YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.05 | a | 54.13 | 46.98 | a | ----- | z | 15.18 | c | 45.59 | h | |
1944 | 17.62 | a | 6.48 | 16.27 | 36.28 | 53.85 | 61.73 | 65.39 | 65.45 | 56.02 | 46.61 | 32.02 | 11.95 | 39.14 | ||||||||||||
1945 | 6.23 | a | 9.93 | 30.02 | 35.68 | 45.35 | 57.47 | 65.00 | 64.90 | 53.17 | 43.69 | 23.91 | a | 6.68 | 36.84 | |||||||||||
1946 | 7.79 | 3.88 | 32.63 | 42.55 | 50.82 | 61.47 | a | 68.24 | 64.03 | 55.40 | 43.47 | 26.53 | 9.85 | 38.89 | ||||||||||||
1947 | 8.55 | a | 3.32 | 17.69 | 35.25 | 47.19 | 59.72 | 71.11 | d | 71.00 | 55.73 | 52.32 | 22.25 | 9.34 | 37.79 | |||||||||||
1948 | 1.16 | 4.24 | 20.13 | 39.47 | 52.87 | 61.90 | 68.11 | 67.29 | 62.58 | 46.81 | 30.21 | a | 10.85 | 38.80 | ||||||||||||
1949 | 6.09 | c | 0.44 | a | 15.27 | c | 39.32 | e | 54.02 | 64.35 | 68.45 | 68.68 | 53.45 | 44.33 | a | 31.25 | 9.53 | 37.93 | ||||||||
1950 | -7.82 | 3.96 | a | 15.16 | 29.18 | 46.50 | a | 60.38 | 65.94 | 61.66 | 57.52 | a | 45.37 | a | 22.66 | b | 3.97 | a | 33.71 | |||||||
1951 | -1.50 | e | 9.96 | c | 16.18 | c | 35.45 | 55.35 | a | 59.38 | b | 66.36 | c | 61.82 | 52.93 | b | 42.31 | 20.50 | 6.06 | 35.40 | ||||||
1952 | 2.12 | b | 16.88 | 18.42 | e | 44.00 | a | 52.74 | b | 64.00 | 67.28 | d | 64.85 | a | 57.65 | 40.10 | 29.47 | a | 19.30 | a | 39.73 | |||||
1953 | 8.16 | 8.20 | 24.32 | 36.22 | 52.87 | 62.87 | 66.42 | 68.71 | 55.42 | 51.95 | 34.35 | 12.95 | a | 40.20 | ||||||||||||
1954 | -3.40 | 22.89 | a | 19.97 | b | 35.88 | 46.24 | 63.12 | 67.75 | a | 63.83 | a | 53.30 | e | 42.83 | a | 32.07 | b | 19.38 | a | 38.66 | |||||
1955 | 4.84 | 3.56 | a | 12.43 | a | 46.80 | b | 58.29 | j | 64.88 | d | 71.68 | a | 69.48 | a | 56.22 | a | 45.61 | c | 17.52 | h | 2.86 | c | 37.84 | b | |
1956 | 5.72 | h | 3.12 | m | 19.02 | g | 33.05 | a | 50.90 | f | 67.82 | 64.91 | c | 65.52 | 51.98 | c | 50.41 | b | 28.55 | j | 12.15 | u | 55.62 | f | ||
1957 | -5.53 | p | 4.43 | u | 20.26 | b | 36.50 | b | 51.71 | g | 58.77 | d | 70.40 | e | 65.36 | f | 53.38 | d | 45.63 | 27.38 | j | 12.61 | i | 47.49 | f | |
1958 | 15.56 | g | 7.54 | b | 27.79 | 43.07 | 52.56 | 57.20 | 64.37 | 65.13 | 56.83 | 45.42 | 27.97 | a | 3.67 | a | 41.05 | a | ||||||||
1959 | -2.68 | c | 3.30 | 22.76 | 37.76 | a | 53.13 | 64.31 | c | 68.02 | 68.40 | 55.43 | 39.02 | 15.73 | 20.40 | 37.13 | ||||||||||
