YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1961 | 26.61 | l | 33.59 | 40.61 | 46.80 | 59.02 | 69.17 | c | 72.35 | 69.37 | a | 59.98 | 49.95 | 36.53 | a | 25.19 | 51.14 | a | ||||||||
1962 | 25.53 | 37.75 | 35.73 | a | 51.92 | 57.47 | 66.68 | 72.45 | a | 72.68 | 64.17 | 52.47 | 41.17 | a | 33.18 | a | 50.93 | |||||||||
1963 | 20.29 | b | 34.85 | a | 40.34 | 49.12 | 61.50 | 66.83 | a | 75.21 | 69.66 | 65.68 | 56.29 | 40.80 | 29.26 | 50.82 | ||||||||||
1964 | 25.47 | 22.64 | 34.85 | a | 45.50 | b | 58.53 | a | 66.84 | b | 74.27 | 69.13 | a | 61.48 | 53.63 | 38.96 | b | 29.70 | a | 48.42 | ||||||
1965 | 32.58 | 30.93 | 36.45 | b | 47.73 | 55.65 | 63.05 | 71.77 | 69.08 | a | 59.92 | 54.00 | 43.12 | 33.17 | a | 49.79 | ||||||||||
1966 | 25.08 | 27.34 | 41.77 | 49.22 | 60.50 | 66.52 | 75.15 | 70.22 | b | 62.62 | 51.33 | a | 42.15 | 28.62 | a | 50.04 | ||||||||||
1967 | 26.06 | 35.77 | 44.53 | 48.45 | 55.68 | a | 66.02 | c | 74.23 | 68.48 | 62.22 | 52.78 | a | 40.79 | a | 23.50 | g | 52.27 | a | |||||||
1968 | 26.41 | b | 36.86 | a | 40.03 | 43.81 | a | 55.29 | c | 67.45 | 71.00 | a | 67.32 | a | 62.00 | 52.00 | b | 36.77 | 24.90 | 48.65 | ||||||
1969 | 33.97 | a | 33.30 | a | 35.18 | 50.47 | 59.70 | a | 64.46 | e | 73.42 | e | 72.71 | 64.40 | a | 48.70 | a | 37.43 | 34.18 | 50.66 | ||||||
1970 | 29.03 | 37.00 | a | 36.32 | 42.91 | a | 57.87 | a | 60.61 | l | 72.67 | b | 72.44 | 61.74 | a | 46.40 | 39.35 | 31.16 | 47.90 | a | ||||||
1971 | 27.53 | 30.37 | b | 39.76 | 46.14 | a | 55.73 | 67.17 | f | 73.19 | e | 68.97 | 60.60 | 49.03 | 37.69 | a | 26.82 | c | 46.89 | a | ||||||
1972 | 29.70 | f | 35.95 | 45.82 | 49.42 | 56.71 | 66.71 | b | 73.98 | 68.21 | 62.75 | 53.12 | b | 33.75 | 28.22 | b | 52.24 | a | ||||||||
1973 | ----- | z | 31.75 | 36.75 | a | 42.16 | a | 55.95 | 65.17 | 70.47 | 69.80 | a | 61.68 | 52.29 | 41.00 | 30.31 | 50.67 | a | ||||||||
1974 | 26.50 | 30.91 | 45.37 | 47.10 | 60.60 | 70.82 | 70.11 | 66.11 | 60.02 | a | 51.32 | a | 38.12 | 24.15 | 49.26 | |||||||||||
1975 | 23.40 | a | 29.71 | 38.53 | a | 43.82 | 54.06 | 64.63 | 70.35 | 69.05 | a | 60.05 | 51.60 | 36.60 | 29.55 | 47.61 | ||||||||||
1976 | 26.28 | a | 38.59 | 38.81 | 48.07 | a | 57.98 | a | 67.35 | 71.76 | 69.23 | 61.72 | 47.45 | a | 35.20 | 24.94 | 48.95 | |||||||||
1977 | 21.47 | b | 31.82 | 36.25 | a | 50.29 | a | 57.27 | 69.55 | 72.27 | a | 71.52 | a | 64.47 | 53.22 | a | 40.25 | 34.98 | 50.28 | |||||||
