TUCSON MAGNETIC OBSY, ARIZONA

NCDC 1961-1990 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 65.1 68.7 72.9 81.5 90.6 100.4 100.8 98.4 95.0 85.7 74.0 66.0 83.3
Highest Mean Max. Temperature (F) 73.5 73.2 83.5 91.2 96.7 105.1 104.2 102.8 99.7 90.7 80.2 74.8 86.1
Year Highest Occurred 1986 1981 1972 1989 1984 1974 1978 1973 1979 1979 1981 1980 1989
Lowest Mean Max. Temperature (F) 57.9 60.1 62.9 74.3 86.7 94.8 96.3 93.4 90.4 78.1 67.1 60.1 81.1
Year Lowest Occurred 1979 1966 1973 1983 1977 1965 1990 1990 1964 1971 1972 1971 1964
Mean Temperature (F) 49.7 52.8 56.5 63.6 72.0 81.8 86.3 84.3 79.7 69.0 57.5 50.4 67.0
Highest Mean Temperature (F) 55.7 57.4 63.3 71.5 77.8 86.6 89.2 87.5 83.3 74.1 61.3 56.6 69.5
Year Highest Occurred 1986 1968 1989 1989 1984 1990 1980 1969 1979 1987 1981 1980 1989
Lowest Mean Temperature (F) 44.5 45.3 50.6 58.2 67.9 75.3 83.7 80.2 76.0 63.8 51.7 46.2 64.4
Year Lowest Occurred 1964 1964 1973 1970 1965 1965 1984 1968 1985 1970 1972 1974 1964
Mean Min. Temperature (F) 34.2 36.8 40.1 45.5 53.4 63.3 71.8 70.2 64.4 52.3 40.9 34.7 50.6
Highest Mean Min. Temperature (F) 40.0 43.1 45.5 51.8 58.9 69.3 74.3 73.9 68.3 58.5 45.3 39.1 53.3
Year Highest Occurred 1981 1968 1989 1989 1984 1981 1980 1981 1983 1988 1965 1965 1981
Lowest Mean Min. Temperature (F) 25.4 26.8 34.4 39.6 47.7 55.8 68.8 66.4 59.5 45.8 36.3 30.2 47.7
Year Lowest Occurred 1964 1964 1962 1970 1965 1965 1987 1979 1986 1970 1972 1974 1964
Mean Precipitation (in.) 1.17 1.00 1.08 0.36 0.24 0.25 2.15 2.36 1.48 1.22 0.87 1.45 13.63
Highest Precipitation (in.) 3.80 3.25 2.95 1.13 1.42 1.84 6.87 5.09 4.40 6.21 2.67 6.99 26.22
Year Highest Occurred 1979 1980 1983 1968 1982 1984 1990 1971 1976 1983 1978 1965 1983
Lowest Precipitation (in.) 0.00 0.00 0.00 0.00 0.00 0.00 0.52 0.32 0.06 0.00 0.00 0.00 8.13
Year Lowest Occurred 1972 1984 1984 1989 1990 1985 1971 1975 1973 1982 1980 1981 1973
Heating Degree Days (F) 474. 342. 282. 122. 10. 0. 0. 0. 0. 33. 232. 453. 1948.
Cooling Degree Days (F) 0. 0. 19. 80. 227. 504. 660. 598. 441. 157. 7. 0. 2693.

Western Regional Climate Center, wrcc@dri.edu