1960 | 6.39 | 8.41 | 13.10 | 36.98 | a | 51.55 | 60.67 | 68.40 | 68.10 | a | 57.18 | 45.92 | a | 29.87 | 8.47 | 37.92 | ||||||||||
1961 | 3.85 | a | 16.86 | 29.21 | 33.34 | a | 49.94 | 65.85 | 67.71 | 69.32 | a | 54.87 | 45.89 | 27.67 | 9.13 | 39.47 | ||||||||||
1962 | 0.32 | 3.93 | 22.34 | 34.57 | 52.52 | 62.38 | 63.85 | 64.97 | a | 53.78 | 48.26 | 33.15 | 13.05 | 37.76 | ||||||||||||
1963 | -4.71 | c | 3.73 | 25.19 | 41.63 | 50.44 | 65.39 | h | 70.24 | h | 63.46 | e | 58.45 | h | 55.65 | h | 33.73 | h | 2.91 | c | 26.09 | e | ||||
1964 | 11.06 | g | 10.39 | j | 13.47 | n | 38.12 | j | 55.45 | l | 58.38 | j | 68.76 | l | 60.46 | g | ----- | z | ----- | z | 31.26 | k | 4.59 | i | ----- | z |
1965 | -1.32 | c | 4.38 | b | 11.60 | a | 38.58 | 51.77 | 61.13 | 65.33 | a | 64.50 | 47.34 | a | 45.29 | 25.15 | 19.23 | 36.08 | ||||||||
1966 | -9.82 | 2.07 | 27.40 | a | 34.81 | a | 46.71 | b | 63.30 | 70.77 | c | 63.34 | b | 56.76 | e | 41.54 | c | 22.07 | c | 9.15 | 35.67 | |||||
1967 | 5.53 | a | -0.07 | a | 22.95 | 34.39 | c | 46.03 | 60.32 | 66.10 | b | 64.73 | 58.07 | a | 42.52 | 26.38 | 14.10 | 36.75 | ||||||||
1968 | 3.52 | a | 4.71 | 28.39 | 39.45 | a | 49.85 | a | 61.20 | 65.25 | a | 63.95 | 56.23 | 44.92 | 29.23 | 8.26 | 37.91 | |||||||||
1969 | -2.35 | 11.14 | 16.89 | 41.72 | a | 53.15 | a | 55.10 | 66.45 | 69.92 | 57.22 | 38.77 | 28.53 | 15.79 | 37.69 | |||||||||||
1970 | -1.21 | 7.75 | 15.06 | 36.14 | a | 47.82 | 65.85 | 70.68 | a | 65.71 | b | 56.07 | b | 43.81 | 26.78 | 4.18 | 36.55 | |||||||||
1971 | -5.93 | a | 7.73 | 21.03 | 39.13 | 50.50 | 65.10 | 63.28 | a | 65.47 | 56.25 | 46.97 | 27.43 | b | 9.35 | 37.19 | ||||||||||
1972 | -3.35 | 0.86 | 19.97 | 36.28 | 57.73 | 62.64 | a | 64.15 | 66.66 | 52.03 | 39.77 | a | 26.21 | b | 4.33 | a | 35.61 | |||||||||
1973 | 10.18 | a | 10.50 | 33.23 | 38.29 | a | 51.90 | 63.57 | 66.60 | 68.85 | 54.38 | 50.15 | 26.37 | 9.15 | a | 40.26 | ||||||||||
1974 | 1.08 | 7.86 | 18.12 | a | 38.35 | 47.53 | 62.22 | 70.66 | 63.00 | a | 51.00 | a | 44.98 | 29.26 | a | 19.66 | 37.81 | |||||||||
1975 | 8.06 | 7.00 | a | 15.65 | 32.45 | 54.08 | 61.22 | 71.16 | 64.56 | 53.30 | 46.45 | 30.98 | 9.40 | 37.86 | ||||||||||||
1976 | 1.84 | 17.77 | a | 18.40 | a | 44.12 | 53.08 | 66.28 | 68.29 | 67.23 | 56.90 | 37.60 | 21.95 | 1.50 | 37.91 | |||||||||||
