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


VALSETZ st, (358833)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 07/31 08/16 08/30 09/14 09/19 09/23 09/27 09/29 10/04 10/12 10/18
32.5 07/31 09/17 09/27 10/03 10/11 10/15 10/17 10/19 10/21 10/27 11/01
28.5 10/01 10/18 10/28 11/03 11/09 11/12 11/13 11/26 11/29 12/12 12/23
24.5 10/28 11/05 11/12 11/18 11/28 12/07 12/08 12/14 12/20 **/** **/**
20.5 11/12 11/14 11/24 12/16 12/20 12/29 **/** **/** **/** **/** **/**
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