YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 51.11 | 42.73 | d | 38.23 | 44.02 | i | ||
1981 | 33.56 | 33.61 | 39.11 | 55.02 | 55.42 | 70.42 | 73.87 | 68.98 | 64.05 | 50.60 | 42.82 | 31.50 | 51.58 | |||||||||||||
1982 | 27.58 | f | 29.74 | c | 39.22 | a | 47.90 | 55.21 | 61.80 | 72.34 | 72.16 | 63.03 | 49.40 | 35.85 | 30.67 | a | 50.67 | a | ||||||||
1983 | 31.32 | a | 32.85 | e | 36.16 | 42.22 | 53.36 | b | 64.07 | a | 74.79 | 76.08 | a | 65.43 | 52.84 | 38.85 | 18.00 | a | 48.83 | |||||||
1984 | 23.97 | a | 33.54 | d | 36.00 | 42.55 | 58.00 | a | 67.48 | 73.90 | 73.08 | 61.78 | 53.83 | y | ----- | z | ----- | z | 52.26 | c | ||||||
1985 | ----- | z | ----- | z | ----- | z | 53.57 | i | 59.50 | a | 67.48 | a | 73.48 | b | 72.12 | a | 61.00 | a | 48.94 | 31.45 | a | 26.68 | i | 59.14 | e | |
1986 | 38.68 | 35.88 | 46.60 | 53.33 | d | 57.85 | a | 69.00 | a | 74.05 | 71.35 | k | 62.55 | j | 50.03 | b | 37.98 | a | 31.27 | 49.47 | b | |||||
1987 | 30.42 | a | 35.71 | 36.69 | 50.55 | 59.13 | a | 68.38 | b | 72.79 | b | 69.48 | 63.27 | 51.35 | a | 40.90 | 30.10 | 50.73 | ||||||||
1988 | 19.85 | 29.88 | 38.66 | 48.17 | 59.17 | a | 70.67 | c | 73.65 | d | 73.50 | 62.48 | 53.37 | 40.05 | 30.42 | 49.99 | ||||||||||
1989 | 31.79 | 23.27 | 42.94 | 50.64 | a | 59.61 | 63.97 | 73.58 | 70.87 | a | 61.60 | 51.52 | 41.13 | 26.48 | 49.78 | |||||||||||
1990 | 31.22 | a | 30.04 | 38.94 | 49.28 | 54.82 | a | 71.37 | 71.03 | 71.18 | 67.10 | 51.76 | b | 41.95 | a | 24.74 | 50.28 | |||||||||
1991 | 27.88 | e | 39.92 | b | 40.23 | c | 48.38 | 59.71 | b | 69.59 | a | 70.91 | o | 70.39 | 62.28 | a | 51.07 | a | 34.45 | 30.93 | b | 48.62 | a | |||
1992 | 32.22 | a | 38.62 | a | 43.81 | 52.30 | 60.02 | 62.98 | e | 69.98 | g | 68.09 | b | 63.57 | 53.09 | b | 33.78 | 25.31 | 48.52 | a | ||||||
1993 | 22.92 | 28.74 | a | 40.76 | 47.53 | a | 58.05 | b | 66.18 | b | 72.47 | 70.16 | 58.29 | a | 48.92 | 33.05 | 33.17 | a | 48.35 | |||||||
1994 | 34.44 | f | 32.92 | j | 43.73 | 47.73 | b | 60.23 | a | 71.80 | c | 72.44 | m | 74.38 | g | 65.63 | 51.97 | a | 37.73 | 35.67 | a | 51.81 | d | |||
1995 | 32.00 | a | 36.75 | 40.39 | 43.40 | 51.60 | 64.70 | 71.48 | c | 74.07 | a | 63.22 | 50.28 | a | 41.92 | 33.92 | a | 50.31 | ||||||||
1996 | 29.11 | 33.64 | 36.89 | 50.41 | a | 61.21 | 68.55 | b | 71.73 | a | 69.80 | a | 60.97 | 51.52 | a | 37.09 | c | 31.80 | a | 50.23 | ||||||
