YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.63 | p | 65.83 | a | 57.40 | d | 51.09 | c | 33.18 | h | 18.54 | h | 58.11 | i |
1947 | 17.52 | e | 12.27 | b | 25.04 | c | 40.32 | b | 46.42 | m | 62.09 | b | 69.17 | b | 74.93 | b | 60.65 | c | 57.14 | b | 25.96 | c | 15.76 | f | 44.51 | b |
1948 | 5.91 | h | 13.64 | g | 24.55 | b | 46.73 | f | 54.31 | d | 63.31 | a | 70.09 | b | 68.44 | 62.40 | 46.00 | 35.00 | 16.26 | 48.93 | c | |||||
1949 | 14.15 | 12.16 | 25.02 | 42.77 | 56.73 | 67.87 | 71.23 | 68.42 | 53.88 | 49.26 | 31.72 | 16.48 | 42.47 | |||||||||||||
1950 | 6.70 | a | 11.52 | 18.66 | 34.20 | 52.08 | 62.13 | 64.11 | 60.97 | 56.93 | 51.20 | a | 26.20 | b | 6.66 | 37.61 | ||||||||||
1951 | 7.10 | 12.57 | 19.26 | 38.93 | a | 56.92 | 59.82 | 66.13 | 62.77 | 53.10 | 45.27 | 21.20 | 15.11 | 38.18 | ||||||||||||
1952 | 11.03 | 19.50 | 22.42 | 45.08 | 52.27 | c | 64.88 | 69.40 | 65.05 | 57.97 | 40.06 | 33.05 | a | 21.66 | 41.87 | |||||||||||
1953 | 15.42 | 12.74 | a | 26.02 | 38.58 | 55.05 | 65.70 | 67.77 | 68.29 | b | 58.32 | 53.32 | 36.12 | a | 19.73 | 43.09 | ||||||||||
1954 | 8.98 | 25.23 | 24.23 | 42.47 | 48.08 | 66.18 | 68.00 | 64.77 | 55.43 | 44.78 | a | 34.25 | 19.82 | 41.85 | ||||||||||||
1955 | 10.15 | 11.27 | 20.56 | 48.65 | 58.35 | 63.12 | 72.66 | 70.77 | 57.82 | 46.42 | a | 25.25 | d | 8.98 | 41.17 | |||||||||||
1956 | 11.89 | 9.74 | 19.98 | 37.87 | 52.42 | 66.35 | 64.31 | 65.27 | 54.10 | 52.14 | c | 29.47 | 18.81 | 40.20 | ||||||||||||
1957 | 3.34 | 14.66 | 26.05 | 42.93 | 52.18 | 62.75 | 69.42 | 64.23 | 54.55 | 44.02 | 29.10 | a | 17.32 | 40.05 | ||||||||||||
1958 | 15.00 | 8.41 | 28.94 | 43.20 | 53.37 | 58.08 | 64.79 | 64.87 | 57.30 | 47.98 | 32.50 | 9.62 | a | 40.34 | ||||||||||||
1959 | 5.02 | a | 8.30 | 24.60 | 41.92 | 57.76 | 64.85 | 67.02 | 69.79 | 58.33 | 41.56 | 20.45 | 24.82 | 40.37 | ||||||||||||
1960 | 14.69 | 15.60 | 15.71 | 42.32 | 52.44 | 60.32 | 66.34 | 67.39 | 59.43 | 46.32 | 32.90 | 14.34 | 40.65 | |||||||||||||
1961 | 11.19 | 21.88 | 29.40 | 37.78 | 50.85 | 63.08 | 66.65 | 65.92 | 56.47 | 45.90 | b | 28.07 | 11.62 | k | 43.38 | a | ||||||||||
1962 | 4.69 | 10.09 | a | 23.89 | 38.95 | 56.74 | 61.32 | 62.74 | 64.02 | 52.30 | 46.18 | 31.46 | b | 14.39 | 38.90 | |||||||||||
