YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.83 | g | 58.85 | e | 33.83 | 26.59 | b | 39.76 | i | |
1952 | 24.26 | 34.04 | a | 37.06 | 61.38 | a | 69.52 | 80.28 | a | 83.81 | 79.93 | a | 74.76 | e | 56.53 | l | 44.90 | a | 28.94 | 56.26 | a | |||||
1953 | 26.42 | 27.57 | 37.62 | b | 49.45 | a | 67.68 | 79.87 | 83.03 | a | 82.83 | b | ----- | z | ----- | z | 47.29 | b | 29.35 | 53.11 | b | |||||
1954 | 18.65 | 36.75 | 34.94 | 55.20 | 59.71 | 79.27 | 81.26 | 77.81 | 65.70 | 54.45 | 43.13 | 29.13 | 53.00 | |||||||||||||
1955 | 22.16 | 24.86 | 34.81 | 63.63 | 74.26 | 76.70 | 86.84 | 83.45 | 70.53 | 59.84 | 32.77 | 21.58 | 54.29 | |||||||||||||
1956 | 26.58 | 27.48 | 36.35 | 49.70 | 66.94 | 79.90 | 76.35 | 78.10 | 68.07 | 66.03 | 39.97 | 29.52 | 53.75 | |||||||||||||
1957 | 15.68 | 27.54 | 39.26 | 57.13 | 67.87 | 76.62 | f | 82.90 | 79.32 | 68.10 | 56.39 | 37.93 | 29.94 | 51.10 | a | |||||||||||
1958 | 26.90 | 25.07 | 39.90 | 59.12 | d | 71.26 | 71.13 | 77.45 | 78.24 | f | 69.93 | 59.06 | 41.80 | 20.32 | 51.09 | a | ||||||||||
1959 | 17.00 | 26.11 | 41.87 | 55.23 | 71.39 | 79.40 | 83.10 | 82.10 | 70.77 | 51.61 | 30.93 | 34.13 | a | 53.64 | ||||||||||||
1960 | 23.74 | 28.86 | 34.10 | a | 54.03 | 66.61 | 75.57 | 83.94 | 81.71 | 70.70 | 59.68 | 42.53 | 26.22 | d | 53.97 | |||||||||||
1961 | 22.45 | 34.89 | 43.45 | 50.43 | 67.42 | 78.74 | k | 81.90 | 86.35 | 70.87 | 61.03 | 39.77 | 24.39 | 53.00 | a | |||||||||||
1962 | 17.84 | 22.43 | 39.29 | 52.53 | 71.03 | 75.97 | 77.94 | 79.74 | 67.87 | 59.71 | 41.30 | 26.55 | 52.68 | |||||||||||||
1963 | 13.33 | a | 22.61 | 44.26 | 59.97 | 67.77 | 80.83 | 86.00 | 79.10 | 73.53 | 70.03 | 46.03 | 19.71 | 55.26 | ||||||||||||
1964 | 31.16 | 32.76 | 35.87 | 57.03 | 73.87 | 78.60 | 87.30 | a | 76.71 | 67.14 | b | 57.58 | 44.00 | a | 21.16 | 55.27 | ||||||||||
1965 | 20.77 | 23.78 | a | 30.87 | 52.57 | 70.13 | 74.67 | 79.16 | 77.81 | 60.23 | 60.16 | 38.37 | 30.29 | 51.57 | ||||||||||||
1966 | 15.06 | 28.37 | a | 42.23 | 48.77 | 65.00 | c | 81.33 | 84.58 | 75.71 | 69.03 | a | 58.10 | 36.62 | a | 26.47 | a | 52.61 | ||||||||
1967 | 24.32 | 21.25 | 40.42 | 54.93 | 63.32 | ----- | z | 80.52 | d | 77.68 | 71.93 | 55.35 | 36.07 | 28.26 | 50.37 | a | ||||||||||
1968 | 22.60 | a | 26.76 | 49.48 | 57.10 | 64.29 | 76.17 | 81.32 | 80.23 | 69.70 | 60.16 | 39.70 | 24.55 | 54.34 | ||||||||||||
1969 | 19.58 | 29.14 | 37.61 | 58.40 | 71.80 | a | 70.93 | a | 81.55 | 85.52 | b | 71.60 | 52.90 | a | 41.00 | a | 27.84 | 53.99 | ||||||||
1970 | 16.17 | a | 27.04 | a | 38.42 | 56.30 | 66.37 | a | 81.40 | 86.23 | a | 83.68 | 69.90 | a | 56.66 | b | 37.33 | 24.32 | 53.65 | |||||||
