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


QUINCY sta, (047195)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 05/13 06/04 06/13 06/24 07/08 07/15 07/20 07/25 07/28 07/30 07/30
32.5 04/21 05/11 05/18 05/23 05/29 06/06 06/12 06/21 07/06 07/17 07/30
28.5 03/21 04/15 04/22 04/27 05/03 05/08 05/11 05/15 05/20 05/31 07/30
24.5 03/07 03/20 03/27 04/04 04/09 04/13 04/19 04/21 04/28 05/04 07/01
20.5 **/** 01/30 02/11 02/27 03/05 03/13 03/17 03/26 03/30 04/06 04/28
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