YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 6.68 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 6.68 | k | |
1969 | ----- | z | ----- | z | ----- | z | 37.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.23 | ----- | z | ----- | z | 36.55 | j | ||
1970 | -6.06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.16 | j | ||
1971 | ----- | z | 8.71 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 10.29 | 9.50 | j | ||
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.60 | 59.00 | ----- | z | ----- | z | ----- | z | 24.93 | a | 0.04 | h | 46.18 | i | ||
1973 | ----- | z | ----- | z | ----- | z | 32.03 | ----- | z | 55.83 | g | 59.61 | h | ----- | z | ----- | z | 40.27 | e | ----- | z | ----- | z | 36.15 | j | |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.20 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | 11.14 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.67 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.47 | a | 3.47 | k |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | 45.68 | i | ----- | z | 57.92 | f | ----- | z | ----- | z | ----- | z | 11.06 | n | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | 38.87 | ----- | z | ----- | z | ----- | z | 46.27 | ----- | z | ----- | z | ----- | z | 42.57 | j | ||
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.87 | g | ----- | z | 58.29 | ----- | z | ----- | z | ----- | z | ----- | z | 58.29 | k | |
1981 | ----- | z | ----- | z | 21.33 | a | 35.34 | a | 42.35 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.34 | j |
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 | 9.67 | g | ----- | z |
1993 | 1.50 | g | 7.81 | b | 19.31 | b | 33.90 | 46.94 | 56.50 | 61.61 | 59.76 | b | 45.33 | 34.90 | 22.13 | 13.97 | 36.56 | a | ||||||||
1994 | -5.19 | 2.41 | a | 25.35 | 33.00 | 48.23 | 59.97 | 57.94 | 55.13 | 53.60 | 42.00 | a | 28.29 | b | 18.00 | 34.89 | ||||||||||
1995 | 9.93 | a | 10.74 | a | 23.96 | h | 30.80 | 45.77 | 59.90 | 61.74 | 64.33 | a | 46.50 | 36.74 | 18.43 | 13.10 | a | 36.18 | a | |||||||
1996 | -2.00 | a | 9.89 | k | 17.07 | b | 30.53 | k | 46.26 | 59.17 | 57.70 | a | 57.10 | 48.67 | ----- | z | 15.30 | g | 6.37 | a | 36.29 | d | ||||
1997 | -2.52 | j | 9.41 | f | 21.56 | f | 30.62 | f | 39.50 | a | 57.93 | a | 61.61 | 57.74 | 50.31 | a | 36.77 | a | 19.93 | a | 19.03 | a | 42.85 | d | ||
1998 | 9.07 | d | 22.52 | a | 20.62 | b | 36.47 | 52.16 | 55.76 | a | 61.39 | 60.03 | a | 51.28 | a | 38.77 | 27.62 | a | 12.28 | b | 37.33 | |||||
1999 | 0.87 | a | 17.86 | 22.06 | 36.79 | a | 48.68 | 56.40 | 63.03 | 57.97 | a | 45.03 | 32.57 | c | 27.64 | b | 10.59 | b | 34.96 | |||||||
2000 | 3.30 | d | 16.08 | c | 28.07 | d | 32.47 | 47.55 | b | 54.03 | a | 59.63 | a | 59.80 | a | 45.37 | c | 39.93 | b | 20.72 | a | -5.50 | c | 33.45 | ||
2001 | 4.66 | b | -2.85 | a | 12.52 | b | 34.56 | c | 46.47 | a | 55.52 | a | 61.81 | ----- | z | 46.90 | a | 33.46 | c | 32.31 | d | 17.31 | b | 31.15 | a | |
2002 | 14.45 | b | 18.15 | b | 17.68 | c | 34.13 | 42.30 | a | 59.48 | a | 65.83 | b | 60.43 | a | 52.42 | d | 32.91 | i | 22.63 | c | 17.17 | h | 38.75 | b | |
2003 | 4.52 | h | 5.58 | d | 21.48 | h | 36.43 | 46.62 | b | 56.10 | 62.46 | c | 61.30 | a | 48.29 | b | 37.76 | b | 22.97 | 16.58 | 39.41 | b | ||||
