YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.13 | 49.58 | 53.23 | 46.93 | 43.16 | 38.20 | 33.61 | 45.12 | e | |||||||
1949 | 27.58 | 33.79 | 40.00 | 41.60 | 45.94 | 46.75 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.78 | g | |||||
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 | 46.93 | 49.97 | 52.35 | 48.43 | 46.27 | a | 43.20 | 39.35 | 46.64 | e | ||||||
1954 | 33.77 | 37.59 | a | 30.65 | 39.20 | 42.61 | 46.53 | 49.29 | 50.61 | 49.10 | 43.58 | 43.30 | 37.94 | 42.01 | ||||||||||||
1955 | 36.06 | 34.36 | 33.71 | 35.10 | 42.06 | 47.93 | 51.00 | 45.32 | 45.60 | 44.26 | 36.00 | 34.26 | d | 40.47 | ||||||||||||
1956 | 35.62 | b | 32.54 | a | 35.94 | 39.27 | 43.00 | 47.80 | 50.10 | 50.60 | a | 46.60 | 42.77 | 37.23 | 37.23 | 41.56 | ||||||||||
1957 | 30.06 | 34.68 | 38.90 | 41.73 | 44.94 | 48.07 | 48.29 | 49.45 | 49.87 | 44.17 | a | 37.00 | 39.27 | a | 42.20 | |||||||||||
1958 | 40.33 | d | 43.54 | 35.71 | 39.80 | 46.65 | 53.23 | 52.06 | 49.06 | 48.77 | 44.87 | 36.30 | 42.39 | 44.39 | ||||||||||||
1959 | 38.13 | 37.22 | a | 38.13 | 40.87 | 41.68 | 48.67 | 49.55 | 48.68 | 46.93 | 44.65 | 37.63 | 35.61 | 42.31 | ||||||||||||
1960 | 35.90 | 35.14 | 38.45 | 41.03 | 43.90 | 45.97 | 46.45 | 51.16 | 46.07 | 45.55 | 39.30 | 36.97 | 42.16 | |||||||||||||
1961 | 39.90 | 40.54 | 38.68 | 40.83 | 44.42 | 47.83 | 53.00 | 51.13 | 46.47 | 41.65 | 36.33 | 37.48 | 43.19 | |||||||||||||
1962 | 33.32 | 37.00 | 34.39 | 41.40 | 43.52 | 46.03 | 47.81 | 49.61 | 47.70 | 45.81 | 41.97 | 38.48 | 42.25 | |||||||||||||
1963 | 30.67 | a | 41.57 | 36.19 | 40.23 | 43.58 | 47.30 | 51.97 | 51.45 | 50.37 | 46.84 | 41.00 | 39.03 | 43.35 | ||||||||||||
1964 | 38.16 | 33.34 | 36.35 | 37.33 | 41.10 | 47.50 | 49.55 | 48.06 | 46.87 | 43.26 | 35.07 | a | 32.74 | 40.78 | ||||||||||||
1965 | 35.84 | 38.04 | 35.16 | 40.23 | 42.84 | 46.70 | 48.61 | 50.45 | 45.03 | 45.19 | 44.00 | 35.29 | 42.28 | |||||||||||||
1966 | 36.84 | 37.67 | a | 36.42 | 41.00 | 42.29 | 46.77 | 49.55 | 47.61 | 48.47 | 43.10 | 41.13 | 40.55 | 42.62 | ||||||||||||
1967 | 39.00 | 37.04 | 35.16 | 35.40 | 41.97 | 49.03 | 48.90 | 50.06 | 48.83 | 46.35 | 40.23 | 35.68 | 42.31 | |||||||||||||
1968 | 35.19 | 37.28 | 39.48 | 38.17 | 44.71 | 48.23 | 50.39 | 50.03 | a | 50.37 | 43.93 | a | 41.40 | 33.74 | 42.74 | |||||||||||
