YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.85 | e | 19.85 | k |
1968 | 18.53 | 29.72 | 42.13 | 42.88 | a | 52.12 | a | 62.78 | 71.89 | 64.21 | 55.72 | a | 44.84 | 32.80 | 21.82 | 44.95 | ||||||||||
1969 | 24.75 | a | 25.90 | b | 32.97 | a | 49.52 | 58.05 | 60.75 | 68.44 | 70.03 | b | 58.13 | 40.24 | 32.33 | a | 25.66 | 45.56 | ||||||||
1970 | 26.26 | b | 34.48 | 35.43 | a | 40.27 | 52.79 | b | 63.73 | 69.60 | 70.26 | 52.35 | 41.42 | 34.08 | 20.30 | c | 45.08 | |||||||||
1971 | 22.37 | 29.80 | 34.66 | 43.78 | a | 53.89 | 59.79 | b | 68.26 | 70.76 | 53.73 | 43.97 | 34.00 | a | 16.74 | 44.31 | ||||||||||
1972 | 19.45 | 24.78 | 40.31 | 43.60 | 54.10 | 63.85 | 67.53 | 69.31 | 54.67 | a | 45.42 | a | 32.66 | a | 17.58 | 44.44 | ||||||||||
1973 | 18.08 | a | 29.11 | a | 37.77 | a | 44.82 | 56.33 | b | 63.17 | 71.98 | 68.90 | a | 57.50 | 47.98 | 35.12 | 29.53 | 46.69 | ||||||||
1974 | 19.55 | 33.64 | 37.65 | a | 47.35 | 51.45 | 67.35 | 71.15 | 65.71 | 59.50 | 46.90 | a | 36.29 | a | 24.47 | 46.75 | ||||||||||
1975 | 19.68 | 22.73 | 33.87 | a | 40.67 | 51.37 | 59.12 | 71.93 | a | 64.87 | 58.20 | 46.77 | a | 30.88 | 28.22 | a | 44.03 | |||||||||
1976 | 20.37 | 23.67 | 31.87 | 45.70 | 56.69 | 60.52 | 70.74 | 64.08 | 59.28 | 44.20 | a | 35.41 | a | 22.33 | a | 44.57 | ||||||||||
1977 | 12.26 | 28.86 | 36.26 | 49.80 | 52.74 | 66.23 | 68.02 | 66.47 | 57.37 | 45.85 | 30.63 | 26.24 | 45.06 | |||||||||||||
1978 | 25.77 | 30.88 | 40.81 | 47.62 | 51.50 | 61.72 | 68.58 | 65.72 | a | 57.87 | 47.11 | 28.27 | 14.26 | 45.01 | ||||||||||||
1979 | 2.81 | 28.16 | 38.21 | 45.63 | 54.98 | 62.79 | a | 69.81 | 67.45 | 63.17 | 48.73 | 28.10 | 31.18 | a | 45.09 | |||||||||||
1980 | 20.22 | a | 29.07 | 37.85 | 49.08 | 55.38 | a | 60.83 | 69.05 | 66.19 | 58.97 | 46.61 | 34.07 | a | 30.52 | a | 46.49 | |||||||||
1981 | 28.45 | b | 32.27 | 41.08 | 47.75 | 54.21 | 61.07 | 69.97 | 71.89 | 60.35 | 45.06 | 35.31 | a | 25.85 | a | 47.77 | ||||||||||
1982 | 19.98 | e | 24.80 | c | 39.93 | a | 41.83 | 52.69 | 61.83 | 68.15 | 70.18 | 57.83 | 44.43 | a | 30.35 | 22.82 | 44.57 | |||||||||
1983 | 28.58 | a | 33.46 | b | 41.43 | b | 43.50 | 54.28 | a | 62.22 | a | 67.55 | 69.90 | 57.50 | 47.47 | 36.47 | 13.67 | a | 46.34 | |||||||
1984 | 15.87 | a | 22.10 | 36.68 | 44.48 | 53.37 | 59.52 | 69.95 | 68.92 | 55.53 | 42.82 | 33.65 | 15.39 | 43.19 | ||||||||||||
1985 | 16.52 | 18.70 | a | 29.32 | 49.80 | 56.77 | 64.77 | 73.35 | 65.35 | 54.03 | 44.65 | 25.60 | 12.68 | 42.63 | ||||||||||||
1986 | 19.05 | 30.88 | 43.61 | 47.83 | 56.50 | 66.42 | 66.87 | 69.95 | 53.67 | 46.02 | a | 34.37 | 21.39 | 46.38 | ||||||||||||
1987 | 21.63 | 32.86 | 41.39 | 53.43 | 58.32 | 64.12 | 66.68 | 64.47 | 60.52 | 47.79 | 35.52 | 25.79 | 47.71 | |||||||||||||
1988 | 21.16 | 32.71 | 39.53 | b | 50.47 | 56.16 | 68.48 | 72.61 | 67.61 | 57.75 | 52.44 | 33.02 | 17.65 | 47.47 | ||||||||||||
