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 | 27.71 | 39.50 | a | 55.67 | a | ----- | z | 69.55 | b | 69.65 | a | 55.70 | 40.92 | 33.95 | b | 28.45 | b | 46.79 | c | |||
1971 | 26.52 | d | 26.06 | a | 33.73 | a | 43.88 | a | 50.74 | b | 67.62 | 68.30 | a | 69.28 | a | 57.07 | c | 45.42 | a | 36.63 | c | 28.08 | a | 46.11 | ||
1972 | 24.40 | b | 30.69 | b | ----- | z | 44.79 | b | 53.23 | 66.60 | 68.32 | a | 66.94 | 59.09 | b | 49.00 | b | 26.26 | a | ----- | z | 48.93 | b | |||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.48 | a | 25.76 | b | 31.12 | j |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.08 | 70.67 | a | ----- | z | ----- | z | ----- | z | ----- | z | 71.37 | j | |
1976 | 26.79 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.79 | 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 | 14.52 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.52 | 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 | 29.40 | a | 26.73 | e | 28.06 | j |
2001 | 30.36 | b | 30.15 | d | 37.32 | c | 47.54 | c | 53.43 | i | 69.83 | j | 75.65 | 72.79 | l | 62.89 | h | 49.55 | l | 41.02 | d | 31.62 | f | 43.67 | f | |
2002 | 29.19 | b | 30.54 | c | 34.24 | b | 48.81 | f | 56.65 | k | 69.00 | k | 74.44 | e | 69.54 | c | 61.80 | b | 44.48 | b | 36.65 | f | 33.00 | f | 49.18 | e |
2003 | 34.40 | e | 23.90 | g | 39.73 | a | 49.86 | b | 55.45 | c | 62.55 | 77.57 | d | 73.04 | e | 59.10 | 57.15 | e | 35.88 | d | 33.59 | d | 52.58 | a | ||
2004 | 32.60 | a | 28.91 | b | 47.91 | h | 47.60 | 58.90 | a | 62.45 | a | 69.56 | 66.14 | c | 62.82 | 51.21 | b | 36.48 | b | 34.50 | h | 51.67 | b | |||
2005 | 33.73 | i | 35.34 | c | 39.34 | b | 45.67 | a | 56.40 | f | 65.08 | d | 74.13 | e | 69.81 | b | 63.94 | e | 51.87 | d | 43.14 | e | 29.06 | m | 54.26 | c |
2006 | 37.96 | c | 31.25 | b | 38.91 | d | 50.20 | e | 60.11 | d | 69.94 | e | 74.36 | c | 69.54 | c | 57.50 | d | 48.55 | c | 38.85 | g | 34.50 | l | 53.83 | b |
2007 | 23.87 | e | 29.42 | b | 44.93 | c | 44.30 | c | 56.62 | c | 65.46 | d | 73.32 | c | 73.21 | c | 62.85 | f | 53.24 | b | 41.22 | g | 29.20 | i | 51.60 | c |
2008 | 25.88 | k | 30.69 | k | 38.48 | h | 44.50 | d | 54.15 | e | 65.75 | b | 74.16 | c | 67.98 | 60.78 | e | 51.90 | e | 42.44 | f | 27.40 | b | 55.83 | d | |
2009 | 32.15 | g | 37.85 | a | 38.95 | c | 44.62 | e | 56.46 | c | 64.96 | b | 69.29 | 68.52 | 59.83 | c | 40.89 | d | 43.09 | c | 24.46 | d | 49.90 | a | ||
2010 | 31.80 | d | 27.02 | b | 39.15 | 46.87 | 53.02 | e | 67.77 | 72.79 | 71.02 | 66.35 | c | 53.84 | c | 38.59 | a | 34.35 | g | 51.65 | a | |||||
