YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.52 | 48.38 | a | 44.53 | a | 40.43 | 36.60 | a | 44.49 | g | ||
1968 | 36.10 | 39.38 | 40.35 | 38.87 | 45.45 | 48.43 | 51.42 | 50.90 | 49.24 | a | 42.90 | a | 40.97 | 34.19 | 43.18 | |||||||||||
1969 | 29.84 | 34.07 | 36.42 | 40.20 | 46.00 | 53.37 | 51.45 | 48.97 | 48.60 | 40.87 | a | 36.53 | 39.13 | 42.12 | ||||||||||||
1970 | 37.29 | 36.37 | a | 36.74 | 39.30 | 43.61 | 48.00 | 49.45 | 50.83 | a | 44.62 | a | 42.10 | b | 40.29 | b | 34.83 | a | 41.95 | |||||||
1971 | 36.63 | a | 35.65 | b | 35.97 | a | 39.10 | 44.81 | 47.43 | 50.94 | 51.35 | 44.69 | a | 40.19 | 39.59 | a | 34.35 | 41.73 | ||||||||
1972 | 33.48 | 36.00 | 39.32 | 38.34 | a | 44.97 | 48.90 | 51.00 | 49.87 | 43.59 | a | 38.71 | 39.50 | 31.97 | a | 41.30 | ||||||||||
1973 | 33.35 | 36.00 | 37.32 | 40.67 | 43.55 | 48.14 | a | 49.23 | 48.03 | 47.50 | 42.40 | a | 37.50 | 40.39 | 42.01 | |||||||||||
1974 | 32.58 | 36.71 | 37.80 | a | 41.63 | 43.19 | 47.83 | 49.65 | 52.13 | 47.57 | 37.87 | 39.53 | 40.13 | 42.22 | ||||||||||||
1975 | 36.32 | 35.19 | a | 36.39 | 36.20 | 43.90 | 47.13 | 50.93 | a | 52.55 | 47.50 | 43.90 | a | 40.97 | a | 37.48 | 42.37 | |||||||||
1976 | 36.03 | 35.69 | 36.00 | a | 38.93 | 43.68 | 46.87 | 51.00 | 50.26 | 49.33 | 42.07 | a | 35.12 | f | 35.33 | a | 42.29 | a | ||||||||
1977 | 30.60 | a | 38.43 | 38.06 | 40.10 | 43.23 | 49.03 | a | 49.48 | 53.53 | a | 47.20 | 40.26 | 38.60 | 37.57 | c | 42.18 | |||||||||
1978 | 39.39 | 40.04 | 38.10 | 41.40 | 43.52 | 50.13 | 51.35 | 52.39 | 49.23 | 42.10 | 31.83 | 30.26 | 42.48 | |||||||||||||
1979 | 27.94 | 35.29 | 38.77 | 41.77 | 44.94 | 47.23 | 51.65 | 52.16 | 50.07 | 45.16 | 36.97 | 40.52 | 42.70 | |||||||||||||
1980 | 29.39 | 37.90 | 38.74 | 40.53 | 42.86 | c | 47.90 | 51.94 | 49.74 | 47.33 | 41.30 | a | 39.28 | a | 38.52 | 42.12 | ||||||||||
1981 | 37.42 | 35.50 | 38.27 | a | 40.69 | a | 45.00 | 49.70 | 51.68 | 52.26 | 47.47 | 40.06 | 39.97 | 37.03 | 42.92 | |||||||||||
1982 | 33.04 | h | 35.23 | b | 36.73 | a | 37.86 | b | 44.71 | c | 50.52 | g | 52.86 | c | 50.79 | b | 48.62 | a | 44.13 | h | 35.96 | c | 33.92 | e | 41.85 | c |
1983 | 40.73 | i | 41.10 | g | 40.38 | g | 38.43 | b | 45.90 | 49.86 | a | 52.10 | b | 51.13 | a | 43.64 | b | 36.64 | c | 42.67 | c | 30.90 | b | 43.48 | c | |
1984 | 36.04 | c | 37.07 | b | 39.89 | c | 38.20 | 41.83 | a | 48.10 | 48.58 | 46.81 | 45.90 | 41.26 | 39.07 | a | 32.03 | 41.23 | ||||||||
1985 | 29.87 | 31.43 | 34.13 | 40.07 | 43.26 | 45.47 | 50.06 | 48.00 | 44.13 | 40.00 | 32.10 | 29.77 | 39.02 | |||||||||||||
