YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.94 | 30.94 | k | |
1965 | 33.84 | 31.57 | 36.32 | 45.20 | 48.55 | 53.87 | 63.16 | 62.61 | 56.57 | 43.23 | 39.73 | 33.58 | 45.69 | |||||||||||||
1966 | 25.90 | 27.68 | 35.87 | 43.00 | 52.26 | 58.93 | 63.90 | 62.19 | 56.73 | 44.55 | 37.83 | 28.55 | 44.78 | |||||||||||||
1967 | 26.61 | 33.07 | 39.97 | 41.50 | 47.32 | 57.83 | 64.81 | 61.03 | 57.40 | 43.35 | 35.13 | 28.48 | 44.71 | |||||||||||||
1968 | 29.48 | 35.76 | 37.19 | 39.47 | 46.00 | 56.43 | 61.45 | 57.29 | 52.23 | 40.10 | 32.20 | 21.52 | 42.43 | |||||||||||||
1969 | 30.10 | 28.46 | 27.87 | 39.28 | a | 45.81 | 57.20 | 67.10 | 65.57 | a | 58.17 | 46.65 | 36.00 | 30.21 | b | 44.37 | ||||||||||
1970 | 25.58 | 32.25 | 35.45 | 37.80 | 49.26 | 60.07 | b | 65.47 | a | 63.32 | 57.90 | 41.48 | 33.10 | 29.83 | b | 44.29 | ||||||||||
1971 | 26.00 | 29.67 | a | 34.55 | 40.20 | 48.94 | 57.90 | 67.17 | a | 62.61 | 57.87 | 46.39 | 34.80 | 32.29 | 44.86 | |||||||||||
1972 | 27.81 | 28.75 | a | 40.10 | a | 39.80 | 48.16 | 58.77 | 65.90 | 63.52 | 57.43 | 50.35 | 30.53 | 28.00 | a | 44.93 | ||||||||||
1973 | 27.16 | 31.39 | 34.20 | a | 38.53 | 50.16 | 58.70 | 64.27 | a | 62.16 | 56.73 | 44.06 | 33.63 | 24.81 | 43.82 | |||||||||||
1974 | 31.52 | b | 25.46 | 39.32 | 40.62 | a | 50.26 | 60.96 | e | 63.35 | 60.03 | 55.90 | 46.37 | a | 32.17 | 24.16 | 44.18 | |||||||||
1975 | 24.77 | 28.29 | 32.61 | 36.63 | 45.03 | a | 54.59 | a | 63.63 | a | 63.27 | a | 55.00 | 41.81 | 30.07 | 26.84 | 41.88 | |||||||||
1976 | 25.06 | 33.07 | a | 35.07 | a | 41.50 | 49.53 | a | 55.87 | 61.90 | 61.68 | 56.10 | 41.55 | 33.03 | 25.35 | 43.31 | ||||||||||
1977 | 29.97 | 30.14 | 33.16 | 41.93 | 48.58 | 59.20 | 64.84 | 64.48 | 56.93 | 47.06 | 34.60 | 30.06 | 45.08 | |||||||||||||
1978 | 30.58 | 30.64 | 40.23 | 42.23 | 48.52 | 58.80 | 63.53 | a | 60.73 | a | 56.45 | a | 44.32 | 37.00 | a | 25.77 | 44.90 | |||||||||
1979 | 29.30 | a | 30.36 | 34.48 | 41.33 | 49.19 | 57.70 | 64.48 | 59.52 | 56.70 | 44.58 | 28.10 | 27.07 | a | 43.57 | |||||||||||
1980 | 30.61 | 33.45 | 33.90 | 40.00 | 47.19 | 57.47 | 65.13 | 60.55 | 55.17 | a | 41.19 | 29.79 | b | 29.42 | 43.66 | |||||||||||
1981 | 31.35 | 32.37 | a | 36.71 | 45.37 | 51.26 | 60.73 | 65.94 | 65.03 | 59.47 | 48.87 | a | 35.77 | 30.10 | a | 46.91 | ||||||||||
1982 | 32.79 | c | 35.38 | b | 36.59 | i | 43.43 | i | 50.13 | a | 56.29 | b | 65.11 | c | 65.68 | 60.33 | 43.58 | 39.33 | 31.13 | a | 47.98 | b | ||||
1983 | 29.62 | b | 34.26 | a | 37.39 | 39.37 | 47.32 | 55.73 | 64.68 | 64.13 | 62.19 | c | 49.87 | 37.03 | 33.35 | 46.25 | ||||||||||
