HEADWORKS PTLD WTR BUR, OREGON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(353770)

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
1899 ----- z ----- z ----- z 39.23 d 43.10 47.67 53.55 51.90 49.77 42.52 45.27 37.48 45.61
1900 37.94 36.18 41.35 41.37 48.29 53.97 54.84 52.03 49.63 43.84 39.57 38.84 44.82
1901 33.26 34.57 36.93 c 37.80 45.55 48.47 49.90 53.32 ----- z 48.19 41.27 37.00 42.39
1902 33.00 37.54 37.42 ----- z ----- z 50.80 54.29 51.84 46.80 44.45 38.77 35.42 43.03
1903 36.29 29.50 ----- z ----- z ----- z 51.63 53.87 55.39 45.67 ----- z ----- z 32.13 43.50
1904 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 35.58 35.58
1905 ----- z ----- z ----- z 40.47 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 40.47
1906 ----- z ----- z ----- z ----- z 44.61 45.93 55.48 50.61 48.57 43.48 38.20 36.13 45.38
1907 27.06 35.14 g 34.45 37.07 44.19 48.40 51.52 49.87 48.57 44.90 38.50 36.13 41.88
1908 34.10 32.52 35.45 38.30 40.71 46.40 53.00 50.19 43.50 42.65 38.30 31.97 40.59
1909 25.45 34.71 34.16 36.30 40.77 46.83 49.16 46.55 47.77 42.32 38.27 28.06 39.20
1910 29.77 30.71 38.00 39.60 44.94 45.66 a 50.52 57.23 50.27 49.16 39.67 37.84 42.78
1911 33.61 34.50 37.45 42.87 45.94 49.00 54.32 50.19 40.97 40.71 36.17 34.35 41.67
1912 32.42 37.00 32.23 36.57 43.29 48.30 51.35 51.29 51.07 41.44 d 37.40 33.94 41.36
1913 29.84 29.39 33.77 36.40 ----- z 48.50 52.06 46.61 44.33 39.19 36.63 31.74 38.95
1914 34.48 34.32 37.81 40.03 43.19 46.17 50.65 53.84 45.47 44.81 37.37 27.68 41.32
1915 30.48 34.79 38.39 38.45 a 43.61 47.18 b 52.68 52.13 47.40 42.77 37.53 34.81 41.68
1916 26.10 31.55 34.65 37.33 37.03 45.17 a 49.32 50.73 a 47.07 37.65 35.00 31.42 38.58
1917 30.71 c 32.14 32.26 36.87 41.61 44.80 49.81 ----- z 49.23 41.06 39.93 40.10 39.87
1918 37.39 32.18 34.26 36.13 40.71 48.80 49.19 50.84 47.87 44.84 37.73 33.58 41.13
1919 32.71 34.54 35.48 37.67 42.16 44.33 50.42 50.35 46.60 38.19 36.67 25.84 39.58
1920 33.71 29.90 35.68 35.53 39.00 46.37 51.32 52.42 48.10 42.29 35.53 36.84 40.56
1921 32.68 34.50 36.00 38.93 40.94 63.70 46.48 49.32 44.17 42.10 40.23 31.50 a 41.71
1922 28.13 28.43 32.48 34.60 41.55 46.67 50.42 51.71 48.20 44.35 33.73 29.16 39.12
1923 34.16 31.21 32.48 38.87 44.42 48.10 52.71 52.71 49.00 43.68 40.43 33.68 41.79
1924 31.16 38.38 35.06 37.17 43.94 46.93 48.94 50.70 a 47.47 44.26 37.87 26.97 40.74
1925 36.00 37.43 35.90 41.20 44.84 49.60 52.23 50.26 48.90 42.35 37.33 38.10 42.84
1926 34.61 38.86 38.35 43.03 44.35 48.50 50.06 54.65 49.43 49.65 44.27 37.74 44.46
1927 34.32 32.54 32.32 35.53 43.55 50.13 49.55 50.58 47.63 43.68 40.80 30.87 40.96
