YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.06 | 36.77 | 27.13 | 37.65 | i | |||
1963 | 11.90 | a | 26.69 | b | 34.65 | 43.30 | 61.29 | 67.43 | 74.48 | 67.45 | 60.93 | 49.29 | 31.90 | 15.84 | 45.43 | |||||||||||
1964 | 15.48 | 19.72 | 27.81 | 37.20 | 55.61 | 66.00 | 72.94 | 64.97 | 55.70 | 45.77 | 22.53 | 15.19 | 41.58 | |||||||||||||
1965 | 16.77 | 20.82 | 28.58 | 36.65 | j | 48.74 | d | 60.70 | 68.61 | 67.52 | 53.20 | 44.81 | 33.60 | 21.52 | 42.26 | a | ||||||||||
1966 | 14.29 | 17.79 | 35.39 | 44.53 | 59.00 | 64.23 | 71.39 | 68.29 | 58.87 | 42.52 | 32.30 | 18.54 | c | 43.93 | ||||||||||||
1967 | 11.10 | u | 27.77 | f | 39.32 | 40.12 | m | 56.13 | 66.37 | 74.21 | c | 70.20 | a | 58.03 | 48.10 | 31.80 | 9.90 | 50.45 | c | |||||||
1968 | 8.71 | 27.79 | a | 34.48 | 38.83 | 54.16 | 69.13 | 71.65 | 62.69 | b | 60.87 | 46.65 | 27.77 | 7.74 | 42.54 | |||||||||||
1969 | 14.29 | 22.82 | 27.94 | 45.03 | a | 60.35 | 62.93 | a | 73.16 | 73.27 | a | 62.77 | 39.52 | 29.33 | 24.39 | 44.65 | ||||||||||
1970 | 22.55 | 27.89 | i | 29.94 | 35.10 | 49.94 | 58.33 | 65.58 | 66.23 | 51.73 | 38.43 | a | 31.73 | 23.84 | 43.04 | a | ||||||||||
1971 | 20.19 | 25.04 | 29.97 | 37.43 | 44.58 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.44 | g | |||||
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.40 | 16.13 | 23.26 | j | ||
1973 | 12.90 | 26.43 | 31.06 | 35.20 | 46.97 | 54.00 | 64.00 | 59.00 | 44.80 | 35.06 | 29.62 | a | 20.65 | 38.31 | ||||||||||||
1974 | 14.74 | 15.30 | h | 35.14 | i | 36.50 | 52.45 | 57.13 | 63.28 | m | 57.77 | 50.56 | e | 44.13 | 32.00 | n | 19.08 | f | 44.76 | e | ||||||
1975 | 16.45 | 23.68 | f | 30.35 | 36.62 | d | 44.71 | 51.20 | 60.39 | h | 60.19 | 53.12 | v | 36.45 | ----- | z | ----- | z | 39.43 | e | ||||||
1976 | 21.12 | n | 27.66 | 27.94 | 38.00 | 47.42 | 54.38 | a | 62.48 | 58.61 | 51.24 | a | 36.10 | 24.70 | 15.17 | a | 40.34 | a | ||||||||
1977 | 13.45 | 24.54 | 26.84 | 39.17 | 49.35 | 62.57 | 64.65 | 62.84 | 57.03 | 41.29 | 30.90 | 24.04 | c | 41.39 | ||||||||||||
1978 | 25.61 | c | 25.07 | 34.13 | 39.20 | 44.39 | 57.00 | a | 61.43 | a | 59.10 | 51.55 | a | 40.35 | 30.77 | 11.84 | 40.04 | |||||||||
1979 | 12.45 | 19.29 | 27.37 | a | 34.55 | a | 44.16 | 53.03 | a | 57.32 | 55.23 | 48.20 | 41.61 | 26.53 | 20.31 | b | 36.67 | |||||||||
