YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1986 | ----- | z | ----- | z | ----- | z | 31.80 | 37.24 | b | 49.14 | a | 49.50 | a | 52.69 | b | 38.86 | b | 31.03 | b | 23.72 | a | 13.07 | a | 36.34 | c | |
1987 | 10.90 | b | 20.23 | b | 26.23 | 32.48 | a | 41.59 | b | 47.77 | 49.58 | 46.93 | a | 40.23 | 33.00 | a | 25.80 | 15.93 | a | 32.56 | ||||||
1988 | 13.16 | 21.43 | a | 25.30 | a | 31.76 | a | 36.47 | a | 49.13 | 53.03 | b | 48.55 | 40.03 | 35.81 | 24.17 | a | 14.65 | 32.79 | |||||||
1989 | 7.19 | 12.00 | a | 30.20 | a | 34.27 | 36.97 | 44.45 | a | 54.50 | a | 48.61 | 40.32 | b | 33.06 | 22.14 | a | 18.71 | 31.87 | |||||||
1990 | 15.97 | a | 13.63 | a | ----- | z | 35.03 | a | 36.17 | a | 44.93 | 52.17 | a | 49.93 | b | 45.70 | 31.40 | a | 24.10 | a | 3.07 | c | 32.01 | a | ||
1991 | 13.03 | a | 25.52 | a | 25.77 | 28.76 | a | 36.17 | b | 40.77 | 52.13 | 52.26 | 41.79 | b | 29.50 | c | 23.96 | c | 14.62 | g | 33.61 | a | ||||
1992 | 14.61 | c | 24.85 | b | 27.33 | d | 33.17 | 40.45 | 46.34 | a | 46.93 | c | 49.39 | 39.37 | 34.83 | a | 20.89 | c | 10.57 | c | 32.39 | |||||
1993 | 7.17 | a | 12.05 | f | 26.93 | a | 30.40 | 40.15 | d | 42.04 | e | 42.61 | c | 45.40 | a | 38.00 | a | 31.66 | b | 14.07 | a | 15.00 | b | 30.31 | a | |
1994 | 18.28 | b | 15.11 | a | 22.97 | a | 31.85 | c | 40.00 | 44.97 | a | 51.43 | c | 50.52 | d | 41.33 | c | 31.58 | 17.10 | 20.00 | a | 32.09 | ||||
1995 | 20.55 | 23.23 | b | 25.14 | b | 29.07 | a | 37.13 | a | 43.03 | 49.16 | 47.61 | 41.90 | a | 27.70 | a | 28.17 | 22.25 | c | 32.91 | ||||||
1996 | 20.40 | a | 19.21 | 26.74 | 30.93 | a | 36.48 | b | 44.67 | 51.65 | 48.90 | 38.60 | 29.58 | 24.10 | a | 19.76 | b | 32.59 | ||||||||
1997 | 17.45 | 19.85 | b | 26.61 | 29.07 | 38.71 | 46.14 | b | 50.33 | a | 50.61 | 45.82 | b | 29.80 | a | 24.32 | b | 14.94 | 32.80 | |||||||
1998 | 22.77 | a | 21.81 | b | ----- | z | 28.93 | 38.23 | a | 42.30 | 53.74 | 51.77 | 47.69 | a | 30.00 | b | 27.33 | 15.03 | b | 34.51 | a | |||||
1999 | 20.39 | 21.20 | c | 24.07 | a | 27.03 | 36.11 | d | 43.58 | f | 50.44 | f | 51.95 | j | 37.70 | g | 29.57 | h | 24.15 | j | 12.74 | h | 25.76 | g | ||
2000 | 20.96 | e | 26.21 | e | 23.21 | c | 33.11 | c | 40.20 | f | 46.03 | 50.52 | 52.21 | b | 39.04 | f | 29.55 | i | 15.68 | k | 17.86 | b | 33.76 | d | ||
2001 | 12.60 | f | 17.88 | c | 26.85 | d | 29.36 | b | 38.74 | h | 43.52 | i | 52.95 | i | 52.68 | i | 41.95 | h | 29.26 | h | 23.11 | k | 15.15 | d | 22.31 | h |
2002 | 16.00 | f | 11.10 | h | 23.38 | j | 30.89 | c | 36.25 | c | 45.97 | 55.30 | a | 45.92 | f | 41.40 | e | 23.91 | h | 22.08 | d | 19.38 | e | 35.90 | e | |
2003 | 21.12 | e | 15.44 | j | 25.58 | g | 30.08 | f | 36.14 | q | 45.07 | o | 54.50 | k | 55.00 | g | 44.40 | j | 35.39 | c | 20.87 | g | 22.00 | k | 28.25 | j |
2004 | 14.80 | k | 15.19 | h | 27.12 | f | 32.24 | i | 36.79 | g | 44.59 | c | 52.48 | f | 50.54 | g | 39.58 | d | 32.70 | k | 20.95 | j | 17.06 | o | 42.08 | j |
2005 | 13.11 | m | 11.53 | i | 25.61 | h | 28.00 | l | 39.20 | f | 39.61 | b | 51.27 | p | 48.60 | f | 37.41 | c | 30.70 | a | 23.83 | a | 18.39 | c | 29.99 | g |
2006 | 21.26 | d | 18.12 | b | 24.78 | d | 32.86 | a | 39.67 | y | 47.27 | 56.82 | t | 47.73 | a | 38.48 | a | 32.23 | e | ----- | z | 16.38 | b | 31.01 | c | |
