YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 49.45 | a | 43.16 | h | 32.81 | b | 41.13 | j |
1977 | 26.03 | a | 38.00 | 33.37 | 48.77 | 47.79 | 62.47 | 64.82 | ----- | z | 49.08 | l | 46.53 | b | 32.55 | b | 30.12 | a | 43.05 | b | ||||||
1978 | 31.68 | 33.93 | 42.87 | a | 43.26 | a | 47.69 | 58.83 | 62.41 | i | 63.31 | 54.74 | a | 49.26 | 30.48 | 21.57 | a | 43.42 | a | |||||||
1979 | 17.35 | a | 30.04 | a | 38.85 | a | 42.38 | 52.63 | 60.31 | a | 62.85 | r | 65.18 | l | 61.11 | k | 48.12 | j | 33.22 | a | 33.78 | d | 38.57 | d | ||
1980 | 24.16 | b | 34.60 | 34.50 | 48.00 | 49.71 | c | 55.00 | a | 65.40 | 61.56 | 59.38 | 49.65 | 37.48 | 35.85 | 46.28 | ||||||||||
1981 | 34.98 | 34.20 | a | 40.98 | 44.41 | a | 49.37 | 55.10 | 64.15 | 70.85 | 56.33 | g | 44.50 | a | 38.83 | c | 29.48 | c | 46.08 | a | ||||||
1982 | 25.96 | d | 24.80 | f | 35.50 | c | 39.59 | a | 49.83 | d | 59.98 | a | 64.15 | a | 66.94 | 57.15 | 45.60 | 32.59 | a | 28.95 | b | 46.02 | a | |||
1983 | 34.65 | 36.66 | 40.37 | 42.83 | 52.84 | b | 57.02 | 62.10 | 69.84 | 54.50 | 49.18 | 36.83 | a | 20.58 | 46.45 | |||||||||||
1984 | 28.55 | 33.34 | 38.42 | 41.05 | 48.65 | 55.80 | 67.65 | a | 67.97 | 55.05 | 42.25 | a | 34.64 | b | 24.42 | a | 44.82 | |||||||||
1985 | 23.77 | a | 25.34 | 34.53 | 47.25 | 53.37 | 59.65 | 72.82 | 61.92 | 51.03 | a | 44.85 | a | 23.38 | 26.16 | b | 43.67 | |||||||||
1986 | 34.25 | a | 33.00 | a | 43.13 | 42.98 | 53.19 | 65.05 | a | 62.32 | 71.21 | 51.58 | 50.02 | a | 34.42 | 30.34 | 47.62 | |||||||||
1987 | 27.13 | 35.37 | a | 38.29 | 51.15 | 54.95 | a | 62.50 | 64.21 | 64.44 | 63.57 | 53.81 | 38.26 | a | 29.47 | 48.59 | ||||||||||
1988 | 27.26 | 35.72 | 37.31 | 47.45 | 50.32 | a | 59.68 | 66.29 | 67.07 | a | 59.15 | 56.05 | 35.00 | 29.40 | a | 47.56 | ||||||||||
1989 | 28.15 | 23.91 | a | 35.97 | a | 47.10 | 49.81 | 60.10 | 67.15 | 62.39 | 59.62 | 46.69 | 38.66 | a | 33.12 | a | 46.05 | |||||||||
1990 | 30.78 | a | 30.85 | b | 39.79 | b | 48.60 | 48.92 | 57.57 | a | 68.60 | 66.98 | 66.38 | 45.31 | 37.31 | a | 20.48 | a | 46.80 | |||||||
1991 | 26.89 | 40.55 | 36.18 | 43.05 | a | 48.16 | 53.55 | 66.69 | 70.61 | 61.48 | b | 48.53 | 30.63 | o | 32.10 | a | 47.98 | a | ||||||||
1992 | 31.90 | 40.27 | a | 45.05 | 47.69 | a | 56.95 | a | 63.93 | b | 63.25 | a | 67.58 | e | 58.86 | a | 51.18 | a | 33.17 | 26.71 | b | 48.88 | ||||
1993 | 23.75 | g | 27.30 | a | 39.75 | a | 42.91 | a | 57.18 | a | 57.12 | a | 56.00 | 62.39 | 59.05 | a | 50.32 | 31.52 | b | 31.38 | c | 46.81 | a | |||
