ST HELENS RFD, OREGON

Monthly Average 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 54.62 b 52.03 43.48 39.00 33.87 44.60
1977 27.66 b 36.89 36.52 40.17 44.03 50.70 52.35 58.00 51.37 43.45 38.00 37.87 43.08
1978 37.06 ----- z 40.55 42.33 44.70 a 53.50 55.90 56.39 51.87 43.52 32.70 30.55 44.46
1979 25.58 35.14 39.19 41.50 47.61 50.13 55.39 55.29 ----- z ----- z 37.57 38.68 42.61
1980 28.58 34.46 a 36.57 c 41.36 b 44.93 a 48.72 a 55.17 g 51.79 b 50.14 a 43.39 c 41.60 37.15 d 41.70
1981 35.41 d 35.35 h 38.96 d 42.00 a 46.30 a 51.22 c 53.23 e 57.00 b 51.00 42.10 40.15 c 36.11 c 44.86
1982 33.48 35.93 34.77 36.93 45.10 53.17 52.65 54.32 50.77 45.45 35.50 35.07 d 42.76
1983 36.78 h 38.82 42.74 39.67 48.03 51.87 54.55 56.16 48.07 42.32 42.56 c 30.80 a 45.05
1984 33.35 37.38 41.65 40.43 43.84 48.70 54.16 52.52 50.27 43.81 38.87 31.94 43.08
1985 28.35 33.18 36.84 43.70 46.07 a 52.33 56.94 54.10 48.97 42.26 30.64 e 26.68 41.67
1986 36.74 38.04 43.61 40.33 46.32 53.77 53.65 57.35 ----- z 45.68 39.70 33.65 44.44
1987 32.16 38.75 40.42 43.33 48.71 52.90 55.71 56.87 52.27 45.97 41.27 33.87 45.19
1988 33.42 36.55 38.29 43.93 45.61 52.07 56.16 56.10 50.50 51.45 40.77 35.26 45.01
1989 36.77 28.14 37.58 43.63 47.32 53.93 55.35 55.48 52.30 45.81 42.20 35.52 44.50
1990 37.48 33.79 40.81 45.53 46.61 52.83 58.42 58.94 56.63 44.84 39.87 28.71 45.37
1991 31.35 38.54 36.06 41.27 46.06 51.30 56.90 56.58 54.43 43.87 42.10 35.94 44.53
1992 37.97 38.06 k 41.74 45.77 49.16 54.43 58.03 56.71 49.79 b 47.23 39.63 33.97 46.77
1993 31.00 a 31.46 39.26 43.63 51.26 52.20 54.32 56.81 51.80 46.65 32.13 33.61 43.68
1994 38.27 i 30.21 39.68 43.40 48.39 50.43 54.94 54.90 54.33 41.48 33.87 35.94 44.32
1995 35.81 38.50 36.65 39.30 47.42 50.87 56.77 52.77 55.87 44.16 42.20 34.93 a 44.60
1996 34.52 32.03 37.19 43.00 46.00 51.20 57.97 55.84 50.87 43.97 38.70 36.84 44.01
1997 34.23 35.71 38.06 39.67 48.71 50.40 54.90 57.26 52.70 43.90 a 39.20 33.42 44.01
1998 36.13 38.86 40.81 40.63 45.97 51.43 57.68 55.39 52.37 44.87 40.60 33.45 44.85
1999 36.29 c 36.15 a 36.79 c 39.03 39.90 b 48.32 b 52.74 d 58.58 e 52.10 i 41.08 e 38.38 d 33.61 41.90
2000 30.27 a 33.35 c 34.34 b 40.46 b 43.59 d 51.53 52.52 55.44 d 52.78 c 43.29 g 35.07 a 31.40 a 41.89
2001 33.60 a 30.88 b 36.20 a 38.30 c 44.45 i 48.61 b 52.56 d 54.76 b 50.45 h 43.96 f 38.35 g 35.00 g 42.13
2002 35.10 k 34.30 h 35.31 o 34.97 43.65 47.67 c 54.77 51.68 49.40 j 42.29 36.07 34.84 43.24
2003 36.42 33.39 38.54 g 39.07 42.52 52.03 54.77 53.68 c 49.48 e 48.71 c 33.93 p 33.78 d 44.39
2004 31.26 l 36.40 n 38.19 d 40.13 40.78 d 50.24 e 54.42 g 55.06 46.89 k 44.35 e 32.75 j 32.48 h 44.79
2005 ----- z 28.96 c 38.48 38.00 g 47.97 47.78 g 56.42 54.24 f 45.89 l 48.00 k 35.63 33.32 40.13
2006 38.44 f 31.61 e 36.77 41.47 ----- z 53.74 k 54.68 53.52 49.23 41.25 g 39.43 b 33.58 42.54
2007 29.30 a 36.32 38.84 37.42 f 44.00 49.27 56.42 53.94 49.28 a 41.97 35.73 34.52 42.69
2008 31.03 33.41 32.87 36.20 45.44 d 47.77 d 52.79 g 54.84 51.00 47.62 w 40.35 d 31.26 40.42
2009 30.45 30.21 32.67 a 36.30 44.30 a 51.87 ----- z ----- z ----- z ----- z ----- z ----- z 37.63
2010 ----- z ----- z ----- z ----- z ----- z 47.92 e 53.73 e 55.92 e 51.10 45.06 36.77 35.61 46.59
2011 34.16 31.12 c 37.90 35.97 a 43.39 c 49.50 b 53.14 b 54.80 f 54.08 f 44.11 c 37.14 b 32.15 e 39.86
2012 32.44 d 34.50 e 36.67 d 40.46 d 45.15 e 50.71 i 56.09 h 54.82 i 51.53 k 44.33 g 41.54 b 36.74 d 38.21
2013 30.50 e 35.55 f 37.08 e 44.00 z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 33.79
Period of Record Statistics
MEAN 33.05 34.41 38.08 40.72 45.72 51.00 55.09 55.41 51.53 44.39 38.33 33.96 44.03
S.D. 3.28 3.16 2.56 2.72 2.41 1.90 1.78 1.80 2.05 2.22 3.11 2.53 1.06
SKEW -0.38 -0.21 0.03 -0.25 -0.18 -0.13 0.16 -0.22 0.75 1.19 -0.72 -0.71 -0.74
MAX 37.97 38.86 43.61 45.77 51.26 54.43 58.42 58.94 56.63 51.45 42.56 38.68 45.37
MIN 25.58 28.14 32.67 34.97 39.90 47.67 52.35 51.68 48.07 41.08 30.64 26.68 41.67
NO YRS 30 30 34 33 33 33 31 33 27 29 33 34 14