2007 | 11.52 | d | 25.93 | 26.65 | e | 31.22 | c | 39.48 | 45.63 | 57.21 | b | 47.27 | e | 35.15 | c | 26.45 | b | 14.88 | e | 11.46 | e | 31.07 | ||||
2008 | 11.29 | g | 19.15 | b | 25.47 | a | 26.14 | a | 41.67 | y | 38.77 | 46.07 | b | 45.77 | 34.45 | a | 26.71 | 27.13 | 12.48 | 30.21 | b | |||||
2009 | 17.25 | k | 16.43 | 22.03 | a | 26.23 | 34.50 | k | 44.39 | b | 46.17 | g | 42.19 | e | 37.18 | b | 26.13 | 15.93 | 4.65 | 26.13 | c | |||||
2010 | 16.22 | d | 13.18 | 13.93 | a | 21.15 | q | 24.37 | d | 40.33 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.93 | h | |
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.42 | ----- | z | ----- | z | ----- | z | ----- | z | 13.59 | n | 50.42 | k | |
2012 | 15.20 | k | 16.88 | d | 22.74 | 28.86 | a | 32.73 | a | 40.24 | a | 50.81 | j | 47.29 | 37.17 | 26.32 | 24.80 | 17.17 | a | 29.42 | b | |||||
2013 | -1.48 | f | 17.43 | 23.15 | d | 27.07 | p | 31.43 | c | 42.03 | 52.43 | a | 44.64 | t | 42.25 | b | 23.42 | 19.10 | 9.65 | 28.99 | c | |||||
2014 | 14.87 | 23.46 | 23.06 | 26.79 | a | 34.57 | a | 40.50 | 51.08 | f | 49.74 | 32.89 | b | 24.35 | 17.97 | 20.03 | 28.02 | a | ||||||||
2015 | 19.00 | 19.96 | 20.71 | 25.52 | c | 43.00 | b | 46.73 | 51.94 | 44.39 | 36.57 | 32.84 | 18.34 | a | 17.80 | a | 31.40 | |||||||||
2016 | 9.93 | a | 20.69 | 27.16 | 30.73 | 36.39 | 46.58 | d | 45.03 | 42.03 | 38.00 | c | 32.00 | d | 23.67 | 11.45 | 30.31 | |||||||||
2017 | 5.97 | 22.96 | 27.68 | 29.12 | d | 33.20 | a | 43.53 | 50.29 | 47.45 | 38.43 | 23.81 | 24.20 | 8.81 | 29.62 | |||||||||||
2018 | 20.81 | 14.50 | 23.19 | 26.53 | 36.71 | 42.10 | 50.35 | 45.32 | 34.93 | 28.13 | 15.17 | 11.23 | 29.08 | |||||||||||||
2019 | 12.71 | 17.93 | 22.67 | a | 31.63 | 33.97 | 39.60 | 48.45 | 45.81 | 40.40 | 22.19 | 18.82 | b | 17.26 | 29.29 | |||||||||||
2020 | 16.95 | l | 16.12 | d | 22.52 | 24.67 | 34.06 | 40.27 | 45.55 | 47.52 | 36.40 | 23.74 | 18.40 | 8.61 | 28.90 | a | ||||||||||
2021 | 14.45 | 19.29 | 18.43 | a | 22.13 | 33.65 | 45.77 | 52.65 | 45.32 | 35.07 | 33.03 | 23.20 | 14.16 | 29.76 | ||||||||||||
2022 | 11.65 | 15.21 | 24.26 | 21.50 | 31.84 | 37.60 | 49.81 | 51.06 | 40.73 | 24.87 | 10.90 | 13.58 | 27.75 | |||||||||||||
2023 | 12.77 | 9.64 | 15.58 | 21.63 | 36.68 | 39.66 | a | 49.03 | 50.10 | 39.10 | 30.10 | 17.50 | 17.06 | 28.24 | ||||||||||||
2024 | 17.39 | 20.52 | 21.93 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.94 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 15.45 | 19.05 | 23.98 | 29.17 | 36.21 | 43.71 | 50.42 | 48.08 | 39.23 | 29.40 | 21.19 | 14.55 | 30.97 | |||||||||||||
S.D. | 4.78 | 4.14 | 3.45 | 3.55 | 3.63 | 3.10 | 3.21 | 2.84 | 3.32 | 3.78 | 4.40 | 4.49 | 1.73 | |||||||||||||
SKEW | -0.30 | -0.18 | -1.11 | -0.60 | -0.95 | -0.16 | -0.34 | -0.31 | 0.54 | -0.24 | -0.47 | -0.68 | -0.46 | |||||||||||||
MAX | 22.77 | 26.21 | 30.20 | 35.03 | 43.00 | 49.14 | 57.21 | 52.69 | 47.69 | 35.81 | 28.17 | 22.25 | 32.91 | |||||||||||||
MIN | 5.97 | 9.64 | 13.93 | 21.50 | 24.37 | 37.60 | 42.61 | 42.03 | 32.89 | 22.19 | 10.90 | 3.07 | 27.75 | |||||||||||||
YRS | 28 | 32 | 31 | 32 | 29 | 33 | 28 | 29 | 32 | 31 | 30 | 32 | 17 |