YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.00 | r | ----- | z | ----- | z | 28.80 | a | 28.80 | k |
1961 | 29.80 | a | 32.89 | a | 32.57 | a | 34.50 | b | 40.65 | 49.37 | 49.61 | 52.06 | 41.73 | 36.93 | a | 29.41 | a | 29.10 | a | 38.22 | ||||||
1962 | 24.55 | 27.68 | 29.39 | 36.03 | 38.45 | 42.93 | 46.63 | a | 48.26 | 45.93 | 37.84 | 34.83 | a | 30.19 | 36.89 | |||||||||||
1963 | 23.07 | c | 33.81 | a | ----- | z | ----- | z | 39.16 | 45.63 | 45.71 | 48.10 | 48.83 | ----- | z | 33.93 | ----- | z | 39.78 | d | ||||||
1964 | ----- | z | 26.93 | ----- | z | ----- | z | ----- | z | ----- | z | 48.32 | 47.55 | 41.00 | 38.19 | 30.80 | 28.52 | 37.33 | e | |||||||
1965 | 29.29 | 29.21 | 29.00 | 36.17 | 35.77 | 43.23 | 48.19 | 49.10 | 39.00 | 38.39 | 34.77 | 26.77 | 36.57 | |||||||||||||
1966 | 27.10 | 27.04 | 27.45 | 31.67 | 37.74 | 43.53 | 47.03 | 47.45 | 44.20 | 35.45 | 34.87 | 30.90 | 36.20 | |||||||||||||
1967 | 30.55 | 28.39 | 28.81 | 30.37 | 36.16 | 46.67 | 48.19 | 49.71 | 46.07 | 37.74 | 34.57 | 27.45 | 37.06 | |||||||||||||
1968 | 25.48 | 30.72 | 31.61 | 30.93 | 38.13 | 44.03 | ----- | z | 49.39 | 44.40 | 36.00 | 32.47 | 27.45 | 35.51 | a | |||||||||||
1969 | 23.71 | 26.68 | 26.81 | 31.60 | 39.74 | 48.63 | 47.13 | 45.26 | 44.33 | 35.13 | 31.27 | 31.06 | 35.95 | |||||||||||||
1970 | 29.23 | 29.50 | 29.84 | 30.37 | 36.81 | 47.00 | 47.71 | 44.68 | 39.83 | 34.74 | 33.20 | 26.77 | 35.81 | |||||||||||||
1971 | 24.19 | 27.30 | a | 26.06 | 29.48 | a | 36.13 | 41.45 | a | 48.00 | 49.59 | b | 41.37 | 33.55 | 30.50 | 27.40 | a | 34.58 | ||||||||
1972 | 23.52 | 28.14 | 31.17 | a | 30.67 | 38.52 | 44.00 | 49.31 | b | 49.06 | 40.86 | b | 36.58 | ----- | z | 26.50 | e | 36.21 | a | |||||||
1973 | 23.63 | a | 29.86 | 31.58 | 32.70 | 39.90 | 44.14 | a | 46.77 | 45.39 | 43.47 | 36.65 | 31.50 | 31.52 | 36.43 | |||||||||||
1974 | 23.52 | 29.39 | 29.87 | 32.67 | 37.23 | 43.40 | 47.58 | 48.19 | 44.23 | 35.48 | 33.33 | 30.26 | 36.26 | |||||||||||||
1975 | 28.29 | 27.89 | 29.84 | 30.57 | 36.10 | 43.17 | 51.06 | 47.19 | 44.23 | 40.42 | 31.13 | 30.48 | 36.70 | |||||||||||||
1976 | 28.74 | 27.66 | 28.19 | 32.57 | 37.19 | 41.17 | 47.87 | 49.52 | 46.33 | 36.23 | 34.90 | a | 27.84 | 36.52 | ||||||||||||
1977 | 24.97 | 31.07 | 30.23 | 33.60 | 36.00 | 45.97 | ----- | z | 52.29 | 44.63 | 37.71 | 31.47 | 33.74 | 36.52 | a | |||||||||||
