YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 82.07 | a | 69.40 | 57.13 | a | 39.47 | 14.23 | 52.46 | g | |||
1984 | 20.00 | d | 35.75 | a | 35.45 | b | 57.24 | a | 65.47 | a | 76.93 | 79.84 | 79.81 | 66.72 | a | 58.07 | b | 39.44 | c | 27.83 | g | 55.88 | a | |||
1985 | 21.78 | d | 24.41 | a | 42.94 | 59.97 | a | 71.52 | 73.50 | f | 79.45 | 74.23 | 67.32 | b | 56.71 | 32.56 | c | 15.86 | b | 49.70 | a | |||||
1986 | 26.75 | c | 25.46 | b | 42.41 | b | 58.62 | a | 70.94 | 77.00 | 80.03 | 73.71 | 66.63 | 55.20 | a | 35.15 | c | 30.54 | c | 53.54 | ||||||
1987 | 27.72 | b | 37.79 | 46.30 | a | 63.79 | a | 72.70 | a | 79.93 | ----- | z | 76.23 | 70.76 | a | 49.83 | a | 42.86 | b | 30.17 | b | 54.37 | a | |||
1988 | 21.17 | b | 24.27 | c | 39.66 | b | 58.69 | a | 76.61 | 81.80 | 88.13 | 81.77 | a | 70.34 | a | 50.79 | b | 38.96 | d | 27.89 | c | 55.01 | ||||
1989 | 29.39 | c | 20.36 | c | 34.96 | c | 53.41 | c | 70.43 | a | 75.93 | 82.90 | 78.71 | 71.10 | a | 60.43 | c | 36.73 | 15.80 | a | 52.51 | |||||
1990 | 33.00 | 30.21 | 44.61 | 56.20 | 65.32 | 76.97 | 79.74 | 78.81 | 70.37 | 56.48 | 44.55 | a | 27.37 | a | 55.30 | |||||||||||
1991 | 20.50 | a | 32.25 | 42.30 | a | 59.07 | a | 70.00 | 79.77 | 78.19 | 80.55 | 65.14 | a | 55.36 | c | 32.97 | a | 28.53 | a | 53.72 | ||||||
1992 | 26.77 | a | 32.61 | a | 39.32 | 48.93 | a | 70.03 | a | 73.23 | 73.10 | 74.48 | 66.30 | 55.84 | 35.33 | 26.74 | 51.89 | |||||||||
1993 | 22.74 | 27.43 | 41.00 | 49.47 | 65.35 | 70.70 | 76.97 | 78.65 | 63.80 | 53.35 | 35.90 | 26.48 | 50.99 | |||||||||||||
1994 | 12.81 | 21.46 | 39.62 | b | 53.40 | 69.68 | 78.35 | d | 77.24 | f | 75.89 | c | 71.60 | e | 59.31 | e | 45.62 | f | 31.60 | f | 53.57 | c | ||||
1995 | 24.12 | f | 26.83 | d | 40.74 | d | 45.27 | h | 66.59 | i | 81.15 | j | 79.74 | l | 81.22 | h | 68.65 | j | 58.41 | i | 30.50 | j | 24.11 | l | 33.79 | j |
1996 | 20.04 | h | 25.80 | i | 31.62 | j | 50.62 | i | 65.05 | j | 74.39 | l | 77.23 | i | 79.86 | i | 70.53 | k | 56.87 | h | 33.45 | j | 23.80 | k | ----- | z |
1997 | 21.32 | i | 31.35 | h | 38.45 | k | 53.36 | h | 59.67 | j | 79.10 | i | 79.05 | i | 75.00 | j | 70.81 | i | 55.70 | h | 33.82 | m | 35.14 | j | ----- | z |
1998 | 27.52 | j | 40.50 | h | 38.82 | i | 61.48 | i | 78.30 | k | 73.86 | h | 83.09 | i | 82.14 | j | 76.45 | h | 58.24 | j | 42.37 | k | 35.52 | j | ----- | z |
1999 | 19.90 | k | 36.50 | h | 42.74 | h | 60.62 | i | 69.40 | k | 76.05 | h | 83.18 | i | 77.27 | i | 70.05 | i | 58.24 | j | 51.10 | j | 32.60 | k | ----- | z |
2000 | 24.10 | j | 35.14 | h | 48.41 | i | 54.00 | l | 69.68 | i | 74.18 | h | 79.25 | k | 79.96 | h | 70.55 | j | 63.77 | i | 40.55 | j | 17.05 | l | ----- | z |
2001 | 29.36 | i | 25.53 | i | 39.65 | k | 55.85 | j | 69.23 | i | 76.00 | j | 83.25 | k | 82.91 | h | 72.32 | k | 58.22 | h | 51.20 | j | 36.65 | k | ----- | z |
2002 | 31.32 | i | 36.00 | h | 33.80 | k | 53.09 | h | 62.48 | j | 77.00 | l | 84.10 | k | 79.09 | i | 72.45 | j | 50.59 | i | 39.33 | l | 33.11 | l | ----- | z |
2003 | 22.10 | j | 24.40 | h | 42.25 | k | 56.48 | i | 67.62 | j | 77.21 | k | 80.67 | j | 85.43 | j | 73.48 | i | 58.30 | h | 40.72 | l | 33.00 | j | ----- | z |
2004 | 19.33 | j | 29.79 | j | 42.05 | i | 57.24 | i | 66.63 | l | 74.50 | h | 81.24 | j | 74.52 | j | 76.81 | i | 59.35 | k | 47.53 | k | 30.79 | l | ----- | z |
