TIDEWATER FISH HATCHERY, OREGON

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 50.0 54.4 57.7 60.3 65.0 69.4 73.9 75.6 74.4 66.7 55.1 49.7 62.7
Highest Mean Max. Temperature (F) 55.8 61.2 65.2 66.9 73.9 73.8 78.1 78.7 81.3 72.4 59.6 52.9 81.3
Year Highest Occurred 1994 1992 1992 1989 1992 1992 1985 1994 1991 1987 1986 1986 1991
Lowest Mean Max. Temperature (F) 45.0 46.0 52.1 54.5 58.6 65.4 70.5 70.7 68.1 59.6 48.5 43.5 43.5
Year Lowest Occurred 1979 1985 1971 1975 1985 1971 1987 1973 1977 1975 1985 1990 1990
Mean Temperature (F) 42.6 45.6 48.1 50.0 54.5 58.8 62.9 64.1 62.0 55.9 47.5 42.7 52.9
Highest Mean Temperature (F) 47.6 51.0 53.6 55.1 59.8 62.4 65.6 66.8 65.4 58.6 51.9 46.7 66.8
Year Highest Occurred 1995 1995 1986 1989 1993 1992 1996 1997 1994 1978 1995 1973 1997
Lowest Mean Temperature (F) 37.0 38.6 42.9 45.1 49.8 55.1 60.9 60.4 58.0 53.1 41.3 35.4 35.4
Year Lowest Occurred 1979 1989 1971 1975 1991 1976 1971 1973 1972 1971 1985 1990 1990
Mean Min. Temperature (F) 35.2 36.8 38.4 39.7 44.0 48.1 51.8 52.5 49.5 45.0 39.8 35.7 43.0
Highest Mean Min. Temperature (F) 40.8 41.0 43.5 44.1 49.3 51.0 55.8 55.0 54.0 50.0 44.9 41.7 55.8
Year Highest Occurred 1986 1991 1986 1994 1993 1993 1998 1999 1995 1988 1995 1973 1998
Lowest Mean Min. Temperature (F) 29.0 30.3 32.7 35.2 40.2 44.0 48.5 49.6 45.1 41.0 33.8 27.3 27.3
Year Lowest Occurred 1979 1989 1985 1985 1991 1976 1984 1980 1972 1991 1978 1990 1990
Mean Precipitation (in.) 14.22 11.93 10.88 7.00 4.66 2.77 0.87 1.16 2.72 5.92 14.07 15.42 91.62
Highest Precipitation (in.) 23.73 25.22 18.86 12.55 8.46 6.75 3.16 3.72 6.49 11.94 31.09 31.46 31.46
Year Highest Occurred 1974 1999 1983 1993 1984 1984 1987 1977 1971 1984 1973 1998 1998
Lowest Precipitation (in.) 1.23 3.48 2.18 1.45 0.35 0.39 0.00 0.00 0.00 0.52 2.55 3.93 0.00
Year Lowest Occurred 1985 1993 1992 1977 1992 1987 1973 1981 1975 1987 1976 1976 1973
Heating Degree Days (F) 694. 543. 525. 450. 330. 193. 86. 66. 114. 285. 527. 692. 4505.
Cooling Degree Days (F) 0. 0. 0. 0. 4. 6. 20. 36. 23. 1. 0. 0. 90.

Western Regional Climate Center, wrcc@dri.edu