YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.10 | a | 37.97 | 34.68 | 21.70 | 17.10 | 30.91 | g | ||||
1951 | 15.55 | 17.93 | 24.06 | 28.50 | 35.00 | 39.13 | 54.03 | 50.30 | a | 39.23 | 34.61 | 20.67 | 15.87 | 31.24 | ||||||||||||
1952 | 20.65 | 16.09 | f | 17.62 | e | 29.83 | 35.58 | 46.73 | 51.53 | a | 50.30 | a | 43.93 | 31.48 | b | 16.86 | a | 15.06 | 32.69 | a | ||||||
1953 | 19.46 | g | 15.85 | a | 24.30 | a | 28.73 | 32.75 | c | 41.44 | c | 55.29 | 49.45 | 40.20 | 34.06 | 25.60 | 14.23 | 32.90 | a | |||||||
1954 | 18.90 | 21.14 | 23.41 | b | 30.63 | 38.19 | 45.50 | 53.84 | 50.35 | 44.90 | 32.35 | 21.73 | 15.84 | 33.07 | ||||||||||||
1955 | 13.39 | c | 11.00 | a | 21.07 | b | 22.48 | a | 33.75 | c | 39.77 | 48.33 | a | 50.97 | a | 39.63 | c | 34.54 | c | 23.28 | e | 23.59 | b | 30.15 | ||
1956 | 21.36 | c | 12.38 | 19.79 | b | 26.21 | a | 35.42 | 47.75 | b | 51.34 | b | 47.77 | a | 44.38 | d | 32.07 | d | 11.23 | h | 11.74 | d | 31.84 | a | ||
1957 | 23.60 | a | 25.12 | c | 24.52 | j | 27.74 | c | 31.53 | a | 44.47 | 51.87 | a | 50.50 | a | 42.96 | c | 35.14 | b | 20.19 | c | 17.73 | a | 33.71 | a | |
1958 | 12.34 | b | 23.04 | a | 21.39 | 27.72 | a | 37.03 | 45.80 | 50.55 | 51.94 | 45.27 | 34.48 | 19.70 | 17.89 | c | 32.26 | |||||||||
1959 | 16.65 | 20.26 | a | 21.19 | 31.60 | 33.87 | 46.03 | 53.90 | 52.65 | 41.67 | 30.45 | 20.43 | 17.90 | 32.22 | ||||||||||||
1960 | 8.29 | 15.59 | 24.87 | 27.73 | 31.61 | 44.83 | 53.84 | 50.03 | 42.30 | 31.19 | 20.70 | 11.39 | 30.20 | |||||||||||||
1961 | 12.90 | 18.14 | 22.32 | 23.64 | e | 31.37 | a | 45.23 | 51.55 | 50.42 | 42.31 | a | 29.32 | c | 23.96 | b | 13.48 | 30.39 | ||||||||
1962 | 13.10 | 19.04 | 16.94 | 27.20 | 31.74 | 39.80 | 51.55 | 45.77 | 44.70 | 31.52 | 26.00 | 16.58 | 30.33 | |||||||||||||
1963 | 10.50 | a | 22.39 | 17.35 | 22.77 | 35.06 | 37.47 | 50.67 | a | 52.06 | 46.93 | 36.94 | 26.30 | 13.00 | 30.95 | |||||||||||
1964 | 10.42 | 12.24 | 17.84 | 26.10 | 33.87 | 38.57 | 48.10 | 49.48 | 41.90 | 30.26 | 17.17 | 20.00 | 28.83 | |||||||||||||
1965 | 17.74 | 14.93 | 17.97 | 25.67 | 31.29 | 38.11 | b | 50.39 | 46.19 | 38.63 | 24.03 | a | 20.53 | 18.58 | 28.67 | |||||||||||
1966 | 7.52 | 13.96 | 19.40 | a | 26.07 | 34.58 | 41.40 | 52.29 | 50.55 | 43.57 | 29.58 | 24.23 | 13.61 | 29.73 | ||||||||||||
