YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.71 | p | 59.33 | g | 51.93 | 25.77 | 38.85 | j | ||
1950 | 7.97 | 24.57 | 35.29 | 46.32 | b | 64.00 | a | 81.60 | 81.55 | b | 81.53 | a | 73.57 | 62.36 | c | 36.14 | b | 23.97 | a | 51.57 | ||||||
1951 | 17.10 | 27.78 | a | 29.57 | a | 53.55 | a | 71.74 | 72.69 | a | 81.13 | 78.86 | b | 69.15 | c | 56.03 | a | 37.00 | 17.22 | d | 50.98 | |||||
1952 | 15.81 | d | 28.63 | b | 30.03 | b | 59.33 | 70.55 | b | 82.11 | b | 86.03 | b | 85.48 | 81.30 | 60.77 | a | 45.45 | a | 28.27 | e | 56.15 | ||||
1953 | 25.03 | a | 28.63 | a | 41.07 | a | 51.00 | b | 66.55 | 79.23 | d | 82.84 | 83.74 | 76.67 | 68.53 | a | 45.81 | c | 29.61 | 56.56 | ||||||
1954 | 14.23 | a | 43.27 | b | 38.61 | c | 58.57 | 64.68 | c | 77.14 | a | 88.71 | c | 82.70 | a | 69.65 | d | 57.00 | g | 49.85 | c | 28.66 | b | 56.01 | a | |
1955 | 26.10 | a | 21.08 | d | 38.36 | f | 67.11 | b | 75.94 | 76.23 | 87.23 | 86.32 | 75.37 | 65.15 | d | 30.50 | 17.41 | b | 57.13 | a | ||||||
1956 | 20.14 | c | 20.14 | 34.81 | 50.10 | 69.17 | a | 86.83 | a | 82.00 | 83.55 | 74.47 | 68.34 | b | 40.80 | 32.67 | a | 55.25 | ||||||||
1957 | 16.52 | 27.78 | a | 40.29 | 56.40 | 66.84 | 75.70 | 88.27 | a | 81.10 | a | 69.62 | a | 55.73 | a | 40.63 | 35.68 | 54.55 | ||||||||
1958 | 29.97 | 25.93 | 39.00 | 59.40 | e | 76.19 | d | 73.59 | a | 81.10 | a | 89.87 | a | 79.47 | 63.85 | d | 46.34 | a | 26.71 | 57.62 | ||||||
1959 | 19.21 | b | 22.46 | 45.97 | 62.00 | a | 69.75 | c | 86.23 | 88.55 | 91.50 | a | 75.31 | a | 52.24 | f | 34.46 | b | 35.38 | e | 57.35 | a | ||||
1960 | 20.48 | 21.69 | 27.06 | 55.33 | 69.97 | 75.33 | 88.97 | 84.58 | 75.13 | 63.23 | 43.80 | 24.07 | a | 54.14 | ||||||||||||
1961 | 23.19 | 28.46 | 45.45 | 52.77 | 65.52 | 84.57 | 83.10 | 89.13 | a | 67.69 | d | 61.23 | i | 43.24 | a | 22.88 | f | 58.31 | b | |||||||
1962 | 23.22 | d | 21.48 | c | 31.39 | 58.03 | a | 68.48 | 75.72 | a | 80.57 | a | 87.12 | o | 72.56 | u | 64.14 | b | 44.30 | c | 34.22 | d | 50.16 | b | ||
1963 | 14.72 | b | 28.52 | a | 51.04 | c | 58.27 | 68.17 | a | 80.70 | 83.64 | i | 81.05 | i | 73.79 | a | 70.16 | 46.33 | 20.84 | 51.25 | b | |||||
1964 | 27.58 | 35.93 | 35.52 | 59.13 | 73.31 | e | 80.09 | h | 87.19 | 80.90 | 73.40 | 63.80 | a | 41.40 | 16.94 | 54.10 | a | |||||||||
1965 | 14.61 | 23.11 | 29.26 | 54.03 | 69.61 | 76.87 | 83.77 | 84.03 | 61.07 | b | 64.90 | 43.20 | 33.94 | 53.20 | ||||||||||||
1966 | 10.33 | a | 21.39 | 44.35 | 49.63 | 68.94 | 78.87 | 89.07 | a | 79.68 | c | 73.77 | d | 61.00 | a | 35.64 | b | 28.50 | e | 53.43 | ||||||
1967 | 25.42 | e | 21.73 | f | 43.37 | a | 54.71 | f | 65.89 | d | 75.96 | d | 85.60 | f | 84.37 | d | 76.05 | i | 55.53 | n | 42.33 | 28.16 | 52.22 | e | ||
