DAYTON 1 WSW, WASHINGTON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(452030)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1893 ----- z ----- z ----- z 35.87 42.23 43.80 51.73 e ----- z 45.83 38.03 29.87 32.52 39.98
1894 25.39 23.64 33.77 ----- z ----- z 49.93 55.39 57.68 47.13 ----- z ----- z ----- z 41.85
1895 ----- z ----- z ----- z 40.30 ----- z ----- z ----- z 53.32 42.17 34.68 ----- z ----- z 42.62
1896 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 26.63 33.03 29.83
1897 24.55 30.54 29.29 40.77 48.16 50.80 ----- z 56.03 47.53 37.52 31.46 d 27.71 38.58
1898 24.71 35.43 30.61 40.33 41.94 49.33 ----- z ----- z 44.67 37.52 31.13 18.87 35.45
1899 27.29 20.86 32.52 34.47 o 40.16 44.07 51.55 48.74 46.03 36.19 36.67 29.35 37.58
1900 30.03 24.89 37.03 a 38.03 42.94 51.13 48.35 60.29 47.50 37.26 28.63 29.90 39.67
1901 22.77 23.75 35.29 32.33 45.53 a 41.83 46.94 49.50 e ----- z ----- z ----- z ----- z 37.24
1902 25.10 29.86 ----- z 36.67 41.61 49.32 b ----- z ----- z ----- z ----- z ----- z ----- z 36.51
1903 ----- z ----- z 32.29 36.40 42.48 53.50 52.06 51.58 47.17 39.35 33.97 28.52 41.73
1904 30.23 30.45 32.16 42.07 ----- z 50.13 55.87 56.35 50.47 41.19 34.43 29.19 41.14
1905 28.35 23.36 36.35 40.33 42.52 51.47 56.81 52.29 49.03 36.52 28.87 28.39 39.52
1906 30.58 32.54 29.65 40.13 43.61 48.37 61.77 54.55 ----- z ----- z ----- z ----- z 42.65
1907 ----- z ----- z ----- z ----- z 46.19 50.20 55.35 52.26 48.23 42.71 34.31 a 31.74 45.13
1908 29.26 30.66 35.58 38.50 42.16 48.73 58.13 56.19 48.87 40.48 34.20 27.35 40.84
1909 17.03 33.96 33.13 35.43 42.19 50.17 52.97 51.94 49.30 40.68 35.43 22.45 38.72
1910 22.13 20.71 38.45 ----- z 47.65 50.07 55.13 57.26 51.40 48.29 36.23 30.55 41.62
1911 27.19 21.82 33.29 35.43 42.39 50.79 b 58.10 51.90 45.97 37.61 29.20 28.45 38.51
1912 25.58 32.24 29.68 38.13 45.42 51.63 54.74 52.84 45.63 36.16 35.43 29.13 39.72
1913 22.65 20.39 30.90 38.77 45.87 52.10 55.90 58.84 47.73 37.68 36.13 23.10 39.17
1914 35.06 29.29 36.97 39.43 45.97 50.20 58.87 55.52 47.27 39.81 33.07 19.39 40.90
1915 24.16 31.46 35.00 40.83 45.61 48.87 54.45 56.74 44.57 39.16 32.87 28.94 40.22
1916 8.55 25.52 35.65 39.31 a 43.28 b 49.33 55.84 55.13 48.10 37.68 27.07 22.26 37.31
1917 25.94 28.89 29.26 39.03 45.61 47.37 56.03 58.35 49.50 f 40.23 35.47 37.90 40.37
1918 31.90 29.32 36.61 38.30 40.48 53.53 56.29 53.35 51.30 46.94 32.03 29.23 41.61
1919 26.90 29.86 35.74 41.37 42.26 44.60 55.13 55.39 46.90 35.90 30.27 14.23 38.21
1920 24.32 28.14 33.10 36.33 40.32 48.33 56.16 55.53 a 47.17 39.97 32.27 31.26 39.41
1921 28.90 31.46 36.45 38.40 43.94 52.10 51.10 52.45 44.10 40.10 a 32.83 23.39 39.60
1922 16.90 25.11 32.23 36.07 42.32 54.30 57.68 55.97 52.17 43.52 29.07 23.97 a 39.11
