HILLSBORO, OREGON

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(353908)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 200305
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
1929 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 28.92 f 36.23 36.23
1930 18.13 a 36.59 a 36.16 41.20 41.29 42.37 45.57 a 45.23 45.03 36.19 34.54 b 31.30 d 37.80
1931 35.00 c 30.82 37.65 39.47 44.13 47.17 a 49.40 a 45.84 47.17 39.45 32.67 33.71 40.21
1932 31.81 33.45 38.90 39.97 42.58 47.87 46.42 49.45 49.21 b 43.85 e 39.14 b 30.14 b 41.07
1933 35.03 29.75 35.97 36.20 41.33 d 46.97 48.29 50.35 44.93 40.89 c 35.04 f 39.87 a 40.87
1934 37.89 m 33.96 c 40.17 a 43.71 b 37.50 a 41.00 50.61 50.03 46.27 42.81 40.93 34.58 41.96
1935 31.35 33.44 a 32.39 37.30 35.81 39.63 48.81 49.10 45.23 38.10 31.77 30.90 37.82
1936 35.30 a 27.14 32.39 39.86 a 46.13 54.10 51.58 50.77 44.33 39.16 28.10 36.65 40.46
1937 22.23 33.93 38.52 40.43 45.52 51.79 a 51.23 51.19 48.70 42.75 c 41.37 35.55 41.93
1938 32.61 33.75 36.42 40.20 46.03 48.87 50.35 47.37 a 49.10 41.94 33.80 32.13 a 41.05
1939 35.77 31.48 c 35.55 37.90 42.42 45.80 49.61 49.97 47.17 43.48 36.15 c 39.00 a 41.19
1940 33.16 38.97 41.39 40.53 46.03 46.83 51.42 51.26 51.07 46.68 35.30 35.81 43.20
1941 34.52 35.18 38.39 39.37 44.87 48.72 a 53.55 53.84 46.67 43.26 37.77 34.90 42.59
1942 27.94 33.86 32.61 39.40 43.81 46.30 52.45 51.23 45.37 41.77 36.47 36.10 40.61
1943 24.97 31.70 a 33.32 41.63 40.90 47.73 50.06 49.19 46.00 43.68 33.10 30.16 39.37
1944 30.19 32.56 b 33.19 38.80 41.61 46.30 48.74 47.79 b 47.07 44.13 34.10 29.10 39.47
1945 33.71 36.07 35.48 39.43 45.52 45.60 50.03 48.58 43.73 38.35 36.67 33.06 40.52
1946 33.06 33.29 36.45 37.80 44.87 47.77 50.68 48.29 46.50 39.13 32.97 34.87 40.47
1947 29.06 35.07 37.10 41.57 43.81 48.50 50.16 48.65 45.47 44.58 36.63 34.23 41.23
1948 ----- z ----- z ----- z ----- z ----- z ----- z 50.90 a 51.81 45.47 40.17 a 35.48 a 30.70 a 42.42
1949 18.80 a 30.75 36.81 39.93 a 45.45 47.62 a 50.35 51.94 48.69 a 36.68 39.63 34.00 40.05
1950 21.83 a 32.11 36.76 b 37.27 40.40 a 50.03 50.90 a 51.77 46.83 43.19 37.80 40.50 a 40.78
1951 32.45 34.79 31.68 37.87 43.77 48.50 52.35 48.35 47.83 43.90 a 38.07 a 31.61 40.93
1952 29.97 34.03 35.68 38.67 43.61 48.64 b 51.97 51.13 a 46.96 b 43.30 a 28.97 a 34.27 a 40.60
1953 41.13 a 34.46 36.48 b 38.90 43.97 48.07 52.13 53.28 b 49.47 42.23 40.93 36.21 b 43.10
1954 32.29 33.96 32.15 d 37.83 a 43.45 46.00 49.03 a 51.30 a 47.13 39.47 a 42.03 34.03 40.72
1955 32.45 32.36 32.48 36.50 41.26 47.83 50.35 48.00 47.33 43.71 34.73 32.87 39.99
1956 34.55 29.79 37.13 41.57 47.35 47.37 53.16 53.58 48.97 43.34 b 34.43 35.23 42.21
1957 25.03 34.32 40.81 41.60 49.10 51.03 52.39 51.33 a 51.20 44.03 34.13 37.55 42.71
1958 37.29 42.54 36.03 40.80 49.35 55.73 57.65 55.55 50.43 43.90 39.00 39.26 45.63
1959 35.81 35.79 37.74 40.73 43.19 50.43 53.19 48.71 47.70 43.06 34.60 32.45 41.95
1960 29.23 33.55 35.74 40.20 44.06 49.57 52.23 52.68 48.33 44.16 38.37 32.03 41.68
1961 37.81 41.21 40.39 41.83 46.03 51.50 53.97 55.61 45.40 41.19 34.40 35.97 43.78
1962 30.94 34.79 35.55 41.30 43.48 47.40 49.39 51.87 48.27 42.48 39.53 34.06 41.59
1963 27.00 38.43 35.00 39.67 44.29 49.93 50.84 51.81 50.47 43.52 38.37 31.84 41.76
1964 36.06 30.86 34.48 35.13 39.06 47.37 50.77 48.58 42.47 38.20 a 33.03 32.84 39.07
1965 34.32 35.21 33.00 38.63 39.32 44.73 50.97 52.77 42.53 41.35 39.83 31.29 40.33
1966 34.23 32.54 36.00 38.87 40.71 46.27 50.94 47.68 47.57 39.10 39.33 38.35 40.96
1967 37.84 33.50 34.53 a 34.53 41.00 49.60 52.26 53.55 47.00 a 43.47 a 38.73 35.84 41.82
