YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | ----- | 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 | 53.44 | o | 31.54 | f | 27.68 | f | ----- | z |
1987 | 24.16 | f | 35.45 | f | 41.35 | e | 62.88 | d | 68.21 | g | 78.56 | e | 78.88 | e | 74.75 | g | 67.58 | f | 48.46 | g | 39.85 | d | 28.28 | f | 60.30 | g |
1988 | 14.52 | f | 20.88 | e | 34.54 | g | 57.22 | u | 74.68 | f | 82.80 | j | 86.04 | h | 74.96 | h | 65.58 | d | 49.38 | j | 35.50 | h | 22.32 | f | 43.23 | j |
1989 | 25.83 | g | 16.95 | g | 30.60 | f | 46.77 | h | 68.21 | g | 74.19 | i | 80.19 | d | 76.45 | 68.33 | 58.97 | 30.55 | a | 12.63 | a | 54.52 | f | |||
1990 | 28.23 | 29.00 | b | 39.48 | 53.62 | a | 63.71 | 75.47 | 77.74 | 78.71 | 69.21 | a | 53.03 | 40.60 | 21.28 | b | 52.51 | |||||||||
1991 | 16.26 | 31.18 | 38.26 | 57.17 | 68.42 | 75.64 | b | 76.03 | a | 81.52 | b | 63.96 | b | 49.55 | 29.00 | a | 25.50 | a | 51.04 | |||||||
1992 | 23.68 | 29.25 | a | 37.23 | a | 45.40 | 70.29 | 70.52 | a | 71.69 | b | 72.23 | 66.74 | g | 52.48 | 31.62 | d | 23.00 | i | 50.44 | b | |||||
1993 | 22.08 | f | 24.45 | f | 39.38 | g | 48.44 | e | 62.70 | h | 68.96 | g | 74.45 | i | 76.38 | g | 60.76 | e | 50.14 | j | 30.83 | 21.17 | a | 40.30 | h | |
1994 | 6.90 | a | 17.04 | 37.71 | 49.30 | 64.74 | 73.20 | 73.77 | a | 71.97 | 66.60 | 54.45 | 39.37 | 29.10 | 48.68 | |||||||||||
1995 | 19.77 | 21.25 | 36.45 | 42.53 | 62.53 | a | 79.50 | 75.97 | 76.32 | 64.37 | 50.26 | 25.90 | 18.77 | 47.80 | ||||||||||||
1996 | 12.63 | a | 20.41 | 29.23 | 43.77 | 59.61 | 72.50 | 72.71 | 76.94 | 65.80 | 51.74 | 27.50 | 19.32 | 46.01 | ||||||||||||
1997 | 14.03 | 26.43 | 34.00 | 48.27 | 56.06 | 76.13 | 74.84 | 71.29 | 68.67 | 51.26 | 31.67 | 30.23 | 48.57 | |||||||||||||
1998 | 22.19 | 36.50 | 34.52 | 54.27 | 69.23 | 67.40 | 76.65 | 77.74 | 70.47 | 53.53 | a | 37.23 | 26.13 | 52.15 | ||||||||||||
1999 | 15.11 | c | 32.22 | a | 37.71 | 50.67 | 65.37 | a | 71.76 | a | 78.29 | 72.61 | 64.60 | 50.32 | 44.43 | 27.46 | c | 50.88 | ||||||||
2000 | 19.90 | 30.93 | a | 44.33 | a | 48.17 | 65.42 | 67.67 | 74.52 | 74.58 | 64.30 | 56.81 | 34.90 | a | 11.93 | a | 49.45 | |||||||||
2001 | 26.00 | a | 18.04 | a | 34.65 | 48.47 | 63.84 | 73.07 | 77.39 | 78.52 | 65.27 | 52.10 | 46.50 | 27.77 | 50.97 | |||||||||||
2002 | 24.37 | a | 29.75 | 27.61 | 46.03 | 57.68 | 73.40 | 80.61 | 73.16 | 67.93 | 42.87 | 32.50 | 26.94 | 48.57 | ||||||||||||
2003 | 15.58 | 18.46 | 31.50 | e | 48.66 | a | 61.47 | n | ----- | z | 77.42 | 78.61 | 67.27 | 52.87 | 32.30 | 28.23 | 45.09 | b | ||||||||
2004 | 11.32 | 27.24 | 36.61 | 48.70 | 56.71 | 68.17 | 75.53 | a | 69.03 | 68.70 | 53.48 | ----- | z | 21.61 | 48.83 | a | ||||||||||
2005 | 15.35 | 28.43 | 34.90 | b | 54.73 | 57.81 | 73.50 | 78.32 | 75.39 | 69.93 | 54.06 | 37.00 | 21.53 | a | 50.08 | |||||||||||
2006 | 29.35 | 21.14 | 37.19 | 56.27 | 62.90 | 73.27 | 82.62 | b | ----- | z | 60.11 | k | 48.48 | 37.57 | 28.35 | 47.72 | b | |||||||||
