YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.31 | 29.31 | k | |
1969 | 28.97 | 30.64 | 36.53 | 43.07 | 53.68 | 60.50 | d | 63.33 | a | 61.95 | 57.73 | b | 43.27 | c | 37.95 | a | 31.24 | 45.74 | ||||||||
1970 | 31.85 | a | 37.43 | 37.34 | 37.12 | 50.24 | 60.17 | a | 65.74 | 64.37 | 52.32 | 44.44 | 38.38 | b | 26.77 | a | 45.51 | |||||||||
1971 | 32.02 | 34.80 | 33.69 | 42.25 | 51.68 | a | 54.25 | 63.69 | 69.53 | 54.22 | 45.57 | b | 39.65 | f | 28.59 | c | 46.39 | a | ||||||||
1972 | 31.88 | g | 33.46 | a | 41.26 | 39.23 | 49.13 | 59.04 | c | 65.27 | a | 63.33 | b | 51.70 | b | 45.71 | b | 36.75 | 22.16 | 46.09 | a | |||||
1973 | 28.07 | a | 35.38 | 35.73 | 42.77 | 54.76 | 59.08 | 65.50 | 63.42 | 56.92 | 46.55 | a | 36.10 | a | 34.10 | 46.53 | ||||||||||
1974 | 27.11 | 34.72 | a | 36.52 | 41.71 | a | 49.44 | 63.17 | 65.03 | 66.34 | 58.67 | 46.63 | a | 38.62 | 32.32 | 46.69 | ||||||||||
1975 | 31.98 | 33.56 | a | 34.81 | 36.20 | 49.21 | 55.62 | 66.52 | 60.03 | 58.68 | 48.17 | a | 34.32 | 35.52 | a | 45.38 | ||||||||||
1976 | 34.55 | i | 30.97 | l | 35.24 | 40.83 | 51.97 | 54.45 | 64.44 | 59.61 | 58.22 | a | 48.19 | 40.52 | 31.44 | 48.49 | b | |||||||||
1977 | 28.10 | 37.36 | 35.15 | 47.10 | 45.81 | 62.27 | 64.18 | 67.89 | 56.40 | 48.61 | 37.95 | 34.68 | 47.12 | |||||||||||||
1978 | 36.84 | 35.98 | b | 43.05 | 40.98 | 48.34 | 58.05 | 64.03 | 62.24 | 52.64 | a | 49.95 | a | 32.17 | ----- | z | 47.66 | a | ||||||||
1979 | 18.44 | n | 34.31 | g | 40.55 | i | 42.03 | n | 49.89 | m | ----- | z | 64.65 | 63.40 | 60.62 | b | 50.84 | 35.47 | n | 40.96 | r | 59.88 | h | |||
1980 | 29.48 | a | 38.00 | d | 37.08 | 45.67 | a | 49.65 | a | 52.46 | b | 65.02 | 59.50 | a | 56.84 | a | 47.26 | 37.40 | 34.02 | d | 46.03 | |||||
1981 | 33.64 | c | 35.10 | c | 35.48 | b | 44.26 | c | 49.47 | 56.50 | 60.91 | b | 65.66 | b | 56.52 | a | 45.06 | 36.88 | a | 33.13 | a | 46.05 | ||||
1982 | 26.42 | g | 30.95 | 34.76 | d | 37.38 | f | 47.58 | a | 57.55 | a | 61.34 | c | 62.98 | 53.41 | g | 46.38 | j | 32.45 | a | 25.60 | b | 44.15 | d | ||
1983 | 34.15 | e | 36.00 | 39.17 | a | 38.26 | c | 51.38 | c | 54.69 | a | 59.43 | b | 63.87 | a | 53.27 | 48.93 | d | 36.74 | c | 30.58 | g | 46.90 | a | ||
1984 | 29.45 | a | 34.65 | f | 40.90 | f | 38.98 | a | 49.97 | a | 52.70 | 65.05 | 63.84 | 54.03 | 42.04 | d | 34.33 | c | 23.61 | c | 45.40 | b | ||||
1985 | 23.61 | 30.24 | c | 33.50 | j | 47.13 | 50.52 | a | 57.75 | ----- | z | 59.00 | d | 51.32 | s | 44.04 | e | 25.96 | g | 23.32 | a | 41.95 | d | |||
1986 | 34.33 | a | 34.80 | c | 40.21 | 40.11 | b | 49.59 | c | 62.03 | a | 57.88 | a | 66.47 | 50.07 | 46.50 | b | 39.57 | a | 29.62 | a | 45.93 | ||||