1963 | 0.98 | 6.57 | 28.35 | 44.60 | 52.11 | 65.27 | 68.52 | 63.37 | 56.02 | 54.74 | 35.05 | 6.10 | 40.14 | |||||||||||||
1964 | 13.97 | 17.59 | 25.30 | a | 43.87 | 58.34 | 63.83 | 67.69 | g | 61.77 | 54.71 | a | 43.24 | 33.67 | 9.94 | 38.75 | a | |||||||||
1965 | 6.68 | 8.46 | 18.89 | 38.05 | 57.00 | 61.43 | 64.16 | 62.61 | 51.32 | 44.44 | 29.98 | 22.37 | 38.78 | |||||||||||||
1966 | -1.10 | 12.39 | 28.95 | 37.59 | c | 47.27 | 62.93 | 68.12 | a | 60.55 | a | 56.02 | a | 45.13 | 29.83 | 16.45 | 38.68 | |||||||||
1967 | 13.66 | 6.06 | b | 24.56 | 42.03 | 47.82 | 63.23 | 65.11 | 61.56 | 55.92 | 44.08 | 27.95 | 18.87 | 39.24 | ||||||||||||
1968 | 11.42 | 10.67 | 34.53 | a | 44.22 | a | 50.77 | 61.93 | 65.61 | 66.10 | 57.90 | 48.03 | 32.38 | 15.58 | 41.60 | |||||||||||
1969 | 6.82 | 15.16 | 21.50 | 45.47 | 55.47 | 56.53 | 67.94 | 68.87 | 57.88 | a | 43.28 | a | 30.70 | 18.40 | 40.67 | |||||||||||
1970 | 3.56 | 11.20 | 22.32 | 43.30 | 54.25 | a | 65.71 | a | 70.05 | b | 66.97 | a | 57.90 | 49.47 | 30.65 | 17.42 | 41.07 | |||||||||
1971 | 3.37 | 12.62 | 22.08 | a | 41.36 | a | 51.88 | a | 67.87 | 65.24 | 63.92 | 59.07 | 52.82 | 32.60 | 17.35 | 40.85 | ||||||||||
1972 | 2.63 | 8.14 | 20.56 | 37.78 | 59.40 | 61.74 | a | 65.98 | 66.08 | 56.70 | 41.03 | a | 30.78 | 10.66 | 38.46 | |||||||||||
1973 | 14.21 | 17.14 | 37.37 | 40.92 | 49.68 | a | 65.28 | 68.82 | 68.69 | 57.22 | 50.81 | 31.08 | 15.45 | 43.06 | ||||||||||||
1974 | 11.57 | a | 12.09 | 25.63 | a | 42.12 | 50.38 | b | 59.38 | 69.87 | 64.68 | 51.65 | 44.23 | a | 33.58 | 21.69 | 40.57 | |||||||||
1975 | 12.19 | 13.89 | 19.40 | 35.07 | 57.82 | 62.72 | a | 69.03 | 65.48 | 52.93 | 48.05 | c | 36.47 | a | 16.61 | 40.81 | ||||||||||
1976 | 5.10 | 20.02 | 25.15 | 44.68 | 51.85 | 65.18 | 68.03 | a | 65.11 | 54.07 | 39.67 | a | 22.52 | 4.23 | 38.80 | |||||||||||
1977 | -5.00 | a | 12.77 | b | 32.73 | 47.37 | 62.22 | a | 62.13 | c | 69.03 | a | 60.55 | 56.17 | 43.58 | 29.43 | 13.28 | a | 40.35 | |||||||
1978 | 4.57 | a | 6.18 | 22.40 | 39.82 | 56.62 | c | 61.87 | 65.47 | 66.16 | 60.10 | 43.02 | 28.68 | 11.19 | b | 38.84 | ||||||||||
1979 | 0.41 | b | 6.57 | 25.76 | 39.87 | 50.02 | 62.40 | 68.66 | 64.19 | 58.92 | 43.03 | 29.72 | 21.18 | 39.23 | ||||||||||||
