YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.38 | d | 28.18 | 32.78 | j | |
1959 | 26.71 | 26.00 | 36.53 | 46.83 | 57.61 | 71.43 | 73.34 | 76.15 | 61.98 | 47.52 | 34.80 | 34.97 | 49.49 | |||||||||||||
1960 | 23.37 | 21.26 | 33.37 | 50.97 | 56.58 | 66.42 | 73.90 | 74.40 | 65.77 | 53.61 | 39.28 | 29.50 | 49.04 | |||||||||||||
1961 | 30.55 | 35.52 | 38.42 | 43.27 | 54.82 | 68.43 | 73.11 | 73.65 | 59.95 | 52.19 | 36.27 | 27.53 | 49.48 | |||||||||||||
1962 | 21.76 | 31.21 | 34.98 | 51.37 | 62.42 | 65.70 | 71.27 | 72.71 | 62.30 | 55.19 | 42.75 | 32.76 | 50.37 | |||||||||||||
1963 | 16.45 | 37.04 | 40.35 | 51.17 | 61.60 | 72.84 | a | 78.35 | 74.02 | 68.02 | 59.84 | 40.60 | 25.71 | 52.17 | ||||||||||||
1964 | 31.68 | 28.10 | 33.06 | 47.47 | 61.19 | 67.07 | 78.32 | 72.19 | 64.22 | 53.03 | a | 39.30 | 29.90 | 50.46 | ||||||||||||
1965 | 33.48 | 28.43 | 27.15 | 53.02 | 59.97 | 65.68 | 73.23 | 70.89 | 55.72 | 56.55 | 43.45 | 32.48 | 50.00 | |||||||||||||
1966 | 20.35 | 23.00 | 41.74 | 45.47 | 61.53 | 67.88 | 77.52 | 69.37 | 63.02 | 52.61 | 39.45 | 28.68 | 49.22 | |||||||||||||
1967 | 32.58 | 33.70 | 43.11 | 50.65 | 53.58 | 63.80 | 72.27 | 70.79 | 64.15 | 54.50 | 37.87 | 24.02 | 50.08 | |||||||||||||
1968 | 26.42 | 33.71 | 42.65 | 46.10 | a | 54.03 | 70.72 | 73.85 | 71.15 | 63.23 | 54.60 | 37.12 | 24.29 | 49.82 | ||||||||||||
1969 | 24.29 | 31.22 | a | 32.10 | 52.08 | 59.90 | 62.60 | 74.50 | 74.47 | 67.17 | 43.31 | 39.52 | 31.77 | 49.41 | ||||||||||||
1970 | 28.45 | 37.29 | 31.61 | 44.13 | 61.48 | 66.73 | 74.63 | 77.29 | 62.85 | 48.45 | 38.83 | 30.10 | 50.15 | |||||||||||||
1971 | 27.27 | 28.88 | 35.60 | a | 48.67 | a | 55.39 | 69.73 | 71.39 | 74.73 | 60.80 | 50.08 | 39.13 | 29.13 | 49.23 | |||||||||||
1972 | 24.42 | 36.43 | 45.77 | 48.92 | 58.16 | 69.33 | a | 71.00 | 72.19 | 62.73 | 49.92 | 29.75 | 19.60 | 49.02 | ||||||||||||
1973 | 25.00 | a | 31.73 | 39.56 | 44.45 | 56.69 | 68.10 | 73.42 | 75.58 | 60.35 | 53.48 | 37.65 | 28.37 | 49.53 | ||||||||||||
1974 | 21.05 | 34.75 | 43.18 | a | 49.93 | 61.32 | 69.45 | 77.78 | a | 69.52 | 61.43 | 55.63 | a | 38.63 | 30.10 | a | 51.07 | |||||||||
1975 | 29.29 | 29.45 | 35.26 | 46.57 | a | 57.65 | 65.67 | 75.21 | 73.84 | 62.05 | 54.98 | 34.55 | 31.73 | 49.69 | ||||||||||||
1976 | 27.69 | 38.34 | a | 37.50 | 49.08 | 57.18 | 69.10 | a | 76.53 | 74.39 | 64.57 | 48.19 | 36.00 | 33.61 | 51.02 | |||||||||||
