| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.00 | a | 83.61 | 76.31 | a | 67.68 | 46.29 | b | 35.00 | b | 65.81 | f | ||
| 1964 | 29.94 | 33.07 | a | 38.55 | ----- | z | ----- | z | ----- | z | 89.04 | c | 82.87 | a | 74.33 | 64.77 | 40.57 | 30.03 | 53.68 | c | ||||||
| 1965 | 30.39 | 35.04 | 37.16 | 53.73 | 61.17 | a | 70.67 | 82.84 | 79.19 | 63.13 | 67.14 | b | 46.43 | 30.58 | 54.79 | |||||||||||
| 1966 | 26.16 | 27.96 | 44.23 | 54.30 | 69.97 | 75.57 | 88.39 | 82.00 | 74.13 | 55.61 | 46.33 | 26.81 | 55.95 | |||||||||||||
| 1967 | 31.81 | 33.75 | 43.71 | 52.66 | a | 62.48 | 69.70 | 84.32 | 84.90 | 75.07 | 61.77 | 43.37 | 25.71 | 55.77 | ||||||||||||
| 1968 | 28.58 | 35.90 | 47.00 | f | 50.44 | e | 62.38 | b | 74.93 | 84.84 | f | 77.39 | m | 69.31 | d | 60.68 | f | 42.05 | j | 27.35 | h | 53.59 | f | |||
| 1969 | 31.77 | i | 29.33 | j | 31.65 | k | 58.27 | h | 72.86 | j | 71.90 | i | 86.10 | j | 87.52 | j | 74.85 | d | 51.80 | f | 49.17 | l | 38.76 | j | 74.85 | k |
| 1970 | 33.10 | j | 43.84 | i | 40.96 | g | 48.50 | h | 67.35 | k | 75.09 | h | 85.23 | i | 87.14 | j | 69.40 | e | 52.17 | a | 39.33 | 25.00 | 46.48 | h | ||
| 1971 | 28.33 | a | 33.21 | 38.48 | 52.47 | 62.97 | 75.20 | 83.19 | 86.16 | 68.83 | 54.81 | 32.57 | 21.67 | a | 53.16 | |||||||||||
| 1972 | 23.94 | 30.96 | b | 48.94 | 54.70 | 65.94 | 75.43 | ----- | z | 82.84 | 70.50 | b | ----- | z | 33.60 | 25.29 | 51.21 | b | ||||||||
| 1973 | 19.31 | b | ----- | z | 36.00 | 46.57 | 65.16 | 75.07 | 81.87 | 82.29 | 68.63 | 60.71 | 38.27 | 32.16 | 55.09 | a | ||||||||||
| 1974 | 25.48 | ----- | z | 45.94 | 55.67 | ----- | z | 79.33 | 82.81 | 81.81 | 74.23 | 62.60 | a | ----- | z | 31.32 | 59.91 | c | ||||||||
| 1975 | 29.68 | 34.57 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.23 | 39.83 | a | 35.23 | 39.31 | g | ||||
| 1976 | 31.39 | 30.69 | 35.00 | 52.77 | 66.77 | a | 72.93 | 85.52 | 78.77 | 72.50 | 58.77 | 47.37 | 37.00 | 55.79 | ||||||||||||
| 1977 | 30.23 | 43.11 | 39.39 | 58.50 | 61.16 | 81.59 | a | 82.65 | 78.19 | 72.03 | 60.10 | 42.20 | 34.13 | 56.94 | ||||||||||||
| 1978 | 29.68 | 31.64 | 44.45 | 52.87 | 59.10 | 72.53 | 84.26 | 79.19 | 69.70 | 63.48 | 36.71 | b | 20.87 | 53.71 | ||||||||||||
| 1979 | 14.80 | a | 25.79 | 37.16 | 52.70 | 63.58 | 74.90 | 84.19 | 79.97 | 77.07 | 63.03 | 35.53 | 32.90 | 53.47 | ||||||||||||
