YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | 35.29 | r | 48.92 | 61.35 | 67.16 | 66.45 | 59.07 | 45.59 | c | 27.87 | 13.32 | 48.72 | d | |||||||
1968 | 7.03 | 10.07 | a | 33.79 | 43.19 | a | 50.40 | 61.63 | 66.15 | 64.34 | 56.97 | 44.94 | 29.93 | 8.55 | 39.75 | |||||||||||
1969 | -1.88 | b | 12.23 | 15.12 | c | 43.13 | 55.63 | 56.90 | 66.26 | 70.92 | 58.70 | 39.24 | 30.65 | 16.90 | 38.65 | |||||||||||
1970 | 2.39 | 11.59 | a | 17.21 | 37.88 | 52.00 | 67.78 | 68.45 | 67.39 | 57.22 | 43.34 | 24.57 | 8.58 | 38.20 | ||||||||||||
1971 | -1.75 | a | 10.11 | 21.15 | a | 41.60 | 52.60 | 65.32 | 65.20 | a | 69.55 | 57.42 | 46.40 | b | 28.72 | c | 10.81 | 38.93 | ||||||||
1972 | 3.97 | a | 6.97 | 24.65 | 39.67 | 58.68 | 63.43 | 65.58 | 70.34 | 56.13 | d | 42.30 | c | 27.55 | b | 6.10 | b | 38.78 | ||||||||
1973 | 16.54 | c | 18.23 | 37.03 | a | 42.12 | 54.84 | 64.25 | b | 68.05 | 71.63 | 56.62 | 50.23 | 23.79 | b | 10.20 | a | 42.79 | ||||||||
1974 | 3.89 | 10.86 | 20.55 | 40.67 | 50.48 | c | 63.97 | 70.56 | 60.86 | b | 52.82 | b | 46.25 | c | 26.53 | 17.23 | 38.72 | |||||||||
1975 | 10.17 | b | 7.70 | c | 17.40 | g | 32.53 | 53.50 | b | 62.22 | l | 69.90 | b | 64.53 | a | 54.08 | d | 46.67 | a | 30.11 | b | 15.47 | 38.47 | b | ||
1976 | 9.50 | 21.11 | a | 22.63 | 46.29 | a | 56.93 | b | 65.88 | e | 66.54 | f | 69.24 | b | 59.71 | f | 38.61 | d | 22.57 | a | 11.11 | d | 36.39 | b | ||
1977 | -3.70 | d | 20.31 | a | 32.36 | b | 49.35 | f | 64.71 | b | 65.22 | c | 68.43 | b | 60.86 | i | 55.40 | f | 45.06 | g | 23.95 | h | 4.55 | c | 35.98 | e |
1978 | -3.24 | d | 3.38 | d | 22.46 | e | 42.59 | g | 58.65 | g | 63.78 | c | 66.94 | e | ----- | z | 60.02 | e | 46.32 | i | 18.52 | e | 5.57 | b | 29.68 | d |
1979 | -5.45 | b | -2.71 | b | 18.39 | 31.03 | 48.11 | 63.90 | e | 68.45 | c | 65.08 | e | 60.44 | e | 43.69 | g | 25.07 | g | 21.43 | h | 38.58 | c | |||
1980 | 5.06 | d | 10.27 | a | 22.52 | i | 48.64 | b | 59.07 | b | 64.59 | a | 69.47 | b | 63.56 | f | 54.11 | c | 39.50 | f | 32.45 | b | 15.02 | h | 42.96 | d |
1981 | 13.31 | e | 17.40 | g | 33.82 | a | 45.62 | d | 54.59 | d | 60.24 | c | 69.08 | e | 68.75 | e | 58.17 | d | 44.50 | d | 34.50 | a | 10.78 | a | 44.85 | a |
1982 | -9.43 | c | 9.54 | b | 20.95 | a | 39.34 | a | 55.31 | b | 59.13 | c | 69.35 | a | 66.53 | a | 56.13 | g | 45.76 | b | 23.69 | c | 21.64 | b | 36.53 | a |
