YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
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 | 25.70 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.55 | t | 49.48 | 34.52 | 28.02 | 37.34 | i | |||
1966 | 14.44 | 20.25 | 31.55 | 36.75 | 48.42 | 63.23 | 70.66 | 64.00 | 58.58 | 46.32 | 32.40 | 23.42 | 42.50 | |||||||||||||
1967 | 20.37 | 13.25 | 27.06 | 41.20 | 46.06 | 59.83 | 64.66 | 63.82 | 58.77 | 46.06 | 31.65 | 25.08 | 41.49 | |||||||||||||
1968 | 16.77 | 15.34 | 33.73 | 42.92 | 48.32 | 57.72 | 65.87 | 64.34 | 59.25 | 51.58 | a | 33.88 | a | 23.23 | 42.75 | |||||||||||
1969 | 20.10 | 20.34 | 23.08 | 40.32 | 52.03 | 55.32 | 64.63 | 69.87 | 58.92 | 44.94 | 34.75 | 24.92 | 42.43 | |||||||||||||
1970 | 13.53 | 16.71 | 24.35 | 40.33 | 47.66 | 61.13 | 68.55 | 67.58 | 58.67 | 51.34 | 35.13 | 23.65 | 42.39 | |||||||||||||
1971 | 14.47 | 17.73 | 25.27 | 40.62 | 48.19 | b | 62.12 | 63.48 | d | 63.79 | e | 61.29 | d | 54.16 | 35.38 | 25.16 | c | 42.64 | ||||||||
1972 | 14.28 | a | 13.81 | 21.23 | 32.67 | 52.10 | 58.67 | 63.47 | 62.37 | h | 54.72 | c | 43.81 | d | 32.41 | h | 15.74 | n | 39.42 | c | ||||||
1973 | 21.93 | a | 22.03 | m | 34.63 | 40.12 | 46.50 | c | 60.81 | d | 68.50 | n | 68.92 | l | 60.84 | k | 52.81 | j | 36.14 | l | 24.45 | t | 40.80 | g | ||
1974 | 14.83 | s | 16.40 | r | 26.66 | c | 33.61 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.82 | k | 29.46 | c | 28.06 | j |
1975 | 22.03 | b | 22.27 | 25.52 | a | 33.42 | 53.25 | e | 60.70 | b | 66.90 | g | 66.50 | 55.03 | a | 50.20 | i | 39.37 | 23.02 | 40.11 | b | |||||
1976 | 15.89 | 26.73 | a | 28.84 | 44.05 | 49.50 | 64.83 | 67.31 | 68.63 | 58.35 | 43.11 | 29.62 | 15.61 | 42.71 | ||||||||||||
1977 | 8.55 | 19.98 | 34.19 | 42.15 | 57.67 | a | 59.42 | 66.95 | 61.19 | 56.20 | 48.42 | 34.85 | 22.39 | 42.66 | ||||||||||||
1978 | 17.30 | c | 17.80 | 27.10 | 36.73 | 52.95 | 61.17 | 66.34 | 67.63 | 58.52 | 47.17 | a | 33.87 | 18.08 | 42.05 | |||||||||||
1979 | 10.47 | 9.68 | 26.55 | a | 35.98 | 46.84 | 58.81 | a | 64.85 | 62.47 | 57.88 | 42.87 | 32.80 | 27.56 | 39.73 | |||||||||||
1980 | 17.94 | m | 16.59 | 24.27 | 40.37 | 54.53 | a | 58.20 | 66.93 | a | 65.65 | 55.43 | b | 41.69 | 33.87 | 18.90 | 43.31 | a | ||||||||
1981 | 17.97 | 21.36 | 28.11 | d | 41.93 | h | 48.79 | 61.23 | 65.90 | 64.52 | b | 53.40 | a | 42.87 | a | 38.17 | d | 23.61 | 42.36 | a | ||||||
1982 | 10.67 | d | 15.21 | 26.66 | 35.14 | e | 54.74 | 55.52 | 65.88 | a | 60.94 | 55.93 | a | 46.98 | 28.10 | t | 26.10 | b | 41.25 | a | ||||||
1983 | 21.32 | a | 25.28 | a | 28.88 | a | 35.83 | 45.15 | 62.53 | a | 70.84 | 68.65 | 59.35 | 46.29 | 38.30 | t | 13.08 | 43.38 | a | |||||||
1984 | 14.43 | a | 27.86 | 21.76 | 45.18 | p | 50.63 | 63.48 | 66.34 | 66.88 | a | 54.48 | 47.95 | 34.50 | h | 21.73 | 43.55 | b | ||||||||
1985 | 14.79 | 13.98 | 31.33 | a | 50.23 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.32 | q | 31.85 | c | 15.90 | e | 21.57 | g | ||
