| |
% Probability of Indicated Temperature or Lower on or After Date |
|||||
| 90% | 75% | 50% | 25% | 10% | |
| 32 | April 26 | May 5 | May 10 | May 20 | May 27 |
| 30 | April 16 | April 25 | May 5 | May 14 | May 25 |
| 28 | April 13 | April 20 | April 30 | May 9 | May 15 |
| 24 | March 20 | March 30 | April 11 | April 20 | April 30 |
| 20 | Feb. 23 | March 6 | March 19 | March 29 | April 6 |