1971 | 14.97 | 27.32 | 36.42 | 58.00 | 66.19 | 81.45 | a | 78.65 | 78.35 | 71.77 | 61.06 | 38.03 | 25.74 | 53.16 | ||||||||||||
1972 | 15.43 | a | 21.55 | 35.68 | 50.47 | 74.58 | 78.40 | 78.68 | 77.94 | 67.73 | 54.35 | 36.37 | 19.03 | 50.85 | ||||||||||||
1973 | 25.90 | b | 30.25 | 46.74 | 54.87 | 65.39 | 79.30 | 81.68 | 80.23 | 67.43 | 61.63 | a | 38.00 | 23.35 | 54.56 | |||||||||||
1974 | 19.10 | a | 27.04 | 36.20 | a | 56.23 | 61.27 | i | 76.62 | a | 87.00 | 76.13 | 64.14 | a | 57.71 | 41.73 | 30.71 | 52.06 | a | |||||||
1975 | 24.32 | 28.79 | 34.60 | a | 48.07 | 73.10 | a | 75.30 | 84.06 | ----- | z | 66.47 | 60.45 | 44.17 | 22.90 | 51.11 | a | |||||||||
1976 | 19.26 | 35.11 | a | 36.67 | a | 59.17 | a | 70.68 | 83.20 | 85.52 | b | ----- | z | 70.09 | g | 49.04 | c | 30.19 | i | 17.07 | a | 50.63 | c | |||
1977 | 11.55 | b | 31.43 | e | 43.57 | c | 61.60 | 78.54 | g | 79.00 | i | 85.35 | h | 73.26 | 64.77 | 56.67 | g | 38.07 | 22.96 | c | 43.40 | d | ||||
1978 | 14.97 | 22.25 | 38.23 | 52.43 | 71.19 | 74.97 | a | 75.77 | 77.16 | 71.27 | 55.74 | 37.87 | 21.07 | b | 51.08 | |||||||||||
1979 | 9.38 | b | 18.36 | 35.40 | a | 48.40 | 59.65 | 73.83 | 79.77 | 74.42 | 69.30 | 52.84 | 37.60 | 31.00 | a | 49.16 | ||||||||||
1980 | 19.26 | 22.79 | 33.65 | 57.17 | 73.23 | 75.07 | a | 82.81 | 76.61 | 64.57 | 50.55 | 39.20 | 22.59 | b | 51.46 | |||||||||||
1981 | 23.77 | 29.75 | 40.97 | 55.03 | 66.53 | a | 73.63 | 79.87 | 77.42 | 67.93 | 51.58 | 44.70 | 25.84 | 53.09 | ||||||||||||
1982 | 11.21 | b | 23.70 | a | 35.26 | 49.73 | 70.19 | 71.90 | 81.00 | 76.26 | 65.93 | 54.74 | 35.52 | a | 29.48 | 50.41 | ||||||||||
1983 | 24.84 | 31.36 | 37.97 | a | 47.60 | 63.03 | b | 74.80 | 83.13 | 82.19 | 68.50 | 54.65 | 37.80 | 12.35 | 51.52 | |||||||||||
1984 | 18.19 | 34.62 | 31.97 | 57.37 | 63.16 | 76.50 | 81.13 | 80.94 | 64.63 | 56.68 | 38.20 | 24.55 | 52.33 | |||||||||||||
1985 | 19.63 | a | 21.89 | 42.65 | 56.00 | 70.29 | 71.70 | 79.87 | 72.90 | 66.13 | 55.10 | 31.60 | 14.42 | 50.18 | ||||||||||||
1986 | 22.00 | 24.54 | 39.23 | a | 57.70 | 67.68 | 76.33 | 79.68 | 73.16 | 66.07 | 53.87 | 33.97 | a | 26.97 | 51.77 | |||||||||||
1987 | 25.68 | 37.04 | 46.03 | 64.40 | 70.61 | 81.07 | 83.48 | 77.58 | 70.70 | 49.03 | 43.40 | 29.16 | 56.52 | |||||||||||||
1988 | 17.42 | 21.34 | 37.32 | 56.14 | a | 75.29 | 82.27 | 86.81 | 79.68 | 68.57 | 50.32 | 36.80 | 24.84 | 53.07 | ||||||||||||
1989 | 26.16 | 16.43 | 32.74 | 50.50 | 66.23 | 73.50 | 82.84 | 78.16 | 69.67 | 57.90 | 34.20 | 14.81 | 50.26 | |||||||||||||