1978 | 31.29 | 31.54 | 33.87 | 34.27 | 38.71 | 46.93 | 50.19 | 48.71 | 43.97 | 37.74 | 26.90 | 24.06 | 37.35 | |||||||||||||
1979 | 20.43 | a | 28.75 | 31.16 | 35.57 | 39.81 | 44.23 | 48.03 | a | 49.10 | 45.87 | 42.58 | 30.93 | 31.68 | 37.34 | |||||||||||
1980 | 25.58 | 32.52 | 32.10 | 34.57 | 39.71 | 44.57 | 48.90 | 44.23 | 42.40 | 37.94 | 35.07 | 29.94 | 37.29 | |||||||||||||
1981 | 32.00 | 30.46 | 31.87 | 35.57 | 40.35 | 44.30 | 46.19 | 48.68 | 44.30 | 36.80 | a | 33.73 | 31.32 | 37.97 | ||||||||||||
1982 | 27.71 | 26.50 | 30.65 | 30.55 | a | 36.10 | a | 47.03 | 48.65 | 48.97 | 43.46 | b | 38.03 | 30.86 | a | 29.77 | 36.52 | |||||||||
1983 | 31.48 | 33.32 | 34.42 | 33.80 | 40.50 | a | 44.52 | a | 48.42 | 50.65 | 42.23 | 42.35 | 35.63 | 26.17 | a | 38.62 | ||||||||||
1984 | 28.19 | 30.52 | 33.94 | 34.04 | b | 38.40 | a | 42.41 | a | 48.68 | 47.81 | 41.80 | 37.13 | 32.40 | 26.84 | 36.85 | ||||||||||
1985 | 26.07 | b | 25.93 | 28.65 | 34.43 | 38.61 | 44.03 | a | 49.81 | 45.37 | a | 41.30 | c | 36.43 | c | 25.92 | e | 25.21 | c | 35.15 | ||||||
1986 | 32.43 | c | 32.07 | a | 34.15 | e | 33.15 | c | 40.15 | e | 47.89 | c | 46.70 | a | 49.63 | d | ----- | z | 39.06 | 38.97 | a | 29.97 | a | 38.56 | a | |
1987 | 26.52 | 30.64 | 32.76 | b | 36.43 | b | 42.90 | b | 45.93 | 49.26 | 46.61 | 44.41 | a | ----- | z | 34.80 | 28.06 | 38.03 | a | |||||||
1988 | 26.87 | a | 27.36 | a | 31.19 | 36.73 | 39.26 | 45.53 | 49.03 | b | 47.77 | a | 42.59 | a | 42.59 | b | 35.07 | 28.90 | 37.74 | |||||||
1989 | 28.32 | 23.96 | e | 30.77 | 36.73 | 39.07 | b | 46.63 | 49.21 | c | 48.42 | 43.34 | a | 36.21 | b | 32.83 | 28.52 | b | 37.00 | |||||||
1990 | 31.50 | a | 25.75 | 29.83 | a | 36.63 | 38.60 | a | 46.40 | 50.42 | 50.80 | a | 47.60 | 36.52 | b | 33.72 | a | 23.89 | c | 37.64 | ||||||
1991 | 24.71 | 32.57 | 31.03 | 34.03 | 38.00 | 43.41 | a | 49.17 | a | 50.29 | 44.53 | 37.29 | 35.25 | b | 31.10 | b | 37.62 | |||||||||
1992 | 30.71 | 33.66 | 33.87 | a | 38.97 | a | 42.10 | 48.37 | 49.42 | 48.94 | 43.23 | 38.70 | a | 32.67 | 27.90 | 39.04 | ||||||||||
1993 | 22.90 | 24.93 | 31.45 | 36.03 | 41.77 | 45.30 | 46.32 | 48.39 | 42.27 | 39.67 | a | 25.43 | 29.20 | a | 36.14 | |||||||||||
1994 | 30.48 | 28.36 | 30.90 | 36.63 | 42.55 | 43.27 | 49.55 | 46.94 | 45.73 | 36.68 | 27.73 | 27.07 | b | 37.16 | ||||||||||||
1995 | 30.58 | 30.59 | a | 30.87 | 33.73 | 40.55 | 46.24 | a | 51.74 | 45.23 | 47.73 | 37.39 | 37.71 | b | 32.27 | a | 38.72 | |||||||||
