| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.00 | u | 69.00 | c | 49.00 | e | ----- | z |
| 1952 | 47.00 | 53.00 | c | 58.00 | a | 78.00 | h | 84.00 | 88.00 | c | 94.00 | d | 94.00 | e | 94.00 | h | 87.00 | t | ----- | z | ----- | z | ----- | z | ||
| 1953 | 61.00 | e | 65.00 | 69.00 | a | 81.00 | c | 75.00 | a | 85.00 | e | 100.00 | b | 98.00 | a | 93.00 | 82.00 | 65.00 | d | 51.00 | a | 100.00 | w | |||
| 1954 | 51.00 | f | 66.00 | a | 62.00 | f | 80.00 | c | 97.00 | a | 101.00 | b | 99.00 | 93.00 | e | 94.00 | a | 78.00 | d | 69.00 | 51.00 | i | ----- | z | ||
| 1955 | 40.00 | l | ----- | z | 60.00 | g | 69.00 | l | ----- | 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 | ----- | z | ----- | z | ----- | z |
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.00 | p | 85.00 | 69.00 | d | 50.00 | o | ----- | z | |
| 1960 | 47.00 | c | 51.00 | l | 74.00 | 77.00 | g | 80.00 | c | 89.00 | 101.00 | i | 97.00 | h | 92.00 | k | 81.00 | g | 65.00 | p | 54.00 | m | ----- | z | ||
| 1961 | 57.00 | q | 60.00 | k | 66.00 | m | 75.00 | 84.00 | a | 97.00 | h | 97.00 | a | 102.00 | 87.00 | 83.00 | a | 60.00 | a | 50.00 | q | ----- | z | |||
| 1962 | 59.00 | g | 56.00 | f | 63.00 | 78.00 | 75.00 | 88.00 | 96.00 | f | 98.00 | c | 92.00 | a | 85.00 | a | 69.00 | b | 62.00 | j | ----- | z | ||||
| 1963 | 53.00 | 64.00 | 62.00 | 69.00 | 82.00 | a | 85.00 | 90.00 | d | 96.00 | b | 94.00 | 86.00 | 63.00 | a | 54.00 | b | 96.00 | j | |||||||
| 1964 | 57.00 | 56.00 | 70.00 | 75.00 | 80.00 | 89.00 | 96.00 | 93.00 | 85.00 | 87.00 | 63.00 | a | 53.00 | 96.00 | a | |||||||||||
| 1965 | 55.00 | 60.00 | a | 65.00 | 75.00 | 82.00 | 86.00 | a | 94.00 | g | 94.00 | 83.00 | 80.00 | 74.00 | a | 54.00 | a | 94.00 | k | |||||||
| 1966 | 49.00 | 49.00 | c | 74.00 | 77.00 | b | 88.00 | b | 90.00 | b | 99.00 | b | 99.00 | c | 92.00 | b | 81.00 | d | 68.00 | d | 49.00 | 99.00 | x | |||
| 1967 | 55.00 | 61.00 | 61.00 | 54.00 | b | 90.00 | a | 95.00 | c | 98.00 | b | 98.00 | 93.00 | b | 78.00 | b | 66.00 | a | 56.00 | 98.00 | m | |||||
| 1968 | 57.00 | 62.00 | 70.00 | c | 78.00 | a | 81.00 | b | 95.00 | c | 99.00 | b | 94.00 | a | 89.00 | b | 78.00 | a | 58.00 | a | 51.00 | b | 99.00 | r | ||
| 1969 | 57.00 | a | 48.00 | a | 67.00 | b | 78.00 | a | 85.00 | e | 90.00 | 96.00 | d | 96.00 | a | 94.00 | b | 75.00 | a | 64.00 | 55.00 | b | 96.00 | t | ||
| 1970 | 55.00 | f | 59.00 | 64.00 | b | 70.00 | b | 85.00 | a | 95.00 | h | 96.00 | d | 95.00 | b | 85.00 | a | 84.00 | a | 57.00 | m | 55.00 | d | ----- | z | |
| 1971 | 62.00 | b | 63.00 | a | 67.00 | ----- | z | 75.00 | c | 87.00 | a | 98.00 | q | 98.00 | c | 90.00 | a | 82.00 | b | 61.00 | e | 48.00 | b | ----- | z | |
| 1972 | 50.00 | h | 59.00 | b | 74.00 | d | 72.00 | g | 88.00 | e | 95.00 | h | 97.00 | d | 100.00 | e | 87.00 | c | 76.00 | b | 58.00 | b | 61.00 | f | ----- | z |
| 1973 | 54.00 | d | 54.00 | f | 54.00 | f | 74.00 | a | 87.00 | b | 100.00 | f | 96.00 | e | 94.00 | c | 90.00 | g | 79.00 | c | 62.00 | c | 55.00 | f | ----- | z |
