YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.00 | l | 44.00 | c | 42.13 | 31.27 | 24.19 | e | 35.40 | h | ||
1989 | 25.09 | i | ----- | z | 28.54 | c | 37.22 | c | 38.35 | e | 46.78 | g | 50.67 | p | 46.87 | h | 43.53 | m | 31.83 | m | 28.43 | p | 23.76 | n | 34.70 | i |
1990 | ----- | z | ----- | z | 29.09 | t | 36.44 | c | 38.48 | b | 44.44 | c | 51.93 | c | 50.97 | a | 47.97 | a | 34.06 | 30.10 | j | 16.42 | l | 43.47 | e | |
1991 | 21.40 | f | 30.89 | a | 26.79 | b | 32.79 | b | 38.67 | a | 40.64 | b | 48.67 | a | 51.14 | b | 43.22 | c | 31.68 | i | 29.93 | c | 27.74 | h | 38.08 | c |
1992 | 27.43 | c | 30.50 | a | 33.03 | a | 36.00 | a | 40.88 | e | 47.38 | d | 49.08 | e | 51.91 | i | 38.32 | h | 36.35 | n | 26.62 | i | 17.45 | i | 37.76 | e |
1993 | 15.80 | p | 18.13 | m | 26.84 | l | 32.41 | m | 45.07 | p | 42.50 | j | 45.00 | n | 45.79 | q | 41.75 | n | 34.67 | p | 20.94 | n | 22.44 | v | ----- | z |
1994 | 27.07 | p | 21.14 | 29.32 | 35.67 | f | 40.56 | d | 41.22 | c | 51.97 | 48.45 | 43.32 | h | 34.76 | f | 23.89 | c | 22.90 | 34.93 | d | |||||
1995 | 23.96 | d | 26.65 | b | ----- | z | 32.52 | c | 39.78 | d | 43.20 | j | 48.86 | q | 40.83 | h | 40.71 | b | 31.65 | e | 32.07 | b | 23.92 | e | 31.41 | d |
1996 | 17.85 | e | 20.26 | b | 25.56 | f | 35.15 | c | 36.57 | c | 43.70 | c | 48.65 | 46.96 | c | 39.07 | b | 32.74 | d | 25.46 | d | 18.59 | d | 33.18 | a | |
1997 | 21.50 | i | 23.19 | b | 28.41 | b | 32.04 | b | 37.17 | b | 44.03 | a | 52.00 | a | 52.10 | 42.48 | a | 31.77 | 29.68 | h | 24.86 | c | 36.81 | b | ||
1998 | 24.13 | a | 29.38 | b | 32.30 | d | 33.19 | c | 39.14 | c | 45.35 | d | 57.72 | b | 53.27 | a | 48.50 | b | 34.74 | d | 33.12 | d | 19.35 | e | 37.52 | |
1999 | 27.73 | a | 26.48 | c | 28.81 | j | 32.44 | c | 35.11 | d | 42.89 | b | 47.48 | b | 51.90 | b | 37.89 | b | 34.16 | f | 35.52 | a | 28.57 | c | 36.60 | b |
2000 | 28.00 | e | 28.54 | a | 33.07 | b | 36.50 | b | 39.17 | a | 48.75 | b | 49.23 | a | 50.10 | a | ----- | z | ----- | z | ----- | z | ----- | z | 39.17 | d |
2001 | ----- | z | 22.67 | p | 30.33 | g | 31.48 | e | 34.26 | h | 42.41 | c | 50.65 | 51.97 | a | 47.25 | b | 34.80 | f | 34.59 | a | 26.69 | e | 40.72 | e | |
2002 | 22.08 | r | 24.58 | d | 21.85 | k | 31.17 | r | 37.29 | n | 45.36 | s | 56.07 | p | 47.63 | a | 44.08 | e | 30.15 | d | 29.32 | b | 29.41 | b | 34.20 | f |
2003 | 30.00 | a | 26.43 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.00 | k |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | 26.25 | w | ----- | z | ----- | z | ----- | z | ----- | z | 48.90 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.60 | o | 20.23 | i | ----- | z |
2007 | 19.21 | g | 27.13 | m | 25.41 | i | 30.95 | k | 39.40 | k | 39.41 | m | 54.07 | p | 46.56 | m | 41.40 | o | 30.79 | q | 25.44 | n | 22.00 | t | ----- | z |
