YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1956 | ----- | z | ----- | z | ----- | z | 57.89 | k | 66.77 | 79.70 | 85.23 | 79.19 | 76.83 | 60.48 | 39.13 | 35.35 | 65.34 | d | ||||||||
1957 | 22.84 | 39.75 | 45.00 | 52.27 | 66.32 | 74.07 | 86.30 | d | 84.00 | 73.50 | f | 58.83 | a | 38.52 | a | 38.63 | d | 55.14 | a | |||||||
1958 | 35.87 | 44.04 | 42.58 | 52.73 | 74.94 | 75.27 | 79.58 | 86.26 | 73.90 | 64.74 | 43.21 | a | 38.77 | 59.32 | ||||||||||||
1959 | 33.81 | 32.93 | 43.71 | 54.83 | a | 60.74 | 79.53 | 86.42 | 84.19 | 68.97 | 59.14 | i | 44.10 | 37.19 | 56.95 | a | ||||||||||
1960 | 33.77 | 30.00 | ----- | z | ----- | z | ----- | z | 81.62 | q | 91.55 | 83.57 | a | 76.90 | 62.17 | h | 43.63 | 37.53 | a | 56.71 | e | |||||
1961 | 38.58 | 46.45 | q | ----- | z | 53.78 | g | 68.68 | 85.47 | 88.10 | a | 86.29 | 62.97 | 57.53 | a | 43.60 | 31.55 | 62.53 | c | |||||||
1962 | 24.17 | a | 35.46 | 42.77 | 60.60 | 64.52 | 75.50 | 81.74 | 81.97 | 74.77 | 67.55 | 49.20 | 39.77 | a | 58.17 | |||||||||||
1963 | 23.90 | 46.68 | 49.43 | a | 54.00 | c | 66.74 | 72.03 | 86.61 | 85.79 | c | 77.26 | k | 66.89 | c | 45.92 | f | 33.57 | a | 58.56 | b | |||||
1964 | 32.15 | d | 32.56 | b | 38.06 | 54.87 | 65.97 | b | 70.57 | 89.43 | a | 81.00 | a | 73.45 | a | 66.97 | 42.63 | 34.13 | 56.81 | |||||||
1965 | 36.16 | 36.46 | 36.13 | 55.97 | 63.03 | a | 73.63 | 83.81 | 81.32 | 61.62 | a | 67.68 | 48.43 | 38.10 | 56.86 | |||||||||||
1966 | 32.97 | a | 36.70 | a | 48.32 | 53.41 | a | 72.35 | 74.47 | 90.97 | 82.58 | 77.13 | 59.71 | 44.48 | a | 33.29 | 58.87 | |||||||||
1967 | 35.45 | 37.81 | a | 43.03 | a | 51.37 | 64.74 | 70.70 | 85.84 | 87.87 | 79.60 | 59.82 | c | 44.17 | 25.87 | a | 57.19 | |||||||||
1968 | 29.90 | 39.44 | b | 50.26 | 51.50 | 62.03 | 73.23 | 86.61 | 76.65 | 71.70 | 62.13 | 40.60 | e | 32.13 | 56.35 | |||||||||||
1969 | 33.81 | 37.39 | 43.90 | 61.81 | d | 71.19 | 72.30 | 85.19 | 90.23 | 78.67 | 51.34 | b | 45.96 | b | 36.34 | b | 59.01 | |||||||||
1970 | 34.35 | 45.25 | 41.10 | a | 47.07 | a | 67.32 | 78.07 | a | 86.77 | 90.03 | 67.00 | 55.63 | d | 42.93 | c | 31.86 | b | 57.28 | |||||||
1971 | 32.77 | a | 39.04 | b | 42.11 | c | 54.87 | 66.63 | a | 75.87 | 84.32 | 91.03 | 67.22 | c | 57.45 | 43.47 | 31.54 | e | 57.19 | |||||||
1972 | 32.37 | d | 40.04 | f | 52.85 | d | 57.20 | e | 66.58 | e | 77.35 | g | 83.03 | b | 83.77 | 67.32 | b | 59.81 | e | 40.71 | b | 24.59 | d | 56.82 | b | |
1973 | 31.27 | e | 42.58 | d | 46.63 | d | 51.15 | c | 66.30 | d | 78.70 | g | ----- | z | 86.13 | 70.47 | 61.30 | a | 41.03 | 36.23 | 53.31 | b | ||||
