YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.65 | 53.81 | 45.27 | 41.06 | 31.23 | 27.03 | 42.17 | f | ||||||
1979 | 27.71 | 31.07 | 35.45 | 37.20 | 45.68 | 49.90 | 53.55 | 51.61 | 48.63 | 43.48 | 32.97 | 30.58 | 40.65 | |||||||||||||
1980 | 30.48 | 34.59 | 33.13 | 39.00 | a | 43.19 | 46.50 | 55.10 | 52.03 | 45.87 | 39.55 | 33.73 | 32.19 | 40.45 | ||||||||||||
1981 | 32.97 | 31.93 | 33.58 | 39.79 | a | 46.40 | a | 53.50 | b | 54.90 | 51.81 | 48.77 | 37.97 | a | 36.33 | 32.94 | 41.74 | |||||||||
1982 | 26.77 | 31.00 | 32.84 | 34.67 | 44.80 | a | 50.53 | 52.06 | 51.30 | a | 46.40 | 39.80 | a | 31.73 | 30.77 | 39.39 | ||||||||||
1983 | 31.42 | 34.71 | 35.17 | a | 36.24 | a | 43.70 | a | 49.73 | 50.31 | b | 51.39 | 49.87 | 41.74 | 35.87 | 31.97 | 41.01 | |||||||||
1984 | 29.84 | 30.03 | 34.61 | 37.03 | a | 44.03 | 49.52 | a | 56.32 | 50.71 | 46.97 | 39.03 | 32.83 | 28.35 | 39.94 | |||||||||||
1985 | 29.74 | 29.21 | 30.90 | 40.00 | 42.37 | a | 54.00 | 54.68 | 49.32 | 45.45 | a | 38.84 | 28.50 | b | 30.40 | a | 39.45 | |||||||||
1986 | 34.10 | 36.50 | 37.65 | 39.13 | 44.13 | 54.28 | a | 53.13 | 51.07 | b | 45.37 | 40.23 | 33.38 | a | 30.23 | 41.60 | ||||||||||
1987 | 28.06 | 31.14 | 32.37 | a | 37.80 | 46.07 | a | 50.63 | 51.40 | a | 51.76 | b | 46.79 | b | 41.86 | b | 35.10 | 32.37 | a | 40.45 | ||||||
1988 | 29.06 | 30.64 | a | 32.52 | 39.17 | a | 40.83 | a | 50.77 | 56.16 | 51.97 | 46.50 | 42.52 | 36.37 | 29.30 | a | 40.48 | |||||||||
1989 | 27.69 | b | 25.96 | 34.26 | 40.57 | 44.29 | 51.87 | 50.87 | 49.57 | c | 45.47 | 38.74 | 33.13 | 29.39 | 39.32 | |||||||||||
1990 | 29.90 | 25.89 | 33.32 | 42.37 | 43.45 | 47.17 | 54.48 | 53.03 | 46.87 | 38.81 | 30.57 | 22.80 | a | 39.05 | ||||||||||||
1991 | 27.23 | 31.93 | 31.52 | 36.07 | 42.10 | 48.27 | 56.61 | 50.23 | 48.03 | 42.23 | 35.77 | 29.58 | 39.96 | |||||||||||||
1992 | 28.65 | 33.75 | a | 35.55 | 41.57 | 48.81 | 52.80 | 53.13 | 51.97 | 46.90 | 41.74 | 33.63 | 29.24 | b | 41.48 | |||||||||||
1993 | 26.87 | 29.39 | 37.48 | 36.03 | 44.74 | 49.03 | 53.93 | b | 51.07 | b | 44.70 | 42.03 | 30.20 | 30.06 | 39.63 | |||||||||||
1994 | 31.61 | c | 29.93 | a | 33.71 | 37.66 | a | 45.67 | a | 46.93 | a | 55.52 | b | 49.30 | a | 45.83 | a | 37.63 | a | 28.40 | 29.19 | 39.28 | ||||
