YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 13.33 | a | 13.33 | k |
1974 | 7.76 | 14.54 | 25.35 | a | 43.78 | 52.32 | a | 65.25 | 76.05 | 66.35 | a | 55.33 | 49.17 | a | 32.53 | 22.32 | 42.56 | |||||||||
1975 | 13.68 | a | 10.54 | 19.62 | b | 35.57 | 56.90 | 65.02 | 75.63 | 69.44 | 56.20 | 49.32 | 33.05 | 16.98 | 41.83 | |||||||||||
1976 | ----- | z | 26.40 | 29.11 | 49.07 | a | 55.92 | 70.82 | 75.00 | 74.85 | 60.43 | b | 42.84 | 25.66 | a | 12.89 | 47.54 | a | ||||||||
1977 | -0.93 | a | 22.54 | 33.21 | 51.63 | 66.53 | 68.45 | a | 74.02 | 64.79 | 60.03 | 48.13 | ----- | z | 11.84 | 45.48 | a | |||||||||
1978 | 0.77 | a | 7.30 | a | 25.84 | 42.35 | 58.81 | 65.73 | 71.56 | 71.69 | 65.10 | a | 48.16 | 28.03 | 13.79 | 41.59 | ||||||||||
1979 | -1.60 | 1.77 | 22.48 | 37.85 | 51.39 | 65.42 | 71.52 | 66.34 | 63.83 | 46.34 | 29.55 | 24.71 | 39.97 | |||||||||||||
1980 | 13.26 | 14.64 | 23.87 | 49.67 | 61.13 | a | 67.52 | 73.48 | 70.33 | a | 60.70 | 45.48 | b | 37.28 | 17.97 | o | 47.03 | a | ||||||||
1981 | 16.42 | 24.00 | a | 37.18 | a | 50.28 | 58.10 | 66.33 | 73.40 | 72.06 | 61.70 | 46.87 | 38.25 | 13.48 | 46.51 | |||||||||||
1982 | -3.48 | e | 13.93 | f | 28.38 | b | 42.62 | 59.89 | 62.27 | 74.34 | 71.28 | a | 60.53 | 47.52 | 28.07 | 23.69 | d | 45.01 | a | |||||||
1983 | 20.02 | d | 24.21 | d | 31.52 | b | 41.38 | 53.48 | 66.73 | 77.61 | 77.79 | 61.20 | 47.95 | 31.88 | d | 0.94 | d | 44.56 | ||||||||
1984 | 15.69 | b | 28.09 | 22.79 | 45.33 | 55.61 | 67.72 | 72.58 | 73.85 | 56.57 | 49.45 | 32.68 | b | 15.09 | i | 47.31 | a | |||||||||
1985 | 9.29 | e | 14.29 | b | 35.55 | 49.86 | b | 62.26 | 62.39 | b | 72.27 | 66.35 | 57.40 | 46.16 | b | 19.85 | 7.07 | d | 41.90 | |||||||
1986 | 19.30 | c | 11.75 | d | 34.56 | d | 45.93 | b | 58.05 | 69.38 | 73.08 | 66.79 | 57.92 | 47.41 | b | 26.45 | b | 26.65 | d | 44.77 | ||||||
1987 | 22.91 | d | 31.14 | 33.48 | b | 51.82 | b | 63.59 | d | 70.80 | 75.39 | 68.63 | 62.07 | 44.31 | 35.82 | e | 24.87 | h | 50.91 | a | ||||||
1988 | 10.35 | h | 14.26 | b | 33.66 | b | 47.55 | 65.21 | 76.16 | b | 78.81 | 73.37 | 60.15 | d | 44.77 | 30.43 | c | 19.36 | f | 52.44 | b | |||||
1989 | 19.98 | e | 7.66 | f | 25.67 | e | 44.50 | b | 59.69 | b | 65.59 | b | 76.42 | 71.02 | 61.57 | b | 47.64 | b | 28.35 | d | 6.79 | g | 50.04 | b | ||
1990 | 25.74 | b | 22.40 | d | 33.82 | 45.75 | 55.89 | 68.08 | 70.44 | 70.38 | a | 63.45 | 45.25 | a | 34.19 | a | 14.06 | 45.79 | ||||||||
1991 | 10.23 | a | 24.52 | 30.53 | 48.27 | 61.13 | 70.41 | a | 71.27 | 72.00 | 57.97 | 44.55 | 25.96 | e | 21.50 | 44.86 | ||||||||||
