| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1962 | ----- | z | 27.25 | b | 31.80 | a | 46.83 | 54.42 | 60.78 | 65.73 | 68.00 | 57.88 | 51.11 | 39.77 | b | 30.82 | 48.58 | a | ||||||||
| 1963 | 14.94 | 31.24 | a | 38.63 | a | 43.65 | 53.13 | 63.07 | 71.00 | 70.35 | 65.92 | e | 58.29 | 39.90 | 25.79 | 47.99 | ||||||||||
| 1964 | 28.79 | 26.12 | 27.85 | 41.98 | 54.56 | 61.35 | 73.50 | 67.18 | a | 58.47 | 51.92 | 35.82 | 26.42 | 46.16 | ||||||||||||
| 1965 | 31.32 | 26.12 | 20.27 | 44.12 | 51.32 | 59.55 | 68.16 | 65.92 | 45.98 | 53.81 | 41.12 | a | 34.42 | 45.18 | ||||||||||||
| 1966 | 20.10 | 26.00 | 37.58 | 37.67 | 55.98 | 63.58 | 74.48 | 65.02 | 60.41 | a | 48.61 | 36.33 | 28.98 | 46.23 | ||||||||||||
| 1967 | 29.21 | 28.68 | 34.71 | 42.65 | 47.32 | 58.08 | 70.35 | a | 70.00 | a | 60.63 | 49.97 | 35.62 | 23.82 | 45.92 | |||||||||||
| 1968 | 28.42 | 29.52 | 39.40 | 40.60 | 48.50 | 62.33 | a | 68.92 | 65.76 | 58.97 | 51.61 | 34.71 | b | 22.05 | 45.90 | |||||||||||
| 1969 | 21.90 | a | 28.77 | 28.21 | 48.50 | 57.35 | 57.35 | 69.32 | 73.65 | 65.28 | 39.69 | 39.08 | 30.97 | 46.67 | ||||||||||||
| 1970 | 23.11 | 32.41 | 27.82 | a | 37.82 | 55.73 | 67.17 | 72.68 | 72.53 | 58.87 | 43.40 | a | 34.05 | 28.40 | b | 46.16 | ||||||||||
| 1971 | 23.13 | a | 26.25 | 30.76 | 42.17 | 50.77 | 64.63 | 67.89 | 72.71 | 56.23 | f | 44.07 | b | 32.04 | d | 26.15 | 43.69 | a | ||||||||
| 1972 | 16.53 | 30.86 | 38.50 | 41.43 | 52.92 | a | 63.48 | 65.48 | 68.08 | 58.48 | 46.37 | 32.92 | 20.77 | a | 44.65 | |||||||||||
| 1973 | 27.28 | a | 32.34 | 36.29 | e | 40.12 | 51.87 | 63.50 | 69.63 | a | 71.35 | 56.81 | a | 50.82 | 33.84 | a | 29.15 | 46.92 | ||||||||
| 1974 | 24.63 | 33.61 | 36.73 | 44.57 | 52.53 | 66.10 | a | 75.02 | 66.40 | a | 57.28 | a | 52.58 | 36.30 | 31.31 | 48.09 | ||||||||||
| 1975 | 25.60 | 24.39 | 28.94 | 38.70 | ----- | z | 60.92 | 73.73 | 69.32 | 59.13 | 51.48 | 35.02 | 33.42 | 45.51 | a | |||||||||||
| 1976 | 27.10 | a | 34.84 | 32.55 | a | 44.47 | 55.27 | g | 62.87 | 71.95 | a | 69.69 | 62.52 | 45.05 | 32.98 | 30.87 | 46.81 | a | ||||||||
| 1977 | 19.42 | 33.57 | 33.39 | 47.78 | 57.71 | 66.62 | a | 71.09 | b | 64.03 | a | 61.02 | 49.95 | 34.28 | 25.05 | 46.99 | ||||||||||
| 1978 | 18.33 | b | 21.36 | 37.10 | a | 41.00 | 51.42 | 62.75 | 68.76 | b | 68.53 | 63.85 | 50.23 | a | 31.27 | 19.50 | 44.51 | |||||||||