1997 | 27.15 | a | 31.34 | c | 42.09 | c | 42.02 | b | 55.84 | b | 65.71 | f | 72.65 | d | 69.63 | e | 63.56 | e | 51.29 | e | 36.20 | b | 27.31 | b | 47.19 | a |
1998 | 31.65 | 34.41 | e | 36.58 | f | 46.88 | d | 60.78 | b | 64.20 | j | 74.57 | j | 70.60 | f | 67.67 | a | 51.47 | a | 41.58 | 30.12 | c | 45.57 | d | ||
1999 | 34.43 | b | 39.35 | d | 43.34 | b | 46.65 | d | 54.30 | d | 65.07 | h | 74.30 | k | 71.14 | b | 59.17 | d | 51.17 | b | 46.25 | b | 34.31 | 48.01 | b | |
2000 | 33.15 | d | 39.07 | f | 41.13 | 50.02 | d | 58.72 | f | 67.31 | f | 75.14 | f | 74.65 | e | 64.29 | a | 52.07 | a | 32.23 | b | 28.44 | 47.00 | d | ||
2001 | 30.08 | a | 31.91 | e | 39.69 | 53.75 | f | 58.73 | i | 70.61 | k | 73.47 | l | ----- | z | ----- | z | ----- | z | ----- | z | 33.61 | c | 33.82 | h | |
2002 | 31.33 | a | 32.22 | c | 35.81 | 50.28 | a | 53.73 | 67.66 | h | 75.36 | x | ----- | z | ----- | z | 37.42 | s | 39.68 | b | 33.34 | 39.48 | e | |||
2003 | 35.44 | 29.80 | 41.39 | 51.40 | 57.81 | d | 64.43 | g | 77.60 | 73.76 | h | 60.71 | b | 56.46 | c | 36.08 | e | 32.65 | h | 49.63 | c | |||||
2004 | 30.67 | d | 31.05 | 45.83 | b | 49.37 | d | 61.12 | b | 64.98 | 69.12 | j | 67.31 | 63.07 | c | 52.15 | 37.93 | b | 33.79 | 48.84 | a | |||||
2005 | 33.21 | c | 35.91 | 39.94 | e | 47.37 | c | 55.66 | i | 67.72 | e | 74.60 | a | 71.66 | b | 66.10 | 54.25 | e | 43.43 | g | 30.40 | 52.12 | b | |||
2006 | 35.63 | 31.20 | 39.08 | 49.29 | f | 60.87 | a | 70.67 | 74.83 | a | 71.21 | b | 57.85 | 50.00 | 39.65 | f | 30.02 | 52.13 | b | |||||||
2007 | 23.28 | a | 29.27 | 45.88 | a | 43.96 | b | 57.89 | 66.75 | f | 73.77 | p | 74.53 | b | 64.47 | 53.05 | 41.53 | 25.79 | 45.97 | b | ||||||
2008 | 26.81 | 31.33 | b | 39.52 | a | 45.48 | 57.09 | b | 66.88 | 74.53 | 68.39 | d | ----- | z | 49.56 | e | 42.07 | 28.10 | 48.16 | a | ||||||
2009 | 32.06 | 37.36 | 41.02 | 45.78 | 58.68 | a | 66.10 | 71.15 | 69.90 | a | 61.07 | 41.78 | a | 42.03 | 23.61 | 49.21 | ||||||||||
2010 | 30.95 | 27.86 | 40.55 | b | 48.90 | a | 53.96 | c | 70.43 | 73.44 | 71.72 | a | 66.22 | a | 53.95 | 38.66 | b | 33.19 | 50.82 | |||||||
2011 | 28.10 | 26.18 | c | 41.32 | a | 48.90 | 54.44 | 69.72 | a | 77.19 | b | 76.37 | a | 63.53 | 50.62 | a | 39.00 | 27.42 | 50.23 | |||||||
2012 | 33.40 | 29.44 | b | 46.72 | b | 52.67 | 59.52 | a | 73.64 | i | 77.66 | 72.42 | a | 64.65 | 48.74 | 42.48 | e | 30.93 | a | 50.79 | a | |||||