1980 | 27.45 | 29.08 | c | 31.50 | a | 38.27 | 45.03 | 58.73 | 63.61 | 62.74 | 52.79 | b | 38.48 | 28.13 | 24.76 | b | 41.71 | |||||||||
1981 | 21.29 | 24.04 | 31.06 | 43.90 | a | 47.39 | 62.33 | 63.16 | 59.61 | 52.23 | 39.39 | 28.90 | 22.41 | b | 41.31 | |||||||||||
1982 | 22.13 | 20.32 | 32.19 | 37.90 | 47.84 | 54.20 | 64.39 | 62.74 | 55.10 | a | 36.37 | a | 31.20 | 24.25 | c | 40.72 | ||||||||||
1983 | 20.48 | 25.86 | 33.74 | 36.14 | a | 47.26 | 54.90 | a | 63.68 | 65.52 | 56.14 | a | 41.86 | b | 32.53 | 23.10 | a | 41.77 | ||||||||
1984 | 18.32 | 23.86 | 31.74 | 36.10 | 53.42 | 55.20 | 64.60 | a | 61.77 | 53.83 | a | 38.00 | 32.83 | 25.39 | 41.26 | |||||||||||
1985 | 23.17 | a | 22.14 | 34.39 | 40.47 | 50.26 | 57.30 | 64.86 | b | 60.84 | 49.59 | a | 42.55 | 31.60 | 22.29 | 41.62 | ||||||||||
1986 | 23.23 | 30.54 | 34.87 | a | 40.80 | 47.71 | 60.30 | 63.03 | 64.40 | a | 53.80 | 40.65 | 32.20 | 24.39 | 42.99 | |||||||||||
1987 | 20.71 | 29.19 | b | 30.32 | c | 41.37 | 49.19 | 59.90 | a | 64.45 | 61.81 | 52.83 | a | 43.74 | 31.66 | a | 21.56 | d | 42.23 | |||||||
1988 | 18.20 | a | 26.76 | 30.26 | 40.67 | 47.61 | 60.40 | 66.39 | 64.13 | a | 53.03 | 45.48 | 32.80 | 21.74 | 42.29 | |||||||||||
1989 | 16.52 | 24.82 | 37.39 | 46.30 | 52.03 | a | 58.47 | 66.42 | 62.03 | 56.07 | 42.42 | 30.13 | 19.39 | 42.67 | ||||||||||||
1990 | 17.83 | b | 26.86 | 35.81 | 42.17 | 49.65 | 62.97 | 64.83 | a | 61.84 | 57.46 | b | 40.83 | a | 29.57 | 13.97 | 41.98 | |||||||||
1991 | 16.65 | 26.64 | 32.52 | ----- | z | 51.60 | u | 56.90 | 63.97 | b | 63.03 | a | 55.86 | b | 44.87 | a | 37.60 | 29.10 | 42.71 | b | ||||||
1992 | 24.32 | 32.72 | 39.13 | 46.93 | 51.84 | 57.41 | a | 65.42 | 62.03 | a | 54.03 | a | 44.68 | 28.13 | 17.77 | a | 43.70 | |||||||||
1993 | 30.52 | 29.89 | a | 33.48 | b | 37.50 | 48.34 | b | 56.76 | a | 64.67 | a | 61.30 | a | 53.04 | b | 40.32 | 27.47 | 21.96 | c | 42.10 | |||||
1994 | 22.55 | 25.11 | 34.26 | 40.97 | 49.55 | 62.03 | 67.73 | a | 66.65 | 56.00 | 40.71 | 29.67 | 24.80 | a | 43.33 | |||||||||||
1995 | 27.32 | 31.70 | a | 34.55 | 38.07 | a | 44.62 | e | 53.89 | c | 60.93 | b | 65.52 | b | 56.22 | c | 40.12 | e | 30.59 | a | 23.52 | 42.25 | ||||
1996 | 23.16 | 29.58 | c | 33.23 | 40.63 | 54.83 | a | 62.21 | a | 67.71 | 65.42 | 51.30 | 42.26 | 31.77 | 26.43 | a | 44.04 | |||||||||
1997 | 21.48 | 28.04 | a | 33.90 | 38.39 | b | 50.87 | a | 60.00 | 63.32 | 62.04 | d | 57.37 | 38.77 | a | 31.66 | a | 22.47 | a | 42.36 | ||||||
