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


CORVALLIS STATE UNIV, (351862)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 09/08 09/19 09/24 09/26 10/02 10/06 10/11 10/16 10/20 10/25 11/16
32.5 09/21 10/02 10/11 10/15 10/19 10/27 10/31 11/03 11/09 11/19 12/09
28.5 09/24 10/24 11/01 11/04 11/08 11/16 11/23 12/02 12/08 12/19 **/**
24.5 10/21 11/11 11/23 12/04 12/13 12/18 12/26 **/** **/** **/** **/**
20.5 11/02 11/29 12/14 12/25 **/** **/** **/** **/** **/** **/** **/**
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