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 | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.68 | q | ----- | z | 39.56 | n | ----- | z |
1981 | 35.62 | e | 35.16 | c | 39.48 | b | 55.83 | a | 54.33 | d | 70.96 | b | 74.80 | c | 71.53 | 68.97 | a | 52.50 | a | 44.84 | b | 34.76 | 53.23 | |||
1982 | 27.87 | d | 33.35 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.61 | j |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | 52.40 | 61.89 | 69.02 | 75.39 | 73.89 | 62.15 | 51.66 | 30.37 | c | 25.81 | 55.84 | c | ||||||||
1986 | 39.09 | b | 34.83 | a | 46.73 | 52.48 | a | 59.93 | a | 71.78 | 76.67 | h | 73.41 | h | 64.33 | g | 52.64 | c | 40.67 | f | 31.27 | a | 48.59 | d | ||
1987 | 32.89 | d | 38.00 | g | 39.55 | i | 52.90 | d | 62.42 | m | ----- | z | ----- | z | 67.19 | j | 61.93 | 49.87 | a | 39.12 | 29.52 | c | 44.37 | f | ||
1988 | 22.27 | 31.71 | a | 38.35 | 46.26 | c | 60.67 | b | 72.59 | a | 74.60 | 74.55 | 62.36 | e | 51.31 | 39.40 | a | 30.82 | 50.41 | |||||||
1989 | 31.19 | 23.14 | 40.47 | 51.12 | d | 58.76 | 64.70 | 74.24 | 70.27 | c | 59.29 | a | 51.73 | 41.15 | 26.85 | a | 49.41 | |||||||||
1990 | 30.15 | 28.79 | 39.50 | a | 48.45 | 55.68 | 71.68 | 71.93 | b | 71.35 | 67.52 | 52.75 | a | 41.72 | 24.70 | a | 50.35 | |||||||||
1991 | 24.97 | 38.61 | a | 40.66 | 48.78 | 60.32 | a | 71.31 | a | 73.60 | a | 70.27 | 62.25 | 51.08 | 33.43 | 30.79 | 50.51 | |||||||||
1992 | 27.34 | c | 38.54 | a | 43.68 | 52.37 | 60.16 | 64.88 | 69.61 | 67.00 | b | 64.24 | a | 53.28 | a | 32.40 | 21.21 | 49.56 | ||||||||
1993 | 22.34 | 23.77 | 38.85 | 46.22 | 57.17 | a | 65.68 | 70.50 | 68.97 | 58.68 | 49.29 | 32.27 | 31.73 | 47.12 | ||||||||||||
1994 | 30.10 | 24.46 | 42.50 | 48.03 | 62.21 | 72.43 | 70.78 | b | 74.18 | 67.66 | h | 52.03 | a | 34.83 | c | 34.62 | a | 49.65 | a | |||||||
1995 | 30.25 | a | 38.46 | e | 42.50 | a | 47.12 | 54.52 | a | 66.27 | b | 75.08 | a | 75.70 | f | 65.32 | 52.42 | 42.50 | 32.56 | 49.73 | a | |||||
1996 | 25.45 | 30.10 | d | 35.94 | 50.40 | 59.13 | 70.87 | 73.06 | 70.90 | g | 61.73 | b | 51.65 | 35.52 | 30.79 | 47.69 | a | |||||||||
1997 | 26.82 | a | 30.24 | c | 41.85 | 42.62 | 57.02 | 69.30 | 74.76 | b | 71.70 | i | 64.87 | 49.61 | 36.40 | 29.03 | 47.50 | a | ||||||||
1998 | 30.33 | d | 36.34 | 36.76 | 45.50 | 61.82 | 64.59 | c | 73.74 | 70.84 | 68.52 | 52.31 | 41.62 | 29.52 | 50.99 | |||||||||||
1999 | 32.81 | 37.66 | 41.56 | 45.22 | 57.85 | 67.40 | 75.21 | 71.31 | g | 60.15 | 52.19 | 45.32 | 34.48 | 49.99 | a | |||||||||||
2000 | 30.71 | 38.34 | g | 42.60 | 50.78 | 61.40 | 68.35 | 75.29 | 75.26 | 65.98 | a | 52.60 | 30.87 | 26.15 | 52.73 | a | ||||||||||
2001 | 28.80 | d | 28.02 | 37.71 | j | 50.66 | b | 59.70 | a | 70.18 | 76.24 | 74.42 | 64.88 | 52.13 | 42.05 | 32.55 | 52.69 | a | ||||||||
2002 | 30.26 | 32.54 | 33.35 | 51.07 | 58.62 | a | 74.10 | f | 76.15 | a | 72.81 | 64.23 | 46.69 | 38.83 | 34.08 | 48.97 | a | |||||||||
2003 | 33.03 | b | 28.96 | 41.71 | 52.97 | 58.48 | 65.47 | 76.90 | 74.48 | 61.55 | a | 56.44 | 36.30 | 32.63 | 51.58 | |||||||||||
2004 | 31.03 | 30.31 | 44.42 | 49.25 | 61.45 | a | 66.07 | 70.68 | 66.67 | g | 66.88 | 53.42 | 38.00 | 32.39 | 49.45 | a | ||||||||||
