YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.39 | b | 51.45 | 46.00 | 41.32 | 50.04 | h | |||
1960 | 33.84 | 29.59 | 42.45 | 51.03 | 57.39 | 69.47 | 70.23 | 74.39 | 65.83 | 53.58 | 45.83 | a | 37.45 | 52.59 | ||||||||||||
1961 | 40.26 | 38.89 | 40.06 | 46.67 | 58.26 | 65.83 | a | 69.19 | 67.94 | 59.64 | b | 55.07 | a | 41.50 | 32.87 | 51.35 | ||||||||||
1962 | 35.77 | a | 40.11 | 37.61 | 50.93 | 61.40 | a | 63.73 | 70.10 | 72.84 | 65.03 | 58.35 | 46.87 | 41.10 | 53.65 | |||||||||||
1963 | 32.32 | 40.07 | 41.32 | 51.90 | 62.19 | 69.43 | 74.20 | a | 67.55 | 64.77 | 59.13 | ----- | z | 37.16 | 54.55 | a | ||||||||||
1964 | 34.68 | 29.93 | 36.77 | 46.83 | 58.81 | 69.63 | 75.10 | 70.03 | 63.50 | 56.10 | 41.77 | 35.87 | 51.58 | |||||||||||||
1965 | 36.71 | 36.75 | 34.43 | a | 50.90 | 60.69 | b | 63.52 | a | 67.52 | b | 63.52 | 54.83 | a | 52.77 | 43.23 | 39.68 | 50.38 | ||||||||
1966 | 32.19 | 31.04 | 44.45 | 48.87 | 61.80 | a | 68.83 | a | 74.74 | 67.45 | 64.20 | 53.97 | 44.73 | 36.23 | 52.37 | |||||||||||
1967 | 38.45 | 37.54 | 46.84 | 49.25 | b | 55.84 | 64.00 | 69.74 | 67.39 | 64.50 | 57.17 | a | 44.67 | 32.53 | a | 52.33 | ||||||||||
1968 | 32.65 | 33.00 | 36.81 | 39.80 | 53.19 | 70.97 | 70.32 | 66.67 | a | 64.23 | 55.55 | 37.53 | 33.00 | 49.48 | ||||||||||||
1969 | 37.74 | 35.25 | 30.27 | a | 49.93 | 59.16 | 60.07 | a | 71.68 | 71.55 | 61.67 | 42.48 | 38.47 | 33.61 | 49.32 | |||||||||||
1970 | 28.84 | 33.39 | 28.87 | 38.47 | 58.65 | 64.83 | 70.87 | 70.30 | a | 61.83 | 45.29 | 36.70 | 31.32 | 47.45 | ||||||||||||
1971 | 31.26 | 28.11 | 36.58 | 43.93 | 54.42 | 69.50 | 69.57 | a | 68.06 | 60.90 | 50.87 | a | 37.20 | 29.00 | 48.28 | |||||||||||
1972 | 31.50 | a | 34.17 | 41.90 | 47.21 | b | 55.53 | a | 67.24 | a | 68.87 | 66.84 | 61.70 | 50.58 | 29.63 | 29.77 | 48.75 | |||||||||
1973 | 28.20 | a | 30.18 | 30.39 | 36.59 | a | 52.00 | a | 66.53 | 68.57 | a | 71.40 | a | 60.83 | 52.61 | 38.73 | 31.70 | a | 47.31 | |||||||
1974 | 29.97 | a | 32.77 | b | 41.30 | a | 43.23 | 62.58 | 67.87 | 71.03 | 67.87 | a | 60.86 | a | 52.27 | a | 39.73 | 30.67 | a | 50.01 | ||||||
1975 | 35.50 | a | 33.82 | 39.45 | 46.13 | 53.55 | 65.20 | 69.55 | 69.07 | a | 60.52 | a | 55.87 | 39.50 | 34.03 | 50.18 | ||||||||||
1976 | 30.68 | 37.21 | 38.27 | a | 47.86 | a | 54.47 | a | 66.93 | a | 72.81 | 70.55 | 61.20 | 51.29 | 40.07 | a | 36.77 | 50.67 | ||||||||
