PETRIFIED FOREST NP, ARIZONA

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Monthly
Mean Max. Temperature (F) 48.4 55.2 62.1 70.3 79.1 89.7 92.3 89.6 83.5 72.1 58.7 49.0 70.8
Highest Mean Max. Temperature (F) 58.6 62.7 70.6 78.5 87.5 95.0 95.8 93.1 89.4 78.0 67.6 56.5 95.8
Year Highest Occurred 2000 2000 1972 1989 2000 1974 1971 1995 2000 1999 1999 1977 1971
Lowest Mean Max. Temperature (F) 35.4 49.0 53.4 63.1 73.8 85.5 87.7 87.0 78.7 63.8 52.7 39.7 35.4
Year Lowest Occurred 1992 1998 1973 1975 1979 1972 1999 1987 1996 1984 2000 1978 1992
Mean Temperature (F) 34.9 40.0 45.8 52.8 61.1 71.0 76.0 74.3 67.8 56.0 43.5 35.1 54.9
Highest Mean Temperature (F) 41.6 45.2 51.0 59.3 67.2 75.5 79.3 77.8 72.1 60.1 48.6 41.2 79.3
Year Highest Occurred 2000 2000 1989 1989 2000 2000 2000 1995 2000 1988 1999 1977 2000
Lowest Mean Temperature (F) 25.0 36.4 41.3 47.3 57.1 67.4 73.9 72.1 63.8 51.1 38.7 28.1 25.0
Year Lowest Occurred 1992 1975 1973 1975 1975 1991 1986 1987 1985 1984 2000 1978 1992
Mean Min. Temperature (F) 21.3 24.8 29.5 35.2 43.1 52.2 59.6 59.0 52.0 39.8 28.2 21.1 38.8
Highest Mean Min. Temperature (F) 29.4 29.8 34.2 40.3 48.5 58.2 63.0 62.5 55.9 45.6 32.7 27.8 63.0
Year Highest Occurred 1993 1996 1978 2000 1992 2000 2000 1995 1997 1972 1978 1983 2000
Lowest Mean Min. Temperature (F) 14.5 18.7 24.2 31.2 38.1 48.8 57.0 55.0 47.3 33.9 22.3 14.9 14.5
Year Lowest Occurred 1992 1984 1971 1983 1971 1995 1987 1978 1985 1982 1976 1976 1992
Mean Precipitation (in.) 0.65 0.59 0.80 0.40 0.53 0.30 1.45 1.62 1.33 1.20 0.79 0.78 10.44
Highest Precipitation (in.) 2.40 2.24 2.28 2.18 2.82 1.95 3.67 4.81 3.45 3.95 2.91 2.12 4.81
Year Highest Occurred 1993 1991 1998 1988 1992 1988 1998 1993 1984 1972 1993 1992 1993
Lowest Precipitation (in.) 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.51 0.01 0.00 0.00 0.00 0.00
Year Lowest Occurred 1972 1984 1997 1993 1989 1998 1993 1985 1973 1999 1999 1999 1972
Heating Degree Days (F) 935. 700. 596. 372. 165. 18. 0. 0. 35. 291. 647. 928. 4687.
Cooling Degree Days (F) 0. 0. 0. 6. 44. 195. 340. 287. 117. 9. 0. 0. 998.

Western Regional Climate Center, wrcc@dri.edu