YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1977 | ----- | z | ----- | z | ----- | z | ----- | z | 50.96 | f | 66.72 | a | 68.08 | 65.63 | 57.14 | b | 45.82 | a | 34.20 | 27.58 | 52.17 | e | ||||
1978 | 22.65 | 23.60 | b | 31.46 | c | 43.98 | b | 47.69 | b | 60.05 | 66.76 | 64.07 | d | 56.10 | a | 44.79 | c | 30.50 | a | 12.93 | a | 42.05 | ||||
1979 | 10.12 | c | 21.35 | a | 30.66 | 42.39 | b | 50.16 | 59.75 | b | 67.97 | 64.65 | 61.07 | 46.94 | 24.85 | 20.77 | 41.72 | |||||||||
1980 | 21.97 | 25.38 | 29.89 | 40.37 | 50.37 | 61.77 | 68.63 | 64.76 | 57.22 | a | 44.58 | a | 34.32 | 31.42 | 44.22 | |||||||||||
1981 | 29.56 | 27.43 | a | 35.15 | 46.62 | 49.90 | 62.14 | a | 67.42 | 66.35 | a | 60.23 | 42.24 | 34.68 | 24.13 | 45.49 | ||||||||||
1982 | 14.85 | a | 20.48 | a | 33.38 | a | 36.79 | a | 48.39 | 58.24 | a | 66.15 | a | 67.63 | 55.97 | 40.78 | a | 27.82 | b | 21.35 | a | 40.99 | ||||
1983 | 22.81 | b | 24.45 | 32.84 | 36.50 | 46.66 | 57.33 | 65.94 | 68.95 | 58.23 | 45.92 | 31.30 | 17.87 | a | 42.40 | |||||||||||
1984 | 9.02 | 15.72 | 26.29 | 35.22 | 52.45 | 56.55 | 66.45 | 65.24 | 54.95 | a | 38.92 | a | 31.25 | 18.92 | 39.25 | |||||||||||
1985 | 13.16 | c | 12.52 | 30.47 | a | 44.40 | a | 52.69 | 61.10 | 68.10 | a | 65.50 | a | 53.58 | 43.82 | 30.26 | a | 17.57 | a | 41.10 | ||||||
1986 | 20.82 | 28.14 | 39.61 | 42.89 | c | 49.87 | 63.17 | 64.98 | 66.03 | 53.52 | 43.68 | 32.52 | 25.42 | a | 44.22 | |||||||||||
1987 | 17.42 | a | 26.89 | a | 30.61 | 45.13 | 52.92 | 61.52 | 64.97 | 63.06 | 57.33 | 47.56 | 33.17 | 20.29 | 43.41 | |||||||||||
1988 | 13.25 | c | 21.17 | 30.08 | 44.98 | 51.87 | 65.28 | 69.58 | a | 67.61 | 55.48 | 50.50 | a | 32.66 | a | 18.95 | 43.45 | |||||||||
1989 | 15.06 | 12.52 | b | 35.98 | 47.07 | 53.11 | 59.85 | 70.08 | a | 64.89 | 57.21 | a | 45.94 | 35.08 | 18.95 | 42.98 | ||||||||||
1990 | 22.28 | a | 19.95 | 36.72 | a | 47.12 | 50.13 | 62.12 | a | 67.50 | 66.00 | 62.30 | 45.85 | a | 34.38 | b | 14.92 | 44.10 | ||||||||
1991 | 14.94 | 25.66 | 32.69 | 41.62 | 51.89 | 60.80 | 66.55 | 66.68 | 57.70 | 45.95 | 28.91 | a | 15.84 | 42.44 | ||||||||||||
1992 | 14.55 | 27.18 | a | 38.63 | 47.91 | a | 56.02 | 60.17 | 63.65 | 65.65 | a | 56.80 | c | 48.39 | c | 26.80 | 18.00 | 43.64 | ||||||||
1993 | 19.34 | 19.70 | a | 33.37 | 39.22 | 53.46 | c | 58.42 | 63.33 | a | 63.61 | 55.25 | 44.72 | b | 25.80 | 21.56 | d | 41.48 | ||||||||
