YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.23 | q | 47.54 | g | 39.28 | 14.87 | 27.08 | j | ||
1950 | -2.40 | 12.21 | 25.24 | 36.04 | c | 53.03 | a | 65.97 | a | 67.64 | c | 66.70 | a | 60.13 | 48.39 | c | 22.29 | d | 12.20 | a | 38.95 | |||||
1951 | 5.85 | a | 17.28 | a | 17.97 | a | 42.52 | b | 58.06 | 60.52 | b | 69.23 | 66.57 | b | 56.70 | c | 45.27 | a | 26.18 | 6.52 | e | 39.39 | ||||
1952 | 5.46 | e | 18.33 | b | 20.78 | b | 47.10 | 56.29 | c | 68.80 | b | 71.74 | b | 70.42 | 63.90 | 43.58 | a | 32.83 | a | 17.98 | f | 45.38 | a | |||
1953 | 13.20 | a | 17.96 | b | 29.85 | a | 39.41 | b | 55.11 | 68.96 | f | 70.56 | 71.77 | 60.83 | 53.62 | a | 34.39 | c | 19.20 | a | 42.36 | a | ||||
1954 | 2.38 | b | 32.65 | b | 26.50 | d | 44.00 | 50.52 | c | 64.86 | a | 74.82 | c | 69.65 | a | 59.70 | j | 46.39 | h | 37.15 | c | 20.26 | d | 42.28 | b | |
1955 | 14.12 | a | 10.35 | d | 25.80 | f | 52.69 | c | 62.26 | b | 64.75 | 75.43 | a | 73.35 | a | 60.31 | f | 49.30 | d | 18.83 | 6.42 | e | 42.75 | b | ||
1956 | 8.35 | e | 7.79 | 23.79 | 37.82 | 56.83 | a | 72.29 | a | 69.42 | 70.19 | 58.55 | 51.91 | d | 31.30 | 22.77 | a | 42.58 | ||||||||
1957 | 5.21 | 16.60 | b | 29.47 | 44.28 | 55.21 | 63.83 | 76.28 | a | 70.32 | a | 57.50 | a | 46.97 | a | 31.57 | 25.55 | 43.57 | ||||||||
1958 | 19.61 | 13.93 | 30.65 | 46.20 | e | 59.80 | d | 60.69 | a | 68.35 | a | 72.88 | a | 63.77 | 48.89 | d | 33.69 | a | 14.68 | 44.43 | ||||||
1959 | 8.09 | b | 9.02 | 33.74 | 45.64 | a | 56.25 | c | 70.97 | 73.03 | 74.67 | a | 57.73 | f | 42.15 | g | 23.82 | b | 26.61 | h | 43.91 | c | ||||
1960 | 10.80 | a | 11.17 | 16.08 | 43.95 | 56.42 | 63.93 | 73.31 | 71.39 | 61.30 | 48.45 | 31.23 | 13.37 | e | 41.78 | |||||||||||
1961 | 10.52 | b | 18.25 | 35.37 | 40.21 | a | 53.03 | 69.05 | 69.48 | 73.16 | c | 54.55 | h | 47.95 | i | 30.74 | a | 10.70 | i | 44.42 | c | |||||
1962 | 8.96 | g | 11.94 | c | 23.37 | 44.34 | a | 58.06 | 65.62 | a | 67.92 | a | 71.06 | o | 56.72 | u | 48.63 | d | 34.19 | d | 20.81 | d | 41.65 | c | ||
1963 | 1.93 | b | 14.96 | a | 36.02 | c | 46.42 | 55.90 | a | 69.62 | 71.36 | i | 69.25 | i | 62.66 | a | 56.55 | 34.38 | 10.10 | 38.85 | b | |||||
1964 | 16.24 | 23.88 | 23.39 | 46.43 | 58.42 | e | 67.95 | h | 74.76 | 68.13 | 58.78 | 48.33 | a | 28.68 | 6.98 | 41.28 | a | |||||||||
1965 | 3.05 | 11.18 | 19.05 | 43.22 | 57.34 | 65.63 | 71.61 | 70.47 | 51.18 | b | 51.05 | 30.95 | 24.79 | 41.63 | ||||||||||||
1966 | -0.25 | a | 9.55 | 33.98 | 38.34 | a | 53.79 | 65.83 | 76.23 | a | 68.57 | d | 61.04 | g | 47.03 | b | 24.87 | c | 18.18 | f | 41.80 | b | ||||
1967 | 11.77 | g | 8.63 | i | 32.48 | b | 44.07 | g | 52.58 | f | 65.44 | e | 71.33 | g | 69.06 | d | 62.71 | i | 41.18 | q | 31.88 | 17.24 | 43.22 | g | ||