1977 | 33.19 | 38.14 | 39.48 | 48.93 | 61.03 | a | 72.07 | a | 74.52 | 70.16 | 67.63 | 55.65 | 42.27 | 38.35 | 53.45 | |||||||||||
1978 | 32.90 | 34.71 | 44.77 | 50.13 | 54.84 | 67.83 | 75.90 | b | 68.97 | a | 65.54 | b | 53.85 | d | 42.13 | 30.77 | 51.86 | |||||||||
1979 | 27.13 | 36.79 | 39.55 | 47.40 | 51.86 | j | 65.80 | 71.81 | d | 69.54 | c | 66.00 | c | 55.23 | 33.27 | 38.10 | 50.05 | a | ||||||||
1980 | 35.74 | 38.55 | 36.94 | 43.47 | 50.42 | ----- | z | 75.38 | b | 71.93 | a | ----- | z | 53.77 | 43.59 | a | 46.19 | 49.60 | b | |||||||
1981 | 37.19 | 40.32 | 39.68 | 55.20 | 54.27 | a | 71.57 | 71.71 | c | 66.33 | a | 64.03 | a | 51.97 | a | 45.13 | 37.71 | 52.93 | ||||||||
1982 | 36.11 | d | 33.71 | 40.07 | a | 48.26 | c | 54.57 | a | 62.37 | 63.41 | b | 70.10 | 60.90 | 50.93 | b | 40.79 | a | 37.73 | e | 49.91 | |||||
1983 | 37.81 | 35.74 | a | 36.64 | c | 41.11 | b | 51.55 | b | 64.41 | a | 73.00 | 70.97 | 67.72 | a | 55.12 | f | 41.13 | 31.10 | 50.11 | a | |||||
1984 | 32.52 | 35.41 | 35.35 | 41.47 | 59.39 | 66.43 | 71.81 | 67.79 | b | 63.80 | 43.55 | 42.00 | 36.58 | 49.68 | ||||||||||||
1985 | 28.77 | 29.96 | 39.13 | 48.90 | 57.42 | 66.60 | 71.03 | 71.35 | 60.33 | 52.29 | 39.20 | 34.74 | 49.98 | |||||||||||||
1986 | 42.26 | 37.68 | 46.35 | 50.20 | 56.48 | 67.60 | 72.26 | 70.00 | 63.83 | a | 49.87 | 40.23 | 32.06 | 52.40 | ||||||||||||
1987 | 32.61 | 33.46 | 36.42 | 48.73 | 56.16 | 67.67 | 73.00 | 68.00 | 63.33 | 55.16 | 41.07 | 31.84 | 50.62 | |||||||||||||
1988 | 31.65 | 37.03 | 37.13 | 48.80 | 57.58 | 69.59 | a | 72.19 | 70.39 | 62.67 | 60.74 | 40.90 | 37.10 | 52.15 | ||||||||||||
1989 | 34.26 | 30.46 | 46.23 | 49.27 | 56.74 | 59.57 | 70.45 | 66.65 | 61.93 | 51.83 | a | 43.93 | 33.81 | 50.43 | ||||||||||||
1990 | 34.00 | 33.64 | 39.61 | 48.03 | 53.71 | 72.90 | 68.23 | 67.00 | 65.13 | 53.52 | 44.50 | 29.42 | 50.81 | |||||||||||||
1991 | 31.61 | 40.46 | 39.06 | 46.87 | 58.23 | 66.93 | 68.87 | 70.84 | 62.33 | 58.74 | 37.24 | a | 34.16 | 51.28 | ||||||||||||
1992 | 35.19 | 37.72 | 41.65 | 52.60 | 58.68 | 62.70 | 68.74 | 67.35 | 65.63 | 57.94 | 36.73 | 34.26 | 51.60 | |||||||||||||
1993 | 34.30 | a | 32.50 | 35.93 | a | 39.03 | a | 48.90 | 60.10 | 67.39 | 61.90 | a | 57.55 | a | 47.17 | b | 33.59 | c | 31.40 | a | 45.81 | |||||
1994 | 28.13 | a | 29.48 | a | 37.30 | a | 39.24 | a | 51.06 | 65.43 | 65.45 | 64.35 | 58.50 | 44.50 | a | 35.50 | d | 34.25 | c | 46.10 | ||||||
