| |
% Probability of Indicated Temperature or Lower on or After Date |
|||||
| 90% | 75% | 50% | 25% | 10% | |
| 32 | April 18 | April 21 | May 7 | May 14 | May 21 |
| 30 | March 31 | April 17 | April 24 | May 6 | May 12 |
| 28 | March 24 | April 3 | April 15 | April 21 | May 6 |
| 24 | Feb. 26 | March 5 | March 19 | April 2 | April 12 |
| 20 | Feb. 2 | Feb. 12 | Feb. 22 | March 6 | March 18 |