1977 | 22.26 | 37.18 | 35.40 | 51.52 | a | 62.57 | a | 71.22 | 76.03 | 70.71 | 67.65 | 53.95 | 37.85 | 30.50 | 51.40 | |||||||||||
1978 | 18.63 | 21.39 | 40.07 | a | 48.85 | 55.73 | 69.60 | 75.61 | 72.40 | a | 67.63 | 53.11 | 35.38 | 19.90 | 48.19 | |||||||||||
1979 | 13.61 | 28.89 | 39.39 | 48.93 | 55.27 | 66.20 | 73.22 | a | 71.66 | 67.92 | 53.98 | b | 32.02 | 31.87 | 48.58 | |||||||||||
1980 | 23.31 | 29.19 | 33.87 | a | 46.27 | 56.57 | b | 70.62 | 77.82 | 74.18 | 66.88 | 51.98 | a | 40.58 | 37.21 | 50.71 | ||||||||||
1981 | 32.73 | 33.21 | 40.16 | 54.25 | 54.69 | 68.83 | 75.03 | a | 71.00 | 67.00 | 50.97 | a | 42.83 | 32.15 | 51.90 | |||||||||||
1982 | 23.68 | a | 30.64 | 38.39 | 46.82 | 56.21 | 62.79 | a | 73.52 | 74.02 | 63.33 | 50.82 | 34.53 | a | 30.56 | 48.78 | ||||||||||
1983 | 31.79 | 36.98 | 37.08 | 42.47 | 53.27 | 63.92 | 74.00 | 77.76 | 67.17 | a | 53.53 | 38.67 | a | 12.52 | 49.10 | |||||||||||
1984 | 22.31 | b | 32.91 | a | 37.90 | 41.58 | 59.03 | 68.12 | 74.73 | 76.37 | 61.57 | 48.02 | 39.95 | 26.47 | 49.08 | |||||||||||
1985 | 22.42 | a | 26.16 | 42.25 | a | 52.02 | 61.18 | 67.38 | 75.19 | 72.15 | 60.27 | 50.10 | 25.85 | 20.69 | b | 47.97 | ||||||||||
1986 | 29.37 | 31.34 | 46.10 | 49.82 | 57.47 | a | 70.88 | a | 76.19 | 73.13 | 62.33 | 51.24 | 37.97 | 30.32 | 51.35 | |||||||||||
1987 | 31.19 | 36.70 | 35.35 | 53.32 | 61.29 | 69.38 | 74.43 | a | 71.60 | a | 63.52 | 51.39 | 38.93 | 28.13 | 51.27 | |||||||||||
1988 | 19.35 | 30.53 | 38.55 | a | 49.43 | 59.98 | 73.48 | 74.79 | 75.06 | 63.73 | 53.44 | 39.25 | 30.95 | a | 50.71 | |||||||||||
1989 | 32.42 | 21.02 | a | 40.21 | 51.47 | 61.24 | 66.45 | a | 75.39 | 71.69 | 61.83 | 52.26 | 41.87 | 24.81 | 50.05 | |||||||||||
1990 | 31.92 | 30.19 | a | 40.18 | 49.08 | 56.37 | 73.13 | 73.18 | 73.19 | 68.07 | 52.77 | 40.43 | 22.84 | 50.95 | ||||||||||||
1991 | 25.45 | 39.77 | 41.94 | 49.00 | 60.98 | a | 69.55 | 74.85 | a | 73.65 | 65.18 | 51.45 | 35.02 | a | 32.65 | a | 51.62 | |||||||||
1992 | 28.85 | a | 39.48 | 44.05 | a | 52.20 | 60.61 | 65.05 | 69.55 | 68.35 | 65.07 | 52.15 | 33.45 | 21.55 | 50.03 | |||||||||||
1993 | 22.81 | 22.43 | 39.53 | 46.95 | 58.73 | 65.60 | 71.82 | 70.56 | 61.08 | 50.35 | 33.50 | 32.16 | 47.96 | |||||||||||||
1994 | 28.84 | 26.79 | 44.05 | 49.80 | 64.11 | 73.67 | 73.05 | 75.71 | 67.50 | 51.74 | 36.46 | b | 32.34 | 52.00 | ||||||||||||
