YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1975 | ----- | z | 26.54 | 32.19 | 37.23 | 41.58 | 55.17 | 62.03 | 61.90 | 51.20 | 39.87 | 25.47 | 21.32 | 41.32 | a | |||||||||||
1976 | 14.96 | h | ----- | z | 29.04 | h | 39.41 | a | 45.84 | 58.27 | 59.52 | 58.81 | 52.97 | 35.87 | 23.73 | 16.55 | 43.44 | c | ||||||||
1977 | 13.71 | 24.54 | 25.97 | 38.60 | e | 47.26 | 58.00 | 62.52 | 61.48 | 52.37 | 42.52 | 31.23 | 24.45 | 40.22 | ||||||||||||
1978 | 24.81 | 25.71 | 32.94 | 39.20 | 44.26 | 56.53 | 62.10 | 56.52 | 51.07 | 42.73 | a | 33.83 | a | 17.55 | 40.60 | |||||||||||
1979 | 19.00 | 23.61 | 33.39 | 38.90 | 46.65 | 54.14 | a | 60.97 | 58.42 | 53.97 | a | 42.03 | 27.50 | 21.38 | b | 40.00 | ||||||||||
1980 | 26.17 | a | 28.86 | 28.16 | 34.30 | 44.13 | 56.83 | 63.39 | 60.19 | 53.90 | 38.20 | a | 25.30 | 24.35 | 40.32 | |||||||||||
1981 | 22.25 | c | 23.26 | e | 29.03 | b | 40.87 | 45.26 | 57.57 | 61.52 | 58.20 | a | 53.18 | b | 40.10 | a | 29.21 | a | 20.64 | c | 40.09 | |||||
1982 | 18.39 | c | 21.71 | 30.23 | a | 36.76 | a | 44.52 | 55.28 | a | 60.73 | a | 60.07 | a | 54.54 | b | 37.61 | c | 29.85 | c | 24.17 | b | 39.49 | |||
1983 | 22.04 | f | 25.36 | 31.73 | a | 33.72 | a | 42.23 | a | 52.97 | 60.47 | a | 61.93 | a | 55.38 | d | 42.07 | b | 29.97 | 21.59 | b | 41.58 | a | |||
1984 | 17.57 | a | 23.93 | 28.97 | 34.87 | 49.97 | 55.40 | 61.07 | a | 59.71 | 53.10 | 38.61 | 30.57 | 22.43 | a | 39.68 | ||||||||||
1985 | 22.33 | d | 21.69 | b | 33.00 | b | 39.07 | 47.58 | 56.20 | 61.29 | 59.84 | 49.20 | 41.19 | 31.50 | b | 22.06 | 40.41 | |||||||||
1986 | 23.81 | 26.71 | 33.87 | 41.40 | 46.13 | 56.00 | 59.16 | 60.32 | 49.34 | a | 37.90 | 27.93 | 22.13 | 40.39 | ||||||||||||
1987 | 16.65 | 24.46 | 29.06 | 36.77 | 45.90 | 55.20 | 58.67 | a | 57.71 | 50.83 | a | 42.52 | 30.47 | 22.19 | 39.20 | |||||||||||
1988 | 18.52 | 26.28 | 28.77 | 35.70 | 45.45 | 57.10 | 59.90 | 59.93 | a | 48.87 | 42.16 | 28.80 | 18.42 | 39.16 | ||||||||||||
1989 | 17.45 | 24.68 | 33.19 | 40.30 | 48.19 | 57.27 | 60.19 | 57.71 | 50.53 | 39.94 | 28.67 | 18.68 | 39.73 | |||||||||||||
1990 | 17.61 | 24.29 | 32.87 | 40.97 | 46.71 | 59.50 | 60.10 | 57.87 | 55.57 | 39.45 | 30.80 | 16.93 | a | 40.22 | ||||||||||||
1991 | 18.87 | 26.29 | 30.74 | 36.13 | 46.19 | 55.45 | a | 59.77 | 59.55 | 52.47 | 40.81 | 29.27 | 23.55 | 39.92 | ||||||||||||
1992 | 19.35 | 29.07 | 33.84 | 40.70 | 48.19 | 54.47 | 58.65 | 57.71 | 51.47 | 41.71 | 25.48 | a | ----- | z | 41.88 | a | ||||||||||
1993 | 26.84 | 28.39 | 31.10 | 39.20 | 46.47 | a | 55.17 | a | 61.10 | 59.32 | 50.13 | 37.94 | 26.79 | a | 19.45 | 40.16 | ||||||||||