1968 | 11.31 | 14.55 | a | 37.21 | 45.23 | 52.88 | b | 66.25 | 70.55 | 69.53 | 60.47 | 47.77 | a | 32.52 | 11.65 | a | 43.33 | |||||||||
1969 | 2.26 | 15.83 | b | 17.08 | 46.45 | 59.27 | 60.65 | 70.84 | 73.94 | 62.98 | a | 43.02 | a | 33.57 | 18.77 | 42.05 | ||||||||||
1970 | 2.18 | 15.89 | 22.08 | 42.55 | 57.95 | 70.13 | 73.98 | 72.71 | 62.88 | 47.35 | 28.31 | a | 13.77 | 42.48 | ||||||||||||
1971 | 3.39 | 13.00 | 30.13 | 47.23 | 54.84 | 69.05 | 68.69 | 71.97 | k | 60.78 | 48.93 | a | 30.93 | 12.00 | 39.91 | a | ||||||||||
1972 | 4.42 | 7.28 | 25.73 | 42.80 | 59.81 | 66.60 | 69.45 | 71.73 | 60.23 | 44.95 | 29.45 | 8.02 | 40.87 | |||||||||||||
1973 | 15.44 | 22.80 | 37.13 | 44.75 | 57.10 | 68.42 | 72.30 | a | 74.88 | c | 57.93 | g | 51.75 | c | 29.00 | b | 14.08 | 44.33 | a | |||||||
1974 | 7.23 | 16.21 | 29.27 | 46.05 | 55.05 | 65.88 | 76.77 | 68.18 | a | 58.15 | 50.65 | 32.12 | ----- | z | 45.96 | a | ||||||||||
1975 | 15.50 | n | 13.41 | k | 20.91 | i | 36.02 | g | 57.29 | j | 65.90 | d | 75.79 | 69.92 | 57.34 | b | 49.32 | 32.77 | 17.35 | 52.63 | e | |||||
1976 | 9.77 | 24.81 | 28.17 | b | 48.35 | ----- | z | 69.60 | 75.25 | a | 74.16 | b | 61.92 | 41.59 | b | 36.33 | x | 13.90 | f | 48.18 | c | |||||
1977 | 1.12 | c | 24.00 | a | 32.87 | 52.77 | 65.68 | c | 68.05 | 74.80 | a | 65.82 | a | 59.50 | j | 48.86 | q | 29.44 | l | 10.47 | m | 48.14 | d | |||
1978 | -4.08 | r | 8.50 | n | 25.61 | m | 44.25 | n | 60.58 | m | 66.55 | k | 71.88 | e | 72.40 | 66.48 | 48.89 | 25.66 | a | 11.60 | 49.49 | f | ||||
1979 | -0.42 | 2.25 | 24.50 | 38.15 | 52.21 | 65.83 | 71.29 | 67.12 | c | 63.90 | 46.61 | 28.60 | 26.08 | a | 40.51 | |||||||||||
1980 | 11.39 | c | 14.29 | 25.19 | 48.22 | 61.06 | 66.90 | 73.34 | 69.64 | b | 61.18 | 46.31 | 35.00 | a | 18.60 | 44.26 | ||||||||||
1981 | 16.08 | 21.34 | 34.79 | 48.93 | 55.71 | 64.14 | a | 72.52 | 70.19 | 59.78 | 45.89 | 36.52 | 13.08 | 44.91 | ||||||||||||
1982 | -3.34 | 12.74 | a | 25.95 | 42.23 | 57.31 | 61.65 | 74.02 | 69.89 | 58.19 | a | 45.68 | 25.42 | 22.42 | 41.01 | |||||||||||
1983 | 20.05 | 24.96 | 30.48 | 40.83 | a | 52.89 | 65.33 | 74.89 | c | 75.44 | 58.55 | 45.26 | 29.10 | a | -0.37 | d | 43.12 | |||||||||
1984 | 13.31 | 26.50 | 24.36 | b | 43.40 | a | 53.57 | a | 64.97 | 70.97 | a | 71.66 | 52.88 | 45.52 | 29.40 | 10.29 | b | 42.23 | ||||||||
1985 | 4.40 | 11.91 | a | 33.10 | 48.05 | a | 60.87 | 60.97 | a | 70.45 | 64.48 | 53.53 | 44.31 | 13.68 | 6.17 | a | 39.33 | |||||||||
1986 | 13.61 | 9.02 | 31.95 | a | 41.86 | a | 56.94 | 66.55 | 70.37 | 65.10 | 55.37 | 45.40 | 24.17 | 23.40 | a | 41.98 | ||||||||||
