SISTERS, OREGON

Monthly Average 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 65.05 u 54.38 47.76 38.87 37.95 44.74
1959 33.68 32.83 a 38.63 43.70 45.78 a 56.73 63.74 58.90 a 53.02 a 47.45 38.37 31.38 a 45.35
1960 26.00 31.28 b 38.74 43.32 46.90 57.30 65.95 a 59.06 56.00 47.45 35.40 31.11 44.88
1961 34.48 39.35 a 38.28 f 43.64 a 48.15 60.83 63.26 66.19 b 50.56 c 45.62 a 34.23 31.50 c 47.07
1962 28.66 33.36 36.61 46.32 46.15 55.08 60.63 59.35 56.88 46.03 40.05 35.29 45.37
1963 27.29 41.39 36.72 b 40.23 50.16 54.45 58.03 61.55 60.88 47.66 38.97 a 32.32 45.81
1964 33.23 36.24 f 36.76 40.45 46.76 54.40 61.38 c 58.47 a 51.45 46.55 33.95 b 29.90 44.84
1965 32.87 37.61 36.43 a 43.57 46.03 55.03 62.66 61.26 50.33 50.39 39.60 30.23 45.50
1966 33.40 33.77 38.79 43.77 50.92 54.38 60.08 60.89 57.20 c 47.95 39.30 34.06 46.21
1967 36.18 37.86 36.42 37.80 49.61 57.60 63.95 67.21 60.45 48.44 38.60 29.92 47.00
1968 31.34 37.97 41.32 41.13 49.00 58.00 64.45 59.94 55.60 45.29 36.68 31.82 i 47.34
1969 25.35 29.48 37.94 42.78 54.05 59.75 61.06 59.40 ----- z 42.82 38.10 32.08 43.89
1970 32.05 36.36 38.29 39.47 50.13 60.78 64.95 62.77 51.58 44.00 37.17 30.37 45.66
1971 34.52 34.54 b 34.47 41.83 51.05 53.93 64.68 66.16 51.52 43.94 38.00 30.52 45.43
1972 30.23 35.93 42.44 40.05 52.18 58.25 64.47 63.50 ----- z 44.24 38.17 23.92 44.85
1973 27.27 34.45 38.27 43.93 52.35 57.52 63.69 60.31 55.52 46.45 35.57 36.35 45.97
1974 25.27 34.71 38.16 42.75 47.32 61.50 61.74 62.50 56.98 45.63 40.40 32.90 45.82
1975 33.10 31.72 a 34.73 38.72 47.79 g 53.83 65.18 58.39 54.93 46.27 34.73 34.77 44.22
1976 33.37 33.66 37.66 41.75 50.87 53.00 63.76 59.21 56.18 46.34 39.65 30.68 45.51
1977 26.85 38.69 d 38.13 46.53 46.02 61.35 61.42 67.42 52.30 45.66 b 36.35 33.63 46.20
1978 32.58 a 35.39 41.84 38.77 47.08 58.52 63.58 60.47 53.42 47.60 b 26.58 e 28.32 i 45.98
1979 ----- z 33.93 f 39.00 41.83 ----- z 57.29 d 63.48 60.52 a 58.05 b 52.61 i 32.88 f 35.54 c 50.82
1980 25.25 i ----- z ----- z ----- z ----- z 54.08 k 62.73 a 59.09 b 56.91 g 47.00 k 39.47 n 35.26 n 60.91
1981 32.50 m 33.34 l 39.69 m 45.36 l 49.21 e 56.27 f 59.10 g 64.84 f 52.63 k 43.90 j 37.72 l 32.88 j 49.21
1982 26.18 l 29.25 j 37.06 38.87 46.82 l 57.53 60.84 62.19 53.12 44.11 32.70 29.31 46.19
1983 35.10 37.61 41.68 40.96 b 50.56 m 52.58 58.89 64.92 51.75 47.89 37.95 24.43 q 46.93
1984 25.83 k 30.10 i 36.90 37.48 45.92 49.05 a 63.52 62.57 i 52.50 42.98 35.43 27.89 43.52
1985 27.19 31.19 j 37.69 46.05 49.08 58.12 67.69 60.24 49.67 44.41 b 26.53 20.23 44.26
1986 32.53 a 35.48 42.95 41.71 a 49.98 61.77 58.87 66.05 50.50 46.94 39.14 a 28.73 i 47.81
1987 29.35 k 32.92 j 40.73 i 51.15 j ----- z 59.32 e 59.95 60.73 57.50 49.12 j 37.22 n 29.80 k 59.37
