YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.37 | e | 29.37 | k |
1955 | 23.87 | 30.52 | 38.66 | 44.05 | 56.15 | 66.83 | 71.73 | 75.81 | 65.00 | 54.85 | 38.50 | 35.63 | 50.13 | |||||||||||||
1956 | 34.08 | 28.59 | 42.34 | 50.63 | 58.48 | 65.50 | 74.31 | 70.21 | 64.47 | 50.48 | 38.42 | 31.18 | 50.72 | |||||||||||||
1957 | 24.90 | 39.00 | 43.27 | 48.32 | 56.55 | 68.23 | 73.71 | 69.63 | 66.28 | 48.74 | 35.88 | 34.58 | 50.76 | |||||||||||||
1958 | 32.79 | 42.05 | 37.82 | 46.33 | 63.90 | 65.65 | 73.92 | 76.45 | 64.60 | 56.89 | 41.35 | 38.47 | 53.35 | |||||||||||||
1959 | 36.05 | 35.02 | 42.52 | 52.88 | 52.85 | 69.72 | 77.50 | 72.23 | 61.62 | 53.29 | 41.90 | 30.24 | 52.15 | |||||||||||||
1960 | 27.76 | 32.69 | 45.15 | 49.78 | 55.35 | 70.42 | 78.18 | 71.13 | 66.83 | 53.42 | 39.67 | 32.82 | 51.93 | |||||||||||||
1961 | 34.24 | 39.05 | 42.42 | 49.08 | 55.27 | 72.20 | 76.95 | 76.10 | 58.88 | 52.32 | 37.33 | 31.23 | 52.09 | |||||||||||||
1962 | 23.13 | 30.34 | 39.60 | 54.88 | 55.10 | 67.17 | 73.52 | 71.77 | 66.50 | 53.90 | 42.97 | 34.44 | 51.11 | |||||||||||||
1963 | 27.79 | 44.48 | 41.55 | 43.95 | 60.82 | 61.50 | 70.39 | 71.29 | 67.45 | 56.32 | 40.80 | 32.26 | 51.55 | |||||||||||||
1964 | 30.23 | 33.50 | 38.89 | 46.47 | 55.05 | 61.27 | 74.87 | 71.40 | 60.70 | 56.60 | 37.62 | 34.11 | 50.06 | |||||||||||||
1965 | 31.77 | 37.45 | 41.11 | 50.52 | 53.84 | 64.50 | 73.39 | 68.50 | 57.95 | 56.77 | 41.98 | 29.35 | 50.59 | |||||||||||||
1966 | 32.06 | 33.07 | 43.60 | 51.37 | 62.73 | 65.28 | 72.11 | 73.84 | 64.47 | 51.69 | 41.93 | 30.63 | 51.90 | |||||||||||||
1967 | 33.37 | 39.12 | 40.73 | 40.47 | 57.50 | 64.17 | 75.79 | 76.76 | 67.13 | 52.34 | 42.15 | 28.60 | 51.51 | |||||||||||||
1968 | 31.39 | 43.79 | 45.58 | 47.67 | 57.73 | 67.97 | 78.16 | 67.11 | 63.62 | 52.39 | 39.25 | 30.56 | 52.10 | |||||||||||||
1969 | 31.69 | 32.77 | 40.15 | 50.58 | 62.56 | 64.68 | 75.03 | 73.84 | 65.03 | 45.45 | 40.38 | 34.97 | 51.43 | |||||||||||||
1970 | 33.27 | 41.50 | 41.26 | 42.33 | 58.26 | 67.68 | 75.61 | 75.34 | 59.28 | 49.21 | 42.35 | 28.31 | 51.20 | |||||||||||||
1971 | 33.60 | 37.98 | 39.81 | 47.83 | 55.10 | 63.18 | 74.65 | 76.43 | a | 59.37 | 46.79 | 38.82 | 26.10 | 49.97 | ||||||||||||
1972 | 24.84 | 36.84 | 47.40 | 47.78 | 61.81 | 68.72 | 75.08 | 74.27 | 61.28 | 50.32 | 38.23 | 23.98 | 50.88 | |||||||||||||
1973 | 26.82 | 38.43 | 39.71 | 48.02 | 61.82 | 68.30 | 75.65 | 72.34 | 62.73 | 51.85 | 40.53 | 36.37 | 51.88 | |||||||||||||
1974 | 28.58 | 36.16 | 43.27 | 47.27 | 57.92 | 70.57 | 72.55 | 72.44 | 66.70 | 51.92 | 41.30 | 31.32 | 51.67 | |||||||||||||