1992 | 21.27 | 25.98 | a | 34.82 | 41.10 | 59.83 | b | 63.82 | 64.38 | g | 65.19 | 55.82 | m | 45.98 | 27.94 | e | 12.50 | g | 42.88 | c | ||||||
1993 | 7.93 | h | 14.03 | i | 29.34 | l | 41.67 | g | 55.52 | g | 63.12 | f | 68.02 | d | 68.02 | h | 53.39 | k | 41.86 | j | 24.95 | k | 15.50 | i | 68.02 | k |
1994 | -1.80 | h | 5.44 | j | 32.67 | h | 44.00 | f | 61.31 | e | 67.83 | g | 68.83 | d | 66.65 | g | 61.19 | l | 49.20 | h | 33.88 | j | 20.86 | m | 65.07 | j |
1995 | 9.78 | m | 16.17 | e | 27.39 | i | 40.07 | g | 55.82 | i | 69.74 | a | 71.00 | g | 70.72 | m | 56.77 | j | 44.93 | i | 25.60 | j | 15.03 | k | 42.96 | j |
1996 | 1.44 | o | 14.08 | j | 21.85 | g | 38.67 | i | 54.20 | i | 68.70 | e | 69.75 | c | 70.09 | h | 58.93 | i | 46.33 | p | 19.36 | h | 7.28 | h | 69.22 | j |
1997 | 0.90 | p | 18.80 | h | 27.10 | j | 40.54 | g | 54.20 | h | 69.46 | c | 71.54 | f | 68.16 | i | 61.80 | j | 47.72 | m | 26.74 | g | 26.24 | h | 69.46 | k |
1998 | 12.57 | i | 27.43 | f | 26.76 | j | ----- | z | 61.94 | e | 64.42 | e | 72.90 | 72.09 | h | 64.84 | k | 49.68 | l | 34.50 | i | 21.88 | g | 66.42 | i | |
1999 | 7.91 | i | 26.76 | i | 33.06 | g | 44.48 | b | 57.89 | 65.67 | a | 73.56 | 68.94 | 57.28 | 44.95 | c | 38.87 | 25.62 | b | 53.03 | c | |||||
2000 | 11.63 | 22.64 | a | 36.87 | 42.35 | 59.09 | c | 64.62 | a | 71.44 | 69.55 | 57.05 | a | 49.27 | a | 27.64 | a | 4.52 | a | 43.05 | ||||||
2001 | 17.97 | a | 4.48 | 23.67 | a | 42.88 | 58.85 | a | 67.07 | 73.29 | b | 71.55 | a | 58.52 | a | 45.26 | 42.07 | 22.40 | 44.00 | |||||||
2002 | 17.33 | d | 26.06 | a | 19.18 | 40.22 | a | 51.48 | 69.92 | 74.06 | 68.60 | 62.47 | 39.52 | a | 31.20 | 22.30 | a | 43.53 | ||||||||
2003 | 12.48 | 11.52 | 26.32 | 45.50 | 54.21 | 65.09 | b | 72.33 | b | 72.00 | b | 57.53 | a | 49.89 | c | 28.66 | b | 20.60 | g | 45.05 | a | |||||
2004 | 8.55 | a | 19.20 | b | 34.05 | b | 45.95 | 52.68 | c | 62.36 | b | 67.27 | e | 63.20 | a | 61.15 | c | 47.44 | 33.90 | a | 21.41 | d | 43.10 | |||
2005 | 9.16 | c | 22.50 | 29.30 | a | 48.03 | 54.47 | a | 69.52 | 72.02 | b | 68.22 | a | 62.40 | d | 48.40 | 35.16 | e | 18.50 | 44.81 | ||||||
2006 | 24.66 | 14.93 | 29.85 | a | 48.83 | 57.23 | a | 65.79 | b | 75.87 | l | 69.82 | f | 56.85 | c | 43.77 | c | 31.42 | d | 25.58 | 39.89 | b | ||||
2007 | 16.67 | b | 9.50 | 32.48 | 40.45 | 58.93 | c | 67.83 | d | 71.81 | e | 66.30 | a | 59.45 | i | 49.72 | f | 32.62 | e | 11.77 | e | 40.84 | b | |||
2008 | 7.15 | d | 9.52 | a | 24.63 | a | 39.18 | e | 53.14 | m | 63.82 | b | 70.91 | i | 69.25 | c | 59.46 | b | 46.62 | a | 32.12 | a | 7.80 | a | 35.96 | b |
2009 | 3.47 | b | 13.86 | 21.67 | d | 41.05 | 54.50 | c | 61.85 | f | 66.34 | c | 64.44 | e | 62.69 | a | 39.84 | 39.06 | d | 11.22 | b | 38.01 | a | |||
