YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1981 | ----- | z | ----- | z | ----- | z | ----- | z | 36.77 | 40.41 | a | 46.23 | a | 48.00 | c | 38.97 | a | 32.60 | a | 29.07 | 16.82 | c | 36.11 | d | ||
1982 | -3.60 | a | 7.96 | a | 15.57 | c | 22.38 | a | 33.23 | a | 40.00 | b | 46.58 | 47.42 | 40.93 | 32.60 | a | 17.79 | b | 17.67 | a | 26.54 | ||||
1983 | 20.60 | a | 25.96 | 22.25 | g | 26.93 | 34.97 | 42.93 | 46.94 | 49.00 | 38.96 | b | 36.84 | 25.79 | a | -4.72 | b | 31.29 | a | |||||||
1984 | 20.32 | 27.50 | a | 24.67 | a | 29.37 | 36.35 | 42.77 | 47.68 | 47.77 | a | 35.73 | 27.06 | 23.38 | d | 2.19 | 30.40 | |||||||||
1985 | 10.93 | a | 10.04 | a | 20.35 | e | 30.25 | b | 36.71 | 41.10 | a | 47.61 | 43.39 | 33.53 | 30.65 | 2.33 | 16.87 | 26.98 | ||||||||
1986 | 27.39 | 10.48 | a | 30.40 | a | 28.68 | b | 36.93 | b | 45.93 | 45.32 | 45.13 | 37.07 | a | 34.90 | 20.48 | a | 21.82 | c | 32.04 | ||||||
1987 | 18.38 | b | 23.86 | 22.60 | a | 32.40 | 39.16 | 46.07 | a | 46.42 | 42.07 | a | 39.60 | 33.71 | 30.50 | b | 19.33 | a | 32.84 | |||||||
1988 | 10.23 | a | 17.74 | b | 25.57 | a | 31.43 | 39.06 | 46.60 | 47.00 | 46.03 | 39.73 | 34.07 | b | 25.73 | 19.52 | 31.89 | |||||||||
1989 | 16.74 | 1.68 | 19.42 | 28.34 | a | 34.94 | 42.40 | 46.32 | 44.65 | 38.80 | 33.32 | 26.00 | d | 19.90 | 29.38 | |||||||||||
1990 | 20.28 | b | 13.18 | 19.77 | 29.27 | 34.68 | 40.30 | 43.90 | a | 47.96 | d | 39.83 | a | 31.62 | b | 24.83 | a | 5.37 | a | 29.25 | ||||||
1991 | 6.73 | a | 26.22 | e | 19.87 | 28.60 | e | 36.93 | d | 41.15 | j | 48.04 | c | 48.10 | a | 38.27 | 30.24 | b | 23.54 | b | 24.75 | c | 30.12 | a | ||
1992 | 24.90 | 25.23 | c | 25.63 | a | 30.25 | b | 36.72 | b | 45.18 | b | 44.32 | c | 42.69 | b | 40.24 | e | 35.10 | b | 26.93 | a | 5.03 | a | 31.85 | ||
1993 | 6.79 | b | 10.46 | 25.87 | a | 32.27 | 38.52 | b | 41.04 | c | 43.63 | a | 43.59 | b | 38.90 | 32.00 | k | 19.40 | 24.97 | b | 29.58 | a | ||||
1994 | 17.83 | b | 6.04 | 25.97 | 30.04 | b | 37.90 | 41.73 | d | 47.26 | 45.61 | c | 39.86 | b | 34.16 | 20.90 | 19.81 | 30.59 | ||||||||
1995 | 17.42 | 17.15 | b | 18.38 | b | 27.26 | c | 32.00 | b | 40.19 | d | 47.68 | f | 44.86 | i | 40.14 | b | 32.40 | a | 23.44 | c | 16.45 | 26.48 | b | ||
1996 | 1.65 | 17.36 | d | 16.21 | b | 32.03 | a | 35.16 | f | 42.20 | e | 48.13 | 45.87 | 37.40 | 31.33 | a | 12.48 | a | 6.35 | 26.46 | a | |||||
1997 | 9.03 | 19.12 | b | 21.00 | a | 24.67 | 35.58 | 43.43 | 47.58 | 45.55 | 42.69 | a | 35.38 | b | 25.30 | 22.13 | a | 30.95 | ||||||||
1998 | 11.52 | 20.61 | 20.32 | 29.54 | b | 34.96 | c | ----- | z | 51.17 | h | 43.46 | g | 40.79 | f | 32.08 | f | 26.76 | a | 12.92 | e | 22.38 | e | |||
1999 | 16.89 | c | 24.58 | d | 23.23 | e | 27.82 | b | 34.22 | d | 41.38 | a | 42.48 | b | 47.86 | c | 35.25 | b | 33.59 | d | 31.00 | b | 25.39 | h | 32.57 | a |
2000 | 14.38 | b | 18.00 | 26.27 | a | 30.79 | a | 38.21 | b | 42.15 | d | 47.13 | 46.90 | a | 39.04 | e | 32.57 | a | 18.75 | b | 12.66 | b | 30.57 | |||
2001 | 21.33 | a | 7.92 | b | 24.07 | b | 28.55 | a | 39.04 | c | 42.11 | b | 47.55 | b | 48.16 | 41.59 | a | 33.32 | 30.24 | a | 18.76 | b | 31.89 | |||
2002 | 17.19 | 20.37 | a | 8.45 | 22.96 | c | 33.82 | c | 41.67 | 50.86 | c | 43.89 | d | 36.93 | o | 20.63 | l | 27.29 | i | 23.19 | j | 29.90 | d | |||