1986 | 40.48 | 37.14 | 42.16 | 40.07 | 44.42 | 49.67 | 52.39 | 51.45 | 45.97 | 45.26 | 40.30 | 37.87 | 43.93 | |||||||||||||
1987 | 37.16 | 39.79 | 40.26 | 41.33 | 46.19 | 48.03 | 51.81 | 51.81 | 47.67 | 41.13 | 43.77 | 34.00 | 43.58 | |||||||||||||
1988 | 35.81 | 37.36 | a | 37.71 | 42.23 | 43.71 | 47.07 | 50.61 | 50.71 | 45.70 | 47.10 | 41.90 | 36.90 | 43.07 | ||||||||||||
1989 | 35.61 | 29.86 | 38.57 | a | 41.80 | 45.07 | a | 50.57 | 51.29 | 52.03 | 45.77 | 44.77 | a | 41.23 | 36.97 | b | 42.79 | |||||||||
1990 | 38.80 | a | 35.04 | a | 39.45 | 43.60 | 45.73 | a | 49.50 | 52.87 | a | 53.90 | 51.66 | a | 43.71 | 41.69 | a | 30.97 | 43.91 | |||||||
1991 | 33.53 | a | 40.64 | 36.48 | 41.03 | 45.68 | 48.69 | a | 51.77 | 53.45 | 49.33 | 39.23 | 41.66 | a | 39.26 | 43.40 | ||||||||||
1992 | 39.68 | 39.90 | 39.50 | a | 43.37 | 44.87 | 51.40 | 53.32 | 51.10 | 45.13 | 43.94 | 39.03 | a | 34.47 | a | 43.81 | ||||||||||
1993 | 31.48 | b | 33.64 | 40.16 | 43.07 | b | 48.67 | a | 50.17 | 53.42 | 51.48 | b | 46.83 | a | 44.04 | c | 31.61 | b | 36.46 | c | 42.59 | |||||
1994 | 38.07 | d | 35.04 | a | 40.76 | b | 43.40 | 44.67 | a | 48.45 | a | 52.23 | 51.77 | a | 50.57 | 38.42 | g | 35.76 | a | 37.07 | a | 43.43 | a | |||
1995 | 42.86 | b | 38.32 | 37.48 | 41.59 | c | 47.28 | b | 50.04 | b | 54.21 | b | 49.17 | a | 53.48 | c | 43.85 | d | 44.10 | a | 40.52 | 45.24 | ||||
1996 | 36.59 | b | 35.39 | a | 38.34 | b | 44.79 | a | 44.65 | 48.17 | a | 51.16 | 50.34 | b | 48.17 | a | 42.76 | b | 39.59 | a | 35.70 | a | 42.97 | |||
1997 | 37.29 | 37.21 | 37.97 | a | 39.13 | 47.16 | 49.23 | 52.84 | 54.73 | a | 52.04 | b | 45.06 | 42.46 | b | 37.07 | a | 44.35 | ||||||||
1998 | 39.21 | b | 40.26 | a | 39.80 | a | 39.14 | a | 48.00 | a | 51.77 | 55.32 | 52.90 | a | 47.86 | a | 43.46 | c | 43.43 | 35.53 | a | 44.72 | ||||
1999 | 37.03 | b | 37.52 | a | 36.37 | a | 38.33 | 43.84 | 49.83 | a | 50.55 | 54.34 | b | 46.00 | c | 41.55 | b | 43.43 | 38.83 | a | 43.14 | |||||
2000 | 34.55 | b | 36.93 | a | 36.77 | 41.60 | 46.10 | b | 49.30 | 52.48 | 52.26 | 48.72 | a | 44.83 | a | 34.85 | d | 36.03 | a | 42.87 | ||||||
2001 | 37.10 | 31.78 | a | 37.10 | 38.86 | b | 43.81 | 46.53 | 50.77 | a | 51.74 | 48.33 | 41.93 | a | 40.74 | c | 37.53 | a | 42.18 | |||||||
2002 | 36.96 | c | 36.04 | c | 36.07 | a | 40.80 | 43.69 | b | 49.81 | c | 53.60 | a | 51.45 | b | 48.90 | 42.33 | a | 39.60 | e | 39.87 | 43.26 | ||||
2003 | 41.52 | 35.50 | 42.00 | 41.79 | a | 45.03 | b | 50.73 | 52.55 | 52.03 | 48.33 | 48.27 | a | 36.48 | a | 38.90 | a | 44.43 | ||||||||
2004 | 38.35 | 38.45 | 39.81 | 41.23 | 47.68 | 51.40 | 54.97 | 56.23 | a | 49.50 | 46.61 | 37.87 | 38.32 | 45.04 | ||||||||||||