1998 | 25.32 | 28.57 | 31.71 | c | 37.00 | 48.43 | a | 56.53 | 66.23 | 64.74 | 57.67 | 43.68 | 32.31 | a | 22.93 | a | 42.93 | |||||||||
1999 | 27.17 | a | 27.75 | 36.71 | 37.53 | 46.67 | a | 59.04 | b | 65.84 | 62.39 | 52.41 | a | 39.43 | a | 30.86 | a | 20.48 | d | 42.19 | ||||||
2000 | 27.53 | a | 31.10 | 32.68 | 44.34 | a | 54.45 | 63.87 | 67.30 | a | 66.00 | b | 57.20 | 43.70 | a | 27.31 | a | 24.84 | 45.03 | |||||||
2001 | 23.93 | a | 30.56 | a | 35.70 | a | 42.25 | b | 53.00 | b | 60.62 | a | 66.70 | a | 64.29 | 56.90 | 45.29 | 35.24 | a | 24.00 | f | 46.77 | a | |||
2002 | 23.41 | i | 21.00 | i | 31.61 | c | 44.61 | b | 51.39 | c | 61.96 | f | 68.90 | k | 63.55 | k | 57.53 | m | 41.14 | j | 29.33 | l | 24.00 | k | 42.54 | i |
2003 | 28.32 | i | 27.32 | i | 33.33 | j | 41.35 | j | 51.05 | l | 59.75 | j | 68.75 | k | 67.91 | i | 55.25 | j | 46.00 | i | 32.11 | l | 23.75 | k | ----- | z |
2004 | 20.40 | p | 26.65 | l | 38.28 | f | 42.50 | f | 53.90 | k | 57.65 | g | 63.33 | g | 63.27 | e | 54.09 | g | 42.65 | k | 30.68 | e | 23.37 | d | 39.11 | i |
2005 | 30.25 | g | 30.43 | g | 31.19 | d | 40.44 | c | 48.93 | d | 57.44 | c | 65.16 | f | 62.72 | f | 55.08 | d | 43.76 | n | 28.48 | g | 10.33 | j | 46.62 | g |
2006 | 18.16 | f | 20.30 | h | 32.40 | a | 41.50 | j | 50.71 | c | 59.20 | e | 68.50 | k | 62.70 | h | 46.24 | i | 42.54 | c | 31.20 | j | 17.58 | g | 46.21 | h |
2007 | 19.27 | a | 28.79 | 32.55 | b | 41.36 | b | 48.62 | g | 57.64 | b | 67.17 | h | 65.87 | h | 52.47 | k | 43.57 | h | 29.85 | j | 19.67 | j | 35.92 | g | |
2008 | 16.15 | e | 28.00 | b | 25.93 | a | 37.61 | b | 38.86 | i | 50.29 | w | 65.77 | 64.43 | h | 52.80 | e | 42.26 | d | 32.27 | h | 17.91 | i | 38.36 | e | |
2009 | 23.17 | g | 27.04 | d | 27.00 | i | 39.55 | h | 54.70 | k | 59.15 | j | 65.47 | l | 56.76 | f | 55.13 | g | 39.43 | j | 28.74 | k | 16.47 | l | 27.04 | k |
2010 | 15.54 | g | 25.86 | g | 32.04 | h | 36.00 | h | 40.30 | k | 58.58 | f | 63.38 | e | 60.75 | g | 51.73 | h | 44.23 | i | 28.00 | h | 25.48 | h | 63.38 | k |
2011 | 13.86 | j | 16.35 | b | 31.52 | 37.03 | 43.55 | 59.83 | 65.83 | a | 59.86 | b | 52.52 | c | 41.93 | b | 29.46 | b | 18.13 | 41.46 | a | |||||
2012 | 21.33 | a | 26.93 | b | 28.48 | 40.24 | e | 48.87 | 61.82 | b | 63.68 | 60.41 | d | 54.00 | 41.52 | 27.40 | 21.87 | a | 41.38 | |||||||
