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 | 33.37 | 36.52 | 43.40 | 56.65 | 53.13 | 44.63 | 34.30 | a | 24.20 | 20.65 | 38.54 | c | ||||||||
1943 | 22.29 | 25.04 | 31.35 | 34.63 | 41.39 | 48.67 | 55.61 | 59.92 | e | 48.40 | 36.32 | 20.97 | 23.87 | 37.37 | ||||||||||||
1944 | 19.10 | 24.52 | 24.58 | 30.17 | 37.19 | 42.27 | 50.10 | 50.84 | 45.43 | 35.83 | a | 28.63 | 22.29 | 34.25 | ||||||||||||
1945 | 18.39 | 27.14 | 25.16 | 29.10 | 38.53 | a | 43.60 | 57.42 | 58.61 | 48.47 | 40.23 | 22.40 | 14.94 | 35.33 | ||||||||||||
1946 | 22.13 | 18.00 | 26.10 | a | 36.27 | 38.87 | 46.50 | 57.55 | 57.68 | 48.60 | 33.68 | 25.77 | 22.55 | 36.14 | ||||||||||||
1947 | 16.45 | 23.04 | 26.71 | 32.10 | 43.03 | 48.80 | 56.35 | 56.39 | 49.57 | 37.23 | 22.80 | 21.77 | 36.19 | |||||||||||||
1948 | 17.39 | 21.83 | ----- | z | 31.77 | 37.23 | 46.17 | 54.03 | 55.81 | 45.07 | 36.81 | 21.13 | 21.48 | 35.34 | a | |||||||||||
1949 | 15.00 | 14.14 | 26.39 | 34.38 | a | 39.65 | 49.80 | 59.84 | 51.58 | 51.60 | 34.58 | 27.57 | 18.39 | 35.24 | ||||||||||||
1950 | 19.42 | 24.25 | 28.58 | 33.90 | 37.06 | 46.10 | 59.10 | 51.90 | 45.00 | 38.94 | 24.70 | 20.58 | 35.79 | |||||||||||||
1951 | 17.32 | 24.29 | 25.19 | 33.50 | 40.58 | 43.97 | 59.16 | 53.61 | 46.33 | 35.16 | 26.27 | 23.00 | 35.70 | |||||||||||||
1952 | 23.65 | 20.79 | 25.13 | 34.67 | 38.90 | 43.73 | 53.06 | 55.29 | 47.50 | ----- | z | 21.83 | 20.74 | 35.03 | a | |||||||||||
1953 | 21.35 | 17.07 | 23.48 | 30.40 | 35.90 | 44.70 | 59.10 | a | 54.45 | 42.83 | 31.61 | 22.10 | a | 13.71 | 33.06 | |||||||||||
1954 | 19.39 | 23.68 | 25.61 | 32.43 | 40.97 | 46.63 | 58.52 | 53.52 | b | 48.33 | 34.86 | b | 26.10 | 17.45 | 35.62 | |||||||||||
1955 | 21.23 | a | 16.32 | 24.42 | 28.67 | 36.29 | 49.47 | 54.52 | 57.48 | 43.80 | 38.48 | 27.70 | 24.39 | 35.23 | ||||||||||||
1956 | 23.13 | a | 17.07 | 22.10 | 31.96 | d | 40.07 | b | 49.38 | d | 56.19 | 51.74 | 47.40 | 35.29 | 20.37 | 16.39 | 34.26 | |||||||||
1957 | 26.94 | 30.82 | 31.32 | 33.20 | 37.13 | 47.43 | 56.55 | 56.87 | 45.12 | d | 39.77 | 26.00 | ----- | z | 39.20 | a | ||||||||||
1958 | 17.84 | 27.36 | 28.03 | 30.73 | 39.35 | 45.67 | l | 54.05 | i | 59.65 | 49.62 | d | 39.43 | a | 25.07 | 19.58 | 33.67 | b | ||||||||
1959 | 18.82 | c | 22.00 | a | 24.29 | 34.73 | 38.89 | c | 49.43 | 59.06 | 56.55 | 44.07 | 34.42 | 23.60 | 22.81 | 35.72 | ||||||||||