1975 | 28.95 | 34.27 | 38.87 | 40.67 | 55.53 | 63.43 | 75.05 | 68.50 | 67.22 | 51.29 | 37.25 | 34.65 | 49.64 | |||||||||||||
1976 | 33.00 | 39.26 | 39.45 | 47.53 | 62.05 | 63.57 | 74.13 | 65.87 | 64.77 | 53.11 | 44.13 | 30.48 | 51.45 | |||||||||||||
1977 | 25.39 | 38.89 | 38.32 | 53.47 | 51.21 | 71.13 | 74.10 | 73.97 | 62.70 | 54.94 | 41.77 | 36.44 | 51.86 | |||||||||||||
1978 | 35.52 | 38.29 | 48.24 | 47.17 | 53.82 | 64.30 | 73.44 | 71.47 | 60.10 | a | 56.76 | 36.77 | 26.92 | 51.07 | ||||||||||||
1979 | 24.03 | 34.71 | 43.74 | 48.13 | 58.76 | 67.17 | 72.90 | 70.32 | 66.03 | 54.89 | 35.58 | 31.82 | 50.67 | |||||||||||||
1980 | 30.27 | 38.75 | a | 38.52 | 49.97 | 54.77 | 60.70 | ----- | z | 71.50 | ----- | z | ----- | z | 40.98 | d | 35.21 | 46.74 | c | |||||||
1981 | 34.70 | a | 36.70 | 42.87 | a | 52.00 | b | 55.52 | d | 67.73 | f | 73.55 | c | 75.62 | e | 66.62 | f | 47.27 | g | 42.82 | 38.40 | a | 50.24 | c | ||
1982 | 28.55 | b | 35.83 | b | 40.06 | 46.09 | c | 57.52 | d | 64.60 | f | 71.70 | i | 72.44 | d | 58.56 | d | 48.98 | a | 34.37 | c | 29.67 | e | 45.21 | b | |
1983 | 34.03 | a | 38.70 | a | 40.81 | b | 44.63 | 55.36 | c | 62.65 | 68.62 | a | 70.89 | 63.67 | a | 53.74 | 40.16 | a | 32.53 | a | 50.48 | |||||
1984 | 20.70 | a | 31.68 | a | 43.43 | b | 47.78 | g | 58.87 | 62.95 | b | 75.84 | 74.03 | 62.23 | 45.52 | 37.55 | 26.40 | 49.02 | a | |||||||
1985 | 23.45 | 30.05 | 36.82 | 52.42 | 59.17 | b | 70.84 | b | 76.47 | 68.32 | 55.22 | 48.98 | 29.90 | 24.25 | a | 47.99 | ||||||||||
1986 | 37.08 | 40.12 | 46.30 | a | 47.43 | 56.82 | 69.32 | 70.25 | a | 73.56 | 54.60 | 51.10 | 40.45 | a | 29.40 | 51.37 | ||||||||||
1987 | 26.61 | 36.23 | 39.93 | a | 54.05 | a | 58.98 | 66.83 | 69.19 | 71.97 | 66.00 | 56.77 | 40.48 | 29.85 | 51.41 | |||||||||||
1988 | 26.15 | a | 34.88 | a | 42.58 | a | 51.80 | 57.17 | b | 67.67 | a | 78.13 | 74.45 | 64.30 | b | 60.35 | a | 40.52 | 28.83 | d | 52.24 | |||||
1989 | 23.56 | 27.61 | 45.35 | a | 54.92 | 59.68 | a | 68.72 | 75.37 | 68.77 | 64.95 | 51.23 | 41.22 | 31.74 | 51.09 | |||||||||||
1990 | 33.02 | 31.55 | 45.60 | 56.38 | 55.60 | 66.13 | 75.89 | 71.98 | a | 68.05 | 54.45 | 40.08 | 18.52 | h | 54.43 | a | ||||||||||
1991 | 28.74 | 43.88 | 40.28 | a | 46.82 | 52.82 | a | 62.32 | 76.40 | 73.72 | a | 66.71 | a | 55.02 | 41.45 | b | 31.90 | 51.67 | ||||||||
1992 | 33.87 | 42.76 | 48.31 | 55.74 | a | 66.32 | 69.42 | 72.00 | 73.11 | 65.48 | 54.98 | 37.47 | 27.77 | 53.94 | ||||||||||||
