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


SKAMANIA FISH HATCHERY, (457696)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 07/31 08/21 08/27 09/01 09/05 09/11 09/17 09/21 09/30 10/10 10/25
32.5 09/01 09/12 09/17 09/19 09/25 10/03 10/12 10/15 10/19 10/30 11/10
28.5 09/13 09/22 10/10 10/16 10/24 11/01 11/04 11/10 11/16 11/22 12/27
24.5 10/06 10/15 10/31 11/12 11/19 11/25 11/29 12/14 12/26 **/** **/**
20.5 10/07 11/13 11/23 12/05 12/15 12/19 **/** **/** **/** **/** **/**
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