YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1968 | ----- | z | ----- | z | ----- | z | 40.57 | 47.87 | 57.92 | 62.63 | 61.56 | 55.92 | 46.81 | 29.42 | 17.10 | 46.64 | c | |||||||||
1969 | 14.44 | 15.39 | 17.90 | 39.98 | 50.12 | a | 51.57 | 61.56 | 64.13 | 53.93 | 39.89 | 29.33 | 18.42 | 38.06 | ||||||||||||
1970 | 8.06 | 10.61 | 18.50 | 38.27 | 47.53 | 60.67 | a | 65.39 | 62.48 | 55.08 | 46.71 | 29.42 | 17.19 | 38.33 | ||||||||||||
1971 | 7.52 | 13.73 | 19.71 | 36.88 | 46.74 | 62.57 | 59.61 | 59.13 | 56.00 | 50.29 | 29.18 | 18.03 | 38.28 | |||||||||||||
1972 | 7.27 | 8.76 | 17.85 | 32.65 | 54.50 | 56.87 | 61.56 | 61.11 | 51.60 | 40.11 | 28.32 | 12.39 | 36.08 | |||||||||||||
1973 | 16.58 | 14.82 | 33.13 | 37.30 | 46.45 | 61.02 | 63.94 | 64.60 | 52.88 | 49.26 | 29.55 | 15.68 | 40.43 | |||||||||||||
1974 | 10.42 | 9.75 | 21.76 | 38.08 | 47.34 | 56.17 | 66.48 | 60.89 | 48.30 | 43.69 | 31.10 | 22.89 | 38.07 | |||||||||||||
1975 | 13.73 | 17.04 | 21.63 | 30.86 | a | 56.24 | 61.28 | 66.44 | 62.42 | a | 50.23 | 46.66 | 32.90 | 15.27 | a | 39.56 | ||||||||||
1976 | 9.55 | 21.12 | 23.52 | 40.15 | 48.74 | 63.65 | 63.55 | 63.92 | 53.20 | 37.71 | 22.55 | a | 7.87 | 37.96 | ||||||||||||
1977 | 1.47 | 14.59 | 31.60 | a | 42.85 | 60.82 | 57.68 | 66.18 | 56.74 | 53.35 | c | 43.73 | 30.05 | 16.00 | 39.59 | |||||||||||
1978 | 11.23 | 10.46 | 21.39 | 35.30 | 53.79 | 58.47 | 62.82 | 62.63 | 57.62 | 43.50 | a | 28.58 | 12.74 | 38.21 | ||||||||||||
1979 | 4.29 | 6.50 | 24.87 | a | 34.05 | 46.47 | 57.98 | 63.90 | 60.77 | 55.10 | 39.58 | 27.48 | 20.92 | 36.83 | ||||||||||||
1980 | 11.45 | 10.62 | 21.03 | 38.80 | 55.13 | 57.03 | 64.79 | 63.89 | 51.50 | c | 38.50 | 29.10 | 14.26 | 38.01 | ||||||||||||
1981 | 12.15 | 19.00 | 26.95 | 40.03 | 48.06 | 59.93 | 63.97 | 63.76 | 51.72 | 40.39 | 34.07 | 18.21 | 39.85 | |||||||||||||
1982 | 3.03 | 11.27 | 22.45 | 32.70 | 56.31 | 53.58 | 64.79 | b | 58.97 | a | 53.75 | b | 45.47 | 28.97 | a | 22.02 | 37.78 | |||||||||
1983 | 17.13 | 22.38 | 26.94 | 34.15 | 46.26 | 60.80 | 69.42 | a | 67.00 | 56.55 | 43.92 | 30.68 | 6.84 | b | 40.17 | |||||||||||
1984 | 8.79 | 24.57 | b | 17.38 | b | 41.97 | 48.39 | 61.90 | 61.63 | 64.40 | 50.32 | 45.87 | 31.02 | 16.86 | c | 39.42 | ||||||||||
1985 | 9.08 | a | 11.75 | 28.87 | 42.61 | b | 53.53 | b | 56.57 | 62.45 | 61.25 | a | 54.52 | 45.26 | 24.28 | a | 8.60 | 38.23 | ||||||||
1986 | 13.74 | 14.62 | 27.65 | a | 43.08 | 55.40 | 58.43 | a | 66.23 | 59.62 | a | 54.67 | 43.53 | b | 25.40 | a | 21.66 | b | 40.34 | |||||||
1987 | 18.10 | 25.15 | a | 32.42 | a | 46.83 | a | 55.81 | b | 63.17 | 67.19 | 63.32 | a | 56.48 | a | 39.10 | 31.24 | a | 23.63 | a | 43.54 | |||||
1988 | 11.00 | 10.57 | 24.88 | b | 40.43 | ----- | z | ----- | z | 69.40 | 65.90 | 55.87 | 39.24 | 30.65 | 16.29 | 36.42 | b | |||||||||
