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


COTTAGE GROVE DAM, s (351902)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 09/10 09/23 09/30 10/03 10/08 10/13 10/17 10/20 10/25 10/31 11/21
32.5 09/13 10/08 10/15 10/22 10/27 11/01 11/03 11/08 11/13 11/20 12/01
28.5 10/06 10/30 11/07 11/14 11/19 11/22 11/30 12/05 12/10 12/20 **/**
24.5 10/29 11/20 12/07 12/14 12/19 12/30 **/** **/** **/** **/** **/**
20.5 10/31 12/01 12/15 12/23 **/** **/** **/** **/** **/** **/** **/**
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