YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.87 | 31.74 | 41.30 | j | ||
1955 | 26.10 | 26.11 | a | 40.58 | 67.90 | 77.81 | 79.24 | a | 89.90 | 90.37 | a | 78.00 | 64.65 | 37.00 | 22.56 | f | 61.60 | a | ||||||||
1956 | 21.68 | 27.63 | b | 37.03 | a | 55.53 | 72.13 | 87.66 | a | 80.84 | 83.13 | 77.81 | c | 73.42 | 42.43 | 34.81 | 57.84 | |||||||||
1957 | 21.39 | 36.43 | 42.29 | 60.18 | b | 69.00 | 79.33 | c | 89.70 | a | 80.87 | a | 72.37 | 58.32 | 40.23 | 35.39 | 57.12 | |||||||||
1958 | 29.63 | a | 26.29 | 40.45 | 60.76 | a | 76.74 | 76.40 | 79.74 | 85.32 | 77.55 | a | 67.84 | f | 52.20 | e | 28.45 | 57.59 | a | |||||||
1959 | 20.45 | b | 25.54 | 42.30 | a | 60.79 | a | 72.84 | 83.20 | 84.74 | 85.58 | 73.43 | 55.52 | 34.40 | 36.94 | 56.31 | ||||||||||
1960 | 26.06 | 26.66 | 28.35 | 58.33 | 70.29 | 77.73 | 83.77 | 83.10 | 73.43 | 63.29 | 47.93 | 28.97 | 55.66 | |||||||||||||
1961 | 24.90 | 31.96 | 38.90 | 50.47 | 66.97 | 80.90 | 82.48 | 82.52 | 71.43 | 64.90 | 41.88 | e | 25.26 | 55.21 | ||||||||||||
1962 | 19.90 | a | 23.96 | 32.61 | 56.60 | j | 74.42 | 79.13 | 80.06 | 81.77 | 70.37 | 64.23 | 49.47 | 32.48 | 55.31 | a | ||||||||||
1963 | 15.45 | 27.54 | 46.84 | 60.63 | 70.26 | 83.83 | 82.10 | 79.16 | 76.20 | 74.81 | 49.93 | 21.03 | 57.32 | |||||||||||||
1964 | 35.29 | 40.21 | a | 38.26 | 58.57 | 77.55 | 81.38 | a | 86.90 | 78.45 | 74.03 | 63.39 | 48.80 | 22.39 | 58.77 | |||||||||||
1965 | 21.61 | c | 24.93 | ----- | z | ----- | z | 72.76 | f | 81.50 | 85.19 | 81.40 | a | 66.12 | f | ----- | z | 41.17 | l | 38.71 | 55.56 | f | ||||
1966 | ----- | z | ----- | z | ----- | z | ----- | z | 78.78 | m | 84.74 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | 56.68 | h | 64.45 | 75.43 | 80.61 | 77.39 | 71.48 | a | 66.00 | k | 44.92 | e | 32.13 | 63.77 | e | |||||
1968 | 25.74 | 25.90 | 50.90 | 59.47 | 66.19 | 79.07 | 81.52 | 80.61 | 71.60 | 64.83 | a | 44.33 | 28.10 | 56.52 | ||||||||||||
1969 | 17.29 | 25.96 | a | 30.68 | 56.73 | 70.39 | 71.70 | 82.58 | 83.03 | 74.40 | 59.06 | 43.73 | 29.10 | 53.72 | ||||||||||||
1970 | 12.77 | a | 28.89 | 34.26 | 57.73 | 72.06 | 82.20 | 84.45 | 80.90 | 73.37 | 60.26 | 41.90 | 27.13 | 54.66 | ||||||||||||
1971 | 19.39 | 25.39 | 34.26 | 60.40 | 68.19 | 82.97 | 79.26 | 81.32 | 74.47 | 68.65 | 44.70 | 27.29 | 55.52 | |||||||||||||
1972 | 20.26 | 22.86 | 40.19 | 51.90 | 72.61 | 78.17 | 79.19 | 79.55 | 71.87 | 58.13 | 39.30 | 22.13 | 53.01 | |||||||||||||
1973 | 25.06 | 29.39 | 45.84 | 55.07 | 67.19 | 81.50 | 82.00 | 82.97 | 71.73 | 66.81 | 44.07 | 24.53 | a | 56.35 | ||||||||||||
1974 | 23.16 | 28.54 | 41.45 | 58.33 | 66.13 | 77.87 | 87.03 | 77.90 | 70.47 | 63.52 | 43.97 | 29.97 | 55.69 | |||||||||||||
