N WILLAMETTE EXP STN, OREGON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 46.9 51.0 55.9 60.5 66.9 73.0 80.1 80.4 75.3 64.1 52.3 46.2 62.7
Highest Mean Max. Temperature (F) 50.8 56.4 63.1 65.9 75.3 79.6 86.4 85.9 83.3 72.5 57.7 51.3 86.4
Year Highest Occurred 1995 1992 1992 1989 1992 1992 1985 1986 1974 1987 1997 1979 1985
Lowest Mean Max. Temperature (F) 39.2 43.3 51.1 55.4 61.1 67.0 72.0 73.8 68.7 58.3 44.1 39.8 39.2
Year Lowest Occurred 1979 1989 1971 1975 1991 1971 1993 1976 1978 1984 1985 1990 1979
Mean Temperature (F) 40.0 42.8 46.4 50.1 55.7 61.2 66.5 66.6 62.0 53.0 45.0 39.7 52.4
Highest Mean Temperature (F) 44.3 47.6 51.0 54.3 61.0 65.7 70.4 70.0 66.8 56.8 50.7 43.9 70.4
Year Highest Occurred 1995 1991 1992 1989 1997 1992 1996 1997 1974 1988 1995 1979 1996
Lowest Mean Temperature (F) 31.3 35.0 42.3 45.5 52.0 57.3 62.5 62.3 58.1 49.6 37.6 33.1 31.3
Year Lowest Occurred 1979 1989 1971 1972 1977 1971 1993 1973 1985 1971 1985 1990 1979
Mean Min. Temperature (F) 33.0 34.5 36.8 39.7 44.5 49.3 52.8 52.7 48.7 41.8 37.6 33.1 42.0
Highest Mean Min. Temperature (F) 37.8 38.8 40.6 43.3 48.5 52.1 57.1 56.3 53.2 46.2 43.9 37.8 57.1
Year Highest Occurred 1995 1991 1983 1992 1997 1986 1998 1997 1995 1988 1995 1977 1998
Lowest Mean Min. Temperature (F) 23.3 26.6 32.1 35.2 41.5 45.6 50.5 47.7 45.6 37.6 29.9 25.1 23.3
Year Lowest Occurred 1979 1989 1985 1972 1977 1976 1984 1973 1972 1974 1993 1985 1979
Mean Precipitation (in.) 5.94 5.07 4.28 3.14 2.50 1.75 0.73 0.83 1.77 3.36 6.48 6.75 42.60
Highest Precipitation (in.) 9.99 12.04 8.59 6.76 5.57 5.35 2.68 2.69 3.61 6.94 13.04 15.72 15.72
Year Highest Occurred 1980 1996 1997 1996 1998 1984 1983 1977 1982 1994 1973 1996 1996
Lowest Precipitation (in.) 0.45 0.26 1.46 0.64 0.19 0.30 0.00 0.00 0.00 0.20 1.39 1.48 0.00
Year Lowest Occurred 1985 1993 1992 1977 1992 1987 1984 2000 1993 1988 1993 1976 1984
Heating Degree Days (F) 777. 623. 578. 448. 293. 141. 47. 48. 132. 374. 601. 785. 4847.
Cooling Degree Days (F) 0. 0. 0. 0. 5. 26. 92. 96. 42. 0. 0. 0. 261.

Western Regional Climate Center, wrcc@dri.edu