YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.97 | 31.70 | 30.87 | 34.85 | i | |||
1981 | 26.42 | 26.68 | 29.48 | 41.70 | 44.00 | 57.67 | 60.71 | 57.33 | a | 55.80 | 39.55 | 32.87 | 23.23 | 41.29 | ||||||||||||
1982 | 16.67 | a | 19.65 | b | 28.67 | a | 31.80 | 43.48 | 51.24 | a | 59.13 | 60.68 | 53.27 | 36.35 | 27.93 | a | 21.47 | a | 37.53 | |||||||
1983 | 21.81 | 27.04 | 31.18 | c | 33.17 | a | 42.47 | a | 52.73 | 60.00 | 61.32 | ----- | z | 44.13 | 29.97 | 21.35 | 38.65 | a | ||||||||
1984 | 15.74 | 20.86 | a | 28.83 | a | 32.93 | a | 50.60 | a | 52.97 | 61.90 | 61.23 | a | 51.96 | b | 34.58 | 29.30 | 20.45 | b | 38.45 | ||||||
1985 | 17.24 | b | 18.07 | 28.48 | 40.03 | 48.40 | a | 58.33 | 60.68 | 62.52 | 48.47 | 41.29 | 28.89 | b | 23.16 | 39.63 | ||||||||||
1986 | 25.45 | b | 28.15 | a | 36.68 | 37.30 | 45.42 | 59.20 | 61.13 | 61.58 | 49.40 | 37.32 | 29.86 | b | 21.67 | a | 41.10 | |||||||||
1987 | 17.14 | b | 24.07 | 25.87 | 39.40 | 45.03 | a | 56.90 | 57.62 | e | 56.27 | a | 51.77 | 46.03 | 28.53 | 18.39 | 38.92 | |||||||||
1988 | 14.97 | a | 24.66 | 26.70 | a | 39.04 | b | 44.52 | 58.34 | a | 63.57 | a | 59.32 | 51.27 | 46.74 | 28.38 | a | 18.72 | b | 39.68 | ||||||
1989 | 13.10 | b | 18.39 | 34.72 | b | 42.83 | 47.10 | a | 54.90 | 62.35 | 59.06 | 54.93 | 42.00 | 33.45 | a | 23.66 | b | 40.54 | ||||||||
1990 | 20.28 | b | 23.32 | 35.19 | 41.80 | 46.27 | a | 60.54 | b | 61.90 | b | 61.65 | 57.23 | 41.71 | 30.50 | 14.10 | 41.21 | |||||||||
1991 | 15.94 | 27.75 | 28.79 | b | 34.37 | 44.19 | 56.52 | a | 62.35 | 60.81 | 52.61 | b | 44.23 | 28.79 | a | 17.10 | b | 39.45 | ||||||||
1992 | 17.17 | a | 28.69 | 34.47 | a | 44.73 | 48.58 | 54.63 | 60.23 | a | 60.61 | 55.00 | 47.93 | a | 26.21 | a | 18.42 | 41.39 | ||||||||
1993 | 23.26 | 26.21 | 34.48 | 37.43 | b | 49.68 | 56.24 | a | 63.00 | 61.39 | 55.20 | 42.70 | a | 27.50 | 23.10 | 41.68 | ||||||||||
1994 | 25.55 | 24.26 | a | 36.55 | 36.79 | b | 50.65 | 64.63 | 67.03 | 66.19 | 55.57 | 42.61 | 27.59 | a | 25.06 | 43.54 | ||||||||||
1995 | 24.60 | a | 34.71 | 34.17 | a | 34.40 | 41.87 | a | 52.83 | 62.97 | 66.03 | 56.21 | b | 42.10 | b | 36.13 | 28.58 | 42.88 | ||||||||
1996 | 24.07 | b | 31.64 | a | ----- | z | 38.23 | 51.13 | a | 61.67 | 67.23 | 65.19 | 52.43 | 42.24 | b | 33.10 | a | 24.52 | b | 44.68 | a | |||||