1993 | 21.88 | a | 28.70 | 46.28 | a | 48.08 | 60.05 | 61.24 | a | 66.52 | 68.68 | 65.72 | 53.66 | 35.68 | b | 32.75 | a | 49.10 | ||||||||
1994 | 34.92 | 34.11 | 47.29 | 52.17 | 61.58 | 68.83 | a | 77.52 | 73.40 | 66.93 | 51.29 | 32.31 | a | 26.42 | a | 52.23 | ||||||||||
1995 | 34.90 | 44.68 | 41.71 | 46.98 | 55.08 | 63.10 | a | 72.37 | 70.71 | 65.58 | 52.05 | 47.64 | b | 35.65 | 52.54 | |||||||||||
1996 | 34.29 | 37.50 | 44.02 | 50.74 | a | 56.10 | 67.08 | 76.15 | 74.37 | 62.47 | 53.28 | a | 42.03 | a | 35.76 | 52.82 | ||||||||||
1997 | 31.25 | c | 36.89 | 47.74 | b | 48.31 | a | 64.52 | b | 65.33 | 73.33 | b | 73.92 | 66.75 | 52.50 | 43.83 | 30.79 | 52.93 | ||||||||
1998 | 37.30 | a | 35.88 | 42.98 | 47.72 | a | 52.19 | 61.12 | a | 77.39 | 76.26 | 65.92 | 50.42 | 39.18 | b | 27.58 | 51.16 | |||||||||
1999 | 33.19 | 36.68 | 41.90 | 46.05 | 56.40 | 65.20 | 75.48 | a | 71.58 | ----- | z | 54.13 | 45.05 | 31.98 | a | 50.70 | a | |||||||||
2000 | 33.97 | 38.98 | 41.65 | 52.60 | 58.63 | 69.55 | 72.77 | a | 73.94 | 62.55 | a | 50.13 | 34.32 | 31.26 | 51.69 | |||||||||||
2001 | 28.97 | 32.02 | 46.35 | 46.70 | 62.74 | 66.88 | 74.05 | 74.37 | 65.07 | 54.18 | a | 40.35 | ----- | z | 53.79 | a | ||||||||||
2002 | ----- | z | ----- | z | ----- | z | 50.43 | a | 56.71 | 67.75 | ----- | z | ----- | z | 65.21 | a | 50.26 | ----- | z | 36.26 | 54.44 | f | ||||
2003 | ----- | z | 34.66 | 44.42 | a | 45.28 | 59.02 | a | 69.60 | 78.74 | 73.19 | 65.78 | 57.17 | a | 36.20 | 34.65 | 54.43 | a | ||||||||
2004 | 31.00 | 36.03 | 53.93 | a | 52.33 | a | 57.42 | 67.45 | 75.05 | a | 71.68 | a | 63.72 | 51.32 | 38.88 | 34.85 | 52.81 | |||||||||
2005 | 26.76 | b | 33.96 | 49.26 | f | 49.12 | b | 58.61 | 60.79 | b | ----- | z | ----- | z | 59.98 | 51.06 | 40.07 | c | 33.27 | 45.96 | c | |||||
2006 | 35.74 | d | 34.02 | 35.27 | a | ----- | z | 59.79 | j | 67.81 | a | 74.39 | v | 68.74 | h | 71.23 | s | 44.18 | q | 41.87 | c | 28.61 | d | 40.55 | f | |
2007 | 28.37 | a | ----- | z | ----- | z | 49.65 | g | 59.37 | d | 67.52 | f | 75.25 | c | 71.62 | b | 60.18 | b | 46.83 | v | 40.19 | a | 29.84 | b | 52.12 | e |
2008 | 26.79 | b | 37.53 | 40.81 | b | 45.22 | a | 56.10 | b | 63.97 | k | 72.96 | c | 71.16 | l | 63.48 | b | 49.71 | c | 43.04 | b | 30.27 | a | 46.59 | b | |
2009 | 33.11 | d | 39.66 | 41.12 | b | 46.12 | b | 59.50 | 63.31 | c | ----- | z | 70.75 | i | 65.71 | a | 46.30 | d | 39.20 | g | ----- | z | 49.35 | d | ||
2010 | 41.15 | a | 45.64 | 41.04 | e | 46.21 | f | 49.46 | c | 62.85 | c | 72.29 | 67.91 | c | 62.11 | b | 56.85 | a | 41.50 | 44.28 | a | 53.19 | a | |||