1987 | 25.63 | a | 31.15 | e | 36.52 | a | 48.62 | 52.95 | b | 60.05 | 59.38 | a | 61.44 | ----- | z | 48.93 | a | 37.00 | c | 28.73 | g | 46.17 | b | |||
1988 | 24.03 | b | 34.72 | d | 36.00 | a | 48.69 | c | 49.15 | 57.97 | 64.98 | 62.50 | b | 55.26 | a | 52.74 | f | 36.30 | b | 29.31 | b | 45.36 | a | |||
1989 | 29.90 | g | 20.94 | d | 39.62 | a | 47.85 | 48.36 | c | 58.61 | b | 62.75 | c | 59.65 | 55.10 | a | 44.41 | c | 36.76 | g | 28.89 | 46.62 | b | |||
1990 | 30.09 | i | 30.34 | 39.57 | b | 47.96 | b | 46.06 | 56.30 | 65.55 | 64.11 | 59.08 | 48.91 | c | 36.52 | i | 23.69 | j | 50.88 | c | ||||||
1991 | 29.96 | f | 37.00 | k | 33.47 | 39.68 | 45.77 | 53.50 | g | 65.74 | 68.61 | l | 59.61 | c | 48.62 | e | 39.08 | 34.63 | l | 47.43 | e | |||||
1992 | 32.55 | l | 40.66 | 42.76 | 48.00 | 57.07 | c | 62.48 | h | 63.46 | g | 66.20 | c | 56.87 | k | 49.60 | f | 34.70 | e | 22.58 | m | 48.23 | f | |||
1993 | 16.14 | m | 14.36 | f | 37.92 | l | 40.09 | s | 52.69 | m | 54.12 | r | 56.19 | j | 59.69 | g | 56.67 | f | 49.48 | i | 29.33 | f | 28.91 | o | ----- | z |
1994 | 31.89 | d | 31.36 | c | 37.93 | h | 45.11 | h | 51.27 | 54.15 | d | 66.77 | 63.02 | a | 57.58 | d | 42.74 | f | 25.60 | i | 28.60 | j | 50.86 | e | ||
1995 | 32.15 | h | 38.93 | f | 34.23 | g | 39.12 | f | 49.78 | d | 54.88 | d | 63.16 | b | 59.98 | d | 57.78 | a | 43.53 | a | 39.73 | d | 33.53 | n | 52.69 | e |
1996 | 29.77 | g | 33.08 | d | 38.05 | 42.71 | a | 46.11 | 52.42 | d | 65.87 | 65.23 | 53.58 | 44.26 | 39.02 | b | 33.75 | i | 48.03 | b | ||||||
1997 | 31.29 | c | 33.19 | a | 40.45 | a | 39.20 | e | 55.88 | e | 56.37 | d | 64.84 | i | 66.57 | h | 57.33 | j | 44.76 | j | 35.80 | h | 26.25 | k | 42.73 | f |
1998 | 33.42 | e | 34.75 | p | 37.94 | g | 38.54 | f | 42.09 | o | 54.84 | a | 67.42 | 66.06 | 59.39 | b | 43.39 | d | 37.06 | c | 27.04 | g | 51.66 | e | ||
1999 | 34.58 | f | 31.45 | h | 37.50 | h | 41.61 | h | 49.92 | f | 55.78 | 61.45 | a | 63.23 | e | 55.83 | i | 47.16 | f | 41.97 | k | 29.98 | f | 60.15 | i | |
2000 | 31.76 | h | 35.85 | e | 38.32 | c | 45.48 | j | 49.92 | f | 60.83 | a | 65.21 | c | 64.96 | h | 53.16 | h | 44.29 | j | 30.27 | j | 28.74 | l | 50.05 | h |
2001 | 29.16 | l | 29.94 | j | 41.40 | g | 36.40 | j | 53.06 | g | 55.98 | d | 62.72 | h | 66.75 | i | 57.87 | g | 46.67 | k | 32.57 | i | 28.36 | f | 55.98 | k |
2002 | 28.00 | l | 33.15 | k | 36.48 | j | 44.31 | i | 48.89 | i | 60.50 | d | 68.69 | e | 60.85 | h | 53.55 | i | 40.28 | m | 34.48 | j | 30.75 | m | 64.60 | j |
2003 | 33.71 | j | 31.08 | i | 38.56 | d | 38.18 | b | 45.69 | r | 59.78 | 68.23 | 62.70 | d | 56.10 | e | 47.70 | i | 31.16 | k | 31.92 | l | 53.92 | f | ||