1995 | 35.53 | a | 32.64 | 33.84 | 35.69 | a | 43.90 | 47.50 | 51.83 | b | 49.57 | a | 46.27 | 39.24 | b | 35.79 | a | 34.81 | 40.55 | |||||||
1996 | 31.52 | 33.72 | 33.10 | 37.73 | 42.84 | 49.67 | 55.32 | 51.19 | 44.37 | 38.03 | 34.93 | 33.65 | 40.51 | |||||||||||||
1997 | 30.45 | 30.50 | 33.84 | 38.60 | 45.48 | 48.86 | a | 53.41 | b | 50.90 | 46.13 | 39.40 | a | 38.20 | 30.39 | 40.51 | ||||||||||
1998 | 36.10 | 31.89 | 33.29 | 35.20 | 40.81 | 46.87 | 54.29 | 51.32 | 48.00 | 37.77 | 33.73 | 27.20 | a | 39.71 | ||||||||||||
1999 | 30.61 | 29.29 | 31.30 | a | 35.46 | b | 42.38 | b | 49.10 | 49.06 | 50.71 | 46.30 | 37.29 | 37.28 | a | 29.87 | 39.05 | |||||||||
2000 | 31.68 | 33.79 | 33.06 | 38.93 | a | 43.45 | 50.77 | 50.97 | 52.42 | 46.03 | 39.58 | 31.37 | 30.10 | a | 40.18 | |||||||||||
2001 | 28.13 | 29.00 | 34.60 | a | 34.80 | 45.93 | a | 50.45 | a | 53.60 | a | 52.23 | a | 47.53 | 41.37 | a | 36.10 | a | 31.20 | a | 40.41 | |||||
2002 | 27.93 | a | 30.07 | a | 30.87 | 38.44 | c | 42.23 | 49.48 | a | 53.93 | a | 50.93 | a | 44.77 | 38.10 | 31.69 | a | 32.83 | a | 39.27 | |||||
2003 | 35.07 | a | 30.39 | 35.00 | 34.87 | 42.45 | 52.97 | a | 54.17 | a | 50.90 | 47.34 | a | 40.80 | a | 33.13 | 32.29 | 40.78 | ||||||||
2004 | 28.52 | 31.76 | 36.37 | a | 38.27 | 42.90 | 50.24 | a | 53.74 | 51.23 | a | 45.10 | a | 39.23 | a | 33.87 | 31.42 | 40.22 | ||||||||
2005 | 30.32 | 32.29 | 33.84 | 36.30 | 45.70 | a | 47.70 | 55.62 | b | 52.21 | b | 43.15 | c | 38.61 | 34.07 | a | 32.76 | b | 40.21 | |||||||
2006 | 31.90 | 30.00 | 31.10 | b | 38.14 | a | 45.17 | a | 53.72 | a | 55.45 | b | 51.74 | 44.80 | 37.59 | b | 35.40 | 29.52 | 40.38 | |||||||
2007 | 26.23 | 31.07 | a | 34.65 | 35.93 | 43.67 | a | 49.66 | a | 54.19 | 50.13 | a | 44.80 | 37.26 | 33.37 | 27.93 | a | 39.07 | ||||||||
2008 | 27.16 | 28.03 | 29.33 | a | 31.80 | 44.67 | a | 48.52 | a | 52.90 | 54.83 | a | 45.90 | 39.97 | 36.30 | 26.39 | 38.82 | |||||||||
2009 | 28.58 | 29.89 | 32.48 | 35.53 | 46.45 | 51.67 | 53.42 | 49.71 | 46.73 | 39.10 | 31.27 | 26.94 | 39.31 | |||||||||||||
2010 | 31.83 | a | 30.50 | 30.16 | 33.00 | 39.32 | 50.57 | 53.74 | 49.48 | 43.90 | 40.84 | 30.37 | 32.81 | 38.88 | ||||||||||||
2011 | 28.90 | 27.46 | 32.13 | 33.90 | 39.10 | 47.23 | 52.94 | 50.84 | 47.17 | 40.48 | 31.23 | 27.81 | 38.27 | |||||||||||||