1968 | 21.71 | 24.89 | a | 51.03 | 58.00 | 65.10 | b | 77.83 | 82.68 | 84.42 | 73.20 | 60.57 | a | 41.10 | 20.10 | a | 55.05 | |||||||||
1969 | 11.97 | 24.89 | 28.68 | 57.83 | 72.48 | 73.20 | 82.13 | 87.45 | 77.17 | a | 53.57 | a | 44.80 | 27.77 | 53.50 | |||||||||||
1970 | 13.13 | 28.32 | 32.58 | 52.80 | 70.97 | 83.00 | 89.16 | 87.97 | 78.10 | 60.29 | 35.90 | a | 25.06 | 54.77 | ||||||||||||
1971 | 13.10 | 24.93 | 40.68 | 61.63 | 68.19 | 80.53 | 82.74 | 86.90 | k | 74.03 | 59.60 | a | 39.60 | 21.61 | 51.51 | a | ||||||||||
1972 | 15.52 | 17.93 | 35.26 | 52.77 | 70.13 | 79.17 | 82.45 | 84.55 | 74.00 | 58.03 | 36.93 | 17.26 | 52.00 | |||||||||||||
1973 | 25.35 | 32.79 | 46.23 | 57.13 | 72.45 | 82.47 | 87.70 | a | 90.45 | b | 70.67 | f | 63.86 | b | 37.18 | b | 22.06 | 56.15 | a | |||||||
1974 | 17.90 | 27.54 | 39.16 | 58.00 | 66.48 | 80.10 | 91.39 | 82.87 | a | 75.90 | 66.48 | 43.13 | ----- | z | 59.00 | a | ||||||||||
1975 | 28.65 | k | 25.79 | i | 34.48 | f | 44.39 | g | 70.87 | h | 78.12 | d | 90.65 | 84.42 | 72.96 | b | 64.23 | 44.37 | 27.84 | 66.08 | e | |||||
1976 | 22.03 | 36.83 | 41.38 | b | 62.20 | ----- | z | 84.37 | 92.30 | a | 90.71 | 79.77 | 56.97 | b | 54.00 | x | 26.40 | f | 62.95 | c | ||||||
1977 | 12.61 | c | 35.59 | a | 43.13 | 68.00 | 78.82 | c | 81.87 | 89.67 | a | 79.83 | a | 72.45 | h | 64.22 | m | 39.60 | j | 20.50 | k | 61.19 | d | |||
1978 | 9.85 | k | 18.28 | j | 37.23 | i | 55.84 | k | 72.85 | k | 80.45 | h | 83.96 | d | 85.45 | 80.00 | 62.97 | 37.38 | a | 21.32 | 61.85 | f | ||||
1979 | 9.87 | 11.89 | 33.65 | 47.87 | 63.58 | 78.47 | 82.61 | 79.76 | b | 80.33 | 60.29 | 36.83 | 38.13 | a | 51.94 | |||||||||||
1980 | 21.63 | a | 24.00 | 36.81 | 63.67 | 76.13 | 79.70 | 87.65 | 82.00 | a | 75.07 | 59.23 | 46.38 | a | 28.90 | 56.76 | ||||||||||
1981 | 29.97 | 33.75 | 48.84 | 62.37 | 67.48 | 75.37 | 83.65 | 82.10 | 74.13 | 55.61 | 46.43 | 21.03 | 56.73 | |||||||||||||
1982 | 7.19 | 20.71 | 33.48 | 53.23 | 66.45 | 74.27 | 87.32 | 84.10 | 70.83 | 55.26 | 33.43 | 30.84 | 51.43 | |||||||||||||
1983 | 29.42 | 32.07 | 36.55 | 51.30 | 64.94 | 76.20 | 86.43 | a | 88.87 | 71.90 | 55.45 | 36.60 | 8.90 | a | 53.22 | |||||||||||
1984 | 23.42 | 34.00 | 31.58 | 53.13 | 65.29 | 75.13 | 83.87 | 85.87 | 67.10 | 55.97 | 39.93 | 20.77 | a | 53.01 | ||||||||||||
1985 | 16.94 | 24.79 | 43.52 | 63.23 | 73.87 | 72.47 | 84.87 | 76.52 | 63.60 | 56.58 | 23.93 | 17.50 | a | 51.48 | ||||||||||||
1986 | 24.03 | 17.82 | 42.94 | 52.10 | 67.65 | 77.97 | 82.48 | 77.94 | 64.57 | 57.13 | 34.07 | 35.13 | a | 52.82 | ||||||||||||
1987 | 32.19 | 39.32 | 39.83 | a | 65.97 | 72.48 | 83.47 | 86.48 | 78.84 | 73.30 | 55.77 | 43.40 | 30.35 | 58.45 | ||||||||||||
