NAMPA 2 NW, IDAHO

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 52.8 57.2 62.6 70.5 79.6 90.3 95.9 93.8 86.3 75.0 61.3 53.5 73.2
Highest Mean Max. Temperature (F) 60.8 64.8 72.4 79.3 86.9 96.1 99.2 98.8 92.3 83.2 70.3 61.9 99.2
Year Highest Occurred 1986 1995 1972 1989 1984 1974 1994 1996 1979 1988 1995 1980 1994
Lowest Mean Max. Temperature (F) 44.4 51.1 53.9 61.3 71.1 83.7 92.0 87.4 80.4 68.3 52.8 46.5 44.4
Year Lowest Occurred 1979 1998 1973 1975 1977 1998 1992 1983 1986 1972 1994 1992 1979
Mean Temperature (F) 41.3 45.2 50.4 57.6 66.3 76.8 83.2 81.0 72.7 61.2 48.6 41.5 60.5
Highest Mean Temperature (F) 48.3 50.8 56.5 64.8 73.3 82.9 87.6 85.2 77.5 67.9 54.3 49.6 87.6
Year Highest Occurred 1986 1995 1972 1989 1984 1981 1981 1994 1979 1988 1995 1980 1981
Lowest Mean Temperature (F) 35.7 39.8 43.8 50.4 59.5 69.5 78.8 76.0 68.2 54.7 40.9 35.9 35.7
Year Lowest Occurred 1979 1994 1973 1975 1977 1995 1997 1983 1985 1984 1994 1990 1979
Mean Min. Temperature (F) 29.7 33.1 38.2 44.6 52.9 63.3 70.5 68.2 59.1 47.4 35.9 29.5 47.7
Highest Mean Min. Temperature (F) 36.4 38.8 43.8 51.3 59.8 71.4 77.2 73.1 64.6 54.2 42.5 38.7 77.2
Year Highest Occurred 1981 1980 1978 1981 1984 1981 1981 1995 1981 1978 1981 1977 1981
Lowest Mean Min. Temperature (F) 24.0 28.0 32.7 37.6 46.8 54.2 62.8 63.5 55.5 40.1 28.7 21.8 21.8
Year Lowest Occurred 1973 1994 1977 1999 1998 1995 1997 1999 1985 1984 2000 1990 1990
Mean Precipitation (in.) 1.54 1.80 2.03 0.52 0.29 0.12 0.85 1.06 0.51 0.34 0.74 0.76 10.56
Highest Precipitation (in.) 5.70 7.31 7.09 3.21 1.45 0.85 3.60 8.96 3.53 1.86 2.65 3.00 8.96
Year Highest Occurred 1993 1998 1992 1978 1998 1998 1984 1983 1997 1992 1984 1984 1983
Lowest Precipitation (in.) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Year Lowest Occurred 1991 1987 1997 1997 1997 2000 2000 1996 2000 1999 2000 2000 1991
Heating Degree Days (F) 737. 556. 457. 260. 103. 10. 0. 0. 10. 180. 494. 729. 3536.
Cooling Degree Days (F) 0. 0. 4. 36. 141. 363. 564. 496. 241. 62. 2. 0. 1909.

Western Regional Climate Center, wrcc@dri.edu