YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1943 | ----- | z | ----- | z | ----- | z | ----- | z | 44.60 | j | 50.83 | 61.29 | 58.52 | a | 52.39 | b | 41.81 | b | 31.47 | 16.68 | 44.71 | e | ||||
1944 | 13.02 | a | 19.50 | a | 21.25 | a | 36.54 | b | 45.10 | 50.19 | a | 57.40 | 55.81 | 49.78 | c | 46.08 | m | 23.95 | a | 16.90 | 35.40 | a | ||||
1945 | 23.68 | 23.59 | 29.20 | c | 33.02 | b | 45.23 | a | 49.40 | 59.73 | 58.79 | 48.57 | 43.37 | 23.70 | c | 14.92 | a | 37.77 | ||||||||
1946 | 16.82 | c | 16.00 | o | 30.87 | 38.78 | a | 42.91 | b | 51.69 | c | 59.97 | 56.95 | l | 49.04 | b | 35.23 | a | 28.15 | 23.13 | a | 37.66 | b | |||
1947 | 16.26 | 23.70 | 31.38 | b | 38.09 | a | 47.94 | 48.70 | 59.87 | 56.47 | a | 49.43 | 44.81 | 25.10 | a | 22.73 | 38.71 | |||||||||
1948 | 17.97 | 20.09 | 23.52 | a | 34.90 | d | ----- | z | 55.59 | a | 55.54 | r | 56.10 | ----- | z | ----- | z | ----- | z | ----- | z | 34.69 | f | |||
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 | ----- | 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 | 30.12 | a | 37.55 | 44.12 | a | 50.35 | d | 57.23 | 56.78 | d | 50.92 | d | 39.85 | g | 34.42 | f | 20.30 | a | 43.42 | d | ||
1996 | 22.21 | c | 20.02 | b | 27.32 | f | 39.88 | f | 41.25 | c | 54.02 | d | 61.25 | a | 57.62 | e | ----- | z | 37.42 | e | 30.90 | e | 24.20 | d | 38.77 | c |
1997 | 19.74 | f | 18.30 | e | 30.25 | a | 32.67 | g | 47.72 | d | 54.23 | d | 58.40 | b | 58.12 | e | 51.25 | d | 38.65 | e | 28.77 | f | 15.86 | c | 41.42 | c |
1998 | 20.41 | c | 20.57 | 28.89 | c | 37.50 | b | 44.20 | c | 49.00 | b | 61.16 | b | 58.79 | c | 53.08 | d | 38.81 | d | 28.92 | d | 18.85 | g | 40.12 | a | |
1999 | 24.96 | d | 21.54 | c | 24.57 | c | 32.48 | d | 41.41 | d | 48.63 | c | 55.63 | a | 59.05 | b | 47.84 | e | 43.15 | d | 33.61 | b | 19.09 | c | 37.66 | |
2000 | 18.80 | d | 23.06 | e | 26.48 | a | 40.17 | d | 45.75 | c | 53.57 | b | 59.95 | b | 56.94 | 47.66 | e | 39.26 | d | 15.32 | b | 17.92 | e | 37.07 | ||
2001 | 15.87 | d | 15.62 | c | 28.83 | b | 36.54 | d | 44.11 | c | 52.78 | e | 57.92 | e | 59.62 | a | 51.52 | b | 38.53 | 30.43 | 13.38 | f | 39.25 | a | ||
2002 | 19.26 | d | 17.39 | f | 22.95 | b | 34.32 | h | 43.41 | d | 51.89 | c | 60.45 | b | 54.48 | c | 48.35 | d | 33.65 | d | 28.19 | c | 27.94 | e | 39.06 | b |
2003 | 25.43 | c | 19.65 | a | 32.45 | a | 37.19 | c | 44.98 | e | 50.71 | d | 61.55 | b | 60.02 | c | 49.39 | c | 42.72 | f | 20.67 | c | 19.13 | e | 38.29 | a |
2004 | 16.25 | c | 17.43 | b | 34.17 | e | 40.02 | b | 44.88 | c | 52.25 | b | 58.33 | a | 55.82 | a | 46.94 | c | 38.66 | 28.07 | b | 25.91 | c | 38.23 | ||
2005 | 21.84 | f | ----- | z | 31.92 | a | 35.66 | e | 44.05 | a | 49.07 | b | 58.14 | b | 58.84 | c | 48.69 | d | 41.84 | 23.83 | d | 15.50 | d | 40.75 | b | |
2006 | 22.67 | d | 16.28 | a | 25.38 | c | 38.28 | c | 48.09 | d | 55.04 | f | 62.00 | d | 56.46 | d | 50.44 | e | 37.89 | d | 29.05 | a | 15.68 | a | 36.57 | a |