1988 | 20.58 | e | 25.03 | 43.45 | 61.60 | 75.39 | 87.50 | 87.87 | 83.74 | 70.23 | 55.73 | a | 36.17 | 27.87 | 56.26 | |||||||||||
1989 | 24.52 | 12.96 | 29.35 | 54.43 | 68.97 | 76.77 | 87.90 | 82.77 | 72.47 | 60.29 | 36.17 | 16.52 | 51.93 | |||||||||||||
1990 | 33.68 | 30.82 | 43.84 | 56.70 | 66.65 | 76.90 | 81.45 | 82.45 | 76.93 | 58.74 | 44.67 | 21.68 | 56.21 | |||||||||||||
1991 | 19.81 | 35.39 | 42.58 | 59.00 | 69.00 | 78.57 | 81.65 | 83.97 | 70.93 | 56.94 | 32.43 | 31.29 | 55.13 | |||||||||||||
1992 | 30.10 | 34.00 | 44.65 | 54.87 | 72.16 | 73.00 | 73.90 | 75.03 | 70.37 | 57.58 | 32.07 | 19.55 | 53.11 | |||||||||||||
1993 | 17.55 | 18.21 | 35.74 | 53.73 | 67.71 | 70.77 | 75.06 | 77.55 | 65.23 | 55.00 | 33.80 | 24.10 | 49.54 | |||||||||||||
1994 | 5.77 | 14.61 | 39.13 | 55.87 | 72.45 | 78.67 | 78.13 | 76.65 | 72.63 | 57.97 | 41.43 | 24.94 | 51.52 | |||||||||||||
1995 | 19.16 | 24.89 | 34.16 | 46.67 | 62.97 | 77.40 | 81.23 | 82.77 | 71.10 | 53.23 | 34.63 | 23.16 | 50.95 | |||||||||||||
1996 | 11.35 | 25.14 | 29.10 | 50.23 | 62.32 | 77.47 | 80.13 | 83.55 | 69.57 | 56.10 | 25.23 | 13.65 | 48.65 | |||||||||||||
1997 | 12.45 | 25.25 | 32.42 | 48.66 | a | 65.10 | 78.43 | 79.68 | 80.94 | 74.77 | 58.97 | 31.93 | 32.16 | 51.73 | ||||||||||||
1998 | 20.61 | 33.68 | 32.06 | 59.50 | 70.35 | 72.80 | 83.39 | 81.39 | 76.17 | 57.03 | 38.73 | 31.29 | 54.75 | |||||||||||||
1999 | 17.74 | 35.18 | 44.26 | 54.53 | 67.61 | 74.63 | 82.00 | 80.35 | 65.10 | 56.71 | 50.77 | 36.93 | a | 55.49 | ||||||||||||
2000 | 23.84 | 35.48 | 48.35 | 53.73 | 69.32 | 75.63 | 81.65 | 80.23 | 72.60 | 59.52 | 30.73 | 12.61 | 53.64 | |||||||||||||
2001 | 24.48 | 16.50 | 33.13 | 52.93 | 69.68 | 75.93 | 83.94 | 83.32 | 71.33 | 59.50 | i | 50.23 | 27.23 | 53.52 | a | |||||||||||
2002 | 27.16 | 37.11 | 30.77 | 52.43 | 64.45 | 83.13 | 86.16 | 78.74 | 73.63 | 45.87 | 40.77 | 31.26 | 54.29 | |||||||||||||
2003 | 22.29 | 22.54 | 39.81 | 57.63 | 65.06 | 74.53 | 82.39 | 84.10 | 70.90 | 62.42 | 33.23 | 30.32 | 53.77 | |||||||||||||
2004 | 16.97 | 26.52 | 44.52 | 59.83 | 64.00 | 72.57 | 78.47 | a | 74.61 | 72.03 | 57.06 | 45.40 | 30.97 | 53.58 | ||||||||||||
2005 | 18.27 | a | 32.43 | 40.65 | 61.80 | 63.87 | 76.53 | 81.71 | 79.16 | 76.30 | 60.00 | 43.17 | 24.13 | 54.83 | ||||||||||||
2006 | 31.00 | 27.29 | 38.16 | 60.43 | 67.97 | 77.41 | a | 89.52 | 83.00 | 66.43 | 56.03 | 44.30 | 36.68 | 56.52 | ||||||||||||
2007 | 21.81 | 17.86 | 43.77 | 51.90 | 71.68 | 78.17 | 84.52 | 78.23 | 72.57 | 60.68 | 42.77 | 22.29 | 53.85 | |||||||||||||
2008 | 20.10 | 21.24 | 38.90 | 52.60 | 66.48 | 76.20 | 85.48 | 82.61 | 72.97 | 57.87 | 41.33 | 18.68 | 52.87 | |||||||||||||