2013 | 12.53 | a | 24.46 | 31.83 | a | 38.13 | 46.45 | 60.73 | 68.07 | a | 62.86 | c | 56.77 | 39.13 | 31.03 | a | 18.84 | 40.90 | ||||||||
2014 | 21.16 | 23.83 | d | 33.20 | a | 37.07 | 43.94 | 56.15 | d | 67.61 | 61.66 | b | 55.04 | d | 44.74 | h | 29.05 | k | 28.77 | i | 44.41 | c | ||||
2015 | 24.86 | i | 28.74 | a | 36.19 | 40.67 | 47.19 | 59.41 | a | 62.77 | 63.16 | 56.27 | 47.71 | 28.90 | 22.03 | a | 44.82 | a | ||||||||
2016 | 21.23 | 27.72 | 32.32 | 39.79 | k | 47.19 | 64.97 | 59.52 | 57.71 | 54.27 | 44.74 | 35.77 | 23.81 | 42.66 | a | |||||||||||
2017 | 26.48 | 31.32 | 36.48 | 38.03 | 44.19 | 57.33 | 65.17 | a | 58.71 | 55.50 | 41.77 | 35.50 | b | 20.94 | 42.62 | |||||||||||
2018 | 24.45 | 29.86 | 33.03 | 45.20 | 51.90 | 64.80 | 69.03 | 66.10 | 58.03 | a | 45.23 | 26.77 | 24.77 | 44.93 | ||||||||||||
2019 | 23.67 | a | 24.11 | a | 36.87 | a | 43.93 | 46.10 | 58.76 | a | 67.73 | a | 65.52 | 57.76 | a | 38.06 | 27.00 | q | 24.35 | e | 44.26 | a | ||||
2020 | 19.27 | p | 28.27 | n | 38.00 | 42.67 | 55.00 | a | 60.59 | a | 68.16 | 69.48 | 55.66 | a | 40.61 | 32.60 | 18.94 | 48.17 | b | |||||||
2021 | 21.77 | 27.43 | 34.10 | 42.30 | 50.29 | 63.57 | 68.37 | d | 64.00 | 56.20 | 42.13 | 33.30 | 27.32 | 44.23 | ||||||||||||
2022 | 20.16 | 22.82 | 32.45 | 43.03 | 53.03 | 62.47 | 69.23 | 65.67 | a | 61.60 | 44.42 | 27.47 | 28.90 | 44.27 | ||||||||||||
2023 | 27.68 | 23.64 | 33.19 | 39.50 | 52.04 | c | 57.57 | 69.03 | 65.16 | 55.77 | 43.52 | 32.37 | 26.58 | 43.84 | ||||||||||||
2024 | 25.74 | 29.97 | 35.23 | a | 40.00 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.31 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.42 | 26.20 | 32.74 | 40.00 | 49.81 | 59.64 | 66.09 | 63.29 | 54.97 | 42.08 | 30.74 | 21.42 | 42.37 | |||||||||||||
S.D. | 5.05 | 3.69 | 3.06 | 3.16 | 4.21 | 3.87 | 3.56 | 3.44 | 3.35 | 3.29 | 2.95 | 4.61 | 1.79 | |||||||||||||
SKEW | -0.23 | -0.63 | -0.08 | 0.36 | 0.72 | 0.21 | 0.37 | 0.30 | -0.26 | 0.10 | -0.14 | -0.95 | -0.87 | |||||||||||||
MAX | 30.52 | 32.72 | 39.32 | 46.93 | 61.29 | 69.13 | 74.48 | 73.27 | 62.77 | 49.29 | 37.60 | 29.10 | 45.43 | |||||||||||||
MIN | 8.71 | 16.35 | 25.93 | 34.55 | 43.55 | 51.20 | 57.32 | 55.23 | 44.80 | 35.06 | 22.53 | 7.74 | 36.67 | |||||||||||||
YRS | 49 | 50 | 56 | 51 | 53 | 53 | 50 | 51 | 51 | 52 | 49 | 49 | 36 |