2005 | 39.00 | 34.41 | a | 39.29 | c | 43.20 | 48.81 | 49.89 | b | 52.00 | 51.55 | 43.63 | 45.52 | 35.52 | a | 35.40 | a | 43.18 | ||||||||
2006 | 39.55 | b | 33.79 | 36.48 | 40.50 | 43.16 | 50.67 | c | 50.90 | 49.76 | b | 47.53 | 41.10 | a | 39.93 | b | 37.35 | 42.56 | ||||||||
2007 | 33.23 | 39.00 | a | 39.76 | b | 41.48 | a | 45.00 | b | 48.23 | 54.77 | a | 52.60 | a | 49.24 | a | 41.54 | c | 35.70 | 36.74 | 43.11 | |||||
2008 | 33.48 | b | 36.31 | 36.03 | 37.13 | 47.19 | 47.90 | 50.94 | 52.97 | 46.50 | 41.29 | 43.40 | 33.39 | 42.21 | ||||||||||||
2009 | 33.74 | 32.57 | 35.68 | 38.63 | 44.57 | x | 51.07 | 52.45 | b | 53.87 | 48.57 | 43.81 | 41.37 | 31.58 | 42.12 | a | ||||||||||
2010 | 42.63 | a | 38.93 | 39.03 | 41.83 | 45.23 | 48.83 | 51.32 | 51.74 | 51.93 | 43.68 | 39.00 | 39.58 | 44.48 | ||||||||||||
2011 | 36.61 | 33.43 | 38.77 | 38.10 | 43.65 | 50.60 | 52.65 | 53.06 | 48.73 | 43.90 | 33.33 | 31.90 | 42.06 | |||||||||||||
2012 | 35.26 | 38.72 | 37.45 | 41.90 | 44.03 | 48.83 | 53.52 | 52.84 | 47.47 | 43.32 | 41.50 | 38.94 | 43.65 | |||||||||||||
2013 | 32.13 | 37.82 | 39.48 | 41.67 | 47.19 | 51.63 | 53.19 | 54.16 | 52.97 | 40.52 | 38.43 | 31.03 | 43.35 | |||||||||||||
2014 | 35.55 | 35.36 | 41.13 | 43.07 | 49.29 | 51.83 | 53.48 | 54.39 | 52.43 | 49.90 | 40.37 | 41.06 | 45.66 | |||||||||||||
2015 | 38.19 | 42.57 | 40.00 | 40.53 | 48.55 | 50.80 | 55.03 | 54.48 | 48.07 | 48.55 | 37.93 | 39.55 | 45.35 | |||||||||||||
2016 | 42.10 | 43.72 | 42.32 | 44.93 | 48.35 | 50.23 | 55.65 | 53.03 | 48.53 | 47.29 | 47.30 | 32.58 | 46.34 | |||||||||||||
2017 | 29.06 | 33.07 | 40.68 | 43.61 | l | 47.23 | 51.57 | 52.26 | 52.35 | 46.40 | 39.96 | g | 39.33 | c | 34.46 | e | 42.64 | b | ||||||||
2018 | 42.14 | c | 34.83 | e | 35.03 | a | 40.90 | 47.00 | 49.23 | 52.55 | 54.19 | 46.07 | 41.90 | 39.67 | 37.84 | 43.45 | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.06 | 36.53 | 38.34 | 40.67 | 45.31 | 49.30 | 52.03 | 51.89 | 47.94 | 42.95 | 39.29 | 36.13 | 43.12 | |||||||||||||
S.D. | 3.70 | 2.75 | 1.92 | 1.94 | 1.82 | 1.62 | 1.60 | 1.85 | 2.35 | 2.73 | 3.24 | 3.06 | 1.32 | |||||||||||||
SKEW | -0.25 | 0.16 | 0.09 | 0.03 | 0.48 | 0.06 | 0.24 | -0.39 | 0.26 | 0.29 | -0.42 | -0.39 | -0.04 | |||||||||||||
MAX | 42.86 | 43.72 | 42.32 | 44.93 | 49.29 | 53.37 | 55.65 | 56.23 | 53.48 | 49.90 | 47.30 | 41.06 | 46.34 | |||||||||||||
MIN | 27.94 | 29.86 | 34.13 | 36.20 | 41.83 | 45.47 | 48.58 | 46.81 | 43.59 | 36.64 | 31.61 | 29.77 | 39.02 | |||||||||||||
YRS | 49 | 50 | 50 | 50 | 50 | 50 | 51 | 52 | 52 | 49 | 51 | 52 | 45 |