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


NOTI 1 NW, OREGON (356173)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 08/08 08/28 09/06 09/10 09/11 09/13 09/16 09/17 09/21 09/29 10/03
32.5 09/01 09/10 09/16 09/22 09/29 10/03 10/10 10/15 10/20 10/23 11/15
28.5 09/14 09/27 10/03 10/13 10/16 10/19 10/21 11/04 11/25 12/11 12/19
24.5 10/14 10/20 11/06 11/13 12/03 12/14 12/20 **/** **/** **/** **/**
20.5 10/28 11/13 12/04 12/15 12/19 12/30 **/** **/** **/** **/** **/**
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