YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1956 | ----- | z | ----- | z | ----- | z | ----- | z | 56.13 | 62.48 | a | 68.48 | 64.12 | a | 60.53 | 46.84 | b | 28.64 | a | 17.72 | b | 50.62 | d | |||
1957 | 12.78 | d | 24.00 | b | 36.83 | h | 41.37 | 51.24 | b | 61.50 | 67.34 | 65.47 | b | 56.80 | c | 46.56 | 29.82 | 26.40 | a | 43.93 | a | |||||
1958 | 23.20 | a | 34.16 | 33.63 | 43.13 | 57.15 | 63.62 | 66.34 | 69.77 | a | 59.45 | 48.10 | a | 33.07 | 30.11 | d | 46.81 | |||||||||
1959 | 25.25 | a | 26.69 | a | 34.03 | 44.39 | b | 52.69 | 65.80 | 70.93 | d | 66.32 | a | 56.33 | 44.90 | 32.26 | a | 23.89 | 45.29 | |||||||
1960 | 13.23 | 15.27 | a | 39.89 | d | 46.88 | 53.08 | a | 63.88 | a | 71.61 | d | 66.87 | 60.97 | 46.76 | 33.72 | a | 22.71 | 44.57 | |||||||
1961 | 22.37 | a | 30.80 | 36.03 | 43.18 | 53.74 | 66.80 | 69.44 | 68.67 | b | 51.57 | 43.90 | 29.55 | 17.02 | 44.42 | |||||||||||
1962 | 11.50 | 24.36 | 26.10 | 49.41 | b | 53.44 | 61.98 | 66.85 | a | 65.27 | 58.73 | 48.79 | 37.28 | a | 23.98 | b | 43.97 | |||||||||
1963 | 14.14 | b | 34.27 | 34.50 | 40.75 | b | 56.65 | 59.90 | 70.44 | 67.40 | b | 62.66 | e | 53.09 | h | 38.50 | r | 22.31 | d | 46.30 | b | |||||
1964 | 20.78 | b | 24.52 | b | 29.17 | b | 42.59 | c | 54.74 | d | 57.83 | g | 70.28 | d | 65.11 | c | 56.93 | i | 49.48 | b | 26.77 | 18.63 | 40.21 | b | ||
1965 | 17.65 | 20.45 | 27.69 | 44.37 | 49.56 | 58.40 | 66.42 | 64.84 | 50.63 | 49.74 | 39.22 | 23.16 | 42.68 | |||||||||||||
1966 | 17.31 | 20.00 | 36.02 | 44.22 | 56.47 | b | 65.41 | n | 72.48 | i | 68.06 | n | 60.93 | i | 46.30 | i | 38.98 | j | 15.88 | g | 34.80 | g | ||||
1967 | 19.23 | c | 21.81 | b | 37.80 | f | 43.74 | e | 51.66 | 58.90 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.07 | g | |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | 53.09 | o | 62.24 | c | 68.32 | 61.69 | 54.95 | 46.50 | 32.02 | 19.00 | 49.25 | e | ||||||
1969 | 24.74 | 21.34 | 27.13 | 45.36 | a | 58.56 | 58.23 | 68.50 | 69.04 | d | 60.21 | a | 40.16 | 31.80 | 25.85 | 44.24 | ||||||||||
1970 | 18.81 | 32.96 | 33.34 | 37.43 | 54.02 | 61.43 | a | 68.08 | a | 69.16 | 54.18 | 42.05 | 34.45 | 22.77 | 44.06 | |||||||||||
1971 | 21.89 | 28.41 | 34.31 | 43.00 | 51.87 | a | 63.23 | 68.66 | 69.68 | 54.48 | 43.79 | c | 25.25 | 17.55 | 43.51 | |||||||||||
1972 | 23.90 | a | 30.60 | 41.84 | 45.88 | 54.92 | 63.31 | c | 68.40 | 66.76 | d | 56.98 | 47.39 | 30.08 | 13.22 | b | 45.28 | |||||||||
1973 | 6.24 | 12.52 | 30.37 | 40.62 | 53.12 | a | 61.38 | a | 66.77 | 66.71 | 55.23 | 47.73 | 30.73 | h | 20.90 | 41.96 | a | |||||||||
