YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | 43.53 | a | 53.63 | 59.84 | 55.94 | 51.07 | ----- | z | ----- | z | ----- | z | 52.80 | g | ||||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | 30.73 | 44.52 | 53.37 | 57.87 | 57.29 | 52.41 | a | 40.20 | a | 25.52 | a | 22.13 | 42.67 | c | ||||||
1998 | 24.03 | 24.74 | a | 25.13 | a | 32.60 | 46.17 | a | 48.72 | a | 60.94 | 59.23 | 54.13 | 39.68 | ----- | z | 21.23 | a | 39.69 | a | ||||||
1999 | 25.24 | b | 26.52 | a | 28.87 | a | 29.61 | b | 42.48 | b | 51.43 | 60.77 | 58.65 | 46.40 | 39.13 | 35.61 | b | 26.65 | 39.28 | |||||||
2000 | 24.60 | a | 28.41 | 29.97 | 36.19 | d | 47.97 | a | 53.43 | 61.34 | b | 61.32 | 49.13 | 39.60 | a | 20.33 | 18.74 | 39.25 | ||||||||
2001 | 21.71 | 19.54 | 28.61 | 37.30 | c | 45.16 | 55.24 | a | 62.97 | 60.29 | 52.20 | 38.47 | a | 32.87 | 23.37 | a | 39.81 | |||||||||
2002 | 20.27 | a | 21.36 | 21.00 | b | 36.50 | 42.13 | a | 57.53 | 63.74 | 56.17 | b | 51.73 | 34.07 | a | 28.53 | 26.35 | 38.28 | ||||||||
2003 | 27.81 | 19.04 | a | 30.40 | a | 38.17 | 45.13 | 49.93 | 63.43 | c | 60.22 | d | 48.04 | c | 43.52 | b | 26.63 | 24.74 | 39.75 | |||||||
2004 | 23.94 | 22.11 | a | 34.42 | 36.97 | 46.97 | 51.62 | a | 58.19 | 55.58 | 51.80 | 40.23 | 29.57 | 26.19 | 39.80 | |||||||||||
2005 | 25.19 | 25.71 | 29.87 | 36.17 | 46.13 | 54.03 | 63.00 | 58.10 | 51.80 | 39.77 | 32.23 | 22.58 | 40.38 | |||||||||||||
2006 | 28.71 | 20.68 | 26.45 | 37.87 | 47.19 | 57.70 | 62.32 | 58.58 | 45.17 | 37.79 | b | 30.43 | 23.42 | 39.69 | ||||||||||||
2007 | 15.10 | 21.18 | 33.67 | a | 34.20 | 45.90 | 54.50 | 61.97 | 60.55 | i | 50.90 | 41.13 | 29.57 | 18.19 | 36.94 | a | ||||||||||
2008 | 18.61 | 22.31 | 26.77 | 32.43 | 42.60 | a | 53.07 | 61.45 | 57.26 | 47.90 | 39.81 | 32.60 | 18.00 | 37.73 | ||||||||||||
2009 | 23.90 | 27.29 | 28.74 | 33.41 | a | 45.80 | a | 51.40 | 56.77 | 56.16 | 48.83 | 30.71 | 31.60 | 16.03 | a | 37.55 | ||||||||||
2010 | 22.65 | 17.63 | a | 28.65 | 35.00 | a | 39.23 | a | 54.77 | 59.48 | 59.65 | 52.17 | 43.03 | 28.40 | 24.65 | 38.77 | ||||||||||
2011 | 20.45 | 15.71 | 29.61 | 35.00 | 40.47 | a | 54.23 | 61.48 | 60.48 | 50.20 | 38.81 | 28.70 | 19.61 | 37.90 | ||||||||||||
2012 | 25.26 | 19.28 | 35.61 | 38.93 | 45.48 | 59.00 | 63.03 | 58.94 | 52.40 | 37.81 | 33.50 | 21.94 | 40.93 | |||||||||||||
