YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1971 | ----- | z | ----- | z | ----- | z | ----- | z | 54.04 | f | 69.86 | b | 65.92 | 65.23 | 60.07 | 52.31 | 32.18 | 16.88 | a | 51.78 | e | |||||
1972 | 6.35 | a | 12.52 | b | 23.94 | 40.43 | 60.56 | 63.73 | 67.34 | 67.23 | 56.52 | 42.89 | 31.30 | 11.48 | 40.36 | |||||||||||
1973 | 14.81 | 18.98 | a | 38.50 | 43.08 | 52.79 | 66.07 | 68.66 | 70.23 | 57.67 | 51.81 | 32.80 | 15.00 | 44.20 | ||||||||||||
1974 | 10.24 | 14.98 | a | 27.10 | 44.58 | 52.24 | 62.03 | 72.39 | 64.79 | 53.58 | 48.26 | 33.13 | 22.02 | 42.11 | ||||||||||||
1975 | 12.42 | 15.50 | a | 20.52 | 37.35 | 58.19 | 64.82 | 71.37 | 67.42 | 55.03 | 49.77 | 34.15 | 15.39 | 41.83 | ||||||||||||
1976 | 6.40 | 23.22 | 26.95 | 48.00 | 55.02 | 67.50 | 70.53 | 69.19 | 57.55 | 40.66 | 23.55 | 6.16 | 41.23 | |||||||||||||
1977 | -1.45 | 17.80 | 35.15 | 50.33 | a | 64.57 | a | 64.68 | 70.98 | 62.73 | 58.03 | 46.21 | 30.17 | 13.90 | a | 42.76 | ||||||||||
1978 | 5.39 | 9.64 | 26.35 | 42.05 | b | 58.66 | 63.38 | a | 67.15 | 67.27 | 62.65 | 46.82 | 28.05 | a | 10.73 | 40.68 | ||||||||||
1979 | -0.42 | 7.75 | 25.35 | 39.67 | 51.21 | 62.14 | a | 67.87 | 64.28 | a | 57.91 | h | 44.31 | j | 29.68 | 21.90 | 36.94 | b | ||||||||
1980 | 10.77 | a | 11.98 | b | 22.94 | 46.58 | 58.10 | b | 62.43 | a | 70.13 | 67.23 | 57.27 | 43.65 | 33.37 | 16.24 | 41.72 | |||||||||
1981 | 15.37 | a | 20.29 | 33.26 | 45.91 | a | 54.26 | 64.15 | 69.56 | 66.76 | 57.28 | 44.31 | 36.67 | 16.02 | 43.65 | |||||||||||
1982 | -0.75 | a | 12.31 | a | 25.18 | a | 39.64 | b | 60.67 | a | 59.20 | 71.11 | c | 67.48 | b | 57.78 | e | 48.52 | g | 26.86 | h | 22.96 | g | 43.63 | c | |
1983 | 17.24 | d | 23.98 | 32.13 | d | 40.25 | d | 52.35 | d | 63.44 | c | 72.77 | a | 71.39 | 60.30 | 47.58 | a | 33.09 | a | 2.16 | b | 43.06 | ||||
1984 | 12.00 | g | 26.19 | b | 24.98 | b | 46.67 | 54.15 | a | 66.67 | 68.56 | 70.77 | a | 54.90 | 50.22 | a | 31.44 | d | 18.33 | e | 46.62 | a | ||||
1985 | 9.84 | c | 14.45 | 34.33 | a | 49.10 | 60.23 | a | 60.46 | b | 67.74 | 63.66 | 57.80 | c | 46.35 | 23.34 | b | 6.73 | c | 41.17 | ||||||
1986 | 16.52 | a | 14.15 | a | 31.93 | c | 49.31 | a | 58.35 | 65.59 | c | 71.18 | 64.23 | c | 57.83 | 47.10 | b | 27.62 | a | 20.55 | 43.70 | |||||
1987 | 18.65 | 28.98 | 37.34 | 51.37 | 60.73 | a | 69.47 | a | 73.95 | 67.68 | 60.32 | b | 42.45 | a | 35.79 | a | 21.65 | 47.36 | ||||||||
1988 | 7.02 | a | 10.78 | b | 30.06 | 45.47 | a | 62.29 | 70.38 | a | 73.66 | 71.89 | 61.15 | m | 42.48 | 31.45 | 16.47 | 41.99 | a | |||||||
1989 | 18.17 | a | 5.87 | a | 23.73 | 42.88 | 56.23 | 63.88 | 68.53 | 68.27 | 58.69 | a | 48.29 | 26.58 | 6.89 | 40.67 | ||||||||||
