YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.52 | h | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 61.13 | c | 48.96 | g | 37.98 | c | 27.40 | a | 42.17 | i |
1988 | 20.77 | 31.00 | a | 37.08 | a | 45.60 | a | 58.37 | a | 71.47 | 72.68 | a | 72.71 | g | 60.63 | 51.07 | d | 37.77 | 30.56 | 47.00 | a | |||||
1989 | 31.37 | 19.71 | 45.08 | l | 48.90 | y | 56.85 | 62.00 | b | 72.45 | 69.21 | 59.62 | b | 50.60 | 39.53 | a | 24.47 | a | 48.58 | b | ||||||
1990 | 29.37 | d | 26.75 | d | 38.75 | a | 49.42 | 54.81 | m | 72.10 | t | 71.69 | m | 71.17 | a | 67.50 | a | 51.87 | a | 41.55 | 24.95 | i | 47.05 | d | ||
1991 | 25.05 | a | 38.98 | 39.41 | b | 47.63 | 59.87 | a | 70.57 | a | 72.22 | b | 70.38 | c | 63.37 | 50.21 | 33.10 | 31.88 | b | 50.22 | ||||||
1992 | 28.18 | a | 37.93 | a | 42.77 | a | 50.33 | o | 58.96 | h | 64.35 | c | 69.36 | b | 68.30 | a | 62.33 | c | 51.33 | e | 31.45 | b | 21.98 | a | 47.80 | b |
1993 | 21.37 | 24.00 | 38.95 | a | 46.16 | a | 56.36 | b | 64.85 | c | 71.32 | 68.16 | i | 58.23 | b | 45.50 | r | 32.29 | b | 32.80 | f | 45.95 | c | |||
1994 | 29.73 | i | 18.71 | u | ----- | z | ----- | z | ----- | z | ----- | z | 73.93 | h | ----- | z | 66.98 | f | 52.60 | b | 37.38 | 34.17 | d | 41.38 | i | |
1995 | 31.87 | d | 39.66 | f | 39.43 | b | 43.32 | 50.50 | 66.35 | f | 72.68 | 75.58 | g | 63.40 | 48.64 | c | 42.07 | b | 33.36 | j | 48.99 | d | ||||
1996 | 25.28 | d | 33.25 | a | 34.50 | e | 48.95 | 57.15 | 69.08 | 72.55 | a | 70.39 | l | 62.09 | a | 52.07 | a | 35.28 | a | 32.33 | d | 47.50 | a | |||
1997 | 28.88 | a | 31.06 | b | 43.98 | f | 43.21 | a | 57.60 | 69.12 | 73.55 | a | 71.78 | a | 66.54 | b | 51.29 | b | 35.78 | 28.45 | 50.66 | a | ||||
1998 | 31.86 | b | 35.30 | 35.85 | a | 45.87 | 61.61 | 66.48 | h | 75.39 | c | 72.58 | 69.08 | 51.70 | c | 39.40 | e | 29.87 | 49.87 | a | ||||||
1999 | 32.36 | c | 38.17 | a | 41.13 | 45.05 | a | 57.31 | b | 68.03 | k | 77.36 | b | 73.15 | e | 60.08 | 52.84 | c | 45.85 | 33.13 | h | 52.33 | b | |||
2000 | 31.11 | 38.23 | e | 41.39 | 48.30 | 60.00 | 65.69 | i | 76.30 | a | 76.73 | 64.54 | f | 51.69 | b | 30.75 | 25.39 | d | 47.99 | b | ||||||
2001 | 29.86 | c | 28.20 | 38.81 | 50.07 | a | 58.14 | c | 70.98 | 77.79 | e | 74.68 | 66.37 | d | 51.52 | e | 41.14 | b | 32.73 | c | 51.69 | |||||
2002 | 30.19 | 30.21 | d | 32.57 | a | 50.72 | 57.15 | g | 73.46 | c | 77.83 | a | 73.38 | c | 65.02 | c | 45.81 | 40.74 | i | 33.79 | 51.30 | b | ||||
2003 | 32.68 | c | 27.91 | 41.38 | c | 51.93 | a | 58.02 | 66.22 | 79.11 | d | 75.45 | 62.65 | g | 54.96 | e | 36.57 | a | 32.86 | b | 50.64 | a | ||||
2004 | 29.88 | c | 30.24 | b | 46.30 | d | 48.14 | b | 60.29 | e | 65.80 | 73.78 | h | 69.16 | b | 66.12 | 52.19 | b | 37.70 | 33.38 | b | 49.02 | a | |||
2005 | 30.89 | d | 35.41 | 39.87 | 48.17 | 58.34 | 70.04 | b | 76.97 | a | 73.16 | b | 67.08 | 52.21 | 42.34 | e | 30.04 | e | 52.04 | |||||||