1960 | 14.13 | 20.97 | 28.42 | 32.04 | b | 37.42 | 50.87 | 54.67 | a | 56.07 | a | 48.63 | 37.34 | b | 26.67 | 17.97 | 35.43 | |||||||||
1961 | 19.55 | 25.43 | 26.61 | 33.20 | 39.33 | a | 48.30 | 58.32 | 58.32 | ----- | z | 34.84 | 26.88 | f | 20.52 | 36.44 | b | |||||||||
1962 | 21.61 | 27.43 | 24.13 | 37.53 | 37.32 | 45.10 | 56.77 | 57.45 | 51.70 | 38.20 | a | 31.40 | 23.55 | 37.68 | ||||||||||||
1963 | 18.32 | 26.32 | 25.32 | 30.60 | 42.52 | 48.07 | 60.77 | 59.00 | 51.47 | 42.90 | 30.77 | 18.29 | 37.86 | |||||||||||||
1964 | 16.13 | 18.72 | 25.71 | 34.50 | 41.84 | 49.40 | 59.52 | 54.65 | 48.34 | a | 39.84 | 22.87 | 22.52 | 36.17 | ||||||||||||
1965 | 25.81 | 24.57 | 27.39 | 35.31 | a | 37.94 | 48.40 | j | 59.29 | 55.85 | k | 46.97 | 38.10 | 33.43 | 25.74 | 35.45 | b | |||||||||
1966 | 21.77 | 21.64 | 29.39 | 36.10 | 44.58 | 50.73 | 60.03 | 59.27 | a | 52.07 | 37.71 | 30.53 | 22.68 | 38.88 | ||||||||||||
1967 | 21.19 | 23.50 | 29.94 | 30.00 | 40.19 | 46.87 | 60.52 | 57.03 | 51.23 | 38.23 | 31.50 | 14.61 | 37.07 | |||||||||||||
1968 | 14.48 | ----- | z | 29.52 | 31.07 | ----- | z | 49.40 | 57.84 | 53.45 | 47.73 | 39.29 | 30.23 | 18.77 | 37.18 | b | ||||||||||
1969 | 29.90 | 26.39 | 25.23 | 31.83 | 44.16 | 48.17 | 60.16 | 60.26 | 51.50 | 36.39 | 29.63 | 24.93 | b | 39.05 | ||||||||||||
1970 | 21.94 | 26.64 | q | ----- | z | 28.75 | v | 42.16 | 51.40 | 61.07 | a | 60.23 | 45.19 | d | 35.94 | 27.17 | 20.97 | 40.67 | c | |||||||
1971 | 17.77 | 21.61 | 24.55 | 31.00 | 38.81 | 47.90 | 59.71 | 59.19 | 48.93 | 35.45 | 25.00 | 20.61 | 35.88 | |||||||||||||
1972 | 17.52 | 20.72 | 31.48 | 34.73 | 40.06 | 51.97 | 60.71 | 57.10 | 49.97 | 42.71 | 25.70 | 18.65 | 37.61 | |||||||||||||
1973 | 19.26 | 26.36 | 28.16 | 31.55 | a | 42.48 | 50.30 | 56.13 | 55.84 | 45.97 | 36.29 | 27.73 | 23.13 | 36.93 | ||||||||||||
1974 | 23.07 | a | 18.74 | a | 31.26 | 32.60 | 44.10 | 53.03 | 59.26 | 54.58 | 50.59 | a | 41.19 | 28.47 | 20.83 | a | 38.14 | |||||||||
1975 | 20.93 | a | 22.79 | 27.71 | 31.54 | b | 39.90 | 47.57 | 58.87 | 54.10 | 49.90 | 37.68 | 25.17 | 23.74 | 36.66 | |||||||||||
1976 | 20.32 | 29.03 | 27.48 | 33.20 | 45.16 | 48.67 | 59.68 | 54.58 | 51.80 | 37.00 | a | 27.03 | 17.68 | 37.64 | ||||||||||||
1977 | 24.20 | a | 23.29 | 23.81 | 34.72 | e | 39.48 | 51.70 | 60.45 | 60.71 | 52.38 | a | 41.77 | 30.43 | 28.27 | a | 39.27 | |||||||||