| 1974 | 57.00 | a | 56.00 | b | 63.00 | e | 75.00 | f | 86.00 | g | 92.00 | u | 96.00 | d | 95.00 | p | ----- | z | ----- | z | ----- | z | 54.00 | m | ----- | z |
| 1975 | 57.00 | b | 51.00 | e | 60.00 | a | 60.00 | b | 85.00 | c | 88.00 | e | 98.00 | a | 94.00 | e | 89.00 | b | 81.00 | m | 73.00 | e | 64.00 | f | ----- | z |
| 1976 | 56.00 | c | 61.00 | b | 63.00 | 74.00 | d | 89.00 | b | 94.00 | a | 94.00 | d | 97.00 | a | 93.00 | b | 82.00 | b | 73.00 | e | 58.00 | c | ----- | z | |
| 1977 | 47.00 | 63.00 | e | 68.00 | b | 80.00 | f | 87.00 | d | 94.00 | c | 96.00 | e | 101.00 | d | 92.00 | a | 80.00 | e | 64.00 | c | 63.00 | i | ----- | z | |
| 1978 | 49.00 | a | 58.00 | 71.00 | c | 74.00 | a | 78.00 | d | 90.00 | a | 99.00 | e | 98.00 | d | 87.00 | d | 82.00 | d | 68.00 | c | 50.00 | a | ----- | z | |
| 1979 | 50.00 | b | 52.00 | b | 67.00 | b | 74.00 | b | 85.00 | b | 92.00 | a | 102.00 | f | 101.00 | d | ----- | z | 84.00 | l | ----- | z | 61.00 | s | ----- | z |
| 1980 | 52.00 | h | 61.00 | i | 57.00 | q | 76.00 | m | 86.00 | h | 86.00 | j | 102.00 | p | 97.00 | o | 92.00 | k | 89.00 | i | 73.00 | t | 61.00 | n | ----- | z |
| 1981 | 58.00 | i | 60.00 | k | 58.00 | l | 83.00 | o | 83.00 | g | 95.00 | l | 95.00 | j | 99.00 | c | 92.00 | f | 72.00 | h | 67.00 | i | 60.00 | d | ----- | z |
| 1982 | 55.00 | a | 54.00 | f | 61.00 | a | 72.00 | c | 88.00 | c | 90.00 | a | ----- | z | 98.00 | m | ----- | z | ----- | z | ----- | z | 54.00 | i | ----- | z |
| 1983 | 53.00 | d | 57.00 | a | 60.00 | b | 64.00 | b | 91.00 | a | 82.00 | g | 99.00 | 101.00 | d | 89.00 | 78.00 | 63.00 | c | ----- | z | ----- | z | |||
| 1984 | 50.00 | j | 50.00 | c | 64.00 | c | 76.00 | d | 92.00 | b | 93.00 | b | 99.00 | i | 96.00 | k | 90.00 | c | 79.00 | 56.00 | d | 46.00 | f | ----- | z | |
| 1985 | 51.00 | a | 57.00 | d | 61.00 | d | 82.00 | b | 81.00 | o | 98.00 | e | 98.00 | g | 96.00 | b | 81.00 | f | 80.00 | k | 69.00 | l | 49.00 | h | ----- | z |
| 1986 | 60.00 | b | 71.00 | a | 69.00 | i | 80.00 | e | 94.00 | f | 94.00 | 93.00 | 97.00 | 82.00 | e | ----- | z | 65.00 | k | 52.00 | h | ----- | z | |||
| 1987 | 58.00 | c | 58.00 | 70.00 | c | 80.00 | m | 95.00 | g | 95.00 | d | 96.00 | h | 98.00 | h | 95.00 | i | 87.00 | i | 60.00 | g | ----- | z | ----- | z | |
| 1988 | 49.00 | g | 65.00 | d | 72.00 | i | 81.00 | i | 84.00 | o | 100.00 | o | 101.00 | h | 97.00 | e | 95.00 | f | 86.00 | 69.00 | e | 55.00 | e | ----- | z | |
| 1989 | 53.00 | c | 57.00 | d | 63.00 | v | 80.00 | i | 75.00 | u | 90.00 | u | 99.00 | r | 91.00 | n | 87.00 | f | 80.00 | a | 70.00 | e | 60.00 | a | ----- | z |
| 1990 | 60.00 | c | 60.00 | 70.00 | a | 76.00 | e | 73.00 | h | 95.00 | c | 99.00 | g | 103.00 | f | 95.00 | d | 81.00 | i | 75.00 | b | 63.00 | d | ----- | z | |
| 1991 | 55.00 | 64.00 | g | 65.00 | c | 64.00 | g | 76.00 | j | 90.00 | l | 97.00 | l | 97.00 | f | 92.00 | f | 86.00 | 66.00 | k | 58.00 | k | ----- | z | ||
| 1992 | 57.00 | g | 68.00 | k | 67.00 | f | 80.00 | f | 92.00 | f | 98.00 | a | 97.00 | c | 101.00 | 88.00 | e | 74.00 | l | 60.00 | f | 50.00 | c | ----- | z | |