1994 | 35.00 | c | 30.44 | a | 41.38 | a | 46.26 | c | 53.43 | c | 58.61 | c | 69.77 | a | 69.33 | b | 62.90 | a | 46.47 | 29.47 | 28.50 | b | 47.63 | |||
1995 | 29.22 | f | 36.81 | b | 36.89 | d | 42.39 | c | 52.42 | 56.14 | a | 65.06 | d | 62.93 | b | 60.66 | a | 43.74 | 40.19 | c | 30.28 | a | 47.95 | a | ||
1996 | 28.83 | b | 30.47 | 38.69 | 44.47 | a | 47.37 | a | 59.21 | a | 68.89 | d | 67.79 | c | 55.78 | 46.79 | 36.50 | a | 29.74 | 46.21 | ||||||
1997 | 29.24 | b | 31.48 | a | 37.55 | b | 41.18 | e | 54.91 | c | 56.25 | f | 63.33 | b | 67.88 | f | 60.54 | f | 44.45 | a | 38.90 | 29.41 | c | 41.16 | c | |
1998 | 31.19 | e | 34.98 | c | 38.40 | a | 43.55 | b | 51.45 | b | 56.48 | a | 70.87 | a | 69.77 | c | 64.32 | b | 45.81 | b | 36.98 | a | 27.10 | f | 49.44 | a |
1999 | 31.98 | c | 31.33 | m | 37.54 | d | 41.02 | c | 47.19 | d | 54.41 | a | 63.67 | b | 68.72 | b | 57.86 | a | 49.57 | c | 43.54 | e | 29.77 | e | 47.75 | a |
2000 | 29.57 | d | 35.27 | c | 39.33 | k | 47.92 | d | 50.50 | a | 58.80 | 66.66 | 67.38 | b | 55.14 | b | 46.91 | b | 30.18 | b | 28.30 | d | 46.97 | a | ||
2001 | 28.87 | a | 30.38 | 39.03 | a | 41.66 | a | 54.22 | b | 57.12 | i | 66.05 | c | 70.55 | 63.54 | b | 47.82 | c | 40.35 | 27.89 | c | 46.40 | a | |||
2002 | 29.07 | c | 30.56 | b | 33.24 | b | 44.09 | a | 50.20 | c | 60.52 | c | 70.38 | a | 64.58 | 60.42 | d | 44.79 | 39.28 | 32.90 | b | 46.67 | ||||
2003 | 35.76 | 30.44 | b | 39.35 | a | 42.85 | d | 51.05 | c | 61.05 | b | 72.38 | c | 70.60 | b | 62.30 | c | 53.28 | b | 31.47 | 31.47 | b | 48.50 | |||
2004 | 30.57 | a | 32.98 | a | 43.05 | c | 47.34 | b | 50.63 | e | 59.55 | a | 69.10 | b | 66.96 | c | 56.03 | a | 48.00 | a | 36.52 | a | 34.48 | a | 47.94 | |
2005 | 32.65 | 35.50 | a | 40.97 | b | 44.30 | e | 52.87 | d | 55.40 | d | 69.32 | c | 68.88 | c | 57.86 | b | 49.03 | b | 35.15 | 29.68 | c | 47.63 | |||
2006 | 34.58 | 30.71 | b | 36.40 | 44.76 | e | 54.77 | 60.67 | c | 72.60 | b | 67.21 | b | 60.36 | b | 46.55 | a | 36.03 | 31.00 | b | 47.97 | |||||
2007 | 25.71 | 34.89 | 42.40 | a | 44.64 | e | 53.43 | b | 59.14 | a | 74.23 | 67.56 | 58.45 | a | 47.18 | a | 36.29 | b | 28.30 | a | 47.68 | |||||
2008 | 26.18 | a | 33.57 | 34.56 | 39.38 | 51.69 | 57.53 | a | 68.37 | 67.60 | 59.57 | 48.85 | 41.03 | 25.50 | 46.15 | |||||||||||
2009 | 29.85 | a | 34.27 | 33.48 | 43.55 | ----- | z | 59.36 | a | 69.39 | 67.60 | a | 64.18 | b | 43.45 | 37.55 | 24.48 | 46.11 | a | |||||||
