YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1961 | ----- | z | ----- | z | ----- | z | ----- | z | 57.64 | x | 58.42 | 62.74 | 61.61 | 49.32 | b | 44.33 | a | 31.60 | a | 23.57 | a | 47.37 | e | |||
1962 | 20.68 | 29.38 | b | 31.33 | b | 45.28 | 52.20 | a | 58.05 | 64.98 | ----- | z | ----- | z | 48.13 | 38.13 | 31.77 | 41.99 | b | |||||||
1963 | 21.13 | a | 33.84 | 32.77 | 42.75 | 53.26 | 59.40 | 65.74 | 62.73 | a | 59.78 | 50.50 | 38.60 | a | 28.37 | 45.74 | ||||||||||
1964 | 26.06 | 23.38 | 28.18 | 40.23 | 50.15 | 56.30 | 65.84 | 60.68 | 54.67 | 46.21 | 35.13 | c | 30.11 | 43.08 | ||||||||||||
1965 | 31.97 | a | 28.84 | 23.79 | 43.13 | 49.10 | 56.37 | 63.18 | 60.27 | 49.29 | a | 48.21 | 39.82 | 33.06 | 43.92 | |||||||||||
1966 | 27.03 | a | 23.54 | 37.20 | a | 41.25 | 51.90 | 58.15 | 67.31 | b | 61.77 | 56.58 | 45.53 | b | 38.20 | 28.44 | 44.74 | |||||||||
1967 | 30.50 | 29.64 | 38.18 | 40.93 | a | 46.39 | 54.33 | 62.85 | a | 59.48 | 54.38 | 46.50 | ----- | z | 23.15 | 44.21 | a | |||||||||
1968 | 27.42 | 29.91 | 33.92 | 36.77 | 46.47 | b | 57.91 | a | 61.19 | 59.85 | 52.50 | 45.77 | 30.57 | 26.95 | 42.44 | |||||||||||
1969 | 30.76 | 29.32 | 26.50 | 44.12 | 49.98 | 53.02 | 64.06 | 63.97 | 55.12 | 37.20 | a | 33.78 | 28.77 | 43.05 | ||||||||||||
1970 | 28.05 | 33.75 | 29.11 | 35.98 | 50.53 | a | 56.67 | 63.32 | a | 63.88 | a | 52.88 | 40.21 | 34.05 | 29.44 | 43.16 | ||||||||||
1971 | 28.55 | b | 26.66 | 32.74 | 40.87 | 46.34 | 58.52 | 61.69 | 62.31 | 52.08 | 43.88 | a | 34.58 | 26.76 | 42.92 | |||||||||||
1972 | 28.10 | 31.41 | a | ----- | z | ----- | z | ----- | z | 58.85 | 62.03 | a | 62.03 | ----- | z | 44.87 | 27.18 | 22.48 | 42.12 | d | ||||||
1973 | 22.63 | a | 26.88 | 30.92 | 34.52 | a | 46.61 | 57.62 | a | 61.11 | 62.98 | a | 52.45 | 45.37 | 34.79 | a | 26.82 | a | 41.89 | |||||||
1974 | 25.10 | a | 28.98 | a | 38.05 | a | 39.88 | 53.11 | 60.02 | 63.74 | 59.15 | 50.28 | 45.40 | a | 33.88 | 24.90 | 43.54 | |||||||||
1975 | 27.98 | b | 25.82 | 31.45 | 37.72 | 45.84 | 55.88 | a | 63.62 | b | 61.35 | 52.10 | 45.78 | a | 32.82 | 32.11 | 42.71 | |||||||||
1976 | 27.84 | 33.48 | 31.47 | 41.35 | 48.42 | 57.17 | 64.03 | 60.42 | 53.10 | 40.45 | 32.80 | 29.13 | 43.30 | |||||||||||||
1977 | 26.58 | 30.26 | a | 30.89 | 41.37 | 50.29 | 61.95 | 64.44 | 61.40 | 56.68 | 45.02 | 36.90 | a | ----- | z | 45.98 | a | |||||||||
