YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.19 | 70.16 | 67.15 | 60.00 | 46.92 | 41.32 | 59.46 | f | ||||||
1956 | 40.97 | 37.59 | 47.79 | c | 51.59 | c | 63.17 | a | 71.88 | 71.06 | 68.11 | 66.77 | 56.84 | 40.95 | 36.53 | 54.44 | ||||||||||
1957 | 42.42 | 49.00 | 47.21 | 52.90 | a | 57.00 | 70.07 | 72.90 | 67.94 | 62.52 | 53.53 | 40.03 | 38.52 | 54.50 | ||||||||||||
1958 | 35.94 | 42.19 | a | 41.58 | 51.72 | 59.26 | 69.28 | 69.39 | 67.97 | 62.42 | 51.89 | 42.40 | 38.06 | 52.67 | ||||||||||||
1959 | 38.73 | 39.23 | 44.18 | 53.88 | 59.02 | c | 70.20 | 70.80 | a | 67.47 | 63.10 | ----- | z | 44.20 | 36.88 | a | 53.43 | a | ||||||||
1960 | 30.58 | 37.66 | a | 49.11 | 54.55 | 60.29 | 69.92 | 70.79 | 70.56 | 66.82 | 54.95 | 46.88 | a | 35.87 | 54.00 | |||||||||||
1961 | 37.47 | 42.11 | 47.90 | 55.05 | 62.05 | 71.03 | 71.97 | 69.11 | 63.90 | 53.92 | 42.30 | 39.13 | 54.66 | |||||||||||||
1962 | 37.00 | 44.21 | 42.81 | 56.71 | a | 60.79 | 65.92 | 69.79 | 70.63 | 65.87 | 56.73 | 48.64 | a | 40.42 | 54.96 | |||||||||||
1963 | 37.03 | a | 43.25 | b | 47.02 | 54.21 | a | 61.88 | b | 67.30 | 72.39 | 67.94 | 65.90 | ----- | z | ----- | z | 37.53 | 55.44 | b | ||||||
1964 | 36.00 | 35.88 | 44.68 | 51.55 | 59.74 | 66.88 | 71.60 | a | 69.53 | 62.98 | 55.69 | 43.68 | 39.82 | 53.17 | ||||||||||||
1965 | 40.63 | a | 39.38 | 44.16 | 53.32 | 58.60 | 64.48 | 71.32 | 68.88 | a | 62.32 | 54.06 | 48.62 | 39.74 | 53.79 | |||||||||||
1966 | 33.50 | 35.38 | 46.61 | 53.07 | 61.15 | 67.15 | 71.90 | 69.02 | 63.17 | 53.27 | 48.32 | 36.66 | 53.27 | |||||||||||||
1967 | 37.52 | 42.91 | 50.56 | 54.17 | 58.65 | 68.32 | 70.79 | 68.61 | 63.00 | 55.19 | 46.78 | 34.82 | 54.28 | |||||||||||||
1968 | 39.08 | 44.46 | a | 44.74 | 50.40 | 59.05 | 67.98 | 68.65 | 65.95 | 63.08 | 56.56 | 45.35 | 38.31 | 53.63 | ||||||||||||
1969 | 43.67 | a | 39.88 | 42.95 | 54.55 | 59.42 | 66.67 | 72.06 | 72.29 | 65.20 | 56.15 | 44.15 | 40.27 | 54.77 | ||||||||||||
1970 | 37.15 | 42.79 | 45.24 | 50.85 | 60.58 | 68.52 | 72.53 | a | 69.21 | 62.77 | 51.34 | 46.25 | 42.23 | 54.12 | ||||||||||||
1971 | 38.53 | 41.61 | 48.23 | 51.88 | 59.27 | 68.29 | a | 73.66 | 68.67 | a | 64.35 | 53.07 | a | 44.92 | 37.97 | 54.20 | ||||||||||
1972 | 39.05 | a | 42.64 | 52.42 | 54.23 | 58.92 | 66.77 | 72.26 | 67.84 | 63.77 | 56.71 | 41.70 | 38.63 | 54.58 | ||||||||||||
1973 | 35.65 | 40.27 | 41.84 | 46.87 | 58.35 | 66.35 | 70.10 | 67.81 | 63.12 | 54.97 | 45.92 | 39.12 | a | 52.53 | ||||||||||||