1980 | 10.74 | 12.21 | 21.80 | a | 44.32 | 57.37 | 62.62 | 69.39 | 66.58 | 55.60 | 40.98 | 32.02 | 15.79 | 40.78 | ||||||||||||
1981 | 12.79 | 19.38 | 31.19 | 44.62 | 53.35 | 63.63 | 67.53 | 66.63 | 55.12 | 42.10 | 35.48 | 14.73 | 42.21 | |||||||||||||
1982 | 1.36 | b | 11.84 | 24.32 | 37.79 | a | 59.44 | 58.13 | 69.37 | a | 64.73 | 55.85 | 46.45 | a | 30.29 | a | 23.57 | a | 40.26 | |||||||
1983 | 17.28 | a | 23.68 | 31.08 | 39.20 | 49.37 | 64.42 | 72.84 | 70.72 | a | 58.90 | 46.44 | 32.66 | a | 2.78 | a | 42.45 | |||||||||
1984 | 10.02 | b | 25.76 | 22.05 | 44.50 | a | 51.50 | 65.68 | 66.97 | 69.37 | 54.20 | e | 48.28 | b | 30.48 | b | 16.43 | b | 42.10 | |||||||
1985 | 7.95 | 11.75 | 32.90 | a | 46.95 | a | 58.73 | 60.26 | c | 67.08 | 64.32 | 57.85 | d | 45.05 | b | 24.92 | 6.17 | e | 40.33 | |||||||
1986 | 11.52 | c | 12.77 | b | 29.72 | b | 47.55 | b | 57.40 | b | 63.64 | a | 69.47 | 62.68 | a | 57.43 | a | 45.34 | b | 26.13 | c | 20.95 | a | 42.05 | ||
1987 | 16.55 | b | 24.87 | b | 34.20 | a | 46.52 | h | 58.44 | e | 66.81 | a | 71.55 | a | 66.07 | a | 58.10 | 39.28 | d | 35.70 | e | 23.23 | c | 44.98 | a | |
1988 | 6.73 | c | 8.40 | d | 28.25 | e | 42.57 | b | 59.52 | 67.53 | 71.89 | 69.70 | a | 57.20 | 38.42 | a | 32.22 | 15.00 | c | 41.45 | ||||||
1989 | 16.17 | a | 4.82 | 21.81 | b | 39.32 | b | 52.52 | b | 61.10 | a | 69.40 | 65.59 | b | 56.54 | b | 46.10 | b | 24.66 | a | 3.98 | a | 38.50 | |||
1990 | 21.52 | 14.95 | 30.42 | 44.45 | 51.37 | 64.37 | 67.32 | 66.19 | 59.67 | 43.16 | 34.36 | a | 16.08 | a | 42.82 | |||||||||||
1991 | 7.20 | a | 17.94 | a | 29.03 | 46.38 | 59.08 | 68.22 | a | 67.33 | a | 67.35 | 54.21 | a | 43.65 | 23.63 | 17.55 | 41.80 | ||||||||
1992 | 16.36 | b | 22.81 | 26.34 | 39.03 | 56.00 | 60.77 | 61.87 | a | 62.10 | 54.24 | a | 43.77 | 30.15 | 18.37 | 40.98 | ||||||||||
1993 | 10.50 | 13.02 | 25.89 | 38.42 | 54.13 | 60.27 | 67.06 | 66.95 | 50.25 | 42.78 | a | 29.55 | a | 19.38 | a | 39.85 | ||||||||||
1994 | -0.21 | b | 8.78 | a | 29.82 | a | 41.17 | a | 55.18 | 65.40 | a | 65.80 | a | 63.35 | 60.22 | 48.65 | 35.40 | 22.87 | 41.37 | |||||||
1995 | 13.79 | e | 13.36 | 30.37 | 36.77 | 53.04 | c | 68.20 | 68.73 | 70.83 | d | 55.23 | 45.47 | b | 21.95 | 13.20 | a | 40.91 | ||||||||