2004 | 2.93 | b | 9.64 | a | 28.03 | b | 34.14 | a | 47.10 | b | 55.30 | 60.38 | b | 55.07 | a | 55.28 | a | 39.61 | 28.63 | 14.60 | a | 35.89 | ||||
2005 | 5.73 | a | 18.33 | a | 20.40 | a | 40.74 | c | 46.48 | b | 62.27 | 64.10 | a | 58.97 | a | 54.43 | b | 41.21 | b | 27.31 | a | 7.45 | 37.29 | |||
2006 | 20.37 | a | 8.78 | a | 24.48 | 41.00 | 50.03 | a | 58.57 | 64.42 | 61.87 | a | 48.40 | 34.87 | a | 25.21 | a | 20.53 | a | 38.21 | ||||||
2007 | 8.93 | a | 0.92 | b | 28.23 | a | 35.14 | a | 51.45 | 59.47 | 61.35 | 62.87 | a | 52.33 | 44.48 | 23.80 | 7.07 | b | 36.34 | |||||||
2008 | 2.16 | 5.07 | 16.58 | 32.73 | 43.93 | b | 56.20 | 62.45 | 58.57 | a | 51.77 | 38.20 | a | 25.70 | 3.06 | 33.04 | ||||||||||
2009 | -4.37 | a | 11.71 | 23.16 | 33.13 | 46.26 | 55.57 | 56.94 | 57.19 | 53.77 | 35.06 | 31.50 | 7.10 | 33.92 | ||||||||||||
2010 | -0.81 | 1.61 | 27.26 | 41.33 | 47.81 | 58.87 | 64.39 | 65.03 | 49.70 | 39.00 | 24.40 | 6.23 | 35.40 | |||||||||||||
2011 | -1.10 | 7.64 | 20.23 | 35.73 | 47.52 | 60.23 | 68.10 | 60.26 | 49.03 | 39.68 | 25.77 | 17.10 | 35.85 | |||||||||||||
2012 | 13.71 | 18.00 | 37.55 | 37.80 | 52.94 | 60.83 | 67.23 | 58.61 | 46.93 | 35.13 | 26.17 | 13.35 | 39.02 | |||||||||||||
2013 | 6.00 | 9.61 | 16.39 | 30.47 | 48.00 | 59.80 | 62.35 | 61.10 | 54.20 | 37.97 | 20.83 | a | 3.97 | 34.22 | ||||||||||||
2014 | -5.35 | -3.04 | 15.42 | 33.43 | 47.39 | 60.73 | 58.13 | 61.55 | 51.70 | 36.61 | 14.93 | 17.52 | 32.42 | |||||||||||||
2015 | 7.55 | 0.43 | 21.29 | 36.27 | 48.45 | 58.73 | 60.97 | 58.26 | 57.50 | 39.61 | 30.83 | 21.37 | d | 36.77 | ||||||||||||
2016 | 6.90 | 16.52 | 30.81 | 37.43 | 48.55 | 59.47 | 62.94 | 61.68 | 55.57 | 40.77 | 33.60 | 9.71 | 38.66 | |||||||||||||
2017 | 13.58 | 18.86 | 22.68 | 37.27 | 46.61 | 57.83 | 62.42 | 58.06 | 54.63 | 40.52 | 22.40 | 8.65 | 36.96 | |||||||||||||
2018 | 2.58 | 2.44 | a | 21.71 | 22.37 | 55.32 | 64.00 | 61.48 | 61.94 | 55.33 | 34.16 | 17.60 | 17.23 | 34.68 | ||||||||||||
2019 | 3.74 | -1.07 | 16.81 | 36.13 | 46.27 | a | 59.10 | a | 64.13 | 57.71 | 56.87 | 35.10 | 19.90 | 14.03 | 34.06 | |||||||||||
2020 | 11.19 | 5.83 | 28.13 | 31.27 | 47.03 | 61.67 | 63.29 | 60.48 | 49.97 | 31.90 | 27.00 | 15.32 | 36.09 | |||||||||||||
2021 | 12.94 | 0.86 | 29.61 | 34.93 | 47.45 | 60.27 | 60.97 | 61.06 | 52.87 | 43.55 | 25.17 | 15.19 | 37.07 | |||||||||||||
2022 | -3.39 | 0.61 | 22.84 | 30.87 | 49.29 | 60.07 | 63.10 | 60.81 | 51.83 | 35.84 | 24.87 | 9.16 | 33.82 | |||||||||||||
2023 | 10.71 | 8.00 | 18.68 | 35.27 | 50.84 | 61.07 | 58.68 | 61.39 | 56.03 | 41.61 | 25.03 | 24.39 | 37.64 | |||||||||||||
2024 | 12.32 | 20.79 | 23.40 | a | 36.70 | 46.00 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.30 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 5.23 | 8.66 | 22.59 | 34.79 | 47.44 | 58.61 | 61.88 | 59.82 | 51.19 | 37.85 | 24.78 | 12.14 | 35.75 | |||||||||||||
S.D. | 6.79 | 7.55 | 5.44 | 3.58 | 3.33 | 2.41 | 2.59 | 2.34 | 3.68 | 3.20 | 4.34 | 6.37 | 1.83 | |||||||||||||
SKEW | 0.06 | 0.22 | 0.57 | -0.94 | -0.38 | -0.08 | 0.24 | 0.04 | -0.12 | 0.09 | -0.07 | -0.48 | 0.01 | |||||||||||||
MAX | 20.37 | 22.52 | 37.55 | 41.33 | 55.32 | 64.00 | 68.10 | 65.03 | 57.50 | 44.48 | 33.60 | 24.39 | 39.02 | |||||||||||||
MIN | -6.06 | -3.04 | 12.52 | 22.37 | 38.87 | 54.03 | 56.94 | 55.07 | 45.03 | 31.90 | 14.93 | -5.50 | 32.42 | |||||||||||||
YRS | 31 | 31 | 30 | 33 | 32 | 32 | 33 | 31 | 32 | 31 | 31 | 32 | 24 |