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


ROCKVILLE 5 N, te (357277)
Temp F Earliest 90% 80% 70% 60% 50% 40% 30% 20% 10% Latest
36.5 05/31 06/19 06/21 06/27 07/02 07/05 07/08 07/11 07/17 07/21 07/24
32.5 05/23 05/29 06/03 06/09 06/13 06/18 06/21 06/27 06/27 07/07 07/21
28.5 04/15 05/01 05/09 05/14 05/20 05/23 05/25 05/31 06/09 06/25 07/17
24.5 03/12 04/18 04/26 04/30 05/02 05/06 05/07 05/13 05/17 05/21 05/26
20.5 03/02 04/05 04/09 04/16 04/19 04/26 05/02 05/04 05/07 05/15 05/25
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