1990 | 30.87 | 29.39 | 41.19 | 54.57 | 63.48 | 75.90 | 78.58 | 79.06 | 69.00 | 55.10 | 42.87 | 26.14 | b | 53.85 | ||||||||||||
1991 | 19.00 | a | 32.30 | a | 40.32 | 57.30 | 69.42 | 77.83 | 77.42 | 80.48 | 64.33 | 52.42 | 28.80 | 26.81 | 52.20 | |||||||||||
1992 | 25.52 | 31.64 | a | 37.37 | a | 46.47 | 70.81 | 72.93 | 72.19 | 72.87 | 66.67 | 53.74 | 34.93 | 26.71 | 50.99 | |||||||||||
1993 | 21.77 | 25.36 | 40.58 | 48.27 | 63.74 | 70.30 | 76.45 | 79.06 | 61.60 | 52.61 | 34.00 | 24.97 | 49.89 | |||||||||||||
1994 | 9.97 | 18.86 | 39.23 | 51.87 | 69.29 | 76.90 | 77.58 | 74.81 | 69.66 | a | 57.32 | 42.80 | 30.29 | 51.55 | ||||||||||||
1995 | 21.97 | 24.04 | 39.48 | 45.37 | 65.29 | 80.70 | 79.06 | 79.13 | 66.70 | 53.32 | 28.37 | 21.74 | 50.43 | |||||||||||||
1996 | 16.23 | 22.45 | 29.84 | 46.93 | 64.16 | 75.43 | 75.97 | 79.35 | 66.90 | 55.97 | 30.37 | 22.16 | 48.81 | |||||||||||||
1997 | 17.35 | 27.39 | 35.65 | 51.63 | 59.13 | 79.83 | 77.84 | 72.81 | 69.37 | 56.50 | a | 34.80 | 32.29 | 51.22 | ||||||||||||
1998 | 24.26 | 38.68 | 37.29 | 59.20 | 75.68 | 73.20 | 81.10 | 81.58 | 75.43 | ----- | z | 41.83 | 29.81 | 56.19 | a | |||||||||||
1999 | 17.74 | 34.11 | 42.58 | 55.40 | 70.52 | 74.63 | 82.58 | 75.87 | 69.17 | 54.87 | 47.57 | 28.97 | a | 54.50 | ||||||||||||
2000 | 21.84 | 33.38 | 47.42 | 52.53 | 70.03 | a | 73.10 | 78.32 | 77.97 | a | 68.30 | 59.87 | 37.67 | 14.66 | b | 52.92 | ||||||||||
2001 | 26.23 | 20.61 | 37.19 | 52.47 | 67.52 | 76.07 | 81.00 | 81.77 | 68.87 | 55.65 | 51.83 | 31.58 | 54.23 | |||||||||||||
2002 | 29.13 | 34.39 | 31.81 | 50.93 | 61.77 | 77.60 | 83.84 | 77.48 | 71.50 | 47.42 | 36.43 | 29.43 | a | 52.65 | ||||||||||||
2003 | 19.35 | 21.96 | 36.48 | 52.80 | 67.58 | 74.33 | 79.39 | 82.29 | 72.23 | 56.84 | 36.90 | 30.00 | 52.51 | |||||||||||||
2004 | 17.90 | a | 28.31 | 40.58 | 55.37 | 62.77 | 71.83 | 77.68 | 71.52 | 74.17 | 57.58 | 43.67 | 25.65 | 52.25 | ||||||||||||
2005 | 18.03 | 32.71 | 38.39 | 60.77 | 62.19 | 80.07 | 83.16 | 80.48 | 74.50 | 58.74 | 41.83 | 24.35 | 54.60 | |||||||||||||
2006 | 32.06 | 24.96 | 40.48 | 62.13 | 67.90 | 78.37 | 87.81 | 79.35 | 68.13 | 51.68 | 41.40 | 32.00 | 55.52 | |||||||||||||
2007 | 25.23 | 19.21 | 43.35 | 54.83 | 71.81 | 81.63 | 83.45 | 80.42 | 71.53 | 60.03 | 39.15 | c | 22.23 | 54.41 | ||||||||||||
2008 | 21.19 | 22.69 | 36.03 | 49.70 | 64.10 | 73.97 | 80.94 | 79.65 | 70.23 | 56.10 | 39.13 | 19.42 | 51.10 | |||||||||||||
2009 | 13.61 | 27.68 | 38.16 | 53.73 | 68.00 | 74.60 | 74.68 | 75.52 | 75.53 | 47.68 | 47.50 | 21.23 | 51.49 | |||||||||||||
