DUNCAN, ARIZONA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 60.0 65.0 71.0 79.3 87.7 96.9 97.1 94.4 90.1 80.3 68.2 59.6 79.1
Highest Mean Max. Temperature (F) 68.7 70.5 78.9 88.3 95.7 102.4 101.5 98.0 95.8 86.8 77.1 66.6 102.4
Year Highest Occurred 1986 2000 1989 1989 2000 1990 1980 1994 2000 1987 1999 1980 1990
Lowest Mean Max. Temperature (F) 53.3 59.1 63.2 71.0 82.0 91.6 93.1 90.8 86.0 72.2 61.3 53.5 53.3
Year Lowest Occurred 1985 1998 1973 1983 1992 1972 1990 1990 1996 1984 2000 1971 1985
Mean Temperature (F) 41.9 45.8 51.0 57.5 66.2 75.3 80.2 78.3 72.2 60.7 48.4 41.3 59.9
Highest Mean Temperature (F) 46.9 52.3 56.4 63.3 73.1 81.2 83.8 81.7 76.9 65.0 53.5 45.3 83.8
Year Highest Occurred 1993 1996 1972 2000 2000 1994 2000 1994 1997 1988 1995 1994 2000
Lowest Mean Temperature (F) 37.4 40.3 45.7 51.3 62.3 71.7 77.0 75.4 68.8 56.7 44.1 37.9 37.4
Year Lowest Occurred 1976 1974 1977 1983 1975 1983 1976 1990 1985 1971 1979 1976 1976
Mean Min. Temperature (F) 23.7 26.5 31.0 35.6 44.6 53.6 63.3 62.2 54.2 41.0 28.5 22.9 40.6
Highest Mean Min. Temperature (F) 34.8 34.7 35.8 42.0 50.7 62.1 67.1 65.4 61.5 48.1 33.8 30.5 67.1
Year Highest Occurred 1993 1996 1978 1990 1997 2000 1981 1994 1997 1972 1978 1984 1981
Lowest Mean Min. Temperature (F) 15.3 16.8 23.4 30.3 39.8 47.3 58.0 56.7 48.6 33.9 21.3 15.7 15.3
Year Lowest Occurred 1976 1974 1977 1979 1983 1976 1987 1979 1988 1982 1975 1976 1976
Mean Precipitation (in.) 0.96 0.94 0.62 0.24 0.38 0.38 2.26 2.18 1.06 1.30 0.77 1.19 12.28
Highest Precipitation (in.) 4.09 3.12 1.73 1.33 3.62 2.59 6.10 6.03 2.73 4.40 2.71 4.76 6.10
Year Highest Occurred 1993 1980 1983 1988 1992 1987 1977 1993 1975 1972 1994 1991 1977
Lowest Precipitation (in.) 0.00 0.00 0.00 0.00 0.00 0.00 0.20 0.32 0.00 0.00 0.00 0.00 0.00
Year Lowest Occurred 1999 1999 1996 2000 2000 1995 2000 1975 2000 1999 1999 1999 1999
Heating Degree Days (F) 718. 539. 434. 244. 74. 8. 0. 0. 11. 166. 499. 736. 3429.
Cooling Degree Days (F) 0. 0. 1. 19. 109. 316. 471. 412. 226. 32. 0. 0. 1586.

Western Regional Climate Center, wrcc@dri.edu