YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1945 | -2.23 | -2.54 | -2.26 | 13.87 | 28.13 | 42.93 | 49.35 | 46.48 | 36.30 | 17.45 | -8.30 | -6.58 | 17.72 | |||||||||||||
1946 | -8.61 | -6.32 | -13.00 | 12.60 | 35.13 | 48.10 | 51.16 | 44.65 | 35.70 | 23.61 | -10.50 | -25.60 | a | 15.58 | ||||||||||||
1947 | -28.29 | -10.18 | 4.23 | 19.70 | 35.74 | 44.67 | 50.65 | 41.81 | 33.20 | 16.32 | 1.48 | a | -6.94 | 16.87 | ||||||||||||
1948 | -11.45 | -13.45 | -5.68 | 12.20 | 32.94 | 48.37 | 47.03 | 41.13 | 31.90 | 16.10 | -9.03 | -20.87 | 14.10 | |||||||||||||
1949 | -15.16 | -13.11 | 6.55 | 9.17 | 30.55 | 41.57 | 49.32 | 45.61 | 39.63 | ----- | z | ----- | z | ----- | z | 21.57 | c | |||||||||
1950 | ----- | z | -21.36 | 6.06 | 16.90 | 34.32 | 45.73 | 51.35 | 48.23 | 38.27 | 20.23 | -7.73 | -11.90 | 20.01 | a | |||||||||||
1951 | -20.84 | -11.07 | -7.90 | 22.83 | 35.61 | 43.77 | 49.94 | 47.45 | 36.40 | 14.26 | 9.43 | -15.10 | 17.07 | |||||||||||||
1952 | -18.94 | -10.00 | -2.84 | 14.07 | 28.13 | 43.63 | 48.26 | 43.10 | 33.97 | 22.94 | 8.13 | -9.29 | 16.76 | |||||||||||||
1953 | -18.43 | a | -9.68 | -4.65 | 21.87 | 37.48 | 48.63 | 51.10 | 46.77 | 36.67 | 16.74 | -5.20 | -8.16 | 17.76 | ||||||||||||
1954 | -17.45 | -24.14 | 1.68 | 16.67 | 37.19 | 48.13 | 48.81 | 47.39 | 35.70 | 25.19 | 9.40 | -24.06 | 17.04 | |||||||||||||
1955 | -11.48 | -18.11 | -0.19 | 9.60 | 33.74 | 44.93 | 50.61 | 45.42 | 36.80 | 16.94 | -13.97 | -13.87 | 15.04 | |||||||||||||
1956 | -21.35 | -15.03 | -3.10 | 18.13 | 36.74 | 46.87 | 51.58 | 48.06 | 35.77 | 11.10 | -15.33 | -28.32 | 13.76 | |||||||||||||
1957 | -3.81 | -9.89 | 5.45 | 21.43 | 38.81 | 54.20 | 50.87 | 51.26 | 36.60 | 23.81 | 10.53 | -18.90 | 21.70 | |||||||||||||
1958 | -5.26 | 1.54 | 9.55 | 22.27 | 36.97 | 51.17 | 52.10 | 48.65 | 37.07 | 10.39 | -2.47 | -9.61 | 21.03 | |||||||||||||
1959 | -15.10 | 1.67 | a | -17.26 | 15.00 | 36.58 | 51.07 | 48.19 | 46.10 | 36.23 | 17.42 | 4.83 | -10.48 | 17.85 | ||||||||||||
1960 | -9.19 | -2.97 | -1.61 | 13.27 | 40.58 | 45.93 | 52.42 | 47.55 | 34.67 | 21.84 | -5.93 | 2.90 | 19.95 | |||||||||||||
1961 | -1.68 | -7.64 | -10.19 | 15.63 | 37.19 | 48.13 | 49.26 | 46.16 | 37.93 | 16.06 | -9.20 | -24.10 | 16.46 | |||||||||||||
1962 | -10.03 | 2.43 | 0.42 | 18.13 | 32.45 | 47.30 | 54.06 | 48.52 | 34.30 | 23.90 | -0.07 | -8.37 | a | 20.25 | ||||||||||||
1963 | -3.13 | -3.68 | 0.37 | a | 17.07 | 36.71 | 42.80 | 50.61 | 46.32 | 38.20 | 20.68 | -10.00 | -1.71 | 19.52 | ||||||||||||
1964 | -20.58 | -7.76 | -7.45 | 16.23 | 27.58 | 47.37 | 51.52 | 47.71 | 37.17 | 24.03 | 0.87 | -28.68 | 15.67 | |||||||||||||
1965 | -13.35 | -16.32 | 19.03 | 21.90 | 32.29 | 46.47 | 50.45 | 45.39 | 40.97 | 5.55 | 2.20 | -19.71 | 17.90 | |||||||||||||
1966 | -20.40 | a | -12.04 | -7.71 | 13.93 | ----- | z | 50.20 | 49.03 | 45.23 | 38.17 | 16.65 | -1.43 | -21.00 | 13.69 | a | ||||||||||