2006 | 37.41 | d | 30.16 | c | 37.19 | e | 51.76 | a | 61.68 | 71.46 | d | 77.06 | g | 71.69 | d | 57.91 | b | 49.37 | 37.33 | f | 30.57 | i | 52.07 | c | ||
2007 | 18.04 | c | 22.40 | b | 44.48 | d | 45.43 | 59.70 | c | 68.23 | b | 75.89 | c | 75.58 | e | 65.76 | a | 54.02 | 39.48 | 23.11 | c | 49.34 | ||||
2008 | 23.63 | a | 30.65 | c | 39.21 | c | 45.75 | h | 56.35 | d | 69.91 | m | 76.07 | d | 71.60 | e | 62.07 | a | 49.93 | b | 39.81 | c | 25.14 | b | 47.45 | b |
2009 | 31.26 | 36.06 | b | 39.03 | 44.93 | a | 58.20 | d | 66.87 | 72.20 | a | 69.55 | 60.85 | c | 41.73 | 42.02 | a | 22.67 | h | 51.15 | a | |||||
2010 | 29.05 | 26.44 | d | 40.14 | c | 49.86 | b | 55.46 | d | 71.53 | m | 75.09 | i | 74.84 | f | 66.09 | b | 54.13 | d | 38.40 | 31.90 | g | 44.95 | d | ||
2011 | 26.16 | c | 26.04 | 41.09 | b | 47.98 | c | 55.65 | e | 70.33 | j | 78.07 | c | 76.15 | a | 62.44 | l | 52.79 | c | 38.48 | 29.02 | c | 47.14 | b | ||
2012 | 32.87 | 28.60 | c | 47.95 | a | 53.31 | a | 60.40 | 77.31 | l | 79.17 | h | 73.06 | m | 65.34 | a | 48.14 | f | 43.07 | b | 29.40 | 45.12 | d | |||
2013 | 27.70 | a | 29.85 | b | 35.00 | 41.48 | d | 60.04 | e | 70.42 | e | 74.69 | b | 73.89 | 68.20 | b | 49.93 | b | 37.94 | c | 27.13 | a | 49.69 | |||
2014 | 30.13 | 23.56 | b | 39.18 | 48.77 | 56.57 | b | 67.32 | 73.92 | e | 72.88 | b | 63.90 | e | 54.29 | e | 35.47 | 30.04 | d | 49.67 | ||||||
2015 | 30.02 | a | 33.34 | 43.88 | a | 50.71 | b | 54.65 | 71.53 | 73.75 | c | 73.76 | 69.57 | a | 54.64 | f | 42.54 | e | 30.52 | 52.21 | a | |||||
2016 | 31.03 | 35.52 | 45.52 | d | 48.50 | 55.29 | b | 72.91 | b | 75.24 | 70.56 | d | 65.67 | f | 56.98 | b | 45.61 | c | 25.45 | 51.15 | a | |||||
2017 | 26.65 | 38.39 | a | 45.76 | 50.62 | f | 56.19 | b | 69.85 | 76.15 | 69.93 | b | 63.83 | d | 50.65 | 41.22 | c | 30.48 | 51.74 | a | ||||||
2018 | 29.21 | 26.48 | 41.40 | b | 43.25 | 62.40 | 71.98 | b | 74.89 | 70.42 | a | 65.40 | d | 46.28 | b | 35.77 | b | 31.82 | 49.94 | |||||||
2019 | 29.84 | 23.77 | 33.69 | 49.57 | 52.24 | 67.47 | 76.18 | 71.85 | 68.75 | 44.68 | 36.03 | 33.74 | 48.98 | |||||||||||||
2020 | 32.37 | 29.88 | 41.89 | 46.60 | 56.71 | e | 73.69 | a | 75.63 | 75.83 | a | 63.27 | 47.34 | 43.60 | a | 31.84 | 51.55 | |||||||||
2021 | 30.03 | 22.84 | 40.27 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.44 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.98 | 30.32 | 40.12 | 47.67 | 57.65 | 69.12 | 74.82 | 72.41 | 64.12 | 50.82 | 38.67 | 29.52 | 50.35 | |||||||||||||
S.D. | 3.91 | 5.35 | 3.77 | 2.94 | 2.69 | 3.09 | 2.38 | 2.38 | 3.23 | 3.19 | 3.85 | 3.45 | 1.12 | |||||||||||||
SKEW | -0.91 | 0.00 | 0.05 | -0.21 | -0.51 | -0.50 | -0.25 | 0.15 | -0.18 | -0.88 | -0.17 | -0.59 | 0.45 | |||||||||||||
MAX | 37.41 | 38.98 | 47.95 | 53.31 | 62.40 | 73.69 | 79.11 | 76.73 | 69.57 | 56.98 | 45.85 | 34.17 | 52.04 | |||||||||||||
MIN | 18.04 | 19.71 | 32.57 | 41.48 | 50.50 | 62.00 | 69.36 | 68.30 | 57.91 | 41.73 | 30.75 | 21.98 | 48.98 | |||||||||||||
YRS | 33 | 32 | 30 | 28 | 29 | 23 | 27 | 26 | 29 | 30 | 32 | 27 | 9 |