1997 | 23.43 | a | 24.37 | a | 36.60 | a | 35.52 | a | 51.37 | a | 60.33 | 63.65 | 62.42 | 55.77 | 43.58 | 32.23 | 22.29 | 42.63 | ||||||||
1998 | 27.48 | b | 26.93 | a | 32.10 | a | 35.90 | a | 49.57 | a | 54.67 | 67.06 | 65.94 | 58.07 | b | 42.97 | a | 32.72 | a | 22.47 | a | 42.99 | ||||
1999 | 28.17 | a | 27.88 | b | 38.16 | 34.21 | b | 45.71 | 58.38 | a | 64.48 | 61.58 | 53.97 | a | 46.74 | 37.80 | 24.30 | a | 43.45 | |||||||
2000 | 28.29 | 30.93 | 33.35 | 43.93 | a | 53.07 | b | 60.00 | 67.48 | 65.97 | a | 56.30 | 45.45 | 24.38 | a | 26.23 | 44.62 | |||||||||
2001 | 23.03 | 26.85 | a | 34.55 | 40.25 | b | 51.84 | 61.43 | 65.71 | 64.00 | 60.77 | 48.00 | b | 36.36 | b | 21.70 | a | 44.54 | ||||||||
2002 | 20.87 | a | 23.54 | 29.77 | a | 45.25 | b | 50.28 | b | 65.07 | b | 68.53 | a | 64.94 | 55.73 | 42.03 | b | 31.24 | a | 25.77 | 43.58 | |||||
2003 | 30.84 | 26.30 | a | 33.35 | 39.50 | d | 52.17 | a | 59.64 | b | 71.16 | 65.87 | a | 57.39 | b | 50.45 | b | 30.55 | a | 25.10 | a | 45.19 | ||||
2004 | 21.10 | a | 23.69 | 40.68 | 40.38 | a | 51.42 | 60.40 | 65.81 | 62.87 | 55.34 | a | 44.55 | b | 31.03 | 24.10 | a | 43.45 | ||||||||
2005 | 29.21 | b | 29.54 | 32.48 | b | 40.25 | b | 50.03 | a | 56.30 | 68.39 | 60.97 | 55.29 | b | 44.89 | c | 33.68 | b | 23.77 | a | 43.73 | |||||
2006 | 24.77 | 25.23 | b | 31.55 | 42.96 | c | 53.73 | a | 63.29 | b | 67.30 | a | 61.63 | a | 50.52 | a | 40.86 | b | 33.93 | a | 23.13 | a | 43.24 | |||
2007 | 19.73 | a | 28.57 | 36.32 | 40.96 | c | 51.71 | 62.03 | a | 68.03 | 65.35 | 56.10 | a | 41.19 | 36.03 | 19.94 | 43.83 | |||||||||
2008 | 18.00 | a | 25.38 | 31.13 | 34.52 | c | 44.63 | a | 58.13 | 66.16 | 63.13 | 55.45 | a | 45.23 | 34.43 | 21.03 | 41.44 | |||||||||
2009 | 23.29 | 28.14 | 30.71 | 35.63 | 50.61 | c | 55.50 | 66.61 | c | 63.10 | b | 56.66 | a | 36.30 | a | 33.40 | 15.70 | a | 41.30 | |||||||
2010 | 19.10 | 21.18 | 28.58 | 36.43 | 41.19 | 58.70 | 64.13 | 59.83 | a | 57.41 | a | 43.32 | 28.17 | 27.30 | a | 40.45 | ||||||||||
2011 | 17.90 | 20.39 | 31.81 | 33.90 | a | 40.73 | a | 57.47 | 63.87 | 65.10 | a | 55.48 | a | 42.77 | 30.33 | 20.10 | 39.99 | |||||||||
2012 | 23.74 | 23.54 | a | 34.10 | 40.90 | 51.19 | 61.87 | 64.32 | 64.81 | 57.20 | 43.97 | 36.07 | 21.35 | 43.59 | ||||||||||||