1994 | 20.26 | 22.46 | 31.55 | 37.37 | 48.10 | 58.97 | 61.58 | 61.77 | 51.66 | a | 38.13 | a | 27.90 | a | 22.53 | a | 40.19 | |||||||||
1995 | 22.10 | 28.43 | 31.68 | 35.07 | 44.87 | 53.23 | 59.71 | 61.71 | 52.13 | 38.07 | a | ----- | z | 24.21 | b | 41.02 | a | |||||||||
1996 | 20.97 | b | 28.44 | b | 28.33 | a | 38.03 | 51.13 | 59.36 | b | 62.35 | 59.97 | a | 49.13 | 39.61 | 30.07 | 22.78 | d | 40.85 | |||||||
1997 | 17.55 | b | 26.56 | a | 31.03 | a | 35.70 | 48.39 | 54.20 | 60.40 | a | 59.00 | 55.76 | a | 38.13 | 26.89 | c | 19.65 | 39.44 | |||||||
1998 | 22.00 | a | 23.96 | b | 30.63 | a | 34.47 | 44.94 | 53.55 | a | 60.17 | a | 58.50 | c | 54.97 | a | 41.45 | b | 31.33 | c | 23.04 | e | 39.92 | |||
1999 | 23.54 | c | 25.42 | d | 32.33 | d | 37.25 | f | 45.35 | ----- | z | ----- | z | 58.80 | a | 50.97 | 40.57 | a | 31.54 | b | 17.96 | c | 36.27 | c | ||
2000 | 23.46 | c | 28.00 | c | 32.44 | d | 39.52 | c | 49.39 | 57.87 | 60.57 | a | 61.17 | a | 52.45 | a | 40.83 | a | 24.73 | 20.63 | d | 40.92 | ||||
2001 | 18.88 | g | 25.11 | a | 30.63 | a | 38.45 | a | 49.45 | 56.43 | 63.32 | 59.65 | 53.00 | a | 39.87 | a | 32.18 | b | 18.58 | 42.42 | a | |||||
2002 | 21.03 | a | 19.62 | b | 25.14 | c | 41.77 | 48.13 | 58.79 | b | 62.07 | a | 59.34 | b | 51.86 | b | 38.87 | 28.44 | c | 22.94 | 39.83 | |||||
2003 | 23.39 | 26.07 | 30.42 | 37.17 | a | 47.90 | 55.50 | 65.81 | 62.23 | a | 52.52 | a | 44.48 | 29.41 | a | 25.21 | b | 41.68 | ||||||||
2004 | 26.06 | 21.34 | 35.29 | 38.90 | 48.32 | 56.03 | 59.68 | 57.75 | c | 51.43 | 40.62 | b | 30.71 | b | 20.26 | 40.53 | ||||||||||
2005 | 27.61 | 30.00 | 28.87 | a | ----- | z | 48.00 | 54.60 | 60.39 | 59.23 | 53.10 | 41.16 | 29.20 | 16.96 | d | 40.83 | a | |||||||||
2006 | 19.23 | 19.61 | 27.52 | 37.10 | a | ----- | z | 56.45 | a | 61.97 | b | 59.32 | 47.07 | 36.33 | a | 26.52 | a | 17.35 | 37.13 | a | ||||||
2007 | 12.65 | 18.61 | 28.55 | 30.17 | a | 44.94 | 53.00 | 60.74 | 60.23 | a | 53.21 | a | 38.59 | b | 27.46 | b | 18.80 | a | 37.25 | |||||||
2008 | 15.55 | b | 20.17 | 26.07 | b | 33.76 | a | 40.61 | c | 51.67 | 57.27 | a | 56.34 | b | 50.38 | d | 39.23 | 29.80 | 24.19 | d | 37.09 | |||||
2009 | ----- | z | ----- | z | 27.97 | b | 34.86 | a | 49.70 | a | 56.43 | 60.90 | a | 58.00 | 51.57 | 37.29 | ----- | z | 19.96 | c | 44.08 | c | ||||
2010 | 20.24 | b | ----- | z | ----- | z | 37.57 | ----- | z | 58.73 | 62.81 | ----- | z | ----- | z | ----- | z | 26.11 | b | ----- | z | 41.09 | g | |||