1996 | 6.95 | a | 11.94 | d | 19.38 | c | 37.95 | 51.48 | a | 64.27 | b | 65.12 | a | 66.60 | a | 57.37 | 45.47 | 23.80 | 15.76 | 38.84 | ||||||
1997 | 9.68 | c | 18.26 | a | 25.68 | a | 40.85 | 48.75 | a | 65.53 | a | 66.73 | a | 62.72 | b | 58.59 | b | 45.57 | a | 28.25 | 24.44 | 41.25 | ||||
1998 | 17.77 | 28.93 | a | 29.38 | a | 47.55 | 60.78 | a | 63.02 | a | 68.35 | 67.67 | a | 61.87 | d | 47.55 | 35.62 | a | 26.90 | e | 46.28 | |||||
1999 | 9.08 | 23.56 | b | 30.23 | 46.35 | 58.05 | 64.66 | a | 71.08 | a | 64.80 | a | 56.48 | 43.90 | 38.26 | a | 20.77 | 43.94 | ||||||||
2000 | 11.68 | 22.34 | 37.95 | a | 42.41 | a | 56.75 | a | 62.17 | 67.00 | b | 67.06 | 57.67 | a | 49.21 | 30.92 | 6.47 | 42.64 | ||||||||
2001 | 18.24 | 11.52 | 25.97 | 45.45 | 56.64 | b | 64.70 | 69.32 | 69.61 | 56.75 | 45.34 | 42.97 | 25.89 | 44.37 | ||||||||||||
2002 | 23.10 | 24.82 | 23.03 | 42.07 | a | 50.02 | 65.91 | b | 72.50 | 66.85 | 60.54 | b | 40.67 | a | 30.85 | 22.42 | a | 43.56 | ||||||||
2003 | 10.93 | b | 12.55 | 29.10 | 42.77 | 54.65 | a | 63.43 | a | 67.97 | 69.89 | 59.19 | a | 46.17 | a | 30.82 | b | 24.04 | c | 42.62 | ||||||
2004 | 8.81 | b | 18.91 | f | 31.84 | c | 44.41 | b | 52.04 | c | 60.61 | c | 67.08 | 61.16 | f | 62.54 | f | 48.36 | i | 34.66 | h | 18.52 | j | 44.13 | f | |
2005 | 11.90 | b | 22.52 | a | 26.31 | e | 46.21 | f | 53.46 | d | 69.33 | a | 71.10 | a | 67.56 | 62.53 | 47.76 | j | 33.16 | k | 17.34 | b | 44.67 | c | ||
2006 | 25.98 | a | 15.26 | a | 29.96 | f | 49.22 | a | 55.97 | a | 64.08 | 70.97 | a | 66.23 | 54.11 | b | 41.06 | 35.07 | a | 25.23 | 45.74 | a | ||||
2007 | 17.26 | 8.62 | 32.24 | 42.68 | 58.40 | 65.12 | 67.79 | 66.18 | a | 59.10 | 51.40 | 31.20 | 13.29 | 42.77 | ||||||||||||
2008 | 11.31 | 9.60 | c | 21.45 | 41.05 | 51.13 | a | 62.38 | 67.10 | b | 63.91 | o | 59.60 | 44.34 | 29.43 | c | 9.74 | d | 37.01 | a | ||||||
2009 | 0.62 | a | 15.77 | 26.69 | 41.30 | 53.71 | 61.47 | 60.84 | f | 62.53 | 58.75 | b | 39.53 | 37.97 | a | 15.95 | 37.66 | a | ||||||||
2010 | 12.34 | 16.33 | b | 35.65 | 48.23 | b | 56.24 | 63.60 | 69.98 | 69.87 | 54.75 | 47.47 | 32.20 | 13.74 | 43.37 | |||||||||||
2011 | 6.89 | 13.21 | d | 23.53 | 39.58 | 53.03 | 63.37 | 71.08 | 66.42 | 55.57 | 48.39 | 34.95 | 21.66 | 41.47 | ||||||||||||
