YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | 31.45 | c | 54.05 | 59.27 | a | 65.14 | a | 72.69 | 73.13 | 68.08 | 55.00 | v | 32.98 | 19.34 | 52.90 | c | ||||||
1949 | 11.34 | 15.44 | a | 32.24 | 48.59 | a | 63.56 | 70.95 | 77.32 | 74.50 | 58.53 | 50.27 | 41.27 | 21.11 | 47.09 | |||||||||||
1950 | 4.72 | b | 18.84 | 24.24 | 39.70 | 54.75 | a | 67.52 | 67.92 | 67.97 | a | 62.17 | 53.53 | 32.03 | 20.38 | b | 42.81 | |||||||||
1951 | 16.73 | 26.52 | 21.50 | 43.24 | a | 59.55 | 62.40 | 70.97 | 69.18 | 57.47 | 48.95 | 29.78 | 15.34 | b | 43.47 | |||||||||||
1952 | 15.33 | a | 27.91 | a | 26.84 | 49.12 | 59.18 | 72.47 | 75.27 | 72.11 | 66.55 | 47.34 | 34.60 | 23.35 | 47.51 | |||||||||||
1953 | 17.35 | k | ----- | z | ----- | z | ----- | z | 57.80 | a | 71.60 | 74.15 | a | 73.85 | 65.13 | g | 60.05 | k | 39.09 | a | 21.19 | 56.28 | f | |||
1954 | 10.98 | b | 35.48 | 28.27 | 49.82 | 53.50 | 68.55 | b | 76.10 | 71.32 | a | 63.12 | 48.03 | a | 37.32 | m | 22.00 | a | 47.92 | a | ||||||
1955 | 19.63 | 13.94 | a | 30.05 | 55.47 | 64.27 | a | 66.40 | 78.93 | c | 77.39 | 63.46 | b | 50.58 | 23.95 | 10.65 | 46.23 | |||||||||
1956 | 9.65 | 14.81 | 30.47 | 42.87 | 59.61 | d | 74.45 | j | 72.84 | 71.82 | 63.17 | 57.10 | b | 32.95 | a | 26.89 | 43.83 | a | ||||||||
1957 | 10.94 | 25.16 | 33.15 | 47.15 | 57.77 | 67.15 | 78.21 | 74.07 | a | 61.08 | 49.65 | 34.70 | 29.78 | a | 47.40 | |||||||||||
1958 | 24.65 | 17.98 | a | 29.76 | 48.38 | 64.39 | 66.37 | 70.02 | a | 75.77 | 66.07 | 53.81 | 35.92 | 18.24 | 47.61 | |||||||||||
1959 | 12.90 | a | 16.48 | 38.52 | 49.07 | a | 60.55 | 73.53 | 75.08 | 78.15 | 63.58 | 46.11 | 25.88 | 30.19 | 47.50 | |||||||||||
1960 | 14.74 | 15.16 | 18.56 | 47.75 | 58.98 | 66.40 | 74.77 | 73.76 | 63.90 | 51.79 | 36.93 | 22.33 | j | 47.52 | a | |||||||||||
1961 | 13.77 | i | 25.54 | 37.15 | 44.33 | 57.48 | 70.15 | 73.29 | 74.95 | 60.97 | 52.68 | a | 34.57 | 16.35 | 49.77 | a | ||||||||||
1962 | 12.50 | e | 18.68 | 24.56 | 47.73 | 63.81 | 67.40 | 71.42 | 72.39 | h | 58.82 | h | 51.31 | e | 39.48 | g | 23.56 | 42.33 | c | |||||||
1963 | 8.65 | a | 22.66 | c | ----- | z | 50.59 | c | 60.37 | 73.65 | 76.47 | 72.81 | 66.35 | 60.03 | 39.62 | 15.32 | 49.68 | a | ||||||||
1964 | 24.18 | 28.14 | 28.15 | 50.20 | 64.05 | 71.28 | 79.10 | 69.87 | 63.03 | 51.48 | 35.14 | a | 16.75 | a | 48.45 | |||||||||||