1995 | 28.67 | a | 36.57 | 34.71 | 36.64 | b | 43.03 | a | 57.70 | 67.52 | 68.74 | 56.55 | a | 49.62 | b | 42.52 | a | 32.06 | 46.19 | |||||||
1996 | 29.03 | b | 35.33 | b | 34.00 | 40.13 | 57.23 | 62.43 | 65.61 | 63.77 | 55.17 | a | 47.66 | b | 36.73 | d | 24.33 | d | 45.95 | |||||||
1997 | 28.45 | b | 29.67 | d | 38.19 | e | 41.35 | g | 50.97 | b | 60.54 | b | 73.07 | b | 69.81 | 64.23 | 53.63 | a | 39.80 | e | 34.81 | 49.38 | a | |||
1998 | 32.32 | 31.08 | c | 39.31 | b | 46.43 | b | 63.77 | 68.73 | 71.71 | 69.61 | 70.03 | 55.33 | a | 44.90 | 39.86 | b | 52.76 | ||||||||
1999 | 40.81 | 45.04 | 48.84 | 44.55 | a | 56.84 | 66.72 | a | 70.41 | b | 66.35 | 59.32 | b | 58.30 | a | 54.25 | b | 40.93 | d | 54.36 | ||||||
2000 | ----- | z | 46.54 | c | 45.68 | c | 55.33 | 65.58 | 71.04 | b | 75.26 | 73.97 | 68.37 | 51.71 | 38.11 | b | 40.42 | 57.45 | a | |||||||
2001 | 37.39 | c | 42.79 | 45.14 | b | 52.63 | 62.38 | b | 70.80 | 74.84 | 70.39 | 68.62 | a | 55.97 | a | 48.10 | 38.57 | a | 55.63 | |||||||
2002 | 37.67 | a | ----- | z | 40.68 | 55.80 | 60.17 | a | 72.70 | 75.50 | a | 71.60 | a | 62.07 | 50.77 | 43.67 | 35.42 | 55.09 | a | |||||||
2003 | 44.61 | 33.29 | 43.77 | 52.81 | c | 58.65 | 63.41 | a | 78.03 | 71.03 | a | 61.10 | 56.72 | b | 45.32 | b | 42.93 | b | 54.31 | |||||||
2004 | 36.50 | a | 33.79 | 49.48 | 47.11 | c | 62.23 | 67.10 | a | 68.61 | 66.33 | a | 63.52 | a | 52.20 | a | 41.21 | a | 41.54 | c | 52.47 | |||||
2005 | 40.33 | d | 39.46 | b | 42.50 | a | 50.81 | c | 59.76 | b | 65.34 | a | 75.61 | 68.13 | 66.23 | 55.13 | 47.24 | a | 35.72 | b | 53.86 | |||||
2006 | 40.77 | a | 38.88 | b | 42.80 | a | 55.68 | b | 61.16 | 72.23 | 71.48 | 66.19 | 55.83 | 53.76 | b | 46.17 | 39.77 | a | 53.73 | |||||||
2007 | 32.97 | a | 40.04 | 45.65 | 48.62 | a | 55.10 | 67.79 | b | 71.61 | 71.77 | 65.93 | 56.03 | a | 50.33 | 35.13 | a | 53.41 | ||||||||
2008 | 34.29 | 39.82 | a | 41.87 | a | 46.13 | 55.48 | 68.17 | 74.48 | 72.29 | 63.90 | 55.42 | 47.03 | 36.77 | 52.97 | |||||||||||
2009 | 41.58 | 42.04 | 46.53 | a | 49.77 | 61.84 | 67.43 | 73.00 | 70.65 | 57.95 | k | 48.81 | 48.33 | 34.13 | 53.10 | a | ||||||||||
2010 | 40.65 | 31.68 | 43.39 | 48.55 | a | 58.71 | 69.77 | 72.10 | 71.13 | 69.30 | 56.29 | 44.37 | 42.10 | 54.00 | ||||||||||||
2011 | 37.81 | 37.57 | 46.32 | 51.63 | 56.29 | 73.20 | 75.06 | 75.19 | 63.67 | 55.00 | 46.80 | 36.90 | 54.62 | |||||||||||||
