 | 41.97 | 35.58 | 30.07 | 28.65 | 32.07 | |||||||||||||
1951 | 16.97 | 22.18 | 18.23 | 33.43 | 36.45 | 44.37 | 48.23 | 47.87 | 41.43 | 31.06 | 26.83 | 15.03 | 31.84 | |||||||||||||
1952 | 14.84 | 13.21 | 17.23 | a | 29.60 | 37.97 | 40.70 | 50.90 | 46.45 | 44.17 | 38.52 | h | 11.11 | u | 17.26 | 31.23 | b | |||||||||
1953 | 26.00 | 22.89 | a | 23.29 | 27.60 | 30.81 | 37.20 | 49.06 | 45.42 | 42.67 | 31.15 | e | 31.25 | v | 21.48 | 32.51 | a | |||||||||
1954 | 19.68 | 20.21 | 21.16 | 29.87 | 35.94 | 38.13 | 47.74 | 43.70 | a | 36.07 | 30.16 | 28.57 | 17.61 | 30.74 | ||||||||||||
1955 | 7.00 | 10.32 | 20.06 | 25.90 | a | 33.55 | 41.80 | 43.84 | 46.43 | a | 39.43 | 33.42 | ----- | z | 22.16 | 29.45 | a | |||||||||
1956 | 20.97 | 13.66 | 19.61 | 30.50 | 37.81 | 39.60 | 47.81 | 41.81 | 36.53 | 29.92 | e | ----- | z | ----- | z | 31.82 | b | |||||||||
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 | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 23.45 | k | 28.05 | j | 27.20 | k | 33.38 | i | 37.62 | j | 43.71 | i | 48.07 | b | 47.54 | e | 39.75 | f | 32.55 | i | 21.96 | e | 20.50 | g | 39.19 | i |
2001 | 20.23 | e | 21.43 | e | 27.57 | h | 27.96 | g | 38.18 | n | 40.94 | l | 47.50 | k | 48.06 | m | 42.26 | k | 32.96 | e | 26.81 | d | 21.10 | b | 24.51 | g |
2002 | 20.10 | j | 21.14 | f | 24.03 | b | 31.04 | d | 36.16 | f | 43.58 | f | 50.71 | c | 45.92 | e | 41.37 | c | 26.28 | m | 25.92 | e | 23.43 | x | 36.50 | f |
2003 | 34.88 | w | 24.39 | 28.52 | 30.40 | 36.77 | 44.17 | 52.23 | 47.37 | a | 41.34 | a | 35.23 | 23.82 | b | 23.80 | a | 35.28 | a | |||||||
2004 | 21.71 | 19.32 | a | 28.55 | 30.67 | 34.45 | 41.87 | 49.48 | 48.48 | 37.20 | 32.40 | a | 23.83 | 25.10 | 32.76 | |||||||||||
2005 | 20.61 | 23.96 | 28.23 | 29.67 | 38.17 | a | 38.03 | a | 51.16 | f | 47.87 | 36.37 | 30.77 | 26.70 | 20.52 | 30.99 | a | |||||||||
2006 | 24.26 | 18.11 | 23.74 | 31.40 | 38.93 | a | 48.78 | l | 51.37 | a | 45.84 | 39.43 | 29.90 | 27.83 | 20.13 | 31.90 | a | |||||||||
2007 | 12.90 | 23.86 | 27.83 | b | 30.20 | 36.19 | 40.50 | 51.61 | 46.61 | 37.23 | 30.58 | 26.50 | 15.68 | 31.64 | ||||||||||||
2008 | 14.77 | 15.64 | a | 19.68 | 26.17 | a | 36.87 | 39.30 | 50.29 | 48.26 | 38.83 | 32.52 | 29.67 | 17.30 | a | 30.78 | ||||||||||
2009 | 16.50 | a | 21.14 | 25.10 | 28.70 | 38.32 | 42.93 | 50.39 | 46.13 | 41.50 | 30.52 | 22.90 | 15.39 | 31.63 | ||||||||||||