1983 | 19.45 | a | 22.54 | a | 27.82 | 38.75 | 52.19 | e | 59.50 | v | 74.21 | b | 74.67 | a | 56.12 | a | 43.50 | e | 30.88 | 4.32 | i | 44.01 | b | |||
1984 | 14.57 | h | 24.26 | d | 22.66 | 42.63 | c | 53.07 | a | 63.42 | 69.61 | 71.29 | e | 50.64 | e | 43.17 | b | 25.90 | d | 8.81 | d | 43.22 | a | |||
1985 | 7.50 | e | 8.40 | b | 32.65 | a | 46.36 | a | 59.45 | 57.64 | b | 68.16 | b | 62.67 | a | 52.00 | c | 42.81 | d | 11.85 | f | 3.92 | g | 43.76 | b | |
1986 | 15.86 | b | 9.83 | b | 34.14 | b | 41.15 | 57.46 | d | 66.70 | c | 69.16 | 65.00 | c | 53.64 | e | 46.05 | a | 19.77 | d | 19.34 | c | 41.51 | |||
1987 | 17.53 | b | 25.54 | 27.18 | 50.87 | 61.34 | b | 67.60 | 69.98 | 64.59 | b | 59.22 | 41.55 | 33.43 | 22.98 | e | 45.15 | |||||||||
1988 | 7.52 | c | 11.57 | b | 28.23 | a | 43.85 | 61.03 | 72.34 | b | 72.26 | 69.00 | 56.88 | 43.12 | a | 27.06 | d | 14.27 | c | 42.26 | ||||||
1989 | 9.98 | d | 3.00 | a | 20.03 | 42.17 | 56.28 | a | 60.97 | a | 72.87 | a | 68.55 | 58.38 | 45.33 | b | 27.30 | g | 7.32 | 40.44 | a | |||||
1990 | 23.53 | b | 18.45 | 30.70 | c | 43.34 | a | 53.23 | e | 64.98 | 68.12 | c | 70.14 | f | 60.75 | b | 45.86 | b | 29.90 | 11.93 | d | 40.98 | a | |||
1991 | 5.69 | d | 24.38 | b | 30.82 | a | 46.08 | 58.42 | 67.28 | a | 68.16 | 69.91 | b | 57.78 | 39.95 | a | 21.14 | b | 18.10 | f | 44.51 | a | ||||
1992 | 19.71 | 24.16 | 32.69 | d | 39.91 | c | 58.80 | a | 64.21 | b | 62.85 | e | 63.98 | g | 56.31 | a | 44.65 | g | 25.28 | a | 7.42 | 39.13 | b | |||
1993 | 5.65 | d | 9.21 | 25.77 | 41.93 | b | 55.56 | 59.31 | d | 64.00 | a | 65.64 | b | 52.59 | c | 43.84 | f | 25.81 | c | 14.77 | 38.21 | a | ||||
1994 | -3.34 | b | 3.57 | a | 30.61 | 43.66 | e | 59.08 | 64.98 | b | 65.05 | a | 65.60 | a | 60.38 | 46.39 | d | 30.88 | e | 16.82 | c | 40.31 | ||||
1995 | 6.92 | f | 11.26 | g | 23.33 | b | 36.89 | b | 51.04 | d | 66.88 | a | 67.85 | a | 70.09 | d | 56.26 | c | 42.85 | e | 21.30 | 11.44 | 44.79 | b | ||
1996 | -0.23 | 15.59 | b | 18.19 | 34.91 | b | 48.19 | j | 67.12 | e | 66.03 | b | 67.98 | c | 55.13 | o | 43.36 | b | 12.67 | g | 2.78 | b | 35.08 | c | ||
1997 | -0.50 | a | 14.43 | g | 21.74 | b | 36.88 | f | 53.24 | d | 67.87 | c | 69.29 | e | 65.70 | c | 60.66 | b | 46.26 | d | 23.90 | 24.26 | 43.24 | b | ||