1990 | 23.58 | 18.88 | 33.63 | 45.60 | 54.42 | a | 66.65 | 68.15 | 68.63 | 61.58 | 45.92 | 35.53 | 15.31 | 44.82 | ||||||||||||
1991 | 9.40 | 20.89 | 32.32 | 47.32 | 60.10 | 69.27 | 68.66 | 69.19 | 57.58 | 45.52 | 22.77 | 17.89 | 43.41 | |||||||||||||
1992 | 18.11 | 25.21 | 31.77 | 40.75 | 59.13 | 62.83 | 63.31 | 63.23 | 58.50 | 46.11 | 29.48 | 19.47 | a | 43.16 | ||||||||||||
1993 | 13.48 | 15.20 | 27.77 | 42.21 | a | 55.77 | 61.95 | 68.58 | 68.50 | 52.78 | 45.11 | 27.93 | 19.26 | 41.55 | ||||||||||||
1994 | 0.47 | a | 8.87 | b | 32.62 | a | 43.87 | 58.17 | a | 67.18 | b | 67.48 | a | 65.13 | 59.46 | p | 50.45 | 35.68 | 23.55 | 41.22 | a | |||||
1995 | 15.37 | 15.06 | a | 32.24 | 39.05 | 54.79 | 69.15 | 70.00 | 71.41 | c | 57.90 | a | 47.17 | a | 23.45 | a | 14.69 | 42.52 | ||||||||
1996 | 6.74 | 15.31 | 22.82 | a | 39.63 | 54.10 | 65.80 | 66.53 | b | 67.84 | c | 59.79 | a | 48.32 | a | 23.95 | a | 13.26 | 40.34 | |||||||
1997 | 6.08 | g | 19.02 | 28.27 | 42.18 | 51.80 | a | 67.43 | b | 68.41 | b | 65.50 | a | 61.55 | 49.53 | 27.65 | 24.84 | 46.02 | a | |||||||
1998 | 17.41 | b | 30.61 | a | 30.50 | 49.42 | 63.22 | a | 63.18 | 69.97 | a | 70.03 | 65.36 | b | 50.10 | a | 36.34 | b | 23.58 | 47.48 | ||||||
1999 | 10.92 | 25.20 | 32.24 | 47.03 | 59.08 | a | 65.42 | 73.23 | a | 67.92 | a | 59.32 | 48.06 | 39.87 | 22.35 | 45.89 | ||||||||||
2000 | 13.16 | 25.03 | 37.84 | 44.03 | 58.74 | 63.02 | b | 70.02 | b | 69.07 | a | 60.11 | b | 52.38 | a | 31.03 | 6.13 | 44.21 | ||||||||
2001 | 18.29 | 10.77 | 27.23 | a | 46.64 | a | 58.44 | 65.96 | b | 71.58 | 70.70 | a | 59.10 | a | 47.24 | 45.07 | a | 30.14 | f | 47.37 | a | |||||
2002 | ----- | z | ----- | z | 32.67 | y | 43.63 | 51.76 | 68.67 | a | 73.32 | 68.45 | a | 62.43 | a | 40.47 | 31.10 | 23.98 | 51.54 | c | ||||||
2003 | 13.37 | 13.89 | a | 28.63 | 45.30 | 55.95 | 65.07 | 69.73 | a | 71.52 | 60.70 | 48.74 | 31.19 | a | 23.52 | 43.97 | ||||||||||
2004 | 8.76 | 20.34 | 32.76 | 46.97 | 53.98 | b | 62.73 | 68.40 | 63.40 | a | 64.68 | 49.06 | 36.42 | 19.18 | 43.89 | |||||||||||
2005 | 13.35 | 23.82 | 29.05 | 50.23 | 54.35 | 70.04 | e | 72.57 | a | 69.05 | 64.95 | 50.67 | a | 34.81 | a | 18.92 | 45.98 | |||||||||
2006 | 26.71 | 17.04 | 31.58 | 51.67 | a | 58.55 | a | 67.33 | 75.32 | 69.27 | a | 57.88 | 44.79 | 34.53 | 27.31 | 46.83 | ||||||||||
2007 | 16.48 | c | 10.71 | 35.47 | 45.22 | 60.28 | a | 69.13 | 71.02 | 68.81 | 61.72 | 52.98 | 32.74 | a | 15.02 | 44.96 | ||||||||||
2008 | 12.87 | 14.03 | 25.42 | 42.67 | 53.78 | a | 64.55 | 69.64 | b | 67.92 | 60.74 | a | 48.21 | 32.89 | b | 12.23 | 42.08 | |||||||||
2009 | 5.02 | 18.52 | c | 30.32 | a | 44.62 | b | 56.98 | a | 64.05 | 65.52 | b | 66.39 | 64.32 | 42.65 | a | 40.83 | 16.69 | 42.99 | |||||||