2005 | 24.95 | j | 33.05 | h | 39.45 | i | 62.74 | k | 63.95 | k | 82.18 | h | 84.15 | k | 81.52 | h | 75.95 | i | 62.67 | j | 48.00 | m | 25.00 | p | ----- | z |
2006 | 32.40 | k | 30.75 | h | 42.05 | i | 64.79 | k | 68.16 | 78.37 | 85.23 | 79.39 | 67.50 | 53.26 | 44.37 | 32.81 | 63.63 | d | ||||||||
2007 | 26.45 | 20.11 | a | 44.26 | 54.47 | 70.71 | 78.80 | 80.45 | 78.81 | 70.87 | 61.32 | 40.33 | 23.19 | 54.15 | ||||||||||||
2008 | 21.03 | a | 20.79 | 34.74 | 51.33 | 62.60 | a | 72.90 | 78.84 | 78.55 | 69.97 | 55.81 | 39.86 | a | 20.87 | 50.61 | ||||||||||
2009 | 15.10 | b | 27.96 | 38.90 | 52.93 | 65.55 | 72.20 | 73.48 | 74.45 | 72.70 | 48.23 | 48.67 | 24.48 | 51.22 | ||||||||||||
2010 | 23.00 | a | 30.07 | 49.35 | 62.37 | 68.94 | 73.47 | 80.65 | 81.16 | 66.93 | a | 61.39 | 42.03 | 24.39 | 55.31 | |||||||||||
2011 | 18.13 | 26.57 | 37.23 | 51.30 | 65.19 | 75.17 | 83.16 | 76.97 | 66.77 | 59.77 | 43.50 | 31.13 | 52.91 | |||||||||||||
2012 | 26.48 | 33.21 | 52.77 | 56.67 | 70.58 | 76.93 | 84.13 | 78.61 | 70.10 | 52.77 | 41.33 | 29.29 | 56.07 | |||||||||||||
2013 | 20.77 | 25.07 | 32.03 | a | 43.20 | 63.45 | 72.77 | 78.48 | 77.77 | 71.93 | 54.84 | 36.83 | 17.52 | 49.56 | ||||||||||||
2014 | 13.00 | 16.07 | 29.29 | 48.70 | 66.13 | 75.07 | 75.10 | a | 76.23 | 67.50 | 54.68 | 30.20 | 28.19 | 48.35 | ||||||||||||
2015 | 20.77 | 15.14 | 40.84 | 55.27 | 66.94 | 74.30 | 78.61 | 74.48 | 74.13 | 58.58 | 46.67 | 35.00 | 53.39 | |||||||||||||
2016 | 21.26 | 29.48 | 44.55 | 52.13 | 68.43 | a | 76.28 | a | 79.35 | 78.48 | 70.97 | 59.87 | 50.57 | 24.74 | 54.68 | |||||||||||
2017 | 24.61 | 35.25 | 37.68 | 55.23 | 62.77 | 75.13 | 79.19 | 73.35 | 72.63 | 58.48 | 36.13 | 21.58 | 52.67 | |||||||||||||
2018 | 23.06 | 23.43 | 39.42 | 42.17 | 75.32 | 77.60 | 79.61 | 77.58 | 70.50 | 50.16 | 32.47 | 29.87 | 51.77 | |||||||||||||
2019 | 20.42 | 21.57 | 35.00 | 50.47 | 61.48 | 75.47 | 80.48 | 76.06 | 69.63 | 51.65 | 32.40 | 28.23 | 50.24 | |||||||||||||
2020 | 27.42 | 29.38 | 41.16 | 51.03 | 66.16 | 79.73 | 84.68 | 80.52 | 67.80 | 49.55 | 48.37 | 31.42 | 54.77 | |||||||||||||
2021 | 27.87 | 21.46 | 48.87 | 55.50 | 66.71 | 82.33 | 81.48 | 78.19 | 72.31 | a | 63.39 | 41.50 | 30.45 | 55.84 | ||||||||||||
2022 | 17.94 | 22.71 | 36.52 | 45.90 | 67.32 | 75.60 | 79.32 | 76.58 | 70.50 | 57.52 | 42.13 | 24.48 | 51.38 | |||||||||||||
2023 | 26.32 | 28.54 | 36.68 | 50.38 | a | 69.00 | 80.03 | 78.87 | 78.03 | 71.87 | 57.26 | 41.80 | 37.68 | 54.70 | ||||||||||||
2024 | 24.77 | 40.38 | 44.19 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.45 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.80 | 26.87 | 40.43 | 53.49 | 68.05 | 76.53 | 79.98 | 77.67 | 69.47 | 55.90 | 39.76 | 26.39 | 52.94 | |||||||||||||
S.D. | 4.76 | 6.17 | 5.19 | 5.24 | 3.63 | 2.94 | 3.34 | 2.41 | 2.53 | 3.91 | 5.31 | 5.78 | 2.12 | |||||||||||||
SKEW | -0.24 | 0.22 | 0.23 | -0.19 | 0.34 | 0.08 | 0.17 | -0.08 | -0.35 | -0.20 | 0.14 | -0.46 | -0.36 | |||||||||||||
MAX | 33.00 | 40.38 | 52.77 | 63.79 | 76.61 | 82.33 | 88.13 | 82.07 | 74.13 | 63.39 | 50.57 | 37.68 | 56.07 | |||||||||||||
MIN | 12.81 | 15.14 | 29.29 | 42.17 | 61.48 | 70.70 | 73.10 | 73.35 | 63.80 | 48.23 | 30.20 | 14.23 | 48.35 | |||||||||||||
YRS | 29 | 30 | 30 | 28 | 29 | 28 | 27 | 30 | 30 | 30 | 29 | 28 | 24 |