YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1928 | ----- | z | ----- | z | ----- | z | ----- | z | 52.69 | w | 55.45 | s | 61.55 | l | 64.47 | p | 53.78 | e | 43.26 | l | ----- | z | ----- | z | 53.78 | k |
1929 | ----- | z | ----- | z | ----- | z | 46.29 | w | 48.63 | a | 56.30 | g | 64.07 | i | 62.39 | h | 55.30 | c | 43.91 | o | ----- | z | ----- | z | 51.96 | j |
1930 | ----- | z | ----- | z | ----- | z | 43.86 | i | 51.65 | e | 63.64 | a | 65.43 | c | 66.59 | i | 57.10 | i | 42.52 | k | ----- | z | ----- | z | 60.24 | i |
1931 | ----- | z | ----- | z | ----- | z | 42.80 | b | 50.52 | 63.55 | 68.50 | 60.80 | c | 61.48 | 51.65 | d | 35.18 | b | 25.85 | k | 54.31 | d | ||||
1932 | 20.29 | e | 15.26 | 17.31 | 37.98 | a | 52.50 | b | 62.75 | b | 65.52 | 65.13 | 53.23 | 42.67 | d | ----- | z | ----- | z | 43.26 | b | |||||
1933 | ----- | z | ----- | z | ----- | z | 36.89 | c | 52.08 | 66.45 | 68.58 | 61.18 | 59.45 | 40.41 | c | ----- | z | ----- | z | 55.01 | e | |||||
1934 | ----- | z | ----- | z | ----- | z | 37.31 | d | 55.61 | c | 61.48 | 65.10 | 59.34 | 52.06 | d | 47.21 | ----- | z | ----- | z | 54.01 | e | ||||
1935 | ----- | z | ----- | z | ----- | z | 37.07 | c | 47.52 | 57.11 | b | 69.84 | 63.29 | 52.77 | b | 45.22 | d | ----- | z | ----- | z | 53.26 | e | |||
1936 | ----- | z | ----- | z | ----- | z | 32.57 | 53.89 | 57.02 | 69.39 | 64.34 | 59.48 | b | 40.05 | c | ----- | z | ----- | z | 53.82 | e | |||||
1937 | ----- | z | ----- | z | ----- | z | 38.05 | b | 54.03 | a | 61.45 | a | 66.34 | 69.35 | 53.68 | b | 40.53 | b | ----- | z | ----- | z | 54.78 | e | ||
1938 | ----- | z | ----- | z | ----- | z | 42.38 | f | 50.91 | b | 60.93 | 65.02 | 67.76 | d | 57.11 | l | 45.08 | k | 24.89 | c | 14.05 | b | 47.26 | f | ||
1939 | 14.77 | c | 4.58 | b | 19.88 | f | 36.48 | c | 54.83 | a | 61.65 | 66.31 | 63.61 | 55.05 | b | 42.74 | b | 32.62 | 26.85 | a | 41.77 | a | ||||
1940 | 4.97 | b | 17.46 | a | 20.03 | b | 37.00 | d | 48.40 | 59.12 | 65.79 | 62.73 | 57.48 | 48.03 | 25.76 | g | 18.39 | i | 42.10 | b | ||||||
1941 | 16.07 | b | 17.12 | h | 21.31 | b | 43.52 | 54.21 | 59.03 | 66.44 | 62.23 | a | 56.78 | 44.95 | 31.07 | a | 23.24 | 43.53 | a | |||||||
1942 | 15.29 | 12.70 | a | 28.58 | 38.83 | j | 48.42 | 60.45 | ----- | z | 64.07 | a | 52.79 | b | 43.58 | 28.07 | a | 8.82 | 36.28 | b | ||||||
1943 | 3.84 | 11.84 | c | 15.79 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.93 | b | 13.66 | f | 14.35 | h | ||
1944 | 19.41 | b | 12.05 | a | 20.68 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.93 | 15.08 | e | 20.63 | g | ||
1945 | 6.71 | 11.02 | 32.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 12.30 | f | 16.83 | i | |||
1946 | 9.68 | f | 8.09 | a | 34.82 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.60 | 19.17 | i | |