| 1979 | 13.95 | a | 25.27 | 35.30 | a | 39.90 | 50.35 | a | 60.05 | 67.23 | 65.85 | 66.67 | 49.18 | 32.00 | 35.98 | 45.14 | ||||||||||
| 1980 | 21.26 | b | 28.21 | 31.63 | a | 44.15 | 52.34 | 65.40 | 73.23 | 65.68 | c | 60.35 | 47.98 | 38.62 | b | 33.38 | a | 46.85 | ||||||||
| 1981 | 34.71 | 29.25 | 38.80 | a | 49.23 | 50.05 | a | 61.97 | 69.44 | 68.37 | 62.52 | 46.52 | 42.90 | a | 28.05 | 48.48 | ||||||||||
| 1982 | 17.65 | a | 27.27 | 32.98 | 39.14 | b | 50.80 | a | 56.62 | 70.70 | a | 69.58 | a | 58.19 | a | 44.89 | 32.29 | a | 29.38 | a | 44.12 | |||||
| 1983 | 32.89 | 36.04 | 33.84 | 36.58 | 48.52 | 60.88 | 74.13 | 75.73 | 59.74 | a | 48.44 | 34.75 | 13.39 | 46.24 | ||||||||||||
| 1984 | 29.02 | 33.81 | 31.95 | a | 39.81 | a | 50.40 | 59.70 | b | 69.48 | 72.93 | a | 54.69 | a | 44.90 | a | 38.22 | 26.19 | 45.93 | |||||||
| 1985 | 23.50 | a | 23.96 | a | 36.73 | a | 50.21 | b | 60.65 | 61.60 | 73.35 | a | 67.52 | 54.53 | 46.02 | 20.22 | 24.53 | 45.24 | ||||||||
| 1986 | 36.82 | a | 27.64 | 42.33 | a | 41.80 | b | 51.90 | a | 66.60 | 70.00 | a | 67.90 | 52.22 | 47.15 | 34.26 | c | 32.67 | b | 47.61 | ||||||
| 1987 | 31.09 | b | 32.82 | 32.40 | a | 51.10 | a | 56.87 | 65.48 | 72.02 | a | 65.18 | a | 59.34 | a | 47.48 | 38.96 | b | 29.60 | a | 48.53 | |||||
| 1988 | 24.93 | b | 27.40 | 35.12 | k | 46.42 | 57.10 | a | 73.12 | 72.82 | 71.77 | a | 59.53 | a | 48.31 | 35.27 | 29.40 | a | 49.64 | a | ||||||
| 1989 | 30.95 | 14.93 | a | 32.42 | 42.29 | a | 53.56 | d | 62.74 | a | 73.47 | b | 69.43 | a | 59.76 | a | 46.68 | a | 35.47 | a | 23.18 | a | 45.41 | |||
| 1990 | 34.00 | j | 29.04 | b | 34.92 | 42.32 | 49.61 | 64.55 | 67.85 | 70.05 | 65.12 | a | 47.60 | a | 40.55 | a | 20.48 | 48.37 | a | |||||||
| 1991 | 22.81 | 37.02 | 36.65 | a | 42.88 | 52.90 | 65.11 | b | 68.92 | a | 71.23 | g | 59.64 | a | 46.11 | 31.07 | c | 34.16 | 45.21 | a | ||||||
| 1992 | 33.83 | b | 36.29 | 38.32 | 45.37 | 55.27 | 58.60 | 59.72 | a | 61.82 | a | 59.57 | 47.48 | 30.64 | a | 22.26 | 45.76 | |||||||||
| 1993 | 24.06 | 20.98 | 35.70 | a | 39.25 | 51.94 | 56.73 | 61.60 | 63.55 | 51.55 | 44.31 | 28.77 | 30.19 | 42.39 | ||||||||||||
| 1994 | 24.94 | 20.57 | 35.84 | 41.55 | a | 56.79 | 64.12 | a | 66.29 | 67.79 | 61.60 | 46.03 | 34.38 | 33.03 | 46.08 | |||||||||||
| 1995 | 31.10 | 29.31 | a | 32.81 | 34.60 | a | 45.32 | 58.68 | 67.62 | a | 71.17 | a | 56.72 | 43.97 | b | 35.42 | 29.97 | 44.72 | ||||||||