2005 | 29.93 | b | 34.93 | e | 40.69 | d | 49.33 | 59.23 | 69.92 | 75.24 | 71.60 | 67.28 | 52.81 | 43.48 | 29.95 | 52.03 | ||||||||||
2006 | 36.55 | a | 32.35 | e | 39.29 | 53.10 | 61.85 | 71.77 | 75.94 | 73.60 | 58.65 | 50.75 | a | 41.08 | 29.31 | 52.02 | ||||||||||
2007 | 17.79 | 25.32 | 46.33 | g | 46.18 | 61.41 | d | 68.78 | 75.23 | 76.21 | 66.75 | 53.53 | a | 39.48 | 23.69 | 50.40 | a | |||||||||
2008 | 22.79 | 30.57 | 38.95 | b | 44.92 | l | 57.23 | p | 66.92 | k | 80.45 | j | 70.61 | i | 62.38 | 51.41 | d | 41.52 | 26.00 | d | 39.09 | e | ||||
2009 | 30.73 | e | 36.09 | 39.63 | 45.53 | 57.32 | 65.71 | b | 71.55 | 72.02 | c | 63.25 | 41.40 | a | 42.00 | 23.74 | 49.08 | |||||||||
2010 | 29.71 | c | 27.75 | 39.95 | 50.31 | c | 56.37 | a | 70.28 | 74.68 | a | 74.03 | 66.53 | 54.08 | 38.40 | 32.53 | 51.22 | |||||||||
2011 | 26.85 | 26.39 | 41.00 | 48.35 | 54.48 | 68.97 | 77.58 | a | 76.11 | 63.35 | 52.13 | a | 38.78 | 29.13 | 50.26 | |||||||||||
2012 | 32.71 | 29.33 | 47.28 | h | 54.65 | 63.34 | b | 75.86 | a | 79.61 | 73.98 | 66.29 | a | 48.57 | a | 43.12 | 30.02 | 54.32 | a | |||||||
2013 | 29.94 | 30.46 | 35.90 | 41.98 | 58.17 | a | 71.53 | a | 73.52 | a | 73.69 | b | 67.43 | 48.85 | 38.86 | a | 27.21 | 49.80 | ||||||||
2014 | 30.88 | k | 33.75 | v | 39.85 | a | 48.15 | c | 57.92 | 67.80 | 73.32 | 72.58 | 64.43 | a | 54.88 | c | 36.22 | 29.87 | 54.50 | b | ||||||
2015 | 31.13 | 27.43 | n | 43.74 | 50.42 | 54.76 | 72.95 | j | 74.55 | a | 73.94 | 70.72 | e | 56.40 | 40.37 | 32.00 | a | 52.80 | b | |||||||
2016 | 32.41 | b | 37.11 | b | 44.80 | a | 49.03 | 56.43 | b | 73.57 | 75.28 | d | 72.45 | b | 65.95 | 57.86 | b | 46.61 | g | 27.38 | e | 53.84 | a | |||
2017 | 26.07 | b | 39.07 | a | 46.02 | b | 50.93 | a | 57.08 | 71.21 | f | 76.20 | d | 69.45 | b | 64.63 | 51.72 | m | 43.15 | 30.45 | c | 50.31 | b | |||
2018 | 31.19 | 28.77 | 42.73 | a | 45.12 | 62.18 | a | 72.38 | 74.53 | a | 71.02 | e | 66.75 | 46.95 | a | 37.45 | a | 31.63 | 50.89 | |||||||
2019 | 30.62 | a | 25.11 | 38.89 | d | 49.80 | 53.29 | 67.30 | 76.24 | b | 74.93 | c | 69.79 | a | 44.66 | b | 37.08 | d | 33.90 | a | 50.13 | |||||
2020 | 33.34 | c | 29.47 | 43.54 | c | 46.02 | a | 59.17 | d | 74.43 | b | 76.35 | d | 76.08 | a | 63.64 | a | 47.47 | 43.70 | b | 31.50 | a | 52.06 | |||
2021 | 31.06 | 23.41 | a | 40.03 | a | 45.47 | a | 58.39 | d | 70.87 | 74.75 | c | 75.11 | c | 69.54 | e | 54.31 | b | 43.90 | a | 34.73 | c | 51.80 | |||
2022 | 27.98 | 27.89 | a | 36.80 | a | 46.00 | b | 59.23 | 71.45 | a | 78.73 | 73.68 | 69.39 | k | ----- | z | ----- | z | ----- | z | 52.72 | d | ||||
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.58 | 31.11 | 40.67 | 48.97 | 58.70 | 69.53 | 74.61 | 72.91 | 64.69 | 51.45 | 39.04 | 29.98 | 50.66 | |||||||||||||
S.D. | 4.11 | 4.80 | 2.98 | 3.24 | 2.58 | 2.97 | 2.20 | 2.25 | 3.12 | 3.21 | 3.99 | 3.39 | 1.38 | |||||||||||||
SKEW | -0.53 | 0.10 | -0.18 | -0.07 | -0.26 | -0.05 | -0.29 | -0.65 | -0.12 | -0.87 | -0.51 | -0.65 | -0.54 | |||||||||||||
MAX | 39.09 | 39.07 | 46.73 | 55.83 | 63.34 | 75.86 | 79.61 | 76.21 | 70.72 | 57.86 | 45.32 | 34.76 | 53.23 | |||||||||||||
MIN | 17.79 | 23.14 | 33.35 | 41.98 | 53.29 | 64.59 | 69.61 | 67.00 | 58.65 | 41.40 | 30.37 | 21.21 | 47.12 | |||||||||||||
YRS | 38 | 35 | 34 | 38 | 37 | 34 | 36 | 31 | 36 | 37 | 36 | 38 | 19 |