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


SANTA ROSA, n (298107)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 04/04 04/13 04/21 04/25 04/28 05/01 05/04 05/07 05/11 05/17 05/24
32.5 03/22 04/04 04/07 04/10 04/13 04/19 04/22 04/25 05/01 05/07 05/19
28.5 03/08 03/20 03/25 03/31 04/02 04/06 04/08 04/10 04/14 04/20 05/19
24.5 02/05 03/08 03/12 03/16 03/20 03/23 03/31 04/06 04/08 04/12 05/19
20.5 01/14 02/15 02/26 03/04 03/07 03/12 03/14 03/21 03/25 03/31 04/14
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