1978 | 31.13 | a | 32.93 | 43.56 | 50.52 | a | 55.73 | 69.03 | 73.60 | 69.57 | b | 63.41 | a | 54.13 | 41.12 | b | 24.75 | a | 50.79 | |||||||
1979 | 21.61 | c | 28.35 | b | 40.00 | 48.88 | a | 55.73 | 65.72 | 72.18 | 68.89 | 65.67 | 54.32 | 33.61 | b | 31.88 | a | 48.90 | ||||||||
1980 | 32.87 | a | 36.17 | 37.70 | c | 46.53 | a | 55.62 | b | 69.38 | a | 74.23 | 71.26 | 62.75 | 49.65 | a | 38.62 | a | 36.82 | c | 50.97 | |||||
1981 | 33.81 | 35.30 | 37.94 | 51.65 | 54.24 | 68.98 | e | 72.82 | 70.93 | b | 64.00 | a | 50.76 | b | 41.57 | 33.21 | c | 51.27 | ||||||||
1982 | 28.06 | g | 29.44 | k | 40.70 | d | 47.14 | a | 55.20 | c | 66.15 | d | 71.12 | a | 70.02 | a | 63.34 | e | 48.29 | c | 37.88 | a | 30.00 | f | 55.54 | c |
1983 | 29.60 | a | 33.63 | b | 39.96 | q | 42.97 | a | 54.11 | 63.98 | a | 71.37 | 71.27 | 65.45 | 52.38 | a | 39.13 | 30.67 | b | 50.42 | a | |||||
1984 | 26.88 | a | 33.50 | b | 39.32 | a | 45.83 | a | 62.11 | 66.62 | 73.88 | c | 70.53 | 63.87 | 45.69 | 39.37 | 31.84 | c | 49.95 | |||||||
1985 | 27.76 | b | 29.91 | 42.17 | b | 50.06 | d | 58.35 | d | 68.90 | 72.34 | 71.19 | 59.38 | 52.02 | c | 37.90 | 30.16 | 50.01 | ||||||||
1986 | 35.18 | 37.68 | 45.10 | 50.45 | 58.50 | 67.73 | 69.98 | 72.00 | 61.21 | b | 48.77 | 38.83 | 32.39 | 51.49 | ||||||||||||
1987 | 25.98 | a | 33.89 | 38.32 | 49.45 | a | 56.15 | 67.20 | 71.23 | a | 68.65 | 61.80 | 53.76 | 38.45 | 28.18 | 49.42 | ||||||||||
1988 | 22.73 | 34.78 | 40.59 | c | 49.60 | 57.65 | a | 67.52 | 72.24 | 69.87 | 60.18 | 54.47 | 38.60 | 29.05 | a | 49.77 | ||||||||||
1989 | 27.06 | 35.80 | 46.58 | 54.32 | 60.87 | 68.26 | a | 72.57 | b | 69.53 | 64.60 | 50.56 | 39.32 | 29.24 | 51.56 | |||||||||||
1990 | 26.89 | 32.04 | b | 43.65 | a | 51.32 | b | 57.38 | b | 71.42 | d | 71.48 | 68.65 | 65.67 | 51.77 | 39.97 | 23.53 | 50.31 | ||||||||
1991 | 24.94 | 36.12 | 39.28 | a | 48.95 | 57.95 | 65.65 | 71.40 | b | 70.77 | 62.78 | 52.95 | 36.55 | b | 30.95 | 49.86 | ||||||||||
1992 | 25.34 | 36.90 | 44.00 | b | 53.52 | a | 58.48 | 66.88 | 70.63 | 69.37 | 63.73 | 54.05 | 34.25 | 24.89 | c | 50.17 | ||||||||||
1993 | 33.87 | 36.73 | 41.53 | 49.97 | 58.11 | 66.37 | 72.88 | a | 68.26 | 61.48 | 48.16 | b | 31.93 | 27.95 | 49.77 | |||||||||||
1994 | 31.41 | b | 31.45 | 44.25 | a | 49.72 | 60.23 | g | 72.08 | d | 75.14 | b | 73.13 | 63.74 | e | 51.24 | b | 36.79 | b | 33.52 | a | 51.13 | a | |||
1995 | 31.27 | 40.16 | 42.92 | a | 46.30 | b | 55.27 | a | 64.31 | a | 71.10 | a | 73.74 | 63.84 | a | 51.50 | c | 42.19 | c | 30.77 | k | 52.96 | a | |||