1967 | -19.74 | -8.82 | 7.81 | 22.87 | 35.74 | 48.97 | 51.27 | a | ----- | z | 37.87 | 21.32 | c | 2.93 | -8.81 | 17.40 | a | |||||||||
1968 | -11.27 | a | -8.75 | a | 1.10 | 16.63 | 34.35 | 48.10 | 53.45 | 48.58 | ----- | z | 18.71 | 0.60 | -18.23 | 16.66 | a | |||||||||
1969 | -24.26 | -13.18 | -2.07 | b | 19.57 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -4.98 | h | ||
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 | -12.35 | h | -6.90 | 9.30 | j | 33.58 | g | 42.79 | b | 50.39 | 43.80 | a | 35.27 | 15.11 | d | -13.63 | c | -25.62 | b | 17.65 | d | |||
1976 | -15.17 | a | -23.68 | a | -3.54 | c | 15.23 | 33.48 | d | 44.29 | b | 48.93 | d | 45.96 | f | 33.88 | m | 8.60 | p | 3.81 | d | -8.33 | a | 10.56 | c | |
1977 | 2.10 | 0.43 | -10.56 | f | 12.00 | e | 31.33 | a | 45.83 | 46.19 | d | 49.00 | j | 39.93 | b | 18.26 | -11.62 | a | -16.14 | q | 20.49 | c | ||||
1978 | -3.55 | b | -8.38 | g | -2.61 | c | 16.87 | ----- | z | 43.30 | 50.29 | c | 46.78 | h | 36.60 | 16.58 | 7.11 | l | -1.04 | g | 22.50 | e | ||||
1979 | -13.71 | g | -22.50 | -3.44 | o | 3.40 | t | 37.91 | i | 45.45 | a | 48.30 | u | 46.86 | i | 35.67 | 27.84 | l | 8.64 | e | -17.70 | a | 9.91 | g | ||
1980 | -33.06 | m | 0.21 | -1.65 | 19.21 | b | 35.29 | c | 44.37 | 51.48 | f | 45.61 | 33.46 | f | 21.92 | r | -4.05 | h | ----- | z | 23.84 | f | ||||
1981 | 5.87 | h | ----- | z | 9.12 | e | 17.30 | 37.12 | f | 42.60 | 46.71 | 42.67 | d | 34.93 | 24.81 | 2.28 | a | ----- | z | 27.55 | d | |||||
1982 | -13.21 | b | -8.64 | 2.07 | a | 11.93 | b | 31.45 | 46.86 | a | 50.87 | 46.23 | 37.04 | c | 10.53 | a | -1.79 | b | -3.87 | a | 17.46 | |||||
1983 | -19.39 | -8.26 | a | -4.20 | a | 19.77 | 34.77 | a | 46.35 | d | 49.13 | 43.13 | 29.87 | 16.31 | b | -2.07 | -6.50 | e | 16.58 | |||||||
1984 | -19.14 | b | -21.03 | 5.55 | 10.83 | 29.90 | b | 45.27 | 48.45 | 42.71 | 33.77 | 16.00 | -5.03 | a | -11.52 | b | 14.65 | |||||||||
1985 | -0.13 | a | -19.93 | 1.42 | -0.10 | a | 29.16 | 42.90 | 49.06 | 45.23 | 35.97 | a | 13.42 | -11.93 | -4.90 | a | 15.01 | |||||||||
1986 | -7.75 | c | -6.18 | -8.74 | 8.67 | 33.00 | 45.40 | 48.90 | 42.07 | a | 35.93 | a | 18.65 | -7.21 | a | -6.18 | i | 18.43 | a | |||||||
1987 | -10.59 | b | -10.70 | a | -4.17 | b | 16.97 | 33.26 | 45.55 | a | 50.55 | i | ----- | z | ----- | z | ----- | z | -1.90 | i | -14.32 | c | 8.00 | e | ||
1988 | -9.90 | b | -4.03 | 4.06 | 18.77 | 39.32 | 48.10 | 52.79 | b | 46.76 | b | 34.33 | 11.65 | -8.78 | c | -6.40 | a | 18.89 | ||||||||
1989 | -33.52 | -5.21 | -4.48 | 22.57 | 34.61 | 46.87 | 52.45 | 49.06 | 38.24 | a | 17.21 | b | -12.67 | -8.07 | b | 16.42 | ||||||||||
1990 | -26.10 | k | ----- | z | 10.56 | m | 23.56 | e | 37.06 | o | 48.31 | q | 53.08 | r | 50.67 | v | 34.75 | j | 18.20 | a | -8.46 | b | -12.97 | b | 5.08 | h |
1991 | -25.27 | p | ----- | z | 2.92 | e | 16.64 | h | 35.25 | o | 50.90 | i | 49.60 | a | 44.94 | o | 38.33 | 18.69 | e | ----- | z | -13.07 | a | 19.30 | g | |