2013 | 20.74 | 20.61 | 25.39 | 29.20 | 45.47 | a | 54.67 | 60.19 | 59.87 | 54.10 | 36.23 | 30.07 | c | 19.19 | 37.98 | |||||||||||
2014 | 22.19 | 17.57 | 26.42 | 35.53 | 43.97 | a | 53.03 | a | 60.29 | 57.35 | 50.77 | 42.19 | 26.17 | 22.87 | 38.20 | |||||||||||
2015 | 23.32 | 23.61 | 32.16 | 36.07 | 41.10 | 57.00 | 58.58 | 59.87 | h | 54.57 | 45.48 | 29.80 | 22.39 | 38.55 | a | |||||||||||
2016 | 23.94 | 25.62 | h | 31.15 | e | 38.23 | 43.03 | a | 59.10 | a | 61.45 | 57.58 | 51.86 | a | 44.80 | a | 36.47 | 16.54 | e | 42.20 | a | |||||
2017 | 25.00 | s | 29.74 | a | 34.90 | a | 35.74 | c | 43.77 | a | 56.97 | 60.97 | 57.07 | a | 52.03 | 38.77 | 33.50 | 22.73 | a | 42.38 | a | |||||
2018 | 24.94 | 20.00 | f | 28.65 | 32.80 | 49.00 | 57.80 | 60.11 | d | 58.36 | c | 54.60 | e | 39.71 | c | 27.96 | b | 22.65 | 41.51 | a | ||||||
2019 | 21.70 | a | 15.04 | 24.87 | 38.10 | 38.87 | 52.76 | a | 60.42 | 59.87 | 54.30 | 31.69 | b | 26.19 | c | 26.52 | 37.53 | |||||||||
2020 | 25.06 | 18.83 | 31.52 | d | 33.10 | 46.03 | 56.63 | 61.97 | 61.48 | 52.03 | 37.03 | 33.93 | 25.74 | 40.28 | ||||||||||||
2021 | 24.23 | a | 14.79 | 28.87 | 33.00 | 45.77 | 59.47 | 62.68 | 61.38 | e | 57.07 | 42.87 | 33.77 | 28.23 | 41.01 | |||||||||||
2022 | 20.23 | 15.36 | 28.23 | a | 34.97 | 45.97 | 57.97 | a | 64.06 | 63.45 | 57.33 | 43.68 | 24.90 | 21.47 | a | 39.80 | ||||||||||
2023 | 21.77 | 20.64 | 23.48 | 32.97 | 47.87 | 53.20 | 62.26 | 60.68 | 54.07 | 40.19 | 32.53 | 29.48 | 39.93 | |||||||||||||
2024 | 19.61 | 26.48 | 29.84 | 38.63 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.31 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 22.89 | 21.37 | 29.01 | 34.84 | 44.56 | 54.72 | 61.13 | 58.88 | 51.75 | 39.50 | 30.05 | 22.65 | 39.19 | |||||||||||||
S.D. | 2.91 | 4.31 | 3.48 | 2.65 | 2.58 | 2.84 | 1.83 | 2.00 | 2.86 | 3.54 | 3.73 | 3.49 | 1.12 | |||||||||||||
SKEW | -0.45 | 0.24 | -0.09 | -0.43 | -0.58 | -0.07 | -0.52 | 0.20 | -0.27 | -0.68 | -0.50 | -0.08 | -0.09 | |||||||||||||
MAX | 28.71 | 29.74 | 35.61 | 38.93 | 49.00 | 59.47 | 64.06 | 63.45 | 57.33 | 45.48 | 36.47 | 29.48 | 41.01 | |||||||||||||
MIN | 15.10 | 14.79 | 21.00 | 29.20 | 38.87 | 48.72 | 56.77 | 55.58 | 45.17 | 30.71 | 20.33 | 16.03 | 37.53 | |||||||||||||
YRS | 26 | 25 | 27 | 27 | 28 | 28 | 28 | 26 | 28 | 27 | 26 | 27 | 20 |