1995 | 27.82 | 36.95 | 40.06 | 44.41 | a | 52.23 | 65.75 | 73.61 | 76.76 | 64.25 | 49.79 | 42.15 | 32.75 | a | 50.54 | |||||||||||
1996 | 24.71 | 35.19 | 35.61 | 50.18 | 57.29 | 69.50 | a | 73.44 | 70.42 | 61.55 | 52.34 | 34.65 | 31.13 | 49.67 | ||||||||||||
1997 | 24.68 | a | 31.79 | 43.13 | 43.67 | 58.35 | 68.83 | 75.74 | 73.44 | 67.53 | 52.75 | a | 37.12 | 29.84 | 50.57 | |||||||||||
1998 | 31.87 | 36.17 | a | 36.53 | 48.33 | 61.74 | 65.10 | 75.85 | 72.90 | 70.35 | 50.60 | 41.33 | 28.87 | 51.64 | ||||||||||||
1999 | 34.10 | a | 40.61 | 42.24 | 46.14 | a | 57.85 | 68.00 | 77.45 | 73.21 | 60.50 | 52.47 | 46.48 | a | 35.48 | 52.88 | ||||||||||
2000 | 31.82 | 37.97 | 43.00 | 51.00 | 62.84 | 69.37 | 78.77 | 78.13 | a | 66.12 | 52.98 | a | 30.40 | 26.42 | 52.40 | |||||||||||
2001 | 31.65 | 28.48 | 39.87 | 51.17 | a | 58.90 | b | 70.20 | 79.15 | 75.50 | 66.41 | c | 51.86 | b | 41.02 | 29.32 | a | 51.96 | ||||||||
2002 | 30.90 | b | 34.48 | 34.23 | a | 52.12 | 58.00 | 75.03 | 78.56 | 73.82 | 64.73 | 45.40 | 39.03 | 34.61 | 51.74 | |||||||||||
2003 | 35.10 | a | 28.43 | 42.67 | a | 50.97 | 57.58 | 65.87 | 80.71 | 76.30 | a | 62.91 | a | 57.55 | a | 36.77 | 32.74 | b | 52.30 | |||||||
2004 | 30.65 | 31.50 | 45.90 | 50.78 | 61.61 | 65.18 | b | 72.64 | b | 70.21 | 66.62 | 53.31 | 38.03 | 33.00 | 51.62 | |||||||||||
2005 | 29.79 | 37.61 | 41.26 | 49.10 | 58.67 | a | 68.26 | a | 77.81 | 72.87 | 67.88 | 52.55 | 44.05 | 29.76 | 52.47 | |||||||||||
2006 | 38.77 | 29.69 | a | 38.15 | 54.10 | 62.31 | 73.77 | 79.27 | a | 74.16 | 59.22 | 49.47 | a | 39.68 | 30.23 | a | 52.40 | |||||||||
2007 | 19.18 | 26.48 | a | 48.60 | b | 47.12 | b | 60.55 | b | 68.77 | 76.27 | 76.89 | 67.40 | 53.40 | a | 41.10 | 21.06 | 50.57 | ||||||||
2008 | 23.06 | 30.00 | 38.37 | 44.58 | 55.45 | 65.82 | 75.95 | a | 70.89 | 61.08 | 49.58 | 40.62 | 23.53 | 48.24 | ||||||||||||
2009 | 29.81 | 34.34 | 38.15 | 44.38 | 56.82 | 65.23 | 71.39 | 69.63 | 60.93 | 40.13 | 40.93 | 19.94 | 47.64 | |||||||||||||
2010 | 27.52 | 25.98 | a | 38.03 | b | 48.12 | a | 53.85 | 68.70 | 74.85 | 74.02 | a | 64.41 | b | 52.96 | c | 36.45 | a | 31.08 | a | 49.67 | |||||
2011 | 26.35 | d | 24.69 | a | 38.19 | b | 46.00 | a | 52.90 | 66.79 | a | 77.18 | 76.05 | 61.75 | 51.03 | 38.52 | a | 29.03 | 49.04 | |||||||
