YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 13.81 | 23.17 | 36.19 | ----- | z | 52.17 | b | 55.43 | a | 40.00 | 27.42 | 21.03 | 14.57 | a | 31.53 | c | ||||||
1971 | 13.97 | b | 14.57 | 18.71 | 29.28 | a | 36.70 | a | 49.53 | 52.16 | 53.50 | a | 40.72 | a | 30.97 | a | 23.50 | b | 15.90 | 31.63 | ||||||
1972 | 9.73 | a | 15.85 | b | ----- | z | 27.23 | 37.84 | 49.80 | 51.55 | 51.97 | 45.20 | 36.83 | b | 17.73 | ----- | z | 34.37 | b | |||||||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.73 | 13.20 | a | 18.47 | j | |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.58 | 53.93 | a | ----- | z | ----- | z | ----- | z | ----- | z | 54.26 | j | |
1976 | 13.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 13.84 | 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 | 2.10 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.10 | 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 | ----- | 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 | 20.10 | a | 14.08 | e | 17.09 | j |
2001 | 21.14 | b | 17.84 | c | 27.38 | b | 35.37 | c | 42.32 | i | 54.35 | j | 61.65 | 59.37 | l | 49.09 | h | 34.68 | l | 29.73 | d | 21.08 | f | 32.18 | f | |
2002 | 17.66 | b | 18.04 | c | 19.90 | b | 34.25 | f | 41.05 | k | 55.32 | k | 59.69 | e | 55.25 | c | 49.07 | b | 32.38 | b | 27.38 | f | 23.00 | f | 36.00 | e |
2003 | 22.54 | e | 13.52 | g | 28.77 | a | 37.71 | b | 43.21 | c | 50.80 | 62.37 | d | 58.81 | e | 45.60 | 43.81 | e | 24.85 | d | 20.81 | d | 39.93 | a | ||
2004 | 20.77 | a | 18.85 | b | 33.91 | h | 35.10 | 45.23 | a | 49.79 | a | 57.65 | 53.21 | c | 49.30 | 39.07 | b | 27.07 | b | 24.43 | h | 39.60 | b | |||
2005 | 23.05 | i | 24.96 | c | 27.66 | b | 34.34 | a | 42.88 | f | 50.88 | d | 59.38 | e | 56.86 | b | 49.76 | e | 38.81 | d | 30.36 | e | 16.53 | l | 41.45 | c |
2006 | 25.14 | c | 19.08 | b | 25.15 | d | 36.12 | e | 45.96 | d | 55.20 | e | 61.50 | c | 57.93 | c | 45.08 | d | 36.29 | c | 25.91 | g | 23.63 | l | 40.74 | b |
2007 | 13.12 | e | 18.12 | b | 33.18 | c | 32.41 | c | 44.14 | c | 51.96 | d | 60.04 | c | 60.32 | c | 49.71 | f | 39.45 | b | 27.09 | g | 18.52 | h | 39.19 | c |
2008 | 14.50 | k | 19.39 | k | 26.48 | h | 31.42 | d | 39.81 | e | 51.89 | b | 60.29 | c | 56.81 | 47.64 | e | 40.69 | e | 30.76 | e | 16.59 | b | 41.77 | c | |
2009 | 21.46 | g | 24.85 | a | 26.36 | c | 33.60 | e | 45.18 | c | 53.25 | b | 56.90 | 55.87 | 48.59 | c | 30.37 | d | 31.63 | c | 14.89 | d | 38.32 | a | ||
2010 | 21.59 | d | 18.77 | b | 29.00 | 34.00 | 40.04 | e | 54.13 | 59.19 | 58.03 | 51.85 | c | 41.43 | c | 27.10 | a | 22.54 | g | 39.56 | a | |||||
