N WILLAMETTE EXP STN, OREGON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(356151)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200708
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
1963 26.10 a 37.61 35.16 ----- z 44.19 49.23 51.58 52.39 52.13 43.00 39.28 a 31.52 42.02
1964 34.74 31.48 35.13 37.27 41.65 48.97 52.32 49.61 45.68 b 41.39 35.33 32.84 40.53
1965 34.77 34.63 a 35.19 40.27 41.58 45.57 52.13 53.29 45.60 43.23 40.97 32.97 41.68
1966 33.65 32.89 36.29 40.27 41.84 48.43 51.45 50.29 49.60 40.90 39.83 38.61 42.00
1967 37.81 32.54 35.03 35.30 42.61 50.57 51.26 52.68 48.43 42.00 36.70 34.39 41.61
1968 32.87 37.83 37.26 36.47 44.77 47.57 51.32 53.58 48.41 a 40.80 a 37.60 33.85 e 41.86
1969 26.71 31.40 c 33.84 39.37 46.62 b 54.76 a 50.47 a 48.57 c 49.66 a 40.45 36.86 b 35.17 a 41.16
1970 34.60 a 34.00 34.83 a 36.93 42.32 50.87 51.16 48.19 43.60 37.68 37.10 32.94 40.35
1971 33.32 32.89 33.67 a 37.23 42.58 47.63 52.52 53.90 b 45.57 38.61 35.97 32.39 40.52
1972 31.68 34.21 38.61 36.03 44.48 49.13 53.52 53.48 45.87 38.97 38.03 29.55 41.13
1973 31.55 34.29 36.96 d 38.70 44.61 49.40 52.00 48.19 49.73 42.32 38.10 37.84 41.97
1974 28.61 c 34.96 36.45 40.80 43.19 49.17 52.42 52.23 50.63 37.77 38.13 36.45 41.74
1975 36.19 33.71 35.10 a 36.60 43.00 48.53 53.94 51.16 48.80 44.19 36.63 35.90 41.98
1976 34.23 32.39 a 34.68 38.40 43.68 46.43 51.65 52.55 50.28 a 40.07 b 35.47 30.52 40.86
1977 27.29 33.57 34.23 39.07 42.29 48.77 51.19 55.52 48.67 42.39 36.61 b 38.13 41.48
1978 36.23 a 39.00 38.26 40.53 43.52 52.25 b 54.40 a 54.71 49.93 40.81 30.30 26.21 c 42.18
1979 23.68 34.54 37.48 42.23 45.13 48.70 53.29 53.55 50.93 45.65 36.07 a 36.77 42.33
1980 28.84 35.55 36.23 40.80 45.00 49.00 53.35 50.10 48.23 41.16 39.43 34.90 41.88
1981 33.35 34.86 37.00 41.44 c 45.55 49.20 52.80 a 53.52 47.60 41.13 39.52 a 35.58 42.63
1982 32.48 33.43 35.71 36.10 43.48 51.90 52.61 53.23 51.17 41.90 34.50 34.81 41.78
1983 36.97 39.43 41.32 39.70 46.58 50.57 54.48 54.42 47.27 40.90 42.13 30.52 43.69
1984 35.26 35.03 40.61 39.87 43.16 48.57 51.16 51.87 49.40 41.71 37.43 30.65 42.06
1985 26.48 30.75 32.77 41.80 44.52 49.07 53.68 51.97 47.07 40.74 31.24 a 25.39 39.62
1986 35.03 37.29 41.06 39.17 45.71 52.93 51.97 53.81 47.53 42.94 40.07 31.74 43.27
1987 31.55 36.07 38.45 41.53 47.97 51.03 54.16 52.45 48.73 40.29 39.30 33.48 42.92
1988 32.55 34.14 36.55 42.30 44.55 49.60 52.00 50.39 46.67 46.39 40.40 33.32 42.40
1989 35.29 27.21 37.23 43.47 45.26 52.13 52.29 52.13 48.87 42.16 39.13 32.61 42.32
1990 35.87 34.79 38.26 41.70 44.55 51.37 53.90 54.68 52.43 40.77 39.07 26.58 42.83
1991 31.29 39.39 35.81 39.80 43.94 ----- z 52.97 53.87 49.17 40.52 40.13 35.52 42.04
1992 36.58 38.66 38.87 43.33 45.84 51.73 55.13 52.90 47.43 43.55 38.63 33.06 43.81
1993 28.94 30.46 39.74 42.23 48.42 50.27 53.00 54.71 46.70 43.61 29.90 32.68 41.72
1994 37.42 32.18 38.45 41.77 47.23 48.67 52.68 52.55 49.87 39.26 33.83 35.71 42.47
1995 37.84 36.43 37.26 38.90 45.97 51.30 55.26 51.81 53.20 43.35 43.87 35.45 44.22
1996 36.13 32.76 37.00 42.14 a 44.23 48.20 54.58 52.55 46.63 42.68 37.33 35.45 42.47
1997 34.32 34.25 37.81 39.43 48.55 50.13 53.35 56.26 51.97 43.55 39.90 32.55 43.51
1998 37.74 37.64 37.81 39.50 47.90 50.93 57.10 53.71 50.10 42.97 42.73 12.21 g 45.29
1999 42.30 d 38.32 38.58 40.27 43.68 50.23 52.32 56.00 47.43 42.61 43.63 37.74 44.43
2000 35.58 37.52 36.45 42.37 47.81 51.37 54.61 52.48 ----- z 44.45 34.57 34.90 42.92
2001 34.45 33.96 38.81 31.47 45.26 48.80 54.23 54.90 51.10 42.94 ----- z ----- z 43.59
2002 ----- z ----- z 37.26 42.33 44.68 51.17 54.94 52.84 50.23 ----- z 38.60 37.13 45.46
2003 39.06 36.43 41.52 42.50 46.77 52.83 54.55 54.52 51.57 47.94 37.20 35.90 45.07
2004 34.74 37.72 39.77 41.53 48.29 52.47 56.71 58.61 51.37 46.06 38.47 37.52 45.27
2005 35.71 33.46 38.32 42.20 50.39 51.47 55.97 54.58 47.67 47.71 35.03 34.97 43.96
2006 40.06 34.61 37.55 42.13 47.23 54.27 56.55 52.58 50.00 41.97 41.17 34.10 44.35
2007 31.58 38.14 41.16 41.17 45.03 50.80 57.58 55.16 ----- z ----- z ----- z ----- z 45.08
Period of Record Statistics
MEAN 33.67 34.83 37.23 39.92 45.01 50.14 53.35 52.94 48.91 42.17 37.82 33.77 42.37
S.D. 3.94 2.67 2.14 2.51 2.09 1.92 1.74 2.11 2.14 2.33 3.11 3.10 1.32
SKEW -0.51 -0.26 0.15 -1.09 0.42 0.15 0.60 -0.22 -0.18 0.47 -0.51 -0.89 0.33
MAX 42.30 39.43 41.52 43.47 50.39 54.76 57.58 58.61 53.20 47.94 43.87 38.61 45.27
MIN 23.68 27.21 32.77 31.47 41.58 45.57 50.47 48.19 43.60 37.68 29.90 25.39 39.62
NO YRS 44 44 45 44 45 44 45 45 43 43 43 42 38