2013 | 14.06 | 20.82 | 32.45 | 35.47 | 48.16 | 63.53 | 65.81 | 62.68 | 55.26 | c | 39.23 | 31.27 | 16.81 | 40.46 | ||||||||||||
2014 | 24.23 | 29.86 | 31.81 | 37.13 | 47.65 | 58.50 | 66.26 | 59.58 | 58.13 | 46.90 | 30.43 | 24.94 | 42.95 | |||||||||||||
2015 | 24.42 | 31.11 | 37.23 | 38.17 | 45.13 | 62.17 | 60.68 | 63.00 | 59.33 | 47.58 | 28.00 | 19.74 | 43.05 | |||||||||||||
2016 | 19.00 | 26.86 | 33.55 | 37.97 | 45.77 | 64.77 | 66.23 | 61.13 | 54.27 | 47.00 | 35.20 | 21.23 | 42.75 | |||||||||||||
2017 | 20.90 | 31.43 | 37.26 | 36.60 | 47.55 | 63.43 | 66.16 | 63.55 | 54.80 | 40.16 | 38.17 | 27.00 | 43.92 | |||||||||||||
2018 | 25.65 | 25.93 | 30.74 | 40.10 | 51.52 | 63.27 | 67.81 | 65.84 | 60.40 | 39.71 | 28.37 | 20.81 | 43.34 | |||||||||||||
2019 | 20.16 | 19.89 | 30.97 | 40.23 | 41.48 | 55.87 | 66.84 | 66.42 | 57.27 | 34.45 | 32.90 | 21.68 | 40.68 | |||||||||||||
2020 | 18.81 | 21.76 | 33.26 | 37.48 | a | 51.45 | 58.33 | 66.13 | 70.19 | 55.48 | a | 46.03 | 32.93 | 20.90 | 42.73 | |||||||||||
2021 | 21.23 | 24.25 | 29.77 | a | 35.85 | d | 49.32 | 64.30 | 67.53 | a | 64.42 | 57.80 | 39.77 | 36.80 | 25.63 | a | 43.06 | |||||||||
2022 | 22.10 | 21.75 | 30.52 | 38.08 | d | 46.00 | 60.57 | 67.29 | 64.42 | 60.55 | a | 43.48 | 25.53 | 22.42 | 41.89 | |||||||||||
2023 | 22.74 | 18.96 | 25.43 | a | 35.30 | 50.81 | 56.57 | 69.61 | 64.03 | 57.37 | 45.06 | 33.17 | 26.00 | 42.09 | ||||||||||||
2024 | 25.10 | 28.34 | 31.19 | 37.28 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.21 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.74 | 25.40 | 32.41 | 38.11 | 47.85 | 58.93 | 64.76 | 62.88 | 55.46 | 42.85 | 31.50 | 22.39 | 42.01 | |||||||||||||
S.D. | 4.27 | 3.95 | 3.40 | 3.31 | 3.59 | 3.61 | 3.10 | 2.73 | 2.78 | 3.63 | 3.38 | 3.40 | 1.81 | |||||||||||||
SKEW | -0.03 | 0.03 | 0.11 | 0.25 | -0.36 | -0.12 | -0.32 | -0.01 | -0.42 | -0.42 | 0.07 | -0.07 | -0.51 | |||||||||||||
MAX | 30.84 | 34.71 | 40.68 | 45.25 | 53.73 | 65.07 | 71.16 | 70.19 | 60.77 | 50.45 | 38.17 | 30.87 | 45.19 | |||||||||||||
MIN | 13.10 | 18.07 | 25.43 | 31.80 | 40.73 | 51.24 | 57.62 | 56.27 | 48.47 | 34.45 | 24.38 | 14.10 | 37.53 | |||||||||||||
YRS | 44 | 44 | 43 | 43 | 43 | 43 | 43 | 43 | 42 | 44 | 44 | 44 | 41 |