N WILLAMETTE EXP STN,

Monthly Extreme 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 13.00 a 22.00 26.00 ----- z 33.00 40.00 44.00 45.00 44.00 30.00 25.00 a 23.00 13.00
1964 29.00 24.00 28.00 26.00 29.00 40.00 42.00 43.00 39.00 b 31.00 23.00 8.00 8.00
1965 27.00 28.00 a 27.00 27.00 32.00 36.00 44.00 37.00 33.00 34.00 26.00 22.00 22.00
1966 24.00 24.00 28.00 33.00 33.00 34.00 44.00 44.00 43.00 28.00 29.00 30.00 24.00
1967 29.00 26.00 26.00 28.00 35.00 40.00 45.00 44.00 38.00 33.00 28.00 21.00 21.00
1968 21.00 23.00 26.00 26.00 37.00 39.00 43.00 45.00 42.00 a 32.00 a 24.00 23.00 e 21.00
1969 11.00 26.00 c 25.00 31.00 33.00 b 49.00 a 41.00 a 39.00 c 38.00 a 31.00 23.00 b 20.00 a 11.00
1970 25.00 a 29.00 28.00 a 29.00 35.00 42.00 41.00 41.00 32.00 28.00 22.00 24.00 22.00
1971 21.00 24.00 20.00 a 31.00 33.00 40.00 42.00 47.00 b 35.00 25.00 25.00 22.00 20.00
1972 16.00 20.00 26.00 29.00 34.00 40.00 44.00 47.00 30.00 30.00 27.00 5.00 5.00
1973 22.00 27.00 29.00 d 29.00 35.00 36.00 43.00 38.00 36.00 33.00 27.00 28.00 22.00
1974 8.00 c 26.00 23.00 36.00 34.00 42.00 46.00 45.00 38.00 30.00 29.00 28.00 8.00
1975 21.00 25.00 26.00 a 27.00 32.00 38.00 45.00 44.00 39.00 33.00 28.00 25.00 21.00
1976 25.00 24.00 a 25.00 31.00 34.00 35.00 44.00 46.00 44.00 a 30.00 b 21.00 22.00 21.00
1977 14.00 24.00 26.00 28.00 32.00 39.00 45.00 49.00 40.00 36.00 26.00 b 25.00 14.00
1978 26.00 a 28.00 29.00 29.00 31.00 45.00 b 46.00 a 47.00 39.00 29.00 19.00 13.00 c 13.00
1979 11.00 11.00 31.00 35.00 35.00 38.00 44.00 41.00 40.00 38.00 27.00 a 25.00 11.00
1980 11.00 26.00 29.00 29.00 35.00 41.00 48.00 43.00 41.00 32.00 26.00 22.00 11.00
1981 26.00 26.00 27.00 33.00 c 34.00 40.00 45.00 a 44.00 37.00 32.00 28.00 a 29.00 26.00
1982 14.00 17.00 29.00 30.00 34.00 43.00 43.00 44.00 38.00 31.00 25.00 22.00 14.00
1983 25.00 27.00 32.00 30.00 39.00 43.00 48.00 45.00 37.00 32.00 30.00 6.00 6.00
1984 20.00 28.00 30.00 29.00 35.00 40.00 44.00 44.00 37.00 33.00 29.00 15.00 15.00
1985 21.00 11.00 27.00 33.00 29.00 39.00 48.00 42.00 37.00 29.00 14.00 a 18.00 11.00
1986 29.00 25.00 32.00 29.00 33.00 44.00 42.00 45.00 37.00 34.00 30.00 25.00 25.00
1987 20.00 26.00 29.00 33.00 37.00 43.00 48.00 43.00 41.00 33.00 26.00 20.00 20.00
1988 22.00 20.00 27.00 29.00 35.00 39.00 43.00 44.00 36.00 33.00 32.00 20.00 20.00
1989 25.00 8.00 22.00 29.00 36.00 44.00 47.00 42.00 38.00 31.00 28.00 26.00 8.00
1990 25.00 20.00 27.00 32.00 33.00 46.00 48.00 45.00 47.00 31.00 30.00 0.00 0.00
1991 19.00 31.00 30.00 30.00 35.00 ----- z 46.00 44.00 41.00 32.00 27.00 27.00 19.00
1992 25.00 28.00 31.00 32.00 35.00 45.00 51.00 46.00 39.00 32.00 26.00 20.00 20.00
1993 15.00 21.00 29.00 35.00 39.00 43.00 45.00 43.00 37.00 36.00 17.00 23.00 15.00
1994 26.00 21.00 30.00 34.00 38.00 42.00 46.00 48.00 42.00 31.00 25.00 25.00 21.00
1995 27.00 18.00 26.00 31.00 38.00 41.00 46.00 46.00 42.00 29.00 27.00 23.00 18.00
1996 18.00 16.00 26.00 34.00 a 31.00 41.00 44.00 47.00 40.00 33.00 27.00 25.00 16.00
1997 19.00 27.00 30.00 28.00 38.00 46.00 47.00 52.00 44.00 32.00 31.00 27.00 19.00
1998 23.00 29.00 27.00 32.00 43.00 47.00 53.00 48.00 44.00 34.00 35.00 -15.00 g -15.00
1999 34.00 d 32.00 31.00 32.00 38.00 40.00 47.00 49.00 36.00 33.00 35.00 25.00 25.00
2000 28.00 30.00 30.00 32.00 37.00 44.00 47.00 44.00 ----- z 36.00 23.00 27.00 23.00
2001 26.00 24.00 31.00 19.00 37.00 41.00 48.00 49.00 41.00 33.00 ----- z ----- z 19.00
2002 ----- z ----- z 27.00 33.00 34.00 41.00 45.00 47.00 42.00 ----- z 22.00 27.00 22.00
2003 27.00 27.00 30.00 34.00 34.00 45.00 46.00 47.00 43.00 33.00 24.00 25.00 24.00
2004 20.00 28.00 32.00 34.00 41.00 43.00 49.00 55.00 43.00 35.00 27.00 30.00 20.00
2005 22.00 27.00 30.00 34.00 41.00 44.00 49.00 47.00 36.00 38.00 28.00 20.00 20.00
2006 34.00 20.00 28.00 33.00 33.00 46.00 48.00 47.00 42.00 29.00 28.00 25.00 20.00
2007 20.00 25.00 30.00 30.00 36.00 43.00 50.00 47.00 ----- z ----- z ----- z ----- z 20.00
Period of Record Statistics
MEAN 21.91 23.84 27.96 30.64 35.00 41.52 45.64 45.09 39.26 32.05 26.26 21.81 16.94
S.D. 6.05 5.24 2.63 3.12 2.97 3.24 2.64 3.29 3.52 2.63 4.07 6.71 6.52
SKEW -0.35 -1.23 -0.72 -1.06 0.45 -0.11 0.44 0.16 -0.30 0.04 -0.56 -1.63 -0.79
MAX 34.00 32.00 32.00 36.00 43.00 49.00 53.00 55.00 47.00 38.00 35.00 30.00 26.00
MIN 8.00 8.00 20.00 19.00 29.00 34.00 41.00 37.00 30.00 25.00 14.00 0.00 0.00
NO YRS 44 44 45 44 45 44 45 45 43 43 43 42 35