1947 | 12.48 | 10.39 | 20.23 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.78 | n | 14.08 | 14.30 | h | |||
1948 | 4.83 | b | 9.52 | b | 21.86 | c | ----- | z | ----- | z | ----- | z | ----- | z | 67.76 | ----- | z | ----- | z | ----- | z | ----- | z | 25.99 | h | |
1949 | ----- | z | 19.00 | q | 20.87 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.87 | k |
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 | ----- | 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 | 65.07 | c | ----- | z | ----- | z | ----- | z | ----- | z | 65.07 | k |
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 | 13.33 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.38 | f | ----- | z | ----- | z | 13.33 | k |
1971 | ----- | z | 14.55 | 24.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.73 | j | ||
1972 | ----- | z | ----- | z | ----- | z | 37.30 | 56.73 | 61.28 | a | 64.81 | 65.38 | a | ----- | z | 43.13 | ----- | z | ----- | z | 54.77 | f | ||||
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 | 39.47 | a | ----- | z | 6.62 | f | 39.47 | k |
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 | -0.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -0.40 | k | |
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 | 26.12 | a | 25.74 | d | 25.93 | j |
1998 | 16.00 | d | 31.80 | a | 28.32 | a | 43.38 | a | 57.92 | a | 59.76 | a | 66.29 | 67.32 | 60.05 | 47.98 | 34.72 | a | 21.17 | b | 44.56 | |||||
1999 | 7.03 | b | 21.54 | b | 30.50 | 42.00 | 55.35 | a | 63.21 | a | 69.17 | b | 64.23 | 56.12 | a | 42.31 | b | 37.88 | b | 19.75 | c | 42.42 | ||||
2000 | 10.71 | 21.60 | c | 34.55 | 39.77 | 54.75 | a | 58.25 | 65.55 | a | 64.98 | a | 54.46 | c | 48.10 | 31.40 | 5.32 | f | 44.01 | a | ||||||
2001 | 17.38 | e | 8.07 | a | 25.18 | a | 42.03 | a | 54.06 | 62.48 | 66.98 | 67.16 | 55.13 | 43.31 | 40.88 | 25.26 | 42.33 | |||||||||
2002 | 18.79 | 22.76 | a | 18.87 | 38.80 | 47.92 | 62.85 | 70.13 | 64.47 | a | 58.35 | 37.77 | 27.70 | 21.35 | 40.81 | |||||||||||
2003 | 9.23 | 8.73 | b | 24.31 | 38.27 | 50.92 | 60.03 | 66.21 | 67.53 | 57.57 | 44.48 | 29.33 | 21.11 | 39.81 | ||||||||||||
2004 | 5.57 | b | 17.67 | c | 30.02 | 39.96 | b | 49.47 | b | 57.97 | a | ----- | z | 58.66 | ----- | z | 46.50 | 33.88 | 16.40 | a | 35.61 | b | ||||
2005 | 6.81 | 20.21 | 23.81 | 44.63 | 49.95 | 65.08 | 69.05 | b | 64.23 | 60.07 | 46.88 | b | 32.71 | d | 18.33 | a | 41.81 | |||||||||
2006 | 25.06 | 13.16 | 29.95 | b | 46.35 | 55.06 | d | 62.60 | a | 71.78 | a | 65.94 | 53.66 | a | 40.68 | ----- | z | 23.82 | c | 44.37 | a | |||||
2007 | 15.58 | a | 8.06 | d | 30.95 | a | ----- | z | 57.07 | b | 65.19 | a | 67.37 | a | 65.52 | 57.21 | d | 46.87 | d | 30.70 | c | 13.67 | g | 44.45 | b | |
