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


RIVERDALE, UTAH (427318)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 08/29 09/11 09/15 09/17 09/21 09/22 09/24 09/28 10/03 10/13 11/02
32.5 09/15 09/24 09/28 10/04 10/08 10/11 10/15 10/17 10/19 10/24 11/08
28.5 09/25 10/11 10/15 10/19 10/23 10/26 10/29 11/01 11/04 11/10 11/26
24.5 10/08 10/21 10/30 11/01 11/05 11/07 11/09 11/15 11/18 11/20 12/10
20.5 10/25 11/02 11/06 11/09 11/12 11/15 11/18 11/20 11/27 12/01 12/20
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