1977 | -5.73 | 13.16 | 29.20 | c | 42.95 | 64.17 | a | 64.35 | 68.56 | 59.11 | 54.48 | 44.53 | a | 24.63 | 4.18 | a | 38.63 | |||||||||
1978 | -1.31 | 2.29 | 20.06 | 37.45 | 56.68 | 61.18 | 66.45 | 66.34 | 58.50 | ----- | z | 22.62 | 3.95 | 35.84 | a | |||||||||||
1979 | -7.61 | -1.36 | 20.93 | a | 33.33 | a | 44.97 | 59.53 | 68.37 | a | 62.10 | 55.63 | 39.89 | ----- | z | 16.66 | 35.68 | a | ||||||||
1980 | 1.60 | 6.66 | 15.27 | 44.02 | 59.18 | a | 62.63 | 67.97 | 63.00 | 52.82 | 39.15 | 29.17 | 8.60 | 37.50 | ||||||||||||
1981 | 8.84 | 15.73 | 29.47 | 41.47 | 53.65 | 61.53 | 69.00 | 67.15 | 55.27 | 41.58 | 35.63 | 11.77 | 40.92 | |||||||||||||
1982 | -9.79 | b | 7.23 | 20.00 | a | 35.90 | a | 55.85 | 57.22 | a | 68.21 | b | 64.82 | 55.53 | a | 45.66 | 23.90 | 19.09 | b | 36.97 | ||||||
1983 | 13.42 | a | 17.30 | 27.84 | 38.08 | 49.28 | a | 62.58 | 71.81 | 71.81 | 54.20 | e | 43.48 | a | 30.40 | -1.65 | a | 39.88 | ||||||||
1984 | 4.77 | 22.16 | 19.90 | b | 42.92 | 49.85 | a | 64.12 | 68.79 | 70.92 | 52.55 | a | 45.63 | a | 27.13 | 7.65 | 39.70 | |||||||||
1985 | 2.73 | 4.46 | 27.68 | a | 42.18 | 57.25 | a | 57.63 | 66.55 | 61.52 | b | 52.65 | 43.26 | 18.02 | a | 1.89 | 36.32 | |||||||||
1986 | 11.45 | c | 8.22 | a | 27.19 | 41.84 | a | 55.40 | 63.20 | 69.10 | 63.77 | e | 55.38 | a | 44.60 | a | 21.53 | 17.79 | b | 39.96 | ||||||
1987 | 12.84 | 24.70 | a | 30.41 | c | 48.48 | a | 57.18 | 66.68 | 69.15 | a | 64.25 | a | 57.83 | 40.63 | a | 32.45 | a | 21.20 | c | 43.82 | |||||
1988 | 0.81 | 4.68 | a | 22.65 | 40.40 | 60.39 | 69.97 | ----- | z | 67.69 | 55.57 | 40.53 | 26.39 | b | 11.69 | 36.43 | a | |||||||||
1989 | 10.79 | -2.48 | c | 19.58 | a | 35.72 | a | 54.53 | 61.93 | 72.39 | ----- | z | 54.58 | j | 45.19 | 20.95 | b | 1.32 | a | 31.99 | b | |||||
1990 | 16.52 | 11.85 | b | 26.77 | a | 38.86 | b | 50.03 | a | 65.50 | 68.77 | a | 70.56 | 61.00 | 41.19 | 29.07 | 10.71 | b | 40.90 | |||||||
1991 | 2.52 | 17.63 | a | 27.13 | a | 42.83 | a | 59.76 | b | 66.71 | a | 67.03 | 70.23 | 53.64 | b | 39.38 | b | 20.82 | 12.10 | b | 39.98 | |||||
1992 | 14.63 | d | 19.17 | 26.18 | 35.93 | 56.74 | 60.78 | a | 60.90 | 63.05 | 53.82 | b | ----- | z | 25.87 | c | 8.74 | b | 38.71 | a | ||||||
1993 | 3.94 | d | 6.44 | d | 25.02 | c | 38.32 | e | 51.77 | a | 58.55 | a | 62.85 | a | 65.48 | a | 50.50 | 39.72 | b | 22.86 | b | 13.52 | d | 36.58 | ||