1998 | 9.27 | a | 26.70 | a | 22.77 | 46.72 | c | 57.96 | g | 61.10 | f | 69.50 | c | 70.64 | f | 63.34 | e | 46.61 | c | 26.72 | c | 14.42 | f | 38.95 | d | |
1999 | 7.10 | e | 20.22 | c | 27.94 | e | 41.28 | g | 54.75 | e | 64.14 | a | 69.08 | a | 67.05 | 55.52 | a | 44.59 | c | 37.79 | b | 23.21 | b | 42.85 | a | |
2000 | 12.50 | g | 22.65 | b | 36.81 | g | 43.68 | k | 57.30 | f | 63.16 | b | 70.02 | b | 68.73 | a | 58.78 | e | 47.33 | a | 24.21 | m | 2.56 | e | 47.60 | e |
2001 | 17.12 | f | 7.00 | j | 27.61 | l | 41.66 | h | 57.17 | d | 64.24 | k | 69.87 | h | 69.07 | c | 56.52 | i | 42.12 | k | 37.83 | r | 19.64 | q | 63.12 | j |
2002 | 18.50 | n | 24.25 | l | 14.64 | q | 42.08 | q | 46.66 | i | 64.21 | r | 69.69 | o | 65.21 | n | 56.45 | k | 34.26 | j | 30.90 | t | 17.97 | n | ----- | z |
2003 | 10.89 | v | 12.23 | q | 30.71 | s | 44.25 | b | 54.11 | 63.35 | 67.96 | f | 70.73 | g | 55.85 | c | 47.19 | g | 22.13 | g | 19.72 | d | 47.46 | g | ||
2004 | -0.25 | e | 15.75 | c | 29.81 | d | 43.67 | d | 49.20 | a | 60.30 | 66.73 | 60.42 | 56.38 | d | 44.70 | d | 32.96 | d | 17.60 | 39.77 | |||||
2005 | 6.20 | c | 17.79 | g | 29.32 | i | 45.79 | m | 54.04 | c | 65.18 | b | 71.02 | j | 66.21 | b | 59.82 | e | 46.05 | j | 29.21 | r | 15.64 | m | 50.29 | g |
2006 | 25.48 | g | 14.19 | l | 29.02 | h | 50.38 | j | 57.61 | d | 65.66 | b | 73.90 | 69.57 | c | 56.38 | 39.40 | f | 29.04 | q | 21.50 | n | 64.63 | g | ||
2007 | 17.79 | q | 7.65 | h | 31.90 | e | 40.84 | b | 57.07 | b | 65.26 | e | 73.40 | g | 65.78 | b | 58.24 | a | 47.32 | f | 28.05 | j | 9.94 | f | 53.18 | f |
2008 | 9.15 | g | 4.47 | j | 23.27 | g | 39.82 | 52.90 | f | 61.38 | e | 68.73 | c | 68.45 | c | 57.65 | 44.35 | a | 30.52 | h | 4.43 | h | 56.73 | f | ||
2009 | 2.38 | c | 10.61 | a | 18.37 | e | 39.95 | b | 51.29 | 61.47 | 65.16 | 65.02 | 63.75 | 38.73 | a | 36.53 | 7.53 | a | 38.40 | |||||||
2010 | 9.21 | 8.57 | a | 31.60 | a | 48.04 | b | 54.23 | 63.96 | b | 70.18 | a | 69.95 | 55.53 | 48.48 | b | 27.71 | b | 7.34 | i | 44.32 | a | ||||
2011 | 5.24 | f | 8.52 | d | 17.59 | c | 39.58 | d | 51.32 | 62.98 | 71.65 | 69.15 | a | 60.14 | i | 48.78 | b | 30.74 | c | 22.71 | 42.30 | b | ||||
2012 | 18.98 | 20.67 | b | 39.19 | 45.67 | g | 55.82 | c | 66.12 | 74.06 | 66.77 | 57.68 | 41.45 | 26.38 | 14.70 | f | 46.71 | b | ||||||||