1974 | 31.13 | 39.41 | a | 43.46 | c | 58.20 | 62.97 | 81.70 | 89.03 | 80.35 | 76.47 | 65.42 | 45.60 | 33.06 | 58.90 | |||||||||||
1975 | 30.87 | 36.00 | 40.87 | 44.60 | 60.30 | a | 70.47 | 86.61 | 79.87 | 75.73 | 59.42 | 42.03 | 38.00 | a | 55.40 | |||||||||||
1976 | 35.45 | 37.27 | c | 44.05 | k | 56.77 | h | 70.95 | l | 74.76 | e | 87.40 | a | 80.76 | b | 74.48 | c | 58.63 | d | 46.44 | c | 33.17 | a | 58.71 | c | |
1977 | 30.29 | 41.50 | b | 43.23 | 64.55 | a | 62.35 | 79.73 | 82.57 | a | 80.19 | 72.00 | 65.73 | i | 43.93 | b | 34.30 | a | 57.69 | a | ||||||
1978 | 34.00 | a | 35.30 | a | 50.10 | b | 54.70 | 61.90 | 76.76 | a | 84.65 | 81.26 | ----- | z | 66.89 | c | 35.19 | d | 25.23 | a | 55.09 | a | ||||
1979 | 21.31 | b | 35.19 | b | 46.88 | f | 54.79 | a | 66.77 | a | 77.83 | a | 85.42 | 81.77 | a | 81.21 | a | 66.14 | j | 37.56 | e | 39.32 | 58.12 | b | ||
1980 | 32.52 | j | 43.62 | m | 42.24 | n | 60.53 | k | 66.04 | d | ----- | z | 85.34 | b | 78.55 | 73.41 | c | 65.43 | h | 46.73 | h | 41.74 | 69.02 | g | ||
1981 | 44.24 | b | 41.57 | 50.97 | 56.79 | b | 63.68 | 72.21 | f | 85.42 | 87.84 | 78.67 | 56.42 | e | 48.69 | a | 35.83 | a | 59.10 | a | ||||||
1982 | 29.93 | c | 34.78 | e | 41.78 | d | 50.56 | c | 65.65 | h | 71.41 | c | 81.50 | a | 87.42 | 71.53 | 54.57 | c | 38.09 | g | 31.32 | c | 55.48 | b | ||
1983 | 39.07 | b | 44.87 | e | 49.24 | b | 53.28 | a | 62.12 | e | 73.43 | b | 82.79 | b | 83.76 | b | 71.07 | b | 62.07 | a | 40.90 | 26.87 | h | 60.24 | a | |
1984 | 32.32 | c | 41.27 | c | 45.10 | b | 52.54 | b | 67.44 | d | ----- | z | 84.11 | d | 84.03 | a | 68.53 | ----- | z | ----- | z | ----- | z | 59.42 | d | |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.29 | 34.29 | k | |
1987 | 32.47 | a | 42.36 | 49.48 | b | 69.50 | b | 72.57 | a | 80.90 | a | 81.76 | b | 80.55 | ----- | z | 66.30 | a | ----- | z | 34.21 | b | 61.01 | b | ||
1988 | 29.30 | a | 40.14 | 45.93 | a | 62.86 | b | 72.42 | 87.86 | a | 91.50 | a | 88.06 | 74.69 | d | 68.10 | 39.89 | c | 32.13 | a | 61.07 | |||||
1989 | 31.25 | c | 26.39 | e | 47.78 | d | 59.52 | a | 66.59 | b | 77.00 | a | 91.72 | b | 82.55 | 75.59 | a | 57.10 | 42.17 | a | 30.50 | c | 57.35 | |||
1990 | 33.13 | a | 35.75 | 50.33 | a | 60.53 | 63.21 | b | 77.00 | 86.90 | b | 85.48 | b | 80.97 | 57.97 | 45.17 | a | 21.88 | g | 61.49 | a | |||||
1991 | ----- | z | ----- | z | 46.13 | 51.50 | 63.55 | 75.83 | a | 88.35 | 88.19 | 73.10 | 58.93 | a | 37.23 | 34.55 | 61.74 | b | ||||||||
