YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | 57.08 | 69.87 | 75.82 | c | 71.46 | d | 65.53 | 56.57 | b | 42.90 | a | 24.48 | 57.96 | d | ||||
1979 | 24.05 | 32.50 | a | 40.24 | 50.18 | 58.02 | a | 67.73 | 74.13 | 71.87 | 68.80 | 55.90 | 35.92 | 31.81 | 50.93 | |||||||||||
1980 | 33.84 | 38.93 | 41.21 | 48.38 | 56.50 | 70.67 | 75.90 | 72.61 | 64.62 | 50.55 | 40.43 | b | 37.10 | 52.56 | ||||||||||||
1981 | 34.00 | a | 36.88 | 41.06 | 54.43 | 58.37 | a | 70.68 | 73.92 | 71.87 | 64.80 | 51.21 | 43.90 | 33.50 | 52.89 | |||||||||||
1982 | 29.50 | b | 31.30 | a | 42.03 | 48.45 | a | 57.19 | 67.22 | 73.35 | 72.21 | 65.00 | 50.48 | a | 39.24 | a | 31.02 | b | 50.58 | |||||||
1983 | 30.69 | 36.34 | c | 41.60 | b | 45.14 | b | 56.19 | b | 66.32 | 73.92 | a | 75.03 | a | 67.24 | a | 54.44 | 40.50 | 33.52 | e | 51.74 | |||||
1984 | 28.44 | 33.63 | b | ----- | z | 46.88 | b | ----- | z | 68.72 | 76.02 | 73.61 | 66.22 | 46.97 | 42.16 | a | 34.55 | a | 51.72 | b | ||||||
1985 | 30.39 | 31.09 | a | 43.30 | a | 52.45 | 60.42 | 70.53 | 75.52 | 74.11 | 61.85 | 53.89 | 39.92 | 31.18 | 52.05 | |||||||||||
1986 | 35.76 | 38.52 | 46.69 | 51.17 | 59.52 | 69.55 | 72.32 | 74.15 | 62.08 | 51.94 | 39.88 | 32.84 | 52.87 | |||||||||||||
1987 | 28.63 | a | 35.84 | 38.24 | b | 53.00 | 59.34 | 70.02 | 73.34 | 71.24 | 64.65 | 55.74 | 39.30 | 29.29 | 51.55 | |||||||||||
1988 | 24.25 | a | 35.57 | 40.82 | 50.22 | a | 59.34 | 71.47 | 76.02 | 73.47 | 63.95 | 57.97 | 41.27 | 30.45 | 52.07 | |||||||||||
1989 | 26.56 | 34.30 | 48.60 | 56.35 | 62.79 | 69.70 | 77.81 | 72.27 | 68.37 | 54.18 | 40.98 | 30.61 | 53.54 | |||||||||||||
1990 | 28.42 | 34.98 | 46.06 | 53.70 | 58.92 | 74.25 | 76.31 | 73.00 | 68.97 | 53.73 | 41.97 | 22.02 | d | 52.69 | ||||||||||||
1991 | 25.23 | 36.68 | 40.71 | 49.38 | a | 59.26 | 68.02 | 74.50 | 73.63 | 65.43 | 55.32 | 37.97 | 29.31 | 51.29 | ||||||||||||
1992 | 27.70 | a | 38.38 | 45.24 | 55.42 | 62.21 | 68.10 | 71.65 | 72.65 | a | 65.30 | 56.32 | 34.78 | 25.45 | b | 51.93 | ||||||||||
1993 | 34.33 | e | 37.60 | b | 44.10 | 51.02 | 60.50 | 68.52 | 73.53 | a | 71.18 | 63.82 | 51.95 | 36.87 | c | 31.52 | b | 52.08 | ||||||||
1994 | 32.52 | 34.42 | d | 46.23 | 51.28 | a | 61.16 | 73.10 | 76.74 | 76.10 | 65.77 | 52.44 | 38.36 | a | 34.57 | b | 53.56 | |||||||||