1996 | 31.79 | 38.91 | 40.48 | 50.52 | a | 63.15 | a | 69.88 | 73.71 | 71.19 | 60.95 | a | 50.33 | a | 39.75 | 32.48 | 51.93 | |||||||||
1997 | 26.95 | 34.86 | 44.60 | 46.16 | a | 59.48 | 67.25 | 71.80 | a | 70.26 | 65.83 | a | 50.10 | 37.95 | 26.56 | 50.15 | ||||||||||
1998 | 32.69 | 33.23 | 40.75 | a | 46.53 | a | 58.73 | 66.38 | 73.23 | 71.76 | b | 67.97 | a | 51.81 | 40.95 | 32.55 | 51.38 | |||||||||
1999 | 34.48 | a | 37.77 | 45.03 | 48.07 | a | 57.50 | 66.19 | a | 71.03 | 68.43 | a | 61.88 | 53.05 | 43.63 | 29.42 | 51.37 | |||||||||
2000 | 34.47 | 39.88 | 41.02 | 53.07 | b | 62.34 | 69.43 | 73.84 | 72.42 | 66.10 | 50.73 | 33.38 | 32.53 | 52.43 | ||||||||||||
2001 | 28.26 | 36.48 | 42.05 | 52.55 | 61.90 | 70.62 | a | 74.21 | 70.60 | a | 65.47 | 54.89 | 42.67 | a | 29.21 | 52.41 | ||||||||||
2002 | 29.90 | a | 33.95 | 40.69 | 54.86 | a | 61.40 | 71.22 | 74.12 | a | 70.88 | a | 63.32 | 50.55 | a | 38.75 | 30.24 | 51.66 | ||||||||
2003 | 35.97 | a | 35.12 | 40.71 | 49.37 | 59.31 | 67.38 | 76.87 | a | 71.71 | 63.50 | a | 55.33 | a | 40.40 | a | 32.34 | 52.33 | ||||||||
2004 | 31.24 | 30.02 | a | 46.93 | a | 48.26 | a | 58.52 | c | 66.04 | c | 70.95 | 68.98 | a | 61.55 | 50.23 | a | 37.84 | b | 29.83 | b | 50.03 | ||||
2005 | 36.65 | a | 37.36 | 39.12 | a | 49.47 | 59.29 | 65.67 | a | 74.30 | c | 69.91 | b | 65.26 | a | 52.28 | d | 41.36 | b | 30.97 | 51.80 | |||||
2006 | 31.28 | b | 34.16 | 40.90 | a | 52.88 | a | 61.70 | c | 70.39 | b | 73.20 | c | 69.37 | d | 58.58 | 50.36 | b | 40.75 | f | 27.85 | a | 51.88 | a | ||
2007 | 24.21 | b | 33.32 | 44.34 | 49.26 | a | 57.98 | e | 68.92 | d | 73.92 | a | 73.19 | d | 65.06 | d | 52.48 | a | 41.86 | b | 29.12 | c | 51.14 | |||
2008 | 24.91 | b | 33.41 | f | 41.81 | e | 47.40 | e | 54.65 | h | 68.17 | j | 71.78 | b | 71.07 | h | 63.43 | i | 51.04 | h | 40.73 | 31.15 | 42.96 | f | ||
2009 | 31.55 | a | 36.92 | b | 43.35 | 48.64 | b | 62.13 | a | 65.03 | a | 73.94 | 71.06 | 62.20 | b | 49.32 | 40.93 | 25.05 | 50.84 | |||||||
2010 | 27.00 | a | 31.36 | 40.94 | 49.85 | 56.76 | 69.29 | a | 74.29 | 70.81 | 66.78 | 53.81 | 37.10 | 35.87 | 51.15 | |||||||||||
2011 | 25.53 | 31.05 | 44.08 | 50.33 | 53.48 | e | 69.40 | 74.20 | a | 73.95 | 63.72 | a | 50.75 | a | 39.27 | 25.58 | 50.11 | |||||||||
2012 | 32.44 | 34.07 | 42.87 | a | 53.33 | 60.76 | 71.53 | 72.95 | 72.60 | 64.40 | 53.72 | a | 41.26 | a | 28.92 | 52.40 | ||||||||||