1978 | 29.87 | 30.71 | 35.57 | a | 35.77 | 40.39 | 51.77 | 57.77 | 57.48 | 48.53 | 42.77 | 32.37 | 20.06 | 40.26 | ||||||||||||
1979 | 21.35 | 22.79 | 30.43 | a | 33.90 | 42.58 | 48.80 | 56.82 | c | 53.24 | b | 48.32 | h | 37.77 | 23.04 | f | 21.73 | i | 38.63 | c | ||||||
1980 | 28.03 | b | 28.07 | 29.48 | 32.75 | b | 38.03 | a | 48.17 | 58.84 | 58.39 | 49.93 | 37.19 | 26.81 | d | 25.24 | b | 38.41 | ||||||||
1981 | 25.33 | a | 24.55 | f | 29.63 | a | 38.76 | a | 45.45 | 56.53 | 62.19 | 59.10 | 51.63 | 37.54 | e | 28.30 | g | 23.68 | i | 45.13 | c | |||||
1982 | 19.38 | o | 26.87 | m | 29.24 | j | 33.14 | i | 42.44 | f | 47.33 | f | 57.61 | h | 60.25 | g | 51.09 | g | 32.65 | k | 31.47 | m | 22.88 | n | ----- | z |
1983 | 22.10 | k | 29.30 | h | 31.15 | d | 30.96 | b | 38.79 | g | 47.17 | g | 59.25 | k | 58.26 | h | 54.55 | h | 41.80 | k | 30.00 | p | 25.21 | q | 31.06 | j |
1984 | 20.61 | m | 19.68 | j | 26.81 | j | 33.76 | i | 46.48 | h | 51.30 | 61.31 | e | 58.39 | c | 51.33 | i | 34.76 | j | 26.25 | n | 26.25 | o | 57.00 | i | |
1985 | 22.89 | l | 23.29 | k | 30.05 | l | 37.05 | i | 44.85 | d | 52.18 | b | 60.90 | 57.57 | a | 47.79 | f | 40.30 | k | 27.28 | l | 23.05 | j | 53.88 | h | |
1986 | 23.53 | p | 28.69 | l | 32.60 | k | 37.64 | h | 42.57 | j | 53.81 | i | 58.15 | k | 60.53 | l | 47.44 | l | 36.68 | l | 27.76 | m | 22.50 | m | ----- | z |
1987 | 20.00 | n | 25.08 | o | 25.21 | l | 36.14 | h | 43.92 | g | 51.66 | a | 54.38 | e | 58.43 | c | 50.24 | e | 43.26 | h | 30.16 | k | 22.06 | o | 53.68 | h |
1988 | 24.92 | s | 25.22 | k | 26.23 | i | 38.28 | l | 42.30 | k | 55.37 | c | 59.76 | b | 58.48 | d | 45.67 | i | 41.94 | n | 30.73 | o | 18.46 | r | 57.87 | i |
1989 | 22.54 | r | 24.00 | n | 32.18 | i | 39.85 | j | 44.52 | j | 53.09 | h | 61.10 | k | 57.52 | f | 49.70 | j | 40.10 | j | 26.35 | j | 20.00 | n | ----- | z |
1990 | 20.17 | m | 24.12 | k | 28.50 | i | 37.30 | j | 43.00 | h | 52.39 | b | 60.87 | 56.18 | c | 52.17 | l | 37.91 | i | 25.74 | k | 14.06 | m | 56.48 | i | |
1991 | 22.88 | n | 25.31 | l | 26.83 | m | 32.00 | h | 41.73 | i | 48.94 | l | 59.41 | i | 58.67 | s | 51.17 | l | 40.86 | j | 29.47 | k | 24.37 | l | ----- | z |
1992 | 20.86 | j | 28.65 | l | 32.48 | j | 38.86 | h | 45.79 | l | 49.86 | h | 57.89 | m | 59.10 | k | 49.18 | m | 41.00 | m | 26.17 | l | 22.74 | l | ----- | z |