1978 | 24.23 | 26.38 | 37.16 | 42.37 | 48.26 | 57.85 | 64.34 | 60.50 | 55.03 | 45.20 | a | 34.85 | 21.02 | 43.10 | ||||||||||||
1979 | 17.75 | a | 28.80 | a | 33.77 | ----- | z | 46.35 | 55.68 | 63.55 | ----- | z | 56.43 | a | 45.94 | 28.55 | b | 30.73 | a | 40.76 | b | |||||
1980 | 24.55 | a | 30.76 | b | 31.42 | 38.07 | 46.88 | b | 60.62 | b | 65.44 | 62.48 | 56.80 | 42.35 | a | 35.03 | a | 35.90 | 44.19 | |||||||
1981 | 30.55 | a | 31.21 | 32.43 | a | 46.14 | a | 47.76 | 60.80 | 64.38 | a | 61.19 | 56.77 | 44.61 | d | 38.03 | 28.87 | 45.23 | ||||||||
1982 | 27.16 | 26.71 | 35.63 | 40.63 | 46.73 | a | 54.16 | a | 61.66 | b | 63.69 | b | 53.42 | 41.08 | 30.58 | 28.58 | f | 43.77 | a | |||||||
1983 | 28.56 | e | 29.80 | 30.02 | c | 32.78 | 42.45 | 54.00 | 63.39 | 65.11 | 57.45 | 45.70 | a | 33.88 | d | 18.02 | 41.76 | |||||||||
1984 | 24.84 | 28.91 | 30.87 | 35.98 | ----- | z | 58.58 | d | 65.37 | 62.77 | ----- | z | 38.76 | b | 35.57 | 30.10 | b | 41.18 | b | |||||||
1985 | 23.06 | f | 24.64 | 34.78 | b | 44.22 | 50.64 | c | 59.39 | b | 63.66 | 62.44 | 52.77 | b | 44.61 | 31.09 | b | 28.65 | 45.17 | a | ||||||
1986 | 34.35 | a | 31.48 | d | 39.92 | 44.73 | d | 47.82 | a | 59.67 | 63.19 | b | 62.34 | 52.00 | b | 42.62 | a | 34.29 | b | 27.00 | b | 44.95 | ||||
1987 | 27.38 | b | 29.24 | a | 32.21 | c | 43.61 | b | 50.77 | c | 59.30 | c | 64.33 | b | 61.61 | c | 53.58 | 46.39 | c | 34.40 | a | 23.67 | d | 43.87 | ||
1988 | 22.81 | e | 30.13 | b | 32.52 | e | 43.38 | b | 49.14 | f | 61.38 | a | 63.60 | 63.98 | 53.02 | 48.05 | 35.60 | a | 25.97 | 43.68 | a | |||||
1989 | 27.67 | b | 20.95 | 39.65 | a | 43.47 | 50.60 | 56.18 | 64.32 | 61.05 | 54.26 | c | 43.71 | b | 37.43 | 25.31 | d | 43.72 | ||||||||
1990 | 29.04 | d | 27.59 | a | 34.68 | 42.63 | 48.18 | 60.97 | a | 61.35 | 60.69 | 57.58 | 45.61 | 37.67 | a | 21.84 | 43.99 | |||||||||
1991 | 24.56 | 31.85 | b | 36.18 | 40.53 | 50.89 | 59.88 | 62.50 | 61.73 | 54.45 | 45.56 | d | 32.39 | b | 29.92 | 44.20 | ||||||||||
1992 | 28.68 | 32.33 | b | 36.03 | b | 46.72 | 51.52 | b | 56.61 | b | 61.93 | a | 59.98 | b | 56.64 | a | 47.26 | 29.05 | a | 25.91 | b | 44.39 | ||||
1993 | 26.86 | c | 25.98 | b | 36.64 | b | 39.25 | d | 49.34 | c | 57.48 | a | 62.47 | 60.60 | a | 53.61 | b | 42.95 | b | 30.79 | a | 29.41 | b | 42.95 | ||
1994 | 29.64 | b | 27.90 | b | 37.07 | a | 41.15 | 53.65 | 62.52 | 64.05 | b | 64.50 | 55.96 | b | 42.89 | c | 33.40 | 31.56 | 45.36 | |||||||