1989 | 19.35 | 9.14 | 20.65 | 36.67 | 51.55 | 58.45 | 67.26 | 64.42 | 56.48 | 46.37 | 24.28 | 8.21 | 38.57 | |||||||||||||
1990 | 22.17 | a | 18.46 | 30.34 | 43.93 | b | 48.16 | 60.63 | 63.69 | 63.40 | 55.50 | g | 42.52 | a | 33.92 | 17.05 | 40.39 | a | ||||||||
1991 | 10.39 | 20.11 | 27.52 | 43.93 | 57.50 | 63.90 | 64.02 | g | 65.81 | 52.36 | b | 42.65 | 26.65 | 18.87 | 39.06 | a | ||||||||||
1992 | 17.16 | 20.28 | 23.66 | 36.57 | 54.38 | b | 57.13 | 58.50 | 59.08 | 54.67 | 42.24 | 27.63 | 19.00 | 39.19 | ||||||||||||
1993 | 15.31 | 14.09 | 25.89 | 35.27 | b | 51.08 | 58.23 | 66.52 | a | ----- | z | 50.60 | a | 41.39 | 26.34 | b | 21.37 | a | 36.92 | a | ||||||
1994 | 2.76 | 9.28 | a | 27.45 | 38.33 | 52.21 | 61.56 | c | 63.97 | a | 61.02 | a | 58.48 | a | 47.90 | a | 33.57 | b | 26.19 | j | 41.50 | a | ||||
1995 | 17.08 | 14.74 | a | 31.86 | b | 35.28 | 53.67 | a | 67.98 | a | 66.16 | 68.15 | 53.85 | 44.71 | 20.50 | a | 14.68 | 40.72 | ||||||||
1996 | 11.66 | b | 15.50 | k | 19.57 | a | 32.07 | a | 48.79 | 63.63 | d | 60.81 | 64.06 | 55.47 | a | 42.18 | c | 23.66 | a | 16.27 | a | 39.83 | a | |||
1997 | 9.28 | d | 14.85 | a | 20.35 | a | 34.40 | 42.32 | 63.48 | 63.11 | 57.92 | a | 54.17 | a | 42.62 | a | 26.78 | a | 23.80 | a | 37.76 | |||||
1998 | 15.56 | 27.06 | a | 25.07 | d | 42.21 | b | 55.17 | a | 58.27 | ----- | z | ----- | z | ----- | z | 48.08 | g | 33.57 | 22.05 | c | 34.87 | d | |||
1999 | 12.32 | a | 23.23 | b | 27.71 | e | 42.35 | f | 55.84 | b | 61.48 | b | 68.45 | 61.53 | a | 56.57 | 42.86 | c | 37.09 | a | 20.73 | c | 42.53 | a | ||
2000 | 12.47 | 23.00 | c | 33.45 | 35.72 | 54.93 | b | 59.02 | b | 63.53 | ----- | z | 53.79 | a | 47.00 | n | 32.48 | a | 11.12 | a | 37.95 | b | ||||
2001 | ----- | z | 13.22 | a | 24.79 | 42.82 | 54.79 | 62.64 | a | 65.81 | 67.13 | a | 55.25 | b | 43.63 | a | 38.63 | c | 22.15 | a | 44.62 | a | ||||
2002 | 17.50 | a | 18.85 | d | 16.78 | d | 35.43 | b | 46.61 | c | 62.12 | a | 70.12 | f | 62.78 | f | 58.65 | d | 37.21 | e | 25.29 | a | 21.14 | c | 33.96 | b |
2003 | 9.87 | 7.12 | d | 22.43 | b | 35.94 | d | 49.66 | f | 58.79 | d | 64.16 | f | 61.96 | e | 54.90 | a | 42.15 | 28.57 | a | 21.19 | 34.29 | b | |||
2004 | 7.12 | a | 18.93 | a | 26.93 | c | 35.65 | d | 48.57 | d | 57.12 | f | 60.30 | i | 56.56 | d | 59.69 | d | 44.30 | f | 32.48 | b | 14.43 | b | 33.37 | c |
2005 | 9.75 | c | 17.82 | c | 19.10 | a | 40.90 | e | 48.05 | c | 64.77 | d | 65.61 | c | 65.04 | d | 60.27 | f | 47.37 | e | 31.67 | c | 17.57 | c | 38.88 | a |
2006 | 23.79 | b | 11.16 | c | 21.68 | a | 40.66 | a | 49.89 | 57.85 | 65.10 | b | 60.23 | a | 49.47 | 35.52 | 30.72 | 21.66 | 38.98 | |||||||
2007 | 12.79 | 5.50 | a | 25.47 | 31.48 | 51.94 | 59.75 | 62.37 | 61.76 | ----- | z | 42.95 | k | 27.40 | 15.52 | 35.40 | b | |||||||||
2008 | 15.27 | 8.91 | 14.66 | 35.15 | 45.68 | a | 59.87 | d | 62.37 | 60.92 | k | 53.61 | p | 43.21 | 29.52 | 11.37 | 32.60 | b | ||||||||