2011 | 29.75 | a | 26.23 | 40.65 | a | 46.63 | 51.45 | a | 67.36 | a | 74.90 | 75.10 | a | 62.12 | 51.68 | 40.35 | 28.95 | 49.60 | ||||||||
2012 | 34.25 | a | 26.95 | a | 47.19 | 51.85 | 58.67 | b | 72.45 | 76.90 | 71.69 | 64.07 | a | 48.33 | a | 45.97 | 31.55 | c | 52.49 | |||||||
2013 | 29.95 | a | 29.89 | 37.10 | b | 41.05 | b | 57.06 | 69.63 | 71.12 | a | 72.00 | 65.34 | a | 47.88 | b | 39.03 | 29.32 | 49.12 | |||||||
2014 | 29.48 | d | 26.82 | i | 37.84 | 45.96 | b | 56.82 | ----- | z | 71.66 | f | 69.47 | a | 62.42 | 54.03 | 35.53 | 30.68 | 46.91 | c | ||||||
2015 | 32.28 | a | 31.84 | 41.33 | b | 47.78 | 51.39 | 67.82 | 70.88 | a | 70.76 | b | 67.93 | 54.25 | a | 38.50 | a | 30.60 | 50.45 | |||||||
2016 | 32.05 | 36.23 | a | 40.81 | 45.88 | 52.33 | a | 70.20 | 73.16 | 69.40 | 64.06 | c | 57.02 | 44.43 | a | 26.42 | 51.00 | |||||||||
2017 | 28.47 | 38.96 | a | 46.05 | b | 46.07 | 53.65 | 67.79 | b | 74.02 | f | 67.87 | 64.21 | a | 49.37 | 44.22 | 31.69 | d | 48.94 | a | ||||||
2018 | 33.68 | 28.36 | 41.52 | c | 44.47 | 61.63 | 71.60 | a | 72.18 | i | 72.29 | 68.75 | 51.16 | f | 37.00 | a | 31.68 | k | 51.03 | c | ||||||
2019 | 30.45 | 26.37 | a | 35.92 | 46.94 | d | 50.06 | e | 63.31 | c | 73.37 | a | 71.72 | b | 66.79 | a | 43.84 | 36.53 | 33.45 | 48.23 | ||||||
2020 | 32.91 | o | 26.75 | c | 41.80 | a | 43.94 | d | 59.12 | b | 71.95 | a | 72.75 | a | 72.70 | c | 61.53 | 49.39 | h | 41.58 | 30.48 | 52.26 | b | |||
2021 | 28.90 | 23.11 | 34.98 | h | 41.80 | c | 53.31 | 68.03 | 73.71 | b | 73.36 | m | 63.67 | x | 52.30 | a | 44.19 | a | 37.72 | h | 48.17 | d | ||||
2022 | 31.22 | a | 26.66 | c | 37.67 | b | 46.22 | 56.76 | j | 67.43 | 73.89 | 73.38 | a | 65.57 | o | 52.54 | h | 35.07 | a | 28.95 | c | 46.72 | c | |||
2023 | 24.84 | 27.74 | a | 33.13 | 45.17 | 57.35 | 63.33 | a | 71.29 | b | 70.73 | 66.22 | 51.48 | a | 38.75 | j | 34.13 | e | 49.58 | a | ||||||
2024 | 21.92 | s | 37.96 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.96 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.47 | 30.19 | 38.86 | 45.72 | 55.33 | 67.23 | 72.73 | 70.50 | 62.61 | 49.94 | 38.41 | 29.48 | 49.57 | |||||||||||||
S.D. | 4.73 | 4.36 | 4.41 | 2.74 | 3.23 | 2.95 | 2.52 | 2.17 | 3.58 | 4.60 | 4.85 | 2.78 | 2.05 | |||||||||||||
SKEW | -1.23 | 0.70 | -0.34 | -0.02 | 0.13 | 0.06 | -0.14 | 0.02 | -0.17 | -0.48 | -0.58 | 0.04 | -0.32 | |||||||||||||
MAX | 37.96 | 38.96 | 47.19 | 51.85 | 61.63 | 72.45 | 77.57 | 75.10 | 68.75 | 57.15 | 45.97 | 34.13 | 52.49 | |||||||||||||
MIN | 14.52 | 23.11 | 27.71 | 39.50 | 50.06 | 62.45 | 68.30 | 66.14 | 55.70 | 40.89 | 26.26 | 24.46 | 46.11 | |||||||||||||
YRS | 23 | 23 | 22 | 25 | 22 | 22 | 24 | 25 | 22 | 22 | 23 | 18 | 7 |