1995 | 32.90 | b | 42.88 | b | 44.07 | a | 46.73 | b | 56.53 | b | 66.55 | a | 74.35 | 75.66 | 66.68 | 52.88 | b | 43.93 | 34.71 | 53.16 | ||||||
1996 | 31.98 | a | 40.57 | 43.15 | a | 51.10 | 64.05 | 70.62 | 75.79 | 72.75 | a | 61.69 | a | 52.91 | d | 40.10 | a | 31.43 | c | 53.01 | ||||||
1997 | 28.52 | e | 35.52 | e | 45.76 | 46.65 | 61.58 | a | 69.78 | 74.19 | 73.03 | 68.17 | 52.77 | a | 40.87 | 30.66 | b | 52.29 | ||||||||
1998 | 33.64 | b | 35.09 | a | 42.12 | a | 47.62 | 61.19 | 66.82 | 76.97 | 74.27 | 69.83 | 53.85 | 42.32 | 32.03 | 52.98 | ||||||||||
1999 | 35.24 | 39.04 | 47.28 | b | 48.88 | a | 58.10 | a | 67.90 | 74.05 | 70.50 | 62.90 | 54.39 | 45.43 | 29.52 | a | 52.77 | |||||||||
2000 | 34.27 | 39.81 | b | 41.84 | b | 54.09 | a | 62.95 | 71.41 | a | 75.19 | 74.76 | 68.29 | a | 54.08 | 35.04 | b | 33.90 | a | 53.80 | ||||||
2001 | 30.71 | c | 36.61 | a | 44.65 | a | 54.22 | c | 63.32 | 71.47 | 77.11 | 73.79 | 69.71 | a | 57.33 | a | 44.66 | a | 29.80 | c | 54.45 | |||||
2002 | 31.40 | b | 32.83 | a | 41.36 | b | 56.58 | 62.39 | 74.68 | 77.56 | 73.84 | 65.15 | 52.48 | a | 39.68 | 32.55 | b | 53.38 | ||||||||
2003 | 37.82 | a | 36.07 | 43.42 | 51.00 | 62.60 | 70.45 | 80.35 | a | 76.44 | 65.73 | 58.47 | 40.48 | 33.77 | a | 54.72 | ||||||||||
2004 | 30.09 | b | 33.38 | a | 50.48 | a | 52.15 | 63.00 | 71.65 | 75.05 | 72.84 | 64.63 | 53.61 | 40.42 | 32.31 | 53.30 | ||||||||||
2005 | ----- | z | 39.59 | a | 42.68 | 52.32 | 62.45 | 69.26 | a | 79.19 | 73.13 | 68.40 | 55.89 | 42.84 | a | 31.63 | 56.13 | a | ||||||||
2006 | 33.45 | 36.43 | 43.44 | 54.70 | 65.06 | 74.30 | 77.61 | 72.61 | 61.03 | 51.57 | a | 43.78 | 31.06 | 53.75 | ||||||||||||
2007 | 27.29 | 36.79 | 46.11 | 52.10 | 61.08 | 71.93 | 77.45 | 76.23 | 67.32 | 54.37 | 43.52 | 29.66 | 53.65 | |||||||||||||
2008 | 23.90 | 33.26 | 42.18 | 46.12 | 56.90 | 69.77 | 75.19 | 74.15 | 65.73 | 54.18 | 43.60 | 31.02 | 51.33 | |||||||||||||
2009 | 32.21 | 37.89 | 45.03 | 48.88 | 63.97 | a | 67.67 | a | 77.03 | 73.05 | 66.55 | 49.48 | b | 43.61 | b | 26.23 | 52.63 | |||||||||
2010 | 26.05 | 33.30 | a | 41.32 | 51.32 | 57.40 | 71.48 | 76.10 | 71.98 | 67.38 | 56.08 | 38.95 | 37.92 | a | 52.44 | |||||||||||
2011 | 24.34 | 31.54 | 45.06 | 50.12 | 56.31 | 70.97 | 76.26 | 75.73 | 65.38 | 52.40 | 40.00 | 29.74 | 51.49 | |||||||||||||