2010 | 20.26 | 29.00 | 49.26 | 63.63 | 70.39 | 73.63 | 81.74 | 80.94 | 65.03 | 60.16 | 39.93 | 21.90 | 54.66 | |||||||||||||
2011 | 16.00 | 25.04 | 36.13 | 51.43 | 64.39 | 73.87 | 83.97 | 79.58 | 68.23 | 61.26 | 43.00 | 28.77 | 52.64 | |||||||||||||
2012 | 25.45 | 32.69 | 53.03 | 55.45 | a | 67.87 | 75.97 | 85.71 | 78.63 | a | 70.57 | 53.35 | 39.80 | 27.58 | 55.51 | |||||||||||
2013 | 21.00 | 23.21 | 33.32 | 42.50 | 61.71 | 71.43 | 77.71 | 78.29 | 69.33 | 53.55 | b | 34.62 | d | 14.13 | 48.40 | |||||||||||
2014 | 11.06 | 15.61 | 29.48 | 44.50 | 64.68 | 76.40 | 76.87 | 76.45 | 67.90 | 54.35 | 29.53 | 26.52 | 47.78 | |||||||||||||
2015 | 20.32 | 15.21 | 41.26 | 55.53 | 66.58 | 75.37 | 80.26 | 75.90 | 73.87 | 56.55 | 45.57 | 32.65 | 53.26 | |||||||||||||
2016 | 19.77 | 27.76 | 42.55 | 50.63 | 68.94 | 76.27 | 80.87 | 78.94 | 69.83 | 57.67 | a | 48.57 | 23.35 | 53.76 | ||||||||||||
2017 | 23.81 | 33.36 | 37.06 | 53.50 | 63.53 | a | 76.13 | 79.23 | 72.77 | 71.67 | 57.10 | 34.43 | 19.87 | 51.87 | ||||||||||||
2018 | 19.90 | 21.64 | 38.16 | 43.17 | 75.13 | 77.20 | 81.23 | 78.65 | 68.50 | 48.13 | 29.53 | 27.87 | 50.76 | |||||||||||||
2019 | 17.19 | 18.68 | 33.97 | 49.63 | 60.90 | 76.43 | 81.81 | 76.80 | a | 68.93 | 50.16 | 30.70 | 24.97 | 49.18 | ||||||||||||
2020 | 24.42 | 26.90 | 40.10 | 50.69 | a | 65.77 | 79.00 | 82.94 | 78.52 | 66.13 | 46.84 | 42.34 | a | 28.00 | 52.64 | |||||||||||
2021 | 24.65 | 17.71 | 44.87 | 51.13 | 65.65 | 81.87 | 82.42 | 80.45 | 72.90 | 60.97 | 39.67 | 28.10 | 54.20 | |||||||||||||
2022 | 14.26 | 19.82 | 35.32 | 44.33 | 66.52 | 77.57 | 80.97 | 77.65 | 71.27 | 57.23 | 39.17 | 21.23 | 50.44 | |||||||||||||
2023 | 24.13 | 26.96 | 34.42 | 48.46 | b | 69.71 | 81.17 | 78.58 | 77.94 | 72.67 | 55.58 | 40.30 | 35.65 | 53.80 | ||||||||||||
2024 | 22.84 | 38.38 | 41.87 | 50.75 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.36 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 20.58 | 26.78 | 38.68 | 53.62 | 67.57 | 76.67 | 81.13 | 78.45 | 69.09 | 55.96 | 38.91 | 25.33 | 52.48 | |||||||||||||
S.D. | 5.04 | 5.66 | 4.59 | 5.01 | 4.01 | 3.21 | 3.27 | 3.03 | 3.10 | 4.30 | 5.03 | 4.94 | 1.93 | |||||||||||||
SKEW | -0.07 | 0.08 | 0.62 | -0.02 | 0.00 | 0.07 | -0.09 | -0.02 | -0.21 | 0.22 | -0.01 | -0.55 | -0.31 | |||||||||||||
MAX | 32.06 | 38.68 | 53.03 | 64.40 | 75.68 | 83.20 | 87.81 | 86.35 | 75.53 | 70.03 | 51.83 | 35.65 | 56.52 | |||||||||||||
MIN | 9.38 | 15.21 | 29.48 | 42.50 | 59.13 | 70.30 | 72.19 | 71.52 | 60.23 | 46.84 | 28.37 | 12.35 | 47.78 | |||||||||||||
YRS | 73 | 73 | 73 | 72 | 70 | 68 | 71 | 69 | 70 | 69 | 72 | 73 | 61 |