1965 | 14.05 | 18.91 | 23.53 | 49.22 | 63.08 | 69.62 | 74.05 | 72.77 | 54.93 | 54.94 | 36.42 | 30.88 | f | 48.32 | a | |||||||||||
1966 | 8.31 | 18.80 | 38.74 | 43.62 | 57.97 | 70.15 | 79.16 | 70.11 | 62.32 | 52.26 | 32.92 | 21.98 | 46.36 | |||||||||||||
1967 | 19.53 | 19.57 | 40.25 | a | 49.43 | 56.24 | 68.08 | 74.06 | 72.13 | a | 63.38 | 50.68 | 34.92 | 24.31 | 47.72 | |||||||||||
1968 | 18.10 | a | 21.14 | 43.44 | 50.33 | 55.77 | 72.58 | 74.62 | c | 74.40 | 62.52 | 51.65 | 36.10 | 18.27 | a | 48.24 | ||||||||||
1969 | 9.61 | 22.32 | 22.60 | 50.87 | 62.76 | 64.68 | 74.77 | 74.32 | 64.57 | 45.21 | 35.35 | 22.40 | 45.79 | |||||||||||||
1970 | 7.74 | 24.41 | 29.27 | 47.03 | 63.40 | 72.15 | 76.29 | 75.15 | 64.75 | 50.83 | e | 33.88 | 17.77 | 46.89 | ||||||||||||
1971 | 11.23 | 20.38 | 32.16 | 49.92 | 58.47 | 73.97 | 71.76 | 74.73 | 63.28 | 54.03 | a | 35.30 | 20.48 | 47.14 | ||||||||||||
1972 | 10.98 | 15.05 | 34.16 | 46.87 | 60.94 | 69.85 | 73.18 | 72.73 | 62.72 | 47.66 | 33.70 | 17.11 | 45.41 | |||||||||||||
1973 | 19.53 | 24.21 | 40.66 | 47.70 | 59.08 | 71.32 | 75.82 | 78.18 | a | 61.58 | 55.10 | 34.75 | 17.95 | 48.82 | ||||||||||||
1974 | 14.27 | 25.62 | 36.06 | 49.72 | 57.85 | 67.80 | 79.35 | a | 70.00 | a | 60.38 | 53.32 | 34.75 | 24.37 | 47.79 | |||||||||||
1975 | 18.24 | 16.96 | 26.52 | 41.78 | 62.06 | 68.73 | 78.10 | 73.89 | 60.38 | 53.37 | 34.87 | 21.34 | 46.35 | |||||||||||||
1976 | 16.47 | 30.88 | 36.05 | 52.70 | 59.19 | 70.95 | 76.98 | c | 76.81 | 64.85 | 44.97 | b | 29.97 | ----- | z | 50.89 | a | |||||||||
1977 | 8.50 | 29.39 | 36.05 | 54.93 | 66.95 | 71.72 | a | 78.05 | 70.05 | 63.73 | 49.74 | 33.03 | 18.21 | 48.36 | ||||||||||||
1978 | 2.03 | ----- | z | 31.10 | g | 47.59 | a | 60.61 | 69.57 | a | 73.42 | a | 72.98 | 69.03 | 51.61 | ----- | z | ----- | z | 55.86 | d | |||||
1979 | 2.79 | 9.29 | 30.78 | a | 45.22 | ----- | z | 69.45 | 73.50 | 71.21 | ----- | z | 50.25 | a | 32.15 | 29.58 | 41.42 | b | ||||||||
1980 | ----- | z | 19.24 | 32.52 | 51.86 | b | ----- | z | ----- | z | ----- | z | ----- | z | 65.92 | 50.63 | ----- | z | 23.24 | 40.57 | f | |||||
1981 | ----- | z | 29.00 | a | 39.94 | ----- | z | 59.10 | 70.95 | 74.97 | 70.42 | ----- | z | ----- | z | ----- | z | ----- | z | 57.39 | f | |||||