| 1996 | 19.92 | 28.48 | 25.39 | 42.03 | a | 45.89 | 63.69 | a | 66.98 | 69.17 | g | 54.75 | 45.19 | 27.47 | a | 23.98 | 40.34 | a | ||||||||
| 1997 | 22.52 | 28.34 | 36.53 | a | 34.85 | 46.45 | c | 62.45 | 65.71 | c | 64.98 | 60.62 | 48.96 | c | 34.05 | 30.97 | a | 44.70 | ||||||||
| 1998 | 27.71 | 33.04 | b | 27.93 | b | 42.67 | 52.74 | 54.14 | a | 68.89 | 67.62 | a | 64.95 | 45.77 | 37.07 | 26.90 | 45.79 | |||||||||
| 1999 | 28.47 | a | 34.00 | a | 36.92 | 38.24 | a | 49.88 | a | 59.38 | 69.06 | 68.89 | 53.81 | a | 49.35 | 46.83 | 32.98 | 47.32 | ||||||||
| 2000 | 29.03 | 35.61 | a | 37.38 | b | 42.16 | a | 53.73 | 60.03 | a | 69.85 | 71.67 | a | 61.37 | 49.32 | c | 26.07 | b | 21.84 | 46.50 | ||||||
| 2001 | 31.20 | a | 21.38 | c | 33.82 | 43.57 | 52.32 | a | 61.05 | 70.43 | a | 72.31 | 61.45 | b | 45.77 | 42.88 | a | 28.92 | 47.09 | |||||||
| 2002 | 27.27 | 31.85 | a | 22.89 | 39.68 | 46.98 | a | 65.57 | 73.55 | 66.47 | 58.82 | 36.93 | a | 37.27 | 32.48 | b | 44.98 | |||||||||
| 2003 | 28.92 | 23.25 | b | 31.82 | a | 44.26 | a | 50.77 | 57.55 | 72.76 | b | 71.68 | a | 56.83 | 51.70 | a | 30.42 | 32.57 | b | 46.04 | ||||||
| 2004 | 28.26 | b | 30.57 | 38.57 | b | 44.82 | 51.00 | 57.37 | 67.47 | a | 63.55 | a | 58.57 | 47.29 | b | 36.43 | a | 32.25 | a | 46.34 | ||||||
| 2005 | 28.83 | b | 33.15 | a | 35.16 | b | 42.93 | 48.61 | 62.72 | 71.16 | 66.42 | a | 63.10 | a | 48.94 | 38.78 | 25.71 | 47.13 | ||||||||
| 2006 | 36.37 | 25.66 | 32.27 | 46.75 | 54.26 | 65.02 | 74.30 | d | 67.13 | a | 54.58 | 43.00 | 36.25 | b | 31.05 | 47.22 | ||||||||||
| 2007 | 24.90 | 23.05 | 41.53 | 38.21 | a | 55.32 | 65.35 | 73.02 | a | 69.44 | 60.52 | 48.48 | 37.02 | a | 25.34 | 46.85 | ||||||||||
| 2008 | 23.66 | 27.28 | 31.50 | 38.70 | c | 48.81 | e | 58.34 | a | 68.40 | a | 66.69 | 56.28 | 44.95 | a | 38.03 | 20.74 | 43.62 | ||||||||
| 2009 | 27.32 | 29.20 | 34.65 | 38.55 | 51.73 | 57.48 | 64.61 | 64.73 | 61.07 | 35.16 | 42.29 | a | 18.30 | c | 43.76 | |||||||||||
| 2010 | 29.82 | a | 23.20 | 38.79 | 42.03 | 46.69 | 59.67 | 67.79 | 70.44 | 59.90 | 51.95 | 32.73 | 29.45 | 46.04 | ||||||||||||
| 2011 | 24.00 | 21.91 | 33.05 | 39.43 | 46.29 | 61.17 | 71.94 | 69.52 | 60.08 | 49.18 | 35.27 | 29.81 | 45.14 | |||||||||||||
| 2012 | 29.73 | 26.19 | 46.71 | 47.05 | 52.52 | 66.95 | 74.40 | 69.65 | 63.78 | 44.21 | 40.22 | 29.13 | 49.21 | |||||||||||||