1967 | 6.61 | 16.93 | 26.42 | 25.83 | 30.61 | 40.00 | 53.13 | 50.65 | 45.43 | 29.68 | 24.60 | 10.90 | 30.07 | |||||||||||||
1968 | 11.77 | 23.00 | 24.10 | 28.85 | d | 32.65 | 39.73 | 45.39 | 47.94 | 40.87 | 31.97 | 23.33 | 12.35 | 30.16 | ||||||||||||
1969 | 23.90 | 18.96 | 16.81 | 26.87 | 33.45 | 41.38 | a | 53.52 | 55.94 | 46.17 | 31.61 | 22.97 | 21.06 | 32.72 | ||||||||||||
1970 | 13.16 | 23.61 | 22.48 | 22.03 | 35.35 | 42.10 | 53.35 | 53.68 | 42.13 | 30.13 | 23.73 | 19.32 | 31.76 | |||||||||||||
1971 | 14.71 | 18.00 | 22.48 | 26.20 | 32.90 | 41.67 | 52.03 | 52.26 | 43.33 | 31.90 | 22.97 | 18.13 | 31.38 | |||||||||||||
1972 | 16.74 | 18.10 | 24.10 | 27.55 | a | 31.42 | 44.70 | 52.52 | 50.32 | 44.53 | 38.13 | 21.60 | 15.87 | 32.13 | ||||||||||||
1973 | 15.19 | 21.29 | 23.58 | 26.23 | 36.45 | 42.70 | 51.61 | 51.39 | 38.34 | a | 31.26 | 25.07 | 19.13 | 31.85 | ||||||||||||
1974 | 17.13 | 17.36 | 26.35 | 25.57 | 36.94 | 48.66 | a | 51.62 | b | 48.60 | a | 43.47 | 37.39 | 23.15 | d | 14.06 | 32.52 | |||||||||
1975 | 14.13 | 17.86 | 22.65 | 26.34 | a | 30.43 | a | 39.43 | 52.90 | 47.71 | 42.97 | 30.63 | a | 19.28 | a | 15.10 | 29.95 | |||||||||
1976 | 15.61 | 24.19 | b | 21.61 | 28.69 | a | 37.00 | 40.93 | 51.74 | 48.03 | 43.33 | 30.35 | 19.55 | a | 13.90 | a | 31.25 | |||||||||
1977 | 14.40 | a | 17.81 | a | 20.45 | 28.30 | 32.71 | 43.77 | 54.23 | 52.65 | 48.47 | 35.58 | 25.17 | 23.00 | c | 33.04 | ||||||||||
1978 | 21.44 | d | 19.28 | c | 28.17 | a | 30.20 | 32.84 | 43.33 | 48.90 | 48.55 | 44.77 | 35.77 | a | 27.52 | a | 13.61 | 32.86 | ||||||||
1979 | 16.06 | 16.70 | a | 22.87 | 27.40 | 36.58 | 43.27 | 48.74 | 47.26 | 44.83 | 33.50 | a | 20.59 | a | 17.68 | c | 31.29 | |||||||||
1980 | 24.60 | a | 23.41 | b | 24.93 | d | 27.80 | 32.58 | 42.63 | 51.26 | 49.69 | b | 42.97 | 31.23 | 20.55 | a | 22.72 | b | 32.86 | |||||||
1981 | 21.59 | b | 19.15 | a | 24.61 | 31.64 | b | 36.65 | 47.83 | 54.52 | 52.45 | 43.23 | 33.55 | 24.11 | l | 20.14 | j | 36.52 | b | |||||||
1982 | 19.14 | j | 22.74 | i | 28.38 | j | 31.39 | g | 35.54 | e | 38.70 | c | 50.59 | d | 53.04 | e | 46.27 | d | 27.58 | e | 26.71 | f | 20.23 | e | 38.85 | e |
1983 | 18.25 | k | 21.79 | i | 28.04 | h | 25.43 | i | 34.04 | e | 40.12 | d | 53.33 | d | 50.74 | d | 49.36 | e | 35.50 | g | 21.30 | g | 23.28 | f | 45.52 | g |