1996 | 31.26 | 25.69 | 30.26 | 35.07 | a | 38.45 | 43.03 | a | 49.87 | a | 47.94 | 41.33 | 38.06 | 33.03 | 30.13 | 37.01 | ||||||||||
1997 | 26.97 | a | 29.86 | 31.61 | 33.60 | 40.55 | 42.79 | b | 48.13 | 51.55 | b | 46.31 | a | 38.13 | a | 35.50 | 28.39 | 37.78 | ||||||||
1998 | 32.16 | 31.46 | 31.00 | 34.53 | 41.77 | a | 45.55 | a | 53.34 | b | 48.77 | a | 45.30 | 37.57 | a | 34.93 | 25.52 | 38.49 | ||||||||
1999 | 29.00 | b | 29.04 | 29.60 | a | 31.67 | 36.16 | 43.07 | c | 45.97 | 51.43 | a | 40.31 | a | 36.38 | b | 36.61 | b | 30.42 | 36.64 | ||||||
2000 | 28.40 | a | 30.48 | 29.65 | 35.40 | 40.42 | 44.90 | a | 48.03 | 46.23 | a | 44.62 | a | 37.90 | j | 28.95 | i | 28.50 | k | 38.68 | c | |||||
2001 | 27.76 | j | 26.63 | i | 32.00 | i | 33.29 | i | 38.32 | i | 42.43 | i | 48.00 | k | 49.64 | i | 43.31 | n | 36.29 | j | 34.15 | j | 29.48 | j | ----- | z |
2002 | 25.86 | j | 26.32 | i | 29.10 | j | 32.41 | h | 35.60 | k | 43.56 | l | 50.40 | k | 46.60 | k | 41.84 | k | 32.86 | i | 30.71 | i | 30.67 | j | ----- | z |
2003 | 32.05 | k | 27.58 | i | 33.05 | j | 33.50 | h | 38.23 | i | 45.40 | j | 48.81 | j | 48.87 | h | 45.19 | d | 39.12 | e | 30.32 | h | 29.89 | c | 38.07 | i |
2004 | 28.04 | h | 29.96 | a | 31.30 | a | 35.14 | a | 40.39 | h | 45.12 | f | 48.35 | n | 51.29 | c | 44.73 | h | 39.50 | g | 30.56 | e | 29.28 | f | 35.65 | g |
2005 | 27.55 | k | 26.62 | d | 32.04 | g | 36.05 | i | 42.91 | i | 43.75 | j | 50.96 | g | 48.80 | f | 40.25 | f | 38.76 | j | 31.88 | d | 27.00 | e | 28.50 | i |
2006 | 31.14 | c | 25.64 | c | 29.24 | f | 35.42 | f | 44.77 | e | ----- | z | 54.22 | h | 48.64 | c | 45.10 | a | 38.85 | d | ----- | z | ----- | z | 39.03 | f |
2007 | 24.00 | h | 29.74 | e | 31.14 | j | 33.96 | g | ----- | z | 43.80 | j | 54.23 | e | 47.56 | f | ----- | z | 36.37 | d | ----- | z | 27.17 | g | 40.11 | i |
2008 | 24.12 | g | 28.04 | b | 27.59 | d | 28.69 | d | 38.77 | 39.96 | f | 48.87 | 50.10 | 43.90 | 39.52 | 35.73 | 27.90 | b | 36.91 | b | ||||||
2009 | 26.68 | 27.00 | 29.87 | 32.10 | 40.32 | 47.83 | a | 51.39 | 49.39 | 44.25 | j | 37.65 | 31.33 | 25.06 | 36.24 | a | ||||||||||
2010 | 32.71 | 31.57 | 29.81 | 32.47 | 38.81 | 44.73 | 49.26 | 49.42 | 46.70 | 40.32 | 32.77 | 29.42 | 38.17 | |||||||||||||
2011 | 27.45 | 27.19 | a | 28.42 | 31.60 | 37.10 | 44.27 | 47.10 | 49.35 | 46.17 | 41.26 | 31.63 | c | 26.29 | 36.48 | |||||||||||