2013 | 22.68 | a | 31.04 | 43.52 | 49.92 | 59.18 | a | 71.83 | 72.79 | 71.16 | 63.68 | 49.34 | 38.93 | b | 28.90 | 50.25 | ||||||||||
2014 | 32.23 | c | 38.04 | 42.39 | 48.29 | a | 57.20 | a | 68.60 | 73.22 | a | 68.17 | a | 65.80 | 53.83 | d | 39.03 | a | 34.23 | a | 51.75 | |||||
2015 | 31.48 | 38.09 | a | 46.40 | a | 49.50 | c | 55.42 | 69.65 | 70.50 | 71.24 | 66.34 | e | 54.45 | b | 38.85 | c | 29.71 | b | 51.80 | ||||||
2016 | 27.97 | b | 37.57 | 44.76 | 49.77 | 56.76 | b | 72.68 | 75.03 | a | 67.77 | 63.40 | 56.53 | b | 42.88 | b | 34.08 | 52.43 | ||||||||
2017 | 33.82 | 40.96 | 46.83 | a | 49.60 | 57.27 | a | 71.28 | 73.42 | 70.10 | 64.35 | 53.77 | 47.11 | b | 34.95 | b | 53.62 | |||||||||
2018 | 34.10 | a | 37.63 | a | 42.72 | a | 53.55 | 61.26 | 71.52 | 74.15 | d | 72.03 | a | 66.58 | 51.98 | a | 37.41 | b | 31.71 | c | 52.89 | |||||
2019 | 29.87 | 33.94 | a | 44.03 | 51.42 | 53.73 | 65.98 | a | 73.87 | e | 73.06 | d | 66.55 | a | 48.93 | d | 39.46 | b | 32.46 | c | 51.11 | |||||
2020 | 30.72 | a | 35.33 | 44.29 | c | 50.28 | c | 62.38 | e | 70.30 | c | 73.95 | c | 74.95 | k | 64.83 | j | 55.60 | g | 41.03 | m | 26.63 | d | 49.23 | d | |
2021 | 30.43 | i | 32.00 | e | 41.24 | f | 49.70 | t | 68.12 | w | 73.11 | k | 74.07 | a | 71.96 | e | 65.77 | d | 50.85 | g | 42.93 | g | 34.56 | e | 55.67 | g |
2022 | 30.75 | c | 29.57 | f | 42.08 | e | 52.25 | d | 61.52 | c | 70.59 | c | 74.91 | b | 70.77 | c | 66.69 | d | 50.63 | e | 35.10 | j | 33.21 | g | 57.80 | c |
2023 | 30.54 | h | 31.78 | c | 37.81 | m | 48.92 | f | 59.05 | k | 67.81 | q | 77.11 | i | 72.67 | h | 64.76 | k | ----- | z | ----- | z | 32.66 | b | 32.22 | j |
2024 | 28.53 | a | 36.83 | b | 41.83 | d | 48.83 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.73 | i |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.96 | 34.36 | 41.53 | 49.10 | 58.14 | 68.01 | 72.89 | 70.42 | 63.40 | 51.68 | 39.09 | 30.12 | 50.74 | |||||||||||||
S.D. | 4.03 | 3.41 | 3.07 | 2.81 | 2.54 | 2.35 | 1.51 | 1.70 | 2.18 | 2.33 | 2.76 | 3.24 | 1.26 | |||||||||||||
SKEW | -0.10 | -0.65 | -0.29 | -0.36 | 0.14 | 0.09 | -0.03 | 0.01 | -0.13 | -0.28 | -0.17 | -0.18 | -0.12 | |||||||||||||
MAX | 36.65 | 40.96 | 46.93 | 54.86 | 63.15 | 72.68 | 76.87 | 73.95 | 67.97 | 56.53 | 47.11 | 36.82 | 53.62 | |||||||||||||
MIN | 20.29 | 22.64 | 34.85 | 42.16 | 53.48 | 63.05 | 69.98 | 66.11 | 58.58 | 45.69 | 31.93 | 23.53 | 47.61 | |||||||||||||
YRS | 58 | 61 | 61 | 61 | 59 | 58 | 62 | 60 | 60 | 59 | 58 | 59 | 47 |