YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1973 | ----- | z | ----- | z | 34.90 | 37.40 | 42.06 | 47.83 | 48.23 | 44.84 | 46.30 | 40.65 | 37.23 | 37.87 | 41.73 | b | ||||||||||
1974 | 27.77 | 33.64 | 35.23 | 38.13 | 41.32 | 46.43 | 50.23 | 48.81 | 44.13 | 36.71 | 38.03 | a | 35.97 | 39.70 | ||||||||||||
1975 | 36.67 | a | 33.82 | 33.19 | 33.77 | 40.90 | a | 45.03 | 50.84 | 47.03 | 43.17 | 44.65 | 35.83 | 35.58 | 40.04 | |||||||||||
1976 | 33.16 | 31.21 | 33.40 | a | 36.90 | a | 41.47 | a | 43.67 | 48.87 | 50.52 | 47.21 | a | 38.23 | 37.43 | 30.29 | 39.36 | |||||||||
1977 | 26.97 | 33.96 | 33.94 | 37.86 | b | 40.97 | 46.57 | 48.16 | 53.19 | 46.87 | 41.29 | 36.60 | 37.84 | 40.35 | ||||||||||||
1978 | 36.52 | 38.11 | 37.42 | 38.73 | 41.94 | 49.97 | 50.35 | 50.39 | 48.27 | 39.57 | a | 30.83 | a | ----- | z | 42.01 | a | |||||||||
1979 | 22.84 | 35.36 | 36.32 | 40.17 | a | 43.00 | 47.52 | a | 50.73 | a | 50.13 | a | 47.64 | b | 44.61 | 34.53 | 35.87 | 40.73 | ||||||||
1980 | 28.10 | a | 34.28 | 36.00 | a | 40.38 | a | 42.69 | b | 47.76 | a | 51.33 | a | 45.87 | 44.77 | 39.42 | 38.93 | 36.37 | a | 40.49 | ||||||
1981 | 35.34 | b | 35.33 | a | 35.71 | 40.72 | a | 44.59 | b | 47.67 | 49.45 | 52.10 | 46.37 | 39.58 | 36.87 | 36.50 | a | 41.69 | ||||||||
1982 | 31.80 | a | 33.00 | 34.40 | a | 34.57 | 39.77 | a | 48.97 | a | 49.84 | 50.45 | 46.50 | 40.52 | 33.10 | 33.97 | 39.74 | |||||||||
1983 | 35.94 | 38.68 | 40.23 | a | 36.93 | 43.57 | a | 47.20 | 51.13 | 51.97 | a | 43.41 | a | 39.61 | 41.23 | 32.07 | a | 41.83 | ||||||||
1984 | ----- | z | 36.04 | d | 39.35 | 38.83 | 41.52 | b | 46.13 | 48.16 | 49.03 | a | 44.34 | a | 41.07 | a | 37.59 | a | ----- | z | 42.21 | b | ||||
1985 | 27.23 | a | 30.46 | 33.16 | 40.14 | a | 42.33 | a | 46.14 | a | 51.16 | 47.43 | a | 42.50 | b | 38.77 | 29.73 | 24.94 | 37.83 | |||||||
1986 | 34.57 | a | 36.18 | 38.83 | b | 36.37 | 43.84 | 49.57 | 48.07 | b | 50.97 | 45.10 | 40.61 | 38.73 | ----- | z | 42.08 | a | ||||||||
1987 | 31.30 | a | 34.39 | 37.39 | 38.57 | 45.03 | 46.90 | 50.39 | 48.19 | 45.20 | 38.84 | 38.23 | 33.45 | 40.66 | ||||||||||||
1988 | 31.87 | 32.97 | 34.48 | 39.47 | 42.81 | 46.41 | a | 49.13 | 46.32 | 44.11 | b | 45.00 | 39.43 | 32.87 | 40.41 | |||||||||||
1989 | 34.47 | a | 25.25 | 36.55 | 41.20 | 43.06 | 48.47 | 49.42 | 50.16 | 44.41 | a | 40.13 | 38.07 | 32.77 | 40.33 | |||||||||||
1990 | 35.47 | a | 31.89 | 36.23 | 40.50 | 42.90 | b | 49.66 | a | 51.69 | b | 53.00 | e | 49.29 | b | 38.97 | a | 38.90 | 26.35 | 41.24 | ||||||
1991 | 29.39 | 38.33 | a | 33.48 | 38.80 | 42.58 | 45.55 | a | 50.47 | a | 50.87 | a | 45.30 | 39.13 | a | 40.33 | c | 35.07 | a | 40.78 | ||||||