2003 | 15.89 | l | 16.71 | k | 16.50 | q | 20.48 | e | ----- | z | ----- | z | 49.52 | 44.87 | 35.90 | ----- | z | ----- | z | 18.83 | m | 37.69 | h | |||
2004 | 12.11 | c | 20.97 | 28.52 | 30.50 | 33.68 | 40.80 | 48.20 | a | 46.16 | 41.10 | 33.42 | 27.93 | a | 17.68 | f | 33.03 | a | ||||||||
2005 | 9.16 | 16.68 | 21.67 | v | 27.43 | b | 33.89 | d | 39.41 | c | 47.04 | g | 42.97 | 36.36 | e | 33.03 | b | 28.17 | 14.70 | u | 29.68 | c | ||||
2006 | 26.11 | m | 15.22 | e | 11.93 | q | 30.86 | p | 32.73 | t | 42.87 | g | 48.73 | i | 43.89 | l | ----- | z | 28.33 | m | 23.46 | q | 17.44 | v | 15.22 | k |
2007 | 12.90 | k | 11.36 | f | 24.67 | s | 23.69 | n | 34.63 | l | 42.04 | f | 51.25 | c | 43.96 | c | 37.39 | l | 32.92 | f | 20.09 | g | 14.47 | l | 47.61 | j |
2008 | 10.60 | u | ----- | z | 20.84 | f | 24.26 | k | 35.48 | d | 38.15 | d | ----- | z | ----- | z | ----- | z | 31.35 | e | 28.34 | a | 3.13 | h | 33.33 | h |
2009 | 7.14 | i | 13.40 | r | 13.00 | g | 23.15 | c | 34.38 | g | 35.86 | i | 45.43 | j | 40.72 | f | 36.65 | m | 27.33 | g | 28.92 | e | 2.84 | 18.30 | i | |
2010 | 14.45 | b | 16.86 | 25.68 | c | 26.97 | 30.93 | c | 41.81 | c | 45.17 | a | 44.13 | 38.29 | b | 38.00 | f | 16.68 | b | 12.60 | a | 28.50 | a | |||
2011 | 6.77 | a | ----- | z | 18.18 | c | 22.38 | a | 33.50 | a | 42.79 | b | 46.97 | b | 45.57 | a | 40.10 | 33.83 | a | 22.67 | c | 18.73 | a | 30.13 | a | |
2012 | 15.35 | 11.34 | 22.23 | a | 29.86 | a | 34.57 | a | 43.10 | 47.32 | 42.77 | 34.95 | j | 27.39 | 25.30 | 16.00 | 28.66 | a | ||||||||
2013 | 15.70 | a | 20.07 | 14.81 | 21.37 | 36.42 | 43.00 | 46.26 | 47.61 | 41.00 | 28.39 | 21.73 | 10.48 | 28.90 | ||||||||||||
2014 | 14.29 | 1.04 | 11.93 | a | 26.00 | ----- | z | 40.27 | 48.48 | 47.16 | 37.27 | 39.81 | 12.36 | b | 20.35 | 27.18 | a | |||||||||
2015 | 19.68 | 18.04 | 28.90 | 28.20 | 32.93 | d | 43.94 | n | 46.84 | 44.97 | 39.77 | 37.48 | ----- | z | ----- | z | 32.98 | c | ||||||||
2016 | ----- | z | ----- | z | ----- | z | 32.48 | e | 36.23 | a | 44.00 | l | 48.23 | 45.16 | 41.37 | 34.08 | r | 33.68 | b | 5.90 | 34.72 | e | ||||
2017 | 5.62 | e | 12.68 | 20.23 | e | ----- | z | ----- | z | ----- | z | 47.61 | c | 46.19 | 41.23 | ----- | z | ----- | z | ----- | z | 28.93 | f | |||
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | 34.90 | 41.00 | i | ----- | z | ----- | z | ----- | z | ----- | z | 13.60 | e | 6.00 | 18.17 | i | ||
2023 | 21.06 | 15.21 | 3.95 | j | ----- | z | 42.29 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.14 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 14.23 | 16.11 | 21.57 | 27.90 | 35.59 | 42.10 | 46.99 | 45.66 | 38.96 | 32.97 | 23.25 | 13.98 | 30.29 | |||||||||||||
S.D. | 6.84 | 6.98 | 5.17 | 3.38 | 2.11 | 2.02 | 1.88 | 1.91 | 2.13 | 2.83 | 6.61 | 7.67 | 1.89 | |||||||||||||
SKEW | -0.50 | -0.36 | -0.55 | -0.68 | -0.06 | 0.57 | -0.15 | -0.11 | -0.65 | -0.03 | -1.14 | -0.63 | -0.70 | |||||||||||||
MAX | 27.39 | 27.50 | 30.40 | 32.48 | 39.16 | 46.60 | 51.25 | 49.00 | 42.69 | 39.81 | 33.68 | 24.97 | 32.84 | |||||||||||||
MIN | -3.60 | 1.04 | 8.45 | 20.48 | 30.93 | 38.15 | 42.48 | 42.07 | 33.53 | 27.06 | 2.33 | -4.72 | 26.54 | |||||||||||||
YRS | 31 | 31 | 28 | 32 | 31 | 28 | 31 | 32 | 30 | 27 | 32 | 28 | 14 |