2012 | 31.34 | 28.00 | 48.09 | c | 52.62 | a | 60.65 | 75.02 | 79.35 | 73.68 | 64.97 | 48.38 | b | 42.28 | 28.77 | 52.76 | ||||||||||
2013 | 26.27 | a | 29.07 | 35.79 | 41.13 | 56.88 | a | 70.07 | 73.50 | 74.08 | a | 67.72 | 47.61 | 37.28 | 26.68 | 48.84 | ||||||||||
2014 | 29.81 | 20.07 | 37.40 | 46.55 | 56.76 | 66.28 | 73.44 | 72.92 | 63.06 | e | 53.65 | 33.20 | 26.35 | 48.29 | ||||||||||||
2015 | 27.85 | 31.20 | 43.78 | a | 48.63 | 53.11 | 69.38 | a | 74.24 | 71.81 | 68.28 | 53.18 | a | 36.76 | a | 27.11 | 50.45 | |||||||||
2016 | 26.24 | 34.26 | 42.66 | 47.32 | 54.13 | 71.57 | 74.11 | 70.85 | 64.53 | a | 55.29 | 43.60 | 23.92 | 50.71 | ||||||||||||
2017 | 23.95 | 37.38 | 45.77 | a | 49.60 | 56.27 | 70.22 | 77.48 | 70.60 | 65.37 | 50.81 | 41.72 | 28.05 | a | 51.43 | |||||||||||
2018 | 26.92 | 25.25 | 40.27 | 41.03 | 60.45 | a | 71.58 | 72.87 | 70.44 | 66.27 | 46.60 | 35.32 | 29.87 | 48.91 | ||||||||||||
2019 | 29.03 | 19.82 | 32.34 | 48.40 | 50.37 | 65.75 | 74.65 | 72.68 | 68.15 | 43.45 | 35.23 | 31.82 | 47.64 | |||||||||||||
2020 | 31.00 | 29.72 | 40.92 | 45.22 | 57.08 | 73.03 | 76.55 | 76.18 | 63.92 | 45.69 | 42.45 | 32.21 | 51.16 | |||||||||||||
2021 | 29.53 | 19.96 | 41.32 | 45.25 | 56.76 | 71.98 | 76.29 | 73.84 | 68.63 | 53.05 | 43.22 | 34.95 | 51.23 | |||||||||||||
2022 | 26.40 | 26.93 | 37.24 | 46.32 | 57.50 | 71.57 | 77.97 | 76.69 | 68.60 | 52.61 | 33.78 | 22.90 | 49.88 | |||||||||||||
2023 | 21.69 | 21.64 | 31.06 | 46.45 | 58.97 | 66.58 | 72.90 | 72.95 | 66.57 | 49.39 | 41.15 | 35.52 | a | 48.74 | ||||||||||||
2024 | 23.79 | 37.59 | 40.44 | 50.45 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.94 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.02 | 30.79 | 39.20 | 48.22 | 58.04 | 68.61 | 75.08 | 73.27 | 64.43 | 51.46 | 38.20 | 28.74 | 50.25 | |||||||||||||
S.D. | 4.77 | 5.54 | 4.28 | 3.22 | 3.03 | 2.97 | 2.38 | 2.28 | 2.95 | 3.37 | 3.73 | 4.65 | 1.38 | |||||||||||||
SKEW | -0.31 | -0.27 | -0.21 | -0.28 | -0.21 | 0.18 | 0.18 | 0.10 | -0.30 | -0.81 | -0.62 | -0.92 | 0.01 | |||||||||||||
MAX | 38.77 | 40.61 | 48.60 | 54.25 | 64.11 | 75.03 | 80.71 | 78.13 | 70.35 | 59.84 | 46.48 | 37.21 | 52.88 | |||||||||||||
MIN | 13.61 | 19.82 | 27.15 | 41.03 | 50.37 | 62.60 | 69.55 | 68.35 | 55.72 | 40.13 | 25.85 | 12.52 | 47.64 | |||||||||||||
YRS | 66 | 66 | 66 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 66 | 66 | 65 |