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 | 24.55 | a | 23.42 | 23.99 | j | |
1956 | 20.03 | a | 14.82 | a | 26.03 | 28.44 | e | 39.97 | 42.63 | 49.61 | 45.94 | 37.77 | 30.43 | a | 21.73 | 22.16 | 31.63 | |||||||||
1957 | 7.55 | 20.93 | a | 28.58 | 31.07 | 39.61 | 43.97 | 46.48 | 43.00 | 36.77 | 30.44 | d | 20.90 | 20.52 | 30.82 | |||||||||||
1958 | 19.32 | 29.68 | 23.39 | 32.17 | 42.97 | 45.70 | 48.90 | 49.97 | 36.60 | 28.94 | 25.03 | a | 22.60 | a | 33.77 | |||||||||||
1959 | 23.71 | 22.64 | 23.71 | 29.83 | 34.29 | 44.37 | 48.84 | 45.74 | 40.54 | d | 32.00 | 17.20 | 12.30 | a | 31.26 | |||||||||||
1960 | 14.52 | 22.24 | 25.89 | c | 30.56 | c | 33.61 | h | 43.00 | 53.07 | c | 44.74 | 38.63 | 29.71 | 25.13 | 17.86 | i | 32.75 | b | |||||||
1961 | 21.36 | i | 28.75 | 27.42 | 29.70 | 36.04 | f | 48.48 | a | 50.13 | a | 51.32 | 36.67 | c | 30.32 | f | 19.86 | b | 18.52 | b | 34.54 | c | ||||
1962 | 8.23 | a | 21.04 | a | 26.48 | b | 32.00 | a | 35.45 | 42.80 | 45.27 | a | 42.19 | d | 40.16 | k | 31.77 | a | 28.79 | a | 27.76 | j | 31.40 | b | ||
1963 | 10.85 | d | 33.44 | j | 26.65 | 30.11 | c | 40.45 | 44.38 | a | 45.60 | a | 46.43 | a | 44.07 | b | 34.50 | g | 28.10 | a | 16.12 | n | 35.18 | c | ||
1964 | 18.25 | c | 19.24 | 22.97 | 26.67 | 33.43 | a | 43.73 | 49.45 | ----- | z | ----- | z | 29.60 | p | 23.67 | 22.93 | p | 29.68 | d | ||||||
1965 | 24.56 | d | ----- | z | ----- | z | ----- | z | 33.52 | b | 44.17 | 45.86 | c | 45.90 | 33.76 | a | 29.41 | i | 28.07 | b | 17.70 | a | 34.19 | d | ||
1966 | 18.16 | 19.39 | 24.87 | 26.55 | j | 36.79 | b | 42.86 | b | 46.03 | 44.74 | 41.50 | d | 27.00 | f | 28.42 | d | 23.40 | a | 32.62 | b | |||||
1967 | 23.94 | 23.33 | a | 24.77 | 25.82 | h | 36.03 | b | 44.07 | a | 49.93 | a | 46.55 | b | 40.18 | b | 27.62 | g | 26.23 | 15.87 | 33.09 | b | ||||
1968 | 17.96 | e | 26.48 | 25.89 | c | 26.00 | j | 35.31 | b | 43.37 | c | 49.58 | 47.72 | b | 38.07 | 28.52 | j | 29.62 | a | 22.90 | a | 33.69 | b | |||
1969 | 20.97 | a | 18.54 | b | 21.55 | 30.74 | g | 39.86 | b | 46.67 | 47.84 | 44.19 | 40.48 | e | 27.04 | e | 22.07 | b | 23.16 | 32.03 | a | |||||
1970 | 23.68 | 25.07 | a | 26.13 | 25.62 | f | 36.81 | 46.03 | a | 48.71 | 44.61 | 32.63 | 29.15 | k | 28.97 | 17.81 | 33.05 | b | ||||||||
1971 | 23.23 | 23.54 | 23.16 | 27.80 | e | 37.56 | d | 42.52 | a | 48.70 | d | 49.19 | 32.55 | a | 26.75 | k | 25.37 | 18.57 | a | 32.02 | a | |||||
1972 | 13.29 | g | 22.48 | 30.70 | d | 28.96 | c | 35.68 | c | 45.54 | f | 47.24 | f | 47.26 | 32.73 | 29.40 | a | 27.78 | c | 8.96 | d | 29.33 | c | |||
1973 | 19.06 | 25.71 | 25.93 | a | 28.86 | b | 37.44 | d | 42.56 | e | 47.21 | b | 45.45 | 38.73 | d | 28.48 | 27.84 | e | ----- | z | 33.39 | a | ||||
1974 | 18.04 | c | 22.92 | b | 26.66 | b | 30.08 | d | 33.83 | g | 42.32 | e | 49.93 | q | 41.90 | b | 36.29 | f | 25.83 | g | 22.00 | c | ----- | z | 29.13 | e |