1969 | 30.35 | 33.86 | 36.77 | 40.21 | a | 44.42 | 51.80 | 49.87 | 46.90 | 48.63 | 41.77 | 39.83 | 38.43 | a | 41.91 | |||||||||||
1970 | 36.06 | 38.43 | ----- | z | 38.40 | 42.07 | a | 46.50 | 49.03 | a | 47.41 | n | 44.30 | g | 42.39 | m | 39.96 | d | 35.13 | a | 40.70 | d | ||||
1971 | 36.17 | b | 37.07 | a | 36.52 | 40.04 | d | 44.29 | 46.57 | b | 49.34 | b | 50.96 | d | 45.38 | a | 42.23 | 39.82 | b | 33.97 | b | 41.86 | ||||
1972 | 33.79 | b | 35.21 | 38.32 | 37.27 | 44.13 | 46.69 | a | 46.19 | 48.77 | 43.80 | 37.68 | ----- | z | ----- | z | 41.19 | b | ||||||||
1973 | ----- | z | 36.32 | c | 37.16 | 39.50 | 42.84 | 47.17 | 46.84 | 46.39 | 47.80 | 43.00 | ----- | z | ----- | z | 43.00 | c | ||||||||
1974 | ----- | z | 36.39 | 38.16 | 40.76 | a | 43.23 | a | 46.27 | h | 48.00 | n | 48.19 | 46.77 | 39.77 | 40.47 | ----- | z | 41.72 | d | ||||||
1975 | ----- | z | 34.58 | b | 35.06 | 35.77 | 42.23 | 44.30 | 49.81 | 49.84 | 47.40 | 43.16 | 40.12 | m | 35.90 | a | 41.80 | b | ||||||||
1976 | 34.47 | a | 33.10 | 34.10 | 37.60 | 41.10 | 44.48 | a | 47.84 | 49.73 | a | 46.43 | 40.28 | b | 35.38 | d | 36.64 | i | 40.41 | a | ||||||
1977 | 31.86 | b | 37.04 | c | 35.66 | b | 39.13 | 41.97 | 47.50 | 46.90 | 50.04 | h | 44.70 | 40.83 | a | 35.04 | b | 36.17 | a | 39.71 | a | |||||
1978 | 37.21 | b | 39.30 | a | 37.87 | a | 40.14 | a | 42.58 | 48.33 | 51.13 | 52.90 | k | 49.73 | 41.57 | a | 34.18 | h | 28.40 | a | 41.63 | b | ||||
1979 | 27.88 | o | 37.33 | p | 37.45 | 40.81 | c | 44.43 | j | 44.07 | 45.65 | 49.10 | b | 50.57 | 45.57 | a | 37.82 | h | 38.12 | o | 44.75 | e | ||||
1980 | 33.36 | i | 37.25 | a | 38.03 | 40.07 | 43.52 | 45.62 | f | 50.19 | d | 47.04 | f | 47.37 | 43.37 | a | 40.56 | c | 35.33 | j | 42.54 | d | ||||
1981 | 38.71 | 34.89 | 40.03 | a | 39.53 | 42.74 | ----- | z | 49.74 | ----- | z | ----- | z | 38.90 | ----- | z | ----- | z | 40.65 | e | ||||||
1982 | ----- | z | ----- | z | ----- | z | 32.88 | v | 43.31 | e | 49.14 | a | 49.69 | e | 50.16 | 49.63 | 46.66 | b | 37.30 | 35.80 | a | 45.21 | d | |||
1983 | 39.26 | 41.81 | b | 41.55 | 40.57 | 47.10 | a | 49.14 | a | 52.62 | b | 50.38 | b | 47.03 | 39.40 | a | 42.81 | d | 30.97 | b | 43.55 | |||||
1984 | 38.23 | a | 38.64 | a | 40.68 | 39.37 | 43.43 | a | 47.97 | 47.29 | 48.07 | a | 47.31 | d | 42.39 | 39.87 | 33.07 | b | 42.19 | |||||||