1974 | 39.21 | 38.66 | 49.48 | 52.72 | 61.11 | 71.98 | 69.65 | 67.08 | 63.32 | 54.32 | 43.62 | a | 35.48 | 53.89 | ||||||||||||
1975 | 38.06 | 39.09 | a | 46.19 | 48.77 | 57.03 | 66.83 | 70.06 | 69.15 | 63.13 | 55.18 | 44.28 | 38.82 | 53.05 | ||||||||||||
1976 | 36.76 | 44.84 | 46.11 | 51.78 | 58.98 | 67.23 | 69.29 | 68.16 | 62.38 | 50.56 | 41.38 | 35.84 | 52.78 | |||||||||||||
1977 | 37.15 | 41.27 | 43.29 | 52.05 | 58.73 | 67.30 | 70.48 | a | 70.32 | 65.72 | 57.10 | 47.16 | a | 43.23 | 54.48 | |||||||||||
1978 | 40.37 | 39.98 | 48.48 | 53.12 | 59.03 | 69.70 | 72.45 | 68.45 | 63.80 | 55.77 | 47.48 | 36.53 | 54.60 | |||||||||||||
1979 | 35.97 | 41.38 | 45.81 | 52.70 | 58.32 | 65.91 | a | 71.82 | a | 67.08 | 65.68 | b | 57.95 | 42.62 | 39.27 | 53.71 | ||||||||||
1980 | 41.19 | 42.74 | 45.65 | 52.00 | 58.79 | 71.18 | 73.39 | 69.47 | 64.62 | 52.52 | 44.35 | 41.60 | 54.79 | |||||||||||||
1981 | 39.76 | 42.91 | 44.61 | 55.00 | 60.39 | 70.82 | 71.27 | 68.73 | 63.82 | 55.19 | 47.15 | 43.08 | 55.23 | |||||||||||||
1982 | 41.69 | 43.54 | a | 48.89 | c | 54.61 | c | 58.85 | 66.82 | 71.53 | a | 70.31 | 65.50 | a | 54.16 | 44.72 | 36.43 | b | 54.75 | |||||||
1983 | 37.39 | 42.18 | 45.68 | 48.40 | 59.06 | 65.75 | 71.85 | 70.24 | 67.90 | a | 56.71 | b | 45.75 | 42.95 | 54.49 | |||||||||||
1984 | 38.42 | a | 40.28 | 47.48 | a | 52.80 | 64.02 | 68.23 | 70.78 | b | 69.05 | a | 64.92 | 53.84 | 45.25 | 41.11 | 54.68 | |||||||||
1985 | 38.13 | a | 40.00 | 48.65 | 54.00 | 59.86 | b | 69.47 | a | 72.10 | 69.75 | a | 62.48 | a | 54.76 | 46.43 | 39.16 | 54.57 | ||||||||
1986 | 41.18 | 44.15 | a | 48.52 | 56.32 | 60.53 | 68.30 | 68.52 | 69.92 | 62.78 | 53.69 | 44.68 | 37.66 | 54.69 | ||||||||||||
1987 | 36.77 | a | 39.38 | 43.89 | 52.10 | a | 57.68 | a | 66.63 | 70.31 | 67.50 | 62.00 | a | 58.23 | 43.76 | a | 36.39 | 52.89 | ||||||||
1988 | 37.58 | 42.64 | 45.76 | b | 52.38 | 60.10 | 68.62 | 70.34 | 68.40 | a | 61.33 | 56.61 | 45.05 | a | 34.87 | a | 53.64 | |||||||||
1989 | 35.56 | 42.74 | a | 49.11 | 55.72 | 60.92 | 67.22 | 71.21 | 66.98 | 63.38 | 53.42 | a | 44.02 | 35.12 | a | 53.78 | ||||||||||
1990 | 35.77 | a | 37.91 | a | 46.33 | a | 54.53 | a | 59.35 | 72.50 | 69.68 | a | 65.47 | 63.37 | 52.94 | 44.66 | a | 36.39 | 53.24 | |||||||
1991 | 36.45 | 41.55 | 42.63 | a | 51.32 | 58.15 | a | 63.67 | a | 68.02 | a | 67.48 | 61.45 | 54.42 | a | 41.91 | b | 36.60 | 51.97 | |||||||