1968 34.77 39.17 39.45 36.53 43.97 48.97 51.23 51.94 47.87 41.45 39.37 33.32 42.34
1969 28.74 33.86 33.58 38.87 44.10 a 55.37 50.71 47.52 49.13 40.61 37.70 36.87 41.42
1970 36.00 37.00 36.74 37.00 41.65 49.10 50.16 49.23 44.83 38.68 38.10 34.94 41.12
1971 35.39 34.89 36.19 39.30 43.94 46.80 52.13 53.97 46.70 40.48 38.27 34.26 41.86
1972 32.81 35.59 40.42 36.80 45.71 49.73 54.55 52.77 45.90 39.32 39.00 28.32 41.74
1973 33.26 36.29 37.55 37.83 43.71 48.93 52.74 48.48 47.86 a 41.84 37.33 38.87 42.06
1974 32.00 36.29 38.39 41.23 43.55 50.03 52.45 52.55 47.97 38.10 38.10 37.42 42.34
1975 35.58 34.64 36.84 36.10 43.84 48.07 53.55 50.87 46.33 44.77 37.33 36.90 42.07
1976 35.35 33.24 34.68 38.67 43.52 46.27 50.90 53.00 49.17 41.29 35.97 32.48 41.21
1977 28.68 f 33.82 35.06 38.00 42.32 48.70 50.48 55.29 49.47 41.97 36.57 37.97 42.70
1978 37.61 39.32 38.97 40.87 43.20 a 50.79 a 53.55 53.23 49.47 40.84 30.20 28.45 42.21
1979 23.52 35.75 37.81 40.67 43.68 48.77 52.27 a 52.16 49.76 a 44.32 35.13 37.52 41.78
1980 28.16 34.86 37.29 40.93 44.26 47.93 51.81 47.26 45.27 39.16 39.70 36.19 41.07
1981 33.74 34.61 35.94 40.13 44.45 48.87 51.61 52.90 46.97 39.94 37.77 36.55 41.96
1982 32.10 34.14 34.45 35.57 42.10 50.97 52.03 51.87 48.27 40.65 34.27 33.77 40.85
1983 36.29 39.57 41.19 39.47 45.84 49.47 52.68 52.45 45.03 38.23 42.03 30.42 42.72
1984 33.81 34.66 39.35 39.03 41.97 47.93 50.32 49.06 45.77 39.97 37.30 29.71 40.74
1985 26.00 30.07 32.39 40.17 42.45 48.20 52.84 50.00 44.93 39.19 29.57 25.00 38.40
1986 34.94 36.29 40.52 38.43 44.48 52.07 50.55 53.65 47.27 41.61 39.07 32.61 42.62
1987 33.03 36.43 38.90 39.97 46.58 50.17 53.71 51.58 47.13 39.35 39.23 32.55 42.39
1988 32.42 33.86 35.71 41.03 43.45 49.33 52.32 49.84 44.67 45.90 40.33 33.10 41.83
1989 35.10 26.96 37.55 42.20 44.77 50.93 52.29 51.81 46.40 41.94 39.43 33.19 41.88
1990 36.00 33.29 37.35 41.97 43.97 51.00 53.97 54.29 51.50 40.84 38.13 26.94 42.44
1991 30.61 38.43 35.06 40.63 43.97 49.13 52.77 53.90 48.60 39.52 39.70 35.26 42.30
1992 36.06 39.38 38.90 43.73 45.42 52.47 55.94 51.29 46.20 43.90 39.13 32.81 43.77
1993 29.48 31.00 39.13 42.13 49.16 50.53 52.03 53.35 46.67 43.61 29.93 33.10 41.68
1994 37.16 31.75 38.16 41.73 46.90 48.77 53.13 52.48 49.90 38.74 33.80 36.29 42.40
1995 38.32 36.14 37.06 38.97 47.68 50.67 56.77 51.19 52.97 42.71 43.07 36.26 44.32
1996 36.26 32.69 37.52 43.47 45.42 50.17 56.84 53.03 47.87 43.06 37.60 36.03 43.33
1997 35.77 35.25 38.42 40.73 50.16 52.07 56.19 56.48 52.07 44.58 45.60 35.74 45.26
1998 39.00 40.57 42.35 43.70 50.55 55.67 60.97 57.00 52.87 46.32 45.50 35.16 47.47
1999 37.84 39.71 38.45 40.57 45.55 b 52.17 52.29 q ----- z ----- z 41.00 s 44.50 41.81 42.57
2000 34.03 37.41 40.74 48.23 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 40.11
2001 ----- z ----- z ----- z ----- z 50.32 46.97 a 52.58 52.42 47.63 39.61 38.96 f 32.78 m 48.26
2002 33.65 34.04 33.52 40.07 44.77 51.18 b 54.40 k 52.93 p 48.40 o 40.71 37.17 36.45 39.06
2003 38.61 35.86 41.26 42.03 46.00 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 40.75
Period of Record Statistics
MEAN 32.66 34.62 36.77 39.77 44.12 48.86 51.87 51.23 47.45 41.60 37.13 34.24 41.63
S.D. 4.70 3.03 2.59 2.28 2.75 2.84 2.42 2.48 2.23 2.35 3.65 3.19 1.64
SKEW -1.15 0.13 -0.02 0.41 -0.06 -0.31 0.80 -0.09 0.29 -0.10 -0.20 -0.29 0.57
MAX 41.13 42.54 42.35 48.23 50.55 55.73 60.97 57.00 52.97 46.68 45.60 41.81 47.47
MIN 18.13 26.96 31.68 34.53 35.81 39.63 45.57 45.23 42.47 36.19 28.10 25.00 37.80
NO YRS 70 72 72 72 72 71 70 70 70 71 70 72 65