1994 | -5.35 | h | 1.75 | d | 27.81 | g | 37.02 | d | 53.48 | e | 61.93 | b | 63.31 | b | 62.28 | b | 56.39 | c | 48.11 | c | 30.89 | c | 21.75 | e | 43.69 | b |
1995 | 5.63 | e | 6.79 | d | 24.61 | d | 33.57 | c | 51.42 | e | 70.57 | a | 65.28 | a | 66.12 | e | 52.47 | ----- | z | 16.35 | m | 1.83 | s | 41.83 | c | |
1996 | -3.62 | n | 9.89 | f | 13.57 | c | ----- | z | 56.54 | s | 62.13 | c | 64.03 | a | 64.29 | 55.13 | 41.17 | d | 16.24 | g | 8.20 | i | 50.05 | f | ||
1997 | -1.72 | o | 12.00 | c | ----- | z | 36.30 | e | 45.07 | d | 65.09 | b | 66.87 | a | 64.59 | c | ----- | z | ----- | z | 21.19 | d | 22.59 | c | 41.71 | d |
1998 | 10.22 | f | 26.59 | a | 21.74 | d | 44.47 | a | 57.02 | i | 59.79 | b | 67.62 | a | 68.45 | c | 60.11 | h | 44.29 | g | 28.30 | c | 13.78 | f | 45.28 | e |
1999 | 3.31 | d | 19.28 | e | 27.26 | d | 42.87 | c | 54.07 | b | 62.74 | c | 69.09 | d | 64.17 | b | 52.20 | c | 40.36 | b | 36.63 | d | 19.90 | g | 42.91 | a |
2000 | 7.09 | i | 18.64 | d | 30.36 | f | 34.43 | c | 50.39 | c | 57.00 | e | 63.09 | h | 62.60 | e | 47.19 | c | 44.91 | h | 26.48 | b | -1.11 | h | 42.39 | e |
2001 | 11.10 | e | -0.34 | i | 22.19 | d | 38.17 | f | 54.53 | b | 61.86 | h | 67.98 | c | 69.73 | e | 55.22 | c | 43.44 | d | 37.58 | d | 19.08 | f | 45.22 | d |
2002 | 13.94 | f | 17.44 | c | 14.20 | h | 33.52 | b | 44.29 | c | 63.54 | g | 70.33 | a | 65.50 | c | 58.67 | d | 33.12 | c | 21.82 | j | 16.02 | e | 42.36 | d |
2003 | 2.02 | e | 2.20 | c | 19.00 | f | 38.25 | d | 51.78 | f | 61.65 | 65.93 | c | 69.19 | b | 57.59 | h | 46.72 | h | 23.07 | p | 17.28 | d | 36.65 | e | |
2004 | -2.56 | f | 15.83 | e | 28.50 | h | 39.00 | 48.85 | d | 58.38 | e | 66.82 | a | 59.94 | 62.30 | c | 46.95 | i | 33.27 | d | 15.42 | m | 48.05 | d | ||
2005 | 3.93 | c | 17.15 | d | 22.66 | c | 43.63 | d | ----- | z | ----- | z | 72.46 | h | 67.50 | a | 60.87 | 47.14 | c | 31.91 | g | 17.69 | e | 35.07 | d | |
2006 | 22.72 | a | 8.68 | i | 27.28 | b | 46.95 | 55.63 | 65.96 | d | 73.93 | a | 67.74 | 57.83 | 41.08 | a | 29.15 | d | 22.10 | b | 46.40 | a | ||||
2007 | 12.96 | h | 5.16 | f | 27.93 | a | 38.28 | a | 56.16 | 67.10 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.37 | h | |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2011 | ----- | z | 11.94 | j | 24.06 | n | 40.35 | f | 54.36 | f | 62.77 | f | 71.38 | f | 67.73 | i | 57.96 | g | 49.52 | g | 32.40 | j | 23.45 | k | ----- | z |