1923 33.03 20.54 34.06 38.17 43.90 49.17 54.58 51.55 48.03 39.55 33.30 28.74 39.55
1924 20.77 36.10 32.13 36.30 47.97 50.23 51.39 50.68 47.57 40.97 32.63 17.45 38.68
1925 32.77 36.43 34.00 41.17 46.42 51.47 57.06 51.97 47.60 37.71 32.43 32.00 41.75
1926 28.61 35.75 34.13 43.20 44.58 52.17 55.58 52.23 42.13 41.39 34.50 27.16 40.95
1927 22.74 32.75 33.23 37.47 41.52 50.67 53.55 53.65 46.50 40.48 38.77 20.35 39.31
1928 24.65 26.90 36.06 37.03 46.77 48.97 56.48 52.10 44.63 40.77 32.53 24.68 39.30
1929 13.26 12.93 35.23 35.03 46.71 57.30 j 51.65 54.16 44.67 37.35 26.40 31.42 35.35
1930 1.71 35.25 35.03 42.83 41.97 47.23 54.16 54.84 48.47 36.65 29.93 25.00 37.76
1931 31.10 a 29.32 34.84 37.77 45.61 51.73 54.00 52.52 45.17 36.16 28.00 23.77 39.17
1932 24.68 26.41 34.71 39.03 43.81 50.03 52.39 52.00 45.67 39.74 37.23 21.16 38.91
1933 29.06 21.50 34.06 38.17 40.81 49.13 53.06 53.45 44.37 42.48 33.47 35.45 39.59
1934 35.06 32.54 38.39 45.27 46.45 51.00 52.61 54.39 45.37 42.58 39.93 31.35 42.91
1935 26.42 30.25 31.45 36.07 43.39 50.67 52.84 52.35 48.27 39.94 27.80 27.23 38.89
1936 30.42 11.76 33.19 43.07 48.87 52.93 54.10 54.61 45.80 38.52 22.33 30.55 38.85
1937 4.61 26.00 35.23 37.87 44.19 52.27 57.61 51.61 48.13 42.19 36.50 31.42 38.97
1938 28.23 29.82 34.61 39.37 43.81 51.77 57.35 50.97 51.13 41.29 29.13 28.74 40.52
1939 31.19 26.32 36.10 38.83 44.61 48.27 55.65 53.87 48.07 40.58 32.33 33.03 40.74
1940 26.42 34.34 37.39 40.93 46.71 52.93 55.77 52.94 52.37 43.52 26.77 26.97 41.42
1941 27.10 30.75 35.39 41.47 44.58 49.03 57.65 56.19 47.80 39.03 33.93 30.90 41.15
1942 12.94 28.50 33.13 40.20 43.10 48.27 56.23 55.81 48.60 39.52 32.73 31.03 39.17
1943 19.20 a 30.32 30.87 41.70 42.35 47.30 54.52 51.84 47.60 40.81 31.60 27.26 38.78
1944 24.87 28.76 31.03 38.77 44.26 49.63 53.93 a 52.94 50.10 40.19 32.03 26.16 39.39
1945 31.39 32.25 32.77 36.90 45.45 47.87 54.97 54.74 46.43 40.61 34.07 25.55 40.25
1946 29.61 32.14 35.39 39.10 43.65 48.87 54.26 52.71 47.00 37.26 31.00 a 29.90 40.07
1947 21.16 30.25 37.32 40.70 48.48 49.63 53.45 51.97 50.60 44.42 33.40 30.97 41.03
1948 26.58 26.28 30.13 37.77 44.03 53.77 51.87 51.26 45.73 35.52 32.97 22.23 38.18
1949 7.00 25.32 33.10 39.23 47.58 45.83 52.23 51.23 48.03 34.30 a 35.30 28.52 37.31
1950 6.97 a 25.86 33.35 35.60 41.61 51.07 54.58 55.19 47.33 41.52 33.97 32.16 38.27
1951 26.13 27.29 29.16 31.93 41.84 43.93 50.58 49.45 43.80 38.35 30.47 23.58 36.38
1952 20.77 30.00 32.26 37.03 42.42 46.23 49.13 49.84 44.97 36.42 23.10 29.90 36.84
1953 38.52 31.14 34.03 35.20 40.03 44.67 47.68 50.84 43.93 37.13 33.77 31.87 39.07
1954 24.52 32.36 26.94 34.53 40.32 43.97 48.10 47.19 42.47 33.06 35.93 26.39 36.31