1988 27.93 b 35.71 c 38.77 46.20 48.79 l 56.29 i 63.62 k 62.17 h 54.88 i 52.40 k 37.67 30.94 36.20
1989 31.87 22.41 38.74 47.48 49.37 57.78 60.81 59.84 54.90 45.79 38.77 31.71 44.96
1990 34.24 31.39 39.60 48.68 48.50 57.13 65.44 63.97 59.05 45.89 38.83 22.68 46.28
1991 29.34 39.41 36.65 42.50 47.23 54.10 64.48 65.98 57.90 47.06 38.77 32.43 a 46.32
1992 34.35 38.48 42.11 47.20 55.23 ----- z 61.81 63.92 56.07 48.24 35.98 26.23 46.33
1993 19.89 23.93 39.05 42.93 54.40 54.78 56.58 59.69 56.42 48.21 29.07 31.52 43.04
1994 35.23 32.30 40.84 46.62 52.50 55.90 65.98 61.97 58.05 44.32 30.88 31.21 46.32
1995 31.66 37.71 37.19 41.83 50.23 54.83 62.60 58.98 58.65 45.27 41.75 30.26 b 45.91
1996 32.55 32.43 39.16 45.32 47.71 56.03 66.13 64.45 53.57 46.00 38.27 31.78 a 46.12
1997 30.63 33.21 39.98 41.87 54.11 56.12 63.65 64.94 56.98 45.92 38.50 30.32 46.35
1998 33.13 35.93 40.69 42.67 48.87 57.22 68.82 65.94 60.35 44.74 38.43 30.58 47.28
1999 35.02 34.32 37.02 40.90 48.02 55.52 a 62.89 65.10 54.05 47.77 41.95 34.06 46.38
2000 29.45 33.72 35.90 45.48 45.50 55.12 a 61.66 62.98 55.18 44.50 28.95 27.31 43.81
2001 27.15 28.11 41.37 41.09 a 54.60 a 53.39 b 62.00 a 65.31 58.21 d 45.94 38.74 a 32.53 45.70
2002 27.93 p 34.79 36.71 43.98 48.35 59.33 66.73 60.45 55.45 41.85 36.95 j 34.50 48.21
2003 37.39 33.04 41.10 41.70 49.83 d 60.12 69.31 65.19 59.43 50.66 32.98 b 31.81 j 49.16
2004 29.02 b 33.46 d 43.52 g 46.08 50.12 n 59.15 66.65 65.47 54.22 a 46.58 37.00 34.55 47.22
2005 31.61 33.27 41.31 43.10 51.85 54.13 66.15 63.95 52.68 45.55 33.88 25.87 45.28
2006 34.71 37.44 l 35.43 a 44.18 52.23 59.25 66.37 62.34 56.47 44.37 38.80 29.69 47.62
2007 28.00 35.48 43.00 42.17 52.94 57.73 68.10 62.71 53.83 44.10 36.72 30.79 46.30
2008 27.15 35.43 36.31 38.78 52.35 54.83 65.34 64.73 55.60 46.97 40.74 a 25.90 45.34
2009 31.76 32.43 34.35 42.50 51.50 a 58.50 67.13 64.60 57.85 42.13 37.28 25.19 45.44
2010 35.50 34.39 e 38.32 41.28 e 47.69 54.45 65.47 m 61.65 55.58 46.21 36.00 31.47 43.87
2011 34.32 c 30.11 38.16 38.86 b 45.90 55.25 61.11 64.65 60.32 46.81 35.80 29.92 45.10
2012 34.15 34.16 36.94 45.42 50.26 53.28 j 64.40 b 64.79 56.43 b 45.61 39.12 b 31.23 45.68
2013 28.31 33.92 b 39.07 b 47.75 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 17.00 z 33.77
Period of Record Statistics
MEAN 31.19 34.20 38.51 42.67 49.65 56.71 63.50 62.55 55.39 46.01 36.71 30.73 45.69
S.D. 3.60 3.61 2.23 2.70 2.70 2.67 2.79 2.64 2.91 1.85 3.51 3.52 0.84
SKEW -0.73 -1.01 0.29 0.14 0.28 -0.15 -0.15 0.05 -0.07 0.06 -1.31 -0.76 -1.12
MAX 37.39 41.39 43.00 48.68 55.23 61.77 69.31 67.42 60.88 50.66 41.95 37.95 47.28
MIN 19.89 22.41 34.35 37.48 45.50 49.05 56.58 58.39 49.67 41.85 26.53 20.23 43.04
NO YRS 48 46 50 51 46 49 51 51 50 50 50 47 30