1986 | 20.05 | b | 18.00 | d | 30.53 | a | 45.27 | 57.13 | 61.82 | b | 67.95 | 63.90 | a | 56.15 | d | 45.98 | 29.37 | g | 26.21 | 44.82 | a | |||||
1987 | 23.89 | 26.78 | e | 33.24 | 46.05 | a | 56.35 | d | 64.46 | b | 69.10 | f | 66.35 | d | 58.24 | c | 43.54 | c | 37.60 | f | 25.72 | m | 46.55 | c | ||
1988 | 16.37 | a | 15.10 | d | 28.06 | 40.31 | a | 54.31 | b | 66.07 | b | 70.80 | a | 65.64 | f | 58.02 | f | 41.48 | f | 34.67 | f | 21.92 | f | 41.57 | e | |
1989 | 24.39 | 14.17 | d | ----- | z | 36.92 | d | 52.14 | b | 58.74 | c | 67.63 | 66.08 | g | 58.77 | d | 49.33 | d | 29.96 | e | 13.82 | a | 40.59 | b | ||
1990 | 26.55 | c | ----- | z | 31.21 | 42.15 | d | 46.40 | a | 60.48 | b | 65.63 | 65.85 | h | 56.29 | b | 44.24 | d | 37.22 | e | 21.33 | b | 43.15 | b | ||
1991 | 15.05 | 23.93 | a | 28.82 | a | 43.03 | 52.98 | a | 62.64 | e | 64.96 | d | 68.69 | g | 54.66 | a | 45.18 | c | 31.36 | e | 24.76 | d | 40.67 | a | ||
1992 | 21.74 | 23.96 | b | 26.93 | b | 38.32 | 55.19 | e | 59.17 | f | 61.50 | l | 61.86 | j | 55.48 | g | 44.13 | e | 30.55 | k | 25.07 | k | 35.05 | f | ||
1993 | 15.67 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.14 | s | 23.43 | c | 23.43 | k |
1994 | 5.13 | l | 7.17 | g | 29.87 | d | 39.69 | f | 51.75 | m | 60.71 | f | 63.38 | g | 63.29 | e | 58.92 | f | 48.00 | g | 39.89 | h | 32.25 | y | 46.58 | j |
1995 | 22.85 | u | 19.29 | d | 27.00 | r | 37.96 | r | 51.54 | e | 65.83 | i | 65.65 | d | 68.63 | d | 55.04 | b | ----- | z | 26.58 | e | 19.13 | d | 43.69 | e |
1996 | 15.35 | d | 15.33 | t | 23.58 | l | 33.30 | b | 45.07 | c | 58.76 | c | ----- | z | ----- | z | 59.83 | g | 46.26 | 29.83 | d | 20.96 | e | 35.65 | e | |
1997 | 16.18 | a | 19.84 | f | 25.55 | l | 33.77 | o | 44.19 | d | 60.86 | i | 62.76 | n | 61.50 | j | 59.09 | s | 47.54 | g | 32.06 | c | 28.26 | f | 30.81 | i |
1998 | 21.02 | 31.75 | j | 26.19 | e | 42.05 | j | 53.68 | a | 59.46 | b | 67.38 | k | 67.02 | i | 61.92 | j | 49.18 | t | 35.76 | m | 25.02 | i | 40.09 | h | |
1999 | 16.44 | g | 24.31 | o | 29.18 | c | 39.62 | j | 55.33 | k | 63.62 | r | 68.21 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.18 | k |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.95 | b | 64.88 | f | 66.42 | g | 59.28 | a | 46.13 | d | 33.11 | c | 27.50 | i | 49.12 | h |
2004 | 12.08 | a | 22.45 | a | 30.70 | c | 38.86 | i | 47.85 | e | 56.88 | d | 61.28 | a | 59.08 | f | 64.13 | k | 47.25 | e | 36.48 | b | 20.60 | f | 39.37 | d |
2005 | 16.34 | b | 24.62 | c | 26.04 | c | 42.41 | c | 48.88 | g | 63.56 | c | 65.69 | o | 67.11 | c | 62.71 | b | 49.19 | j | 36.75 | t | 19.00 | v | 43.25 | e |
2006 | 27.91 | t | 20.75 | l | 30.80 | p | 41.10 | y | 53.71 | g | 61.06 | m | 68.43 | j | 65.65 | 55.48 | b | 42.27 | ----- | z | 31.13 | p | 54.47 | i | ||
2007 | 21.45 | a | 13.85 | b | 34.22 | h | 35.75 | h | 56.84 | l | 60.93 | p | 67.22 | h | 69.83 | y | 58.79 | i | 49.63 | d | 31.35 | q | 24.21 | s | 28.31 | i |
