| Month/Grand Fork | Av. max temp | Av. min temp | Av. soil temp | Total solar radiation | Total PET | Total rainfall |
| Apr-09 | 9.3 | 0.6 | 5.0 | 372 | 88.1 | 33.5 |
| May-09 | 17.7 | 4.3 | 12.9 | 479 | 166.6 | 54.1 |
| Jun-09 | 24.0 | 11.3 | 19.4 | 497 | 184.7 | 97.5 |
| Jul-09 | 24.9 | 12.5 | 22.8 | 543 | 179.3 | 44.5 |
| Aug-09 | 24.4 | 11.8 | 20.3 | 397 | 113.8 | 69.1 |
| Sep-09 | 25.1 | 10.9 | 19.6 | 362 | 118.6 | 33.5 |