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


BOISE AIR TERMINAL, (101022)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 08/24 09/11 09/18 09/20 09/22 09/24 09/29 10/03 10/05 10/12 10/25
32.5 09/12 09/22 09/28 10/03 10/05 10/09 10/16 10/19 10/22 10/27 11/11
28.5 09/14 10/03 10/08 10/16 10/19 10/25 10/27 10/30 11/01 11/08 11/15
24.5 09/14 10/14 10/22 10/27 10/30 11/02 11/09 11/14 11/17 11/24 12/19
20.5 10/09 10/30 11/03 11/12 11/17 11/21 11/24 12/03 12/06 12/15 **/**
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