2004 | 31.75 | i | 32.10 | h | 43.04 | e | 43.78 | a | 48.65 | a | 57.19 | a | 64.91 | c | 63.30 | f | 52.91 | h | 44.25 | i | 34.02 | h | 32.50 | h | 51.51 | g |
2005 | 32.10 | k | 29.97 | k | 39.72 | h | 42.39 | h | 50.11 | d | 52.45 | a | 66.18 | c | 64.65 | e | 50.64 | i | 45.20 | k | 34.15 | j | 26.22 | h | 58.35 | h |
2006 | 32.80 | k | 30.92 | i | 33.64 | c | 43.46 | d | 52.34 | 61.66 | a | 69.21 | 60.12 | a | 57.94 | c | 43.62 | j | 36.10 | j | 27.16 | l | 54.05 | e | ||
2007 | 25.98 | i | 33.67 | e | 41.24 | d | 42.46 | c | 52.28 | a | 59.79 | a | 70.73 | a | 65.84 | b | 56.11 | b | 42.54 | g | 34.50 | i | 25.74 | l | 52.77 | d |
2008 | 23.56 | m | 33.75 | c | 35.22 | a | 38.73 | 49.80 | a | 55.14 | a | 65.15 | 63.77 | 56.18 | 45.34 | 39.33 | 25.90 | 46.21 | a | |||||||
2009 | 30.83 | a | 32.89 | 34.92 | 42.17 | a | 52.56 | 57.35 | 67.18 | 64.27 | 59.62 | 43.40 | 35.43 | 25.39 | h | 47.33 | a | |||||||||
2010 | 36.77 | 35.48 | 37.15 | a | 40.02 | 45.53 | 56.28 | 66.21 | 63.55 | 57.68 | 47.92 | 35.43 | 30.63 | 46.06 | ||||||||||||
2011 | 29.18 | 30.79 | 36.26 | 37.70 | 44.27 | 54.12 | 61.79 | 63.92 | 60.15 | j | 44.52 | k | 34.36 | s | 27.96 | s | 44.75 | d | ||||||||
2012 | 30.46 | e | 33.16 | 36.55 | 44.62 | 48.08 | 48.96 | c | 59.74 | b | 62.61 | 57.73 | 47.00 | 37.12 | 30.42 | 44.70 | ||||||||||
2013 | 23.98 | 35.14 | 38.52 | 36.32 | 41.60 | 48.98 | a | 61.90 | 57.57 | a | 50.27 | b | 45.21 | q | 37.17 | 21.17 | j | 43.14 | b | |||||||
2014 | 33.22 | b | 37.84 | f | 41.07 | b | 45.98 | 48.23 | 55.18 | 69.55 | 63.35 | 58.23 | 50.81 | 38.70 | 35.00 | 49.03 | a | |||||||||
2015 | 36.26 | 38.00 | 42.39 | 44.75 | p | 51.14 | b | 63.68 | b | 65.87 | 64.73 | 55.96 | c | 52.11 | 30.62 | 29.58 | 48.21 | a | ||||||||
2016 | 30.03 | 38.95 | 39.10 | 47.53 | 51.02 | 58.18 | 62.68 | 64.34 | 54.85 | 45.98 | 41.23 | 24.82 | 46.56 | |||||||||||||
2017 | 21.29 | 32.86 | 37.36 | t | 42.56 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.07 | j | ||
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.36 | t | 37.22 | 31.18 | q | 37.22 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.28 | 33.95 | 37.79 | 42.48 | 49.76 | 56.99 | 64.61 | 63.32 | 56.20 | 46.66 | 36.94 | 29.58 | 46.03 | |||||||||||||
S.D. | 4.06 | 3.45 | 2.80 | 3.80 | 3.08 | 3.46 | 2.82 | 2.51 | 2.69 | 2.57 | 2.44 | 3.90 | 0.65 | |||||||||||||
SKEW | -0.38 | -1.32 | 0.37 | 0.13 | -0.10 | -0.20 | -0.26 | -0.10 | -0.62 | 0.20 | -0.69 | -0.26 | -0.29 | |||||||||||||
MAX | 36.84 | 40.66 | 43.05 | 48.69 | 57.07 | 63.68 | 70.73 | 69.53 | 60.62 | 52.11 | 41.23 | 35.52 | 47.12 | |||||||||||||
MIN | 21.29 | 20.94 | 33.47 | 36.20 | 41.60 | 48.96 | 57.88 | 57.57 | 50.07 | 42.04 | 30.62 | 22.16 | 44.70 | |||||||||||||
YRS | 28 | 34 | 37 | 36 | 40 | 44 | 43 | 41 | 35 | 31 | 31 | 24 | 12 |