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


RAGER RS s, r (356982)
Temp F Earliest 10% 20% 30% 40% 50% 60% 70% 80% 90% Latest
36.5 08/01 08/05 08/15 08/15 08/18 08/21 08/26 09/08 09/04 09/17 09/12
32.5 08/28 08/27 09/01 09/09 09/09 09/10 09/11 09/25 09/22 10/09 10/07
28.5 09/09 09/17 09/10 09/28 09/14 09/16 09/16 10/19 09/24 10/29 10/19
24.5 09/13 10/09 09/17 10/29 09/23 09/25 09/30 11/23 10/20 12/09 10/26
20.5 09/14 11/02 09/17 11/18 10/04 10/08 10/19 12/16 10/27 **/** 11/02
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