2013 | 9.56 | f | 12.89 | e | 10.96 | g | 25.74 | g | 53.66 | b | 65.46 | g | 70.25 | i | 69.25 | a | 62.63 | g | 51.32 | t | 27.66 | h | 3.87 | l | 45.27 | i |
2014 | 3.26 | j | 2.86 | j | 24.02 | j | 36.80 | g | 53.39 | c | 63.57 | i | 65.93 | j | 67.50 | i | 58.35 | g | 47.20 | i | 20.40 | o | 14.26 | h | 53.39 | k |
2015 | 12.93 | k | 5.92 | i | 30.86 | i | 44.04 | f | 54.17 | d | 66.52 | a | 70.92 | a | 68.06 | 62.68 | 47.34 | b | 35.08 | e | 18.85 | h | 57.82 | e | ||
2016 | 11.95 | c | 22.22 | 34.74 | b | 39.62 | a | 57.20 | d | 66.06 | d | 68.96 | e | 67.73 | 57.82 | 46.31 | 39.80 | 10.31 | 43.56 | |||||||
2017 | 10.72 | a | 18.43 | 24.48 | 41.23 | 53.95 | 64.00 | 70.60 | 64.73 | 57.57 | 46.11 | 24.16 | a | 14.94 | 40.91 | |||||||||||
2018 | 9.08 | a | 4.84 | 23.89 | 32.67 | 61.03 | 68.35 | 69.13 | 67.24 | 55.18 | 37.50 | 19.05 | 18.74 | 38.89 | ||||||||||||
2019 | 4.77 | -4.68 | 17.71 | 40.40 | 49.16 | 63.72 | 70.05 | 64.48 | 58.13 | 36.61 | 24.40 | 12.81 | 36.46 | |||||||||||||
2020 | 9.48 | 14.38 | 26.74 | 36.16 | a | 51.26 | 68.02 | 71.73 | 68.90 | 57.50 | 38.35 | 30.15 | 21.53 | 41.18 | ||||||||||||
2021 | 19.87 | 3.29 | 33.55 | 39.05 | 53.10 | 70.22 | 74.53 | 69.52 | 61.60 | 47.61 | 30.85 | 13.62 | a | 43.07 | ||||||||||||
2022 | 6.11 | 3.98 | a | 24.75 | a | 31.55 | 52.71 | 65.10 | 69.63 | 68.05 | 59.67 | 45.60 | 22.38 | 4.62 | b | 37.85 | ||||||||||
2023 | 10.29 | 8.61 | 11.53 | 30.37 | 59.63 | 69.84 | a | 66.47 | 66.71 | 61.78 | 43.82 | 30.08 | 24.68 | 40.32 | ||||||||||||
2024 | 10.08 | 25.67 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.88 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 7.27 | 13.19 | 25.98 | 40.89 | 54.94 | 64.47 | 68.93 | 67.44 | 57.59 | 44.15 | 27.89 | 13.44 | 40.26 | |||||||||||||
S.D. | 7.57 | 7.96 | 6.51 | 4.75 | 3.63 | 3.12 | 2.63 | 2.74 | 2.87 | 3.19 | 5.04 | 6.29 | 2.18 | |||||||||||||
SKEW | 0.06 | -0.05 | -0.04 | -0.40 | 0.34 | -0.15 | 0.10 | -0.25 | -0.09 | -0.64 | 0.23 | 0.14 | 0.50 | |||||||||||||
MAX | 23.53 | 26.70 | 39.19 | 50.87 | 64.71 | 72.34 | 74.53 | 74.67 | 63.75 | 50.23 | 39.80 | 24.68 | 45.15 | |||||||||||||
MIN | -9.43 | -4.68 | 11.53 | 30.37 | 48.11 | 56.90 | 62.85 | 60.42 | 50.64 | 36.61 | 18.52 | 2.56 | 36.46 | |||||||||||||
YRS | 44 | 45 | 44 | 43 | 51 | 50 | 49 | 48 | 48 | 43 | 42 | 40 | 21 |