1955 24.94 25.93 26.77 33.63 40.35 49.73 52.35 49.19 44.83 40.19 26.03 24.81 36.56
1956 26.52 20.00 33.06 38.73 46.23 47.60 54.13 52.39 44.50 39.26 29.07 29.84 38.44
1957 10.97 28.25 33.68 38.73 47.13 51.27 52.52 49.68 46.37 38.68 29.13 31.77 38.18
1958 30.81 38.39 31.55 39.10 49.65 54.77 58.23 57.03 47.43 37.81 33.37 31.55 42.47
1959 27.48 29.89 34.68 38.87 41.71 50.07 54.94 51.74 47.97 39.48 26.53 26.55 39.16
1960 15.68 28.34 33.10 39.03 42.06 48.00 56.90 52.58 45.07 40.10 32.27 24.68 38.15
1961 28.29 36.82 36.48 38.47 45.16 53.27 57.52 57.32 43.03 37.68 25.73 27.97 40.65
1962 23.87 28.61 31.42 38.90 42.10 46.53 51.29 52.42 45.87 39.06 34.60 30.61 38.77
1963 17.77 32.11 34.55 37.40 43.65 50.03 52.42 53.74 51.20 41.71 35.23 27.19 39.75
1964 31.74 28.34 31.84 35.77 41.87 49.83 54.74 50.74 43.83 37.35 31.83 24.03 38.49
1965 29.16 32.29 28.90 40.67 42.87 49.30 56.29 56.74 43.97 40.74 35.60 26.77 40.28
1966 30.29 30.25 33.55 37.33 44.48 47.53 54.06 54.00 50.43 38.84 34.80 32.90 40.71
1967 34.26 31.43 33.23 34.60 43.39 52.37 56.84 56.06 52.00 40.84 31.67 27.48 41.18
1968 27.42 33.34 36.58 35.27 43.97 50.40 56.94 53.61 50.03 36.87 33.60 24.71 40.23
1969 15.10 27.54 32.48 38.57 46.68 54.17 53.39 51.84 49.67 36.65 31.83 30.29 39.02
1970 26.71 33.11 32.58 34.67 44.07 a 53.77 58.06 53.77 44.17 36.77 32.50 27.94 39.84
1971 31.10 29.39 29.65 35.00 43.97 46.10 53.03 56.42 42.93 33.45 31.97 26.48 38.29
1972 ----- z 26.72 35.97 35.33 44.94 50.93 54.29 57.06 46.17 37.19 33.30 20.16 40.19
1973 22.06 28.89 34.81 36.43 44.90 ----- z 55.19 53.13 48.10 39.48 32.70 32.58 38.94
1974 19.32 32.79 33.61 39.60 42.55 51.40 54.90 55.84 47.10 ----- z 35.13 30.90 40.29
1975 27.16 26.82 30.48 34.37 43.00 48.40 58.84 52.26 46.00 42.19 30.77 30.06 39.20
1976 29.48 29.03 31.39 37.63 42.65 47.30 54.48 53.68 49.03 36.55 33.20 26.00 39.20
1977 20.77 30.86 33.68 38.33 42.42 53.20 54.58 57.55 46.53 37.32 30.13 29.68 39.59
1978 27.03 32.43 34.32 38.80 43.06 50.47 55.00 55.03 47.57 35.87 24.87 20.48 38.74
1979 8.97 27.96 34.77 39.00 45.74 51.40 55.84 55.52 48.57 41.84 28.90 31.03 39.13
1980 19.71 29.17 33.13 40.43 43.90 47.70 55.32 50.96 c 47.53 36.58 33.57 30.42 39.04
1981 31.23 31.29 33.61 38.63 44.87 47.77 52.29 54.94 46.73 37.65 33.77 28.97 40.14
1982 25.39 28.46 33.61 34.60 43.32 52.40 54.81 55.23 46.63 37.00 29.10 28.77 39.11
1983 31.35 34.04 36.16 36.37 44.58 49.30 53.42 57.23 43.97 37.48 36.87 16.74 39.79
1984 24.94 29.76 36.00 36.90 41.97 47.67 53.68 54.90 44.87 34.52 33.63 20.94 38.31
1985 21.13 a 21.93 29.97 39.37 44.55 48.10 58.10 52.13 43.57 37.19 21.10 13.52 35.89
1986 27.74 30.71 38.06 37.93 45.61 53.13 52.52 57.13 44.47 38.87 34.83 26.26 40.61
1987 21.55 30.64 36.87 41.77 46.97 51.73 55.26 52.10 47.93 36.06 33.27 25.97 40.01