| 2013 | 28.37 | 29.00 | 32.42 | 34.10 | 52.50 | 61.13 | 68.52 | 69.11 | 62.76 | a | 41.96 | d | 36.60 | 22.29 | 44.90 | |||||||||||
| 2014 | 26.45 | 17.96 | 32.52 | 41.58 | 51.19 | 58.45 | 67.24 | 65.98 | 59.12 | 50.37 | 30.27 | 30.73 | 44.32 | |||||||||||||
| 2015 | 31.47 | 28.04 | 41.56 | 44.00 | 46.63 | 63.02 | 68.48 | 67.98 | 64.17 | 50.81 | 35.85 | 29.66 | 47.64 | |||||||||||||
| 2016 | 31.68 | 34.50 | 39.34 | 43.85 | 51.47 | 68.15 | 70.12 | a | 66.60 | 58.85 | 52.08 | 45.18 | 21.29 | 48.59 | ||||||||||||
| 2017 | 24.92 | 33.77 | 38.90 | 42.10 | 51.61 | 63.73 | 72.21 | 65.79 | 58.97 | 46.02 | 39.25 | 24.89 | 46.85 | |||||||||||||
| 2018 | 30.13 | 18.79 | 33.82 | 37.75 | 56.06 | 63.38 | a | 67.97 | 66.52 | 59.29 | a | 43.34 | 33.25 | 29.69 | 45.00 | |||||||||||
| 2019 | 29.71 | 13.29 | 28.65 | 40.28 | 43.73 | 60.55 | 67.68 | 64.39 | 60.37 | 37.50 | 33.36 | a | 33.08 | a | 42.71 | |||||||||||
| 2020 | 29.50 | a | 26.59 | 34.81 | 39.02 | 49.18 | a | 66.32 | 69.75 | e | 71.23 | 59.98 | 42.13 | 41.79 | a | 33.42 | a | 46.98 | ||||||||
| 2021 | 30.10 | a | 15.39 | 36.39 | 40.40 | 48.65 | 67.45 | 72.50 | 69.11 | 63.12 | e | 49.68 | 41.21 | a | 30.15 | 47.01 | ||||||||||
| 2022 | 29.72 | a | 24.41 | a | 33.43 | b | 36.30 | 49.60 | 62.85 | 71.81 | 70.78 | a | 64.23 | b | 49.88 | c | 30.02 | 23.92 | 45.58 | |||||||
| 2023 | 26.87 | 28.75 | 25.06 | 37.28 | 54.07 | c | 61.02 | 67.27 | 67.77 | 61.83 | 44.35 | 38.52 | 34.92 | a | 45.64 | |||||||||||
| 2024 | 24.15 | 33.48 | 33.11 | 42.67 | a | 49.26 | 62.79 | a | 69.85 | 69.03 | 67.10 | 53.69 | 36.83 | 34.47 | 48.04 | |||||||||||
| 2025 | 22.16 | 18.86 | 38.53 | 42.15 | 52.26 | 62.35 | 67.68 | 67.42 | 62.58 | 49.24 | 40.68 | ----- | z | 47.63 | a | |||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 26.56 | 27.69 | 34.23 | 41.85 | 51.61 | 62.27 | 69.80 | 68.32 | 59.78 | 47.33 | 35.79 | 28.01 | 46.09 | |||||||||||||
| S.D. | 4.95 | 5.50 | 4.73 | 3.69 | 3.44 | 3.40 | 3.08 | 2.80 | 3.78 | 4.12 | 4.61 | 4.80 | 1.46 | |||||||||||||
| SKEW | -0.43 | -0.54 | -0.42 | 0.27 | 0.09 | 0.24 | -0.61 | 0.16 | -0.79 | -0.51 | -0.39 | -0.65 | -0.22 | |||||||||||||
| MAX | 36.82 | 37.02 | 46.71 | 51.10 | 60.65 | 73.12 | 75.02 | 75.73 | 67.10 | 58.29 | 46.83 | 35.98 | 49.21 | |||||||||||||
| MIN | 13.95 | 13.29 | 20.27 | 34.10 | 43.73 | 54.14 | 59.72 | 61.82 | 45.98 | 35.16 | 20.22 | 13.39 | 42.39 | |||||||||||||
| YRS | 62 | 64 | 63 | 64 | 62 | 64 | 64 | 62 | 63 | 64 | 64 | 63 | 55 | |||||||||||||