YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.19 | 38.19 | k | |
1959 | 32.17 | a | 32.82 | 39.97 | 56.30 | 57.32 | 76.90 | 86.16 | 80.48 | 65.70 | 57.94 | 45.63 | 32.94 | 55.36 | ||||||||||||
1960 | 23.61 | 27.66 | 39.60 | a | 54.10 | 62.29 | 76.07 | 87.87 | 79.32 | 74.67 | 57.68 | 39.03 | 33.35 | 54.60 | ||||||||||||
1961 | 34.87 | 36.96 | 42.68 | 52.73 | 64.94 | 81.30 | 86.03 | 84.65 | 62.03 | 54.61 | 38.80 | 26.45 | 55.50 | |||||||||||||
1962 | 23.97 | 30.93 | 33.90 | 57.07 | 59.65 | 73.45 | a | 80.74 | 78.84 | 73.40 | 61.45 | 45.47 | 35.26 | 54.51 | ||||||||||||
1963 | 24.71 | 44.25 | 44.80 | a | 48.67 | 64.13 | 66.57 | 81.71 | 82.77 | 74.43 | 62.55 | 38.90 | 29.00 | 55.21 | ||||||||||||
1964 | 26.00 | 27.86 | 33.13 | 48.93 | 62.77 | 66.04 | b | 85.43 | a | 79.10 | 69.27 | 63.35 | 37.73 | 29.10 | 52.39 | |||||||||||
1965 | 31.26 | 33.04 | 37.42 | 52.50 | 59.39 | 70.07 | 80.48 | 76.23 | 62.57 | 65.06 | 44.38 | a | 30.84 | 53.60 | ||||||||||||
1966 | 27.84 | 30.11 | 41.00 | a | 54.40 | 70.77 | 72.93 | 85.48 | 82.06 | 75.23 | 57.87 | 42.17 | 27.71 | 55.63 | ||||||||||||
1967 | 31.48 | 34.54 | 38.48 | 44.97 | 63.87 | 67.87 | 85.00 | 86.71 | 76.87 | 58.48 | 43.73 | 26.00 | 54.83 | |||||||||||||
1968 | 27.65 | 36.45 | 46.29 | 48.75 | b | 61.67 | g | 72.73 | 86.13 | 73.65 | ----- | z | 57.90 | 37.87 | 28.03 | 51.54 | b | |||||||||
1969 | 30.03 | 29.25 | 34.97 | 53.43 | 70.87 | a | 70.40 | 83.32 | 86.71 | 74.20 | 51.90 | 44.43 | 33.77 | a | 55.27 | |||||||||||
1970 | 30.41 | b | 41.12 | c | 40.03 | 45.07 | 64.60 | a | 74.48 | a | 83.93 | c | 86.33 | a | 62.48 | a | 51.52 | 37.00 | b | 23.62 | b | 53.38 | ||||
1971 | 26.73 | a | 29.21 | 31.65 | 46.27 | 64.58 | 70.30 | 84.32 | 86.90 | b | 65.38 | a | 53.94 | 38.43 | 26.39 | 52.01 | ||||||||||
1972 | 26.42 | 33.03 | 47.71 | 51.63 | 67.00 | 75.60 | 82.90 | 83.74 | 66.13 | 56.42 | 37.40 | 24.87 | 54.41 | |||||||||||||
1973 | 25.45 | 31.46 | 36.77 | 49.03 | 66.90 | a | 75.40 | 83.37 | a | 82.58 | 70.47 | 59.29 | 36.86 | a | 32.52 | 54.18 | ||||||||||
1974 | 26.13 | a | 33.89 | 40.68 | 55.30 | 63.52 | 81.90 | a | 83.84 | 79.68 | c | 75.48 | a | 60.97 | a | 41.67 | 30.10 | 56.10 | ||||||||
1975 | 27.42 | 28.96 | d | 37.35 | 41.70 | 59.06 | 70.64 | e | 85.68 | 78.97 | b | 75.17 | 54.06 | 36.37 | 35.93 | a | 52.61 | |||||||||
1976 | 31.10 | 33.07 | 36.65 | 51.80 | 67.32 | 70.93 | 84.71 | 76.90 | 74.07 | 59.23 | 48.67 | 36.29 | 55.89 | |||||||||||||
1977 | 29.00 | a | 40.04 | 40.10 | 62.14 | a | 58.10 | 80.00 | 83.26 | 81.60 | a | 70.57 | 61.67 | a | 40.77 | 33.87 | 56.76 | |||||||||