1992 | 35.71 | 37.38 | 37.81 | 42.27 | 43.77 | 50.00 | a | 51.35 | 48.87 | 46.27 | 43.19 | 37.90 | 32.90 | 42.29 | ||||||||||||
1993 | 28.35 | 29.19 | b | 38.97 | 40.90 | 46.13 | 48.33 | 50.81 | 50.39 | 44.60 | 42.35 | 29.23 | 32.32 | 40.13 | ||||||||||||
1994 | 34.90 | 32.71 | 35.97 | 40.40 | 44.58 | 46.70 | 50.28 | b | 49.43 | a | 48.13 | 38.43 | c | 32.40 | 34.55 | b | 40.71 | |||||||||
1995 | 34.72 | b | 36.22 | a | 34.84 | 37.73 | 43.77 | 47.89 | b | 52.29 | c | 47.97 | a | 50.23 | 40.74 | 41.93 | 35.24 | b | 41.97 | |||||||
1996 | 35.97 | 31.97 | 34.87 | a | 40.90 | 42.00 | a | 45.96 | e | 51.71 | 49.20 | a | 44.97 | a | 41.52 | 37.47 | 36.00 | 41.04 | ||||||||
1997 | 33.03 | a | 33.14 | 36.23 | a | 37.70 | 45.74 | 47.41 | a | 50.40 | a | 52.10 | a | 49.13 | 42.52 | 39.53 | 32.37 | a | 41.61 | |||||||
1998 | 37.87 | 37.54 | 37.16 | 38.34 | a | 45.55 | 48.43 | 53.93 | b | 49.69 | b | 46.87 | 41.61 | 41.14 | a | 31.97 | 42.51 | |||||||||
1999 | 35.00 | 35.88 | b | 34.80 | a | 35.55 | a | 39.94 | 47.28 | a | 47.79 | b | 53.03 | a | 42.36 | b | 38.97 | b | 41.11 | b | 35.10 | 40.57 | ||||
2000 | 32.77 | 36.89 | a | 33.70 | a | 38.70 | 44.07 | d | 47.26 | c | 49.55 | 47.52 | 46.07 | 41.57 | a | 32.13 | 34.93 | a | 40.43 | |||||||
2001 | 32.03 | 31.00 | 35.53 | a | 36.72 | a | 40.26 | 43.77 | 49.50 | a | 49.79 | b | 45.14 | a | 39.73 | a | 40.53 | 34.37 | a | 39.86 | ||||||
2002 | 34.90 | 32.54 | d | 33.58 | 38.00 | 41.77 | a | 47.73 | 49.55 | b | 46.60 | a | 45.24 | a | 37.83 | a | 36.59 | a | 36.74 | 40.09 | ||||||
2003 | 37.17 | a | 32.52 | a | 39.33 | a | 38.77 | 41.94 | 47.77 | 50.33 | a | 49.81 | 46.69 | a | 45.26 | 33.96 | b | 35.31 | b | 41.57 | ||||||
2004 | 35.14 | b | 34.59 | b | 36.67 | a | 38.14 | a | 45.32 | 48.40 | 51.21 | c | 53.19 | 48.25 | b | 44.19 | 36.25 | b | 35.17 | a | 42.21 | |||||
2005 | 33.45 | 29.57 | 36.03 | a | 38.86 | b | 46.10 | 46.48 | a | 50.35 | 47.69 | b | 41.77 | d | 43.61 | 34.50 | 32.16 | 40.05 | ||||||||
2006 | 37.90 | a | 29.41 | a | 33.84 | 37.41 | a | 42.30 | a | 49.00 | 50.10 | b | 45.23 | a | 43.03 | a | 35.72 | b | 37.65 | d | 31.75 | c | 39.45 | |||
2007 | 27.07 | b | 34.75 | d | 38.62 | b | 38.53 | 41.68 | 46.27 | d | 53.21 | b | 49.33 | d | 44.30 | g | 42.00 | g | 34.62 | f | 34.65 | h | 41.18 | d | ||
2008 | 29.42 | g | 33.56 | d | 33.62 | e | 34.92 | d | 44.96 | e | 42.85 | c | 48.07 | c | 50.58 | e | 44.04 | d | 40.13 | a | 39.77 | 31.23 | 40.34 | a | ||
2009 | 32.63 | a | 31.75 | 34.58 | 37.03 | 41.40 | a | 50.17 | 50.48 | 50.10 | 47.39 | b | 40.87 | a | 37.21 | a | 29.00 | 40.22 | ||||||||
2010 | 39.65 | 35.89 | a | 35.52 | b | 36.73 | 42.41 | b | 46.57 | b | 47.93 | a | 47.26 | d | 48.29 | b | 41.77 | 37.45 | a | 36.84 | 41.36 | |||||
