| Month | NOAA Normals (in) | PRISM Normals (in) | Diff (in) |
|---|---|---|---|
| Jan | 0.59 | 0.58 | 0.01 |
| Feb | 0.82 | 0.87 | -0.05 |
| Mar | 1.51 | 1.49 | 0.02 |
| Apr | 3.09 | 3.31 | -0.22 |
| May | 3.88 | 3.94 | -0.06 |
| Jun | 4.05 | 4.04 | 0.01 |
| Jul | 3.23 | 3.10 | 0.13 |
| Aug | 3.13 | 3.09 | 0.04 |
| Sep | 2.87 | 2.90 | -0.03 |
| Oct | 2.47 | 2.54 | -0.07 |
| Nov | 1.16 | 1.10 | 0.06 |
| Dec | 0.83 | 0.85 | -0.02 |
27.63 | 27.81 | -0.18 |