1978 | 32.23 | 35.46 | 44.77 | ----- | z | 60.33 | a | 73.92 | d | 83.61 | c | 79.16 | 67.07 | 62.39 | 38.60 | 23.13 | 54.61 | a | ||||||||
1979 | 18.52 | 30.37 | a | 38.35 | 51.93 | 65.00 | 76.19 | d | 84.34 | b | 79.93 | a | 78.00 | 63.29 | c | 38.27 | 34.17 | a | 54.86 | |||||||
1980 | 32.43 | q | 39.93 | n | 40.20 | a | ----- | z | 61.10 | 72.76 | a | 83.32 | 79.39 | 71.13 | 60.26 | 42.21 | a | 36.57 | c | 60.77 | c | |||||
1981 | 36.86 | b | 36.04 | 47.69 | b | 57.00 | b | 62.20 | a | 73.73 | 86.16 | 90.00 | 76.23 | 54.74 | 42.58 | f | 33.63 | a | 59.48 | a | ||||||
1982 | 26.60 | a | 33.14 | g | 41.55 | b | 48.68 | b | 62.80 | a | 72.19 | c | 77.81 | 83.26 | 68.15 | c | 53.95 | j | 33.39 | l | 27.90 | a | 56.55 | c | ||
1983 | 32.93 | b | 33.50 | b | 40.20 | a | 45.46 | b | 63.44 | d | 70.38 | a | 81.40 | k | 82.74 | h | 71.56 | c | 59.70 | k | 34.69 | q | 22.48 | b | 47.49 | d |
1984 | 24.17 | a | 30.15 | b | 37.97 | b | 50.00 | f | 62.37 | d | 69.93 | a | 82.53 | a | 83.19 | 69.90 | a | 54.62 | j | 37.39 | g | 26.70 | h | 57.53 | d | |
1985 | 27.20 | a | 25.39 | 36.28 | b | 55.62 | d | 67.57 | a | 78.86 | b | 87.27 | a | 80.39 | 62.23 | d | 56.54 | g | 32.78 | c | 25.52 | 52.64 | a | |||
1986 | 33.73 | a | 36.11 | 49.26 | d | 54.79 | a | 66.43 | a | 82.33 | c | 79.63 | a | 86.03 | 61.12 | f | 58.96 | h | 43.50 | j | 34.62 | g | 61.04 | d | ||
1987 | 29.08 | e | 37.21 | d | 46.12 | g | 66.41 | c | 70.96 | h | ----- | z | 80.50 | e | 82.33 | d | 80.11 | k | 67.90 | k | 43.39 | l | 31.17 | g | 59.11 | g |
1988 | 28.88 | g | 38.52 | d | 45.88 | f | 70.84 | k | 73.25 | o | 85.78 | l | 89.25 | g | 86.74 | l | 73.33 | c | 71.94 | m | 36.16 | k | 27.17 | g | 55.93 | j |
1989 | 23.88 | n | 27.50 | b | 42.21 | c | 63.58 | k | 66.00 | t | 79.27 | s | 89.74 | h | 81.74 | d | 72.04 | g | 61.00 | m | 44.50 | j | 34.71 | g | 50.49 | i |
1990 | 32.45 | b | 32.31 | l | 48.00 | h | 60.95 | i | 63.04 | f | 75.48 | i | 85.74 | ----- | z | 79.52 | g | 61.53 | n | 44.68 | e | 23.79 | b | 46.67 | h | |
1991 | 28.86 | c | 48.07 | a | 43.27 | a | 53.41 | h | 60.15 | d | 73.92 | f | 87.09 | i | 86.72 | m | 77.35 | m | 59.68 | f | 36.79 | a | 33.93 | q | 43.43 | g |
1992 | 33.00 | i | 43.29 | e | 55.52 | f | 65.60 | j | 74.30 | d | 78.97 | 82.68 | 86.23 | a | 74.27 | 64.50 | a | 34.93 | a | 25.90 | 62.79 | c | ||||
1993 | 27.61 | c | 29.52 | a | 40.19 | 50.60 | 69.40 | a | 69.39 | b | 73.55 | i | 79.24 | b | 73.17 | 59.58 | 38.35 | d | 30.43 | c | 51.59 | a | ||||