1987 | 21.16 | 28.57 | 31.26 | b | 51.78 | 61.16 | 69.93 | b | 74.48 | 65.93 | a | 59.89 | b | 41.71 | 33.07 | 22.65 | 46.80 | |||||||||
1988 | 9.69 | e | 12.69 | 31.48 | 45.47 | 62.27 | 74.28 | 74.19 | 70.23 | 57.16 | a | 42.48 | a | 27.37 | 16.82 | 43.68 | ||||||||||
1989 | 13.03 | 2.38 | 21.55 | 43.52 | 57.48 | 64.92 | 75.02 | 69.87 | 58.45 | 45.00 | 26.20 | 5.84 | 40.27 | |||||||||||||
1990 | 23.18 | 20.26 | a | 33.55 | 42.52 | 54.68 | 65.83 | 69.10 | 69.02 | 61.90 | 43.58 | 32.35 | 10.57 | a | 43.88 | |||||||||||
1991 | 8.87 | 24.36 | 31.42 | 47.33 | 59.87 | 69.03 | a | 70.06 | 70.98 | 58.32 | 42.27 | 22.57 | 21.27 | 43.86 | ||||||||||||
1992 | 19.32 | 26.09 | 33.85 | 43.18 | 58.65 | 62.48 | 63.84 | 63.50 | 56.92 | 44.06 | 26.97 | 11.06 | 42.49 | |||||||||||||
1993 | 6.32 | 8.43 | 26.37 | 42.23 | 55.35 | 61.00 | 65.85 | 66.85 | 53.10 | 41.95 | 25.00 | 14.68 | 38.93 | |||||||||||||
1994 | -3.47 | 3.61 | 30.08 | 43.63 | 60.35 | 67.43 | 66.95 | 65.06 | 59.88 | 47.77 | 32.20 | 15.65 | 40.76 | |||||||||||||
1995 | 10.84 | 14.11 | 25.63 | 38.30 | 53.89 | 67.67 | 70.69 | 71.81 | 57.17 | 43.66 | 24.85 | 15.24 | 41.15 | |||||||||||||
1996 | 0.84 | 15.84 | 19.66 | 39.22 | 53.16 | 67.18 | 68.08 | 70.21 | 58.37 | 43.44 | 16.88 | 5.29 | 38.18 | |||||||||||||
1997 | 2.32 | 14.21 | 22.76 | 38.98 | b | 53.65 | 68.30 | 70.31 | 68.55 | 61.07 | 46.92 | 23.85 | 23.89 | 41.23 | ||||||||||||
1998 | 12.31 | 26.70 | 24.00 | 47.98 | 59.40 | 62.72 | 72.21 | 70.27 | 62.77 | 46.92 | 31.75 | 21.21 | 44.85 | |||||||||||||
1999 | 7.45 | 25.50 | 33.73 | 45.02 | 57.56 | 65.38 | 71.97 | 69.08 | 54.80 | 44.53 | 38.28 | a | 25.42 | a | 44.89 | |||||||||||
2000 | 12.92 | 24.26 | 36.82 | 42.85 | 57.71 | 64.63 | 71.27 | 68.92 | 58.88 | 48.27 | 22.15 | 2.69 | 42.62 | |||||||||||||
2001 | 14.61 | 5.07 | 23.16 | 43.40 | 58.90 | 66.32 | 73.63 | 70.87 | 59.88 | 47.11 | i | 38.63 | 18.55 | 43.00 | a | |||||||||||
2002 | 18.11 | 25.64 | 20.34 | 41.10 | 51.65 | 70.60 | 74.31 | 67.68 | 61.05 | 36.53 | 30.15 | 20.85 | 43.17 | |||||||||||||
2003 | 11.90 | 10.41 | 26.90 | 44.98 | 55.08 | 64.95 | 70.89 | 72.05 | 57.27 | 48.26 | 24.27 | 21.35 | 42.36 | |||||||||||||
2004 | 7.03 | 16.59 | 34.00 | 44.58 | 53.16 | 61.55 | 67.75 | a | 62.89 | 60.62 | 45.85 | 33.93 | 21.92 | 42.49 | ||||||||||||
2005 | 8.27 | a | 21.04 | 28.79 | 47.37 | 53.00 | 67.92 | 71.34 | 67.58 | 63.27 | 47.71 | 33.13 | 17.16 | 43.88 | ||||||||||||
2006 | 23.90 | 17.32 | 30.21 | 48.42 | 56.71 | 66.17 | a | 75.27 | 70.45 | 55.43 | 42.50 | 30.95 | 24.18 | 45.13 | ||||||||||||
2007 | 11.13 | 7.25 | 33.66 | 40.70 | 60.77 | 68.48 | 74.08 | 67.77 | 60.23 | 49.10 | 31.53 | 11.35 | 43.01 | |||||||||||||
2008 | 7.76 | 9.31 | 27.55 | 40.07 | 53.81 | 64.57 | 72.50 | 70.44 | 60.18 | 46.21 | 32.22 | 8.66 | 41.11 | |||||||||||||