1993 | 29.00 | j | 27.90 | h | 31.91 | h | 35.57 | i | 46.38 | j | 47.94 | l | 54.16 | l | 58.05 | j | 48.84 | k | 42.21 | l | 27.28 | l | 19.65 | k | ----- | z |
1994 | 21.00 | l | 23.29 | k | 32.30 | h | 36.56 | n | 42.83 | m | 53.75 | n | 57.27 | p | 62.11 | l | 52.95 | j | 37.80 | k | 25.40 | j | 24.47 | l | ----- | z |
1995 | 28.30 | k | 31.22 | j | 31.06 | n | 35.65 | m | 42.14 | i | 50.45 | h | 58.05 | k | 62.35 | h | 54.88 | m | 38.25 | k | 32.61 | l | 26.69 | r | ----- | z |
1996 | 20.24 | n | 27.35 | l | 31.90 | j | 36.95 | h | 47.59 | i | 54.79 | k | 62.57 | j | 60.09 | i | 54.29 | p | 36.20 | k | 30.53 | k | 23.85 | k | ----- | z |
1997 | 27.32 | i | 23.16 | i | 27.29 | q | 36.43 | i | 47.30 | k | 52.55 | j | 56.57 | q | 61.53 | p | 56.89 | k | 38.42 | l | 33.18 | m | 21.50 | m | ----- | z |
1998 | 25.41 | n | 28.35 | k | 31.74 | l | 31.67 | i | 40.71 | n | 46.75 | v | 57.71 | x | ----- | z | 53.12 | m | 38.53 | l | 27.35 | m | 22.32 | l | ----- | z |
1999 | 23.39 | m | 25.53 | k | 31.43 | j | 34.55 | h | 43.83 | m | 52.92 | q | 58.43 | q | 56.58 | s | 52.41 | m | 38.76 | n | 29.59 | m | 21.43 | j | ----- | z |
2000 | 22.79 | l | 27.78 | k | 32.05 | k | 40.72 | l | 43.65 | n | 54.95 | i | 60.12 | o | 62.05 | i | 51.47 | k | 42.33 | p | ----- | z | 20.00 | t | ----- | z |
2001 | 23.56 | o | 24.28 | j | 34.09 | i | 36.10 | i | 47.91 | i | 53.71 | m | 59.53 | n | 59.52 | j | 51.71 | m | 41.52 | j | 31.65 | j | 22.74 | l | ----- | z |
2002 | 21.10 | k | 19.47 | k | 25.14 | j | 40.23 | h | 43.55 | i | 54.20 | j | 63.95 | i | 60.77 | i | 54.26 | k | 40.23 | i | 28.61 | l | 23.44 | m | ----- | z |
2003 | 28.65 | k | 27.72 | j | 32.45 | k | 34.90 | i | 46.64 | i | 54.33 | i | 63.86 | i | 62.52 | j | 54.90 | j | 46.62 | j | 30.38 | n | 21.50 | k | ----- | z |
2004 | 23.65 | k | 24.32 | j | 36.96 | h | 40.77 | h | 47.35 | k | 52.80 | j | 59.10 | j | 58.27 | i | 51.00 | i | 41.72 | m | 30.36 | e | 26.04 | d | 28.20 | j |
2005 | 30.88 | e | 32.69 | b | 33.19 | d | 36.48 | a | 46.84 | 52.63 | 61.70 | a | 60.03 | 51.28 | a | 42.17 | b | 28.58 | d | 21.88 | f | 43.32 | a | |||
2006 | 21.00 | j | 23.00 | d | 30.64 | f | 40.00 | c | 52.69 | b | 62.43 | b | 66.70 | a | 61.50 | a | 50.81 | c | 39.74 | d | 30.22 | c | 21.31 | e | 44.84 | b |
2007 | 20.75 | c | 27.92 | b | 33.77 | a | 39.87 | 47.93 | a | 54.57 | 64.13 | 62.16 | 54.75 | b | 39.93 | a | 34.45 | a | 23.23 | e | 41.95 | |||||