1992 | -10.38 | r | -7.43 | v | 5.17 | g | 19.61 | g | 28.59 | b | 47.83 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.59 | k |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | -5.93 | d | 17.93 | b | 36.33 | a | 46.17 | 52.94 | 44.32 | 37.33 | 27.36 | f | -1.88 | v | -9.45 | 27.46 | d | |||||
2010 | -12.32 | -4.50 | -0.71 | 21.67 | 38.77 | 47.10 | 50.06 | 48.42 | 37.07 | 21.35 | 7.63 | -16.43 | a | 19.84 | ||||||||||||
2011 | -6.50 | a | -11.46 | ----- | z | 14.61 | g | 36.90 | 47.33 | 47.97 | b | 45.13 | h | 38.23 | 22.58 | -12.50 | -0.87 | 17.96 | c | |||||||
2012 | -32.48 | -3.76 | -5.32 | 22.86 | a | 33.74 | 48.40 | 48.17 | a | 44.68 | 35.77 | 17.84 | -3.37 | -14.61 | 15.99 | |||||||||||
2013 | -3.77 | -6.50 | -4.68 | 7.53 | 29.81 | 52.63 | 51.53 | a | ----- | z | ----- | z | 29.71 | 4.27 | -5.97 | 15.46 | b | |||||||||
2014 | 1.68 | -6.86 | 3.52 | 11.59 | m | 38.03 | 43.73 | 49.00 | 47.29 | 35.43 | 19.48 | 6.53 | 2.58 | 21.86 | a | |||||||||||
2015 | -9.59 | b | -1.86 | 2.58 | 24.17 | 41.00 | 47.43 | 50.26 | 45.39 | 35.13 | 25.48 | 6.47 | -5.06 | 21.78 | ||||||||||||
2016 | 1.90 | 2.97 | 8.39 | 26.30 | 39.97 | 48.33 | 52.58 | 50.74 | 37.27 | 20.16 | -0.43 | -5.52 | 23.55 | |||||||||||||
2017 | -15.42 | -6.71 | -8.61 | 22.94 | m | 35.84 | 49.69 | a | 54.48 | 47.03 | 38.00 | 25.16 | 5.03 | 5.97 | 20.95 | a | ||||||||||
2018 | -8.39 | 2.11 | 7.32 | 19.67 | 36.19 | 46.30 | 51.84 | 47.84 | 40.23 | 27.00 | 7.47 | -3.65 | 22.83 | |||||||||||||
2019 | -7.48 | 2.18 | 16.61 | 24.43 | 38.81 | 52.00 | 54.74 | 47.87 | 38.30 | 25.68 | 7.23 | -10.65 | 24.14 | |||||||||||||
2020 | -18.52 | -12.41 | 0.39 | 23.00 | 40.00 | 47.10 | a | 49.97 | a | 48.79 | b | 37.41 | a | 23.06 | -1.63 | -4.13 | 19.42 | |||||||||
2021 | -3.50 | a | -13.07 | -3.59 | b | 15.87 | 38.00 | a | 48.72 | a | 52.42 | 46.61 | 34.30 | 21.32 | -2.83 | -4.06 | 19.18 | |||||||||
2022 | -5.19 | -3.18 | 6.81 | 16.13 | 36.55 | 50.43 | 50.52 | 46.42 | 38.80 | 23.29 | 5.57 | -3.71 | 21.87 | |||||||||||||
2023 | -4.13 | -4.29 | 0.39 | 8.00 | 36.77 | 46.83 | 53.52 | 50.55 | 36.13 | 17.67 | a | 8.63 | -11.16 | 19.91 | ||||||||||||
2024 | -15.26 | -4.21 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | -9.73 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -12.02 | -8.49 | -0.33 | 16.91 | 34.92 | 46.80 | 50.50 | 46.32 | 36.50 | 19.13 | -1.58 | -11.15 | 18.27 | |||||||||||||
S.D. | 8.50 | 7.13 | 6.87 | 5.28 | 3.48 | 2.73 | 1.95 | 2.35 | 2.07 | 4.84 | 7.57 | 8.15 | 2.73 | |||||||||||||
SKEW | -0.45 | -0.43 | 0.35 | -0.69 | -0.43 | 0.38 | 0.10 | -0.21 | -0.54 | -0.32 | -0.12 | -0.35 | 0.38 | |||||||||||||
MAX | 2.10 | 2.97 | 19.03 | 26.30 | 41.00 | 54.20 | 54.74 | 51.26 | 40.97 | 29.71 | 10.53 | 5.97 | 24.14 | |||||||||||||
MIN | -33.52 | -24.14 | -17.26 | -0.10 | 27.58 | 41.57 | 46.19 | 41.13 | 29.87 | 5.55 | -15.33 | -28.68 | 13.76 | |||||||||||||
YRS | 50 | 52 | 53 | 51 | 50 | 54 | 52 | 46 | 50 | 50 | 50 | 50 | 35 |