1984 | 31.45 | 28.97 | 36.26 | 42.00 | b | 54.32 | 60.52 | a | 65.23 | 63.48 | 58.97 | 47.68 | 35.66 | a | 34.81 | 46.61 | ||||||||||
1985 | 32.35 | 31.04 | a | 39.00 | 43.45 | a | 49.97 | a | 57.86 | a | 64.73 | a | 63.16 | 57.72 | e | 52.93 | c | 37.28 | a | 26.30 | a | 46.32 | ||||
1986 | 27.84 | 34.25 | 39.39 | 46.07 | a | 50.71 | 60.37 | 64.20 | a | 65.40 | a | 54.97 | 45.19 | 37.21 | a | 29.97 | a | 46.30 | ||||||||
1987 | 25.38 | b | 32.18 | 33.00 | a | 44.60 | 49.53 | a | 58.57 | 62.57 | a | 60.30 | a | 55.27 | 50.90 | 34.52 | a | 28.29 | 44.59 | |||||||
1988 | 28.94 | 31.41 | 34.13 | 41.60 | 49.52 | 61.89 | b | 66.10 | 65.37 | a | 55.13 | 49.84 | 33.87 | 26.84 | 45.39 | |||||||||||
1989 | 28.35 | 35.43 | 38.94 | 44.83 | 50.26 | 57.90 | 65.42 | 62.39 | 56.87 | 45.13 | 34.10 | 27.83 | a | 45.62 | ||||||||||||
1990 | 26.32 | 30.79 | 37.97 | 45.00 | a | 51.32 | 64.17 | 65.16 | 61.19 | 59.87 | 43.60 | a | 37.97 | a | 27.75 | c | 45.93 | |||||||||
1991 | 30.77 | 35.96 | b | 35.81 | 40.53 | 47.90 | b | 53.27 | 64.45 | 62.90 | 55.57 | 42.58 | 30.60 | 29.23 | a | 44.13 | ||||||||||
1992 | 26.47 | a | 34.66 | 36.26 | 41.21 | b | 50.71 | 52.07 | 58.79 | b | 58.40 | a | 51.87 | 40.39 | 25.53 | 27.81 | 42.01 | |||||||||
1993 | 32.68 | 31.26 | a | 32.38 | b | 36.77 | 47.16 | 53.76 | a | 58.97 | 64.03 | 56.69 | a | 47.50 | c | 38.67 | 41.41 | n | 45.44 | a | ||||||
1994 | 26.97 | a | 35.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.20 | j | |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.95 | k | 50.37 | a | 43.04 | b | 29.81 | 41.07 | i | |
2002 | 33.00 | 35.41 | a | 38.23 | 50.70 | 53.13 | 65.79 | a | 69.00 | a | 66.75 | c | 62.66 | a | 49.32 | 39.03 | 32.39 | 49.62 | ||||||||
2003 | 33.76 | b | 38.70 | a | 38.86 | b | 46.67 | 54.97 | b | 64.37 | 69.33 | a | 68.25 | c | 63.90 | a | 54.80 | a | 41.24 | a | 32.70 | a | 50.63 | |||
2004 | 36.69 | b | 33.19 | b | 45.67 | a | 47.95 | i | 56.00 | b | 63.04 | b | 66.31 | b | 65.87 | a | 61.12 | d | 51.87 | a | 38.37 | c | 32.59 | d | 50.06 | a |
2005 | 37.24 | b | 40.74 | e | 40.63 | d | 46.58 | d | 55.29 | c | 62.44 | e | 69.97 | a | 66.04 | g | 63.08 | d | 51.89 | d | 38.80 | 33.10 | a | 49.07 | a | |
2006 | 32.08 | f | 37.31 | b | 41.18 | c | 48.00 | d | 56.57 | c | 66.93 | c | 70.32 | c | 65.48 | d | 58.82 | h | 50.08 | e | 41.94 | m | 28.96 | f | 54.48 | d |
2007 | 30.42 | g | 33.88 | b | 40.48 | d | 46.04 | d | 55.44 | f | 64.39 | b | 67.71 | 67.00 | a | 61.58 | d | 48.88 | g | 40.54 | f | 28.06 | 51.14 | d | ||
2008 | 32.23 | a | 32.40 | d | 35.67 | d | 43.97 | 51.53 | a | 63.00 | b | 66.77 | a | 65.21 | b | 60.92 | d | 48.33 | d | 38.62 | d | 34.41 | d | 47.75 | ||
