Fall 'Freeze' Probabilities (Jul. 31 - Dec. 31)


GRAND CANYON NTL PRK, (023595)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 08/14 09/04 09/13 09/17 09/21 09/23 10/02 10/04 10/08 10/12 10/20
32.5 08/14 09/09 09/19 09/23 09/27 10/04 10/10 10/13 10/17 10/21 10/29
28.5 09/21 10/02 10/08 10/12 10/18 10/23 10/27 10/28 10/29 11/05 11/08
24.5 10/04 10/09 10/16 10/21 10/30 10/31 11/03 11/06 11/12 11/17 11/25
20.5 10/19 10/24 10/29 11/03 11/10 11/14 11/17 11/19 11/24 11/27 11/30
Graphic Output
 Earliest - Earliest date when a minimum temperature below the threshold occurred.
            **/** means there has never been a year when the minimum temperature
                  went below the threshold temperature during the July 31 to 
                  Dec. 31 period or insufficient data to determine a date.
            07/31 means the minimum temperature can go below the threshold 
                  temperature any day during the July 31 to Dec. 31 period.
xx% - Percent probability that a minimum temperature below the threshold will occur on or before the given date. **/** means non-occurrence of the threshold or insufficient data to determine a threshold.
Latest - Latest date when a minimum temperature below the threshold occurred. **/** means there has been a year when the minimum temperature didn't go below the threshold temperature during the July 31 to Dec. 31 period or insufficient data to determine a date.

Western Regional Climate Center, wrcc@dri.edu