1975 | 27.83 | a | 23.63 | a | 31.94 | 45.20 | 73.23 | 77.73 | 86.10 | 83.39 | 68.60 | 67.65 | 48.30 | 29.74 | 55.28 | |||||||||||
1976 | 24.74 | 40.79 | a | 41.65 | 62.90 | 70.39 | 83.10 | 86.65 | 85.13 | 75.50 | 56.68 | 40.07 | 24.00 | 57.63 | ||||||||||||
1977 | ----- | z | 36.25 | 47.55 | 65.70 | 80.19 | 81.40 | ----- | z | 79.87 | 75.67 | 59.71 | 41.77 | 24.00 | 59.21 | b | ||||||||||
1978 | 15.74 | 21.07 | 42.39 | 56.90 | 73.97 | 81.33 | 82.16 | 82.58 | 80.83 | 62.39 | 41.59 | a | 23.32 | 55.36 | ||||||||||||
1979 | 10.45 | 18.64 | 35.45 | 51.33 | 70.75 | c | 81.72 | a | 83.39 | 79.35 | 76.73 | 61.03 | 40.67 | 37.43 | a | 53.91 | ||||||||||
1980 | 26.23 | 26.03 | 38.77 | 61.20 | 74.26 | 83.27 | 87.32 | 81.45 | 77.43 | 58.06 | 50.17 | 29.10 | 57.77 | |||||||||||||
1981 | 31.43 | a | 36.15 | a | 52.52 | 65.17 | 71.03 | 82.43 | 83.48 | 79.10 | 74.53 | 57.23 | 49.57 | b | 25.71 | 59.03 | ||||||||||
1982 | 11.86 | c | 26.29 | 39.39 | 55.43 | 71.10 | 75.54 | b | 84.81 | 79.93 | a | 71.10 | 61.74 | 38.61 | b | 33.53 | a | 54.11 | ||||||||
1983 | 27.13 | 32.41 | a | 39.87 | a | 51.20 | 67.39 | 78.47 | 87.19 | 88.87 | 74.87 | 59.71 | 40.70 | 11.90 | 54.98 | |||||||||||
1984 | 22.84 | 32.72 | 31.23 | a | 55.70 | 69.13 | 80.10 | a | 83.94 | 86.53 | a | 74.03 | 61.16 | 44.52 | a | 29.45 | 55.95 | |||||||||
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.87 | 83.31 | b | 77.32 | 70.96 | c | 59.70 | d | 31.30 | 18.47 | a | 60.13 | e | |||
1986 | 27.81 | 23.89 | 46.80 | a | 61.92 | d | 72.00 | 83.59 | a | 85.00 | a | 77.58 | 72.55 | a | ----- | z | ----- | z | ----- | z | 61.24 | c | ||||
1987 | ----- | z | ----- | z | ----- | z | ----- | z | 81.20 | a | 85.10 | a | 86.00 | 77.94 | 74.21 | a | 58.42 | 47.83 | 32.35 | 67.88 | d | |||||
1988 | 19.65 | 24.04 | b | 47.48 | 61.07 | 79.23 | e | 88.13 | 86.43 | a | 86.52 | 77.28 | a | 57.06 | 43.80 | 29.84 | 58.38 | |||||||||
1989 | 35.90 | a | 23.86 | 38.87 | 58.75 | b | 73.39 | 80.33 | 85.55 | 82.39 | 72.93 | 64.87 | 41.73 | 21.00 | 56.63 | |||||||||||
1990 | 39.32 | 37.07 | 47.32 | 60.13 | 68.23 | 82.07 | 80.58 | 80.48 | 76.27 | 61.55 | 49.37 | 25.58 | 59.00 | |||||||||||||
1991 | 21.03 | 35.18 | 45.52 | 60.97 | 71.61 | 83.28 | a | 82.26 | 80.32 | 71.57 | 60.28 | b | 32.14 | a | 31.26 | 56.28 | ||||||||||
1992 | 32.58 | 34.03 | 45.67 | a | 54.45 | a | 73.42 | 78.97 | 74.58 | 75.68 | 73.07 | 59.90 | 35.90 | 28.06 | 55.53 | |||||||||||
1993 | 21.87 | 22.43 | 33.45 | 52.93 | 67.61 | 75.17 | a | 79.52 | 79.29 | 65.90 | 59.81 | 40.37 | 29.06 | 52.28 | ||||||||||||