| 1980 | 25.55 | 30.69 | 37.19 | 52.17 | 60.26 | 74.37 | 82.90 | 79.52 | 70.77 | 59.13 | 42.43 | 40.13 | 54.59 | |||||||||||||
| 1981 | 36.94 | 39.43 | 46.55 | 56.87 | 61.23 | 74.33 | 83.94 | 84.58 | 75.30 | 53.55 | 46.83 | 37.03 | 58.05 | |||||||||||||
| 1982 | 25.94 | 30.00 | a | 41.58 | 47.40 | 62.71 | 72.93 | 79.84 | 83.23 | 66.80 | 53.19 | 37.27 | 26.74 | 52.30 | ||||||||||||
| 1983 | 33.68 | 35.11 | 41.81 | 45.20 | 56.81 | 70.03 | 79.94 | 82.74 | 71.40 | 59.90 | 38.48 | a | 19.10 | 52.85 | ||||||||||||
| 1984 | 18.61 | 23.52 | 35.32 | 45.90 | 63.39 | 72.13 | 83.32 | 81.65 | 68.13 | 50.45 | 37.57 | 24.42 | 50.37 | |||||||||||||
| 1985 | 22.19 | 26.96 | 38.52 | 57.23 | 66.94 | 76.57 | 85.10 | 80.71 | 64.40 | 56.81 | 32.53 | 23.29 | 52.60 | |||||||||||||
| 1986 | 26.84 | 31.71 | 49.23 | 51.67 | 62.23 | 79.13 | 78.10 | 82.23 | 64.17 | 56.82 | c | 42.97 | 33.74 | 54.90 | ||||||||||||
| 1987 | 25.50 | a | 36.50 | 41.39 | 61.53 | 66.48 | 74.40 | 79.45 | 78.45 | 74.60 | 62.87 | 42.43 | 29.60 | a | 56.10 | |||||||||||
| 1988 | 26.90 | 37.21 | 41.23 | 57.17 | 65.45 | 82.03 | 87.29 | 83.71 | 70.23 | 66.19 | 39.60 | 28.73 | a | 57.15 | ||||||||||||
| 1989 | 30.97 | 20.86 | 45.65 | 57.23 | 64.77 | 72.93 | 87.00 | 79.77 | 70.53 | 59.97 | a | 43.55 | j | 34.15 | k | 58.97 | b | |||||||||
| 1990 | 34.38 | j | 37.68 | c | 47.48 | 59.87 | 61.03 | 76.80 | 84.65 | 81.32 | 73.77 | 52.81 | 38.00 | 22.65 | e | 57.82 | a | |||||||||
| 1991 | 23.62 | b | 40.00 | 42.74 | 50.90 | 61.26 | 71.63 | 81.26 | 78.03 | 67.40 | 55.10 | 36.41 | c | 22.63 | a | 52.58 | ||||||||||
| 1992 | 24.50 | c | 34.62 | 51.84 | 62.90 | 70.23 | 75.70 | 77.52 | 77.35 | 62.13 | 51.71 | 27.48 | a | 14.93 | c | 52.58 | ||||||||||
| 1993 | 13.67 | a | 11.70 | a | 31.06 | 41.87 | 56.45 | 61.03 | 70.90 | 73.79 | b | 64.90 | 52.53 | a | 33.59 | a | 24.16 | 44.64 | ||||||||
| 1994 | 31.33 | a | 28.89 | 45.80 | a | 53.67 | 67.42 | 76.00 | 82.84 | 82.55 | 72.13 | 52.33 | a | 29.11 | c | 27.97 | 54.17 | |||||||||
| 1995 | 24.45 | 35.19 | a | 38.61 | 44.17 | 54.10 | a | 68.45 | a | 77.26 | 81.52 | 68.62 | a | 54.57 | a | 46.31 | a | 33.26 | 52.21 | |||||||
| 1996 | 33.46 | c | 33.45 | 39.79 | b | 49.30 | 56.48 | 74.87 | 81.77 | a | 79.87 | 63.27 | 49.71 | 37.60 | 26.65 | 52.18 | ||||||||||