1982 | ----- | z | 20.12 | c | ----- | z | 44.93 | b | 59.56 | g | ----- | z | 74.50 | f | 71.55 | j | 60.65 | d | 48.85 | d | 31.59 | a | ----- | z | 41.23 | g |
1983 | 21.55 | b | 25.71 | d | 33.48 | e | 42.67 | l | 55.53 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.91 | i |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.73 | t | 75.90 | g | 57.39 | g | 50.12 | c | 37.32 | e | 20.76 | b | 36.07 | i |
1985 | 14.20 | f | 17.57 | e | 38.55 | b | 53.43 | i | ----- | z | 65.82 | e | 73.52 | g | 68.77 | g | 61.04 | f | 49.28 | f | 21.34 | a | 10.92 | e | 30.84 | g |
1986 | 24.17 | h | 18.57 | f | 40.91 | h | 48.14 | a | 61.24 | 72.25 | b | 76.05 | 69.00 | 61.12 | 51.66 | 31.66 | a | 27.85 | 55.44 | c | ||||||
1987 | 25.65 | a | 34.71 | 39.33 | a | 55.45 | 66.79 | 73.42 | 76.37 | a | 70.80 | a | 62.90 | 46.65 | a | 38.29 | a | 25.84 | 51.35 | |||||||
1988 | 10.62 | a | 16.22 | 37.78 | a | 49.12 | 65.71 | b | 77.33 | 77.21 | 75.06 | 65.02 | 47.18 | 36.53 | 25.31 | 48.59 | ||||||||||
1989 | 27.92 | a | 11.83 | a | 31.24 | 50.87 | 59.95 | 68.58 | 77.79 | 73.60 | 62.93 | 51.65 | 32.41 | a | 13.00 | 46.81 | ||||||||||
1990 | 30.58 | 27.98 | 39.08 | 48.23 | 57.92 | 71.78 | 73.40 | 74.02 | 68.77 | 50.21 | 36.75 | b | 16.85 | a | 49.63 | |||||||||||
1991 | 14.66 | 30.71 | 36.05 | 49.32 | 60.74 | 73.40 | 74.15 | 73.45 | 61.78 | 46.10 | 24.91 | a | 25.48 | 47.56 | ||||||||||||
1992 | 26.29 | 29.57 | 37.50 | 42.98 | a | 60.37 | 65.79 | a | 65.03 | 65.42 | a | 59.43 | 47.95 | b | 29.95 | 19.02 | 45.78 | |||||||||
1993 | 12.02 | 13.59 | 27.74 | 43.62 | 57.32 | 64.53 | 69.97 | 69.87 | 55.08 | 46.45 | 28.48 | 21.15 | 42.49 | |||||||||||||
1994 | 5.81 | 11.45 | 35.63 | 45.92 | 61.18 | 69.48 | 69.08 | 68.44 | 62.62 | 50.82 | 35.48 | 20.40 | 44.69 | |||||||||||||
1995 | 14.69 | 22.55 | 31.48 | 40.20 | 54.21 | 68.50 | 74.02 | b | 74.11 | 59.60 | 46.47 | 27.53 | 22.71 | 44.67 | ||||||||||||
1996 | 11.03 | 21.57 | 25.08 | 42.18 | 54.76 | 70.02 | a | 69.32 | 69.74 | 58.93 | 47.53 | 23.55 | a | 10.23 | 42.00 | |||||||||||
1997 | 8.03 | b | 19.76 | a | 30.02 | d | 41.30 | c | 51.64 | c | 69.87 | c | 73.37 | 69.62 | c | 63.52 | c | 50.37 | d | 29.15 | c | 27.30 | f | 46.06 | a | |