1992 | 33.11 | 40.53 | 45.03 | 52.97 | 57.56 | 65.00 | a | 69.05 | 67.10 | b | 63.41 | a | 56.02 | 39.83 | 37.50 | a | 52.26 | |||||||||
1993 | 40.03 | a | 40.07 | a | 45.73 | 51.85 | 59.34 | 66.73 | 69.87 | a | 68.34 | b | 62.02 | 53.34 | 43.10 | 37.89 | 53.19 | |||||||||
1994 | 37.29 | 40.07 | 46.74 | 52.00 | c | 61.59 | b | 73.23 | 73.37 | a | 72.47 | 64.95 | 55.03 | a | 46.26 | a | 39.98 | 55.25 | ||||||||
1995 | 39.34 | 45.30 | a | 47.87 | 51.25 | b | 59.27 | 66.40 | a | 70.82 | a | 72.05 | a | 65.13 | 56.50 | b | 48.46 | b | 40.85 | a | 55.27 | |||||
1996 | 41.12 | a | 47.05 | a | 47.50 | 54.73 | 64.35 | 70.83 | 70.80 | d | 68.21 | c | 62.11 | b | 55.31 | 46.54 | b | 39.71 | 55.69 | |||||||
1997 | 38.62 | a | 41.50 | a | 48.42 | 51.95 | 62.68 | 66.98 | a | 71.40 | 69.92 | 66.95 | i | 53.39 | d | 44.48 | e | 35.18 | q | 54.93 | b | |||||
1998 | 40.02 | a | 39.04 | a | 44.47 | b | 49.29 | a | 59.63 | 67.22 | a | 71.10 | 69.58 | 67.14 | a | 57.05 | 46.91 | a | 39.73 | 54.26 | ||||||
1999 | 41.35 | 43.57 | 47.98 | b | 51.97 | a | 60.81 | 66.95 | 69.54 | c | 68.52 | 65.03 | 55.15 | a | 48.50 | 37.98 | 54.78 | |||||||||
2000 | 42.19 | 45.57 | a | 46.80 | a | 56.13 | 65.05 | 69.43 | a | 71.03 | b | 69.47 | ----- | z | 54.28 | a | 40.28 | a | 39.50 | 54.52 | a | |||||
2001 | 36.70 | c | 41.57 | 46.27 | 54.47 | 62.56 | 68.48 | g | 69.86 | m | 69.08 | 65.25 | 57.32 | c | 47.39 | b | 36.60 | 51.72 | b | |||||||
2002 | 39.00 | 40.93 | a | 47.78 | a | 57.07 | a | 60.94 | 71.45 | 72.42 | 69.93 | a | 65.41 | a | 53.85 | 45.90 | 37.18 | 55.16 | ||||||||
2003 | 41.74 | 42.91 | 45.31 | 52.37 | 62.40 | a | 68.00 | 74.18 | 71.11 | 66.40 | a | 59.16 | c | 46.48 | a | 38.14 | b | 55.68 | ||||||||
2004 | 39.40 | b | 38.91 | 50.64 | b | 51.57 | 60.25 | g | 67.89 | k | 70.63 | e | 67.45 | a | 61.91 | b | 54.67 | e | 41.95 | a | 37.67 | e | 51.48 | b | ||
2005 | 40.82 | a | 42.45 | 45.53 | b | 52.76 | c | 61.92 | a | 67.96 | c | 73.29 | b | 69.27 | a | 66.26 | a | 54.85 | a | 46.62 | b | 38.48 | g | 56.52 | a | |
2006 | 40.77 | 45.42 | b | 47.31 | 57.05 | 64.37 | d | 72.02 | a | 73.18 | a | 67.73 | 61.60 | i | 54.97 | a | 48.00 | o | 36.66 | f | 58.09 | c | ||||
2007 | 35.04 | c | 42.19 | b | 46.93 | b | 53.97 | k | 62.12 | c | 69.65 | 72.35 | 70.40 | 65.50 | 57.83 | a | 49.86 | a | 38.50 | a | 55.49 | a | ||||