1928 31.74 32.41 39.10 38.23 43.26 49.07 51.45 49.06 50.63 46.23 39.23 32.74 41.93
1929 27.87 27.54 35.74 36.97 42.45 47.87 48.35 49.13 a 45.70 43.58 33.83 37.29 39.69
1930 21.68 35.71 36.13 42.13 42.42 46.70 48.29 51.68 49.63 41.94 36.70 33.77 40.57
1931 35.81 34.79 37.10 39.07 46.03 49.33 50.27 a 49.97 47.30 42.71 35.20 32.58 41.68
1932 31.61 29.62 37.58 38.73 42.90 49.27 48.77 52.03 45.60 44.58 40.00 29.29 40.83
1933 31.68 28.18 34.71 36.10 41.39 46.43 49.94 51.26 44.97 43.13 36.00 38.48 40.19
1934 37.77 37.89 40.58 43.80 46.26 47.97 50.74 52.71 47.07 45.00 42.03 36.35 44.01
1935 30.10 34.64 34.00 37.13 41.74 48.27 51.00 49.71 48.07 41.32 31.97 34.32 40.19
1936 34.74 25.41 33.16 40.73 46.63 a 50.77 52.29 51.13 46.00 43.68 34.57 35.81 41.24
1937 22.48 30.75 35.29 37.90 43.06 50.17 53.03 50.74 48.87 45.74 41.00 36.03 41.26
1938 32.77 33.39 35.19 38.90 42.97 47.90 52.32 48.81 49.53 43.94 34.00 a 34.10 41.15
1939 35.71 32.04 34.13 38.93 44.23 46.27 51.97 49.94 47.20 44.19 38.93 38.94 41.87
1940 33.20 a 37.79 38.35 41.60 44.74 47.37 51.65 51.58 51.53 46.97 36.73 35.32 43.07
1941 34.61 36.64 38.74 41.30 45.23 49.37 55.10 52.52 48.90 44.26 38.97 34.87 43.37
1942 29.29 33.25 33.65 39.93 43.13 46.37 55.03 53.52 47.87 43.71 37.60 34.81 41.51
1943 27.55 32.21 35.03 40.93 41.77 47.10 51.77 a 50.19 47.90 44.77 37.57 32.61 40.78
1944 30.90 33.28 33.06 39.73 43.16 47.90 51.61 50.03 48.10 45.68 37.00 33.35 41.15
1945 34.42 34.36 34.61 37.87 44.65 45.87 49.87 50.13 45.77 41.32 37.83 34.13 40.90
1946 34.10 34.36 35.74 38.17 45.32 48.10 51.32 50.23 46.70 39.71 33.50 35.06 41.03
1947 29.29 35.11 37.68 40.07 45.32 48.00 a 51.16 48.81 47.93 a 44.97 38.20 34.74 41.77
1948 31.65 31.17 33.61 37.13 43.10 51.97 48.87 51.35 44.62 a 39.35 34.27 29.29 39.70
1949 21.07 a 28.79 33.67 a 37.27 43.23 45.31 a 49.07 a 50.19 48.00 a 37.20 a 40.00 31.77 a 38.80
1950 20.77 28.93 33.23 35.17 37.32 44.73 50.17 a 51.35 46.03 43.23 35.70 38.29 38.74
1951 30.79 b 31.96 30.03 a 36.03 41.67 a 45.87 48.43 a 46.52 b 45.43 40.63 a 35.00 a 29.55 38.49
1952 30.27 a 32.32 a 34.26 37.48 a 42.74 47.67 50.13 50.77 47.59 a 44.26 33.03 33.57 a 40.34
1953 39.40 a 34.82 34.67 a 38.03 42.39 46.03 49.42 51.81 48.40 43.39 40.40 35.71 42.04
1954 30.87 a 33.04 30.68 36.10 42.20 a 45.57 48.90 a 50.53 a 47.83 40.97 a 40.45 a 33.29 40.03
1955 30.71 32.64 32.29 35.10 40.00 47.27 50.03 48.87 a 46.63 43.67 a 32.79 a 32.13 a 39.34
1956 32.53 a 28.38 32.32 37.40 44.07 a 45.97 a 50.26 50.68 46.67 40.55 34.33 33.39 39.71
1957 24.42 30.36 35.32 38.77 45.55 47.47 48.48 47.33 a 47.70 42.19 34.27 34.77 39.72