1995 | 26.71 | 32.88 | 36.00 | 37.98 | b | 43.88 | b | 55.55 | 62.37 | 65.84 | 54.57 | a | 45.00 | 38.91 | c | 29.65 | a | 44.11 | ||||||||
1996 | 26.80 | f | 28.82 | a | 32.15 | a | 41.26 | a | 52.92 | 60.41 | a | 65.00 | 62.84 | 53.12 | 45.18 | a | 36.03 | a | 29.90 | b | 46.15 | a | ||||
1997 | 25.35 | 26.29 | 37.08 | 36.23 | 50.21 | 59.53 | a | 62.97 | 62.27 | 57.77 | 45.23 | 32.48 | 25.13 | d | 43.38 | |||||||||||
1998 | 30.95 | b | 29.14 | 33.05 | 38.42 | 51.81 | 56.50 | 65.90 | a | 63.25 | a | 59.28 | a | 45.68 | a | 37.11 | c | 24.80 | c | 44.66 | ||||||
1999 | 30.74 | 34.05 | 39.11 | 37.53 | 49.57 | a | 57.63 | 66.53 | a | 62.70 | a | 52.68 | b | 45.87 | d | 42.05 | a | 29.45 | 45.66 | |||||||
2000 | 29.78 | b | 34.50 | e | 36.04 | c | 44.29 | a | 53.50 | 60.06 | c | 67.23 | a | 65.33 | a | 56.16 | a | 42.76 | 26.84 | b | 25.43 | c | 45.16 | |||
2001 | 24.90 | f | 27.70 | a | 34.26 | 42.97 | 51.27 | a | 60.24 | a | 67.45 | 67.48 | 57.65 | 45.23 | a | 37.20 | b | 28.90 | a | 47.30 | a | |||||
2002 | 27.48 | b | 26.66 | 30.67 | a | 43.53 | a | 48.79 | 61.26 | a | 67.72 | b | 62.97 | a | 55.64 | a | 39.95 | 32.93 | 30.40 | a | 44.00 | |||||
2003 | 32.90 | a | 25.04 | d | 35.12 | a | 44.02 | 50.45 | a | 56.35 | 68.02 | 65.60 | a | 53.76 | a | 49.13 | 33.93 | b | 31.05 | 45.45 | ||||||
2004 | 30.66 | c | 25.40 | 42.45 | b | 42.88 | a | 51.38 | b | 56.62 | 62.13 | a | 59.98 | 54.79 | a | 46.23 | a | 34.64 | a | 31.42 | a | 44.88 | ||||
2005 | 33.71 | b | 31.50 | a | 34.73 | 40.28 | 49.76 | 58.36 | a | 67.19 | 61.68 | 57.12 | 45.73 | 38.37 | 27.45 | b | 45.49 | |||||||||
2006 | 33.40 | a | 27.50 | 33.23 | 45.98 | a | 52.10 | 61.90 | 66.10 | 63.66 | 51.58 | 44.56 | 36.40 | 28.77 | 45.43 | |||||||||||
2007 | 20.87 | a | 31.09 | 38.87 | 39.67 | 50.07 | a | 58.73 | 66.58 | 65.56 | d | 57.40 | 47.15 | 36.73 | 24.02 | 44.73 | ||||||||||
2008 | 22.11 | 29.26 | 32.77 | 39.42 | 48.15 | 58.47 | 66.50 | 62.69 | 53.35 | 45.39 | 39.08 | 27.15 | 43.69 | |||||||||||||
2009 | 29.90 | 32.59 | 37.44 | 38.40 | d | 51.35 | 56.53 | 62.47 | 61.37 | 54.58 | 37.68 | 37.73 | 21.19 | 43.44 | ||||||||||||
2010 | 26.87 | a | 22.93 | 33.85 | 41.68 | 46.90 | a | 59.72 | 65.39 | 64.24 | 57.65 | 47.18 | 34.37 | 33.03 | 44.48 | |||||||||||
2011 | 27.26 | 23.00 | 38.08 | 42.22 | 45.63 | 59.03 | 66.42 | 65.79 | 54.73 | 45.53 | 35.17 | 24.81 | 43.97 | |||||||||||||