2010 | 10.63 | a | 17.14 | 38.39 | 51.72 | a | 58.21 | 65.55 | 71.77 | 72.38 | a | 56.95 | 50.63 | 32.60 | 14.31 | 45.02 | ||||||||||
2011 | 9.19 | 16.73 | 26.60 | 43.45 | 55.61 | 65.93 | 74.61 | 69.42 | 59.17 | 52.50 | 37.24 | a | 24.10 | 44.55 | ||||||||||||
2012 | 20.18 | 25.40 | 45.39 | 48.17 | 61.81 | 68.83 | 75.63 | 68.44 | 60.00 | 44.52 | 35.65 | 21.50 | a | 47.96 | ||||||||||||
2013 | 15.68 | 16.23 | 23.73 | 37.22 | 55.03 | 65.22 | 70.40 | 69.60 | 63.73 | 47.66 | 30.78 | a | 9.19 | 42.04 | ||||||||||||
2014 | 4.20 | a | 5.73 | 22.32 | 38.88 | 57.03 | 66.88 | a | 68.15 | 69.19 | 60.35 | 46.40 | 23.92 | 23.02 | 40.51 | |||||||||||
2015 | 15.71 | 8.64 | 33.55 | a | 46.95 | 57.35 | 66.43 | 70.16 | b | 67.42 | 65.52 | a | 48.74 | 39.58 | 28.85 | 45.74 | ||||||||||
2016 | 15.13 | 21.17 | 38.69 | 45.42 | 58.05 | 67.50 | 70.69 | 69.95 | 62.78 | 50.77 | 41.92 | 18.68 | 46.73 | |||||||||||||
2017 | 18.11 | 27.79 | 30.42 | 47.12 | 55.52 | 66.33 | a | 70.13 | 64.95 | 63.72 | 49.37 | a | 29.92 | 15.69 | 44.92 | |||||||||||
2018 | 12.40 | a | 13.41 | 29.27 | 33.52 | 63.89 | 68.73 | 70.70 | a | 69.60 | 61.52 | 43.26 | 24.93 | b | 23.89 | 42.93 | ||||||||||
2019 | 10.76 | 10.39 | 25.87 | 43.32 | 53.26 | 65.82 | 71.63 | a | 67.00 | 63.02 | 44.69 | 27.83 | a | 20.58 | 42.01 | |||||||||||
2020 | 18.42 | 18.72 | 34.52 | 42.40 | 56.05 | 69.63 | 73.00 | 70.00 | 58.75 | 41.27 | 37.93 | 24.08 | 45.40 | |||||||||||||
2021 | 20.89 | 9.89 | 38.32 | 45.50 | 57.48 | 72.12 | 71.55 | 70.77 | 62.55 | 53.95 | 34.84 | a | 21.34 | 46.60 | ||||||||||||
2022 | 7.55 | a | 10.52 | 28.13 | 38.48 | 58.10 | 68.03 | 71.24 | 68.35 | 61.93 | 48.90 | 34.28 | 15.52 | a | 42.59 | |||||||||||
2023 | 19.53 | a | 18.27 | 25.45 | 41.58 | 60.87 | a | 70.32 | 69.24 | 69.89 | 64.57 | 49.37 | 34.67 | 31.84 | 46.30 | |||||||||||
2024 | 19.95 | 30.81 | 34.65 | 46.17 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.89 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.57 | 17.09 | 30.34 | 44.35 | 57.16 | 65.97 | 70.18 | 68.05 | 59.98 | 47.39 | 32.19 | 17.81 | 43.68 | |||||||||||||
S.D. | 6.34 | 6.43 | 5.22 | 4.04 | 3.28 | 2.82 | 2.51 | 2.39 | 3.05 | 3.34 | 5.08 | 6.19 | 2.14 | |||||||||||||
SKEW | -0.33 | 0.33 | 0.39 | -0.26 | 0.19 | -0.08 | -0.10 | -0.46 | -0.10 | -0.21 | 0.06 | -0.34 | 0.23 | |||||||||||||
MAX | 26.71 | 30.81 | 45.39 | 51.72 | 64.57 | 72.12 | 75.63 | 72.38 | 65.52 | 53.95 | 45.07 | 31.84 | 47.96 | |||||||||||||
MIN | -1.45 | 5.73 | 20.52 | 33.52 | 51.21 | 59.20 | 63.31 | 62.73 | 52.78 | 40.47 | 22.77 | 2.16 | 40.34 | |||||||||||||
YRS | 50 | 52 | 52 | 53 | 52 | 53 | 53 | 53 | 50 | 51 | 52 | 51 | 44 |