| 1993 | 44.00 | d | 43.00 | e | 67.00 | d | 70.00 | i | 86.00 | c | 91.00 | s | 90.00 | g | 94.00 | d | 93.00 | f | 85.00 | f | 64.00 | i | 56.00 | h | ----- | z |
| 1994 | 59.00 | e | 54.00 | e | 74.00 | g | 80.00 | n | 85.00 | f | 92.00 | l | 100.00 | h | 97.00 | e | 90.00 | g | 77.00 | q | 52.00 | m | 49.00 | g | ----- | z |
| 1995 | 51.00 | h | 69.00 | b | 65.00 | l | 59.00 | y | 80.00 | l | 84.00 | m | 94.00 | p | 93.00 | n | 92.00 | p | 81.00 | p | 70.00 | x | 63.00 | w | ----- | z |
| 1996 | 53.00 | t | 67.00 | p | 71.00 | r | 78.00 | m | 86.00 | n | 91.00 | n | 98.00 | p | 100.00 | p | 95.00 | n | 89.00 | n | 71.00 | q | 57.00 | q | ----- | z |
| 1997 | 55.00 | n | 58.00 | n | 73.00 | m | 78.00 | m | 88.00 | l | 88.00 | p | 96.00 | k | 99.00 | b | 90.00 | 85.00 | c | ----- | z | ----- | z | ----- | z | |
| 1998 | ----- | z | 50.00 | d | ----- | z | 79.00 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.00 | j | 58.00 | i | ----- | z |
| 1999 | 55.00 | a | 58.00 | f | 64.00 | j | 69.00 | h | 89.00 | p | 92.00 | t | 94.00 | u | ----- | z | 94.00 | t | 84.00 | r | 73.00 | r | ----- | z | ----- | z |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.00 | 69.00 | a | 50.00 | ----- | z | ||
| 2002 | ----- | z | 62.00 | f | 74.00 | f | 75.00 | 89.00 | e | 95.00 | 104.00 | b | 98.00 | a | 92.00 | 78.00 | 62.00 | 56.00 | ----- | z | ||||||
| 2003 | 63.00 | 53.00 | a | 74.00 | 71.00 | 93.00 | d | 92.00 | 102.00 | f | 98.00 | c | 92.00 | c | 83.00 | d | 63.00 | 54.00 | 102.00 | u | ||||||
| 2004 | 53.00 | 52.00 | 78.00 | 82.00 | 85.00 | 93.00 | h | 96.00 | e | 97.00 | c | 92.00 | c | 79.00 | f | 59.00 | 57.00 | c | ----- | z | ||||||
| 2005 | 46.00 | c | 54.00 | 74.00 | d | 71.00 | j | 82.00 | f | 86.00 | f | 102.00 | 98.00 | j | 89.00 | c | 84.00 | 65.00 | 50.00 | d | ----- | z | ||||
| 2006 | 51.00 | s | 48.00 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 93.00 | c | 81.00 | 74.00 | o | ----- | z | ----- | z | |
| 2007 | ----- | z | ----- | z | 71.00 | y | 81.00 | 87.00 | 91.00 | 103.00 | b | 98.00 | l | 93.00 | 79.00 | b | 68.00 | 56.00 | ----- | z | ||||||
| 2008 | 47.00 | a | 57.00 | 64.00 | 77.00 | i | 95.00 | h | 95.00 | g | 97.00 | 96.00 | 87.00 | 82.00 | a | 71.00 | 61.00 | a | ----- | z | ||||||
| 2009 | 56.00 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2011 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2024 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 54.00 | 57.51 | 66.81 | 74.26 | 85.10 | 91.68 | 97.35 | 97.15 | 90.03 | 81.63 | 65.81 | 54.20 | 96.00 | |||||||||||||
| S.D. | 5.00 | 6.24 | 5.13 | 6.55 | 5.33 | 4.08 | 3.02 | 2.52 | 3.41 | 3.35 | 4.97 | 4.13 | 0.0 | |||||||||||||
| SKEW | -0.22 | -0.01 | 0.29 | -1.46 | -0.19 | 0.25 | 0.07 | 0.08 | -0.65 | 0.03 | -0.06 | 0.36 | 0.00 | |||||||||||||
| MAX | 63.00 | 71.00 | 78.00 | 82.00 | 97.00 | 101.00 | 104.00 | 102.00 | 95.00 | 88.00 | 75.00 | 63.00 | 96.00 | |||||||||||||
| MIN | 44.00 | 43.00 | 58.00 | 54.00 | 75.00 | 85.00 | 90.00 | 93.00 | 82.00 | 75.00 | 56.00 | 48.00 | 96.00 | |||||||||||||
| YRS | 33 | 35 | 32 | 27 | 30 | 28 | 26 | 34 | 31 | 32 | 32 | 25 | 1 | |||||||||||||