2012 | 43.03 | 36.52 | 50.58 | 57.50 | 62.71 | 76.73 | 75.39 | 72.77 | 63.83 | 54.48 | 52.47 | 39.48 | 57.13 | |||||||||||||
2013 | 37.87 | 36.32 | 44.58 | 48.07 | 60.39 | 75.90 | 72.52 | 68.32 | 63.13 | 51.23 | a | 42.17 | 34.94 | 52.95 | ||||||||||||
2014 | 38.13 | 37.54 | 41.81 | 47.17 | 55.77 | 71.80 | 72.10 | 69.23 | 68.60 | 60.03 | a | 45.00 | 39.61 | 53.90 | ||||||||||||
2015 | 42.87 | 42.39 | 49.03 | 50.70 | 54.87 | 71.68 | k | 70.10 | 72.77 | 70.30 | 58.68 | 46.60 | 38.84 | 54.29 | a | |||||||||||
2016 | 37.29 | 43.28 | 47.30 | a | 49.60 | 56.29 | 72.07 | 75.03 | 67.71 | 66.77 | 60.71 | 50.43 | 40.03 | 55.54 | ||||||||||||
2017 | 36.94 | 45.04 | 51.81 | 50.90 | 56.26 | 70.33 | 71.06 | 67.26 | 63.37 | 56.16 | 54.30 | 44.13 | 55.63 | |||||||||||||
2018 | 42.26 | 40.86 | 45.77 | 50.87 | 63.52 | 73.27 | 73.19 | 69.71 | 67.97 | 51.94 | 40.10 | 37.26 | 54.73 | |||||||||||||
2019 | 37.06 | 36.79 | 39.71 | 49.30 | 50.90 | 65.43 | 72.45 | 73.84 | 70.30 | 45.39 | 42.37 | 35.06 | 51.55 | |||||||||||||
2020 | 34.81 | 29.79 | 42.55 | 45.67 | 59.42 | 68.23 | 72.26 | 73.81 | 62.45 | a | 57.16 | 45.83 | a | 34.97 | 52.24 | |||||||||||
2021 | 33.90 | 34.32 | 36.74 | 44.17 | 53.65 | 68.20 | 69.61 | 70.29 | 65.10 | 51.00 | 47.59 | a | 40.90 | 51.29 | ||||||||||||
2022 | 34.97 | 30.82 | 38.03 | 47.17 | 54.55 | 65.77 | 70.35 | 66.58 | 65.07 | 50.61 | 37.90 | 34.03 | b | 49.65 | ||||||||||||
2023 | 30.45 | 35.07 | 35.19 | 43.57 | 54.97 | 60.67 | 69.77 | 67.94 | 63.10 | 51.84 | 41.30 | 36.68 | 49.21 | |||||||||||||
2024 | 30.87 | 35.89 | a | 37.11 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.62 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 35.00 | 36.03 | 40.74 | 47.69 | 57.04 | 67.37 | 71.52 | 69.28 | 63.46 | 53.32 | 42.60 | 36.02 | 51.51 | |||||||||||||
S.D. | 4.28 | 4.32 | 4.95 | 4.66 | 4.14 | 4.04 | 2.85 | 2.73 | 3.55 | 4.07 | 4.85 | 4.07 | 2.63 | |||||||||||||
SKEW | 0.21 | 0.28 | 0.02 | -0.47 | -0.51 | -0.13 | -0.28 | -0.18 | -0.26 | -0.56 | 0.08 | -0.05 | -0.34 | |||||||||||||
MAX | 44.61 | 46.54 | 51.81 | 57.50 | 65.58 | 76.73 | 78.03 | 75.19 | 70.30 | 60.74 | 54.30 | 46.19 | 57.13 | |||||||||||||
MIN | 27.13 | 28.11 | 28.87 | 36.59 | 43.03 | 57.70 | 63.41 | 61.90 | 54.83 | 42.48 | 29.63 | 24.33 | 45.81 | |||||||||||||
YRS | 64 | 64 | 65 | 63 | 63 | 62 | 64 | 64 | 63 | 64 | 64 | 65 | 55 |