1998 | 21.23 | i | 32.65 | e | 26.34 | f | 45.90 | d | 62.22 | f | 64.90 | e | 72.40 | e | 71.04 | d | 67.32 | 50.44 | d | 37.19 | f | 26.08 | g | 57.81 | e | |
1999 | 14.15 | e | 27.08 | i | 32.29 | g | 46.67 | d | 59.15 | e | 67.12 | d | 75.95 | c | 70.44 | e | 60.83 | d | 51.64 | j | 43.00 | d | 25.85 | d | 51.46 | c |
2000 | 20.67 | g | 30.04 | f | 39.48 | d | 47.04 | d | 59.84 | i | 67.04 | b | 73.92 | e | 72.88 | e | 59.92 | e | 51.61 | h | 25.24 | g | 8.41 | i | 60.05 | f |
2001 | 17.88 | g | 10.85 | e | 25.79 | e | 47.71 | d | 59.26 | d | 67.69 | f | 75.50 | f | 73.10 | a | 61.36 | b | 46.61 | h | 42.35 | f | 23.96 | e | 43.15 | e |
2002 | 22.81 | e | 30.22 | c | 23.73 | g | 45.32 | e | 53.90 | e | 72.69 | f | 77.68 | c | 71.02 | e | 63.56 | e | 43.23 | c | 32.84 | h | 24.54 | h | 50.97 | d |
2003 | 17.28 | f | 21.78 | c | 29.69 | g | 46.50 | d | 55.69 | b | 65.73 | d | 74.30 | c | 72.93 | c | 59.57 | g | 53.46 | c | 31.56 | f | 24.88 | g | 55.77 | e |
2004 | 15.40 | e | 20.43 | f | 37.52 | f | 47.89 | b | 56.32 | c | 64.42 | f | 70.78 | d | 66.13 | d | 63.52 | e | 51.21 | c | 37.86 | e | 26.17 | h | 51.14 | d |
2005 | 15.48 | g | 29.36 | c | 32.39 | d | 49.88 | e | 56.69 | e | 70.50 | e | 75.12 | e | 71.63 | d | 66.61 | c | 48.81 | d | 39.09 | g | 17.05 | c | 51.80 | b |
2006 | 31.22 | d | 26.11 | f | 32.20 | d | 50.61 | b | 58.68 | 70.65 | 75.59 | h | 71.42 | a | 58.03 | 43.96 | c | 34.28 | 26.84 | 47.79 | b | |||||
2007 | 18.42 | 13.17 | a | 37.10 | b | 43.65 | 62.80 | i | 69.95 | 75.84 | b | 72.36 | b | 63.06 | c | 53.14 | c | 34.95 | 18.73 | 45.49 | a | |||||
2008 | 13.67 | d | 12.41 | b | 28.71 | 41.00 | d | 52.36 | b | 67.62 | a | 73.42 | a | 71.70 | a | 62.70 | 47.50 | 34.07 | b | 15.98 | d | 43.43 | ||||
2009 | 13.09 | b | 24.84 | c | 32.07 | b | 43.57 | b | 57.16 | 68.22 | 68.14 | c | 69.18 | a | 63.86 | b | 42.98 | 41.68 | e | 14.92 | a | 44.98 | ||||
2010 | 13.94 | f | 13.15 | b | 36.95 | c | 52.98 | f | 56.75 | i | 67.66 | k | 73.60 | k | 73.47 | l | 61.72 | l | 52.69 | m | 34.83 | l | 18.60 | j | 25.05 | j |
2011 | 12.87 | p | 15.58 | j | 30.97 | l | 45.13 | k | 56.77 | k | 69.81 | n | 78.12 | k | 72.18 | i | 60.11 | l | 52.95 | k | 35.05 | j | 26.44 | n | ----- | z |
2012 | 24.55 | l | 27.53 | j | 49.83 | j | 51.10 | i | 61.98 | i | 72.75 | j | 83.43 | p | 74.22 | f | 62.46 | e | 45.24 | 34.18 | 20.69 | 40.64 | h | |||