1984 | 16.29 | j | 14.30 | i | 21.09 | i | 24.81 | i | 38.81 | 42.08 | d | 53.96 | f | 51.67 | d | 47.72 | e | 31.46 | e | 22.50 | f | 20.89 | l | 42.35 | g | |
1985 | 17.77 | i | 14.95 | i | 27.71 | j | 31.36 | h | 40.12 | g | 46.50 | f | 54.15 | e | 53.00 | g | 42.17 | g | 36.08 | f | 25.88 | f | 16.77 | a | 35.46 | j |
1986 | 21.48 | 24.50 | 28.35 | 32.10 | 37.26 | d | 45.67 | f | 52.62 | e | 54.80 | f | 42.87 | g | 32.25 | g | 28.83 | g | 21.26 | l | 32.72 | f | ||||
1987 | 15.52 | j | 22.26 | i | 23.27 | i | 30.05 | i | 35.43 | j | 43.74 | g | 48.70 | h | 51.38 | g | 42.64 | e | 37.08 | e | 23.92 | f | 18.11 | c | 32.61 | i |
1988 | 14.37 | l | 22.25 | i | 22.61 | h | 31.48 | g | 35.42 | 48.33 | 55.25 | c | 54.20 | a | 39.96 | c | 37.32 | f | 25.35 | g | 16.26 | d | 41.57 | f | ||
1989 | 15.40 | k | 19.58 | i | 28.40 | f | 33.19 | i | 40.23 | a | 43.10 | a | 55.20 | a | 51.28 | b | 45.39 | b | 33.67 | d | 22.85 | d | 15.58 | g | 41.67 | e |
1990 | 16.10 | k | 20.24 | k | 26.68 | i | 32.84 | e | 39.76 | b | 48.07 | c | 56.03 | 50.61 | 49.04 | b | 32.04 | c | 25.74 | c | 16.42 | e | 38.95 | c | ||
1991 | 17.23 | i | 21.47 | i | 22.71 | j | 28.33 | i | 34.83 | b | 40.80 | e | 53.38 | e | 51.75 | c | 46.46 | f | 35.88 | e | 25.04 | e | 20.16 | f | 40.28 | f |
1992 | 11.50 | k | 22.95 | j | 26.00 | i | 31.43 | g | 41.44 | f | 47.60 | t | 51.42 | 51.68 | 43.03 | a | 34.47 | a | 20.14 | b | 16.73 | a | 36.25 | f | ||
1993 | 22.29 | n | 24.19 | g | 25.77 | e | 28.32 | h | 37.59 | b | 41.42 | d | 50.90 | b | 53.00 | d | 42.33 | f | 33.62 | g | 22.61 | g | 19.75 | g | 41.74 | g |
1994 | 16.70 | k | 18.55 | h | 26.61 | h | 30.20 | j | 36.85 | e | 51.54 | b | 51.44 | f | 55.15 | d | 46.33 | f | 31.84 | f | 23.55 | h | 22.00 | f | 47.84 | i |
1995 | 20.74 | l | 27.05 | i | 27.96 | h | 30.10 | j | 35.40 | f | 41.65 | d | 50.84 | f | 55.04 | d | 47.88 | e | 31.16 | f | 26.62 | i | 20.46 | e | 41.26 | h |
1996 | 21.71 | j | 24.84 | j | 26.10 | j | 30.35 | g | 40.36 | i | 47.57 | i | 54.05 | k | 52.10 | k | 44.21 | k | 30.62 | j | 25.20 | j | 21.45 | i | ----- | z |
1997 | 16.44 | m | 19.22 | j | 22.76 | j | 30.64 | h | 39.75 | k | 41.70 | g | 51.31 | e | 53.05 | i | 49.14 | h | 32.83 | g | 27.05 | i | 15.00 | f | 51.31 | k |