2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.41 | s | 71.81 | d | 72.54 | d | 67.67 | 50.40 | b | 37.16 | a | 28.69 | b | 54.71 | f | |
2012 | 32.10 | 34.90 | 41.22 | m | ----- | z | 60.72 | h | 64.02 | 74.91 | b | 74.67 | a | 67.42 | 53.66 | 42.17 | a | 30.92 | 52.75 | c | ||||||
2013 | 16.77 | 34.16 | 43.81 | 49.88 | 58.29 | 68.50 | 76.67 | a | 72.15 | d | 62.70 | 46.87 | 40.83 | 23.27 | 49.49 | |||||||||||
2014 | 34.90 | 41.18 | 44.13 | 50.87 | 59.40 | 66.38 | 77.44 | 71.32 | 65.88 | a | 54.76 | 40.98 | a | 36.83 | a | 53.67 | ||||||||||
2015 | 35.63 | a | 42.14 | 49.19 | 49.29 | a | 58.00 | 72.08 | 72.71 | 73.18 | 66.33 | 58.10 | 36.17 | 31.63 | 53.70 | |||||||||||
2016 | 30.23 | 40.83 | 45.03 | 53.53 | 57.94 | 69.46 | b | 73.65 | 74.23 | 64.58 | 52.73 | 43.28 | 28.61 | 52.84 | ||||||||||||
2017 | 25.81 | 37.66 | 46.30 | a | 47.13 | 59.60 | 67.88 | 77.27 | 75.65 | 67.00 | f | 49.00 | 43.95 | 30.02 | 50.93 | a | ||||||||||
2018 | 39.94 | 34.05 | 41.50 | 51.27 | 59.87 | 66.28 | 76.81 | 73.48 | 63.88 | 50.58 | 37.93 | 31.74 | 52.28 | |||||||||||||
2019 | 33.79 | 31.02 | 40.31 | ----- | z | 54.52 | 63.32 | 74.32 | 75.23 | 61.59 | a | 44.40 | a | 40.42 | 32.94 | 50.17 | a | |||||||||
2020 | 35.52 | 36.69 | 41.65 | 50.48 | 59.11 | 66.96 | b | 74.18 | 74.79 | 67.15 | 52.98 | 38.40 | 31.00 | 52.41 | ||||||||||||
2021 | 33.76 | 35.16 | 41.31 | 52.08 | 57.95 | 72.95 | a | 80.08 | 73.15 | 66.75 | 50.87 | 42.45 | 30.94 | 53.12 | ||||||||||||
2022 | 32.37 | 35.39 | 44.69 | 46.92 | 53.35 | a | 66.68 | 77.89 | 78.23 | 69.12 | 56.82 | 32.14 | a | 29.47 | 51.92 | |||||||||||
2023 | 29.77 | 32.82 | 34.53 | 48.90 | 58.50 | a | 62.37 | 74.61 | 72.85 | 63.62 | 52.10 | 39.70 | 34.92 | 50.39 | ||||||||||||
2024 | 36.27 | 38.34 | 42.03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.88 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.75 | 36.53 | 42.54 | 48.99 | 57.71 | 66.34 | 74.55 | 72.66 | 63.97 | 52.39 | 39.73 | 31.58 | 51.54 | |||||||||||||
S.D. | 4.80 | 4.10 | 3.45 | 3.43 | 3.23 | 3.11 | 2.55 | 2.54 | 3.10 | 3.29 | 3.17 | 3.71 | 1.21 | |||||||||||||
SKEW | -0.49 | 0.09 | 0.45 | -0.13 | 0.13 | -0.02 | -0.55 | -0.41 | -0.98 | -0.20 | -0.64 | 0.41 | -0.39 | |||||||||||||
MAX | 41.15 | 45.64 | 53.93 | 56.38 | 66.32 | 72.95 | 80.08 | 78.23 | 69.12 | 60.35 | 47.64 | 44.28 | 53.94 | |||||||||||||
MIN | 16.77 | 27.61 | 34.53 | 40.47 | 49.46 | 60.70 | 66.52 | 65.87 | 54.60 | 44.40 | 29.90 | 23.27 | 47.99 | |||||||||||||
YRS | 67 | 67 | 65 | 62 | 66 | 64 | 63 | 64 | 64 | 65 | 67 | 67 | 50 |