2009 | 5.89 | 15.12 | 24.18 | 37.02 | 49.03 | 57.23 | 57.90 | 60.00 | 58.35 | 37.87 | 36.22 | 15.35 | 37.85 | |||||||||||||
2010 | 20.47 | b | 19.66 | 33.28 | a | 44.85 | 54.69 | 59.28 | 66.24 | 65.82 | 50.34 | a | 45.05 | 31.62 | 15.73 | 42.25 | ||||||||||
2011 | 9.73 | 14.45 | 21.55 | 34.47 | a | 48.68 | 58.40 | 67.31 | 63.26 | 53.67 | 45.53 | 31.22 | 20.77 | 39.08 | ||||||||||||
2012 | 16.40 | 21.00 | 37.63 | 37.82 | 54.27 | 62.00 | 67.63 | 61.77 | 50.93 | 39.79 | g | 29.63 | 22.18 | 41.93 | a | |||||||||||
2013 | 13.87 | 10.98 | 16.55 | 29.17 | 47.50 | 57.78 | 63.44 | 56.77 | t | 53.46 | f | 41.73 | 25.77 | 7.28 | a | 31.41 | b | |||||||||
2014 | 2.06 | 3.34 | 10.97 | 30.55 | 48.40 | 58.58 | 58.90 | 58.98 | 52.33 | a | 40.27 | 18.91 | a | 18.06 | 33.45 | |||||||||||
2015 | 8.97 | -1.21 | 20.94 | 35.57 | 49.26 | 56.07 | a | 62.45 | c | 60.89 | i | 59.50 | a | 41.76 | b | 33.77 | 25.77 | 35.71 | a | |||||||
2016 | 12.90 | g | 17.21 | 25.35 | 32.92 | 49.92 | 57.92 | 63.15 | 62.91 | b | 56.90 | 43.74 | 35.97 | 15.98 | 42.00 | a | ||||||||||
2017 | 17.58 | a | 18.83 | a | 21.05 | 37.47 | 45.69 | b | 58.76 | a | 61.94 | 58.50 | b | 56.98 | a | 45.40 | a | 24.95 | 12.27 | 38.29 | ||||||
2018 | 12.66 | b | 11.62 | 22.44 | 28.26 | c | 57.34 | b | 61.27 | 65.50 | 63.43 | a | 56.62 | 37.12 | a | 22.23 | 21.29 | 38.31 | ||||||||
2019 | 9.69 | 9.84 | 21.94 | 35.72 | 45.50 | 58.50 | 66.55 | 60.68 | 56.48 | 41.34 | 23.37 | 19.65 | 37.44 | |||||||||||||
2020 | 18.73 | a | 16.17 | 27.60 | a | 33.13 | 49.94 | 61.58 | 67.56 | 63.58 | 52.68 | 36.16 | 33.72 | 20.32 | 40.10 | |||||||||||
2021 | 18.74 | 9.32 | 29.68 | 38.73 | 50.44 | 64.07 | a | 64.05 | 66.37 | 56.52 | 51.06 | 29.47 | 21.07 | a | 41.63 | |||||||||||
2022 | 7.39 | 8.29 | 22.02 | 32.43 | 51.83 | a | 60.25 | 64.11 | 63.24 | 55.32 | 43.60 | 32.08 | 16.97 | 38.13 | ||||||||||||
2023 | 19.29 | 17.91 | 23.44 | 36.32 | 52.35 | 60.67 | 62.02 | 59.94 | 58.77 | 44.92 | 30.15 | 28.35 | 41.18 | |||||||||||||
2024 | 17.79 | 24.67 | 28.03 | 38.53 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.50 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.41 | 14.65 | 24.15 | 37.17 | 50.95 | 59.80 | 64.23 | 62.35 | 54.57 | 42.93 | 29.34 | 17.49 | 38.90 | |||||||||||||
S.D. | 5.23 | 5.95 | 5.26 | 4.19 | 3.94 | 2.90 | 2.66 | 2.71 | 2.74 | 3.55 | 4.11 | 4.75 | 1.82 | |||||||||||||
SKEW | -0.08 | -0.07 | 0.18 | 0.14 | 0.24 | 0.03 | -0.27 | -0.06 | -0.21 | 0.01 | -0.24 | -0.39 | -0.10 | |||||||||||||
MAX | 23.79 | 27.06 | 37.63 | 46.83 | 60.82 | 67.98 | 69.42 | 68.15 | 59.69 | 51.06 | 38.63 | 28.35 | 43.54 | |||||||||||||
MIN | 1.47 | -1.21 | 10.97 | 28.26 | 42.32 | 51.57 | 57.90 | 56.56 | 48.30 | 35.52 | 18.91 | 6.84 | 33.45 | |||||||||||||
YRS | 54 | 55 | 56 | 55 | 54 | 54 | 51 | 49 | 50 | 51 | 56 | 55 | 35 |