YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1961 | ----- | z | 42.48 | h | 43.46 | d | 48.90 | a | 54.89 | 67.80 | 71.48 | 73.76 | 56.71 | a | 49.26 | 36.33 | a | 33.35 | 53.59 | b | ||||||
1962 | 27.72 | b | 36.02 | 39.47 | b | 51.47 | 52.66 | 61.20 | 67.63 | 65.40 | 61.40 | 49.87 | 41.20 | b | 34.73 | a | 49.06 | |||||||||
1963 | 24.30 | c | 42.09 | a | 42.08 | 44.82 | 56.81 | 60.56 | v | 64.74 | 67.17 | d | 65.26 | a | 53.38 | b | 42.08 | 32.81 | 48.69 | a | ||||||
1964 | 34.21 | b | 36.43 | 39.27 | 45.85 | 52.69 | ----- | z | 69.19 | ----- | z | 57.15 | 52.97 | 38.82 | 34.04 | c | 46.06 | b | ||||||||
1965 | 33.66 | 39.30 | a | 39.97 | 50.62 | 53.55 | ----- | z | 68.18 | 67.45 | 55.18 | 53.84 | 44.83 | 31.00 | 48.87 | a | ||||||||||
1966 | 34.19 | 35.83 | a | 42.56 | 51.10 | 59.21 | 61.87 | 68.55 | a | 68.13 | 62.35 | 50.38 | a | 44.40 | 36.89 | 51.29 | ||||||||||
1967 | 38.40 | a | 39.96 | a | 41.69 | d | 43.81 | a | 56.08 | a | 64.05 | 71.60 | 73.26 | b | 66.05 | 51.55 | b | 42.35 | 32.05 | a | 51.74 | |||||
1968 | 33.77 | 43.10 | 47.32 | 46.30 | 55.98 | a | 64.45 | 72.86 | b | 65.34 | b | 61.10 | 49.66 | 40.80 | 35.23 | a | 51.33 | |||||||||
1969 | 28.00 | 34.18 | 42.03 | 48.82 | 59.27 | 66.58 | 68.29 | 67.82 | 62.15 | 46.06 | 40.45 | 35.62 | c | 49.94 | ||||||||||||
1970 | 37.00 | c | 40.41 | 41.77 | a | 43.36 | a | 55.98 | 67.55 | 71.90 | 70.16 | 56.34 | a | 48.37 | 42.25 | 32.97 | 50.67 | |||||||||
1971 | 35.48 | 38.07 | 39.42 | a | 47.60 | a | 56.11 | 59.48 | a | 70.50 | 74.31 | 56.87 | 46.73 | 39.28 | a | 32.23 | 49.67 | |||||||||
1972 | 31.27 | a | 37.48 | 45.06 | 45.36 | a | 57.02 | 64.18 | 69.00 | 69.94 | 56.90 | 48.56 | 39.97 | 25.98 | 49.23 | |||||||||||
1973 | 29.53 | a | 39.59 | 42.94 | 47.62 | 58.45 | 63.63 | 69.71 | 68.11 | 61.58 | 49.48 | 41.66 | a | 38.81 | 50.93 | |||||||||||
1974 | 30.53 | a | 38.98 | 42.11 | 47.45 | 53.68 | 67.53 | 69.37 | 68.60 | 62.75 | 51.13 | 41.80 | 34.56 | 50.71 | ||||||||||||
1975 | 34.37 | 37.04 | 40.34 | 42.98 | 53.90 | 61.47 | 72.76 | 65.58 | 62.28 | 50.26 | 39.33 | 35.03 | 49.61 | |||||||||||||
1976 | 33.97 | a | 36.33 | 41.18 | 47.07 | 56.12 | e | 58.79 | i | 69.28 | k | 65.92 | 63.53 | 50.71 | 42.10 | 32.76 | 46.97 | b | ||||||||
1977 | 25.89 | 40.04 | 40.56 | 52.00 | 51.81 | 66.08 | 69.42 | 72.29 | 58.30 | e | 50.32 | 37.95 | 37.66 | 50.19 | ||||||||||||