2011 | 17.55 | 19.46 | b | 32.20 | a | 38.47 | 43.70 | a | 57.63 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.83 | f | |||
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.38 | r | 61.77 | 54.07 | b | 39.74 | 29.20 | 19.55 | 40.87 | g | ||||
2013 | 16.57 | c | 21.50 | 29.17 | a | 36.30 | 46.81 | 58.70 | 61.32 | 60.71 | 54.53 | 37.90 | 28.07 | 19.80 | a | 39.28 | ||||||||||
2014 | 19.53 | a | 26.85 | a | 30.84 | 34.93 | 44.10 | 57.03 | 61.84 | 58.16 | 56.37 | 44.52 | 26.73 | 25.93 | b | 40.57 | ||||||||||
2015 | 23.30 | a | 25.93 | 31.97 | 37.80 | 46.06 | 59.37 | 60.84 | 60.71 | 55.97 | 45.42 | 29.37 | 21.55 | 41.52 | ||||||||||||
2016 | 19.71 | 25.00 | 31.00 | 37.17 | 46.42 | 60.80 | 64.58 | 57.93 | a | 53.27 | 43.81 | 33.97 | 23.14 | b | 41.40 | |||||||||||
2017 | 24.62 | b | 29.50 | 34.16 | 38.97 | 46.29 | 59.47 | 63.80 | a | 60.71 | 54.87 | 41.40 | a | 33.18 | b | 23.06 | m | 44.27 | a | |||||||
2018 | 20.08 | f | 27.43 | 31.55 | 38.13 | 51.06 | 62.25 | b | 62.67 | a | 59.10 | 52.79 | a | 42.25 | c | 26.10 | a | 19.86 | b | 43.02 | a | |||||
2019 | 18.76 | b | 22.70 | a | 32.35 | 38.17 | 43.90 | 54.60 | 61.48 | 60.10 | 53.47 | 34.97 | 26.60 | 21.64 | c | 39.06 | ||||||||||
2020 | 20.43 | a | 21.93 | a | 32.19 | 37.77 | 49.83 | a | 56.07 | 62.87 | 61.81 | 49.43 | 38.81 | 32.48 | e | 18.57 | a | 40.18 | ||||||||
2021 | 20.17 | a | 22.41 | a | 29.39 | 35.48 | a | 48.13 | a | 59.73 | 61.59 | b | 59.65 | 55.33 | 40.29 | 31.12 | d | 24.56 | f | 42.12 | a | |||||
2022 | 19.81 | d | 17.61 | e | 28.06 | 38.03 | 47.83 | a | 57.89 | b | ----- | z | 59.87 | 54.82 | b | 39.79 | c | 24.10 | a | 20.04 | f | 38.78 | b | |||
2023 | 22.25 | g | 19.86 | 27.13 | 34.07 | a | 48.23 | 53.04 | d | 65.69 | b | 61.03 | b | 53.63 | 41.68 | 30.90 | a | 22.64 | c | 41.63 | a | |||||
2024 | 20.65 | 25.59 | 29.93 | a | 36.78 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.39 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.48 | 24.46 | 30.58 | 37.38 | 46.61 | 56.55 | 61.32 | 59.61 | 52.55 | 40.15 | 28.92 | 21.06 | 39.98 | |||||||||||||
S.D. | 3.40 | 3.16 | 2.33 | 2.38 | 2.35 | 2.30 | 1.73 | 1.49 | 2.15 | 2.28 | 2.55 | 2.47 | 1.00 | |||||||||||||
SKEW | 0.07 | -0.27 | -0.31 | -0.47 | -0.31 | 0.13 | 0.48 | -0.10 | -0.31 | 0.10 | -0.08 | -0.05 | -1.13 | |||||||||||||
MAX | 27.61 | 30.00 | 35.29 | 41.77 | 51.13 | 62.25 | 65.81 | 62.23 | 56.37 | 45.42 | 33.97 | 25.93 | 41.68 | |||||||||||||
MIN | 12.65 | 17.61 | 25.14 | 30.17 | 40.61 | 51.67 | 57.27 | 56.34 | 47.07 | 34.97 | 23.73 | 16.55 | 37.09 | |||||||||||||
YRS | 42 | 46 | 47 | 46 | 46 | 47 | 45 | 47 | 47 | 47 | 46 | 43 | 31 |