1994 | 35.70 | a | 32.96 | 52.41 | b | 59.40 | 70.03 | 80.53 | 88.61 | 88.26 | 79.41 | c | 56.80 | a | 31.40 | 28.70 | a | 58.69 | ||||||||
1995 | 28.30 | d | 40.04 | 41.45 | 54.57 | b | 60.74 | ----- | z | 83.13 | a | 85.57 | c | 75.88 | e | ----- | z | 50.00 | c | ----- | z | 57.74 | c | |||
1996 | 30.25 | k | 37.33 | b | 46.12 | f | 55.09 | h | 63.47 | a | 82.33 | f | 90.41 | b | 87.36 | f | 72.00 | c | 52.09 | t | 45.41 | c | 30.00 | f | 61.72 | g |
1997 | 30.75 | k | 35.43 | g | 48.45 | k | 51.21 | f | 71.59 | b | 76.70 | c | 84.43 | a | 84.91 | h | 74.91 | h | 57.04 | f | 42.62 | f | 29.71 | 65.61 | h | |
1998 | 34.03 | b | 35.44 | a | 41.56 | d | 55.04 | c | 63.55 | b | 69.10 | 88.80 | a | 85.10 | 75.73 | 57.94 | 38.34 | a | 26.60 | a | 55.94 | |||||
1999 | 30.65 | 30.07 | 39.77 | a | 51.17 | 60.00 | 72.14 | a | 83.73 | a | 84.21 | b | 72.17 | 62.81 | 49.73 | 32.48 | b | 55.74 | ||||||||
2000 | 28.97 | a | 36.66 | 42.94 | 59.66 | a | 65.10 | 78.28 | a | 87.57 | a | 86.93 | a | 71.55 | a | 55.83 | a | 31.62 | a | 28.97 | a | 56.17 | ||||
2001 | 26.32 | 28.04 | a | 45.14 | c | 53.13 | 71.31 | b | 75.86 | b | 83.97 | b | 87.57 | a | 77.30 | 60.16 | 45.52 | a | 24.03 | a | 56.53 | |||||
2002 | 24.42 | 26.71 | 34.23 | 54.03 | 65.03 | a | 77.55 | a | 89.00 | a | 81.13 | 72.89 | b | 55.52 | 40.80 | 32.35 | 54.47 | |||||||||
2003 | 35.03 | 34.11 | 45.03 | 51.47 | 65.87 | 76.50 | 90.86 | b | 87.55 | 74.18 | b | 64.76 | b | 35.79 | a | 32.47 | a | 57.80 | ||||||||
2004 | 25.17 | b | 27.66 | 47.48 | 58.80 | 62.30 | a | 75.37 | 84.03 | 80.81 | 69.86 | a | 56.38 | e | 42.29 | f | 32.81 | e | 56.42 | a | ||||||
2005 | 30.86 | b | 31.93 | 44.69 | b | 54.58 | d | 62.41 | b | 68.70 | c | 86.50 | a | 84.48 | 72.48 | a | 60.10 | 42.17 | 28.07 | a | 55.58 | |||||
2006 | 30.14 | b | 30.39 | 38.45 | 53.76 | a | 68.53 | a | 78.17 | 89.13 | 82.10 | a | 71.37 | 55.77 | a | 40.33 | 30.90 | 55.75 | ||||||||
2007 | 27.87 | 36.75 | 50.17 | b | 57.33 | 69.87 | 78.46 | b | 91.73 | a | 84.46 | c | 72.17 | 55.42 | 44.17 | 26.52 | b | 57.91 | ||||||||
2008 | 23.29 | 29.86 | 36.93 | d | 50.65 | d | 65.28 | b | 73.85 | c | 86.73 | e | 85.58 | 74.70 | 60.47 | a | 49.03 | 33.07 | b | 55.79 | ||||||
2009 | 35.87 | 34.11 | 40.03 | 54.13 | 66.58 | 69.23 | 84.87 | 83.00 | b | 80.17 | 52.81 | 43.76 | a | 25.23 | 55.82 | |||||||||||
2010 | 31.57 | a | 32.71 | 41.74 | 52.50 | 56.77 | 70.17 | 83.35 | 82.03 | a | 75.00 | 62.29 | 35.81 | c | 31.57 | a | 54.63 | |||||||||