2007 | 13.59 | h | 26.27 | d | 33.44 | f | 39.66 | e | 45.41 | d | 57.32 | e | 65.28 | a | 57.88 | a | 53.91 | s | 38.66 | o | 24.44 | m | 15.06 | f | 48.64 | f |
2008 | 11.70 | a | 22.73 | a | 22.89 | d | 28.06 | f | 45.00 | b | 50.80 | c | 58.35 | d | 58.43 | d | 47.00 | b | ----- | z | 32.94 | c | 18.52 | 36.84 | b | |
2009 | 20.40 | f | 22.44 | b | 25.60 | b | 35.37 | c | 45.18 | c | 51.17 | c | 57.10 | b | 57.03 | b | 53.41 | c | 34.52 | d | 27.07 | c | 13.98 | f | 40.89 | b |
2010 | 18.63 | d | 19.88 | c | 30.58 | 35.68 | b | 39.35 | d | 50.31 | a | 56.58 | e | 53.63 | e | 49.58 | 42.42 | 23.89 | b | 13.48 | f | 38.23 | a | |||
2011 | 21.05 | b | 17.81 | b | 28.14 | b | 32.97 | 41.65 | a | 50.00 | f | 58.36 | c | 58.31 | b | 52.33 | a | 39.95 | 27.00 | 20.59 | d | 36.20 | a | |||
2012 | 21.66 | c | 32.85 | c | ----- | z | 41.03 | a | 43.12 | g | 51.94 | d | 60.95 | b | 58.47 | b | 49.92 | 38.69 | 26.58 | 15.26 | 39.73 | b | ||||
2013 | 15.18 | 22.71 | 29.48 | 33.58 | 45.98 | 53.60 | 61.11 | 58.44 | 52.70 | 37.03 | 27.44 | d | 18.19 | 37.95 | ||||||||||||
2014 | 26.45 | 17.00 | a | 27.94 | 37.30 | 46.66 | b | ----- | z | 60.73 | a | 58.16 | b | 48.02 | 44.26 | 22.37 | 21.89 | 37.34 | a | |||||||
2015 | 24.10 | 28.23 | 35.56 | 37.73 | 42.93 | a | 57.93 | 57.22 | a | 56.28 | a | 50.43 | a | 44.29 | e | 21.27 | 17.92 | 39.49 | ||||||||
2016 | 17.80 | a | 27.59 | 32.39 | 41.10 | 44.03 | b | 54.50 | b | 57.58 | 55.85 | 48.75 | 42.58 | a | 34.52 | a | 13.15 | a | 39.15 | |||||||
2017 | 7.28 | a | 21.54 | c | 34.67 | a | 37.05 | a | 45.95 | 55.25 | 61.37 | 59.02 | a | 48.98 | a | 37.71 | ----- | z | 19.31 | 38.92 | a | |||||
2018 | ----- | z | 20.12 | 25.06 | 37.29 | d | 48.32 | 52.70 | ----- | z | 58.28 | a | 48.02 | 41.00 | 25.72 | a | 18.61 | 37.51 | b | |||||||
2019 | 15.62 | b | 10.80 | 18.95 | 37.70 | 43.73 | a | 51.64 | a | ----- | z | 58.42 | 51.77 | 31.13 | 28.58 | 22.93 | a | 33.75 | a | |||||||
2020 | 21.29 | 19.31 | b | 27.05 | 35.88 | 46.16 | 50.92 | ----- | z | ----- | z | ----- | z | 38.35 | 25.60 | a | 19.95 | 31.61 | c | |||||||
2021 | 19.42 | 16.86 | ----- | z | 37.25 | b | ----- | z | 58.62 | 63.06 | 56.29 | 50.00 | 40.90 | a | 33.70 | 24.37 | a | 40.05 | b | |||||||
2022 | 19.82 | 22.45 | 31.69 | 31.43 | ----- | z | 51.72 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.42 | g | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.02 | 20.96 | 28.35 | 36.82 | 44.67 | 52.30 | 59.58 | 57.51 | 49.87 | 39.48 | 27.07 | 19.50 | 38.25 | |||||||||||||
S.D. | 4.42 | 4.32 | 4.14 | 2.49 | 2.13 | 2.66 | 2.19 | 1.51 | 1.84 | 3.42 | 4.39 | 3.66 | 0.81 | |||||||||||||
SKEW | -0.53 | 0.46 | -0.34 | -0.32 | -0.37 | 0.75 | 0.39 | -0.64 | 0.33 | -0.44 | -0.42 | 0.46 | 0.20 | |||||||||||||
MAX | 26.45 | 32.85 | 35.56 | 41.10 | 48.32 | 58.62 | 65.28 | 60.02 | 53.41 | 44.81 | 34.52 | 27.94 | 39.49 | |||||||||||||
MIN | 7.28 | 10.80 | 18.95 | 31.43 | 39.35 | 48.63 | 55.63 | 53.63 | 46.94 | 31.13 | 15.32 | 13.15 | 37.07 | |||||||||||||
YRS | 27 | 29 | 29 | 29 | 29 | 31 | 29 | 31 | 29 | 27 | 28 | 27 | 8 |