2010 | 28.16 | 27.00 | 25.45 | 27.03 | 31.00 | 41.17 | 48.06 | 46.03 | 36.93 | 35.00 | 27.08 | d | 28.40 | a | 33.44 | |||||||||||
2011 | 19.68 | c | 21.19 | a | 28.48 | 27.66 | a | 31.55 | 39.10 | 46.94 | 48.00 | b | 41.90 | 32.00 | 24.70 | 17.39 | 31.55 | |||||||||
2012 | 20.35 | 20.97 | 26.38 | b | 32.37 | 34.32 | 39.50 | 48.48 | 48.42 | 41.57 | 32.65 | 28.13 | 17.77 | 32.58 | ||||||||||||
2013 | 13.00 | e | 18.68 | 26.97 | 29.57 | 35.39 | 42.97 | 51.71 | 45.42 | 40.77 | 27.35 | 24.57 | 14.11 | c | 30.87 | |||||||||||
2014 | 22.00 | 25.96 | 28.13 | 29.28 | a | 35.77 | 41.93 | 53.19 | 49.55 | 43.37 | 34.81 | 28.03 | 29.65 | 35.14 | ||||||||||||
2015 | 25.97 | 29.46 | 29.19 | 27.23 | 37.58 | 49.00 | 51.39 | 47.29 | 39.03 | 35.00 | 21.60 | 19.57 | a | 34.36 | ||||||||||||
2016 | 24.25 | c | 25.00 | 29.35 | 33.72 | a | 37.55 | 43.63 | 47.77 | 48.52 | 38.07 | 34.78 | d | 29.80 | 14.94 | 33.95 | ||||||||||
2017 | 13.52 | b | 25.52 | a | 29.57 | a | 29.67 | 36.65 | 44.41 | a | 51.28 | b | 51.03 | a | 42.27 | 28.19 | 28.67 | 17.00 | 33.15 | |||||||
2018 | 26.77 | 20.08 | d | 23.18 | c | 30.87 | 40.00 | 41.47 | 49.74 | 46.77 | 36.87 | 29.71 | 22.63 | 18.45 | 32.21 | |||||||||||
2019 | 22.90 | 20.08 | d | 23.77 | 33.80 | 37.23 | 41.50 | 47.77 | 48.81 | 38.40 | 25.52 | 23.33 | 23.52 | 32.22 | ||||||||||||
2020 | 24.29 | 21.07 | 24.23 | 29.20 | 36.35 | 41.57 | 47.42 | 49.26 | 41.53 | 30.65 | 23.10 | 19.00 | 32.31 | |||||||||||||
2021 | 20.87 | 21.25 | 23.45 | 26.07 | 35.10 | 46.77 | 54.65 | 47.10 | 39.10 | 32.19 | 27.23 | 20.42 | 32.85 | |||||||||||||
2022 | 18.97 | b | 18.46 | 27.39 | 25.77 | 31.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.49 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.17 | 20.56 | 24.80 | 29.54 | 36.09 | 41.66 | 49.34 | 46.87 | 39.66 | 31.84 | 25.77 | 19.66 | 32.12 | |||||||||||||
S.D. | 7.04 | 4.47 | 3.43 | 2.25 | 2.47 | 2.51 | 2.28 | 1.92 | 2.22 | 2.88 | 2.56 | 4.52 | 1.41 | |||||||||||||
SKEW | -1.30 | -0.31 | -0.45 | 0.08 | -0.54 | 0.80 | 0.00 | -0.42 | 0.12 | -0.25 | -0.16 | 0.29 | -0.05 | |||||||||||||
MAX | 28.16 | 29.46 | 29.57 | 33.80 | 40.42 | 49.00 | 54.65 | 51.03 | 44.17 | 36.70 | 30.07 | 29.65 | 35.14 | |||||||||||||
MIN | -5.45 | 10.32 | 17.23 | 25.77 | 30.81 | 37.20 | 43.84 | 41.81 | 36.07 | 25.52 | 20.80 | 9.16 | 28.88 | |||||||||||||
YRS | 31 | 33 | 33 | 34 | 33 | 31 | 33 | 34 | 33 | 32 | 31 | 33 | 23 |