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


SPRAY stat, (358009)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 08/29 09/05 09/09 09/09 09/12 09/13 09/15 09/20 09/22 10/01 10/14
32.5 09/09 09/14 09/17 09/21 09/23 09/30 10/03 10/05 10/07 10/11 10/19
28.5 09/14 09/21 09/30 10/05 10/05 10/09 10/16 10/18 10/21 11/03 11/05
24.5 09/17 10/12 10/17 10/22 10/27 10/29 11/01 11/03 11/04 11/18 11/30
20.5 10/13 10/24 11/04 11/05 11/12 11/18 11/26 11/29 12/11 **/** **/**
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