2012 | 32.47 | 34.93 | 44.67 | b | 54.41 | a | 62.68 | 73.54 | c | 75.55 | 75.16 | 66.88 | 54.87 | a | 44.08 | 31.45 | 54.22 | |||||||||
2013 | 24.02 | 31.75 | 44.18 | 50.12 | 58.90 | b | 72.77 | 76.47 | 73.11 | 67.02 | 50.15 | 40.85 | 27.69 | 51.42 | ||||||||||||
2014 | 32.15 | 39.05 | 44.24 | 50.15 | 59.16 | 70.65 | 77.45 | 72.02 | 69.05 | 56.18 | 41.67 | 34.52 | 53.86 | |||||||||||||
2015 | 32.61 | 39.73 | 47.32 | a | 51.07 | 57.47 | 71.70 | 73.61 | 73.90 | 68.42 | 58.60 | 40.80 | 29.48 | 53.73 | ||||||||||||
2016 | 29.05 | 38.07 | 45.48 | 50.95 | 58.81 | 75.98 | 76.36 | f | 70.82 | c | 65.50 | 58.24 | 45.12 | 33.66 | 51.97 | a | ||||||||||
2017 | 32.52 | 41.50 | 48.85 | 50.30 | 58.27 | 73.45 | 77.44 | 73.48 | 66.73 | 54.42 | a | 47.74 | a | 34.63 | a | 54.94 | ||||||||||
2018 | 35.08 | 39.07 | a | 43.79 | 54.95 | 63.78 | a | 73.17 | 79.63 | 76.08 | 69.28 | 53.13 | 37.34 | a | 32.06 | 54.78 | ||||||||||
2019 | 30.03 | 32.98 | a | 46.66 | 54.73 | 54.58 | 67.50 | a | 74.40 | a | 74.55 | a | 68.72 | g | 48.09 | c | 39.73 | 31.65 | 50.45 | a | ||||||
2020 | 30.02 | 33.57 | 43.21 | 50.33 | 62.16 | 70.13 | 73.95 | 75.89 | 65.08 | 53.73 | 44.00 | 27.19 | 52.44 | |||||||||||||
2021 | 29.90 | 34.70 | 40.84 | 52.03 | 60.65 | 73.13 | 77.02 | 72.81 | 66.47 | 52.18 | 44.22 | 34.00 | b | 53.16 | ||||||||||||
2022 | 31.56 | 33.80 | 44.18 | 54.93 | 64.45 | 75.75 | 81.52 | 78.19 | 74.05 | 55.69 | 37.05 | 33.05 | 55.35 | |||||||||||||
2023 | 31.10 | 32.05 | 40.00 | 51.63 | 64.32 | 70.32 | 82.00 | 78.42 | 70.47 | 58.34 | 43.73 | 34.19 | 54.71 | |||||||||||||
2024 | 31.65 | 39.84 | 44.65 | 51.06 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.71 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 30.45 | 36.06 | 43.87 | 51.28 | 60.24 | 70.64 | 75.98 | 73.69 | 66.35 | 53.91 | 41.13 | 31.41 | 52.93 | |||||||||||||
S.D. | 3.49 | 2.97 | 2.60 | 2.82 | 2.73 | 2.44 | 2.24 | 1.81 | 2.55 | 2.68 | 2.86 | 3.09 | 1.18 | |||||||||||||
SKEW | -0.31 | 0.20 | 0.28 | -0.13 | -0.05 | 0.24 | 0.67 | 0.62 | 0.28 | -0.30 | -0.21 | -0.72 | 0.09 | |||||||||||||
MAX | 37.82 | 42.88 | 50.48 | 56.58 | 65.06 | 75.98 | 82.00 | 78.42 | 74.05 | 58.60 | 47.74 | 37.92 | 55.35 | |||||||||||||
MIN | 23.90 | 31.09 | 38.24 | 45.14 | 54.58 | 66.32 | 71.65 | 70.50 | 61.03 | 46.97 | 34.78 | 22.02 | 50.58 | |||||||||||||
YRS | 45 | 46 | 45 | 45 | 45 | 46 | 45 | 46 | 45 | 46 | 46 | 46 | 41 |