2010 | 34.45 | a | 35.70 | 40.79 | b | ----- | z | 49.12 | e | 55.87 | d | 66.05 | c | 66.02 | a | ----- | z | ----- | z | ----- | z | 31.74 | 47.47 | d | ||
2011 | 30.52 | d | 28.44 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.48 | j |
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | 28.23 | a | 33.23 | 39.87 | 43.77 | 53.08 | 59.67 | 72.90 | a | 70.05 | 61.00 | 45.90 | a | 37.03 | ----- | z | 49.52 | a | ||||||||
2014 | 33.13 | 28.57 | 39.60 | 44.83 | 53.84 | 57.60 | ----- | z | 69.47 | a | 61.63 | 51.87 | l | 34.88 | 33.19 | 45.67 | b | |||||||||
2015 | 34.21 | 39.39 | 45.87 | 45.55 | 55.29 | 67.93 | 70.39 | 70.97 | 59.07 | 55.05 | 34.25 | 29.61 | 50.63 | |||||||||||||
2016 | 31.69 | 38.91 | 39.58 | 51.48 | 54.08 | 60.93 | 65.23 | 68.05 | 57.75 | 48.35 | 43.65 | 23.27 | 48.58 | |||||||||||||
2017 | 24.06 | 32.62 | 40.18 | ----- | z | 53.66 | 61.31 | a | 73.21 | 72.45 | 60.80 | 46.19 | 38.38 | 28.45 | 48.30 | a | ||||||||||
2018 | 35.40 | 29.96 | 38.08 | 44.78 | 56.53 | 58.38 | 69.84 | 68.85 | 58.20 | 47.69 | 37.30 | 29.60 | 47.89 | |||||||||||||
2019 | 32.71 | 24.98 | 34.71 | 44.92 | 54.13 | 59.70 | 66.34 | 70.00 | 58.18 | 41.73 | a | 37.95 | 32.98 | 46.53 | ||||||||||||
2020 | 33.19 | 32.47 | 38.19 | 45.78 | 52.30 | a | 58.17 | 66.77 | a | 69.26 | 63.45 | 48.66 | 36.75 | 32.65 | 48.14 | |||||||||||
2021 | 32.85 | 28.15 | a | 38.77 | 46.62 | ----- | z | 66.75 | 75.74 | ----- | z | 61.62 | 48.90 | 40.52 | 29.43 | a | 46.94 | b | ||||||||
2022 | 31.50 | 31.36 | 40.44 | 39.38 | 47.48 | 58.38 | 70.65 | 73.37 | a | 64.10 | 52.97 | 29.55 | 27.31 | 47.21 | ||||||||||||
2023 | 29.89 | 30.73 | 33.27 | 42.69 | a | 57.74 | b | 60.43 | a | 70.95 | 69.88 | a | 59.27 | 50.08 | 38.70 | 35.84 | 48.29 | |||||||||
2024 | 30.68 | 35.86 | 38.95 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.16 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.11 | 32.80 | 38.58 | 44.60 | 51.97 | 59.20 | 67.71 | 67.83 | 59.40 | 47.94 | 35.97 | 29.37 | 47.32 | |||||||||||||
S.D. | 3.82 | 3.89 | 3.08 | 2.89 | 2.88 | 3.07 | 3.92 | 2.93 | 3.46 | 3.21 | 3.97 | 3.67 | 1.39 | |||||||||||||
SKEW | -0.85 | -0.14 | 0.12 | 0.32 | 0.06 | 0.71 | -0.32 | -0.58 | -0.35 | 0.48 | -0.68 | -0.65 | -0.37 | |||||||||||||
MAX | 35.76 | 40.55 | 45.87 | 51.48 | 57.74 | 67.93 | 75.74 | 73.37 | 66.38 | 56.05 | 43.65 | 35.85 | 50.63 | |||||||||||||
MIN | 17.35 | 23.91 | 33.24 | 39.38 | 47.19 | 53.55 | 56.00 | 61.56 | 51.03 | 41.73 | 23.38 | 20.48 | 43.67 | |||||||||||||
YRS | 45 | 45 | 45 | 43 | 43 | 43 | 42 | 41 | 40 | 43 | 43 | 44 | 26 |