1998 | 19.14 | j | ----- | z | 26.32 | i | 24.59 | h | 34.64 | i | 41.91 | h | 55.44 | f | 53.55 | i | 47.21 | f | 33.10 | j | 24.53 | k | 19.32 | i | ----- | z |
1999 | 20.95 | j | 21.26 | i | 25.96 | h | 28.00 | h | 35.95 | k | 45.09 | h | 54.81 | j | 52.77 | i | 46.38 | i | 31.56 | m | 23.30 | j | 15.38 | g | ----- | z |
2000 | 20.10 | k | 21.95 | i | 24.91 | i | 31.65 | j | 39.45 | i | 52.10 | i | 54.90 | k | 55.39 | h | 47.60 | j | 35.43 | j | 20.60 | j | 18.30 | k | ----- | z |
2001 | 17.81 | j | 23.05 | i | 25.14 | i | 33.33 | i | 40.68 | i | 45.95 | i | 52.70 | k | 51.95 | i | 44.87 | o | 36.14 | i | 24.81 | i | 15.20 | k | ----- | z |
2002 | 18.48 | j | 15.37 | i | 23.10 | j | 30.45 | h | 32.45 | i | 43.21 | p | 56.73 | e | 53.96 | h | 47.55 | j | 33.95 | i | 22.55 | j | 16.68 | i | 56.73 | k |
2003 | 21.48 | j | 23.33 | j | 26.60 | k | 29.27 | h | 40.19 | j | 49.19 | i | 56.68 | i | 55.42 | g | 48.00 | f | 39.52 | f | 27.85 | j | 18.92 | g | ----- | z |
2004 | 18.40 | k | 20.37 | j | 31.43 | h | 33.77 | h | 38.30 | k | 45.05 | i | 53.74 | l | 50.91 | i | 43.45 | j | 35.13 | h | 26.77 | 21.48 | 24.13 | j | ||
2005 | 25.16 | 34.04 | b | 29.30 | d | 29.86 | i | 39.83 | m | 47.25 | j | 55.00 | l | 52.65 | h | 47.33 | l | 36.42 | l | 23.37 | k | 16.35 | h | 29.50 | i | |
2006 | 15.68 | l | 19.89 | i | 24.61 | h | 29.85 | j | 39.64 | i | 50.77 | h | 56.71 | j | 54.90 | 43.79 | a | 36.41 | b | 27.60 | 18.67 | a | 36.28 | g | ||
2007 | 15.81 | 23.14 | 25.16 | l | 33.29 | i | 39.81 | j | 49.16 | e | 57.29 | 56.23 | 48.30 | 35.29 | 29.30 | 19.03 | 37.06 | c | ||||||||
2008 | 18.67 | a | 21.76 | 25.23 | 30.63 | 37.07 | a | 49.34 | a | 56.77 | 55.90 | 47.00 | 33.81 | 28.37 | c | 21.90 | 35.54 | |||||||||
2009 | 21.36 | f | 23.93 | a | 26.42 | 30.72 | a | 43.16 | 45.66 | a | 56.81 | 52.94 | 45.00 | a | 34.00 | 26.67 | 15.97 | 36.48 | a | |||||||
2010 | 18.55 | 20.89 | 25.84 | 31.87 | 36.10 | 47.73 | 58.77 | a | 55.52 | b | 47.00 | c | 39.31 | b | 23.90 | 26.55 | 36.00 | |||||||||
2011 | 5.11 | v | 22.96 | d | 30.29 | 30.73 | 36.68 | 45.39 | b | 55.00 | 56.00 | 47.70 | 35.35 | 26.13 | 14.77 | 36.46 | a | |||||||||
2012 | 21.46 | c | 21.10 | 27.59 | b | 31.27 | 41.45 | 48.76 | a | 57.87 | 55.65 | 45.97 | 36.06 | 26.23 | 19.61 | 36.09 | ||||||||||