2011 | 19.43 | a | 14.39 | 27.43 | a | 32.83 | 39.07 | a | 53.62 | a | 61.19 | 61.70 | a | 50.00 | 39.52 | 28.17 | 19.45 | 37.23 | ||||||||
2012 | 22.47 | a | 18.57 | a | 34.52 | 39.33 | 45.76 | b | 57.30 | 62.65 | 57.06 | 51.14 | a | 36.43 | a | 33.67 | 21.21 | b | 40.01 | |||||||
2013 | 19.13 | a | 19.18 | 25.27 | a | 28.89 | b | 45.13 | 55.33 | 58.83 | a | 59.55 | 53.83 | a | 36.52 | b | 27.67 | 18.35 | 37.31 | |||||||
2014 | 18.81 | d | 16.68 | i | 25.00 | 34.46 | b | 44.87 | ----- | z | 58.64 | f | 57.40 | a | 49.53 | 42.71 | 24.23 | 20.74 | 35.31 | c | ||||||
2015 | 21.60 | a | 21.07 | 30.93 | b | 34.67 | 41.58 | 56.77 | 58.70 | a | 57.48 | b | 54.23 | 43.13 | a | 27.17 | a | 21.10 | 39.04 | |||||||
2016 | 22.16 | 25.50 | a | 28.00 | 34.40 | 40.70 | a | 56.80 | 58.68 | 56.35 | 50.11 | c | 43.26 | 31.97 | a | 14.77 | 38.56 | |||||||||
2017 | 17.97 | 26.63 | a | 33.03 | b | 34.07 | 42.10 | 53.96 | b | 61.44 | f | 56.00 | 52.10 | a | 37.03 | 30.73 | 19.52 | d | 36.65 | a | ||||||
2018 | 21.45 | 15.21 | 28.21 | c | 30.47 | 48.42 | 56.52 | a | 59.09 | i | 60.23 | 54.57 | 40.04 | f | 26.10 | a | 19.85 | k | 37.91 | c | ||||||
2019 | 19.32 | 12.78 | a | 24.74 | 33.38 | d | 38.69 | e | 49.59 | c | 58.87 | a | 57.31 | b | 51.48 | a | 29.35 | 24.47 | 22.29 | 35.19 | ||||||
2020 | 20.69 | o | 15.19 | c | 27.13 | a | 28.96 | d | 44.79 | b | 56.45 | a | 57.70 | a | 56.00 | c | 47.40 | 35.09 | h | 27.77 | 19.90 | 38.13 | b | |||
2021 | 17.52 | 12.00 | 23.39 | h | 29.30 | c | 41.97 | 53.83 | 58.72 | b | 56.11 | m | 47.17 | x | 38.27 | a | 30.31 | a | 24.09 | h | 35.24 | d | ||||
2022 | 18.70 | a | 13.68 | c | 24.76 | b | 31.03 | 42.68 | i | 52.60 | 59.52 | 59.77 | 49.60 | o | 38.78 | h | 21.97 | a | 16.07 | b | 33.12 | c | ||||
2023 | 17.71 | 16.89 | a | 20.48 | 30.77 | 45.68 | 51.57 | 58.40 | a | 57.55 | 51.87 | 37.43 | a | 27.05 | h | 23.27 | e | 37.42 | a | |||||||
2024 | 8.86 | q | 26.92 | c | 25.90 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.92 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.17 | 18.65 | 26.34 | 32.49 | 42.41 | 53.25 | 58.43 | 56.97 | 49.05 | 37.33 | 26.74 | 18.15 | 36.99 | |||||||||||||
S.D. | 4.99 | 4.46 | 4.90 | 3.51 | 3.40 | 2.60 | 3.06 | 2.37 | 3.89 | 4.69 | 4.10 | 3.16 | 2.83 | |||||||||||||
SKEW | -1.61 | 0.54 | -0.65 | -0.53 | -0.27 | 0.05 | -1.00 | -0.11 | -0.81 | -0.58 | -0.37 | -0.05 | -0.96 | |||||||||||||
MAX | 25.14 | 26.92 | 34.52 | 39.33 | 48.42 | 57.30 | 62.65 | 61.70 | 54.57 | 43.81 | 33.67 | 23.27 | 40.01 | |||||||||||||
MIN | 2.10 | 12.00 | 13.81 | 23.17 | 36.19 | 49.53 | 51.55 | 51.97 | 40.00 | 27.42 | 17.73 | 13.20 | 31.63 | |||||||||||||
YRS | 23 | 23 | 22 | 25 | 22 | 22 | 24 | 25 | 22 | 22 | 24 | 18 | 7 |