1994 | 14.19 | 21.29 | 45.52 | 60.87 | 75.61 | 80.70 | 78.93 | a | 76.94 | 75.69 | a | 62.00 | a | 46.40 | 29.39 | 55.63 | ||||||||||
1995 | 24.67 | a | 31.46 | 42.37 | a | 52.43 | 66.74 | 79.40 | 83.77 | a | 84.32 | 70.67 | 59.30 | a | 37.17 | 29.32 | 55.13 | |||||||||
1996 | 21.61 | 30.45 | 38.87 | 55.10 | 64.87 | 80.03 | a | 80.27 | a | 79.52 | 69.60 | 63.03 | 32.72 | a | 20.39 | 53.04 | ||||||||||
1997 | 19.87 | 29.14 | 42.10 | 55.23 | 66.70 | a | 82.90 | 81.32 | 78.00 | 74.63 | 64.16 | 34.17 | 32.00 | e | 55.02 | |||||||||||
1998 | 23.48 | f | 36.29 | 37.71 | 60.30 | 76.75 | c | 90.00 | x | 88.03 | a | 80.32 | 80.87 | 61.74 | 47.04 | c | 38.62 | b | 60.77 | b | ||||||
1999 | 19.53 | a | 36.07 | 43.39 | 56.28 | a | 71.20 | a | 77.83 | 86.55 | 79.45 | 76.46 | b | 62.52 | 54.80 | 35.23 | a | 58.28 | ||||||||
2000 | 25.97 | 38.17 | 51.84 | 58.70 | 73.97 | a | 77.36 | b | 80.77 | 80.32 | 77.21 | a | 64.32 | 36.97 | 16.10 | 56.81 | ||||||||||
2001 | 26.42 | 23.83 | d | 32.94 | 59.67 | 72.00 | 80.93 | b | 86.35 | 83.06 | 71.23 | 62.77 | 62.66 | a | 40.26 | 58.51 | ||||||||||
2002 | 33.93 | a | 35.86 | 33.30 | a | ----- | z | ----- | z | 88.67 | r | 87.71 | c | 80.36 | c | 75.22 | g | 52.97 | 43.07 | a | 37.36 | c | 50.57 | d | ||
2003 | 25.96 | c | 28.00 | 43.07 | b | 59.73 | 65.41 | d | 77.96 | d | 82.03 | a | 85.08 | e | 74.92 | e | 65.03 | 42.48 | c | 31.07 | c | 56.73 | ||||
2004 | 27.16 | l | 27.15 | b | 46.71 | 64.00 | c | 69.15 | d | 76.50 | f | 79.26 | 75.89 | c | 78.60 | e | 60.48 | 48.15 | c | 33.31 | b | 58.27 | b | |||
2005 | 22.06 | 36.36 | 42.52 | h | 63.03 | 65.87 | a | 83.35 | g | 84.14 | c | 80.45 | b | 76.35 | g | 63.84 | 47.38 | a | 22.17 | b | 53.92 | c | ||||
2006 | 32.09 | h | 24.93 | m | ----- | z | 64.60 | 70.57 | a | 79.81 | c | 86.96 | c | 80.19 | 70.46 | f | 57.68 | 47.07 | b | 35.77 | a | 65.33 | d | |||
2007 | 25.10 | a | 16.65 | e | 46.46 | e | 54.75 | b | 77.03 | 82.58 | f | 84.89 | d | 80.20 | f | 76.55 | h | 64.32 | 45.18 | b | 22.61 | c | 48.55 | c | ||
2008 | 20.13 | a | 24.05 | i | 36.75 | c | 53.00 | b | 68.00 | f | 79.23 | d | 82.85 | d | 81.36 | f | 74.81 | c | 61.15 | d | 43.37 | c | 22.57 | c | 52.65 | c |
2009 | 18.19 | e | 30.80 | m | 42.04 | e | 56.79 | b | 70.21 | g | 77.27 | h | 77.35 | e | 75.57 | j | 75.17 | g | 50.57 | c | 51.45 | a | 21.79 | b | 45.45 | e |
2010 | 17.46 | e | 20.20 | m | 42.64 | f | 66.36 | b | 71.41 | d | 78.04 | e | 83.00 | e | 82.72 | m | 72.96 | f | 66.40 | a | 44.60 | e | 21.48 | 56.09 | d | |
2011 | 21.24 | j | 25.84 | c | 38.95 | l | 54.64 | b | 67.34 | b | 75.73 | d | 85.60 | a | 81.84 | f | 72.86 | h | 66.10 | b | 47.68 | e | 35.29 | c | 57.28 | d |
