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


MT SHASTA, CALIFORNIA (045983)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 05/14 05/22 05/27 05/30 06/05 06/11 06/14 06/18 06/25 06/30 07/18
32.5 05/01 05/04 05/12 05/13 05/17 05/21 05/24 05/27 06/04 06/11 07/01
28.5 04/02 04/12 04/20 04/23 04/27 04/30 05/03 05/06 05/12 05/20 06/12
24.5 02/20 03/20 03/25 03/29 04/08 04/14 04/18 04/20 04/23 05/01 05/22
20.5 01/13 02/10 02/25 03/06 03/12 03/13 03/17 03/23 04/02 04/12 04/27
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