2009 | 17.13 | 24.32 | 33.90 | 51.23 | 67.97 | 73.30 | 77.45 | 77.97 | 74.40 | 47.52 | 49.17 | 19.32 | 51.14 | |||||||||||||
2010 | 16.52 | 19.46 | 41.19 | 63.13 | 65.48 | 77.10 | 82.77 | 84.39 | 68.30 | 62.48 | 41.53 | 20.06 | 53.54 | |||||||||||||
2011 | 14.32 | 20.11 | 28.90 | 49.83 | 63.23 | 74.43 | 85.55 | 80.94 | 72.10 | 62.13 | 43.43 | 34.52 | 52.46 | |||||||||||||
2012 | 31.87 | 34.83 | 53.16 | 58.50 | 70.03 | 80.87 | 88.00 | 82.29 | 76.07 | 56.06 | 40.40 | 24.97 | 58.09 | |||||||||||||
2013 | 23.65 | 22.68 | 28.55 | 41.90 | 67.39 | 75.87 | 82.84 | 84.19 | 77.50 | 53.61 | 40.33 | 18.16 | 51.39 | |||||||||||||
2014 | 20.58 | 18.64 | 34.90 | 53.70 | 67.65 | 76.30 | 80.61 | 80.97 | 72.73 | 62.03 | 31.83 | 27.55 | 52.29 | |||||||||||||
2015 | 26.58 | 19.14 | 44.81 | 62.50 | 67.16 | 79.13 | 84.42 | 82.71 | 77.80 | 62.90 | 49.03 | 28.71 | 57.07 | |||||||||||||
2016 | 23.29 | 35.10 | 51.48 | 55.50 | 71.26 | 80.37 | 82.81 | 81.77 | 73.33 | 60.42 | 52.03 | 22.81 | 57.51 | |||||||||||||
2017 | 20.58 | 35.57 | 40.42 | 58.00 | k | 69.23 | 80.63 | 87.19 | 78.13 | 74.13 | 61.16 | 40.63 | 28.81 | 56.04 | a | |||||||||||
2018 | ----- | z | 20.63 | a | 36.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.31 | j | |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.25 | g | 35.80 | 24.29 | 30.05 | j | ||
2020 | 20.55 | 24.93 | 38.19 | 51.70 | 62.87 | 80.30 | 84.48 | 82.84 | 69.83 | 49.39 | 46.60 | 34.16 | 53.82 | |||||||||||||
2021 | 29.10 | 18.29 | 47.77 | 52.80 | 67.35 | 86.07 | 84.03 | 81.87 | 75.17 | 60.29 | 44.30 | 27.23 | 56.19 | |||||||||||||
2022 | 19.16 | 22.86 | 37.97 | 44.57 | 64.58 | 79.47 | 82.97 | 79.81 | 75.73 | 66.57 | x | ----- | z | ----- | z | 56.35 | c | |||||||||
2023 | 22.16 | l | 22.64 | 25.16 | 42.83 | 72.26 | 81.93 | 80.16 | 79.81 | 74.00 | 57.10 | 44.37 | 37.35 | 56.15 | a | |||||||||||
2024 | 19.68 | 37.86 | 41.24 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.93 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.31 | 26.37 | 38.59 | 55.58 | 68.51 | 78.17 | 84.14 | 82.53 | 72.95 | 59.15 | 40.42 | 25.91 | 53.90 | |||||||||||||
S.D. | 6.34 | 6.93 | 6.59 | 5.59 | 3.64 | 3.77 | 3.72 | 3.63 | 4.07 | 4.58 | 6.07 | 6.58 | 2.25 | |||||||||||||
SKEW | -0.04 | 0.23 | 0.08 | -0.10 | 0.56 | 0.49 | -0.14 | 0.32 | -0.52 | -0.22 | -0.34 | -0.17 | 0.05 | |||||||||||||
MAX | 33.68 | 43.27 | 53.16 | 68.00 | 78.82 | 87.50 | 92.30 | 91.50 | 81.30 | 70.16 | 52.03 | 38.13 | 58.45 | |||||||||||||
MIN | 5.77 | 11.89 | 25.16 | 41.90 | 62.32 | 70.77 | 73.90 | 74.61 | 61.07 | 45.87 | 23.93 | 8.90 | 48.65 | |||||||||||||
YRS | 70 | 71 | 71 | 68 | 69 | 70 | 70 | 69 | 68 | 65 | 71 | 69 | 53 |