1988 25.68 28.72 32.55 40.03 44.13 50.77 54.45 53.35 46.47 42.39 36.30 26.65 40.12
1989 28.81 16.07 33.94 41.33 44.39 52.37 53.90 55.06 46.70 38.29 36.17 28.39 39.62
1990 33.10 26.93 33.65 41.80 44.10 50.93 56.29 56.55 49.77 39.32 36.70 16.29 40.45
1991 24.00 34.14 32.10 37.70 43.52 48.03 54.65 56.84 47.90 36.68 33.93 30.90 40.03
1992 32.00 35.21 35.97 42.07 46.68 54.40 56.29 54.58 46.27 39.58 33.27 26.03 41.86
1993 17.68 22.18 33.39 40.93 49.26 52.27 53.39 52.87 46.37 40.39 23.23 30.71 38.55
1994 33.35 27.32 34.16 41.97 47.03 49.90 56.39 54.77 49.10 38.19 32.90 29.58 41.22
1995 27.23 33.00 34.26 37.97 45.61 49.87 56.77 51.48 50.33 39.00 37.07 28.61 40.93
1996 26.55 23.59 33.48 41.17 43.23 49.90 57.29 54.77 46.43 40.29 31.93 28.65 39.77
1997 26.35 32.00 36.52 37.73 48.65 51.23 55.16 57.06 50.50 39.00 34.97 28.13 41.44
1998 29.55 33.93 35.19 38.73 45.16 52.47 59.87 55.90 52.40 37.74 36.33 27.74 42.09
1999 32.97 32.21 34.06 36.53 41.16 49.87 52.42 57.90 44.03 37.45 36.70 32.77 40.67
2000 29.32 32.28 34.26 41.03 a 47.03 50.47 54.97 50.39 47.70 38.74 26.40 25.42 39.83
2001 27.29 27.71 34.94 38.23 45.29 50.03 55.45 56.13 50.03 38.84 33.57 28.61 40.51
2002 29.35 29.00 32.10 38.73 43.74 52.43 57.58 53.35 46.80 34.16 31.50 32.29 40.09
2003 34.26 29.57 39.06 39.00 45.52 51.50 57.42 55.84 50.20 42.55 27.43 27.81 41.68
2004 23.06 31.31 36.65 38.97 46.71 51.53 56.35 58.19 48.13 41.10 33.00 29.00 41.17
2005 26.71 25.04 35.87 38.90 48.48 49.37 ----- z ----- z ----- z ----- z ----- z ----- z 37.39
2006 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
2007 23.74 30.14 36.00 27.77 h 29.81 j ----- z ----- z ----- z ----- z ----- z 18.67 ----- z 27.14
2008 ----- z 23.93 ----- z 23.46 d 32.90 ----- z ----- z ----- z ----- z ----- z 33.63 20.00 26.79
2009 25.00 26.43 29.26 36.33 43.84 50.60 56.23 a 55.74 46.33 35.00 31.63 20.16 38.05
2010 31.58 31.43 31.58 38.13 41.48 49.53 53.39 53.03 48.07 41.13 28.37 27.74 39.62
2011 26.52 24.93 33.65 34.76 a 40.90 47.40 e 51.42 54.03 49.33 i 41.39 29.83 23.48 37.12
2012 24.19 28.17 31.68 37.97 42.81 48.00 55.45 53.48 44.97 36.74 36.73 30.93 a 39.26
2013 23.29 c 29.82 32.21 c ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 28.44
Period of Record Statistics
MEAN 25.21 28.79 33.66 38.23 44.09 49.87 54.67 53.90 47.10 38.95 32.01 27.34 39.56
S.D. 6.71 4.62 2.43 2.77 2.46 2.51 2.53 2.46 2.37 2.60 3.79 4.44 1.36
SKEW -1.24 -0.99 -0.36 -1.28 -0.51 -0.61 -0.46 -0.02 0.18 0.52 -0.93 -0.86 -0.21
MAX 38.52 38.39 39.06 45.27 49.65 54.77 61.77 60.29 52.40 48.29 39.93 37.90 42.91
MIN 1.71 11.76 26.77 23.46 32.90 41.83 46.94 47.19 42.13 33.06 18.67 13.52 35.89
NO YRS 113 115 114 113 114 113 111 112 110 110 113 112 96