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


UKIAH stat, (358726)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 07/05 07/19 07/23 07/25 07/27 07/28 07/29 07/29 07/30 07/30 07/30
32.5 06/05 06/25 07/07 07/13 07/17 07/21 07/24 07/27 07/28 07/30 07/30
28.5 04/27 05/20 05/27 06/02 06/10 06/22 06/27 07/04 07/12 07/23 07/30
24.5 04/09 04/27 05/08 05/13 05/15 05/17 05/21 05/26 05/28 06/02 07/12
20.5 03/13 04/02 04/12 04/14 04/20 04/25 05/01 05/06 05/13 05/21 06/26
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