1994 | 22.22 | a | 21.39 | a | 37.48 | b | 43.13 | d | 55.95 | k | 63.57 | h | 67.83 | k | 67.65 | h | 58.26 | i | 45.70 | k | 26.38 | j | 22.32 | k | 31.06 | h |
1995 | 22.26 | j | 31.24 | i | 35.98 | i | 41.13 | k | ----- | z | 58.64 | h | 64.33 | k | 67.34 | i | 56.50 | j | 44.42 | k | 36.27 | j | 31.50 | m | ----- | z |
1996 | 20.61 | i | 21.48 | i | 33.31 | j | 44.17 | j | 53.77 | i | 62.25 | j | 67.24 | j | 66.75 | i | 54.29 | k | 43.39 | i | 35.68 | k | 25.39 | m | ----- | z |
1997 | 18.55 | i | 20.82 | i | 35.75 | k | 37.55 | i | 52.24 | j | 60.95 | k | 65.77 | i | 64.14 | j | 59.14 | i | 46.33 | h | 33.22 | n | 21.12 | k | ----- | z |
1998 | 23.40 | k | 27.37 | i | 30.41 | i | 42.17 | i | 52.76 | l | 55.02 | i | 69.89 | i | 66.40 | j | 62.15 | j | 47.80 | i | 35.29 | k | 23.81 | m | ----- | z |
1999 | 28.07 | k | 26.21 | i | 40.00 | h | 42.40 | i | 47.42 | k | 59.34 | h | 67.62 | j | 65.93 | j | 53.71 | i | 48.83 | j | 40.00 | l | 23.45 | k | ----- | z |
2000 | 27.52 | j | 33.17 | i | 36.96 | h | 47.82 | k | 54.05 | i | 62.64 | h | 69.21 | l | 69.57 | i | 58.10 | j | 47.00 | h | 20.93 | j | 19.53 | l | ----- | z |
2001 | 14.23 | i | 23.17 | j | 34.20 | i | 45.55 | i | 52.14 | i | 60.62 | j | 69.83 | j | 67.91 | h | 60.68 | k | 47.48 | a | 36.93 | a | 19.40 | a | 34.60 | i |
2002 | 18.30 | c | 18.83 | b | 24.80 | f | 46.36 | a | 51.66 | b | 65.21 | b | 71.65 | 65.52 | b | 58.48 | e | 43.81 | 30.43 | c | 26.25 | a | 45.14 | a | ||
2003 | 24.66 | c | 24.70 | e | 34.50 | c | 43.70 | h | 50.81 | b | 60.00 | c | 71.98 | a | 67.71 | c | 54.20 | b | 49.43 | a | 26.29 | b | 22.33 | d | 44.24 | a |
2004 | 18.92 | a | 20.52 | 39.11 | 45.29 | b | 50.00 | e | 60.25 | 66.02 | a | 64.16 | c | 56.52 | b | 45.80 | f | 32.54 | c | 22.95 | b | 43.30 | a | |||
2005 | 29.26 | 26.38 | b | 34.77 | 42.48 | a | 51.18 | 57.38 | 68.00 | 64.77 | 55.33 | 47.31 | b | 34.63 | 21.32 | 44.40 | ||||||||||
2006 | 24.44 | 21.39 | 31.97 | 45.32 | 54.40 | 64.25 | 70.39 | 65.15 | 52.03 | 41.48 | b | 33.20 | 19.16 | 43.60 | ||||||||||||
2007 | 9.66 | 25.21 | 35.63 | 42.97 | 51.12 | c | 62.17 | 71.21 | 68.69 | 58.23 | 45.66 | 35.40 | 16.87 | 43.57 | ||||||||||||
2008 | 13.60 | 21.09 | 26.73 | 36.45 | 49.09 | c | 57.78 | 68.66 | 66.45 | 55.78 | 45.40 | 36.22 | 21.92 | 41.60 | ||||||||||||
2009 | 18.92 | 26.93 | 33.03 | 39.15 | 52.65 | 57.50 | 66.42 | 64.34 | 58.67 | 40.22 | b | 30.69 | a | 14.32 | a | 41.90 | ||||||||||
2010 | 18.28 | a | 18.54 | 32.52 | c | 40.45 | 46.68 | 60.72 | a | 67.47 | 65.11 | 58.55 | 47.58 | 30.93 | 25.11 | 42.66 | ||||||||||