1978 | 36.55 | 40.23 | 47.31 | 48.58 | 52.06 | 63.73 | 69.92 | 67.77 | 58.40 | a | 51.79 | 33.37 | 25.52 | a | 49.60 | |||||||||||
1979 | 17.23 | a | 33.75 | 44.71 | 48.37 | 56.89 | 63.57 | 71.50 | 69.66 | 65.13 | 53.76 | 36.70 | 35.81 | o | 51.02 | a | ||||||||||
1980 | 29.79 | 39.19 | 41.69 | b | 50.83 | 55.81 | 60.20 | 70.11 | 65.55 | 62.05 | 50.22 | a | 42.12 | d | 36.61 | 50.35 | ||||||||||
1981 | 37.19 | 38.62 | 44.39 | 50.20 | 55.82 | 62.47 | 67.16 | 71.52 | 62.38 | 49.29 | b | 42.60 | 37.02 | a | 51.56 | |||||||||||
1982 | 29.58 | f | 33.81 | a | 42.27 | 44.88 | 53.90 | 65.47 | 68.75 | a | 70.62 | a | 58.70 | 48.63 | a | 36.31 | c | 35.14 | b | 50.77 | a | |||||
1983 | 36.18 | c | 41.29 | b | 46.04 | c | 47.12 | a | 57.15 | 61.68 | 67.13 | a | 71.34 | 58.32 | 49.78 | b | 42.89 | c | 25.80 | a | 50.39 | |||||
1984 | 31.12 | a | 38.19 | 44.71 | 46.60 | 54.52 | 59.72 | a | 71.03 | 71.60 | 60.52 | a | 47.23 | a | 41.10 | 28.72 | a | 49.59 | ||||||||
1985 | 26.63 | 30.56 | a | 40.23 | 52.50 | a | 58.48 | 64.90 | 74.66 | 65.55 | i | 55.78 | a | 47.55 | b | 29.84 | b | 21.87 | 45.73 | a | ||||||
1986 | 35.97 | a | 40.50 | b | 48.16 | 49.48 | 57.13 | 69.32 | 66.68 | 73.92 | 57.55 | 51.40 | k | 42.00 | a | 34.08 | a | 52.25 | a | |||||||
1987 | 28.15 | a | 38.82 | 44.82 | 54.55 | 59.13 | 66.50 | 68.66 | 67.18 | 64.80 | e | 53.42 | 42.40 | e | 34.37 | e | 51.90 | |||||||||
1988 | 31.22 | a | 38.21 | c | 42.46 | d | 52.17 | 56.94 | 64.33 | 70.37 | 68.13 | e | 61.58 | d | 59.19 | j | 41.88 | m | 32.70 | i | 53.93 | c | ||||
1989 | 30.08 | l | 24.52 | f | 43.58 | a | 52.72 | 55.46 | h | 65.66 | k | 71.43 | j | 66.33 | h | 59.34 | k | 49.10 | k | 39.86 | l | 32.58 | m | 48.15 | j | |
1990 | 37.85 | k | 36.10 | m | 43.98 | j | 53.07 | i | 53.90 | j | 63.83 | i | 72.10 | j | 69.87 | h | 66.45 | k | 49.54 | h | 38.18 | p | 28.34 | o | ----- | z |
1991 | 27.44 | n | 42.58 | j | 39.81 | o | 47.79 | k | 52.17 | j | 58.47 | m | 70.55 | k | 71.64 | j | 64.58 | k | 49.13 | h | 41.94 | m | 35.56 | n | ----- | z |
1992 | 37.42 | l | 42.53 | m | 47.24 | n | 53.02 | j | 61.59 | n | 68.35 | j | 68.20 | k | 70.93 | j | 62.73 | j | 51.21 | j | 38.77 | o | 32.77 | p | ----- | z |
1993 | 24.11 | v | 28.76 | k | 43.36 | j | 47.62 | i | 61.90 | k | 60.03 | l | 63.50 | l | 66.48 | i | 59.62 | j | 52.45 | l | 33.75 | n | 35.83 | m | ----- | z |