2012 | 26.97 | 28.28 | 32.06 | 36.93 | 44.00 | 49.00 | 51.97 | 51.65 | 45.93 | 40.16 | 35.20 | 29.42 | 39.30 | |||||||||||||
2013 | 25.55 | 28.79 | 33.71 | 40.73 | 44.81 | 52.67 | 53.16 | 50.68 | 46.13 | 35.29 | 31.53 | 24.74 | 38.98 | |||||||||||||
2014 | 27.94 | 30.39 | 35.16 | 36.40 | 42.06 | 52.83 | 56.52 | 52.29 | 48.07 | 41.74 | 35.07 | 37.42 | 41.32 | |||||||||||||
2015 | ----- | z | 35.39 | 36.10 | 37.10 | 45.65 | 54.60 | 56.87 | 52.42 | 46.43 | 42.39 | 30.23 | 29.87 | 42.46 | a | |||||||||||
2016 | 31.03 | 31.97 | 34.84 | 40.77 | 46.32 | 51.70 | 53.39 | 52.55 | 46.30 | 40.10 | 35.63 | 25.90 | 40.87 | |||||||||||||
2017 | 26.52 | 32.75 | 34.65 | 37.33 | 45.45 | 52.32 | b | 54.63 | a | 55.87 | 47.97 | 37.45 | 35.10 | 28.60 | a | 40.72 | ||||||||||
2018 | 33.77 | 28.86 | 31.06 | 37.43 | 46.45 | 50.70 | 56.06 | 50.39 | 45.17 | 38.81 | 33.20 | 29.94 | 40.15 | |||||||||||||
2019 | 29.61 | 27.93 | 31.23 | 41.33 | 42.77 | 50.43 | 53.68 | 52.13 | 46.10 | 33.45 | 33.60 | 30.52 | 39.40 | |||||||||||||
2020 | 30.52 | 28.69 | 31.35 | 37.90 | 43.74 | 50.07 | 55.35 | 54.55 | 48.13 | 40.74 | 30.40 | 27.77 | 39.94 | |||||||||||||
2021 | 30.55 | 29.32 | 30.65 | 36.13 | 46.32 | 54.93 | 56.97 | 54.65 | 46.77 | 39.10 | 34.40 | 28.84 | 40.72 | |||||||||||||
2022 | 28.00 | 28.32 | 34.16 | 34.27 | 41.45 | 48.37 | 53.97 | 54.06 | 48.40 | 38.77 | 28.10 | 27.26 | 38.76 | |||||||||||||
2023 | 29.03 | 26.32 | 27.16 | 32.87 | 44.35 | 48.97 | 54.42 | 54.06 | 46.13 | 39.29 | 32.13 | 32.84 | 38.97 | |||||||||||||
2024 | 31.65 | 31.52 | 31.03 | 35.91 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.40 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.86 | 30.62 | 33.18 | 37.25 | 44.00 | 50.38 | 53.96 | 51.69 | 46.38 | 39.55 | 33.31 | 29.94 | 39.98 | |||||||||||||
S.D. | 2.55 | 2.40 | 2.12 | 2.42 | 2.00 | 2.24 | 1.77 | 1.55 | 1.37 | 1.95 | 2.43 | 2.67 | 0.85 | |||||||||||||
SKEW | 0.60 | 0.25 | -0.25 | 0.02 | -0.33 | 0.26 | -0.52 | 0.70 | 0.17 | -0.50 | -0.27 | 0.01 | 0.13 | |||||||||||||
MAX | 36.10 | 36.50 | 37.65 | 42.37 | 48.81 | 54.93 | 56.97 | 55.87 | 49.87 | 43.48 | 38.20 | 37.42 | 41.74 | |||||||||||||
MIN | 25.55 | 25.89 | 27.16 | 31.80 | 39.10 | 46.50 | 49.06 | 49.30 | 43.15 | 33.45 | 28.10 | 22.80 | 38.27 | |||||||||||||
YRS | 45 | 46 | 46 | 45 | 45 | 45 | 46 | 46 | 46 | 46 | 46 | 46 | 44 |