2012 | 18.39 | m | 18.79 | l | 35.97 | l | 41.14 | i | 54.62 | g | 65.20 | c | 72.46 | d | 67.04 | g | ----- | z | 41.27 | 27.02 | 13.68 | 43.93 | g | |||
2013 | 7.85 | ----- | z | 17.15 | 30.02 | 50.35 | ----- | z | 68.81 | ----- | z | 60.20 | 43.95 | 25.28 | -0.45 | a | 33.68 | c | ||||||||
2014 | -3.03 | p | 1.84 | 16.44 | 36.57 | 53.92 | 64.92 | 68.06 | 68.65 | 59.28 | 46.56 | 20.72 | 18.02 | 41.36 | a | |||||||||||
2015 | 11.11 | 0.66 | 28.27 | 43.03 | 54.71 | 65.27 | 70.97 | 68.42 | 63.83 | 47.84 | 34.87 | 23.77 | 42.73 | |||||||||||||
2016 | 10.84 | 16.55 | 32.35 | 38.92 | 57.26 | 64.80 | 70.03 | 68.95 | 60.00 | 46.31 | 41.07 | 14.05 | 43.43 | |||||||||||||
2017 | 12.00 | 19.82 | 25.05 | 42.77 | 53.37 | 65.03 | 70.32 | 66.32 | 59.77 | 46.73 | 24.65 | 9.69 | 41.29 | |||||||||||||
2018 | 7.69 | 5.82 | 27.03 | 31.28 | 58.60 | 65.40 | 69.05 | 67.60 | 56.40 | 38.94 | 20.05 | 18.82 | 38.89 | |||||||||||||
2019 | 1.82 | 1.54 | 19.47 | 38.28 | 48.95 | 63.18 | 69.73 | ----- | z | 58.02 | 41.05 | 23.45 | 14.60 | 34.55 | a | |||||||||||
2020 | 9.90 | 10.26 | 26.24 | 35.58 | 52.26 | 65.92 | 70.95 | 68.13 | 55.00 | 37.24 | 31.60 | 18.98 | 40.17 | |||||||||||||
2021 | 16.73 | 2.80 | 32.85 | 39.62 | 55.90 | 69.85 | 73.16 | 70.61 | 61.48 | 51.08 | 30.68 | 15.37 | 43.35 | |||||||||||||
2022 | 0.34 | 0.20 | 21.87 | 31.85 | 53.81 | 64.03 | 68.89 | 66.97 | 59.78 | 46.23 | 29.00 | 9.35 | 37.69 | |||||||||||||
2023 | 13.06 | 12.29 | 18.76 | 36.32 | ----- | z | 69.30 | 67.24 | 67.79 | 63.02 | 47.82 | 30.78 | 28.79 | 41.38 | a | |||||||||||
2024 | 12.40 | 24.91 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.66 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 4.64 | 9.29 | 22.62 | 38.33 | 52.54 | 62.94 | 67.93 | 66.11 | 55.90 | 43.93 | 27.41 | 11.98 | 38.60 | |||||||||||||
S.D. | 7.08 | 7.30 | 5.57 | 4.12 | 4.11 | 3.27 | 2.64 | 2.83 | 3.35 | 3.76 | 4.98 | 6.67 | 2.20 | |||||||||||||
SKEW | 0.06 | 0.58 | -0.00 | 0.20 | 0.09 | 0.03 | -0.13 | -0.12 | 0.08 | -0.12 | 0.18 | 0.08 | 0.48 | |||||||||||||
MAX | 22.72 | 26.59 | 33.23 | 48.48 | 64.17 | 70.57 | 73.93 | 71.81 | 63.83 | 52.32 | 41.07 | 28.79 | 43.82 | |||||||||||||
MIN | -9.82 | -2.48 | 11.60 | 29.18 | 44.29 | 55.10 | 60.90 | 59.11 | 47.19 | 33.13 | 15.73 | -1.65 | 33.71 | |||||||||||||
YRS | 63 | 68 | 67 | 72 | 66 | 70 | 70 | 70 | 69 | 66 | 64 | 66 | 46 |