SISTERS, OREGON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(357857)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201304
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
1958 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 44.40 u 36.60 28.39 27.37 27.58 29.98
1959 24.45 23.33 a 26.16 26.90 31.00 a 40.53 41.90 38.65 37.59 a 30.90 21.37 20.10 a 30.24
1960 14.42 20.11 b 25.35 29.33 32.94 37.30 43.33 a 39.35 35.53 30.10 24.87 20.94 29.46
1961 25.00 29.96 a 26.62 e 29.83 a 33.71 41.27 41.55 46.28 b 32.22 c 29.03 a 22.07 21.32 c 31.57
1962 15.45 23.57 25.16 29.87 33.84 36.37 39.06 41.06 36.37 29.87 29.33 24.06 30.34
1963 11.81 29.79 22.79 b 29.00 34.77 38.37 38.84 41.45 42.17 32.10 28.76 a 22.35 31.02
1964 24.13 22.52 f 25.03 26.30 30.23 38.50 41.50 c 38.33 a 29.70 28.03 22.54 b 20.71 29.55
1965 24.19 24.68 19.87 a 27.93 27.61 36.97 43.03 44.35 31.03 30.97 29.77 18.68 29.92
1966 23.71 23.14 24.35 26.50 32.48 37.90 40.87 39.87 37.56 c 30.39 28.80 24.68 30.85
1967 27.19 24.64 25.32 26.03 32.32 40.30 41.90 44.39 39.50 33.00 28.30 19.61 31.88
1968 19.68 28.66 27.35 25.20 33.58 41.10 42.48 43.29 35.70 28.84 25.77 22.45 i 31.97
1969 15.68 18.43 22.58 27.53 36.90 44.27 40.81 37.58 ----- z 27.13 24.10 22.29 28.85
1970 22.23 25.29 25.45 27.03 32.42 43.20 44.65 39.77 32.97 26.87 27.60 20.77 30.69
1971 23.87 22.12 b 22.10 27.23 37.03 38.57 43.81 44.87 33.77 27.45 25.60 21.16 30.63
1972 20.00 25.07 29.16 26.60 34.52 40.27 44.32 42.61 ----- z 27.19 27.50 12.94 30.02
1973 17.23 23.61 25.16 27.60 34.42 38.87 40.29 37.71 35.97 29.81 27.13 28.90 30.56
1974 15.19 22.96 26.35 28.90 31.52 41.03 41.39 41.61 32.83 25.10 29.63 22.77 29.94
1975 22.74 19.89 a 22.87 25.73 28.16 f 35.60 45.16 37.55 31.30 33.03 23.70 25.16 29.34
1976 21.58 21.41 24.23 28.50 31.81 33.97 41.10 42.10 36.23 25.84 28.17 16.00 29.24
1977 13.13 25.62 d 25.65 28.00 32.03 41.47 38.35 43.32 32.97 27.24 b 25.17 25.94 29.91
1978 24.84 26.29 28.26 26.77 30.45 40.83 43.48 41.65 35.30 26.48 b 12.44 e 16.41 i 30.62
1979 ----- z 27.55 f 26.77 30.03 ----- z 38.38 d 42.10 42.30 a 38.21 b 34.24 f 24.33 f 26.50 c 34.90
1980 16.00 i ----- z ----- z ----- z ----- z 37.25 j 40.30 a 35.76 b 35.48 e 26.83 g 26.56 l 20.43 j 37.18
1981 23.67 m 20.17 j 24.30 k 28.29 i 31.58 e 37.83 f 36.93 d 39.92 e 33.74 k 27.90 j 24.22 l 23.73 i 36.14
1982 13.00 l 16.53 i 23.55 22.73 28.30 k 40.67 40.90 40.97 36.13 29.97 20.97 20.13 30.67
1983 24.58 30.11 31.74 25.13 30.05 j 35.07 40.74 44.16 32.07 29.45 28.77 14.71 n 32.18
1984 14.95 k 22.15 i 27.29 28.10 31.77 34.50 38.94 39.23 i 31.20 29.45 26.30 17.65 29.47
1985 16.97 18.44 j 24.23 27.97 29.52 36.73 43.52 38.48 31.30 28.61 13.20 6.77 27.03
1986 22.97 25.71 28.55 25.70 32.74 40.17 37.55 41.97 32.63 27.32 29.17 22.27 i 31.32