1985 | 31.10 | a | 33.04 | a | 34.45 | 40.13 | 44.92 | f | 46.07 | a | 49.93 | a | 48.39 | 45.90 | a | 42.77 | 31.69 | a | 31.55 | 39.55 | a | |||||
1986 | 39.67 | a | 35.77 | b | 43.27 | a | 39.00 | c | 45.42 | 49.63 | 50.90 | 51.35 | 46.67 | c | 46.71 | 41.10 | a | 39.00 | 44.04 | |||||||
1987 | 37.52 | 38.78 | a | 40.90 | a | 42.50 | 45.23 | i | 49.20 | e | 51.48 | 51.27 | a | 48.57 | b | 43.07 | a | 44.24 | a | 34.00 | d | 43.77 | a | |||
1988 | 36.19 | 39.52 | 38.42 | 42.40 | 44.60 | a | 47.57 | 50.35 | 50.74 | 47.03 | a | 48.48 | d | 41.07 | a | 37.62 | b | 43.67 | ||||||||
1989 | 35.72 | b | 30.21 | 38.30 | a | 42.93 | 45.48 | 49.90 | 52.13 | a | 52.16 | 46.34 | a | 43.28 | b | 41.48 | c | 38.94 | 43.07 | |||||||
1990 | 39.26 | 35.46 | 39.65 | 44.33 | 45.84 | 50.57 | 52.47 | a | 53.23 | 53.00 | b | 42.32 | 40.77 | 31.55 | 44.04 | |||||||||||
1991 | 35.06 | 41.63 | a | 36.40 | a | 40.80 | 45.71 | 49.37 | 51.45 | 52.58 | 50.33 | 41.10 | b | 41.83 | 39.87 | 43.85 | ||||||||||
1992 | 39.57 | a | 41.37 | b | 40.97 | 43.57 | 45.45 | 51.20 | 52.48 | 51.93 | b | 45.19 | c | 45.32 | 40.13 | 33.94 | 44.26 | |||||||||
1993 | 32.29 | 33.57 | 39.17 | a | 43.63 | 49.27 | a | 50.93 | 54.06 | 53.35 | 47.57 | 45.67 | a | 33.80 | 37.45 | 43.40 | ||||||||||
1994 | 40.19 | 34.63 | a | 40.16 | 45.00 | 46.10 | 49.20 | 52.10 | 52.39 | 51.10 | 40.57 | a | 35.71 | b | 37.26 | 43.70 | ||||||||||
1995 | 40.93 | c | 39.08 | b | 38.03 | a | 40.59 | a | 46.42 | 49.57 | 53.77 | 49.13 | 54.70 | 44.28 | b | 44.59 | a | 38.86 | c | 44.99 | ||||||
1996 | 37.32 | 36.28 | 38.26 | 44.27 | 44.39 | 47.97 | 50.77 | 50.11 | l | ----- | z | 39.94 | m | 38.52 | a | 34.24 | n | 42.22 | d | |||||||
1997 | 36.72 | m | 36.67 | a | 38.43 | c | 41.40 | 47.65 | 50.90 | a | 52.35 | 53.67 | a | 53.00 | 45.32 | 42.87 | 37.26 | d | 45.41 | a | ||||||
1998 | 39.34 | b | 40.63 | a | 40.14 | b | 39.27 | 47.61 | 51.53 | 54.00 | a | 52.06 | 47.21 | a | 42.43 | a | 42.85 | c | 35.60 | a | 44.39 | |||||
1999 | 37.00 | a | 36.62 | g | 35.43 | j | 38.79 | b | 42.61 | 48.50 | 49.57 | a | 53.48 | 46.62 | a | 40.69 | b | 43.70 | 38.23 | 43.92 | b | |||||
2000 | 35.33 | a | 37.90 | 36.52 | 41.43 | 45.74 | 49.00 | 52.48 | 51.52 | 48.57 | 43.71 | 35.37 | 36.65 | 42.85 | ||||||||||||