1994 | 37.83 | m | 36.03 | k | 46.45 | j | 49.82 | m | 59.39 | m | 63.32 | k | 73.53 | m | 70.13 | h | 65.21 | k | 48.78 | m | 36.44 | m | 30.58 | m | ----- | z |
1995 | 36.83 | m | 40.77 | m | 44.62 | k | 48.12 | m | 56.58 | m | 61.10 | j | 71.21 | l | 67.21 | j | 61.58 | k | 47.89 | i | 42.74 | m | 39.07 | q | ----- | z |
1996 | 33.71 | q | 35.86 | o | 44.08 | l | 50.76 | k | 52.79 | n | 61.86 | l | 72.57 | i | 70.43 | j | 60.41 | n | 50.98 | i | 42.54 | p | 35.82 | n | ----- | z |
1997 | 32.32 | l | 37.66 | l | 47.08 | m | 50.11 | k | 62.62 | n | 62.14 | l | 69.76 | l | 72.70 | k | 64.33 | j | 50.31 | m | 43.12 | q | 33.50 | p | ----- | z |
1998 | 33.44 | m | 39.88 | k | 44.89 | l | 51.17 | o | 53.87 | l | 62.03 | k | 75.38 | k | 72.31 | j | 66.74 | i | 50.15 | k | 41.90 | o | 33.10 | p | ----- | z |
1999 | 35.64 | m | 37.61 | n | 42.03 | l | 44.71 | m | 53.69 | m | 62.94 | m | 69.95 | l | 70.60 | g | 59.89 | h | 50.32 | f | 45.57 | g | 35.33 | k | ----- | z |
2000 | 33.21 | j | 41.48 | h | 43.81 | j | 53.40 | j | 55.71 | j | 64.46 | g | 70.19 | j | 69.43 | i | 61.17 | g | 49.14 | i | 34.76 | k | 32.22 | o | ----- | z |
2001 | 33.93 | j | 36.50 | i | 44.79 | j | 48.19 | i | 60.00 | g | 63.16 | h | 69.05 | j | 72.73 | i | 63.87 | k | 50.11 | h | 42.17 | o | 34.14 | i | ----- | z |
2002 | 35.14 | i | 38.08 | j | 41.21 | j | 48.33 | j | 55.48 | i | 67.57 | i | 75.21 | j | 67.32 | i | 61.64 | l | 46.48 | i | 39.29 | m | 36.38 | o | ----- | z |
2003 | 38.39 | i | 36.65 | h | 47.34 | l | 49.65 | j | 59.00 | k | 67.00 | j | 78.08 | f | 74.12 | j | 65.10 | i | 54.89 | i | 38.88 | r | 36.94 | m | ----- | z |
2004 | 31.84 | l | 39.74 | h | 48.59 | h | 52.43 | h | 56.62 | k | 66.39 | h | 73.52 | i | 73.07 | i | 59.68 | h | 51.57 | j | 39.81 | l | 34.27 | k | ----- | z |
2005 | 34.86 | j | 36.79 | i | 45.18 | i | 49.05 | h | 58.29 | j | 61.66 | h | 73.82 | i | 70.35 | g | 60.20 | g | 52.76 | j | 37.17 | l | 31.05 | l | ----- | z |
2006 | 37.50 | l | 35.85 | h | 42.70 | h | 49.91 | n | 59.80 | h | 65.91 | m | 75.06 | n | 68.95 | l | 62.85 | m | 48.11 | l | 40.40 | o | 34.59 | n | ----- | z |
2007 | 29.95 | l | 39.50 | l | 45.84 | l | 48.66 | k | 60.10 | f | 65.97 | m | 76.19 | m | 70.98 | h | 60.39 | l | 50.95 | l | 38.47 | l | 38.03 | p | ----- | z |