2012 | 31.21 | 25.67 | 40.61 | 46.25 | 51.05 | 63.63 | 67.06 | 64.29 | 56.72 | 44.60 | 38.68 | 28.18 | 46.50 | |||||||||||||
2013 | 25.39 | 24.82 | 32.48 | 36.00 | 48.95 | 60.40 | 64.69 | 63.90 | 58.15 | 41.81 | 36.63 | 26.60 | 43.32 | |||||||||||||
2014 | 30.62 | a | 28.52 | 34.68 | 41.17 | 48.61 | 58.17 | 64.16 | 60.74 | 56.72 | 47.89 | 33.64 | a | 29.05 | 44.50 | |||||||||||
2015 | 30.71 | 30.07 | 38.38 | a | 41.53 | 45.82 | 60.82 | 62.77 | 63.71 | 59.10 | 49.69 | 34.53 | 26.74 | 45.32 | ||||||||||||
2016 | 29.02 | 34.41 | a | 35.20 | a | 40.74 | a | 46.85 | 63.16 | a | 65.48 | 61.37 | a | 56.57 | 49.24 | 40.25 | 27.06 | 45.78 | ||||||||
2017 | 26.16 | b | 36.17 | a | 42.23 | 41.25 | 47.85 | 60.22 | 64.97 | 60.64 | b | 55.43 | 43.94 | 41.33 | 33.15 | 46.11 | ||||||||||
2018 | 31.94 | 28.14 | 36.74 | 42.26 | a | 52.34 | 62.03 | 65.31 | b | 63.04 | c | 58.47 | 43.23 | 34.00 | 28.66 | 45.51 | ||||||||||
2019 | 27.53 | 27.07 | 31.42 | 42.53 | 44.55 | 57.18 | 65.66 | 64.95 | 60.05 | 40.27 | 35.30 | 30.31 | 43.90 | |||||||||||||
2020 | 31.37 | a | 25.14 | a | 37.65 | 38.88 | 51.71 | 60.78 | 65.52 | 65.60 | a | 55.15 | 44.44 | 37.47 | 28.37 | 45.17 | ||||||||||
2021 | 29.34 | 25.41 | 32.06 | 37.93 | 48.47 | 60.75 | 65.28 | a | 63.65 | 58.93 | 47.31 | 40.43 | 34.61 | 45.35 | ||||||||||||
2022 | 26.69 | 23.48 | 32.66 | 41.43 | 49.02 | 59.62 | 65.61 | 63.90 | 58.45 | 45.92 | 31.38 | 27.61 | 43.82 | |||||||||||||
2023 | 24.18 | 27.16 | 28.52 | 39.32 | 50.27 | 55.78 | 65.03 | 63.58 | 57.15 | 45.77 | 36.90 | 31.71 | 43.78 | |||||||||||||
2024 | 24.50 | 32.48 | 33.64 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.21 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.61 | 28.68 | 34.33 | 40.96 | 49.25 | 58.62 | 64.43 | 62.64 | 55.23 | 44.83 | 35.10 | 27.94 | 44.23 | |||||||||||||
S.D. | 3.46 | 3.35 | 3.69 | 3.03 | 2.54 | 2.33 | 1.79 | 1.85 | 2.55 | 2.73 | 3.30 | 3.47 | 1.10 | |||||||||||||
SKEW | -0.45 | 0.02 | -0.14 | -0.37 | -0.37 | -0.15 | 0.05 | 0.28 | -0.24 | -0.70 | -0.31 | -0.36 | -0.11 | |||||||||||||
MAX | 34.35 | 36.17 | 42.45 | 46.72 | 53.65 | 63.63 | 68.02 | 67.48 | 60.05 | 50.50 | 42.05 | 35.90 | 46.50 | |||||||||||||
MIN | 17.75 | 20.95 | 23.79 | 32.78 | 42.45 | 53.02 | 61.11 | 59.15 | 49.29 | 37.20 | 26.84 | 18.02 | 41.76 | |||||||||||||
YRS | 60 | 63 | 62 | 60 | 59 | 63 | 63 | 61 | 60 | 63 | 62 | 61 | 51 |