1975 | 11.00 | k | 21.52 | c | 21.78 | h | 26.96 | d | 33.87 | h | 41.67 | l | 47.10 | u | 42.00 | l | 34.95 | j | 29.43 | q | 17.15 | q | 25.00 | q | 24.24 | j |
1976 | 22.71 | n | 20.21 | j | 19.52 | h | 29.30 | t | 34.12 | f | 38.39 | l | 46.30 | h | 45.08 | r | 39.80 | o | 26.72 | m | 22.25 | v | 9.62 | o | ----- | z |
1977 | 7.05 | i | 19.17 | e | 21.70 | d | 28.81 | c | 34.06 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.23 | i |
1978 | 26.52 | f | 25.81 | b | 30.10 | 31.50 | 35.29 | 42.27 | 49.54 | g | 44.52 | d | 37.00 | d | 25.79 | b | 17.79 | a | 13.90 | a | 30.40 | b | ||||
1979 | 8.50 | g | 26.57 | 29.00 | 31.30 | c | 39.44 | d | 43.77 | d | 49.74 | d | 50.12 | o | 40.00 | f | 34.64 | f | 19.89 | c | 23.07 | a | 32.85 | d | ||
1980 | 19.89 | d | 28.48 | 27.60 | a | 32.50 | b | 38.39 | 39.43 | i | 50.39 | 43.96 | c | 38.74 | c | 30.45 | 27.57 | b | 19.04 | c | 32.46 | a | ||||
1981 | 24.35 | e | 25.79 | i | 26.87 | a | 32.10 | a | 38.12 | f | 42.17 | a | 47.45 | 47.17 | b | 37.19 | c | 30.88 | e | 27.39 | b | 25.81 | 34.14 | b | ||
1982 | 13.36 | f | 26.25 | l | 28.23 | 27.63 | 34.86 | c | 44.61 | b | 48.34 | b | 47.40 | a | 37.52 | e | 31.77 | i | 20.33 | c | 18.58 | 34.17 | c | |||
1983 | 24.21 | b | 28.00 | b | 32.13 | 29.19 | d | 36.75 | c | 41.68 | h | 46.18 | n | ----- | z | 36.63 | ----- | z | ----- | z | ----- | z | 31.15 | f | ||
1984 | ----- | z | ----- | z | 29.50 | e | 30.96 | e | 37.88 | f | 37.40 | o | 50.53 | n | 48.03 | a | 36.13 | g | 30.19 | e | ----- | z | ----- | z | 34.67 | h |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | 30.31 | n | 46.07 | p | 39.69 | n | 40.43 | j | ----- | z | 36.22 | c | 29.42 | e | 27.68 | e | 14.71 | q | 31.11 | i |
1987 | 8.56 | d | 17.53 | k | 32.14 | i | 32.52 | e | 38.12 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.54 | j |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | 37.54 | d | 39.03 | 50.04 | b | 50.84 | 45.48 | 36.33 | 30.42 | 26.07 | b | 13.73 | a | 36.61 | c | |||||
1990 | 23.79 | c | 16.07 | 23.61 | 33.96 | c | 33.37 | a | 42.77 | 50.47 | a | 47.76 | b | 40.83 | 27.84 | f | 26.00 | 10.10 | 31.70 | a | ||||||
1991 | 13.90 | a | 23.75 | 24.42 | 29.30 | 35.00 | 38.53 | 45.87 | a | ----- | z | 40.03 | 29.23 | a | 28.33 | 20.93 | b | 29.94 | a | |||||||
1992 | 20.37 | a | 29.59 | 29.00 | 32.03 | 36.03 | 43.70 | 44.73 | a | 43.13 | a | 35.40 | 32.77 | a | 24.00 | 16.61 | 32.28 | |||||||||
1993 | 10.17 | a | 12.07 | 30.65 | 30.77 | 38.61 | 40.69 | a | 42.52 | 44.00 | 35.60 | 33.13 | 15.33 | 22.00 | 29.63 | |||||||||||
1994 | 20.97 | a | 20.04 | 26.65 | 32.03 | 38.29 | 44.13 | 48.97 | 44.83 | a | 35.27 | 31.81 | 18.20 | 16.52 | 31.47 | |||||||||||
1995 | 25.10 | a | 28.50 | 28.26 | 32.37 | ----- | z | 40.37 | 43.97 | 39.45 | 36.70 | 28.87 | 25.87 | ----- | z | 32.94 | b | |||||||||