2012 | 28.26 | 27.86 | 28.97 | 36.20 | 37.97 | 44.20 | 49.90 | 48.45 | ----- | z | 38.45 | 34.37 | 30.29 | 36.81 | a | |||||||||||
2013 | 24.23 | 28.61 | 31.03 | 34.70 | 40.52 | 45.43 | 50.71 | 51.32 | 47.83 | 34.90 | 32.93 | 25.03 | a | 37.27 | ||||||||||||
2014 | 29.19 | 28.71 | 32.13 | 35.70 | 42.03 | 44.33 | 52.13 | 52.42 | 47.47 | 42.71 | 34.77 | 33.74 | 39.61 | |||||||||||||
2015 | 31.07 | b | 33.79 | 34.67 | a | 33.30 | 42.68 | 49.69 | a | 50.58 | 50.81 | 43.43 | 43.13 | 32.80 | 30.94 | 39.74 | ||||||||||
2016 | 29.10 | 32.28 | 33.13 | 38.67 | 42.68 | 46.37 | 49.23 | 48.13 | 42.53 | 41.61 | 36.97 | 25.58 | 38.86 | |||||||||||||
2017 | 19.62 | j | 30.17 | e | 31.74 | 33.50 | 41.10 | 47.70 | 50.58 | 51.77 | 46.79 | a | 36.35 | 33.87 | 28.74 | 39.30 | a | |||||||||
2018 | 32.48 | 28.52 | a | 30.00 | 35.47 | 43.26 | 45.10 | 50.32 | 50.10 | 42.40 | 38.94 | 32.83 | 29.90 | 38.28 | ||||||||||||
2019 | 29.77 | a | 26.56 | a | 27.31 | b | 36.47 | 41.48 | 44.80 | 50.29 | 50.86 | b | 47.75 | b | 35.00 | 31.60 | 30.58 | 37.71 | ||||||||
2020 | 30.41 | b | 28.97 | 30.42 | 36.27 | 41.10 | ----- | z | 48.45 | 48.35 | 46.57 | 36.39 | 32.30 | c | 30.87 | 37.28 | a | |||||||||
2021 | 31.16 | 30.11 | a | 29.00 | 31.87 | 40.03 | 50.93 | 52.00 | 51.94 | 42.43 | 38.43 | a | 35.93 | b | 31.30 | a | 38.76 | |||||||||
2022 | 27.10 | 26.36 | 33.97 | a | 31.31 | a | 38.55 | 46.37 | 52.68 | c | 52.87 | 48.89 | b | 41.52 | 29.26 | c | 27.61 | 38.04 | ||||||||
2023 | 27.94 | 26.64 | 27.87 | a | 32.10 | 42.76 | b | 44.70 | 50.00 | b | 52.65 | n | ----- | z | 40.14 | b | 34.03 | a | 31.52 | h | 36.24 | c | ||||
2024 | 28.71 | 31.14 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.92 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.05 | 29.11 | 30.64 | 33.85 | 39.50 | 45.23 | 49.13 | 48.95 | 44.23 | 38.05 | 32.93 | 28.77 | 37.34 | |||||||||||||
S.D. | 3.00 | 2.40 | 2.02 | 2.34 | 2.17 | 2.07 | 1.86 | 2.05 | 2.36 | 2.25 | 2.72 | 2.30 | 1.13 | |||||||||||||
SKEW | -0.41 | 0.16 | 0.04 | -0.08 | 0.14 | 0.55 | 0.45 | -0.27 | -0.01 | 0.57 | -0.62 | -0.11 | 0.01 | |||||||||||||
MAX | 32.71 | 33.81 | 34.67 | 38.97 | 44.77 | 50.93 | 54.23 | 52.87 | 48.89 | 43.13 | 38.97 | 33.74 | 39.74 | |||||||||||||
MIN | 20.43 | 23.96 | 26.06 | 28.69 | 35.77 | 41.17 | 45.71 | 44.23 | 39.00 | 33.55 | 25.43 | 23.89 | 34.58 | |||||||||||||
YRS | 55 | 61 | 55 | 55 | 56 | 53 | 55 | 57 | 54 | 56 | 56 | 56 | 42 |