ST HELENS RFD, OREGON

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(357466)

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
1976 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 44.00 b 43.00 32.00 24.00 24.00 24.00
1977 14.00 b 29.00 29.00 29.00 36.00 40.00 44.00 49.00 44.00 38.00 25.00 29.00 14.00
1978 24.00 ----- z 31.00 33.00 34.00 a 47.00 47.00 48.00 42.00 31.00 19.00 12.00 12.00
1979 12.00 10.00 32.00 28.00 38.00 40.00 46.00 42.00 ----- z ----- z 27.00 30.00 10.00
1980 9.00 26.00 a 31.00 c 32.00 b 36.00 a 40.00 a 50.00 g 42.00 b 45.00 a 33.00 c 28.00 23.00 d 9.00
1981 28.00 d 26.00 h 28.00 d 30.00 a 40.00 a 45.00 c 44.00 e 48.00 b 43.00 34.00 26.00 c 29.00 c 26.00
1982 11.00 18.00 23.00 31.00 35.00 45.00 46.00 45.00 39.00 31.00 22.00 5.00 d 5.00
1983 28.00 h 27.00 33.00 32.00 38.00 44.00 42.00 45.00 41.00 35.00 29.00 c 14.00 a 14.00
1984 20.00 31.00 32.00 31.00 37.00 35.00 44.00 45.00 39.00 32.00 29.00 16.00 16.00
1985 21.00 12.00 29.00 32.00 33.00 a 43.00 50.00 47.00 36.00 31.00 10.00 e 18.00 10.00
1986 29.00 26.00 33.00 30.00 33.00 46.00 48.00 49.00 ----- z 35.00 29.00 25.00 25.00
1987 22.00 29.00 31.00 36.00 40.00 43.00 50.00 49.00 42.00 35.00 27.00 22.00 22.00
1988 20.00 20.00 30.00 35.00 28.00 43.00 50.00 50.00 40.00 33.00 30.00 24.00 20.00
1989 27.00 4.00 24.00 33.00 35.00 46.00 48.00 48.00 42.00 32.00 30.00 28.00 4.00
1990 26.00 19.00 28.00 36.00 35.00 46.00 50.00 50.00 51.00 37.00 31.00 1.00 1.00
1991 20.00 32.00 31.00 33.00 32.00 39.00 49.00 47.00 44.00 26.00 34.00 23.00 20.00
1992 30.00 30.00 k 36.00 35.00 38.00 44.00 50.00 50.00 38.00 b 32.00 31.00 26.00 26.00
1993 13.00 a 20.00 30.00 36.00 38.00 46.00 45.00 46.00 42.00 38.00 15.00 22.00 13.00
1994 29.00 i 18.00 30.00 35.00 39.00 41.00 48.00 50.00 48.00 36.00 22.00 22.00 18.00
1995 25.00 14.00 27.00 33.00 38.00 42.00 47.00 47.00 44.00 29.00 29.00 24.00 a 14.00
1996 14.00 13.00 25.00 29.00 36.00 45.00 45.00 48.00 41.00 30.00 25.00 25.00 13.00
1997 18.00 29.00 28.00 30.00 36.00 41.00 48.00 50.00 46.00 35.00 a 29.00 25.00 18.00
1998 21.00 30.00 31.00 32.00 38.00 44.00 49.00 45.00 44.00 35.00 31.00 14.00 14.00
1999 27.00 c 22.00 a 28.00 c 29.00 28.00 b 37.00 b 44.00 d 45.00 e 46.00 i 34.00 e 34.00 d 23.00 22.00
2000 21.00 a 26.00 c 24.00 b 31.00 b 29.00 d 44.00 44.00 46.00 d 38.00 c 35.00 g 22.00 a 22.00 a 21.00
2001 24.00 a 22.00 b 26.00 a 28.00 c 38.00 i 40.00 b 48.00 d 50.00 b 42.00 h 33.00 f 30.00 g 26.00 g 22.00
2002 28.00 k 26.00 h 26.00 o 20.00 31.00 37.00 c 43.00 44.00 39.00 j 23.00 23.00 26.00 20.00
2003 26.00 14.00 18.00 g 32.00 28.00 44.00 42.00 46.00 c 38.00 e 31.00 c 19.00 p 20.00 d 14.00
2004 15.00 l 25.00 n 31.00 d 30.00 21.00 d 35.00 e 38.00 g 49.00 35.00 k 20.00 e 25.00 j 17.00 h 15.00
2005 ----- z 14.00 c 32.00 21.00 g 37.00 34.00 g 48.00 30.00 f 34.00 l 36.00 k 27.00 18.00 14.00
2006 31.00 f 18.00 e 28.00 33.00 ----- z 47.00 k 46.00 44.00 40.00 29.00 g 25.00 b 25.00 18.00
2007 17.00 a 23.00 27.00 29.00 f 36.00 41.00 49.00 48.00 37.00 a 31.00 27.00 29.00 17.00
2008 20.00 27.00 24.00 28.00 32.00 d 41.00 d 46.00 g 41.00 41.00 36.00 w 31.00 d 13.00 13.00
2009 22.00 25.00 27.00 a 25.00 34.00 a 44.00 ----- z ----- z ----- z ----- z ----- z ----- z 22.00
2010 ----- z ----- z ----- z ----- z ----- z 40.00 e 46.00 e 46.00 e 43.00 38.00 11.00 20.00 11.00
2011 20.00 14.00 c 28.00 29.00 a 34.00 c 41.00 b 44.00 b 47.00 f 41.00 f 29.00 c 28.00 b 20.00 e 14.00
2012 26.00 d 28.00 e 27.00 d 29.00 d 31.00 e 41.00 i 52.00 h 43.00 i 44.00 k 38.00 g 29.00 b 24.00 d 24.00
2013 20.00 e 29.00 f 29.00 e 44.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 20.00
Period of Record Statistics
MEAN 20.90 21.33 28.91 31.06 34.36 42.09 46.58 46.76 41.89 32.28 26.03 21.21 13.38
S.D. 5.55 7.17 2.98 3.33 4.18 3.19 2.51 2.56 3.39 4.18 5.70 6.59 6.47
SKEW -0.40 -0.44 -0.05 -0.96 -1.14 -0.57 -0.19 -0.45 0.57 -1.07 -1.31 -1.27 -0.63
MAX 30.00 32.00 36.00 36.00 40.00 47.00 50.00 50.00 51.00 38.00 34.00 30.00 22.00
MIN 9.00 4.00 23.00 20.00 21.00 35.00 42.00 41.00 36.00 20.00 10.00 1.00 1.00
NO YRS 30 30 34 33 33 33 31 33 27 29 33 34 13