2013 | 29.48 | 30.55 | 38.96 | s | 43.40 | a | 58.45 | 71.67 | c | 70.86 | x | 73.00 | a | 66.68 | 49.00 | 35.73 | d | 28.62 | c | 48.66 | b | |||||
2014 | ----- | z | ----- | z | ----- | z | ----- | z | 57.92 | g | 67.95 | 72.33 | b | 69.82 | 63.27 | 53.92 | 34.11 | c | 30.03 | 55.92 | e | |||||
2015 | 31.74 | 33.85 | a | 41.81 | 49.42 | 53.25 | a | 68.88 | 72.07 | a | 71.80 | a | 67.38 | a | 54.56 | 38.46 | b | 30.79 | 51.17 | |||||||
2016 | 31.38 | a | 35.95 | 42.45 | b | 47.83 | a | 54.29 | 70.38 | a | 74.47 | 70.10 | 65.63 | 56.10 | 43.77 | b | 25.35 | 51.47 | ||||||||
2017 | 28.69 | 39.57 | 44.97 | 47.83 | 54.68 | 68.47 | 73.05 | b | 67.69 | 62.28 | 49.63 | a | 42.38 | 30.98 | c | 50.85 | ||||||||||
2018 | 32.24 | 28.64 | 42.26 | 45.35 | 62.88 | a | 72.36 | b | 73.27 | a | 68.93 | d | 65.58 | 47.35 | 37.58 | e | 31.53 | a | 50.66 | |||||||
2019 | 30.61 | 27.44 | a | 35.55 | 49.40 | 52.06 | 66.12 | 75.65 | 74.24 | 70.02 | 45.48 | 37.35 | 34.73 | 49.89 | ||||||||||||
2020 | 32.63 | 29.79 | 43.45 | 47.00 | a | 60.06 | 72.35 | 76.00 | 75.44 | 63.05 | 48.18 | 43.82 | 32.53 | a | 52.03 | |||||||||||
2021 | 31.88 | a | 25.06 | a | 40.45 | 46.82 | 56.44 | 69.69 | a | 74.19 | 73.30 | d | 68.47 | a | 53.94 | 44.55 | b | 37.05 | c | 51.82 | ||||||
2022 | 30.50 | 27.65 | a | 38.02 | 49.53 | 58.55 | 68.68 | 76.32 | 72.60 | b | 67.03 | 54.15 | 36.82 | 27.90 | 50.65 | |||||||||||
2023 | 27.81 | 30.32 | 36.19 | 47.55 | 59.67 | a | 65.36 | a | 73.03 | 73.55 | 66.80 | 53.65 | 42.52 | 35.53 | 51.00 | |||||||||||
2024 | 27.21 | 38.36 | 41.95 | 50.28 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.45 | h | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.41 | 32.20 | 40.76 | 48.09 | 57.42 | 68.14 | 73.85 | 71.60 | 63.90 | 51.23 | 39.11 | 30.43 | 50.47 | |||||||||||||
S.D. | 3.64 | 4.14 | 3.04 | 3.02 | 2.88 | 2.77 | 1.77 | 2.36 | 2.76 | 2.77 | 3.64 | 3.94 | 0.94 | |||||||||||||
SKEW | -0.73 | 0.14 | 0.11 | -0.15 | -0.29 | -0.43 | 0.56 | 0.16 | -0.10 | -0.88 | -0.25 | -0.65 | -0.46 | |||||||||||||
MAX | 38.68 | 39.92 | 46.72 | 55.02 | 62.88 | 72.36 | 77.66 | 76.37 | 70.02 | 56.46 | 46.25 | 38.23 | 52.03 | |||||||||||||
MIN | 19.85 | 23.27 | 35.55 | 42.02 | 51.60 | 61.80 | 71.03 | 67.31 | 57.85 | 41.78 | 31.45 | 18.00 | 48.35 | |||||||||||||
YRS | 40 | 40 | 40 | 40 | 39 | 34 | 32 | 37 | 39 | 41 | 40 | 41 | 21 |