2001 | 37.61 | 33.00 | 38.87 | 39.53 | 43.73 | a | 46.41 | a | 50.06 | 52.00 | a | 48.90 | 42.45 | 39.73 | 36.84 | 42.43 | ||||||||||
2002 | 38.29 | 35.85 | a | 36.42 | 39.79 | a | 43.07 | a | 48.68 | h | 49.35 | k | 48.79 | b | 46.14 | a | 42.61 | 40.33 | 39.35 | 41.07 | b | |||||
2003 | 40.65 | 34.82 | ----- | z | 41.93 | 43.47 | a | 49.60 | 51.19 | 50.50 | a | 48.07 | a | 48.13 | 37.43 | 37.60 | a | 43.94 | a | |||||||
2004 | 37.45 | 38.69 | ----- | z | 41.40 | 46.77 | 51.17 | 54.00 | 55.74 | 48.70 | ----- | z | ----- | z | ----- | z | 46.74 | d | ||||||||
2005 | ----- | z | ----- | z | 40.48 | 42.73 | 50.39 | 51.30 | 52.65 | 51.84 | 45.03 | a | 45.59 | b | 37.67 | 36.81 | 45.45 | b | ||||||||
2006 | 41.93 | a | 34.96 | a | 37.71 | 41.31 | a | 44.74 | 50.43 | 50.77 | a | 50.16 | 47.90 | a | 41.87 | a | 40.17 | 37.33 | a | 43.27 | ||||||
2007 | 33.55 | 39.07 | a | 40.84 | 41.07 | 44.48 | 48.03 | 54.35 | 52.29 | 48.57 | b | 42.74 | 37.48 | a | 35.85 | e | 43.19 | |||||||||
2008 | 32.48 | 36.59 | 37.35 | 36.53 | 46.50 | a | 47.43 | 49.68 | 52.55 | 47.20 | 41.55 | 43.37 | 33.39 | 42.05 | ||||||||||||
2009 | 33.84 | 34.18 | 35.32 | 38.20 | 43.76 | b | 49.13 | 51.90 | 53.23 | 48.25 | b | 42.55 | 41.80 | 32.13 | 42.02 | |||||||||||
2010 | 41.84 | 40.07 | 39.84 | 42.00 | 43.97 | a | 48.87 | 51.00 | 51.90 | 51.40 | 44.74 | 39.07 | 39.32 | 44.50 | ||||||||||||
2011 | 37.48 | 33.61 | 39.65 | 38.60 | 43.45 | 50.59 | a | 52.00 | 45.14 | x | 48.83 | a | 34.33 | p | 26.89 | u | ----- | z | 43.03 | d | ||||||
2012 | ----- | z | 26.71 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.11 | v | 29.29 | w | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.36 | 36.74 | 37.78 | 40.27 | 44.30 | 48.45 | 50.45 | 50.63 | 48.00 | 43.39 | 39.56 | 36.28 | 42.89 | |||||||||||||
S.D. | 3.27 | 2.79 | 2.34 | 2.11 | 1.96 | 1.97 | 2.07 | 2.05 | 2.14 | 2.27 | 2.98 | 2.80 | 1.06 | |||||||||||||
SKEW | -0.53 | 0.24 | -0.35 | -0.22 | 0.81 | 0.02 | -0.23 | -0.22 | 0.80 | -0.05 | -0.40 | -0.49 | -0.07 | |||||||||||||
MAX | 41.93 | 43.54 | 43.27 | 45.00 | 50.39 | 53.23 | 54.35 | 55.74 | 54.70 | 48.48 | 44.59 | 42.39 | 44.99 | |||||||||||||
MIN | 27.58 | 30.21 | 30.65 | 35.10 | 41.10 | 44.07 | 45.65 | 45.32 | 43.80 | 37.68 | 31.69 | 28.40 | 40.47 | |||||||||||||
YRS | 51 | 55 | 54 | 58 | 56 | 56 | 58 | 53 | 57 | 56 | 52 | 50 | 36 |