2008 | 24.15 | d | 28.41 | b | 32.52 | d | 40.32 | b | 45.07 | d | 55.10 | a | 63.31 | b | 63.29 | 55.05 | h | 41.24 | b | 33.75 | b | 26.23 | a | 41.22 | a | |
2009 | 26.86 | b | 26.54 | 30.96 | c | 37.79 | b | 50.30 | a | 53.52 | a | 64.40 | f | 59.67 | s | ----- | z | 39.45 | 29.71 | b | 22.31 | b | 35.27 | c | ||
2010 | 25.45 | 28.88 | b | 31.38 | b | 35.48 | a | 43.26 | 54.27 | 64.20 | a | 61.26 | ----- | z | ----- | z | ----- | z | ----- | z | 43.02 | d | ||||
2011 | ----- | z | ----- | z | ----- | z | 41.53 | 43.23 | a | 53.24 | a | 63.83 | a | 61.87 | a | 53.75 | b | 38.59 | b | 28.57 | b | 22.55 | 45.24 | c | ||
2012 | 22.00 | 23.46 | a | 28.87 | 38.76 | a | 45.26 | 52.43 | 58.43 | a | 58.53 | a | 51.21 | b | 39.40 | a | 29.90 | 25.03 | b | 39.44 | ||||||
2013 | 19.58 | 23.14 | 33.19 | 35.26 | c | 39.43 | a | 51.87 | 62.65 | 61.52 | 52.67 | 35.94 | 31.67 | 22.71 | 39.13 | |||||||||||
2014 | 23.90 | 28.29 | 34.16 | 37.57 | 46.32 | 53.37 | 62.65 | 58.42 | 55.13 | 42.39 | 29.60 | 29.29 | 41.76 | |||||||||||||
2015 | 25.81 | 30.96 | 34.87 | 37.20 | 43.45 | 56.80 | 60.94 | 61.81 | 55.97 | 47.00 | 27.90 | 21.00 | 41.98 | |||||||||||||
2016 | 23.14 | c | 26.68 | a | 32.90 | 39.37 | 44.77 | 59.27 | 63.68 | 59.71 | 52.27 | 45.26 | 32.57 | 25.81 | 42.12 | |||||||||||
2017 | 28.16 | 31.93 | 34.94 | 38.87 | 44.71 | 56.27 | 63.77 | 59.23 | 50.77 | 40.74 | 35.40 | 23.15 | e | 42.33 | ||||||||||||
2018 | 26.13 | 26.61 | 33.26 | 42.60 | 47.55 | 56.70 | 64.13 | 61.16 | 54.23 | 43.97 | 28.37 | 25.69 | e | 42.53 | ||||||||||||
2019 | 28.33 | y | 23.50 | 33.16 | 40.73 | 41.65 | 53.27 | 61.23 | 60.45 | k | 53.46 | f | 39.56 | m | ----- | z | ----- | z | 42.26 | f | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.75 | 24.37 | 28.78 | 34.57 | 41.61 | 50.40 | 59.32 | 57.45 | 49.39 | 38.44 | 27.67 | 21.75 | 37.68 | |||||||||||||
S.D. | 4.07 | 4.20 | 3.57 | 3.42 | 3.71 | 4.13 | 3.16 | 3.02 | 3.16 | 3.13 | 3.71 | 3.35 | 2.54 | |||||||||||||
SKEW | 0.29 | -0.23 | 0.13 | 0.46 | 0.67 | 0.34 | -0.30 | -0.30 | -0.11 | 0.44 | -0.07 | -0.27 | 0.49 | |||||||||||||
MAX | 30.88 | 32.69 | 35.57 | 42.60 | 52.69 | 62.43 | 66.70 | 63.29 | 55.97 | 47.00 | 35.40 | 29.29 | 42.53 | |||||||||||||
MIN | 14.13 | 14.14 | 22.10 | 28.67 | 35.90 | 42.27 | 50.10 | 50.84 | 42.83 | 31.61 | 20.37 | 13.71 | 33.06 | |||||||||||||
YRS | 51 | 50 | 51 | 55 | 55 | 58 | 58 | 57 | 50 | 52 | 51 | 50 | 37 |