1992 | 36.77 | a | 46.96 | b | 56.23 | 62.52 | a | 73.78 | d | 77.85 | c | 79.10 | a | 84.48 | 75.04 | d | 64.97 | a | 38.86 | a | 30.70 | a | 60.60 | |||
1993 | 31.77 | 34.85 | a | 51.39 | c | 54.72 | a | 71.03 | a | 70.18 | b | 74.27 | e | 78.77 | e | 72.80 | e | 60.07 | d | 38.84 | e | 34.23 | e | 56.08 | ||
1994 | 39.59 | d | 35.08 | c | 52.75 | g | 61.88 | f | 72.15 | e | 79.46 | f | 86.64 | c | 88.32 | c | 80.70 | c | 56.78 | d | 37.70 | 36.63 | a | 59.29 | c | |
1995 | 35.55 | 44.92 | c | 45.53 | a | 54.57 | b | 65.17 | g | 74.62 | f | 84.39 | m | 86.63 | a | 73.96 | b | 54.93 | a | 46.93 | a | 37.21 | c | 53.36 | c | |
1996 | 31.42 | 36.90 | 42.65 | 56.62 | a | 60.48 | 81.70 | c | 87.45 | b | 87.29 | 72.96 | b | 60.00 | c | 45.42 | d | 34.64 | f | 60.26 | a | |||||
1997 | 30.25 | c | 38.58 | b | 48.10 | a | 53.44 | e | 70.33 | a | 78.38 | a | 83.83 | b | 83.68 | 75.25 | b | 58.32 | 46.93 | b | 34.19 | 58.44 | ||||
1998 | 36.32 | 41.07 | 48.10 | 58.77 | 70.13 | a | 67.93 | a | 88.17 | a | 87.71 | 78.67 | 60.47 | a | 44.97 | a | 32.39 | c | 59.56 | |||||||
1999 | 35.90 | 39.89 | 49.58 | 54.67 | 64.23 | a | 73.26 | c | 87.20 | a | 85.20 | a | 72.77 | 64.79 | c | 54.90 | 34.50 | a | 59.74 | |||||||
2000 | 36.80 | a | 44.12 | c | 48.80 | a | 62.10 | 66.93 | b | 80.97 | 89.38 | b | 87.86 | c | 72.25 | b | 59.13 | 35.73 | 33.23 | a | 59.77 | |||||
2001 | 33.59 | b | 36.61 | 49.90 | 56.11 | b | 72.89 | c | 79.59 | a | 87.00 | 90.10 | 80.59 | a | 61.93 | a | 50.14 | a | 32.27 | e | 60.89 | |||||
2002 | 32.03 | b | 37.50 | d | 39.76 | b | 53.64 | e | 66.52 | b | 78.54 | f | 90.77 | a | 83.59 | b | 76.07 | 55.38 | b | 41.87 | 37.52 | b | 55.88 | a | ||
2003 | 39.94 | 34.81 | b | 47.96 | c | 58.63 | c | 68.67 | a | 76.73 | 93.27 | a | 90.67 | a | 73.31 | a | 68.10 | b | 38.70 | 37.04 | c | 60.65 | ||||
2004 | 34.16 | 38.35 | c | 54.77 | a | 61.80 | 63.65 | 74.04 | b | 85.10 | 81.16 | 72.27 | d | 59.10 | a | 45.45 | a | 38.27 | a | 59.01 | ||||||
2005 | 35.29 | 42.71 | 48.03 | 57.80 | 65.42 | 72.67 | c | 89.61 | 84.93 | c | 73.72 | a | 62.52 | 41.77 | 30.48 | 58.75 | ||||||||||
2006 | 36.93 | a | 35.96 | a | 46.39 | 58.87 | 70.53 | a | 81.52 | a | 90.45 | 85.61 | 73.52 | a | 56.39 | 43.20 | 34.58 | 59.50 | ||||||||
2007 | 28.90 | 38.82 | 53.70 | a | 50.38 | v | 71.76 | n | 81.80 | 93.74 | 86.16 | 75.90 | 59.10 | 45.40 | 31.47 | a | 59.50 | b | ||||||||
2008 | 29.70 | a | 37.76 | 43.52 | 52.45 | a | 62.87 | 75.03 | 88.33 | a | 87.07 | b | 73.70 | c | 60.57 | c | 47.83 | 29.39 | 57.35 | |||||||