2010 | 8.58 | 9.57 | 32.56 | 50.22 | a | 55.06 | 66.07 | 71.45 | 71.79 | e | 56.35 | 49.58 | a | 30.02 | 11.34 | 42.72 | ||||||||||
2011 | 4.27 | 10.88 | b | 19.52 | a | 42.20 | 52.76 | 64.13 | 74.91 | b | 69.34 | 58.67 | 50.63 | 33.02 | a | 24.83 | a | 42.10 | ||||||||
2012 | 19.85 | a | 22.34 | 39.40 | a | 46.87 | 59.15 | a | 67.40 | f | 75.82 | 66.55 | b | 58.16 | b | 43.66 | 32.04 | c | 15.40 | b | 43.57 | a | ||||
2013 | 10.91 | h | 14.91 | f | 16.53 | b | 32.18 | 54.58 | k | 66.34 | k | 70.28 | b | 71.78 | m | 61.50 | b | 50.36 | t | 28.11 | c | 8.68 | 36.21 | f | ||
2014 | 8.21 | b | 8.18 | 26.05 | c | 39.14 | a | 55.55 | j | 66.50 | f | 67.65 | e | 67.67 | p | 60.37 | 48.65 | 22.58 | 21.37 | 33.58 | c | |||||
2015 | 17.58 | 8.36 | 32.10 | 46.27 | 54.42 | 67.10 | 71.29 | 68.27 | 65.73 | 49.81 | 38.67 | a | 23.15 | 45.23 | ||||||||||||
2016 | 14.85 | a | 24.07 | 37.84 | 44.33 | 57.84 | 68.85 | 70.77 | a | 70.10 | 62.05 | 48.23 | 41.73 | 16.40 | 46.42 | |||||||||||
2017 | 14.37 | 26.88 | 28.90 | 44.85 | 55.77 | 66.53 | 71.66 | 65.76 | 62.20 | 47.82 | 29.75 | 18.53 | 44.42 | |||||||||||||
2018 | 13.19 | 9.80 | 27.65 | 33.02 | a | 63.21 | 69.76 | a | 71.26 | 68.23 | a | 61.05 | 41.34 | 23.80 | 22.60 | 42.08 | ||||||||||
2019 | 7.61 | 2.12 | 21.98 | a | 42.60 | 51.47 | 66.91 | a | 71.81 | 66.93 | a | 61.52 | a | 41.13 | a | 28.32 | 17.16 | 39.96 | ||||||||
2020 | 13.18 | 17.66 | 31.61 | 39.92 | 54.02 | 70.52 | 73.53 | 71.50 | 58.63 | 40.55 | 35.95 | 23.60 | 44.22 | |||||||||||||
2021 | 20.92 | 7.54 | 36.23 | 41.80 | 56.18 | 71.28 | 73.68 | 70.92 | 62.95 | 51.40 | 34.30 | 18.24 | 45.45 | |||||||||||||
2022 | 4.98 | 9.36 | 27.44 | 36.10 | 55.71 | 69.20 | 73.18 | 69.95 | a | 62.12 | 47.74 | 30.48 | 14.02 | a | 41.69 | |||||||||||
2023 | 13.73 | 14.20 | 17.47 | 36.63 | 60.66 | 71.77 | 69.21 | b | 70.83 | a | 64.38 | ----- | z | ----- | z | ----- | z | 46.54 | c | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.52 | 16.09 | 28.72 | 43.62 | 57.55 | 67.36 | 72.47 | 69.38 | 60.32 | 46.41 | 31.61 | 17.02 | 43.48 | |||||||||||||
S.D. | 7.26 | 7.76 | 5.99 | 4.83 | 3.79 | 2.88 | 2.67 | 3.04 | 2.61 | 3.01 | 4.96 | 6.52 | 1.83 | |||||||||||||
SKEW | -0.32 | 0.08 | -0.23 | -0.37 | 0.29 | 0.43 | -0.07 | 0.26 | -0.02 | -0.69 | 0.07 | -0.47 | -0.19 | |||||||||||||
MAX | 25.74 | 31.14 | 39.40 | 51.82 | 66.53 | 76.16 | 78.81 | 77.79 | 65.73 | 51.40 | 42.07 | 26.65 | 46.51 | |||||||||||||
MIN | -3.48 | 1.77 | 16.53 | 32.18 | 51.39 | 62.27 | 66.34 | 63.20 | 55.33 | 39.52 | 19.85 | 0.94 | 39.96 | |||||||||||||
YRS | 40 | 41 | 43 | 44 | 43 | 44 | 45 | 41 | 42 | 41 | 42 | 37 | 25 |