| 1997 | 23.84 | 23.71 | 37.23 | 41.63 | 61.58 | 69.47 | 73.71 | 73.58 | 63.23 | 48.81 | 31.55 | a | 14.94 | 46.94 | ||||||||||||
| 1998 | 21.32 | 23.36 | 30.55 | 43.10 | 54.84 | 56.77 | 78.39 | 72.81 | 64.93 | a | 45.87 | 30.87 | 20.87 | 45.31 | ||||||||||||
| 1999 | 24.23 | 24.52 | a | 35.74 | 38.47 | 50.23 | 62.60 | 74.23 | 73.52 | 61.03 | 56.48 | 44.13 | 28.97 | 47.84 | ||||||||||||
| 2000 | 25.65 | 31.62 | 36.74 | 51.48 | a | 57.68 | 67.70 | 79.23 | 78.65 | 58.86 | a | 45.00 | 20.13 | 18.27 | a | 47.58 | ||||||||||
| 2001 | 18.90 | 21.56 | a | 35.13 | 44.10 | 58.35 | 66.40 | 75.87 | 75.45 | 65.33 | 48.48 | 33.20 | 14.13 | a | 46.41 | |||||||||||
| 2002 | 19.23 | a | 22.29 | 26.42 | 44.63 | 53.83 | a | 68.93 | 80.52 | 79.84 | 69.83 | 52.33 | a | 38.90 | 23.45 | 48.35 | ||||||||||
| 2003 | 27.29 | 18.63 | a | 32.30 | a | 47.20 | 58.35 | 66.86 | a | 82.10 | 76.84 | 63.77 | 57.90 | a | 24.96 | c | 24.24 | b | 48.37 | |||||||
| 2004 | 14.45 | b | 18.44 | b | 39.29 | 51.07 | b | 57.53 | a | 69.00 | c | 79.74 | 76.77 | 68.90 | 54.87 | 38.60 | 33.13 | a | 50.15 | |||||||
| 2005 | 26.74 | 26.32 | 39.60 | a | 53.43 | 60.65 | 70.17 | 85.29 | 79.29 | 70.33 | 58.80 | a | 43.82 | b | 29.00 | b | 53.62 | |||||||||
| 2006 | 30.90 | b | 31.50 | b | 39.55 | 56.87 | 66.81 | 78.90 | 86.35 | 79.84 | 66.90 | a | 53.43 | a | 39.96 | b | 29.83 | b | 55.07 | |||||||
| 2007 | 21.93 | c | 35.93 | a | 50.70 | a | 56.00 | a | 66.03 | a | 84.73 | o | 88.16 | 82.48 | 70.72 | a | 58.13 | 47.28 | a | 26.24 | b | 54.87 | a | |||
| 2008 | 20.08 | e | 27.11 | a | 34.28 | b | 48.00 | a | 60.89 | d | 71.80 | 85.48 | 81.68 | 69.76 | a | 56.87 | a | 46.17 | a | 31.14 | b | 52.77 | ||||
| 2009 | 36.76 | b | 35.89 | 42.60 | a | 51.76 | a | 63.84 | 68.67 | 81.43 | c | 78.97 | 74.60 | 48.63 | a | 46.86 | a | ----- | z | 57.27 | a | |||||
| 2010 | 30.70 | a | 32.29 | 45.30 | a | 50.43 | 55.39 | 69.12 | v | ----- | z | ----- | z | 75.40 | 60.58 | 40.89 | b | 30.71 | c | 46.85 | c | |||||
| 2011 | 24.83 | h | ----- | z | 38.06 | 45.68 | e | 55.23 | a | 70.07 | 81.48 | 83.68 | 73.77 | 57.74 | 36.04 | b | 27.81 | 56.96 | b | |||||||
| 2012 | 35.61 | 32.59 | 50.81 | 58.10 | 65.29 | 79.03 | 85.29 | 84.35 | 74.40 | 57.23 | 46.27 | 28.29 | 58.10 | |||||||||||||
| 2013 | 25.42 | 32.82 | 43.97 | 48.27 | 63.52 | 78.67 | 85.48 | 83.19 | 68.73 | 52.84 | 41.87 | 27.71 | 54.37 | |||||||||||||