2011 | 14.85 | 15.30 | 32.18 | 39.12 | 46.68 | 58.77 | 67.00 | 68.03 | 58.25 | 45.40 | 31.45 | 20.52 | 41.46 | |||||||||||||
2012 | 24.13 | 25.79 | 38.55 | 46.58 | 54.31 | 66.43 | 70.63 | 68.45 | 58.78 | 44.85 | 37.53 | 20.68 | 46.39 | |||||||||||||
2013 | 9.52 | 19.20 | 31.00 | 36.60 | 52.27 | 63.35 | 70.65 | 67.40 | 59.47 | 42.15 | 31.52 | 15.19 | 41.53 | |||||||||||||
2014 | 18.16 | 26.46 | 36.26 | 40.87 | 51.15 | 59.67 | 69.58 | 64.15 | 58.67 | 47.61 | 30.40 | 25.90 | 44.07 | |||||||||||||
2015 | 21.79 | 31.46 | 38.37 | 43.50 | c | 49.26 | 64.68 | 66.15 | 66.50 | 60.12 | 51.21 | 31.77 | 16.55 | 45.11 | ||||||||||||
2016 | 14.35 | 21.71 | 33.61 | 42.70 | 49.55 | 64.87 | 68.38 | a | 64.66 | 57.27 | 49.34 | 37.87 | 19.65 | 43.66 | ||||||||||||
2017 | 17.35 | 30.48 | 39.53 | 41.87 | 49.58 | 62.98 | 70.10 | 66.11 | 58.05 | 41.65 | 38.70 | 24.40 | 45.07 | |||||||||||||
2018 | 23.93 | a | 25.93 | 34.65 | 43.56 | c | 53.90 | 64.13 | 71.40 | b | 66.58 | 61.02 | 43.98 | 29.20 | 20.15 | 44.87 | ||||||||||
2019 | 16.85 | 19.41 | 27.18 | a | 43.57 | 46.77 | 57.85 | 68.39 | 67.55 | 60.23 | 35.90 | 31.95 | 20.16 | 41.32 | ||||||||||||
2020 | 19.39 | 15.14 | 33.47 | 40.37 | 53.29 | 61.13 | 67.84 | 70.52 | 56.73 | 42.97 | 34.15 | 19.42 | 42.87 | |||||||||||||
2021 | 18.82 | 22.93 | 32.47 | 40.13 | 52.45 | 66.00 | a | 72.19 | 66.63 | 60.23 | 44.87 | 38.20 | 25.58 | 45.04 | ||||||||||||
2022 | 16.85 | 15.68 | 28.73 | 40.74 | a | 48.76 | 61.42 | 69.97 | 68.74 | 61.23 | 44.29 | 26.65 | 16.27 | 41.61 | ||||||||||||
2023 | 18.48 | 13.96 | a | 22.10 | 36.27 | 54.15 | 58.27 | 69.24 | 67.21 | 58.18 | 45.65 | 32.98 | 23.18 | 41.64 | ||||||||||||
2024 | 21.79 | 25.05 | 32.47 | 41.25 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.44 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 18.41 | 22.14 | 33.18 | 42.10 | 50.98 | 61.28 | 68.19 | 66.17 | 57.59 | 44.99 | 32.20 | 20.59 | 43.01 | |||||||||||||
S.D. | 4.98 | 4.81 | 3.93 | 3.46 | 2.39 | 2.82 | 2.25 | 1.68 | 2.33 | 3.12 | 3.50 | 3.95 | 1.58 | |||||||||||||
SKEW | 0.09 | -0.27 | -0.44 | -0.29 | -0.15 | 0.25 | -0.11 | 0.41 | -0.20 | -0.52 | -0.16 | 0.41 | -0.00 | |||||||||||||
MAX | 29.56 | 31.46 | 39.61 | 47.91 | 56.02 | 66.72 | 72.19 | 70.52 | 62.30 | 51.21 | 38.70 | 31.42 | 46.39 | |||||||||||||
MIN | 9.02 | 12.52 | 22.10 | 35.22 | 46.66 | 56.55 | 63.33 | 63.06 | 52.03 | 35.90 | 24.85 | 12.93 | 39.25 | |||||||||||||
YRS | 40 | 40 | 39 | 38 | 38 | 39 | 39 | 39 | 39 | 39 | 40 | 40 | 35 |