2008 | 12.14 | b | 10.20 | d | 20.35 | e | 38.78 | ----- | z | ----- | z | 66.05 | 63.87 | a | 55.96 | e | 44.82 | a | 30.12 | a | 8.33 | a | 35.06 | b | ||
2009 | 0.65 | a | 15.93 | 25.56 | 39.50 | 52.21 | 59.90 | 60.76 | 61.85 | 60.33 | 38.58 | 37.62 | 12.77 | 38.81 | ||||||||||||
2010 | 9.39 | 14.52 | 35.32 | 46.47 | 54.66 | 60.73 | 68.69 | 68.26 | 51.28 | 45.21 | 30.68 | 13.69 | 41.58 | |||||||||||||
2011 | 7.92 | 15.00 | 25.42 | 38.95 | 49.50 | 59.00 | 69.81 | 65.21 | 54.45 | 47.50 | 32.62 | 21.84 | 40.60 | |||||||||||||
2012 | 17.55 | 23.10 | 39.63 | 41.65 | 54.44 | 63.22 | 70.89 | 63.73 | 53.60 | 40.82 | 30.17 | 18.40 | 43.10 | |||||||||||||
2013 | 12.63 | 14.07 | 21.52 | 33.20 | 49.02 | 58.88 | 64.47 | 64.55 | 56.72 | 43.45 | 27.88 | 5.39 | 37.65 | |||||||||||||
2014 | 1.29 | 6.36 | 21.45 | 34.93 | 50.87 | 62.17 | 64.16 | 63.94 | 54.98 | 43.63 | 21.57 | 21.23 | 37.21 | |||||||||||||
2015 | 13.27 | 4.91 | 29.24 | 41.40 | 51.18 | 60.58 | 66.68 | 63.92 | a | 60.43 | 44.39 | 35.53 | 27.61 | 41.60 | ||||||||||||
2016 | 13.55 | 18.33 | 32.71 | 39.08 | 52.18 | 60.30 | 66.13 | a | 65.37 | 58.38 | 47.16 | 38.23 | 16.94 | 42.36 | ||||||||||||
2017 | 15.97 | 23.55 | 26.77 | 41.07 | 49.61 | 60.78 | 64.44 | 60.08 | a | 59.25 | 45.74 | 27.73 | 12.03 | 40.59 | ||||||||||||
2018 | 11.44 | 10.77 | 26.90 | 32.28 | 56.82 | a | 61.75 | 66.84 | 64.94 | 56.74 | g | 40.56 | 24.11 | b | 22.02 | 38.04 | a | |||||||||
2019 | 8.03 | 9.32 | 24.00 | 39.23 | 47.85 | 60.02 | 68.10 | 62.84 | 57.95 | 42.52 | 25.35 | 18.65 | 38.65 | |||||||||||||
2020 | 17.94 | 16.45 | 31.65 | 37.95 | 51.34 | 64.15 | 69.13 | 65.82 | 54.28 | 38.24 | 35.60 | 20.42 | 41.91 | |||||||||||||
2021 | 16.82 | 8.61 | 34.18 | 40.32 | 52.10 | 65.52 | 66.76 | 67.40 | 58.57 | 50.65 | 31.47 | 19.63 | 42.67 | |||||||||||||
2022 | 4.06 | 8.12 | 24.92 | 35.30 | b | 53.20 | f | 62.35 | 66.06 | 65.53 | 57.32 | 45.95 | 32.23 | 14.52 | 37.85 | a | ||||||||||
2023 | 18.63 | 16.84 | 25.03 | 38.02 | c | 53.44 | 63.05 | 65.05 | 64.50 | 61.70 | 47.13 | 31.92 | 30.61 | 42.99 | ||||||||||||
2024 | 18.69 | 28.21 | 31.23 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.04 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 11.85 | 14.33 | 26.45 | 39.18 | 52.25 | 61.43 | 66.94 | 64.48 | 56.52 | 44.13 | 31.27 | 18.55 | 41.13 | |||||||||||||
S.D. | 6.21 | 6.30 | 5.66 | 3.43 | 2.88 | 2.29 | 2.21 | 2.39 | 2.83 | 3.38 | 4.52 | 5.86 | 1.96 | |||||||||||||
SKEW | -0.17 | 0.76 | 0.23 | 0.12 | 0.11 | 0.10 | -0.03 | -0.38 | 0.08 | 0.03 | -0.02 | -0.17 | -0.52 | |||||||||||||
MAX | 25.06 | 31.80 | 39.63 | 46.47 | 57.92 | 66.45 | 71.78 | 69.35 | 61.70 | 51.65 | 40.88 | 30.61 | 44.56 | |||||||||||||
MIN | -0.40 | 4.58 | 15.79 | 32.28 | 47.52 | 57.02 | 60.76 | 58.66 | 51.28 | 37.77 | 21.57 | 5.39 | 37.21 | |||||||||||||
YRS | 38 | 39 | 39 | 36 | 39 | 39 | 38 | 41 | 37 | 39 | 33 | 32 | 19 |