2009 | 33.23 | a | 38.50 | 44.48 | 53.83 | 68.81 | 71.52 | a | 82.54 | c | 83.14 | c | 81.66 | a | 48.45 | b | 45.00 | b | 28.93 | b | 56.67 | |||||
2010 | 36.00 | a | 38.89 | 51.24 | b | 55.35 | d | 59.13 | 73.44 | c | 84.57 | c | 83.04 | f | 76.90 | a | 64.56 | d | 39.10 | a | 33.68 | c | 55.71 | a | ||
2011 | 32.03 | 30.07 | a | 45.10 | 50.33 | 58.74 | 72.93 | 87.32 | 86.55 | 80.33 | 60.84 | 42.10 | 33.55 | 56.66 | ||||||||||||
2012 | 37.10 | 36.31 | 50.71 | 62.17 | 66.03 | a | 79.83 | 89.42 | 88.61 | 78.83 | 57.74 | 45.19 | d | 33.32 | 60.44 | |||||||||||
2013 | 31.13 | 36.18 | 47.65 | 53.13 | 67.35 | 79.57 | 89.10 | 88.03 | a | 73.93 | 54.90 | 46.64 | h | 30.46 | e | 59.22 | a | |||||||||
2014 | 32.92 | r | 30.90 | h | 47.96 | f | 57.00 | f | 69.89 | d | 73.46 | d | 88.42 | 81.26 | d | 76.67 | 64.32 | 40.00 | a | 36.97 | b | 66.37 | d | |||
2015 | 38.67 | a | 43.85 | a | 56.23 | 61.30 | c | 63.57 | a | 85.13 | 85.14 | b | 85.90 | a | 78.13 | 67.19 | d | 35.34 | a | 33.36 | c | 61.15 | ||||
2016 | 34.00 | c | 46.31 | c | 47.96 | c | 64.00 | i | 64.23 | 87.27 | 87.45 | 86.26 | 73.13 | 55.55 | 48.93 | 25.71 | 59.71 | a | ||||||||
2017 | 27.58 | 38.14 | 50.23 | 54.57 | 68.61 | 78.03 | 90.03 | 85.58 | 71.00 | 53.48 | 47.73 | 32.00 | a | 58.08 | ||||||||||||
2018 | 34.97 | 32.67 | a | 47.26 | 57.77 | 70.77 | 76.73 | 88.90 | 83.45 | 73.83 | 55.16 | 38.93 | a | 33.83 | h | 60.04 | a | |||||||||
2019 | 34.20 | a | 22.14 | 39.86 | b | 53.47 | 59.52 | 71.17 | 87.29 | x | 87.20 | a | 78.52 | i | 49.50 | a | 50.29 | f | ----- | z | 52.13 | d | ||||
2020 | ----- | z | ----- | z | ----- | z | ----- | z | 70.27 | a | 75.08 | d | 86.84 | l | 90.80 | p | 79.15 | q | 69.20 | u | ----- | z | 43.54 | r | 72.67 | j |
2021 | ----- | z | 33.47 | k | 55.73 | p | 67.29 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.15 | 38.14 | 46.77 | 55.97 | 66.44 | 76.50 | 86.50 | 84.72 | 74.28 | 60.07 | 43.05 | 33.79 | 58.49 | |||||||||||||
S.D. | 4.17 | 4.84 | 4.42 | 4.55 | 3.99 | 4.49 | 3.57 | 3.36 | 4.25 | 4.76 | 4.08 | 3.65 | 1.63 | |||||||||||||
SKEW | -0.47 | -0.59 | -0.05 | 0.39 | 0.09 | 0.55 | -0.64 | -0.21 | -0.62 | -0.11 | 0.22 | -0.43 | 0.01 | |||||||||||||
MAX | 44.24 | 46.96 | 56.23 | 69.50 | 74.94 | 87.86 | 93.74 | 91.03 | 81.66 | 68.10 | 54.90 | 41.74 | 61.15 | |||||||||||||
MIN | 21.31 | 22.14 | 36.13 | 44.60 | 58.74 | 67.93 | 74.27 | 76.65 | 61.62 | 48.45 | 35.19 | 24.59 | 55.40 | |||||||||||||
YRS | 58 | 56 | 54 | 53 | 58 | 54 | 59 | 61 | 57 | 56 | 55 | 57 | 31 |