2009 | 32.04 | e | 33.71 | 40.11 | d | 44.34 | a | 57.18 | c | 61.29 | i | 69.32 | c | 66.62 | g | 60.55 | j | 49.46 | e | 34.80 | y | ----- | z | 46.60 | e | |
2010 | 31.83 | g | 34.21 | i | 37.38 | o | 44.95 | h | 51.62 | r | 62.95 | k | 67.92 | f | 66.48 | f | 60.05 | j | 50.72 | m | 33.77 | q | 34.38 | o | ----- | z |
2011 | 29.20 | k | 28.79 | n | 38.85 | k | 48.24 | i | 51.05 | j | 62.74 | k | 68.57 | h | 68.64 | f | 61.48 | g | 49.30 | h | 37.86 | i | 31.86 | q | ----- | z |
2012 | 33.33 | m | 34.96 | d | 38.00 | e | 48.67 | f | 55.64 | f | 63.14 | h | 65.60 | k | 67.00 | a | 58.41 | m | 50.26 | d | 41.91 | h | 30.68 | c | 44.18 | g |
2013 | 28.79 | g | 27.55 | f | 40.25 | k | 45.81 | d | 54.52 | h | 62.65 | d | 65.07 | d | 65.96 | g | 62.46 | b | 45.77 | i | 40.10 | i | 32.00 | j | 59.00 | h |
2014 | 30.57 | h | 37.86 | f | 43.00 | i | 46.86 | i | 53.00 | i | 67.92 | f | 69.27 | i | 66.16 | f | 64.48 | i | 51.52 | j | 40.43 | b | 34.43 | a | 37.43 | j |
2015 | 32.07 | b | 40.44 | a | 44.16 | 46.89 | b | 50.27 | e | 66.29 | b | 69.44 | d | 67.81 | 62.84 | e | 54.33 | d | 36.00 | b | 29.15 | e | 49.98 | |||
2016 | 28.57 | h | 34.71 | e | 41.13 | h | 45.50 | d | 54.15 | e | 65.96 | d | 69.54 | g | 61.42 | e | 57.57 | g | 49.31 | o | 38.95 | i | 35.40 | k | 52.35 | g |
2017 | 33.09 | h | 34.50 | l | 41.63 | l | 45.20 | o | 45.78 | v | 60.92 | q | 66.03 | 63.26 | 59.53 | 50.30 | a | 43.60 | j | 30.17 | h | 59.78 | h | |||
2018 | 32.05 | j | 38.27 | b | 40.22 | d | 48.20 | e | 54.53 | l | 60.42 | k | 65.91 | h | 63.81 | j | 59.62 | i | 49.42 | g | 35.56 | l | 34.22 | m | 42.23 | i |
2019 | 30.65 | k | 33.40 | h | 40.91 | h | 46.76 | i | 47.88 | n | 58.14 | p | 64.96 | f | 65.20 | f | 59.50 | f | 45.85 | e | 39.56 | e | 29.88 | f | 42.70 | j |
2020 | 29.88 | f | 34.65 | c | 41.04 | h | 47.61 | g | 54.71 | c | 61.14 | h | 66.82 | i | 65.41 | n | ----- | z | ----- | z | ----- | z | ----- | z | 44.68 | j |
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.80 | 33.06 | 37.20 | 42.89 | 50.48 | 59.55 | 65.27 | 63.34 | 58.06 | 46.88 | 35.53 | 29.43 | 45.31 | |||||||||||||
S.D. | 3.20 | 3.33 | 3.43 | 3.36 | 3.08 | 3.85 | 2.61 | 2.58 | 2.98 | 3.93 | 3.84 | 3.06 | 2.09 | |||||||||||||
SKEW | 0.29 | 0.18 | -0.05 | 0.11 | 0.51 | 0.15 | -0.21 | -0.17 | 0.19 | 0.09 | -0.49 | -0.22 | 0.85 | |||||||||||||
MAX | 37.24 | 40.74 | 45.67 | 50.70 | 57.18 | 66.93 | 70.32 | 68.25 | 63.90 | 54.80 | 43.04 | 34.81 | 50.63 | |||||||||||||
MIN | 24.77 | 25.46 | 27.87 | 36.63 | 45.03 | 52.07 | 58.79 | 57.29 | 51.87 | 40.10 | 25.53 | 21.52 | 41.88 | |||||||||||||
YRS | 37 | 43 | 39 | 39 | 39 | 39 | 40 | 39 | 38 | 41 | 38 | 39 | 31 |