2012 | 16.18 | 22.71 | 44.26 | b | 44.35 | 58.34 | 65.48 | 72.18 | 64.94 | 55.90 | 42.65 | 32.83 | 21.69 | 45.12 | ||||||||||||
2013 | 12.76 | 12.73 | 19.76 | 34.92 | 55.10 | 63.57 | 68.97 | a | 66.66 | 60.21 | a | 45.35 | 28.02 | 7.65 | 39.64 | |||||||||||
2014 | 1.92 | 1.20 | 17.28 | a | 37.40 | 54.37 | 66.78 | 65.34 | 66.10 | b | 56.90 | 44.30 | a | 22.35 | 21.48 | 37.95 | ||||||||||
2015 | 11.39 | 3.25 | 28.58 | 44.07 | 55.84 | 64.07 | 67.53 | 64.98 | 63.97 | 46.55 | 37.88 | a | 29.58 | 43.14 | ||||||||||||
2016 | 11.53 | 18.31 | 35.03 | 41.90 | 55.45 | 65.68 | 69.02 | 68.21 | 61.38 | 48.68 | 40.05 | 17.28 | a | 44.38 | ||||||||||||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.19 | m | ----- | z |
2020 | 16.00 | g | 23.93 | v | 32.62 | k | 41.16 | h | 54.07 | c | 67.04 | e | 70.64 | c | 66.93 | c | 56.57 | c | 39.31 | e | 36.78 | g | 22.25 | k | 59.09 | f |
2021 | 19.31 | g | 13.00 | x | 38.30 | i | 47.28 | g | 55.15 | d | 69.04 | b | 68.94 | d | 67.64 | f | 59.70 | g | 53.02 | g | 31.80 | b | 23.42 | g | 56.23 | h |
2022 | 12.23 | t | 9.22 | l | 33.18 | q | 37.63 | d | 56.44 | g | 64.06 | m | 67.40 | e | 66.32 | c | 59.39 | c | 44.33 | h | 34.21 | d | 16.70 | c | 46.94 | f |
2023 | 20.63 | l | 20.02 | f | 25.09 | d | 42.32 | h | 55.56 | m | 64.68 | e | 66.18 | c | 65.71 | b | 61.61 | b | 48.18 | c | 31.12 | d | 30.03 | l | 51.79 | e |
2024 | 20.10 | b | 28.15 | b | 34.46 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.13 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 10.27 | 14.37 | 26.39 | 41.90 | 54.48 | 63.73 | 68.09 | 66.05 | 57.13 | 45.69 | 30.96 | 16.60 | 41.12 | |||||||||||||
S.D. | 6.07 | 6.17 | 5.42 | 3.52 | 3.37 | 2.62 | 2.36 | 2.71 | 2.75 | 3.83 | 4.52 | 5.96 | 1.88 | |||||||||||||
SKEW | -0.04 | 0.44 | 0.62 | -0.01 | -0.06 | -0.19 | -0.15 | 0.32 | -0.03 | 0.51 | -0.19 | -0.36 | 0.34 | |||||||||||||
MAX | 25.98 | 28.93 | 44.26 | 49.22 | 62.22 | 69.33 | 72.84 | 74.93 | 63.97 | 57.14 | 42.97 | 29.58 | 46.28 | |||||||||||||
MIN | -5.00 | 1.20 | 15.71 | 34.20 | 47.27 | 56.53 | 61.87 | 60.55 | 50.25 | 38.42 | 20.45 | 2.78 | 37.61 | |||||||||||||
YRS | 70 | 69 | 70 | 68 | 71 | 73 | 72 | 72 | 73 | 71 | 71 | 68 | 60 |