2012 | 35.89 | m | 36.07 | b | 59.15 | e | 63.77 | d | 75.79 | b | 82.32 | e | 87.90 | a | 84.92 | g | 78.30 | g | 58.61 | c | 49.20 | j | 32.96 | d | 62.07 | d |
2013 | 27.89 | m | 27.81 | b | 32.77 | e | 49.48 | e | 66.41 | d | 78.26 | c | 83.48 | b | 83.32 | l | 79.58 | f | 60.29 | c | 41.68 | b | 23.43 | c | 51.51 | c |
2014 | 21.81 | e | 21.60 | h | 37.33 | j | 55.54 | d | 68.62 | b | 78.40 | e | 78.15 | k | 78.84 | l | 71.88 | d | 61.65 | 36.08 | d | 29.30 | d | 52.91 | d | |
2015 | 27.80 | f | 23.56 | l | 50.00 | h | 62.29 | f | 66.71 | g | 79.64 | e | 80.54 | e | 75.53 | n | 78.36 | e | 64.38 | b | 48.00 | g | 34.29 | g | 75.73 | h |
2016 | 22.20 | f | 29.27 | n | 48.00 | c | 61.50 | p | 69.45 | b | 83.56 | e | 82.13 | h | 81.89 | m | 76.56 | e | 65.25 | k | 53.59 | a | 29.70 | h | 66.23 | g |
2017 | 28.50 | g | 41.00 | i | 40.73 | p | 57.04 | b | 66.50 | i | 81.38 | d | 84.39 | h | 76.25 | k | 76.00 | j | 61.21 | b | 44.05 | k | 29.36 | f | 66.54 | i |
2018 | 23.05 | i | 24.28 | c | 38.19 | o | 42.04 | b | 73.89 | d | 80.44 | c | 81.10 | 78.45 | 73.70 | 53.90 | 34.20 | 29.13 | 57.11 | b | ||||||
2019 | 21.68 | 17.11 | 33.87 | a | 55.10 | 62.66 | b | 77.71 | b | 81.30 | a | 75.94 | 74.27 | 53.68 | c | 37.10 | 29.13 | a | 51.63 | |||||||
2020 | 25.55 | 27.22 | b | 43.29 | 55.21 | a | 66.59 | b | 82.79 | b | 82.30 | a | 80.15 | d | 71.45 | a | 52.29 | 48.38 | a | 33.71 | 55.74 | |||||
2021 | 28.26 | d | 15.50 | 47.84 | 56.93 | 69.33 | d | 85.47 | 81.29 | 80.41 | d | 76.61 | l | 62.54 | c | 44.21 | b | 34.84 | 55.15 | a | ||||||
2022 | 22.13 | 24.46 | 41.23 | 49.13 | 70.10 | 80.73 | 82.39 | 78.75 | c | 73.80 | 61.48 | 43.70 | 22.03 | 54.16 | ||||||||||||
2023 | 27.27 | i | 27.12 | c | 36.62 | g | 56.00 | h | 74.52 | j | 81.61 | l | 77.18 | n | 80.17 | m | 71.50 | x | 60.23 | e | 48.27 | 39.55 | 43.79 | h | ||
2024 | 19.57 | j | 47.05 | h | 50.15 | e | 58.00 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.15 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 23.34 | 28.33 | 41.26 | 57.52 | 71.01 | 80.35 | 83.34 | 81.01 | 74.05 | 61.42 | 43.75 | 28.74 | 55.91 | |||||||||||||
S.D. | 5.95 | 6.01 | 6.37 | 5.04 | 4.13 | 2.99 | 3.09 | 3.12 | 2.98 | 4.38 | 5.98 | 6.07 | 1.83 | |||||||||||||
SKEW | 0.33 | 0.16 | 0.19 | -0.50 | 0.40 | 0.02 | -0.11 | 0.76 | 0.01 | 0.24 | 0.18 | -0.25 | -0.23 | |||||||||||||
MAX | 39.32 | 40.79 | 59.15 | 67.90 | 81.20 | 88.13 | 89.90 | 90.37 | 80.87 | 74.81 | 62.66 | 40.26 | 59.03 | |||||||||||||
MIN | 10.45 | 15.50 | 28.35 | 42.04 | 62.66 | 71.70 | 74.58 | 75.68 | 65.90 | 50.57 | 31.30 | 11.90 | 51.63 | |||||||||||||
YRS | 53 | 57 | 56 | 59 | 60 | 61 | 63 | 56 | 55 | 63 | 64 | 64 | 40 |