2008 | ----- | z | 43.97 | 47.10 | 52.98 | a | 59.81 | 70.05 | 70.18 | 68.81 | 62.65 | c | 56.20 | a | 47.16 | h | 41.80 | c | 57.35 | b | ||||||
2009 | 41.18 | 45.60 | b | 48.45 | b | 52.00 | b | 62.90 | b | 67.00 | f | 73.28 | o | 70.87 | a | 64.25 | f | 56.82 | 51.30 | h | 39.82 | i | 53.97 | e | ||
2010 | 38.18 | c | 42.29 | 46.43 | a | 53.93 | 59.80 | a | 69.28 | 71.79 | 70.22 | b | 65.90 | 58.28 | a | 45.60 | 43.50 | f | 56.52 | a | ||||||
2011 | 39.24 | 40.89 | 51.12 | a | 58.08 | 60.52 | d | 70.95 | 73.00 | 72.03 | b | 66.86 | a | 58.60 | a | 48.05 | 39.42 | a | 56.56 | |||||||
2012 | 42.18 | 43.91 | 47.56 | 56.90 | a | 63.75 | a | 72.73 | b | 72.17 | a | 72.24 | 65.43 | b | ----- | z | 49.69 | i | 42.05 | 57.89 | b | |||||
2013 | 36.29 | 39.09 | 50.47 | a | 54.88 | a | 61.29 | 72.45 | 71.63 | a | 70.13 | d | 65.72 | 56.97 | 48.50 | 40.78 | a | 55.68 | ||||||||
2014 | 42.55 | b | 49.14 | 49.58 | 54.20 | 60.00 | 72.13 | 72.45 | a | 68.87 | 67.63 | 59.52 | 47.69 | a | 44.15 | 57.33 | ||||||||||
2015 | 40.05 | a | 50.11 | 51.32 | 54.47 | 58.82 | 71.57 | c | 71.35 | a | 72.11 | 67.67 | 60.45 | 49.10 | a | 39.98 | b | 57.25 | ||||||||
2016 | 38.47 | b | 47.09 | 51.63 | 54.73 | 60.95 | 72.15 | 74.87 | 68.81 | 65.57 | 61.61 | 50.86 | b | 43.43 | c | 57.51 | ||||||||||
2017 | 41.47 | 46.27 | 54.85 | 57.62 | 62.42 | 72.97 | 72.44 | 69.76 | 66.22 | 62.21 | 56.15 | 44.63 | 58.92 | |||||||||||||
2018 | 42.48 | 46.54 | 50.35 | 59.37 | 63.97 | 72.27 | 73.24 | 72.02 | h | 67.40 | o | 57.27 | p | 45.94 | n | 44.64 | t | 58.32 | e | |||||||
2019 | 41.35 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.94 | d | 51.62 | n | 47.92 | s | 57.94 | k |
2020 | 42.53 | n | 43.89 | o | 50.07 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.07 | k |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.66 | 42.18 | 47.11 | 53.36 | 60.43 | 68.89 | 71.36 | 69.14 | 64.41 | 55.73 | 45.53 | 38.96 | 54.48 | |||||||||||||
S.D. | 2.58 | 3.06 | 2.65 | 2.35 | 1.92 | 2.41 | 1.44 | 1.54 | 1.78 | 2.38 | 2.93 | 2.44 | 1.39 | |||||||||||||
SKEW | -0.47 | 0.34 | 0.26 | -0.00 | 0.52 | 0.08 | -0.04 | 0.23 | 0.17 | 0.49 | 0.53 | 0.40 | 0.89 | |||||||||||||
MAX | 43.67 | 50.11 | 54.85 | 59.37 | 65.05 | 73.23 | 74.87 | 72.47 | 67.90 | 62.21 | 56.15 | 44.63 | 58.92 | |||||||||||||
MIN | 30.58 | 35.38 | 41.58 | 46.87 | 57.00 | 63.67 | 68.02 | 65.47 | 61.33 | 50.56 | 39.83 | 34.82 | 51.97 | |||||||||||||
YRS | 62 | 63 | 64 | 62 | 62 | 60 | 62 | 63 | 59 | 61 | 58 | 58 | 49 |