1987 20.20 k 20.06 j 27.36 i 31.65 j ----- z 38.12 e 41.10 37.61 33.27 25.29 j 23.71 m 21.05 k 37.52
1988 19.35 22.27 c 24.65 30.50 32.21 l 38.67 i 41.90 k 37.17 h 33.62 i 30.85 k 28.47 19.65 24.15
1989 21.97 9.71 28.00 32.03 33.74 37.63 39.16 40.06 33.50 28.90 25.73 17.06 28.96
1990 26.39 18.39 25.26 31.40 32.45 39.70 43.81 44.06 36.70 29.42 25.93 10.55 30.34
1991 17.42 26.00 25.19 28.70 32.74 37.80 42.55 44.90 35.20 27.97 30.07 24.03 31.05
1992 25.52 28.66 26.32 33.37 35.97 ----- z 41.42 40.55 36.73 30.26 25.53 16.84 31.01
1993 9.39 12.79 27.97 29.90 38.94 39.33 38.32 39.77 33.80 30.90 13.50 22.74 28.11
1994 23.29 20.00 25.35 31.53 35.55 36.53 41.90 39.03 36.10 26.58 20.57 20.00 29.70
1995 24.39 24.21 24.90 27.40 33.61 38.50 43.74 37.81 37.90 29.19 30.80 23.34 b 31.32
1996 23.97 21.48 26.26 31.37 32.81 36.50 43.90 42.39 34.03 30.58 27.17 23.33 a 31.15
1997 20.58 24.71 27.55 28.60 36.74 39.20 44.74 46.26 40.57 32.00 29.63 19.23 32.48
1998 23.81 27.43 28.19 28.53 36.94 40.60 48.45 43.48 39.07 27.35 30.03 20.84 32.89
1999 25.10 26.07 26.23 27.17 32.81 38.31 a 41.48 46.68 32.37 29.71 30.87 25.10 31.82
2000 21.16 25.24 22.65 29.47 30.94 36.21 a 38.84 38.81 35.10 29.03 19.63 17.48 28.71
2001 17.61 16.18 29.19 28.07 a 34.57 a 36.36 b 41.53 a 44.26 37.35 d 30.06 29.34 a 27.35 30.99
2002 18.00 p 22.18 23.84 26.90 31.68 41.83 45.68 39.45 34.37 22.48 20.67 i 28.03 31.64
2003 29.87 22.18 30.81 30.10 34.89 d 40.53 46.97 45.42 39.53 34.77 24.17 a 25.14 j 34.48
2004 21.00 b 23.84 d 30.25 g 29.10 34.72 m 42.07 46.90 47.81 38.24 a 32.16 25.17 26.39 33.27
2005 22.97 21.39 28.00 32.20 40.71 38.53 45.00 42.32 33.57 30.10 26.17 16.68 31.47
2006 27.03 26.38 l 25.00 a 30.73 36.94 41.47 45.13 41.16 36.20 26.87 30.40 19.23 32.74
2007 17.68 25.79 28.65 28.23 35.45 40.50 49.39 42.35 35.50 30.81 25.63 23.84 31.98
2008 17.55 25.34 25.16 25.63 39.55 36.50 43.81 46.26 35.13 31.48 29.38 a 15.65 30.95
2009 20.39 22.07 24.10 27.13 35.33 a 42.17 45.77 44.35 37.27 28.26 27.03 16.13 30.83
2010 28.84 25.57 e 25.10 28.36 e 36.45 39.13 45.89 m 41.68 39.10 31.58 26.37 23.90 31.46
2011 22.36 c 18.89 29.10 27.57 b 32.39 40.37 42.29 43.32 39.93 31.90 24.07 15.23 30.62
2012 23.48 24.38 26.16 32.17 35.39 38.90 j 44.63 a 42.42 34.96 b 29.65 29.29 b 23.74 31.48
2013 17.13 21.73 b 26.48 b 31.50 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 15.00 z 21.78
Period of Record Statistics
MEAN 21.23 23.28 25.92 28.37 33.82 38.98 42.41 41.76 35.45 29.29 25.87 20.92 30.63
S.D. 4.47 4.06 2.27 2.14 2.66 2.30 2.72 2.82 2.76 2.25 4.31 4.59 1.08
SKEW -0.54 -1.01 0.10 0.13 0.38 -0.08 0.27 0.05 0.14 -0.29 -1.56 -0.69 -0.20
MAX 29.87 30.11 31.74 33.37 40.71 44.27 49.39 47.81 42.17 34.77 30.87 28.90 32.89
MIN 9.39 9.71 19.87 22.73 27.61 33.97 36.93 35.76 29.70 22.48 12.44 6.77 28.11
NO YRS 48 46 51 51 46 49 52 52 51 50 50 47 31