2011 | 26.57 | a | 29.21 | 38.61 | c | 46.70 | 59.26 | 70.23 | 84.94 | 85.10 | a | 77.97 | a | 57.71 | 38.33 | 32.52 | 53.93 | |||||||||
2012 | 33.13 | 34.45 | 44.67 | a | 60.20 | 66.26 | 77.69 | a | 87.97 | 87.65 | 77.13 | 58.67 | a | 44.30 | 31.87 | 58.66 | ||||||||||
2013 | 24.97 | a | 32.75 | 44.26 | 54.47 | 66.35 | 78.73 | 89.94 | 87.77 | 72.17 | 56.10 | 44.60 | 26.52 | 56.55 | ||||||||||||
2014 | 36.45 | 36.36 | 47.45 | 55.20 | 68.77 | 74.57 | 89.11 | c | 78.65 | 75.27 | 63.32 | 40.27 | 34.61 | 58.34 | ||||||||||||
2015 | 32.84 | 45.07 | 55.45 | 57.77 | 64.52 | 83.07 | 82.71 | c | 84.52 | 76.20 | 64.39 | 37.30 | 27.81 | 59.30 | ||||||||||||
2016 | 27.58 | 35.79 | 43.84 | 61.90 | 64.03 | 80.77 | 84.52 | 84.45 | 70.57 | 55.94 | 48.70 | 24.16 | 56.85 | |||||||||||||
2017 | 22.84 | 33.71 | 45.34 | b | 52.90 | 67.06 | 77.38 | a | 90.06 | 85.53 | a | 70.50 | 53.26 | 42.80 | 31.65 | 56.09 | ||||||||||
2018 | 35.90 | 33.46 | 39.61 | 53.60 | 67.42 | 73.73 | 88.25 | c | 83.65 | 73.97 | 54.81 | 40.41 | c | 25.55 | 55.86 | |||||||||||
2019 | 27.03 | 23.46 | b | 36.64 | f | 51.00 | 59.06 | 70.73 | 83.81 | 83.87 | 66.69 | a | 44.97 | a | 40.77 | 24.60 | a | 52.36 | a | |||||||
2020 | 25.74 | 27.83 | 38.94 | 51.83 | 63.52 | 70.03 | a | 82.00 | a | 85.13 | 75.34 | a | 57.06 | 36.30 | 29.06 | 53.57 | ||||||||||
2021 | 26.06 | 28.32 | 41.84 | 52.87 | 62.68 | 83.40 | 91.10 | a | 79.35 | 73.21 | a | 53.03 | 40.43 | 26.84 | 54.93 | |||||||||||
2022 | 23.00 | 25.39 | 40.97 | 44.50 | 55.87 | 71.43 | 88.94 | 87.31 | b | 77.43 | 59.81 | 29.13 | 22.32 | 52.18 | ||||||||||||
2023 | 21.68 | 24.79 | 27.90 | 43.37 | 65.94 | 69.03 | 87.35 | 80.42 | 70.20 | 55.58 | 39.03 | 32.97 | 51.52 | |||||||||||||
2024 | 28.16 | 33.21 | 40.10 | 53.73 | 59.00 | 77.33 | 88.19 | 83.39 | 75.60 | 62.94 | 35.20 | 32.29 | 55.76 | |||||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.78 | 33.13 | 41.29 | 52.96 | 64.27 | 74.42 | 85.41 | 83.06 | 72.41 | 58.21 | 40.42 | 29.56 | 55.37 | |||||||||||||
S.D. | 4.12 | 5.09 | 4.98 | 4.89 | 4.01 | 4.41 | 3.04 | 3.40 | 4.30 | 4.07 | 4.69 | 4.02 | 1.78 | |||||||||||||
SKEW | 0.10 | 0.63 | 0.20 | 0.04 | 0.13 | 0.19 | 0.04 | -0.34 | -0.77 | -0.47 | 0.05 | 0.03 | 0.00 | |||||||||||||
MAX | 36.86 | 48.07 | 55.45 | 66.41 | 74.30 | 83.40 | 91.73 | 90.00 | 80.17 | 65.06 | 50.00 | 38.19 | 59.30 | |||||||||||||
MIN | 18.52 | 23.46 | 27.90 | 41.70 | 55.87 | 66.04 | 77.81 | 73.65 | 62.03 | 44.97 | 29.13 | 22.32 | 51.52 | |||||||||||||
YRS | 60 | 62 | 59 | 56 | 61 | 59 | 61 | 60 | 59 | 53 | 56 | 59 | 45 |