2013 | 18.03 | 20.57 | 25.74 | 38.48 | 57.90 | 67.90 | a | 72.50 | 71.19 | b | 67.38 | 47.82 | a | 31.85 | 12.13 | 44.29 | ||||||||||
2014 | 12.94 | 13.38 | 28.57 | a | 44.16 | a | 56.77 | 67.59 | a | 68.85 | a | 69.50 | 61.62 | 50.24 | 25.78 | 23.23 | 43.55 | |||||||||
2015 | 20.37 | a | 15.91 | 36.85 | 49.72 | 57.26 | 69.27 | 72.39 | 68.48 | 67.40 | 52.76 | 38.57 | 25.74 | 47.89 | ||||||||||||
2016 | 17.35 | 28.36 | 38.95 | 47.10 | 59.03 | 72.92 | 73.84 | 72.31 | 64.50 | 51.24 | 42.18 | 18.79 | 48.88 | |||||||||||||
2017 | 18.76 | 30.71 | 35.00 | c | 47.83 | 56.73 | 70.53 | 75.40 | 67.34 | 63.92 | 49.82 | 35.35 | 21.08 | 47.71 | ||||||||||||
2018 | 15.13 | 13.36 | 31.76 | 37.38 | 65.68 | 72.28 | 73.31 | 70.84 | 64.78 | 44.60 | 28.45 | 23.97 | 45.13 | |||||||||||||
2019 | 16.85 | 8.70 | 27.56 | 46.27 | 53.98 | 69.83 | 74.95 | 70.27 | a | 67.27 | 43.74 | 32.23 | 22.06 | 44.48 | ||||||||||||
2020 | 18.97 | 22.66 | 38.05 | 44.57 | 56.71 | 74.63 | 75.66 | 73.56 | 62.35 | 43.40 | 38.15 | 25.98 | 47.89 | |||||||||||||
2021 | 25.08 | 12.43 | 40.13 | 46.12 | 58.24 | 74.50 | 74.89 | 73.92 | 66.62 | 53.08 | 39.12 | 25.16 | 49.11 | |||||||||||||
2022 | 16.64 | b | 18.95 | 33.24 | 41.83 | 57.68 | 71.30 | 76.08 | 72.85 | 66.08 | 49.48 | 32.18 | 15.85 | 46.01 | ||||||||||||
2023 | 15.66 | 17.75 | 24.69 | 45.68 | 63.47 | 73.78 | 71.53 | 73.21 | 67.00 | 50.92 | 38.18 | 30.89 | 47.73 | |||||||||||||
2024 | 15.32 | 32.45 | 35.95 | 47.42 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.91 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 15.45 | 21.14 | 32.53 | 46.97 | 59.17 | 69.69 | 74.17 | 72.10 | 63.13 | 49.82 | 33.78 | 20.92 | 46.55 | |||||||||||||
S.D. | 6.38 | 6.82 | 5.57 | 3.88 | 3.48 | 2.95 | 2.97 | 2.63 | 3.00 | 3.45 | 4.60 | 4.89 | 2.08 | |||||||||||||
SKEW | 0.36 | 0.20 | -0.31 | -0.13 | 0.24 | -0.02 | -0.59 | -0.04 | -0.38 | 0.08 | -0.53 | -0.14 | -0.32 | |||||||||||||
MAX | 31.22 | 35.48 | 43.44 | 55.47 | 66.95 | 77.33 | 79.35 | 78.18 | 69.03 | 60.03 | 43.00 | 30.89 | 51.35 | |||||||||||||
MIN | 2.03 | 8.70 | 18.56 | 37.38 | 51.64 | 62.40 | 65.03 | 65.42 | 54.93 | 42.98 | 21.34 | 10.23 | 42.00 | |||||||||||||
YRS | 60 | 66 | 64 | 68 | 64 | 65 | 66 | 67 | 66 | 66 | 62 | 61 | 43 |