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


ARIZONA SONORA DESERT M, ARIZONA (020415)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 10/30 10/07 10/31 10/16 11/23 11/28 12/01 10/30 12/08 11/06 12/11
32.5 10/30 10/17 10/31 10/25 11/24 11/28 12/02 11/07 12/20 11/14 12/30
28.5 12/03 10/29 12/07 11/03 12/12 12/22 **/** 11/16 **/** 11/23 **/**
24.5 12/18 11/03 **/** 11/13 **/** **/** **/** 11/27 **/** 12/06 **/**
20.5 12/21 11/07 **/** 11/21 **/** **/** **/** 12/13 **/** **/** **/**
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