1996 | 24.90 | 25.68 | d | 29.71 | 32.60 | 35.74 | 39.15 | c | 47.19 | j | 43.16 | ----- | z | 28.19 | ----- | z | 29.74 | 32.10 | c | |||||||
1997 | 18.77 | 24.79 | 29.74 | 32.00 | 37.71 | 37.23 | 42.97 | 41.52 | 35.33 | 28.61 | 24.43 | ----- | z | 32.10 | a | |||||||||||
1998 | 26.32 | 30.18 | 29.43 | a | 29.77 | 36.13 | 39.87 | 48.68 | 42.52 | 37.44 | c | 25.90 | 26.97 | 15.10 | 32.36 | |||||||||||
1999 | ----- | z | 21.93 | a | 24.19 | 32.63 | 33.03 | 38.87 | 47.84 | 40.19 | 33.87 | 35.29 | 29.90 | 16.74 | 32.23 | a | ||||||||||
2000 | 25.50 | a | 29.62 | 32.67 | a | 30.40 | 34.10 | 38.45 | a | 45.23 | 46.55 | 37.93 | b | 33.07 | a | 20.14 | i | 16.39 | 33.63 | a | ||||||
2001 | 12.38 | b | 18.54 | 27.81 | 29.83 | 33.87 | 35.41 | a | 45.13 | 46.03 | 35.93 | 25.13 | 20.97 | 23.71 | 29.56 | |||||||||||
2002 | 24.77 | 26.79 | 30.29 | 30.90 | 31.13 | 33.97 | 48.42 | 38.77 | 29.57 | 28.52 | 16.50 | 25.65 | 30.44 | |||||||||||||
2003 | 32.77 | a | 29.25 | 29.90 | 28.43 | 33.68 | 38.07 | 51.36 | c | 44.23 | a | 38.67 | 28.26 | 22.67 | 27.29 | 33.71 | ||||||||||
2004 | 16.45 | 22.41 | b | 29.48 | 31.67 | 35.26 | 35.67 | 44.16 | 39.68 | 34.20 | 27.74 | 26.57 | 27.35 | 30.89 | ||||||||||||
2005 | 24.10 | 25.61 | 28.58 | ----- | z | 34.52 | 33.47 | 45.35 | 39.29 | 30.73 | 28.84 | 26.80 | 14.62 | b | 30.17 | a | ||||||||||
2006 | 29.45 | 20.50 | 28.23 | ----- | z | 38.32 | 39.03 | 49.71 | 38.32 | 35.40 | ----- | z | 25.97 | 11.83 | a | 31.68 | b | |||||||||
2007 | 10.87 | 24.21 | 31.19 | 31.57 | 33.58 | 43.76 | a | 52.77 | 46.63 | a | 33.50 | 30.06 | 28.07 | 13.27 | a | 31.62 | ||||||||||
2008 | 4.66 | b | 23.41 | 22.48 | 25.30 | 33.32 | 37.00 | a | 41.39 | 46.13 | 32.50 | ----- | z | ----- | z | 17.07 | d | 28.33 | b | |||||||
2009 | 25.42 | ----- | z | ----- | z | ----- | z | 38.43 | x | 45.73 | s | 49.23 | r | 47.63 | l | 40.56 | l | 31.14 | q | 22.65 | j | 13.57 | h | 25.42 | k | |
2010 | 27.24 | j | 24.88 | k | 26.95 | k | 29.65 | j | 37.05 | i | 45.13 | g | 47.55 | i | 46.35 | h | 37.07 | p | 30.78 | m | 24.67 | r | 24.07 | p | ----- | z |
2011 | 20.11 | m | 18.00 | o | 31.35 | n | 31.93 | o | 38.33 | m | 43.29 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.49 | 23.55 | 27.16 | 30.56 | 36.27 | 41.82 | 47.69 | 44.66 | 36.59 | 29.70 | 24.53 | 19.11 | 31.50 | |||||||||||||
S.D. | 6.48 | 4.28 | 2.85 | 2.20 | 2.54 | 3.68 | 2.75 | 3.05 | 3.02 | 2.27 | 3.89 | 5.08 | 1.31 | |||||||||||||
SKEW | -0.49 | -0.46 | -0.19 | 0.25 | 0.42 | -0.37 | -0.28 | -0.28 | -0.03 | 0.19 | -0.72 | 0.04 | 0.32 | |||||||||||||
MAX | 32.77 | 30.18 | 32.67 | 37.54 | 42.97 | 50.04 | 53.07 | 51.32 | 44.07 | 35.29 | 29.90 | 29.74 | 33.77 | |||||||||||||
MIN | 4.66 | 12.07 | 21.55 | 25.30 | 31.13 | 33.47 | 41.39 | 38.32 | 29.57 | 25.13 | 15.33 | 8.96 | 29.56 | |||||||||||||
YRS | 40 | 42 | 45 | 41 | 40 | 42 | 40 | 42 | 41 | 31 | 43 | 37 | 13 |