1974 | 8.79 | 16.00 | 40.18 | 42.12 | b | 55.84 | 65.35 | 69.02 | a | 66.61 | 59.45 | b | 49.44 | 34.83 | a | 21.72 | b | 44.11 | ||||||||
1975 | 20.08 | a | 22.79 | 34.53 | 39.53 | 50.61 | 58.52 | 69.87 | 64.92 | 59.14 | a | 46.34 | 30.67 | 21.44 | 43.20 | |||||||||||
1976 | 18.35 | 26.36 | 31.34 | 45.34 | a | 56.11 | 61.00 | 71.08 | 66.11 | 59.82 | 45.52 | 35.00 | 24.28 | a | 45.03 | |||||||||||
1977 | 21.55 | 30.79 | 33.34 | 49.42 | 52.08 | 68.15 | 69.79 | 67.90 | 60.38 | 48.60 | a | 33.80 | 27.77 | a | 46.96 | |||||||||||
1978 | 20.76 | 22.50 | 38.82 | 46.08 | 52.10 | 62.43 | 69.05 | 65.68 | 58.12 | 48.68 | a | 26.20 | 8.79 | 43.27 | ||||||||||||
1979 | 7.55 | 17.38 | 31.56 | 44.38 | 53.17 | b | 62.40 | 69.11 | 66.87 | 62.98 | 48.79 | 26.53 | a | 22.48 | 42.77 | |||||||||||
1980 | 20.76 | 24.28 | 33.95 | 44.80 | 51.98 | 62.57 | a | 69.58 | 65.74 | 58.80 | 45.63 | 34.25 | 32.00 | 45.36 | ||||||||||||
1981 | 29.03 | 31.46 | 37.55 | 49.08 | 52.25 | a | 65.48 | c | 69.20 | a | 67.95 | 61.65 | d | 44.39 | 35.30 | b | 27.42 | 47.56 | ||||||||
1982 | 18.24 | 24.24 | a | 35.37 | a | 41.05 | 52.31 | b | ----- | z | 67.41 | d | 69.50 | a | 59.81 | d | 44.02 | 30.93 | a | 22.31 | 42.29 | a | ||||
1983 | 23.23 | 27.43 | 37.47 | b | 39.40 | a | 50.18 | 60.95 | 68.85 | 70.90 | a | 61.38 | a | 48.72 | b | 31.00 | c | 17.28 | d | 44.73 | ||||||
1984 | 8.76 | b | 16.78 | 31.29 | 41.17 | d | ----- | z | 60.04 | f | 70.22 | k | 68.17 | a | 58.16 | b | 40.72 | d | 33.10 | f | 20.00 | b | 35.63 | d | ||
1985 | 13.43 | a | 14.80 | c | 33.47 | a | 49.83 | 56.60 | a | 63.83 | i | 72.10 | f | ----- | z | 52.94 | l | 44.30 | f | 31.43 | a | 17.48 | e | 31.01 | e | |
1986 | 21.69 | ----- | z | 42.95 | 44.75 | b | 53.20 | d | 66.53 | 68.65 | r | 69.17 | b | 54.25 | d | 45.60 | a | 34.29 | a | 24.17 | j | 48.05 | c | |||
1987 | 23.70 | f | 31.84 | f | 35.47 | a | 49.55 | a | 54.93 | c | 65.59 | c | 67.38 | k | 65.32 | 58.75 | f | 50.23 | 34.52 | c | 21.73 | g | 50.80 | e | ||
1988 | 14.25 | a | 22.89 | b | 33.61 | 46.94 | d | 54.39 | d | 67.36 | b | 71.55 | l | 69.46 | g | 56.10 | d | 54.06 | 34.57 | a | 19.50 | h | 42.69 | c | ||
1989 | 15.85 | 17.27 | 39.21 | e | 50.80 | g | 55.07 | h | 62.55 | b | 73.35 | g | 66.48 | d | 60.59 | h | 48.79 | c | 37.20 | b | 25.28 | b | 39.08 | d | ||
1990 | 26.29 | 24.25 | b | 40.29 | b | 51.71 | d | 54.38 | c | 67.29 | b | 70.70 | d | 69.13 | a | 64.57 | c | 48.53 | b | 33.88 | a | 15.83 | b | 47.24 | ||
1991 | 14.56 | 28.45 | 36.10 | b | 43.02 | c | 53.76 | d | 62.22 | a | 69.08 | a | 68.11 | c | 58.60 | e | 48.43 | c | 31.97 | a | 20.57 | a | 44.57 | |||