1989 | 21.68 | 17.21 | 39.77 | 49.58 | 54.03 | 63.75 | 72.08 | 66.03 | 58.07 | 47.47 | 35.68 | 24.74 | 45.84 | |||||||||||||
1990 | 30.15 | 30.73 | 40.48 | 51.57 | 52.95 | 61.60 | 70.05 | a | 66.39 | 63.35 | 45.69 | 35.47 | a | 16.57 | d | 47.08 | ||||||||||
1991 | 15.21 | 33.48 | 40.00 | 44.97 | 52.52 | 59.57 | 70.84 | 71.18 | 60.58 | 46.82 | 30.60 | a | 20.05 | a | 45.48 | |||||||||||
1992 | 21.71 | 31.88 | 45.21 | 50.71 | b | 60.32 | 65.28 | 65.60 | 68.48 | a | 56.98 | 48.15 | 29.47 | 17.58 | 46.78 | |||||||||||
1993 | 14.78 | a | 20.12 | 40.06 | 46.15 | 59.79 | 59.57 | 60.89 | 62.73 | 57.90 | 46.92 | 28.10 | 24.18 | 43.43 | ||||||||||||
1994 | 26.18 | 26.20 | 40.15 | 49.98 | 58.56 | 63.17 | 68.93 | a | 69.45 | 61.22 | 46.73 | 30.03 | a | 23.17 | a | 46.98 | ||||||||||
1995 | 22.80 | a | 34.69 | a | 38.84 | 45.91 | a | 53.79 | 59.43 | 68.06 | 67.61 | 59.33 | 44.68 | 36.17 | 27.66 | 46.58 | ||||||||||
1996 | 21.48 | 25.86 | 37.85 | 47.43 | 52.13 | 64.30 | 72.15 | 68.85 | 58.00 | a | 47.88 | b | 35.05 | 26.39 | 46.45 | |||||||||||
1997 | 24.42 | 28.70 | 41.05 | a | 45.17 | 57.71 | 63.08 | 68.87 | 68.34 | 61.98 | a | 45.81 | 33.81 | a | 17.63 | a | 46.38 | |||||||||
1998 | 24.74 | b | 27.45 | 38.05 | 47.52 | 55.95 | a | 57.58 | f | 72.07 | c | 69.12 | b | 62.43 | c | 43.98 | h | 39.31 | a | 23.20 | a | 45.98 | b | |||
1999 | 28.96 | c | 30.00 | a | 38.81 | b | 45.46 | d | 53.70 | a | 60.40 | a | 68.60 | 69.32 | 57.57 | a | 48.88 | a | 38.54 | b | 22.96 | c | 46.93 | |||
2000 | 22.42 | a | 31.34 | a | 40.89 | 51.75 | 56.05 | a | 63.81 | a | 70.38 | c | 67.94 | d | 58.58 | e | 44.48 | h | 21.66 | k | 16.11 | l | 51.46 | c | ||
2001 | 13.30 | k | 18.94 | j | 36.71 | j | 42.50 | n | 52.76 | n | 62.03 | n | 67.69 | j | 69.40 | k | 60.70 | j | 46.40 | a | 36.20 | j | 17.55 | i | 46.40 | k |
2002 | 20.63 | p | 25.08 | c | 36.40 | b | 44.93 | 53.58 | 61.93 | 71.92 | a | 63.89 | 57.73 | b | 42.09 | c | 31.86 | b | 28.05 | b | 47.04 | a | ||||
2003 | 28.79 | 27.21 | b | 40.19 | b | 44.96 | b | 53.39 | c | 63.47 | 73.08 | 70.24 | b | 58.88 | b | 49.79 | c | 28.59 | c | 27.96 | d | 47.21 | ||||
2004 | 19.67 | g | 24.94 | e | 43.56 | e | 48.38 | 52.67 | b | 59.98 | j | 67.63 | a | 65.47 | 54.83 | a | 45.58 | a | 31.30 | 26.47 | 46.08 | b | ||||
2005 | 17.56 | g | 26.09 | a | 39.00 | a | 46.46 | b | 53.06 | g | 57.33 | g | 70.55 | i | 67.30 | a | 54.95 | i | 46.34 | b | 28.61 | b | 16.12 | g | 42.30 | f |
2006 | 25.97 | b | 23.36 | 36.56 | 46.66 | e | 56.07 | b | 64.17 | a | 73.40 | a | 65.57 | a | 55.12 | 43.52 | 33.87 | 23.32 | 45.63 | |||||||
2007 | 19.11 | 29.90 | b | 40.84 | b | 46.94 | c | 55.77 | a | 63.16 | a | 73.40 | a | 66.06 | 55.69 | c | 42.90 | a | 31.93 | 22.13 | 45.65 | |||||