| 2014 | 34.58 | 35.19 | a | 44.61 | 52.14 | a | 64.65 | 71.50 | 83.52 | 75.23 | 70.83 | 61.58 | 41.10 | 33.65 | 55.71 | |||||||||||
| 2015 | 37.06 | 42.71 | 52.97 | 54.87 | 59.39 | 79.97 | 78.65 | 80.13 | 75.17 | 61.94 | 39.20 | 26.65 | 57.39 | |||||||||||||
| 2016 | 25.71 | 37.59 | 43.90 | 53.13 | 59.87 | 80.07 | 83.61 | 81.10 | 69.93 | 58.52 | 45.14 | a | 28.48 | 55.59 | ||||||||||||
| 2017 | 17.97 | 30.70 | a | 44.74 | 51.17 | 64.10 | 76.17 | 85.61 | 80.71 | 68.20 | 54.97 | 45.57 | 38.29 | 54.85 | ||||||||||||
| 2018 | 36.68 | 32.41 | a | 43.52 | 54.70 | 67.10 | a | 78.07 | 86.97 | 81.39 | 76.67 | 53.74 | 39.77 | 26.55 | 56.46 | |||||||||||
| 2019 | 25.77 | 25.93 | 34.77 | 52.77 | 59.06 | 72.83 | 84.10 | 83.81 | 70.10 | 49.35 | 41.53 | 19.90 | 51.66 | |||||||||||||
| 2020 | 26.55 | 25.86 | 41.55 | 53.23 | 66.45 | 72.87 | 84.87 | 86.74 | 73.90 | 60.65 | 43.80 | 31.68 | 55.68 | |||||||||||||
| 2021 | 32.10 | 30.50 | 45.16 | 55.03 | 65.48 | 82.77 | 88.19 | 80.77 | 74.77 | 54.39 | 48.50 | 35.16 | 57.74 | |||||||||||||
| 2022 | 30.90 | 33.79 | 45.23 | 50.70 | 61.29 | 73.83 | 86.97 | 83.39 | 76.90 | 59.90 | 35.47 | 27.37 | a | 55.48 | ||||||||||||
| 2023 | 17.42 | 19.00 | 27.03 | 38.07 | 65.84 | 70.10 | 84.45 | 80.58 | 72.37 | 60.06 | 45.17 | 33.74 | 51.15 | |||||||||||||
| 2024 | 31.71 | 35.07 | 43.32 | 55.77 | 60.32 | 79.17 | 83.87 | 81.74 | 76.43 | 65.42 | 32.13 | 32.39 | 56.45 | |||||||||||||
| 2025 | 26.19 | 35.57 | 44.55 | 55.53 | 67.19 | 79.27 | 85.26 | 81.84 | 74.03 | 59.03 | 56.00 | u | ----- | z | 60.85 | b | ||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 26.72 | 30.74 | 40.94 | 51.55 | 61.91 | 73.44 | 82.75 | 80.54 | 70.30 | 56.85 | 39.41 | 27.95 | 53.19 | |||||||||||||
| S.D. | 5.82 | 6.39 | 5.82 | 5.40 | 4.33 | 5.19 | 3.84 | 3.11 | 4.43 | 5.23 | 6.12 | 5.88 | 3.49 | |||||||||||||
| SKEW | -0.25 | -0.63 | -0.25 | -0.49 | -0.39 | -0.70 | -0.88 | -0.61 | -0.49 | -0.07 | -0.80 | -0.33 | -0.79 | |||||||||||||
| MAX | 37.06 | 43.11 | 52.97 | 62.90 | 70.23 | 82.77 | 89.04 | 86.74 | 77.07 | 67.68 | 48.50 | 40.13 | 58.10 | |||||||||||||
| MIN | 13.67 | 11.70 | 26.42 | 38.07 | 50.23 | 56.77 | 70.90 | 72.81 | 58.86 | 45.00 | 20.13 | 14.13 | 44.64 | |||||||||||||
| YRS | 58 | 57 | 58 | 58 | 57 | 56 | 57 | 58 | 62 | 60 | 58 | 58 | 47 | |||||||||||||