2008 | 17.29 | l | 17.62 | y | 22.97 | l | 42.29 | r | 46.46 | r | 60.12 | 64.70 | a | 64.89 | 59.77 | 46.92 | 34.72 | 17.40 | 49.79 | e | ||||||
2009 | 11.69 | 19.04 | 26.77 | 37.02 | 49.27 | 57.15 | 60.35 | 63.03 | 61.40 | 41.19 | 40.57 | 21.26 | 40.73 | |||||||||||||
2010 | 21.05 | 21.91 | 34.65 | 45.13 | 55.18 | 59.55 | 68.84 | 68.81 | 53.63 | 49.03 | 35.27 | 22.95 | 44.67 | |||||||||||||
2011 | 16.55 | 19.88 | 26.10 | 38.17 | 48.69 | 57.05 | 69.98 | 67.82 | 57.00 | 49.37 | 36.70 | 26.00 | 42.78 | |||||||||||||
2012 | 22.55 | 26.81 | 41.13 | ----- | z | 56.37 | 64.62 | 69.94 | 66.44 | 55.70 | 45.31 | 34.87 | 27.85 | 46.51 | a | |||||||||||
2013 | 19.79 | 18.12 | 24.65 | 33.85 | 45.84 | 57.23 | 64.37 | 66.55 | 57.58 | 46.79 | 31.95 | 15.53 | 40.19 | |||||||||||||
2014 | 8.16 | 9.95 | 17.23 | 34.25 | 49.69 | 58.27 | 64.45 | 61.18 | 57.30 | 44.39 | 27.28 | 24.48 | 38.05 | |||||||||||||
2015 | 14.50 | 6.98 | 26.24 | 38.80 | 53.16 | b | 56.48 | 66.47 | 66.03 | k | 64.07 | 46.10 | 39.35 | 31.63 | 40.34 | a | ||||||||||
2016 | 20.03 | 22.93 | 30.55 | 35.27 | 50.21 | 59.60 | 66.76 | 67.18 | 60.58 | 48.84 | 42.20 | 22.81 | 43.91 | |||||||||||||
2017 | 22.15 | 25.20 | 26.37 | 39.88 | 46.44 | 60.48 | 63.68 | 60.76 | 60.70 | 50.39 | 30.97 | 18.42 | 42.12 | |||||||||||||
2018 | 18.37 | 16.29 | 24.45 | 30.73 | 54.58 | 58.68 | 67.29 | 64.87 | 58.75 | 40.82 | 27.53 | 26.73 | 40.76 | |||||||||||||
2019 | 14.32 | 13.68 | 24.71 | 36.92 | 45.19 | 56.63 | 68.11 | 62.84 | 59.38 | 45.23 | 28.43 | 23.81 | 39.94 | |||||||||||||
2020 | 23.05 | 21.38 | 29.35 | 34.23 | 49.05 | 62.57 | 69.61 | 65.42 | 55.92 | 40.06 | 38.32 | 25.85 | 42.90 | |||||||||||||
2021 | 23.84 | 15.02 | 32.39 | 39.78 | 50.69 | 63.80 | 64.77 | 69.44 | 58.20 | 52.92 | 35.13 | 26.32 | 44.36 | |||||||||||||
2022 | 12.74 | 13.73 | 24.84 | 35.03 | 52.11 | 61.72 | 65.58 | 65.21 | 57.98 | 48.00 | 36.85 | 22.23 | 41.34 | |||||||||||||
2023 | 23.69 | 21.66 | 26.58 | 38.53 | 50.55 | 59.12 | 62.94 | 61.40 | 60.05 | 48.58 | 34.40 | 33.13 | 43.39 | |||||||||||||
2024 | 22.56 | 28.03 | 31.11 | 32.00 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.24 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.76 | 19.02 | 28.06 | 38.56 | 50.60 | 60.19 | 66.27 | 65.33 | 57.84 | 46.43 | 33.93 | 22.98 | 42.02 | |||||||||||||
S.D. | 4.53 | 5.19 | 4.14 | 3.83 | 3.67 | 2.66 | 2.50 | 2.57 | 2.43 | 3.22 | 3.66 | 4.51 | 1.57 | |||||||||||||
SKEW | -0.19 | -0.11 | 0.41 | 0.06 | 0.10 | 0.22 | -0.01 | -0.14 | 0.26 | 0.18 | 0.02 | -0.24 | -0.61 | |||||||||||||
MAX | 26.55 | 28.03 | 41.13 | 46.05 | 57.67 | 66.07 | 70.84 | 69.87 | 64.07 | 54.16 | 42.20 | 33.13 | 44.67 | |||||||||||||
MIN | 8.16 | 6.98 | 17.23 | 30.73 | 44.19 | 55.32 | 60.35 | 60.76 | 53.40 | 40.06 | 26.58 | 13.08 | 38.05 | |||||||||||||
YRS | 47 | 44 | 47 | 39 | 45 | 45 | 39 | 37 | 42 | 44 | 39 | 42 | 23 |