1958 36.48 40.61 34.58 40.00 47.58 54.17 54.45 52.45 49.53 45.19 39.77 39.45 44.52
1959 34.87 33.39 36.06 38.80 42.52 49.70 52.03 49.68 47.77 43.35 37.33 36.26 41.81
1960 31.61 36.41 36.19 40.90 43.81 47.60 51.16 50.90 47.50 43.84 38.73 35.81 42.04
1961 38.77 38.39 38.42 38.40 44.97 50.23 52.74 53.65 46.10 41.61 33.50 34.58 42.61
1962 32.13 35.21 34.48 41.30 42.71 46.10 49.71 50.94 48.10 43.39 39.13 36.84 41.67
1963 28.35 41.04 36.48 38.90 43.68 49.03 51.90 53.19 53.90 47.26 40.57 36.65 43.41
1964 36.26 33.41 36.23 37.30 41.55 47.63 51.45 52.35 49.30 47.68 37.10 32.45 41.89
1965 36.10 35.25 35.03 40.07 41.65 47.23 52.90 55.00 47.70 47.71 42.80 33.40 a 42.90
1966 34.10 34.86 35.87 40.60 42.55 47.97 51.39 53.52 51.13 44.23 41.17 38.35 42.98
1967 37.06 35.96 35.19 36.97 44.52 51.10 52.81 56.68 53.33 46.68 41.70 33.19 43.77
1968 33.81 40.17 39.90 38.23 45.55 48.73 53.32 53.77 51.20 43.23 39.20 31.26 43.20
1969 28.45 33.61 35.26 39.90 45.42 52.30 51.10 50.97 51.83 44.55 40.17 36.71 42.52
1970 35.13 39.25 37.26 36.97 42.00 50.57 51.52 51.94 47.73 43.55 39.27 34.13 42.44
1971 33.16 35.61 34.16 37.83 44.23 46.47 52.29 53.35 47.07 42.06 37.47 33.19 41.41
1972 31.06 35.41 38.58 36.20 43.35 48.10 51.39 51.84 46.43 40.68 39.50 30.26 41.07
1973 33.00 37.71 37.42 40.10 45.39 49.27 52.74 50.52 51.33 43.81 35.77 39.29 43.03
1974 31.16 35.21 36.68 40.37 42.42 47.93 51.84 53.16 51.00 42.74 38.87 36.10 42.29
1975 33.74 33.07 36.23 36.00 43.23 47.87 52.84 50.87 50.77 46.55 38.03 38.16 42.28
1976 35.35 34.17 34.61 39.57 44.23 46.87 50.52 52.47 a 50.93 43.97 41.23 35.39 42.44
1977 31.48 38.46 35.52 39.80 41.81 49.40 51.19 55.84 49.30 44.77 a 37.10 37.16 42.65
1978 36.07 c 37.32 38.55 39.17 42.39 50.47 53.10 54.13 51.13 45.71 33.27 30.61 42.66
1979 27.13 33.25 38.23 40.40 44.32 48.20 52.23 52.94 52.57 47.16 39.70 39.06 42.93
1980 29.81 37.14 37.13 41.27 44.81 47.63 52.87 51.32 50.67 47.32 41.73 37.47 a 43.26
1981 40.13 a 35.82 38.97 41.10 45.74 48.80 52.10 54.52 49.30 42.84 40.07 37.03 43.87
1982 33.03 34.68 35.16 36.13 42.61 50.20 51.71 53.61 51.03 46.16 37.67 36.19 42.35
1983 39.06 40.71 41.35 39.50 46.16 49.63 52.65 53.55 48.93 44.39 41.93 30.97 44.07
1984 35.23 37.52 40.65 39.70 43.26 47.73 51.19 52.26 50.20 43.65 39.23 32.74 42.78
1985 32.87 31.50 34.00 40.97 43.71 48.43 54.29 51.65 48.00 43.71 31.27 28.65 40.75
1986 38.29 35.79 41.42 39.20 44.87 51.37 51.42 54.52 49.33 46.32 40.90 36.42 44.15
1987 34.03 38.29 39.39 41.60 46.35 49.37 52.71 52.23 ----- z 44.97 41.40 32.84 43.02
1988 32.45 35.14 35.32 40.73 43.26 47.57 49.90 50.77 48.93 48.13 39.83 35.10 42.26