2009 | 4.97 | 14.36 | 23.68 | 41.80 | 55.27 | 63.30 | 67.00 | 66.85 | 63.38 | 40.56 | 38.38 | 11.76 | 40.94 | |||||||||||||
2010 | 7.82 | 10.25 | 32.94 | 51.08 | 56.58 | 67.38 | 72.76 | 72.97 | 57.57 | 50.11 | 30.53 | 12.27 | 43.52 | |||||||||||||
2011 | 5.16 | 10.21 | 20.19 | 41.83 | 54.29 | 65.53 | 76.11 | 70.45 | 59.53 | 50.60 | 31.87 | 23.94 | 42.48 | |||||||||||||
2012 | 20.84 | 22.60 | 41.11 | d | 47.08 | e | 58.89 | 69.13 | 76.47 | 68.35 | 58.92 | 43.56 | 30.00 | 15.31 | 46.02 | |||||||||||
2013 | 13.56 | 12.82 | 17.48 | 32.20 | 55.98 | 65.53 | 71.56 | 71.35 | 65.03 | 43.61 | 28.65 | 7.73 | 40.46 | |||||||||||||
2014 | 7.73 | 6.89 | 24.65 | 40.88 | 56.40 | 65.80 | 69.15 | 70.00 | 60.22 | 48.92 | 21.13 | 20.02 | 40.98 | |||||||||||||
2015 | 16.97 | 7.77 | 32.42 | 46.45 | 54.92 | 68.05 | 72.05 | 69.85 | 64.20 | 49.98 | 36.57 | 21.55 | 45.06 | |||||||||||||
2016 | 15.18 | 25.71 | 38.61 | 43.47 | 58.44 | 68.30 | 71.23 | 69.63 | 61.23 | 48.63 | 40.85 | 13.69 | 46.25 | |||||||||||||
2017 | 13.18 | 25.70 | 29.63 | 45.42 | k | 56.02 | 67.35 | 73.39 | 66.40 | 61.13 | 47.37 | 29.53 | 18.55 | 44.39 | a | |||||||||||
2018 | ----- | z | 7.70 | a | 27.44 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 17.57 | j | |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.21 | g | 27.47 | 16.24 | 21.85 | j | ||
2020 | 11.97 | 15.31 | 29.29 | 40.18 | 53.39 | 69.95 | 73.68 | 71.26 | 57.75 | 38.81 | 33.90 | 23.06 | 43.21 | |||||||||||||
2021 | 21.29 | 8.23 | 35.20 | a | 39.87 | 54.50 | 71.53 | 73.10 | 69.85 | 62.22 | 50.05 | 34.42 | 18.32 | 44.88 | ||||||||||||
2022 | 7.61 | 10.41 | 27.76 | 36.13 | 55.39 | 68.72 | 72.68 | 69.39 | 62.55 | 55.43 | x | ----- | z | ----- | z | 45.63 | c | |||||||||
2023 | 12.18 | l | 11.43 | 14.21 | 33.62 | 61.44 | 72.08 | 69.15 | 69.35 | 63.35 | 46.63 | 33.33 | a | 27.87 | 45.68 | a | ||||||||||
2024 | 13.02 | 28.74 | 28.76 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.51 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 9.72 | 15.67 | 28.14 | 43.58 | 56.61 | 66.50 | 71.86 | 69.71 | 59.74 | 46.53 | 29.99 | 15.90 | 42.54 | |||||||||||||
S.D. | 6.61 | 7.19 | 5.93 | 4.18 | 2.98 | 2.99 | 2.82 | 2.66 | 3.11 | 3.49 | 5.27 | 6.44 | 2.00 | |||||||||||||
SKEW | 0.10 | 0.31 | -0.23 | -0.19 | 0.47 | 0.01 | -0.36 | -0.26 | -0.46 | -0.10 | -0.58 | -0.28 | -0.05 | |||||||||||||
MAX | 23.90 | 32.65 | 41.11 | 52.77 | 65.68 | 74.28 | 76.77 | 75.44 | 66.48 | 56.55 | 40.85 | 27.87 | 46.80 | |||||||||||||
MIN | -3.47 | 2.25 | 14.21 | 32.20 | 50.52 | 60.52 | 63.84 | 62.89 | 51.18 | 36.53 | 13.68 | -0.37 | 38.18 | |||||||||||||
YRS | 68 | 71 | 71 | 68 | 68 | 69 | 70 | 69 | 63 | 65 | 71 | 66 | 50 |