2008 | 15.78 | m | ----- | z | 26.85 | r | 27.70 | t | 39.42 | l | 40.19 | n | 51.44 | o | 49.67 | p | 44.18 | m | 33.27 | p | 30.18 | s | 16.91 | t | ----- | z |
2009 | 18.00 | r | 25.00 | n | 21.46 | r | ----- | z | 39.15 | r | 46.16 | k | 50.67 | p | 51.73 | p | 45.83 | r | 30.05 | j | 29.44 | n | 16.11 | m | ----- | z |
2010 | 27.81 | o | 28.46 | o | 25.43 | x | ----- | z | ----- | z | ----- | z | 47.08 | r | 49.20 | u | 43.81 | i | ----- | z | 24.83 | x | 28.00 | l | ----- | z |
2011 | 20.21 | l | 20.44 | j | 29.16 | l | 30.41 | m | 35.89 | l | 42.64 | s | 49.67 | m | 49.94 | o | 48.22 | l | 36.08 | r | 27.95 | k | 23.92 | r | ----- | z |
2012 | 23.63 | l | 25.33 | k | 27.92 | g | 31.23 | q | 35.55 | b | 45.27 | o | 50.45 | 49.80 | f | ----- | z | 35.12 | n | 32.41 | a | 24.86 | j | 39.47 | i | |
2013 | 19.89 | d | 26.18 | 27.84 | 32.53 | 40.87 | 47.13 | 54.13 | 53.81 | 49.73 | 33.10 | 28.40 | 20.74 | 36.20 | ||||||||||||
2014 | 24.97 | 19.04 | 28.26 | 32.97 | 41.35 | 44.83 | 54.35 | 53.77 | 46.87 | 40.39 | 26.83 | 26.71 | 36.70 | |||||||||||||
2015 | 26.42 | 29.82 | 32.06 | 32.23 | 43.32 | 50.87 | 54.52 | 54.13 | 43.13 | 42.55 | 27.47 | 25.74 | 38.52 | |||||||||||||
2016 | 25.71 | 30.14 | 31.23 | 38.23 | 42.55 | 46.13 | 49.90 | 50.71 | 43.70 | 39.71 | 34.83 | 17.35 | 37.52 | |||||||||||||
2017 | 16.41 | d | 23.50 | 30.45 | 33.20 | 39.48 | 46.10 | 52.90 | 53.32 | 47.67 | 34.00 | 30.28 | a | 20.58 | 35.66 | |||||||||||
2018 | 28.77 | 20.89 | 26.68 | 33.70 | 42.21 | q | 43.40 | 51.26 | 51.97 | 42.70 | 35.16 | 29.93 | 25.74 | 35.47 | a | |||||||||||
2019 | 25.03 | 15.25 | 23.13 | 34.87 | 42.29 | 44.93 | 48.94 | 52.39 | 44.63 | 29.71 | 28.87 | 27.97 | 34.83 | |||||||||||||
2020 | 27.65 | 25.31 | 27.39 | 32.30 | 40.29 | 45.23 | 49.39 | 52.06 | 47.60 | 36.35 | 30.07 | 26.68 | 36.69 | |||||||||||||
2021 | 26.87 | 21.27 | b | 27.90 | 32.93 | 39.52 | 50.30 | 56.97 | 54.42 | 46.17 | 36.52 | 32.36 | h | 22.42 | 37.75 | a | ||||||||||
2022 | 23.39 | 23.21 | ----- | z | ----- | z | ----- | z | ----- | z | 52.92 | g | 54.55 | 47.87 | 39.04 | g | 22.17 | 18.26 | 31.57 | f | ||||||
2023 | ----- | z | 18.77 | o | 25.42 | 28.88 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.42 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 24.95 | 24.81 | 28.93 | 33.94 | 39.46 | 45.25 | 51.51 | 51.78 | 44.76 | 35.30 | 29.81 | 23.72 | 36.70 | |||||||||||||
S.D. | 3.79 | 4.35 | 2.78 | 1.98 | 2.21 | 2.77 | 2.85 | 2.18 | 3.25 | 4.05 | 3.62 | 3.71 | 1.16 | |||||||||||||
SKEW | -0.99 | -0.31 | -0.12 | 0.80 | -0.28 | 0.41 | 0.71 | -0.79 | -0.46 | 0.51 | -0.35 | -0.26 | -0.07 | |||||||||||||
MAX | 30.00 | 30.89 | 33.07 | 38.23 | 43.32 | 50.87 | 57.72 | 54.55 | 49.73 | 42.55 | 35.52 | 29.41 | 38.52 | |||||||||||||
MIN | 16.41 | 15.25 | 23.13 | 31.48 | 35.11 | 40.64 | 47.48 | 46.96 | 37.89 | 29.71 | 22.17 | 17.35 | 34.83 | |||||||||||||
YRS | 17 | 20 | 17 | 20 | 20 | 19 | 20 | 20 | 20 | 16 | 19 | 19 | 8 |