1992 | 18.07 | a | 30.29 | a | 41.22 | a | 51.76 | c | 58.09 | c | 63.07 | c | 66.00 | b | 67.00 | b | 59.50 | a | 50.45 | a | 29.17 | a | 18.52 | b | 46.09 | |
1993 | 18.52 | 20.11 | 35.95 | 44.17 | 55.62 | a | 59.78 | c | 64.53 | b | 65.18 | 57.55 | b | 48.25 | m | 28.02 | b | 24.55 | 43.09 | a | ||||||
1994 | 27.30 | a | 26.08 | c | 41.28 | a | 46.32 | 58.22 | a | 67.28 | a | 70.87 | a | 70.56 | 61.10 | a | 45.38 | b | 29.47 | a | ----- | z | 49.44 | a | ||
1995 | 25.69 | 36.06 | a | 39.85 | 43.57 | c | 49.52 | a | 58.85 | 66.98 | b | 68.79 | 60.15 | 46.21 | c | 38.03 | a | 29.50 | 46.93 | |||||||
1996 | 23.31 | 28.50 | a | 38.02 | c | 45.34 | b | 56.11 | 65.03 | a | 71.16 | 68.16 | 56.63 | 45.59 | b | 34.65 | 25.06 | 46.46 | ||||||||
1997 | 20.65 | 22.85 | a | 36.66 | b | 41.41 | b | 56.45 | 64.09 | a | 67.50 | 67.79 | 59.24 | a | 45.33 | a | 31.12 | 19.31 | 44.37 | |||||||
1998 | 28.29 | 30.86 | 36.67 | a | 43.48 | 54.47 | 58.55 | 71.83 | a | 69.08 | a | 62.90 | 46.47 | 36.17 | 20.42 | a | 46.60 | |||||||||
1999 | 26.59 | b | 31.13 | a | 41.62 | b | 42.60 | a | 52.70 | c | 61.93 | 70.30 | c | 67.35 | a | 56.43 | 48.90 | b | 38.59 | a | 25.42 | 46.96 | ||||
2000 | 29.39 | 32.09 | 38.94 | 50.10 | 58.23 | 64.80 | 73.40 | 71.87 | a | 59.95 | b | 47.84 | 27.10 | a | 25.62 | a | 48.28 | |||||||||
2001 | 22.92 | 29.13 | b | 41.61 | 46.40 | a | 57.92 | 66.84 | a | 71.94 | 69.73 | 62.07 | 49.17 | b | 37.24 | a | 18.18 | a | 47.76 | |||||||
2002 | ----- | z | 25.56 | a | 34.03 | 48.47 | 55.30 | c | 69.07 | b | 78.32 | 69.83 | j | 60.76 | a | 45.40 | 30.80 | 18.76 | 46.65 | b | ||||||
2003 | 21.63 | 25.69 | a | 40.55 | b | ----- | z | 56.73 | 64.60 | f | 75.02 | h | 71.30 | d | 58.48 | a | 53.45 | c | 28.93 | 24.37 | 42.35 | c | ||||
2004 | 15.70 | a | 22.43 | b | 43.10 | 46.78 | 55.19 | b | 62.75 | 69.06 | 65.95 | 58.07 | a | 47.15 | 32.10 | 24.73 | 45.25 | |||||||||
2005 | 26.19 | 28.98 | 38.03 | a | 44.79 | a | 54.92 | a | 59.22 | 71.48 | 66.05 | 58.19 | a | 48.65 | 34.52 | a | 23.65 | 46.22 | ||||||||
2006 | 24.45 | 28.16 | 34.23 | a | 47.07 | a | 56.45 | a | 66.57 | 72.25 | a | 66.20 | d | 55.21 | a | 44.91 | b | 34.58 | 20.85 | a | 45.91 | |||||
2007 | 10.17 | a | 28.73 | 41.60 | a | 47.02 | 56.29 | 66.87 | 74.08 | 71.02 | 59.48 | 45.43 | a | 35.97 | 13.98 | 45.89 | ||||||||||
2008 | 11.15 | 21.21 | 31.14 | b | 41.27 | 51.57 | a | 61.96 | b | 71.47 | 67.90 | 58.34 | a | 46.63 | a | 37.36 | a | 20.27 | a | 43.36 | ||||||
2009 | 20.29 | 29.82 | 37.31 | 44.16 | b | 56.52 | d | 58.17 | d | 70.39 | 66.36 | c | ----- | z | 43.12 | a | 34.52 | 10.82 | a | 42.86 | a | |||||
