SILVERTON, OREGON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(357823)

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
1962 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 51.33 z 51.50 44.32 40.20 35.29 42.83
1963 26.97 40.07 36.35 39.13 45.16 50.03 51.03 53.74 53.03 45.71 40.10 32.45 42.82
1964 35.90 31.79 35.45 38.20 41.84 48.53 52.77 52.06 47.23 43.42 35.43 32.94 41.30
1965 34.55 35.29 35.19 41.17 41.90 47.00 52.55 54.32 46.17 45.45 40.60 30.97 42.10
1966 33.23 32.79 35.16 41.00 43.58 49.30 52.35 52.45 50.20 42.77 40.23 39.39 42.70
1967 38.39 34.61 35.94 36.27 43.65 52.23 53.10 56.68 51.10 44.19 38.03 35.06 43.27
1968 33.65 38.79 38.71 37.73 44.42 49.73 53.58 54.00 49.57 41.71 38.57 31.74 42.68
1969 27.61 32.89 35.10 39.53 46.77 54.10 51.84 50.68 50.27 40.87 38.20 35.81 41.97
1970 34.39 36.57 37.19 37.70 42.94 51.67 51.90 50.77 46.27 41.32 37.50 33.32 41.80
1971 33.39 32.96 34.19 37.50 44.00 47.43 52.97 54.65 46.97 39.90 36.63 32.74 41.11
1972 31.87 35.17 39.29 36.80 45.65 49.87 54.77 54.61 47.30 40.65 39.40 29.32 42.06
1973 30.65 34.64 38.06 40.27 45.52 50.87 53.45 49.35 50.03 42.97 37.63 37.19 42.55
1974 29.06 35.32 37.10 40.13 43.87 50.37 53.58 53.74 51.40 41.13 39.20 36.00 42.58
1975 35.06 32.96 35.84 37.13 45.48 49.33 54.84 52.13 50.53 45.45 37.07 35.71 42.63
1976 34.61 33.38 34.13 38.20 43.29 47.63 52.23 53.23 50.80 41.61 38.23 31.39 41.56
1977 28.00 34.43 35.00 40.10 42.32 49.40 52.35 57.48 49.83 43.48 37.13 37.03 42.21
1978 36.87 39.07 40.10 40.50 44.29 52.47 54.87 54.45 51.53 43.87 31.83 28.68 43.21
1979 23.16 35.43 39.52 42.33 46.16 50.13 54.52 53.45 52.57 47.00 34.97 37.00 43.02
1980 27.97 35.59 37.74 41.60 45.74 48.80 53.42 49.68 49.07 42.42 39.43 35.26 42.23
1981 34.16 35.14 38.13 42.03 46.16 49.30 53.10 55.65 50.27 42.29 39.27 36.10 43.47
1982 33.03 34.25 36.26 36.03 43.16 51.73 52.45 53.90 49.67 43.39 34.23 34.52 41.89
1983 35.84 39.29 41.26 39.70 46.84 50.43 53.45 55.61 48.53 42.68 41.17 30.52 43.78
1984 35.03 37.21 40.39 39.30 44.42 47.73 52.16 53.68 50.10 44.10 38.83 31.32 42.86
1985 27.55 ----- z 35.52 42.30 45.29 49.73 55.90 52.74 48.37 43.29 31.47 26.65 41.71
1986 36.58 37.75 42.77 40.27 46.77 54.30 52.94 56.81 49.90 45.68 40.67 32.90 44.78
1987 33.45 ----- z 40.13 43.33 48.23 52.07 54.26 54.52 51.87 45.03 41.67 34.32 45.35
1988 33.68 35.41 38.06 43.17 45.74 49.83 54.77 53.68 49.97 48.68 42.33 34.20 a 44.13
1989 36.32 28.82 38.90 45.10 46.16 52.70 53.84 54.71 50.67 44.16 41.33 32.71 43.79