2013 | 12.23 | 18.14 | 28.90 | a | 32.87 | 40.55 | 50.87 | 56.84 | 54.58 | 48.30 | 32.03 | 28.60 | 18.77 | 35.22 | ||||||||||||
2014 | 20.19 | 25.50 | 28.46 | c | 32.10 | 39.03 | 48.87 | 56.84 | 51.61 | 51.27 | 39.03 | 26.89 | c | 27.08 | f | 38.16 | a | |||||||||
2015 | 21.00 | c | 26.86 | 29.77 | 32.63 | 38.63 | a | 51.93 | 55.10 | 55.87 | 49.90 | 40.10 | 24.33 | 19.32 | 37.12 | |||||||||||
2016 | 19.47 | a | 21.28 | 29.13 | 31.97 | 39.26 | 52.20 | 55.52 | 53.83 | g | 47.10 | 40.74 | 28.27 | 25.03 | 35.45 | a | ||||||||||
2017 | 23.03 | b | 29.68 | 29.20 | a | 32.10 | 39.77 | 51.72 | a | 57.41 | d | 53.10 | 46.67 | 36.16 | 34.17 | 20.32 | 37.78 | |||||||||
2018 | 20.16 | 22.89 | 27.71 | 36.13 | 39.19 | 51.33 | 58.48 | b | 55.10 | 48.43 | 37.90 | 24.00 | a | ----- | z | 38.30 | a | |||||||||
2019 | ----- | z | 19.00 | f | 29.00 | 34.60 | 35.45 | 45.93 | 56.03 | 55.41 | b | 50.25 | b | 32.16 | 27.10 | a | 21.60 | a | 38.75 | b | ||||||
2020 | 21.61 | 22.34 | 30.61 | 33.53 | 41.65 | 50.20 | 56.03 | 56.77 | 47.54 | d | 35.94 | 29.20 | 14.80 | a | 36.69 | |||||||||||
2021 | 17.20 | a | 26.78 | s | 28.31 | e | 34.76 | i | 40.13 | 52.33 | 60.46 | r | 55.24 | b | 48.07 | 36.16 | 26.95 | j | 25.06 | 37.81 | d | |||||
2022 | 18.39 | 17.61 | 25.50 | e | 33.13 | 40.39 | 51.23 | 56.87 | 55.03 | 50.83 | 34.10 | 21.29 | b | 23.97 | 35.69 | |||||||||||
2023 | 19.32 | 19.23 | b | 26.29 | 29.67 | 38.35 | 42.87 | 56.42 | 55.21 | b | 47.61 | b | 35.97 | 27.00 | 20.52 | 34.87 | ||||||||||
2024 | 19.35 | 24.03 | 27.89 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.76 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 17.09 | 20.39 | 24.41 | 28.98 | 35.94 | 44.75 | 53.45 | 51.87 | 44.87 | 33.72 | 24.01 | 17.87 | 32.48 | |||||||||||||
S.D. | 4.60 | 4.40 | 3.89 | 3.26 | 3.16 | 4.27 | 2.85 | 3.02 | 3.26 | 3.21 | 3.43 | 3.69 | 2.48 | |||||||||||||
SKEW | -0.34 | 0.38 | -0.36 | -0.11 | 0.15 | 0.21 | -0.29 | -0.43 | -0.17 | -0.19 | 0.23 | 0.25 | 0.56 | |||||||||||||
MAX | 25.16 | 34.04 | 30.61 | 36.13 | 43.16 | 52.33 | 58.77 | 56.77 | 51.27 | 40.74 | 34.17 | 26.55 | 37.78 | |||||||||||||
MIN | 6.61 | 11.00 | 16.81 | 22.03 | 30.43 | 37.47 | 45.39 | 43.10 | 37.97 | 24.03 | 16.86 | 10.90 | 28.67 | |||||||||||||
YRS | 47 | 48 | 50 | 48 | 57 | 58 | 59 | 60 | 59 | 57 | 52 | 55 | 35 |