2008 | 28.09 | n | 39.21 | j | 41.14 | i | 45.31 | l | 55.64 | q | 61.45 | k | 71.36 | i | 71.95 | b | 62.92 | k | 51.00 | j | 44.38 | m | 30.86 | i | 71.95 | k |
2009 | 32.95 | l | 38.59 | k | 40.00 | i | 47.98 | i | 56.53 | l | 67.38 | j | 73.45 | k | 74.54 | h | 67.00 | i | 47.13 | l | 41.22 | l | 27.90 | j | ----- | z |
2010 | 39.29 | n | 40.31 | j | 43.52 | i | 49.66 | k | 50.59 | n | 61.40 | i | 71.03 | m | 70.25 | i | 64.55 | k | 52.97 | l | 40.17 | l | 34.82 | l | ----- | z |
2011 | 34.12 | k | 36.16 | l | 43.03 | n | 46.09 | s | 54.36 | j | 63.19 | l | 70.28 | m | 72.84 | o | 68.26 | k | 54.09 | n | 40.80 | t | 30.95 | l | ----- | z |
2012 | 38.11 | v | 38.37 | j | 44.53 | p | 53.24 | k | 58.18 | n | 61.53 | l | 75.11 | l | 73.76 | h | 64.58 | l | 51.91 | n | 45.10 | t | 34.68 | q | ----- | z |
2013 | 28.20 | i | 37.35 | k | 45.62 | k | 48.43 | i | 57.05 | j | 64.55 | j | 76.33 | k | 73.73 | i | 64.95 | j | 48.50 | n | 37.15 | t | 25.37 | l | ----- | z |
2014 | 35.07 | i | 35.41 | k | 45.98 | j | 52.02 | j | 60.44 | n | 65.83 | l | 78.31 | o | 74.25 | s | 67.11 | k | 59.22 | o | 37.44 | v | 39.00 | w | ----- | z |
2015 | 39.28 | m | 47.12 | o | 52.28 | v | 51.29 | i | 60.22 | m | 72.50 | m | 75.30 | k | 74.31 | m | 65.53 | n | 61.12 | s | 42.50 | t | 39.42 | m | ----- | z |
2016 | 38.88 | o | 43.25 | m | 46.58 | k | 57.28 | u | 59.33 | v | 65.97 | 70.68 | a | 70.61 | 60.85 | 53.15 | 47.12 | 25.32 | 56.24 | e | ||||||
2017 | 29.28 | m | 39.66 | 46.19 | 49.15 | 58.89 | 63.78 | e | 74.98 | 74.03 | 64.10 | 48.94 | e | 42.43 | ----- | z | 56.22 | b | ||||||||
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 | 70.74 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.74 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.63 | 38.13 | 42.93 | 48.41 | 55.89 | 64.14 | 69.92 | 69.56 | 60.54 | 50.22 | 40.50 | 32.60 | 50.43 | |||||||||||||
S.D. | 4.85 | 2.78 | 2.49 | 3.01 | 2.20 | 2.62 | 2.27 | 2.86 | 3.14 | 2.16 | 3.49 | 4.34 | 0.89 | |||||||||||||
SKEW | -0.99 | -0.74 | 0.42 | 0.02 | -0.19 | -0.03 | 0.19 | 0.13 | -0.04 | 0.10 | -1.11 | -0.93 | 0.15 | |||||||||||||
MAX | 38.40 | 43.10 | 48.16 | 54.55 | 59.27 | 69.32 | 74.98 | 74.31 | 66.05 | 53.84 | 47.12 | 38.81 | 51.90 | |||||||||||||
MIN | 17.23 | 30.56 | 39.27 | 42.98 | 51.81 | 59.48 | 64.74 | 65.34 | 55.18 | 46.06 | 29.84 | 21.87 | 49.06 | |||||||||||||
YRS | 26 | 28 | 30 | 30 | 29 | 26 | 30 | 29 | 30 | 28 | 29 | 27 | 18 |