Spring 'Freeze' Probabilities (Jan 1 - Jul 31)


OLD FAITHFUL, e: (486845)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 07/02 07/15 07/20 07/24 07/25 07/26 07/28 07/29 07/30 07/30 07/30
32.5 06/20 06/22 06/28 07/02 07/13 07/17 07/20 07/23 07/25 07/28 07/30
28.5 06/02 06/06 06/15 06/20 06/25 06/27 06/29 07/05 07/13 07/19 07/29
24.5 05/09 05/12 05/13 05/21 05/24 05/29 05/31 06/06 06/13 07/01 07/16
20.5 04/20 04/30 05/06 05/09 05/12 05/14 05/18 05/21 05/24 05/31 06/30
Graphic Output
 Earliest - Earliest 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 Jan. 1 to July 31 
                  period or that there was insufficient data to determine a 
                  date.

xx% - Percent probability that a minimum temperature below the threshold will occur on or after 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 never been a year when the minimum temperature went below the threshold temperature during the Jan. 1 to July 31 period or insufficient data to determine a date. 07/30 means the minimum temperature can go below the threshold temperature any day during the Jan. 1 to July 31 period.

Western Regional Climate Center, wrcc@dri.edu