2008 | 15.28 | m | 27.29 | c | 34.08 | 39.97 | 52.63 | 59.32 | 69.29 | 67.13 | 54.92 | 43.24 | 35.63 | 20.71 | 45.84 | a | ||||||||||
2009 | 21.23 | 26.27 | 33.42 | 44.38 | 54.11 | 59.97 | 67.84 | 65.79 | 60.98 | 40.58 | 32.20 | 17.50 | 43.69 | |||||||||||||
2010 | 23.31 | 27.30 | 38.23 | 44.42 | 47.98 | 57.90 | 66.71 | 64.86 | b | 55.88 | 47.13 | 32.22 | a | 19.42 | 43.78 | |||||||||||
2011 | 16.69 | 21.32 | 36.45 | 41.20 | 51.15 | 57.57 | 67.90 | 66.98 | 59.13 | 45.58 | 30.05 | 20.60 | 42.89 | |||||||||||||
2012 | 25.89 | 28.66 | 39.52 | 47.60 | 52.19 | 60.93 | 70.32 | 66.37 | 56.98 | 43.71 | 34.67 | 23.94 | 45.90 | |||||||||||||
2013 | 12.26 | 26.23 | 35.61 | 43.62 | 54.63 | 61.60 | 71.31 | 67.98 | 58.67 | 41.10 | 30.93 | 15.60 | 43.29 | |||||||||||||
2014 | 24.24 | 21.86 | 35.60 | 43.90 | 54.13 | 59.38 | 70.37 | 64.55 | 57.40 | 48.29 | 28.50 | 25.97 | 44.52 | |||||||||||||
2015 | 21.42 | 33.16 | 41.31 | 44.83 | 53.94 | 66.45 | 66.90 | 65.24 | 57.37 | 49.29 | 26.83 | 20.88 | a | 45.64 | ||||||||||||
2016 | 16.94 | e | 25.81 | 38.69 | 49.98 | 53.48 | 64.70 | 67.24 | 65.13 | 54.83 | 46.94 | 36.73 | 12.62 | a | 44.43 | |||||||||||
2017 | 4.61 | d | 27.48 | 42.40 | 43.18 | 53.81 | 61.33 | 70.39 | 66.97 | 55.17 | 41.58 | 33.71 | a | 22.16 | 43.57 | |||||||||||
2018 | 27.56 | 28.29 | 35.97 | 45.70 | 56.88 | b | 60.55 | 70.33 | a | 65.35 | 56.48 | 44.29 | 29.93 | 21.90 | 45.27 | |||||||||||
2019 | 21.05 | 23.89 | j | ----- | z | 45.83 | 52.60 | 61.85 | 69.15 | 68.50 | 59.05 | 36.23 | 30.40 | 22.02 | 46.67 | b | ||||||||||
2020 | 20.95 | 17.59 | 34.39 | 44.05 | 53.93 | b | 60.03 | a | 67.16 | 69.90 | 56.83 | 45.06 | 29.52 | 20.82 | 43.35 | |||||||||||
2021 | 19.19 | 23.61 | 34.03 | 42.48 | 50.87 | 67.85 | 73.18 | 65.92 | 57.27 | 47.34 | 35.22 | 28.56 | 45.46 | |||||||||||||
2022 | 12.52 | 21.50 | 38.15 | 35.28 | 49.73 | g | 55.79 | i | 71.13 | 71.10 | 59.83 | 47.02 | 23.22 | 17.97 | 39.77 | b | ||||||||||
2023 | 19.50 | 19.93 | 30.24 | 42.22 | 58.61 | 60.30 | 71.32 | 68.53 | 58.55 | 46.26 | 32.90 | 22.02 | 44.20 | |||||||||||||
2024 | 19.26 | 32.47 | 38.15 | 50.75 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.96 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.70 | 27.30 | 38.12 | 45.87 | 54.41 | 62.30 | 69.64 | 67.39 | 57.80 | 45.56 | 32.41 | 22.01 | 45.33 | |||||||||||||
S.D. | 5.54 | 4.48 | 3.32 | 3.40 | 2.45 | 2.57 | 2.38 | 2.22 | 2.43 | 2.76 | 3.28 | 4.61 | 1.38 | |||||||||||||
SKEW | -0.95 | -0.36 | -0.47 | -0.29 | 0.30 | 0.46 | -0.75 | 0.07 | 0.16 | -0.71 | -0.37 | -0.12 | -0.11 | |||||||||||||
MAX | 30.15 | 34.69 | 45.21 | 53.43 | 60.32 | 68.48 | 73.40 | 71.89 | 63.35 | 52.44 | 39.31 | 31.18 | 47.77 | |||||||||||||
MIN | 2.81 | 17.21 | 29.32 | 35.28 | 47.98 | 57.57 | 60.89 | 62.73 | 52.35 | 36.23 | 23.22 | 12.62 | 42.63 | |||||||||||||
YRS | 52 | 55 | 55 | 55 | 53 | 51 | 54 | 55 | 54 | 54 | 54 | 54 | 47 |