1989 34.26 28.07 37.35 42.73 44.74 50.30 52.03 53.58 49.90 44.19 41.80 34.77 42.81
1990 36.29 32.89 38.06 42.93 44.55 50.67 54.06 55.13 52.07 43.61 40.70 27.61 43.22
1991 32.52 40.46 36.00 39.73 43.39 47.50 53.61 54.29 50.10 43.45 41.40 38.16 43.38
1992 37.90 41.00 40.13 44.23 47.52 51.60 55.16 53.45 49.63 46.87 40.27 33.81 45.13
1993 31.29 33.18 38.74 42.63 48.00 49.60 52.26 53.97 49.00 46.97 33.33 34.84 42.82
1994 37.13 33.68 37.87 42.33 47.13 48.00 53.00 53.55 52.13 43.94 34.90 35.45 43.26
1995 38.19 36.89 38.03 39.80 45.84 49.40 55.29 51.87 53.90 45.48 44.33 37.81 44.74
1996 35.19 34.72 37.00 42.63 43.94 48.47 54.35 53.90 48.43 45.13 39.07 35.32 43.18
1997 35.52 35.75 37.87 41.17 48.55 ----- z 53.52 54.74 52.83 44.29 42.93 35.35 43.87
1998 37.26 38.43 38.84 40.70 46.68 51.17 57.13 54.74 49.77 44.39 41.77 32.58 44.45
1999 36.45 36.46 36.10 37.90 41.77 49.30 52.65 55.77 49.27 43.97 42.40 37.39 43.29
2000 34.23 37.45 35.74 41.70 45.19 49.13 53.16 51.87 51.60 46.29 36.80 36.42 43.30
2001 36.26 34.14 38.52 38.63 44.48 48.23 52.19 54.65 50.97 44.42 42.13 36.61 43.44
2002 35.71 35.64 35.61 40.00 43.35 50.40 54.16 52.65 49.40 44.32 40.87 38.45 43.38
2003 40.65 37.11 40.10 39.80 44.55 51.10 53.61 54.29 51.97 48.48 37.53 36.81 44.67
2004 33.35 38.45 39.90 42.27 47.45 50.77 55.19 56.42 51.50 44.39 39.63 38.13 44.79
2005 36.29 35.07 39.32 41.80 49.03 49.70 54.10 53.58 47.87 47.81 38.80 34.55 43.99
2006 39.00 34.25 36.74 40.13 45.71 52.20 54.84 52.03 50.40 43.16 39.73 35.42 43.63
2007 31.87 37.14 39.84 41.13 44.48 50.21 b 55.13 a 54.29 49.17 43.87 35.50 33.23 a 42.99
2008 32.39 35.34 35.74 37.10 45.03 47.00 52.83 a 55.65 49.60 44.10 42.90 31.65 42.44
2009 32.87 34.11 35.06 38.27 44.13 51.83 55.94 55.16 52.70 44.35 39.17 31.32 42.91
2010 39.68 38.18 38.06 39.90 42.42 48.63 51.90 52.97 52.47 46.42 38.40 36.68 43.81
2011 35.10 32.79 36.26 37.37 42.35 49.03 51.94 54.16 53.17 47.58 37.71 b 32.74 42.52
2012 35.03 36.76 34.84 41.07 44.03 48.57 53.87 54.35 50.17 a 46.03 42.57 35.84 43.59
2013 32.58 36.04 37.97 a ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 35.53
Period of Record Statistics
MEAN 33.03 34.52 36.24 39.16 43.82 48.62 51.90 52.09 48.80 44.04 38.41 34.49 42.08
S.D. 3.96 3.21 2.38 2.14 2.10 2.42 1.98 2.16 2.35 2.34 2.89 2.99 1.58
SKEW -0.82 -0.28 0.02 0.07 -0.24 2.30 0.02 -0.13 -0.21 -0.27 -0.24 -0.59 -0.30
MAX 40.65 41.04 41.42 44.23 49.03 63.70 57.13 57.23 53.90 49.65 45.27 40.10 45.13
MIN 20.77 25.41 30.03 34.60 37.03 44.33 46.48 46.52 40.97 37.20 31.27 25.84 38.49
NO YRS 111 110 110 110 109 111 112 111 110 111 111 113 102