2010 | 16.16 | b | 18.43 | 35.22 | b | 44.87 | 49.12 | a | 63.38 | 69.85 | a | 65.90 | 60.32 | 48.39 | 31.48 | a | 26.35 | 44.12 | ||||||||
2011 | 12.92 | 17.07 | a | ----- | z | 41.64 | a | 48.33 | b | 61.00 | 68.95 | 69.37 | 61.63 | 45.85 | a | 31.97 | 20.27 | a | 43.55 | a | ||||||
2012 | 25.52 | 28.84 | 41.71 | 48.91 | c | 57.21 | 66.80 | 71.45 | 70.50 | a | 61.98 | a | 47.71 | 38.56 | d | 20.90 | 48.34 | |||||||||
2013 | 7.40 | 19.30 | 36.77 | a | 42.14 | a | 54.98 | 68.05 | 73.74 | 69.02 | 60.23 | 44.56 | 32.50 | 12.71 | 43.45 | |||||||||||
2014 | 21.71 | 31.38 | 38.98 | a | 45.47 | a | 52.79 | l | 63.69 | c | 72.26 | 65.29 | 60.50 | 49.77 | 33.22 | 27.90 | 46.38 | a | ||||||||
2015 | 26.29 | 34.93 | a | 43.35 | 46.20 | 51.90 | 67.87 | 66.73 | 67.50 | 62.08 | 52.66 | 31.78 | 18.00 | 47.44 | ||||||||||||
2016 | 16.85 | 27.41 | a | 38.76 | 46.60 | f | 53.27 | g | 68.53 | 69.53 | 66.50 | 58.57 | 49.63 | 38.68 | 23.10 | 45.76 | b | |||||||||
2017 | 16.84 | 30.70 | 42.77 | 44.32 | 53.77 | 65.98 | 71.79 | 68.32 | 58.40 | 45.15 | a | 39.65 | 27.79 | 47.12 | ||||||||||||
2018 | 27.56 | 29.73 | 37.29 | 46.45 | b | 57.52 | d | 67.67 | 73.17 | h | 69.14 | f | 63.50 | a | 45.64 | b | 31.60 | a | 23.11 | 43.01 | b | |||||
2019 | 18.16 | 19.20 | 33.18 | 47.47 | a | 50.52 | 61.10 | 70.86 | c | 69.47 | 60.47 | 38.87 | 35.37 | 23.87 | 44.04 | |||||||||||
2020 | 19.45 | 25.64 | 38.71 | 45.18 | 56.39 | 62.33 | d | 71.28 | d | 72.32 | 59.55 | 47.81 | 34.35 | 20.00 | 46.08 | |||||||||||
2021 | 19.89 | 27.41 | 37.66 | b | 44.40 | 55.87 | 68.61 | b | 74.10 | 68.85 | 61.60 | 46.37 | 38.84 | a | 26.53 | 47.51 | ||||||||||
2022 | 26.53 | 25.59 | 38.35 | 44.83 | 52.19 | 64.68 | 72.53 | 70.58 | 63.87 | 48.03 | 29.05 | 18.31 | 46.21 | |||||||||||||
2023 | 18.08 | 16.70 | 27.06 | 42.93 | 57.44 | 60.83 | 72.47 | 68.52 | 60.55 | a | 48.74 | 35.00 | 27.40 | 44.64 | ||||||||||||
2024 | 26.45 | 31.59 | 36.50 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.51 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.48 | 25.41 | 36.39 | 44.83 | 54.26 | 63.50 | 69.94 | 67.71 | 59.09 | 46.96 | 33.03 | 21.78 | 45.43 | |||||||||||||
S.D. | 5.84 | 5.63 | 4.22 | 3.03 | 2.56 | 3.08 | 2.42 | 2.10 | 2.84 | 2.82 | 3.52 | 4.67 | 1.58 | |||||||||||||
SKEW | -0.39 | -0.29 | -0.46 | 0.17 | -0.32 | 0.02 | 0.53 | -0.06 | -0.70 | -0.27 | -0.12 | -0.40 | 0.08 | |||||||||||||
MAX | 29.39 | 36.06 | 43.35 | 51.76 | 58.56 | 69.07 | 78.32 | 72.32 | 64.57 | 54.06 | 39.65 | 32.00 | 48.34 | |||||||||||||
MIN | 6.24 | 12.52 | 26.10 | 37.43 | 48.33 | 58.17 | 64.53 | 61.69 | 50.63 | 38.87 | 25.25 | 8.79 | 42.68 | |||||||||||||
YRS | 65 | 65 | 64 | 63 | 63 | 62 | 58 | 62 | 61 | 63 | 63 | 62 | 44 |