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


CASCADIA s, r (351433)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 08/10 08/26 09/06 09/08 09/11 09/17 09/20 09/24 10/03 10/13 11/03
32.5 08/12 09/18 09/21 09/24 09/28 10/03 10/12 10/17 10/20 10/31 11/16
28.5 09/13 10/11 10/19 10/29 11/01 11/03 11/07 11/13 11/24 12/08 **/**
24.5 10/09 11/01 11/11 11/20 11/27 12/04 12/13 12/18 12/25 **/** **/**
20.5 10/30 11/21 12/06 12/14 12/21 **/** **/** **/** **/** **/** **/**
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