2011 | 34.52 | 31.36 | 37.43 | a | 35.72 | a | 40.48 | b | 46.00 | 48.29 | 49.61 | 48.14 | b | 43.89 | c | 35.37 | 29.00 | d | 39.98 | |||||||
2012 | 32.32 | 33.29 | a | 33.83 | a | 39.10 | a | 40.44 | d | 45.93 | a | 49.77 | a | 48.60 | a | 43.32 | b | 41.20 | a | 40.63 | 36.77 | a | 40.43 | |||
2013 | 30.65 | 34.61 | 35.63 | a | 38.28 | a | 43.32 | 48.32 | e | 48.55 | b | 51.57 | a | 50.60 | 36.83 | a | 35.43 | 26.77 | a | 40.05 | ||||||
2014 | 31.67 | a | 34.37 | a | 36.90 | 38.63 | 43.42 | 46.00 | b | 51.42 | 52.34 | b | 46.79 | b | 46.71 | 37.73 | 36.97 | a | 41.91 | |||||||
2015 | 34.21 | c | 36.56 | a | 36.16 | 35.24 | a | 44.15 | e | 48.64 | e | 50.59 | b | 50.12 | f | 44.56 | c | 45.03 | 35.79 | a | 37.55 | 40.77 | a | |||
2016 | 36.35 | 38.37 | b | 39.29 | 41.85 | c | 44.87 | 47.17 | 49.32 | 48.30 | a | 44.63 | 46.58 | 42.72 | a | 30.20 | a | 42.47 | ||||||||
2017 | 28.31 | b | 35.14 | 39.13 | 40.10 | 44.52 | 50.87 | 48.94 | 49.87 | a | 48.77 | 41.00 | 38.78 | c | 30.61 | 41.34 | ||||||||||
2018 | 37.61 | 32.68 | 33.47 | a | 38.21 | a | 44.48 | b | 46.04 | b | 48.88 | f | 49.17 | a | 42.47 | 39.30 | a | 35.73 | 34.43 | a | 39.42 | a | ||||
2019 | 32.50 | a | 31.41 | a | 29.55 | 40.07 | a | 43.28 | b | 45.63 | 50.03 | 50.90 | a | 49.73 | 35.16 | 33.67 | 34.27 | a | 39.68 | |||||||
2020 | 38.39 | 32.14 | 32.20 | a | 36.53 | 43.65 | 48.57 | 50.13 | a | 48.23 | 48.52 | a | 40.48 | 35.66 | a | 33.80 | a | 40.69 | ||||||||
2021 | 35.68 | 36.04 | a | 31.55 | b | 33.40 | 41.61 | 49.93 | 50.03 | 51.10 | 44.77 | 41.16 | 38.71 | b | 35.71 | c | 40.81 | |||||||||
2022 | 32.00 | 30.72 | c | 37.67 | a | 34.53 | 41.68 | 47.30 | 51.82 | c | 51.97 | 48.23 | 44.06 | 31.73 | 33.39 | 40.43 | ||||||||||
2023 | 33.74 | 29.86 | 31.42 | 37.80 | 44.90 | b | 45.07 | b | 49.00 | b | 52.45 | 47.43 | 42.47 | a | 37.90 | a | 38.73 | a | 40.90 | |||||||
2024 | 35.74 | 36.52 | 35.41 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.89 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.29 | 33.77 | 35.61 | 38.17 | 42.96 | 47.28 | 50.09 | 49.66 | 46.03 | 41.03 | 36.97 | 33.70 | 40.70 | |||||||||||||
S.D. | 3.54 | 2.80 | 2.29 | 2.07 | 1.67 | 1.72 | 1.36 | 2.10 | 2.23 | 2.66 | 3.11 | 3.12 | 0.95 | |||||||||||||
SKEW | -0.74 | -0.41 | -0.10 | -0.30 | 0.06 | -0.20 | 0.39 | -0.27 | 0.09 | 0.14 | -0.57 | -0.88 | -0.16 | |||||||||||||
MAX | 39.65 | 38.68 | 40.23 | 42.27 | 46.13 | 50.87 | 53.93 | 53.19 | 50.60 | 46.71 | 42.72 | 38.73 | 42.51 | |||||||||||||
MIN | 22.84 | 25.25 | 29.55 | 33.40 | 39.77 | 42.85 | 47.79 | 44.84 | 41.77 | 35.16 | 29.23 | 24.94 | 37.83 | |||||||||||||
YRS | 49 | 51 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 47 | 43 |