1990 37.06 34.11 ----- z 44.00 46.23 52.37 56.71 57.42 54.83 43.48 41.70 28.42 45.12
1991 32.77 40.86 37.52 41.63 45.32 49.30 54.74 55.74 51.77 43.55 41.17 34.97 44.11
1992 37.03 39.07 41.74 44.37 49.45 54.00 56.77 55.00 50.77 47.10 39.87 33.77 45.74
1993 29.58 31.39 40.77 43.47 49.77 51.30 53.35 55.77 49.37 45.74 31.03 33.58 42.93
1994 36.68 34.14 39.52 43.50 47.39 49.17 54.65 54.39 53.73 42.26 34.57 35.94 43.83
1995 36.81 39.00 37.61 40.10 47.35 51.30 56.39 53.03 54.37 44.48 44.77 36.16 45.11
1996 37.06 32.69 39.26 43.67 44.42 48.83 56.35 55.16 48.77 44.65 39.53 35.94 43.86
1997 35.10 35.04 39.55 40.77 50.16 51.03 54.42 56.65 52.20 44.74 41.93 33.65 44.60
1998 38.29 38.57 40.00 41.73 47.29 51.13 56.90 55.71 52.50 44.19 42.10 33.83 a 45.19
1999 35.97 37.71 37.06 39.40 43.48 49.93 52.74 56.23 48.77 43.48 42.70 35.97 a 43.62
2000 33.07 a 36.76 36.71 42.37 46.55 51.17 53.42 52.84 51.43 43.94 33.03 34.48 42.98
2001 33.29 33.71 39.39 40.13 45.42 49.10 a 53.81 55.10 a 51.80 43.60 a 41.93 35.77 43.59
2002 36.16 35.36 35.97 41.93 44.39 52.00 55.32 54.65 51.20 43.29 40.17 37.19 43.97
2003 38.74 35.75 42.10 41.00 46.35 53.50 55.45 56.03 52.90 48.84 36.13 36.77 45.30
2004 34.32 37.14 39.87 42.93 48.74 52.60 56.71 57.58 51.97 47.00 37.97 36.97 45.32
2005 34.58 32.21 39.87 43.27 49.81 50.43 56.32 55.39 49.50 46.97 35.47 33.58 43.95
2006 39.81 32.82 37.19 41.33 ----- z 53.77 56.48 53.84 50.60 41.87 40.60 32.65 43.72
2007 30.61 37.32 40.48 40.23 45.16 50.60 57.29 55.61 50.27 43.87 35.83 34.87 43.51
2008 30.61 35.59 35.42 37.83 47.06 48.23 54.77 56.19 49.97 43.06 41.00 31.58 42.61
2009 32.97 33.11 36.32 39.97 45.10 53.33 57.48 56.03 52.73 44.13 40.03 30.00 43.43
2010 40.39 38.89 38.45 40.00 44.23 49.93 53.65 54.32 53.50 45.97 39.60 38.32 44.77
2011 35.29 33.32 38.45 38.00 43.42 50.23 53.42 55.68 53.50 46.52 36.77 31.26 42.99
2012 33.84 35.48 35.26 42.37 44.94 49.83 54.32 55.42 50.97 45.32 41.60 37.29 43.89
2013 31.03 37.04 38.39 52.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 35.49
Period of Record Statistics
MEAN 33.77 35.44 37.97 40.61 45.54 50.60 54.21 54.45 50.63 44.03 38.64 33.99 43.30
S.D. 3.57 2.55 2.19 2.24 2.02 1.82 1.63 1.88 1.97 1.97 3.06 2.72 1.13
SKEW -0.69 0.03 0.14 -0.14 0.44 0.25 0.33 -0.75 -0.20 0.31 -0.69 -0.53 0.20
MAX 40.39 40.86 42.77 45.10 50.16 54.30 57.48 57.58 54.83 48.84 44.77 39.39 45.74
MIN 23.16 28.82 34.13 36.03 41.84 47.00 51.03 49.35 46.17 39.90 31.03 26.65 41.11
NO YRS 51 49 50 50 49 50 50 50 51 51 51 51 46