2007 | 21.16 | 15.14 | 38.84 | 48.83 | 65.23 | 76.07 | 77.94 | 76.03 | 65.00 | c | 55.13 | 34.53 | 19.45 | 49.45 | ||||||||||||
2008 | 18.16 | 20.24 | 31.16 | 45.50 | 58.77 | 69.80 | 74.81 | 75.52 | 64.43 | 50.06 | 32.77 | 14.26 | 46.29 | |||||||||||||
2009 | 12.15 | d | 23.21 | 33.26 | 48.33 | 63.68 | 70.30 | 71.39 | 71.77 | 70.60 | 42.32 | 42.00 | 16.55 | 47.13 | ||||||||||||
2010 | 17.06 | 26.21 | 48.03 | 58.33 | 66.26 | 69.93 | 79.00 | 77.58 | 59.53 | 54.71 | 36.40 | 18.23 | 50.94 | |||||||||||||
2011 | 12.16 | 23.68 | 32.16 | 46.83 | 62.55 | 68.90 | 81.03 | 76.19 | 65.87 | 55.58 | 37.63 | 26.87 | 49.12 | |||||||||||||
2012 | 23.68 | 28.72 | 49.00 | 51.63 | 65.74 | 75.33 | 82.29 | 76.81 | 66.97 | 47.94 | 34.53 | 22.68 | 52.11 | |||||||||||||
2013 | 17.74 | 20.93 | 30.48 | 40.07 | 60.71 | 71.47 | 76.45 | 76.74 | 67.67 | 49.32 | 32.27 | 10.87 | 46.23 | |||||||||||||
2014 | 9.06 | 12.07 | 27.42 | 42.30 | 63.00 | 72.20 | 76.13 | 72.39 | 65.17 | 50.13 | 26.03 | 23.65 | 44.96 | |||||||||||||
2015 | 16.48 | 11.46 | 39.29 | 52.50 | 63.00 | 72.47 | 78.77 | 74.48 | 70.43 | 53.29 | 42.07 | 29.45 | 50.31 | |||||||||||||
2016 | 18.81 | 24.48 | 40.06 | 47.53 | 68.00 | c | 70.93 | 77.13 | 76.16 | 66.80 | 54.06 | 45.50 | 20.00 | 50.79 | ||||||||||||
2017 | 21.58 | 29.32 | 34.23 | 52.17 | 59.77 | 73.20 | 76.65 | 70.19 | 68.13 | 53.26 | 30.90 | 16.19 | 48.80 | |||||||||||||
2018 | 18.23 | 18.54 | 34.94 | 42.87 | 72.19 | 73.53 | 78.58 | 76.06 | 64.60 | 44.26 | 26.27 | 25.39 | 47.95 | |||||||||||||
2019 | 12.71 | 16.57 | 33.87 | 48.03 | 58.65 | 71.90 | 79.68 | 73.29 | 64.47 | 47.23 | 28.20 | 23.32 | 46.49 | |||||||||||||
2020 | 21.65 | 25.21 | 38.10 | 46.43 | 63.03 | 74.73 | 79.29 | 74.94 | 63.33 | 42.87 | 39.47 | 24.77 | 49.48 | |||||||||||||
2021 | 23.74 | 15.61 | 41.74 | 50.30 | 65.55 | 78.30 | 79.97 | 76.94 | 68.77 | 57.42 | 35.43 | 23.48 | 51.44 | |||||||||||||
2022 | 10.77 | 13.86 | 30.61 | 38.13 | 62.90 | 71.67 | 75.19 | 73.87 | 66.17 | 52.61 | 35.63 | 17.39 | 45.73 | |||||||||||||
2023 | 21.87 | 23.21 | 31.61 | 44.47 | 65.90 | 76.67 | 74.26 | 74.29 | 68.83 | 51.39 | 36.00 | 33.26 | 50.15 | |||||||||||||
2024 | 19.45 | 34.17 | 36.29 | 49.67 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.97 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.15 | 23.45 | 36.11 | 48.90 | 63.41 | 72.94 | 77.19 | 75.10 | 66.43 | 51.41 | 35.00 | 22.46 | 49.11 | |||||||||||||
S.D. | 5.45 | 6.44 | 5.04 | 5.25 | 3.96 | 3.07 | 2.75 | 2.73 | 2.63 | 4.06 | 5.51 | 5.62 | 2.11 | |||||||||||||
SKEW | 0.02 | -0.00 | 0.59 | 0.42 | 0.06 | 0.20 | -0.14 | -0.13 | -0.46 | -0.67 | 0.23 | -0.29 | -0.29 | |||||||||||||
MAX | 29.35 | 36.50 | 49.00 | 62.88 | 72.19 | 79.50 | 82.62 | 81.52 | 70.60 | 58.97 | 46.50 | 33.26 | 52.51 | |||||||||||||
MIN | 6.90 | 11.46 | 27.42 | 38.13 | 56.06 | 67.40 | 71.39 | 69.03 | 59.53 | 42.32 | 25.90 | 10.87 | 44.96 | |||||||||||||
YRS | 34 | 35 | 35 | 35 | 32 | 33 | 35 | 33 | 34 | 34 | 35 | 34 | 29 |